Signal compression device

Details Signal compression device Signal compression device

1996-06-20

1998-06-30

Couso, Jose L.

Image analysis

Image compression or coding

Adaptive coding

382232, 382248, G06K 936, G06K 946

Patent

active

057745943

ABSTRACT:
Blocking means subjects pixel information of an original sample surface to blocking, a DCT circuit transforms the blocks of input data, a quantizer quantizes the DCT-treated data, a VLC circuit subjects the quantized data to variable-length coding, and a measuring circuit measures the code length based on the quantized data. Variable-length coded data or input sample data is selected in accordance with an output from the measuring circuit so that when the variable-length code content after entropy coding is greater than the data content of unit input sample surface, the input sample data itself, instead of the variable-length coded data, may used as data to be compressed, whereby the average code content is reduced.

REFERENCES:
patent: 5416604 (1995-05-01), Park
patent: 5553160 (1996-09-01), Dawson

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