Image compression method for bit-fixation and the apparatus ther

Details Image compression method for bit-fixation and the apparatus ther Image compression method for bit-fixation and the apparatus ther

1993-05-27

1995-05-16

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Auxiliary signal

358426, 348384, H04N 1415

Patent

active

054166047

ABSTRACT:
An image compression and expansion methods for bit-rate fixation and the apparatus therefor in a video image apparatus which compresses the input image signal by performing a discrete cosine transform operation, quantizing, and variable-length-encoding the original image for each block respectively in order to enhance the compression efficiency. Thus, the number of bits can be effectively fixed by placing inter-screen differential distortions and periodically varying in a preset period the positions of distortions when variable-length-encoding the respective pictures of the successive pictures with respect to a still image.

REFERENCES:
patent: 5021891 (1991-06-01), Lee
patent: 5065447 (1991-11-01), Barnsley et al.
patent: 5146324 (1992-09-01), Miller et al.
patent: 5231484 (1993-07-01), Gonzales et al.

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