Moving picture image encoder with continuously changing quantiza

Details Moving picture image encoder with continuously changing quantiza Moving picture image encoder with continuously changing quantiza

1992-02-07

1993-12-28

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358133, H04N 7137, H04N 7133

Patent

active

052744434

ABSTRACT:
A moving picture image encoding device comprises a DCT circuit for coding an input image signal, a quantization circuit for quantizing an output signal of the DCT circuit, a variable length coding circuit for coding an output signal of the quantization circuit, a buffer memory for temporarily storing codes output from the variable length coding circuit, and a quantization control circuit for controlling the quantization step size according to the buffer content of the buffer memory. The quantization control circuit decrements the quantization step size by a predetermined quantity every frame period or increments the quantization step size by a predetermined quantity every block period when a parameter value related to the buffer content is not less than a preset value.

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