Orthogonal transform coding apparatus for reducing the amount of

Details Orthogonal transform coding apparatus for reducing the amount of Orthogonal transform coding apparatus for reducing the amount of

1990-06-08

1991-12-17

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 13, 358135, H04N 713

Patent

active

050738216

ABSTRACT:
An orthogonal transform coding device assembles sample values of the input signals and forms a large block. The large block is divided into a plurality of small blocks and the sample values are subjected to the orthogonal transform coding for every small block. A plurality of quantizers are provided for the orthogonal transformed components and the data amount after coding when the quantization performed by the respective quantizers is estimated, whereby the optimum quantizers are selected for the respective small blocks according to the estimated value.

REFERENCES:
patent: 4234767 (1988-03-01), Kaneko et al.
patent: 5006929 (1991-04-01), Barbero

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