DocumentCode :
44253
Title :
A complexity-scalable hybrid H.264/AVC-to-SVC transcoder
Author :
Van Leuven, Sebastiaan ; De Cock, Jan ; Van Wallendael, Glenn ; Garrido-Cantos, R. ; Van de Walle, Rik
Author_Institution :
Dept. of Electron. & Inf. Syst., iMinds, Ghent Univ., Ghent, Belgium
Volume :
59
Issue :
3
fYear :
2013
fDate :
Aug-13
Firstpage :
672
Lastpage :
680
Abstract :
Transcoding of H.264/AVC bitstreams is frequently used for adapting video streams to varying network conditions or different end-user device characteristics. Transcoding requires a relatively high complexity (and thus high operational cost) for each adaptation operation, and possibly reduces the video quality. In comparison, transcoding the input bitstream to SVC requires only one adaptation step. Afterwards, the resulting SVC bitstream can be adapted instantly. To reduce the H.264/AVC-to-SVC transcoding complexity, a transcoding architecture which combines existing open-loop transcoding techniques with optimized closed-loop transcoding is proposed. Furthermore, this approach allows to scale the complexity of the system. Doing so, compared with a cascaded decoder-encoder only 8.48% of the complexity is required for the highest complexity, while a high rate-distortion efficiency is maintained and a high degree of scalability is guaranteed. When only limited resources are available, the transcoding complexity can be scaled such that over 99% of the complexity is reduced compared to a cascaded decoder-encoder.
Keywords :
decoding; transcoding; video coding; video streaming; H.264-AVC bitstream transcoding complexity; SVC bitstream; adaptation operation; bitstream transcoding; cascaded decoder-encoder; complexity-scalable hybrid H.264-AVC-to-SVC transcoder; end-user device characteristics; open-loop transcoding technique; operational cost; optimized closed-loop transcoding; rate-distortion efficiency; system complexity; transcoding complexity; varying-network condition; video quality; video streams; Bit rate; Complexity theory; Scalability; Static VAr compensators; Transcoding; Video coding; CGS; H.264/AVC-to-SVC transcoding; complexity scalability; hybrid transcoding;
fLanguage :
English
Journal_Title :
Consumer Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0098-3063
Type :
jour
DOI :
10.1109/TCE.2013.6626255
Filename :
6626255
Link To Document :
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