Picture signal processor, picture signal coder and picture signa

Details Picture signal processor, picture signal coder and picture signa Picture signal processor, picture signal coder and picture signa

1988-10-18

1991-07-02

Peng, John K.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, 358136, 375 27, H04N 718, H04N 712

Patent

active

050289950

ABSTRACT:
An image signal processor in which the conversion process of a picture signal is performed in block unit, not in frame unit, and in order to raise the speed of the process, besides an orthogonal transform matrix, the products between the orthogonal transform matrix and matrices for realizing picture resolution conversion, image manipulation processes such as expansion, compression and rotation, and various kinds of linear filtering are provided in a coefficient memory as new transform matrices, and these transform matrices are properly changed-over in accordance with the content of the pertinent transform, thereby to perform an orthogonal transform or an inverse orthogonal transform.

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patent: 4672441 (1987-06-01), Hoelzlwimmer et al.
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patent: 4723161 (1988-02-01), Koga
patent: 4757383 (1988-07-01), Tanaka
patent: 4816906 (1989-03-01), Kummerfeldt et al.
patent: 4821119 (1989-04-01), Gharavi
patent: 4833535 (1989-05-01), Ozeki et al.

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