標題: Scalable Video Coding Shown to be State of the Art [打印本頁] 作者: masonchung 時間: 2008-3-17 11:00 PM 標題: Scalable Video Coding Shown to be State of the Art Scalable video coding (SVC) was developed by the Joint Video Team (JVT) of ISO/IEC MPEG &" A# o1 x1 {+ X8 O1 q/ G
ITU-T VCEG in a standardization project completed in October 2007. The SVC enhancement of ' g+ k1 x; w. Q8 R9 L Cthe AVC core design includes the specification of three scalable profiles (the Scalable Baseline,& z8 T3 T0 N6 e" l$ A" }% h
Scalable High, and Scalable High Intra profiles). It enables the construction of SVC bitstreams that* S5 M. N* j2 S( e8 H' h+ E
contain reduced bit rate substreams. The substreams can be extracted from the complete bitstream, & ~# z, a5 L3 Kthereby providing scalability in terms of bit rate, decoding complexity, and frame rate, spatial / q6 H. D) ^, d3 m+ J2 Nresolution, or quality. In typical cases, one or more of the substreams of the SVC bitstream will be - O. i" ~. g# b& \8 \fully compatible with ordinary AVC decoders. Frame rate scalability (also known as temporal . [% l$ M; @" v0 U! v% nscalability) or spatial scalability refers to the presence of a substream with a lower sampling rate 6 V5 u2 ]0 \3 } T! f7 sthan the overall bitstream in terms of time or spatial resolution. Quality scalability refers to the0 N0 D# z* `/ Y' h7 S, T
presence of a substream with the same sampling rate as the parent SVC stream, but having a lower& j& }( J$ d% y7 \. B
bit rate with a correspondingly lower quality. % S/ q0 i; E' n0 R+ k: n7 q+ E$ v) F% L% ^1 V
[attach]3234[/attach] # D& x& `) `1 d% \4 E ( j9 H: w* ?9 W7 Y$ C( K/ S3 [. O& G4 l[ 本帖最後由 masonchung 於 2008-4-12 11:09 PM 編輯 ]作者: divl 時間: 2008-12-2 10:43 AM
Scalable Video Coding在未來網路通訊上勢必將掀起一股革命，% E8 ]/ B8 M7 q& H0 `
許多視訊影像實驗室、研究單位無不於此衍伸發展，感謝版主分享此文件， ( W! q+ v1 G" L; y讓需要認識、了解此種技術的同好們可以獲得良好的資訊。