Title :
H.263-based SNR scalable video codec
Author :
Lee, B.R. ; Park, K.K. ; Hwang, J.J.
Author_Institution :
Dept. of Multimedia, Electron. & Telecommun. Res. Inst., South Korea
fDate :
8/1/1997 12:00:00 AM
Abstract :
We propose a H.263-based video coder with two-layer SNR scalability. The base layer is coded by using the default H.263 coding algorithms to achieve high compressed video data and the enhanced layer is coded by advanced coding such as HVS-based quantization updating. The enhanced layer contains only coded refinement data for the DCT coefficients of the base layer. Bitstream syntax and semantics for enhancement layer are designed and quantizer design using the HVS is proposed. Data from the two layers are combined after inverse quantization processes and inverse DCT coefficients by adding in the decoder
Keywords :
code standards; data compression; discrete cosine transforms; inverse problems; quantisation (signal); telecommunication standards; transform coding; video codecs; video coding; DCT coefficients; H.263 coding algorithms; HVS based quantization updating; SNR scalable video codec; base layer; bit stream semantics; bit stream syntax; coded refinement data; compressed video data; decoder; enhanced layer; inverse DCT coefficients; inverse quantization; quantizer design; two-layer SNR scalability; Bandwidth; Decoding; Discrete cosine transforms; Quantization; Scalability; Spatial resolution; Video codecs; Video coding; Video compression; Videoconference;
Journal_Title :
Consumer Electronics, IEEE Transactions on
