June 2014
Beginner to intermediate
464 pages
16h 9m
English
Content preview from Fundamentals and Evolution of MPEG-2 Systems: Paving the MPEG Road
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6Principles Underlying the MPEG-2 Systems Design
The important issues to solve when designing an MPEG system that enables a high Quality of Service. How to achieve a constant end-to-end delay, given the delays due to video coding, audio coding and packetization of video and audio. How buffers are required to multiplex video and audio into a single system stream. The delay caused by a multiplex and demultiplex operation and the video and audio data flow through the buffers. How to synchronize video and audio at players and how to model the decoding process, so that the required buffer resources for players can be specified accurately. How compliancy of streams and players to MPEG-2 Systems can be specified unambiguously. The important timing issues in the design of MPEG-2 systems. Use of a system clock at encoder and decoder and how to convey its value in a stream. Frequency and tolerance of the system clock in MPEG-1 and in MPEG-2 systems. Regeneration of the system clock in a player. How to ensure a high Quality of Service and the importance of transport layer independency.
When designing MPEG-1 and MPEG-2 Systems, the obvious driving concern for the MPEG System experts has been ‘how to make MPEG video and audio work’ for all target applications. To reach this goal, it has been crucial to achieve a common understanding on a number of important considerations that ultimately govern the design of MPEG Systems. This chapter discusses these design considerations.
6.1 Building ...
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