Title :
Perceived Audiovisual Quality of Low-Bitrate Multimedia Content
Author :
Winkler, Stefan ; Faller, Christof
Author_Institution :
Nat. Univ. of Singapore
Abstract :
This paper studies the quality of multimedia content at very low bitrates. We carried out subjective experiments for assessing audiovisual, audio-only, and video-only quality. We selected content and encoding parameters that are typical of mobile applications. Our focus were the MPEG-4 AVC (a.k.a. H.264) and AAC coding standards. Based on these data, we first analyze the influence of video and audio coding parameters on quality. We investigate the optimal trade-off between bits allocated to audio and to video under global bitrate constraints. Finally, we explore models for the interactions between audio and video in terms of perceived audiovisual quality
Keywords :
audio coding; multimedia computing; video coding; visual perception; AAC coding standard; MPEG-4 AVC; audio coding; audio-only quality assessment; audiovisual quality assessment; low-bitrate multimedia content; mobile application; multimedia perception; video coding; video-only quality assessment; Audio coding; Automatic voltage control; Bit rate; Codecs; Data analysis; Encoding; MPEG 4 Standard; Materials testing; Speech analysis; Video compression; Audiovisual quality assessment; multimedia perception; subjective experiments;
Journal_Title :
Multimedia, IEEE Transactions on
DOI :
10.1109/TMM.2006.879871
