Objectif
COMIS aimed to define an efficient video coding algorithm and a conceptual design of the LSI which would allow implementation of a simple decoder for office and home applications, capable of accessing moving-image information recorded on a variety of digital storage media. The availability of a standard would spur a wide range of applications in different areas, such as entertainment, education, and training, as well as in the office.
Coding moving images on digital storage media (COMIS) is directly related to International Standards Organisation (ISO) activities for the definition of a standard for the coded representation of moving image information on digital storage media, and provides a support for coordinated European participation and proposals. The project is made possible by the concurrent evolution of some key technologies such as those of digital storage, video coding and very large scale integration (VLSI).
The aim of the standard for coding moving images on digital storage (COMIS) project was to define an efficient video coding algorithm and a conceptual design of the large scale integration (LSI) which would allow implementations of a simple decoder for office and home applications, capable of accessing moving image information recorded on a variety of digital storage media.
COMIS has made a significant contribution to an International Standard Organization (ISO) Draft International Standard entitled Coding of Moving Pictures and Associated Audio for Digital Storage Media up to about 1.5 Mbit/s, and has produced the following additional results:
a simulation model yielding good quality coded pictures;
a hardware reference model for the successive phases of conceptual very large scale integration (VLSI) design;
the specification of a real time demonstrator able to decode ISO Moving Picture Expert Group (MPEG) audiovisual sequences at a bit rate of about 1 Mbit/s;
the demonstration of a real time terminal playing 30 in of audiovisual material coded and multiplexed according to the ISO/MPEG standard and stored on a multimedia workstation based on a personal computer, PC/AT.
Work is now in progress on producing 30 min of audiovisual material coded according to the ISO MPEG standard and stored on a multimedia workstation.
The goals of the project were to:
- define an algorithm for the efficient coding of moving pictures for digital storage media having the following properties:
. target throughput rate of 1-1.5 Mbit/s, typical of the most common digital storage media such as compact disc and DAT
. high picture quality
. compatible with telecommunication standards (CCITT Recommendation H.261 for videoconferencing and visual telephony)
- define the conceptual VLSI design of the chips implementing the standard
- coordinate European participation in the relevant standardisation body, ISO/IEC JTC 1/SC2/WG11: this working group is in charge of developing international standards for coding moving picture images, associated audio and their combination when used for storage and retrieval on digital media.
Thème(s)
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10148 TORINO
Italie