1、C:DOCUMENTS AND SETTINGSQGV33745MY DOCUMENTSDOWNLOADSR-QUE-SG06.99-1998-MSW-E.DOC 22.10.03 15.07.10 QUESTION ITU-R 99/6 Relationship between quality, quality evaluation methodology, and type of application, in a multimedia environment (1998) The ITU Radiocommunication Assembly, considering a) that a
2、 wide range of media delivery systems are available today, or are becoming available, for the broadcaster, including Internet itself, what may be called “Internet television“, packaged media, etc.; b) that such media delivery systems will provide a range of entertainment, educational, and informatio
3、n services; c) that the media delivery systems will be used in a range of viewing environments from personal computers to large screen televisions; d) that multimedia packages can be considered as “applications“. The “application“ is a collection of interconnected video, text, audio, and graphics it
4、ems that can be viewed as a unity, and may use interactivity; e) that applications will have different purposes, that will be intended to help, or stimulate the user, to perform certain actions, or for enjoyment; f) that the evolution of compression technologies and the availability of new delivery
5、systems impacts quality of service, decides that the following Question should be studied 1 What guidelines can be given for the relationship between quality requirements and multimedia applications provided by broadcasters? 2 What evaluation methodologies can be applied to appraise the successfulne
6、ss of multimedia delivery systems for different applications? 3 What relative priority should be given to parameters such as access time, quality of video and audio quality, level of interactivity, navigability of multimedia, for the delivery of multimedia applications? 4 What will be the respective
7、 weighting of video, audio and interactivity on the overall perception of quality? 5 What subjective and objective quality evaluation methodologies and environments (e.g. lighting conditions, viewing distances, contextual effects) should be used or defined to allow the identification of multimedia a
8、udiovisual and interactivity quality parameters? 6 What methodologies already described in Recommendation ITU-R BT.500 could be used, with adaptation of application specific stimuli, viewing conditions and viewer instructions? 7 What is the quality versus bit rate versus content trade-off currently
9、achievable with representative multimedia equipment (e.g. hardware or real time software decoders) using the different encoding techniques applied for the different delivery systems? - 2 - 6/1-E C:DOCUMENTS AND SETTINGSQGV33745MY DOCUMENTSDOWNLOADSR-QUE-SG06.99-1998-MSW-E.DOC 22.10.03 15.07.10 further decides 1 that the results of the above studies should be included in (a) Recommendation(s); 2 that the above studies should be completed by 2006. _
