Digital image coding using random scanning

Details Digital image coding using random scanning Digital image coding using random scanning

1990-03-15

1992-08-04

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, 358135, 358426, 3582613, 364725, H04N 712, H04N 713

Patent

active

051363712

ABSTRACT:
In a video signal coder blocks of pixels are generated, scanned in a pseudo-random order and transformed blocks of coefficients which are stored in a buffer. The resulting blocks of coefficients are quantized individually by the use of a quantization level and the coefficients of each block are individually quantized by the use of a quantization matrix. The quantization level is determined by the fullness of the buffer.

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