Image information transmission system with compression based on

Details Image information transmission system with compression based on Image information transmission system with compression based on

1991-02-21

1991-08-13

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, H04N 713

Patent

active

050400606

ABSTRACT:
An image information transmission system for transmitting multi-pixel frames of image information, upon transmission, the data corresponding to a frame are divided into blocks each containing a predetermined number of pixel data, and discrimination data are prepared by discriminating whether each block belongs to a moving image area or a still image area of the frame. The data of a block of a moving image area are encoded using only the data of that block and according to a first encoding method, to form first encoded data. The data of a block of a still image area are encoded using the data of that block and those of other blocks, and according to a second encoding method, to form second encoded data. Transmission data are prepared from the encoded data and the discrimination data, and are sent to the transmission channel. At the receiving side, the encoded data and discrimination data are separated from the transmission data, and the encoded data are decoded either by a first or a second decoding method corresponding respectively to the first or a second decoding method, according to the separated discrimination data, to restore the original pixel data. This process reduces the amount of information to be transmitted while suppressing deterioration of the image information.

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patent: 4903124 (1990-02-01), Hoshi et al.

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