Moving image signal encoding apparatus and decoding apparatus

Details Moving image signal encoding apparatus and decoding apparatus Moving image signal encoding apparatus and decoding apparatus

1990-05-11

1992-05-12

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, 358133, H04N 7133, H04N 7137

Patent

active

051132559

ABSTRACT:
A moving image signal encoding apparatus includes: a frame decimating circuit for extracting encoded frames from an input moving image signal at specified intervals; a frame interpolating circuit for obtaining an interpolated frame between the encoded frames, and a circuit for obtaining an error formed by frame interpolation. A moving image signal decoding apparatus includes: a receiving circuit for extracting a frame code from an inputted signal; a frame decoding circuit for decoding the frame code to obtain a reproduced frame, and a frame interpolating circuit for obtaining an interpolated frame between the reproduced frames. By transmitting an error of the interpolated frame from the encoding apparatus to the decoding apparatus and correcting the error of the interpolated frame with the decoding apparatus, the error of the interpolated frame is eliminated. Alternatively, depending on the value of the error of the interpolated frame obtained with the encoding apparatus, a circuit determines the operation mode as to whether the frame interpolating circuit of the decoder carries out frame interpolation or preceding value holding and sends a flag to show the operation mode to the decoder, so that improvement occurs when the error of the interpolated frame is large.

REFERENCES:
patent: 4383272 (1983-05-01), Netravali et al.
patent: 4727422 (1988-02-01), Hinman
patent: 4958226 (1990-09-01), Haskell

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