標題: ENHANCEMENT OF IMAGE QUALITY FOR LOW BIT RATE VIDEO CODING
作者: NGAN, KN
LIN, DW
LIOU, ML
交大名義發表
National Chiao Tung University
公開日期: 1-十月-1991
摘要: CCITT Recommendation H.261 on coding for visual telephony is applicable to bit rates of p X 64 kbits/s, where p = 1,2,..., 30. It generally performs well over the intended bit rates. However, at the very low rates of 64 and 128 kbits/s, it suffers from visual degradation due to coarse quantization. In this paper, we studied the various approaches or combinations of them to improve the image quality. Methods studied include reducing the quantizer step size, randomized scanning of the macroblocks, and/or nonuniform quantization of the transform coefficients.
URI: http://dx.doi.org/10.1109/31.97543
http://hdl.handle.net/11536/3664
ISSN: 0098-4094
DOI: 10.1109/31.97543
期刊: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS
Volume: 38
Issue: 10
起始頁: 1221
結束頁: 1225
顯示於類別:期刊論文


文件中的檔案:

  1. A1991GJ76000012.pdf