Setting quantization level to match DCT coefficients

Details Setting quantization level to match DCT coefficients Setting quantization level to match DCT coefficients

1995-05-12

1998-05-19

Coleman, Eric

395523, G06F 1700

Patent

active

057547424

ABSTRACT:
A computer-implemented method and apparatus for processing signals. According to a preferred embodiment, a rate controller determines an initial quantization level for quantizing a block of coefficient signals representative of an image, wherein coefficient signals quantized with a given quantization level are associated with a quantization error. At least one new quantization level is generated in accordance with the initial quantization level. The quantization error associated with the initial quantization level and the at least one new quantization level is determined. A quantization level is selected from the initial quantization level and the at least one new quantization level in accordance with this determination.

REFERENCES:
patent: 5533138 (1996-07-01), Kim
patent: 5535019 (1996-07-01), Eschbach
patent: 5539662 (1996-07-01), Nickerson
patent: 5561464 (1996-10-01), Park
patent: 5561719 (1996-10-01), Sugahara

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