Adaptive predictive encoder

Details Adaptive predictive encoder Adaptive predictive encoder

1976-12-01

1978-06-06

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, 325 38B, H04N 712

Patent

active

040939626

ABSTRACT:
In a predictive encoder, a predictive error signal is multiplied in effect by a controllable factor before quantized into information codes. A variable length coder converts the information codes into variable length codes, which are temporarily stored in a buffer memory for transmission to a receiver at a predetermined bit rate. The controllable factor is controlled by buffer occupancy of the buffer memory. Normally, the factor may be 1/2. The factor is decreased when the buffer occupancy increases towards overflow.

REFERENCES:
patent: 3403226 (1968-09-01), Wintringham
patent: 3422227 (1969-01-01), Brown
patent: 3439753 (1969-04-01), Mounts
patent: 3984626 (1976-10-01), Mounts
patent: 4023199 (1977-05-01), Netravali

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