Post by Lee Smith on Apr 4, 2004 7:44:51 GMT -5
Check out this website for more details concerning MPEG4 and the difference between it with MPEG1 and MPEG2 video (editing)
wwwam.hhi.de/mpeg-video/#MPEG4
Some important bits here:-
The MPEG-4 Video Coding Standard
Anticipating the rapid convergence of telecommunications industries, computer and TV/film industries, the MPEG group officially initiated a new MPEG-4 standardization phase in 1994 - with the mandate to standardize algorithms and tools for coding and flexible representation of audio-visual data to meet the challenges of future Multimedia applications and applications requirements. In particular MPEG-4 addresses the need for
Universal accessibility and robustness in error prone environments - Multimedia audio-visual data need to be transmitted and accessed in heterogeneous network environments, possibly under severe error conditions (e.g. mobile channels). Although the MPEG-4 standards will be network (physical-layer) independent in nature, the algorithms and tools for coding audio-visual data need to be designed with awareness of network peculiarities.
High interactive functionality - Future Multimedia applications will call for extended interactive functionalities to assist the user's needs. In particular the flexible, highly interactive access to and manipulation of audio-visual data will be of prime importance. It is envisioned that - in addition to conventional playback of audio and video sequences - the user need to access "content" of audio-visual data to present and manipulate/store the data in a highly flexible way.
Coding of natural and synthetic data - Next generation graphics processors will enable Multimedia terminals to present both pixel based audio and video data together with synthetic audio/speech and video in a highly flexible way. MPEG-4 will assist the efficient and flexible coding and representation of both natural (pixel based) as well as synthetic data.
Compression efficiency - For the storage and transmission of audio-visual data a high coding efficiency, meaning a good quality of the reconstructed data, is required. Improved coding efficiency, in particular at very low bit rates below 64 kbits/s, continues to be an important functionality to be supported by the MPEG-4 video standard.
Bit rates targeted for the MPEG-4 video standard are between 5-64 kbits/s for mobile or PSTN video applications and up to 2 Mbits/s for TV/film applications. Seven new (with respect to existing or emerging standards) key video coding functionalities have been defined which support the MPEG-4 focus and which provide the main requirements for the work in the MPEG video group. The requirements cover the main topics related to "Content-Based Interactivity”, "Compression” and "Universal Access”. The release of the MPEG-4 International Standard is targeted for July 1998.
wwwam.hhi.de/mpeg-video/#MPEG4
Some important bits here:-
The MPEG-4 Video Coding Standard
Anticipating the rapid convergence of telecommunications industries, computer and TV/film industries, the MPEG group officially initiated a new MPEG-4 standardization phase in 1994 - with the mandate to standardize algorithms and tools for coding and flexible representation of audio-visual data to meet the challenges of future Multimedia applications and applications requirements. In particular MPEG-4 addresses the need for
Universal accessibility and robustness in error prone environments - Multimedia audio-visual data need to be transmitted and accessed in heterogeneous network environments, possibly under severe error conditions (e.g. mobile channels). Although the MPEG-4 standards will be network (physical-layer) independent in nature, the algorithms and tools for coding audio-visual data need to be designed with awareness of network peculiarities.
High interactive functionality - Future Multimedia applications will call for extended interactive functionalities to assist the user's needs. In particular the flexible, highly interactive access to and manipulation of audio-visual data will be of prime importance. It is envisioned that - in addition to conventional playback of audio and video sequences - the user need to access "content" of audio-visual data to present and manipulate/store the data in a highly flexible way.
Coding of natural and synthetic data - Next generation graphics processors will enable Multimedia terminals to present both pixel based audio and video data together with synthetic audio/speech and video in a highly flexible way. MPEG-4 will assist the efficient and flexible coding and representation of both natural (pixel based) as well as synthetic data.
Compression efficiency - For the storage and transmission of audio-visual data a high coding efficiency, meaning a good quality of the reconstructed data, is required. Improved coding efficiency, in particular at very low bit rates below 64 kbits/s, continues to be an important functionality to be supported by the MPEG-4 video standard.
Bit rates targeted for the MPEG-4 video standard are between 5-64 kbits/s for mobile or PSTN video applications and up to 2 Mbits/s for TV/film applications. Seven new (with respect to existing or emerging standards) key video coding functionalities have been defined which support the MPEG-4 focus and which provide the main requirements for the work in the MPEG video group. The requirements cover the main topics related to "Content-Based Interactivity”, "Compression” and "Universal Access”. The release of the MPEG-4 International Standard is targeted for July 1998.