Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1996-10-23
2000-12-12
Britton, Howard W.
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
37524016, 37524019, H04N 750
Patent
active
061608467
ABSTRACT:
A method and apparatus for selecting a quantizer scale for each macroblock to maintain the overall quality of the video image while optimizing the coding rate. A quantizer scale is selected for each macroblock such that target bit rate for the picture is achieved while an optimal quantization scale ratio is maintained for successive macroblocks to produce a uniform visual quality over the entire picture. One embodiment applies the method to the frame level while another embodiment applies the method in conjunction with a wavelet transform.
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Copy of International Search Report dated Feb. 19, 1997, from corresponding international application.
Chiang Tihao
Chien Max
Kwok Wilson
Sun Huifang
Zhang Ya-Qin
Britton Howard W.
Purke William J.
Sarnoff Corporation
Sharp Corporation
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