Method and device for compressing digital data

Details Method and device for compressing digital data Method and device for compressing digital data

1996-12-30

1998-06-16

Ramirez, Ellis B.

G06F 1700

Patent

active

057685347

ABSTRACT:
A data compression device having a decorrelation circuit (10), a circuit (12) for quantizing the decorrelated data and a control circuit (13) acting on the quantization step. The device includes is a circuit for calculating a histogram of the decorrelated data and for calculating the quantization step on the basis of this histogram (11) in order to force, in accordance with the coherence of the histogram, this quantization step. The latter is calculated on the basis of the distances between the local maximum values of the histogram.

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patent: 4920426 (1990-04-01), Hatori et al.
patent: 5335016 (1994-08-01), Nakagawa
patent: 5412429 (1995-05-01), Glover
patent: 5426517 (1995-06-01), Schwartz
patent: 5463702 (1995-10-01), Trueblood
patent: 5469212 (1995-11-01), Lee
patent: 5574503 (1996-11-01), May
Error Accumulation of Repetitive Image Coding by Shih-Fu Chang & Alexandros Eleftheriadis May 30, 1994, pp. 201-204.

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