1、 TIA-1131-2009 APPROVED: MAY 1, 2009 REAFFIRMED: DECEMBER 2, 2013 TIA-1131 May 2009Video Code for 3GPP2 Packet Switched Multimedia Services H.263 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers an
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19、AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA-1131 iii PREFACE This specification provides normative and informative recommendations for H.263 decoding for 3GPP2 Packet Switched Multimedia Services. TIA-1131 iv CONTENTS Notes v 1 Introduction and Scope.1 2 References
20、 .2 3 Definitions and Abbreviations .2 3.1 Abbreviations2 4 H.263 Decoding 3 4.1 Normative recommendation.3 4.2 Informative recommendation.3 TIA-1131 v NOTES The following verbal forms are used: “shall” and “shall not” identify requirements to be followed strictly to conform to the standard and from
21、 which no deviation is permitted. “Should” and “should not” indicate that one of several possibilities is recommended as particularly suitable, without mentioning or excluding others; that a certain course of action is preferred but not necessarily required; or that (in the negative form) a certain
22、possibility or course of action is discouraged but not prohibited. “May” and “need not” indicate a course of action permissible within the limits of the standard. “Can” and “cannot” are used for statements of possibility and capability, whether material, physical, or causal. TIA-1131 1 1 Introductio
23、n and Scope ITU-T Recommendation H.263 (01/05) 4 has been adopted as a video codec for various 3GPP2 multimedia services such as Multimedia Messaging Service (MMS, 1), Multimedia Streaming Service (MSS, 2), and Packet Switched Video Telephony (PSVT, 3). The ITU-T recommendation 4 only specifies synt
24、ax elements and decoding process under lossless condition. However, parts of video information for 3GPP2 Packet Switched Multimedia (PSM) Services may be lost due to latency, over the air loss, etc. Therefore, this specification provides informative recommendation of H.263 decoding when parts of vid
25、eo information for 3GPP2 PSM services are lost. TIA-1131 2 2 References The following documents contain provisions, which, through reference in this text, constitute provisions of this document. References are either specific (identified by date of publication, edition number, version number, etc.)
26、or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP2 document, a non-specific reference implicitly refers to the latest version of that document in the same Release as the present
27、 document. 1 TIA 1011-A, Multimedia Messaging Service (MMS) Media Format and Codecs for cdma2000 Spread Spectrum Systems, Apr., 2006 2 TIA 1079, 3G Multimedia Streaming Services, Mar., 2006 3 TIA 924, Packet Switched Video Telephony Services (PSVT/MCS), Mar., 2007 4 ITU-T: “Video Coding for Low Bit
28、Rate Communication,“ ITU-T Recommendation H.263, Jan., 2005 3 Definitions and Abbreviations This section contains definitions, symbols and abbreviations that are used throughout the document. 3.1 Abbreviations 3GPP2 3rdGeneration Partnership Project 2 Codec Coder-Decoder ITU-T International Telecomm
29、unication Union Telecommunication Standardization Sector MMS Multimedia Messaging Service MS Mobile Station MSS Multimedia Streaming Service PSM Packet Switched Multimedia PSVT Packet Switched Video Telephony TIA-1131 3 4 H.263 Decoding This section provides normative and informative recommendations
30、 for H.263 decoding for 3GPP2 PSM services. 4.1 Normative recommendation H.263 bitstream syntax for 3GPP2 PSM services shall be compliant to 4. Decoding procedure of lossless and/or error concealed bitstream shall follow 4. 4.2 Informative recommendation Video information loss for 3GPP2 PSM services
31、 should be detected by a receiver. The loss can be detected by using information from the other layers or by detecting syntax element violations. When video information loss is detected, the receiver should conceal the lost information. THE TELECOMMUNICATIONS INDUSTRY ASSOCIATION TIA represents the
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33、rmation technology, cable, satellite, and unified communications. TIA members products and services empower communications in every industry and market, including healthcare, education, security, public safety, transportation, government, the utilities. TIA is accredited by the American National Standards Institute (ANSI).
