Method and apparatus for encoding an image signal using a multi-

Details Method and apparatus for encoding an image signal using a multi- Method and apparatus for encoding an image signal using a multi-

1993-02-19

1995-04-04

Chin, Tommy P.

Television

Bandwidth reduction system

Data rate reduction

348 27, H04N 7133

Patent

active

054041686

ABSTRACT:
A quantizing number is determined using multiple stages of code amount estimating circuits. Thus, an optimum quantizing number may be selected from among a number of quantizing numbers which is not limited to the number of code amount estimating circuits. The optimum quantizing number is used to quantize a set of blocks of orthogonally transformed image data. The quantized data are encoded using a variable length code. The optimum quantizing number is the one which results in the greatest amount of data that is within a predetermined threshold, permitting an amount of encoded data to be recorded on a magnetic tape in a fixed format.

REFERENCES:
patent: 5144424 (1992-09-01), Savatier
patent: 5157488 (1992-10-01), Pennebaker
patent: 5231484 (1993-07-01), Gonzales et al.

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