The authors develop a decoder/encoder system (transcoder) to solve the consumption constraint in the communications between end-user devices, when a new Wyner-Ziv (WZ)/H.264 framework is defined for being used in mobi...
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The authors develop a decoder/encoder system (transcoder) to solve the consumption constraint in the communications between end-user devices, when a new Wyner-Ziv (WZ)/H.264 framework is defined for being used in mobile-to-mobile environments. This approach is based on leaving to the devices only WZ video encoding and traditional video decoding;the lowest complexity algorithms in both paradigms. The system shifts the burden of complexity to the network, where an improved transcoder that reuses information between both paradigms is allocated. The WZ decoding motion vectors are used to reduce the H. 264 motion estimation process. The proposed transcoder offers a complexity reduction up to 60% on average, without any rate distortion drop.
This paper proposes a decoding system that reducers memory usage requirement by ten fold when decoding MPEG bitstreams. The system stores the anchor frames used in reconstructing, the P- and B- frames in compressed fo...
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ISBN:
(纸本)0780385268
This paper proposes a decoding system that reducers memory usage requirement by ten fold when decoding MPEG bitstreams. The system stores the anchor frames used in reconstructing, the P- and B- frames in compressed format, thereby allowing memory to be embedded within the decoder chip. A pseudo decoding, circuitry is used to extract relevant encoding parameters, a data analyzer is used to compute statistics and a pair of encoder and decoder is used to store decoded pixel data to memory buffer anchor frames and to convert encoded pixel data to suitable format for reconstructing-pictures in MPEG decoder.
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