Title :
Video coding with adaptive block update
Author :
Kok, C.W. ; Chen, Tsuhan
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
Abstract :
The encoding mode selection issue in a multimode block based video coder is addressed. An adaptive strategy is proposed which exploits interframe correlation to achieve low bit rate coding while maintaining the image quality. Interframe intensity matching is proposed to minimize `Intensity Blocking´ in selecting the encoding mode. Further bit rate reduction is achieved by nonuniform weight assignment in different encoding modes. The proposed strategy has been integrated with the ITU-T H.263 video coding standard. Promising results in reducing the bit rate and blocking artifacts are obtained when compared with the test model (TMN 6) of H.263
Keywords :
adaptive codes; block codes; correlation methods; telecommunication standards; video coding; ITU-T H.263 coding standard; adaptive block update; adaptive strategy; bit rate reduction; blocking artifacts; encoding mode selection; encoding modes; image quality; interframe correlation; interframe intensity matching; multimode block based video coder; nonuniform weight assignment; test model; video coding; Bit rate; Code standards; Decoding; Discrete cosine transforms; Encoding; Filters; Frequency; Layout; Quantization; Video coding;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.621953
