Hybrid coding system for moving image

Details Hybrid coding system for moving image Hybrid coding system for moving image

1991-03-01

1992-05-26

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, 358136, 382 56, 382 50, H04N 712, H04N 713

Patent

active

051172879

ABSTRACT:
A moving image is coded through a waveform coding predictor (2), and a model-based coding predictor (3) which is mainly applicable to a head portion of a person, the coded outputs of said two predictors are compared (5) with an input current image for each block element which has for instance 8.times.8 or 16.times.16 pixels. A block element coded for the smaller difference from an input current image is taken, and is transmitted to a receiving side through differential coding (6,7). As the information compression ratio is high, a moving image can be transmitted through conventional telephone line, or a narrow band circuit.

REFERENCES:
patent: 4796087 (1989-01-01), Guichard et al.
patent: 4922341 (1990-05-01), Strobach
patent: 4951140 (1990-08-01), Ueno et al.
patent: 4999705 (1991-03-01), Puri et al.
CS89-82--"A Hybrid Coding Method of Analysis Parameters and Waveform in Image Data Compression"--Institute of Electronics, Information and Communication Engineers in Japan, Nov. 1989.
B-I, vol. J72-B-I, No. 3, pp. 200-207, Mar. 1989--"A Model-Based Analysis Synthesis Image Coding Scheme"--Institute of Electronics, Information and Communication Engineers in Japan.
IE89-3--"Estimation of 3-D Motion of Head from Moving Facial Images"--Institute of Electronics, Information and Communication Engineers in Japan, Apr. 1989.

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