Television transmission system with differential encoding of tra

Details Television transmission system with differential encoding of tra Television transmission system with differential encoding of tra

1989-04-17

1990-08-28

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358135, H04N 7133

Patent

active

049530208

ABSTRACT:
In a television transmission system for digital picture signals each picture is divided into sub-pictures of N.times.N picture elements for the purpose of limiting the bit rate. Each sub-picture is subjected to a two-dimensional forward transform to determine coefficients. These coefficients are converted into a series of serially occurring coefficients in which the AC coefficients in this series are arranged in such a way that the magnitude variation of these AC coefficients in the series is monotonous. The magnitudes of the AC coefficients thus arranged are subjected to a differential encoding so that the difference between the magnitudes of two successive AC coefficients is transmitted instead of the magnitude of the AC coefficients themselves.

REFERENCES:
patent: 4831440 (1989-05-01), Borgers
patent: 4833535 (1989-05-01), Ozeki

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