ISO/IEC 13818-1:2022

مواصفة قياسية دولية   الإصدار الحالي
اعتمدت بتاريخ  30 سبتمبر 2022

Information technology — Generic coding of moving pictures and associated audio information — Part 1: Systems

ملفات الوثيقة ISO/IEC 13818-1:2022

null صفحات
الإصدار الحالي

مجال الوثيقة ISO/IEC 13818-1:2022

This document specifies the system layer of the coding. It was developed principally to support the combination of the video and audio coding methods defined in Parts 2 and 3 of ISO/IEC 13818. The system layer supports six basic functions:
1) the synchronization of multiple compressed streams on decoding;
2) the interleaving of multiple compressed streams into a single stream;
3) the initialization of buffering for decoding start up;
4) continuous buffer management;
5) time identification;
6) multiplexing and signalling of various components in a system stream.
A Rec. ITU-T H.222.0 | ISO/IEC 13818-1 multiplexed bit stream is either a transport stream or a program stream. Both streams are constructed from PES packets and packets containing other necessary information. Both stream types support multiplexing of video and audio compressed streams from one program with a common time base. The transport stream additionally supports the multiplexing of video and audio compressed streams from multiple programs with independenttime bases. For almost error-free environments the program stream is generally more appropriate, supporting software processing of program information. The transport stream is more suitable for use in environments where errors are likely.
A Rec. ITU-T H.222.0 | ISO/IEC 13818-1 multiplexed bit stream, whether a transport stream or a program stream, is constructed in two layers: the outermost layer is the system layer, and the innermost is the compression layer. The system layer provides the functions necessary for using one or more compressed data streams in a system. The video and audio parts of this Specification define the compression coding layer for audio and video data. Coding of other types of data is not defined by this Specification, but is supported by the system layer provided that the other types of data adhere to the constraints defined in 2.7.

الأكثر مبيعاً

GSO 150-2:2013
 
مواصفة قياسية خليجية
فترات صلاحية المنتجات الغذائية - الجزء الثاني : فترات الصلاحية الاختيارية
OS GSO 150-2:2013
GSO 150-2:2013 
مواصفة قياسية عمانية
فترات صلاحية المنتجات الغذائية - الجزء الثاني : فترات الصلاحية الاختيارية
OS GSO 150-1:2013
GSO 150-1:2013 
مواصفة قياسية عمانية
فترات صلاحية المنتجات الغذائية - الجزء الأول : فترات الصلاحية الإلزامية
GSO 150-1:2013
 
لائحة فنية خليجية
فترات صلاحية المنتجات الغذائية - الجزء الأول : فترات الصلاحية الإلزامية

اعتمدت مؤخراً

ISO 3262-6:2022
 
مواصفة قياسية دولية
Extenders — Specifications and methods of test — Part 6: Precipitated calcium carbonate
ISO 10447:2022
 
مواصفة قياسية دولية
Resistance welding — Testing of welds — Peel and chisel testing of resistance spot and projection welds
ISO 18314-5:2022
 
مواصفة قياسية دولية
Analytical colorimetry — Part 5: Procedure for colorimetric determination of colour differences of object colours according to equidistant colour spaces
ISO 7097-2:2022
 
مواصفة قياسية دولية
Nuclear fuel technology — Determination of uranium in solutions, uranium hexafluoride and solids — Part 2: Iron(II) reduction/cerium(IV) oxidation titrimetric method