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1.5. MPEG-4 Schedule

After the initial study phase, in which the major MPEG-4 objectives were identified, notably through the functionalities presented earlier, the first MPEG-4 call for proposals was issued in July 1995 [N998] and answers were received by September/October 1995. The call for proposals asked for relevant video and audio technology addressing the eight MPEG-4 functionalities as described in the MPEG-4 Proposal Package Description [N998]. The technology received was evaluated using subjective tests for complete algorithms and expert panels for single tools [N999]. In the case of algorithms addressing the eight MPEG-4 functionalities, three functionalities (one for each of the three classes) were selected as representative—content-based scalability, improved compression efficiency, and robustness in error-prone environments—and formal subjective tests were conducted for those. For the other five functionalities, proposals were evaluated by expert panels (in the same manner as tools), and the corresponding selected tools were thoroughly examined using the CE procedure.

The video subjective tests were performed in November 1995 at Hughes Aircraft Company, in Los Angeles; the audio subjective tests were performed in December 1995 at CCETT, Mitsubishi, NTT, and Sony. The video expert panels evaluation was performed in October 1995 and January 1996.


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