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Versions: (draft-edwards-avt-rtp-jpeg2000) 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 RFC 5371

Audio Video Transport                                         S. Futemma
Internet-Draft                                                  A. Leung
Expires: July 29, 2006                                        E. Itakura
                                                                    Sony
                                                        January 25, 2006


             RTP Payload Format for JPEG 2000 Video Streams
                      draft-ietf-avt-rtp-jpeg2000-09

Status of this Memo

   By submitting this Internet-Draft, each author represents that any
   applicable patent or other IPR claims of which he or she is aware
   have been or will be disclosed, and any of which he or she becomes
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   This Internet-Draft will expire on July 29, 2006.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This memo describes an RTP payload format for the ISO/IEC
   International Standard 15444-1 | ITU-T Rec. T.800, otherwise better
   known as: JPEG 2000.  JPEG 2000 features are considered and there are
   provisions in the design of this payload format.  JPEG 2000 is a
   truly scalable compression technology allowing applications to encode
   one way and decode many different ways.  Extending from a single
   image to a series of JPEG 2000 images, one has a JPEG 2000 video



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   stream.


Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Conventions Used in This Document  . . . . . . . . . . . .  6
   2.  JPEG 2000 Video Features . . . . . . . . . . . . . . . . . . .  7
   3.  Payload Design . . . . . . . . . . . . . . . . . . . . . . . .  8
   4.  Payload Format . . . . . . . . . . . . . . . . . . . . . . . .  9
     4.1.  RTP Fixed Header Usage . . . . . . . . . . . . . . . . . .  9
     4.2.  RTP Payload Header Format  . . . . . . . . . . . . . . . .  9
   5.  RTP Packetization  . . . . . . . . . . . . . . . . . . . . . . 13
   6.  Security Consideration . . . . . . . . . . . . . . . . . . . . 15
   7.  IANA Consideration . . . . . . . . . . . . . . . . . . . . . . 16
     7.1.  Media Type Registration  . . . . . . . . . . . . . . . . . 16
     7.2.  SDP Parameters . . . . . . . . . . . . . . . . . . . . . . 18
   8.  Usage with the SDP Offer/Answer Model  . . . . . . . . . . . . 19
     8.1.  Examples . . . . . . . . . . . . . . . . . . . . . . . . . 19
   9.  Intellectual Property Right Statement  . . . . . . . . . . . . 21
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 22
     10.1. Normative References . . . . . . . . . . . . . . . . . . . 22
     10.2. Informative References . . . . . . . . . . . . . . . . . . 22
   Appendix A.  Informative Appendix  . . . . . . . . . . . . . . . . 23
     A.1.  Recommended Practices  . . . . . . . . . . . . . . . . . . 23
     A.2.  Sample Headers in Detail . . . . . . . . . . . . . . . . . 23
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 31
   Intellectual Property and Copyright Statements . . . . . . . . . . 32























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1.  Introduction

   This document specifies a payload format for JPEG 2000 video streams
   over the Real-time Transport Protocol (RTP).  JPEG 2000 is an ISO/IEC
   International Standard and ITU-T Recommendation (ISO/IEC
   International Standard 15444-1 | ITU-T Rec. T.800) developed for next
   generation still image compression.  JPEG is and stands for the:
   Joint Photograhers Experts Group developing the image compression
   standard.  Its basic compression technology is described in detail in
   [1] with motion covered in: [9] .

   Part 3 of the JPEG 2000 standard defines Motion JPEG 2000 [9].
   However, Motion JPEG 2000 focuses on the file format and it does not
   specify the transmission format for the network.

   JPEG 2000 supports many powerful features that are not supported in
   the current JPEG standard [1] & [9]:

   o  Higher compression efficiency than JPEG with less visual loss or
      distortion especially at extreme compression ratios.

   o  A single codestream that offers both lossy and lossless
      compression.

   o  Better error resiliency than JPEG.

   o  Progressive transmission by pixel accuracy (SNR scalability) and
      resolution (resolution scalability.)

   o  Random codestream access and processing.





















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   The JPEG 2000 algorithm is briefly explained.  Figure 1 shows a block
   diagram of the JPEG 2000 encoding method.

                                                    +-----+
                                                    | ROI |
                                                    +-----+
                                                       |
                                                       V
                  +----------+   +----------+   +------------+
                  |DC, comp. |   | Wavelet  |   |            |
   Raw Image  ==> |transform-|==>|transform-|==>|Quantization|==+
                  |  ation   |   |  ation   |   |            |  |
                  +----------+   +----------+   +------------+  |
                                                                |
                 +-----------+   +----------+   +------------+  |
                 |           |   |          |   |            |  |
    JPEG 2000 <==| Data      |<==| Rate     |<==| EBCOT      |<=+
    codestream   | Ordering  |   | Control  |   |            |
                 +-----------+   +----------+   +------------+


   Figure 1: Block diagram of the JPEG 2000 encoder

   The image is transformed into wavelet coefficients.  The image is
   sampled into various levels usually vertically and horizontally from
   high frequencies (which contains all the sharp details) to the low
   frequencies (which contains all the flat areas.)  Quantization is
   performed on the coefficients within each sub-band.

   After quantization, code blocks are formed from within the precincts
   within the tiles.  Precincts are a finer separation than tiles and
   code blocks are the smallest separation of the image data.  EBCOT
   coding (Embedded Block Coding Optimized for Truncation) is performed
   within each code block and arithmetically encoded by bit plane.  Rate
   control is performed to achieve the highest quality image for the
   specified rate.

   As a result, for a given tile, data units called JPEG 2000 packets
   are generated, which contain data from a specific layer, a specific
   component, a specific resolution, and a specific precinct.

   Finally, for data ordering, the JPEG 2000 packets are interleaved
   according to the progression along four axes: layer, resolution,
   component and precinct, and add a JPEG 2000 header to become a fully
   compliant JPEG 2000 codestream.

   To decompress a JPEG 2000 codestream, one would follow the reverse
   order of the encoding order, minus the quantization, rate control,



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   and data ordering step.

   It is outside the scope of this document to describe in detail this
   procedure.  Please refer to various JPEG 2000 texts for further
   details [1].

   Figure 2 shows a JPEG 2000 codestream in detail.  A JPEG 2000
   codestream is structured from the main header beginning with the SOC
   (Start Of Codestream) marker, one or more tiles, and the EOC (End Of
   Codestream) marker to indicate the end of the codestream.  Each tile
   consists of a tile-part header that starts with the SOT (Start of
   Tile) marker and ends with a SOD (Start of Data) marker, and
   bitstream (a series of JPEG 2000 packet.)

           +--  +------------+
     Main  |    |    SOC     |  Required as the first marker.
     header|    +------------+
           |    |    main    |  Main header marker segments
           +--  +------------+
           |    |    SOT     |  Required at the beginning of each
     Tile- |    +------------+    tile-part header.
     part  |    |   T0,TP0   |  Tile 0, tile-part 0 header marker
     header|    +------------+    segments
           |    |    SOD     |  Required at the end of each tile-part
           +--  +------------+    header
                | bitstream  |  Tile-part bitstream
           +--  +------------+
           |    |    SOT     |
     Tile- |    +------------+
     part  |    |   T1,TP0   |
     header|    +------------+
           |    |    SOD     |
           +--  +------------+
                | bit stream |
                +------------+
                      .
                      .
                      .
                +------------+
                |    EOC     |  Required as the last marker in the code
                +------------+  stream


   Figure 2: Basic construction of the JPEG 2000 codestream







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1.1.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC2119 [2].














































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2.  JPEG 2000 Video Features

   JPEG 2000 video streams are formed as a continuous series of JPEG
   2000 still images.  Previously described features of JPEG 2000 may be
   used effectively in streaming applications.  A JPEG 2000 video stream
   has the following qualities:

   o  At low bit rates, the SNR is improved dramatically over JPEG and
      Motion JPEG.

   o  This is a full intra frame format - each frame is independently
      compressed - and therefore has a low encoding and decoding delay.

   o  JPEG 2000 has flexible and accurate rate control.

   o  This is suitable for traffic control and congestion control during
      network transmission.

   o  JPEG 2000 can provide its own codestream error resilience markers
      to aid in codestream recovery outside of this specification.































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3.  Payload Design

   To provide a payload format that maximizes JPEG 2000 features, the
   following are taken into consideration:

   o  Provisions for packet loss:

      On the Internet, 5% packet loss is common and this percentage may
      vary, upto 20% or more.  To split JPEG 2000 video streams into RTP
      packets, efficient packetization of the code stream is required to
      minimize problems in decoding due to missing packets.  If the main
      header is lost, the image cannot be decoded.

   o  JPEG 2000 Scalability

      JPEG 2000 has powerful scalability features and markers in the
      payload header are to indicate specific meaning of the payload.
      Such as:

      *  Since this is primarily for video applications, special markers
         are used to indicate format (i.e. interlace odd/even fields).

      *  Special markers for the headers, fragment of headers, etc.

      *  Tile numbering for association of packets

      *  Priorities of the packet using RFC XXXX

      *  Main header recovery using RFC XXX

      Further usage of the payload header is described in RFC XXXX.




















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4.  Payload Format

4.1.  RTP Fixed Header Usage

   For each RTP packet, the RTP fixed header is followed by the JPEG
   2000 RTP payload header, which is followed by the payload, a piece of
   a JPEG 2000 codestream.

   The RTP header fields that have a meaning specific to a JPEG 2000
   video stream are described as follows:

   Marker bit (M): The marker bit of the RTP fixed header MUST be set to
      1 on the last RTP packet of a video frame, otherwise, it MUST be
      0.  When transmission is performed by multiple RTP sessions, this
      bit is 1 in the last packet of the frame in each session.

   Payload type (PT): The payload type is dynamically assigned by means
      outside the scope of this document.  A payload type in the dynamic
      range shall be chosen by means of an out of band signaling
      protocol (e.g., RTSP, SIP, etc.)

   Timestamp: The RTP timestamp are in units of 90 kHz.  The same
      timestamp value MUST appear in each RTP packet carrying a fragment
      of a given frame.  When a JPEG 2000 image is in interlace format,
      the odd field and the corresponding even field MUST have the same
      timestamp.  The initial value of the timestamp is to be random to
      counter known plaintext attacks on encryption.

4.2.  RTP Payload Header Format

   The RTP payload header format for JPEG 2000 video stream is as
   follows:

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |tp |MHF|mh_id|T|     priority  |           tile number         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |reserved       |             fragment offset                   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 3: RTP payload header format for JPEG 2000

   tp (type) : 2 bits

      This field indicates how a JPEG 2000 image is scanned (meaning -
      progressive or interlace).



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         0: The payload is progressively scanned.

         1: The payload is the odd field of an interlaced video signal.
         The height specified in the JPEG 2000 main header is half of
         the height of the entire displayed image.  In a receiver, an
         odd field should be de-interlaced with the even field following
         it so that lines from each image are displayed alternately.

         2: The payload is the even field of an interlaced video signal.

         3: The payload is a single field from an interlaced video
         signal, intended to be displayed full frame as if it were
         received as both the odd & even field of the frame.  On a
         computer monitor, each line in the image should be displayed
         twice, doubling the height of the image.

   MHF (Main Header Flag) : 2 bits

      MHF indicates whether a main header or piece of a main header is
      in the RTP packet.

       If there is no header, MHF has a value of 0.  If there is just a
       part of a fragmented header, MHF has a value of 1.  If there is
      the last part of a fragmented header, MHF has value of 2.  If the
              whole header in the packet, MHF has a value of 3.

             +-----------+----------------------------------+
             | MHF Value | Description                      |
             +-----------+----------------------------------+
             |     0     | no main header in the payload    |
             |           |                                  |
             |     1     | piece of fragmented header       |
             |           |                                  |
             |     2     | last part of a fragmented header |
             |           |                                  |
             |     3     | a whole main header              |
             +-----------+----------------------------------+

                          Table 1: MHF Usage Values

   mh_id (Main Header Identification) : 3 bits

      Main header identification value.  This is used for JPEG 2000 main
      header recovery.

      For implementations following this specification, the sender
      SHOULD set this value to 0 and the receiver SHOULD ignore this
      field on processing.



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      Usage of this header is described in further detail in supplmental
      RFC draft: RTP Payload format for JPEG 2000: Extensions for
      Scalability and Main Header Recovery.

   T (Tile field invalidation flag) : 1 bit

      The T bit indicates whether the tile number field is valid or
      invalid.  A sender MUST set the T bit to 1 when invalid and 0 when
      valid.

      There are two cases where the tile number field is invalid:

      *  When an RTP packet holds only the main header.  A sender cannot
         set any number in the tile number field as no JPEG 2000 tile-
         part bitstream is included in the RTP packet.

      *  Multiple tile-parts are packed together in a single payload.
         If there are multiple tiles packed into a single payload, there
         is no meaning to assign a number to the tile number field.

   priority : 8 bits

      The priority field indicates the importance of the JPEG 2000
      packet included in the payload.  Typically, a higher priority is
      set in the packets containing JPEG 2000 packets containing the
      lower sub-bands.

      For implementations following this specification, the sender
      SHOULD set this value to 255 and the receiver SHOULD ignore this
      field on processing.

   tile number : 16 bits

      This field shows the tile number of the payload.  This field is
      only valid when the T bit is 0.  If T bit is set to 1, the
      receiver MUST ignore this field.

   R (Reserved) : 8 bits

      This bit is reserved for future use.  Senders MUST set this to 0.
      Receivers MUST ignore this field.

   fragment offset : 24 bits

      This value MUST be set to the byte offset of the current payload
      in relation to the very beginning of each JPEG 2000 codestream
      (JPEG 2000 frame).




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      Byte offsets are calculated from the start of each JPEG 2000
      codestream up to the current position where the current payload
      would fit into the complete JPEG 2000 codestream.

      To perform scalable video delivery by using multiple RTP sessions,
      the offset value from the first byte of the same frame is set for
      fragment offset.  It is then possible, to deliver layered video
      using multiple RTP sessions, the fragment offset may not start
      from 0 in some RTP sessions even if the packet is the first one
      received.









































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5.  RTP Packetization

   The sender must packetize the JPEG 2000 appropriately according to
   initial MIME parameters and/or details from SDP offer/answer
   parameters.

   A "packetization unit" is defined as either a JPEG 2000 main header,
   a tile-part header, or a JPEG 2000 packet.

   First, a sender divides the JPEG 2000 codestream into packetization
   units by parsing the codestream or by getting information from the
   encoder, and packs the packetization units into RTP packets.  A
   sender can put an arbitrary number of packetization units into an RTP
   packet, but it MUST preserve the codestream order.  An example of
   this kind of RTP packet format is shown in Figure 4:

   +------+-------+---------------+---------------+
   |RTP   |payload| packetization | packetization |
   |header|header | unit          | unit          |
   +------+-------+---------------+---------------+


   Figure 4: An Example of RTP packet format with multiple packetization
   units

   If a packetization unit with headers (IP header, RTP header and
   payload header) is larger than the MTU size, it MAY be fragmented.
   To pack a fragmented packetization unit, the fragmented unit MUST NOT
   be packed with the succeeding packetization unit within the same RTP
   packet.  An example of this kind of RTP packet format is shown in
   Figure 5:

   +------+-------+-------------------------------------------------+
   |RTP   |payload| packetization unit fragment                     |
   |header|header |                                                 |
   +------+-------+-------------------------------------------------+
   +------+-------+-------------------------------------------------+
   |RTP   |payload| packetization unit fragment                     |
   |header|header |                                                 |
   +------+-------+-------------------------------------------------+
              .
              .
              .
   +------+-------+--------------------------------------------+
   |RTP   |payload| end of packetization unit fragment         |
   |header|header |                                            |
   +------+-------+--------------------------------------------+




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   Figure 5: An Example of RTP packet format with a fragmented
   packetization unit

















































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6.  Security Consideration

   RTP packets using the payload format defined in this specification
   are subject to the security considerations discussed in the RTP
   specifications [3] and any applicable profile.  This implies that
   confidentiality of the media streams is achieved by encryption.  Data
   compression used with this payload format is applied end-to-end,
   encryption may be performed on the compressed data so there is no
   conflict between the two operations.

   A potential denial-of-service threat exists for data encodings using
   compression techniques that have non-uniform receiver-end
   computational load.  The attacker can inject pathological datagrams
   into the stream which are complex to decode and cause the receiver to
   be overloaded.  The usage of authentication of at least the RTP
   packet is RECOMMENDED, for example with SRTP [4].

   If QoS enhanced service is used, RTP receivers SHOULD monitor packet
   loss to ensure that the service that was requested is actually being
   delivered.  If it is not, then they SHOULD assume that they are
   receiving best-effort service and behave accordingly.

   If best-effort service is being used, users of this payload format
   MUST monitor packet loss to ensure that the packet loss rate is
   within acceptable parameters.  Packet loss is considered acceptable
   if a TCP flow across the same network path, experiencing the same
   network conditions, would achieve an average throughput, measured on
   a reasonable timescale, that is not less than the RTP flow is
   achieving.  This condition can be satisfied by implementing
   congestion control mechanisms to adapt the transmission rate (or the
   number of layers subscribed for a layered multicast session), or by
   arranging for a receiver to leave the session if the loss rate is
   unacceptably high.

   As with any IP-based protocol, in some circumstances a receiver may
   be overloaded simply by receiving too many packets, either desired or
   undesired.  Network-layer authentication may be used to discard
   packets from undesired sources, but the processing cost of the
   authentication itself may be too high.  In a multicast environment,
   pruning of specific sources may be implemented in future versions of
   IGMP [10] and in multicast routing protocols to allow a receiver to
   select which sources are allowed to reach it.









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7.  IANA Consideration

7.1.  Media Type Registration

   This registration uses the template defined in [7] and follows [8].

   Type name: video

   Subtype name: jpeg2000

   Required parameters:

      sampling: A list of values specifying the color space of the
      payload data.

      Acceptable values:

         RGB: standard Red, Green, Blue color space.

         BGR: standard Blue, Green, Red color space.

         RGBA: standard Red, Green, Blue, Alpha color space.

         BGRA: standard Blue, Green, Red, Alpha color space.

         YCbCr-4:4:4: standard YCbCr color space, no subsampling

         YCbCr-4:2:2: standard YCbCr color space, U & V are subsampled
            horizontally by 1/2

         YCbCr-4:2:0: standard YCbCr color space, U & V are subsampled
            horizontally and vertically by 1/2

         YCbCr-4:1:1: standard YCbCr color space, U & V are subsampled
            vertically by 1/4

         GRAYSCALE: basically a single component image of just
            multilevels of grey.

   Optional parameters:

      interlace: interlace scanning.  If this options is present, it
         means the payload is in interlace format.  Each complete image
         forms vertically half the display. tp value MUST properly
         specify the field the image represents odd(tp=1), even(tp=2),
         or frame(tp=3).  If this option is not present, the payload is
         in progressive format and tp MUST be set to 0.




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      width: A parameter describing the maximum width of the video
         stream.  This parameter MUST appear when height is present.
         Acceptable values: - an integer value between 0 -
         4,294,967,295.

      height: A parameter describing the maximum height of the video
         stream.  This parameter MUST appear when width is present.
         Acceptable values: - an integer value between 0 -
         4,294,967,295.

   The receiver MUST ignore any unspecified parameters.

   Encoding considerations:

      JPEG 2000 video stream may be transmitted with RTP as specified in
      this document.

   Security considerations: See section Section 6 of this document.

   Interoperability considerations:

      JPEG 2000 video stream is a sequence of JPEG 2000 still images.
      An implementation in compliant with [1] can decode and attempt to
      display the encoded JPEG 2000 video stream.

   Published specification: ISO/IEC 15444-1 | ITU-T Rec. T.800

   Applications which use this media type:

      video streaming and communication

   Additional information: none

   Magic number(s): none

   File extension(s): none

   Macintosh File Type Code(s): none

   Person & email address to contact for further information:

      Eisaburo Itakura, Satoshi Futemma
      Email: {itakura|satosi-f}@sm.sony.co.jp

   Intended usage: COMMON

   Authors:




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      Eisaburo Itakura, Satoshi Futemma
      Email: {itakura|satosi-f}@sm.sony.co.jp

   Change controller:
      IETF Audio/Video Transport Working Group delegated from the
      IESG.

7.2.  SDP Parameters

   The MIME media type video/jpeg2000 string is mapped to fields in the
   Session Description Protocol (SDP) [5] as follows:

   o  The media name in the "m=" line of SDP MUST be video.

   o  The encoding name in the "a=rtpmap" line of SDP MUST be jpeg2000
      (the MIME subtype).

   o  The clock rate in the "a=rtpmap" line MUST be 90000.

   o  The REQUIRED parameters "sampling", MUST be included in the
      "a=fmtp" line of SDP.

   o  The OPTIONAL parameters "width", and "height", when present, MUST
      be included in the "a=fmtp" line of SDP.

   These parameters are expressed as a MIME media type string, in the
   form of a semicolon separated list of parameter=value pairs.

   Therefore, an example of media representation in SDP is as follows:

      m=video 49170/2 RTP/AVP 98
      a=rtpmap:98 jpeg2000/90000
      a=fmtp:98 sampling=YCbCr-4:2:0;width=128;height=128


















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8.  Usage with the SDP Offer/Answer Model

   When offering JPEG 2000 over RTP using SDP in an Offer/Answer model
   [6], the following rules and limitations apply:

   o  All parameters MUST have an acceptable value for that parameter.

   o  All parameters MUST correspond to the parameters of the payload.

   o  The parameter "sampling" with an acceptable answer MUST appear in
      the offer and the answer

   o  For optional parameters "width" and "height" the following
      applies:

      *  if "width" appears in the offer or answer, "height" MUST be
         present.

      *  if "height" appears in the offer or answer, "width" MUST be
         present.

   o  Any unknown options in the Offer should be deleted from the
      Answer.

8.1.  Examples

   An example offer/answer exchanges are provided.

   Alice offers YCbCr 422 color space, interlace image with 720-pixel
   width and 480-pixel height as below:

      v=0
      o=alice 2890844526 2890844526 IN IP4 host.anywhere.com
      s=
      c=IN IP4 host.anywhere.com
      t=0 0
      m=video 49170 RTP/AVP 98
      a=rtpmap:98 jpeg2000/90000
      a=fmtp:98 sampling=YCbCr-4:2:2;interlace
      a=fmtp:98 width=720; height=480

   Bob accepts YCbCr-4:2:2 color space, interlace image and replies:

      v=0
      o=bob 2890844730 2890844731 IN IP4 host.example.com
      s=
      c=IN IP4 host.example.com
      t=0 0



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      m=video 49920 RTP/AVP 98
      a=rtpmap:98 jpeg2000/90000
      a=fmtp:98 sampling=YCbCr-4:2:2;interlace
















































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9.  Intellectual Property Right Statement

   The IETF takes no position regarding the validity or scope of any
   Intellectual Property Rights or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; nor does it represent that it has
   made any independent effort to identify any such rights.  Information
   on the procedures with respect to rights in RFC documents can be
   found in BCP 78 and BCP 79.

   Copies of IPR disclosures made to the IETF Secretariat and any
   assurances of licenses to be made available, or the result of an
   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at
   http://www.ietf.org/ipr.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement
   this standard.  Please address the information to the IETF at
   ietf-ipr@ietf.org.




























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10.  References

10.1.  Normative References

   [1]  ISO/IEC JTC1/SC29, ISO/IEC 15444-1 | ITU-T Rec. T.800,
        "Information Technology - JPEG 2000 Image Coding System - Part
        1: Core Coding System", December 2000.

   [2]  Bradner, "Key words for use in RFCs to Indicate Requirement
        Levels", RFC 2119, March 1997.

   [3]  Schulzrinne, Casner, Frederick, and Jacobson, "RTP: A Transport
        Protocol for Real Time Applications", RFC 3550, STD 64,
        July 2003.

   [4]  Baugher, McGrew, Naslund, Carrara, and Norrman, "The Secure
        Real-time Transport Protocol (SRTP", RFC 3711, March 2004.

   [5]  Handley and Jacobson, "SDP: Session Description Protocol",
        RFC 2327, April 1998.

   [6]  Rosenberg and Schulzrinne, "An Offer/Answer Model with Session
        Description Protocol (SDP)", RFC 3264, June 2002.

   [7]  Freed and Klensin, "Media Type Specifications and Registration
        Procedures", RFC 4288, December 2005.

   [8]  Casner and Hoschka, "MIME Type Registration of RTP Payload
        Formats", RFC 3555, July 2003.

10.2.  Informative References

   [9]   ISO/IEC JTC1/SC29, ISO/IEC 15444-1 | ITU-T Rec. T.800,
         "Information Technology - JPEG 2000 Image Coding System - Part
         3: Motion JPEG 2000", July 2002.

   [10]  Deering, "Host Extensions for IP Multicasting", RFC 1112,
         August 1989.













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Appendix A.  Informative Appendix

A.1.  Recommended Practices

   Error Resilience Markers The use of error resilience markers in the
      JPEG 2000 data stream is highly recommended in all situations.
      Error recovery with these markers is helpful to the decoder and
      save external resources.  Markers such as: RESET, RESTART, and
      ERTERM.

   YCbCr Color space The YCbCr color space provides the greatest amount
      of compression in color with respect to the human visual system.
      When used with JPEG 2000, the usage of this color space can
      provide excellent visual results at extreme bit rates.

   Progression Ordering JPEG 2000 offers many different ways to order
      the final code stream to optimize the transfer with the
      presentation.  The most useful ordering in our usage cases have
      been for layer progression and resolution progression ordering.

   Tiling and Packets JPEG 2000 packets are formed regardless of the
      encoding method.  The encoder has little control over the size of
      these JPEG 2000 packets as they maybe large or small.  Tiling
      splits the image up into smaller areas and each are encoded
      separately.  With tiles, the JPEG 2000 packet sizes are also
      reduced.  When using tiling, almost all JPEG 2000 packet sizes are
      an acceptable size (i.e. smaller than the MTU size of most
      networks.)

   Sender Processing There are no limitations as to how the sender
      should pack the payload.  In general, the sender should pack
      headers separately from the rest of the codestream to make header
      recovery simple.  Payloads should generally begin with an SOP
      marker and end with EPH marker for easier decoder processing.

A.2.  Sample Headers in Detail

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |tp |MHF|mh_id|T|     priority  |           tile number         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |reserved       |             fragment offset                   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 6




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   First Packet: This packet will have the whole main header. 210bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|1 1|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF4FFF51002F000 ....                                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 7

   Second Packet: This packet will have a tile header and the first tile
   part LLband 1500bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|1 1|0 0 0|0|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0000 0000 2DB3  0001 FF93                            |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 8

   Third Packet: This packet will have the next part in the tile, no
   tile header 1500bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 0|0 0 0|0|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 1 0 1 1 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |E841 4526 4556 9850 C2EA  ....                                 |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 9





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   Fourth Packet: Last packet for the image 290bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 0|0 0 0|0|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0 0 1 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |A55D 8B73 3B25 25C7 B9EB        ....                   2FBEB153|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 10

   First Packet: This packet will have the whole main header. 210bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|1 1|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF4FFF51002F000 ....                                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 11

   Second Packet: This packet will have a first tile part (tile 0)
   1400bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 0|0 0 0|0|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0000 0000 0578  0001 FF93  ....                      |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 12






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   Third Packet: This packet will have a second tile part (tile 1)
   1423bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 0|0 0 0|0|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0 1 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0001 0000 058F 0001 FF93    ....                     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 13

   Fourth Packet: This packet will have a third tile part (tile 2)
   1355bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 0|0 0 0|0|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 0 1 1 0 0 1|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0002 0000 054B 0001 FF93    ....                     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 14

   Fifth Packet: This packet will have a fourth tile part (tile 3)
   1290bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 0|0 0 0|0|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0003 0000 050A 0001 FF93    ....                     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 15




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   First Packet: This packet will have the first part of the main
   header. 110bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 1|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF4FFF51002F000 ....                                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 16

   Second Packet: This packet has the second part of the header.
   1400bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|1 0|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 1 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF6400FF ....                                                  |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 17

   Third Packet: This packet has two tiles, tile 0 and tile 1 1400bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 0|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 0 0 1 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0000 0000 02BC 0001 FF93  ...                        |
   |FF90 000A 0001 0000 02BC 0001 FF93 ...                         |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 18




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   Fourth Packet: This packet has one tile, tile 2 1395bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0|0 0|0 0 0|0|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 1 1 1 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0002 0000 0573 0001 FF93    ....                     |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 19

   First packet: This packet will have the whole main header for the odd
   field 210bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 1|1 1|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF4FFF51002F000 ....                                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 20

   Second packet: This packet will have the first part of the odd
   field's tile 1400bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 1|0 0|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0000 0000 0578  0001 FF93  ....                      |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 21





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   Third packet: This packet will have the second part of the odd
   field's tile 1400bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 1|0 0|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0 1 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |7F04 E708 27D9 D11D 22CB ...                                   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 22

   Fourth packet: This packet will have the third part of the odd
   field's tile 1300bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 1|0 0|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 0 0 0 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |98BD EC9B 2826 DC62 D4AB ...                                   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 23

   Fifth packet: This packet will have the whole main header for the
   even field

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |1 0|1 1|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF4FFF51002F000 ....                                           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 24




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   Sixth packet: This packet will have the first part of the odd field's
   tile 1400bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |1 0|0 0|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |FF90 000A 0000 0000 0578  0001 FF93  ....                      |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 25

   Seventh packet: This packet will have the second part of the odd
   field's tile 1400bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |1 0|0 0|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 0 1 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |626C 42F0 166B 6BD0 F8E1 ...                                   |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 26

   Eighth packet: This packet will have the third part of the odd
   field's tile 1300bytes

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |1 0|0 0|0 0 0|1|1 1 1 1 1 1 1 1|0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |0 0 0 0 0 0 0 0|0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 0 0 0 0 1 0|
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |8114 41D5 18AB 4A1B ...                                        |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


   Figure 27




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Authors' Addresses

   Satoshi Futemma
   Sony Corporation
   6-7-35 Kitashinagawa
   Shinagawa-ku
   Tokyo  141-0001
   Japan

   Phone: +81 3 5448 2125
   Email: satosi-f@sm.sony.co.jp
   URI:   http://www.sony.com/


   Andrew Leung
   Sony Corporation
   6-7-35 Kitashinagawa
   Shinagawa-ku
   Tokyo  141-0001
   Japan

   Phone: +81 3 5448 2125
   Email: andrew @ ualberta . net
   URI:   http://www.sony.com/


   Eisaburo Itakura
   Sony Corporation
   6-7-35 Kitashinagawa
   Shinagawa-ku
   Tokyo  141-0001
   Japan

   Phone: +81 3 5448 2125
   Email: itakura@sm.sony.co.jp
   URI:   http://www.sony.com/















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Intellectual Property Statement

   The IETF takes no position regarding the validity or scope of any
   Intellectual Property Rights or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; nor does it represent that it has
   made any independent effort to identify any such rights.  Information
   on the procedures with respect to rights in RFC documents can be
   found in BCP 78 and BCP 79.

   Copies of IPR disclosures made to the IETF Secretariat and any
   assurances of licenses to be made available, or the result of an
   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at
   http://www.ietf.org/ipr.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement
   this standard.  Please address the information to the IETF at
   ietf-ipr@ietf.org.


Disclaimer of Validity

   This document and the information contained herein are provided on an
   "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
   OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
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Acknowledgment

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