INTERNATIONAL ISO IEC STANDARD 14496 15 Google

International Iso Iec Standard 14496 15 Google-Free PDF

  • Date:04 May 2020
  • Views:21
  • Downloads:0
  • Pages:29
  • Size:218.68 KB

Share Pdf : International Iso Iec Standard 14496 15 Google

Download and Preview : International Iso Iec Standard 14496 15 Google


Report CopyRight/DMCA Form For : International Iso Iec Standard 14496 15 Google


Transcription:

ISO IEC 14496 15 2004 E,ISO IEC 14496 15 2004 E,Contents Page. Foreword iv,Introduction v,2 Normative references 1. 3 Terms definitions symbols and abbreviated terms 1. 3 1 Terms and definitions 1,3 2 Symbols and abbreviated terms 2. 4 Extensions to the ISO Base Media File Format 2,4 1 Introduction 2. 4 2 File identification 2,4 3 Independent and Disposable Samples Box 2.
4 4 Sample groups 3,4 4 1 Introduction 3,4 4 2 SampleToGroup Box 4. 4 4 3 SampleGroupDescription Box 5,4 5 Random access recovery points 6. 4 5 1 Syntax 6,4 5 2 Semantics 6, 4 6 Representation of new structures in movie fragments 7. 5 AVC elementary streams and sample definitions 7,5 1 Elementary stream structure 7. 5 2 Sample and Configuration definition 9,5 2 1 Introduction 9.
5 2 2 Canonical order and restrictions 9,5 2 3 AVC sample structure definition 11. 5 2 4 Decoder configuration information 11,5 3 Derivation from ISO Base Media File Format 13. 5 3 1 Introduction 13,5 3 2 AVC File type and identification 13. 5 3 3 AVC Track Structure 13,5 3 4 AVC Video Stream Definition 13. 5 3 5 AVC parameter set stream definition 15,5 3 6 Template fields used 16.
5 3 7 Visual width and height 16,5 3 8 Parameter sets 17. 5 3 9 Decoding time DTS and composition time CTS 17. 5 3 10 Sync sample IDR 17,5 3 11 Shadow sync 17,5 3 12 Layering and sub sequences 18. 5 3 13 Alternate streams and switching pictures 21. 5 3 14 Random access recovery points 23,5 3 15 Hinting 23. ISO IEC 14496 15 2004 E, ISO the International Organization for Standardization and IEC the International Electrotechnical. Commission form the specialized system for worldwide standardization National bodies that are members of. ISO or IEC participate in the development of International Standards through technical committees. established by the respective organization to deal with particular fields of technical activity ISO and IEC. technical committees collaborate in fields of mutual interest Other international organizations governmental. and non governmental in liaison with ISO and IEC also take part in the work In the field of information. technology ISO and IEC have established a joint technical committee ISO IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO IEC Directives Part 2. The main task of the joint technical committee is to prepare International Standards Draft International. Standards adopted by the joint technical committee are circulated to national bodies for voting Publication as. an International Standard requires approval by at least 75 of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent. rights ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO IEC 14496 15 was prepared by Joint Technical Committee ISO IEC JTC 1 Information technology. Subcommittee SC 29 Coding of audio picture multimedia and hypermedia information. ISO IEC 14496 consists of the following parts under the general title Information technology Coding of. audio visual objects,Part 1 Systems,Part 2 Visual,Part 3 Audio.
Part 4 Conformance testing,Part 5 Reference software. Part 6 Delivery Multimedia Integration Framework DMIF. Part 7 Optimized reference software for coding of audio visual objects Technical Report. Part 8 Carriage of ISO IEC 14496 contents over IP networks. Part 9 Reference hardware description Technical Report. Part 10 Advanced Video Coding,Part 11 Scene description and application engine. Part 12 ISO base media file format, Part 13 Intellectual Property Management and Protection IPMP extensions. Part 14 MP4 file format,Part 15 Advanced Video Coding AVC file format. Part 16 Animation Framework eXtension AFX,Part 17 Streaming text format.
Part 18 Font compression and streaming,Part 19 Synthesized texture stream. ISO IEC 14496 15 2004 E,Introduction, The Advanced Video Coding AVC standard jointly developed by the ITU T and ISO IEC SC29 WG11. MPEG offers not only increased coding efficiency and enhanced robustness but also many features for the. systems that use it To enable the best visibility of and access to those features and to enhance the. opportunities for the interchange and interoperability of media this part of ISO IEC 14496 defines a storage. format for video streams compressed using AVC, This part of ISO IEC 14496 defines a storage format based on and compatible with the ISO Base Media File. Format ISO IEC 14496 12 and ISO IEC 15444 12 which is used by the MP4 file format ISO IEC 14496 14. and the Motion JPEG 2000 file format ISO IEC 15444 3 among others This part of ISO IEC 14496 enables. AVC video streams to, x be used in conjunction with other media streams such as audio. x be used in an MPEG 4 systems environment if desired. x be formatted for delivery by a streaming server using hint tracks. x inherit all the use cases and features of the ISO Base Media File Format on which MP4 and MJ2 are. This part of ISO IEC 14496 may be used as a standalone specification it specifies how AVC content shall be. stored in an ISO Base Media File Format compliant format However it is normally used in the context of a. specification such as the MP4 file format derived from the ISO Base Media File Format that permits the use. of AVC video, The ISO Base Media File Format is becoming increasingly common as a general purpose media container.
format for the exchange of digital media and its use in this context should accelerate both adoption and. interoperability, Extensions to the ISO Base Media File Format are defined here to support the new systems aspects of the. ISO IEC 14496 15 2004 E,INTERNATIONAL STANDARD ISO IEC 14496 15 2004 E. Information technology Coding of audio visual objects. Advanced Video Coding AVC file format, This part of ISO IEC 14496 specifies the storage format for AVC ISO IEC 14496 10 ITU T Rec H 264. video streams, The storage of AVC content uses the existing capabilities of the ISO Base Media File Format but also defines. extensions to support the following features of the AVC codec. x Switching pictures To enable switching between different coded streams and substitution of pictures. within the same stream, x Sub sequences and layers Provides a structuring of the dependencies of a group of pictures to.
provide for a flexible stream structure e g in terms of temporal scalability and layering. x Parameter sets The sequence and picture parameter set mechanism decouples the transmission of. infrequently changing information from the transmission of coded macroblock data Each slice. containing the coded macroblock data references the picture parameter set containing its decoding. parameters In turn the picture parameter set references a sequence parameter set that contains. sequence level decoding parameter information,2 Normative references. The following referenced documents are indispensable for the application of this document For dated. references only the edition cited applies For undated references the latest edition of the referenced. document including any amendments applies, ISO IEC 14496 1 2001 Information technology Coding of audio visual objects Part 1 Systems. ISO IEC 14496 10 Information technology Coding of audio visual objects Part 10 Advanced video. coding ITU T Rec H 264 Advanced video coding for generic audiovisual services. ISO IEC 14496 12 Information technology Coding of audio visual objects Part 12 ISO base media file. format technically identical to ISO IEC 15444 12,3 Terms definitions symbols and abbreviated terms. 3 1 Terms and definitions, For the purposes of this document the terms and definitions given in ISO IEC 14496 1. ISO IEC 14496 10 ITU T Rec H 264 and the following apply. ISO IEC 14496 15 2004 E,parameter set, a sequence parameter set or a picture parameter set as defined in ISO IEC 14496 10.
NOTE This term is used to refer to both types of parameter sets. parameter set elementary stream, elementary stream containing samples made up of only sequence and picture parameter set NAL units. synchronized with the video elementary stream,video elementary stream. elementary stream containing access units made up of NAL units for coded picture data. 3 2 Symbols and abbreviated terms,AVC Advanced Video Coding ISO IEC 14496 10. HRD Hypothetical Reference Decoder,IDR Instantaneous Decoding Refresh. NAL Network Abstraction Layer,PPS Picture Parameter Set.
SEI Supplementary Enhancement Information,SPS Sequence Parameter Set. 4 Extensions to the ISO Base Media File Format,4 1 Introduction. This clause documents technical additions to the ISO Base Media File Format which can be used when. storing AVC streams However these additions could also be used by other media if they are defined to use. them They are therefore documented here separately. 4 2 File identification, The brand avc1 shall be used to indicate that extensions conformant with this section are used in a file The. use of avc1 as a major brand may be permitted by specifications in that case that specification defines the. file extension and required behaviour,4 3 Independent and Disposable Samples Box. Box Types sdtp,Container Sample Table Box stbl,Mandatory No.
Quantity Exactly one, This optional table answers three questions about sample dependency. 1 Does this sample depend on others is it an I picture. 2 Do no other samples depend on this one, 3 Does this sample contain multiple redundant encodings of the data at this time instant possibly. with different dependencies,ISO IEC 14496 15 2004 E. In the absence of this table, 1 the sync sample table answers the first question in most video codecs I pictures are also sync. 2 the dependency of other samples on this one is unknown. 3 the existence of redundant coding is unknown, When performing trick modes such as fast forward it is possible to use the first piece of information to locate.
independently decodable samples Similarly when performing random access it may be necessary to locate. the previous sync point or random access recovery point and roll forward from the sync point or the pre roll. starting point of the random access recovery point to the desired point While rolling forward samples on. which no others depend need not be retrieved or decoded. The value of sample is depended on is independent of the existence of redundant codings However a. redundant coding may have different dependencies from the primary coding if redundant codings are. available the value of sample depends on documents only the primary coding. The size of the table sample count is taken from the sample count in the Sample Size Box stsz or. Compact Sample Size Box stz2,4 3 1 1 Syntax,aligned 8 class SampleDependencyTypeBox. extends FullBox sdtp version 0 0,for i 0 i sample count i. unsigned int 2 reserved 0,unsigned int 2 sample depends on. unsigned int 2 sample is depended on,unsigned int 2 sample has redundancy. 4 3 1 2 Semantics, sample depends on takes one of the following four values.
0 the dependency of this sample is unknown, 1 this sample does depend on others not an I picture. 2 this sample does not depend on others I picture,3 reserved. sample is depended on takes one of the following four values. 0 the dependency of other samples on this sample is unknown. 1 other samples depend on this one not disposable,2 no other sample depends on this one disposable. 3 reserved, sample has redundancy takes one of the following four values. 0 it is unknown whether there is redundant coding in this sample. 1 there is redundant coding in this sample,2 there is no redundant coding in this sample.
3 reserved,4 4 Sample groups,4 4 1 Introduction, This clause specifies a generic mechanism for representing a partition of the samples in a track A sample. grouping is an assignment of each sample in a track to be a member of one sample group based on a. ISO IEC 14496 15 2004 E, grouping criterion A sample group in a sample grouping is not limited to being contiguous samples and may. contain non adjacent samples As there may be more than one sample grouping for the samples in a track. each sample grouping has a type field to indicate the type of grouping For example a file might contain two. sample groupings for the same track one based on an assignment of sample to layers and another to sub. Sample groupings are represented by two linked data structures 1 a SampleToGroup box represents the. assignment of samples to sample groups 2 a SampleGroupDescription box contains a sample group. entry for each sample group describing the properties of the group There may be multiple instances of the. SampleToGroup and SampleGroupDescription boxes based on different grouping criteria These are. distinguished by a type field used to indicate the type of grouping. One example of using these tables is to represent the assignments of samples to layers In this case each. sample group represents one layer with an instance of the SampleToGroup box describing which layer a. sample belongs to For more details please refer to 5 3 12. 4 4 2 SampleToGroup Box,4 4 2 1 Definition,Box Type sbgp. Container Sample Table Box stbl,Mandatory No,Quantity Zero or more. This part of ISO IEC 14496 specifies the storage format for AVC ISO IEC 14496 10 ITU T Rec H 264 video streams The storage of AVC content uses the existing capabilities of the ISO Base Media File Format but also defines extensions to support the following features of the AVC codec

Related Books