Orthogonal transform coding apparatus

Details Orthogonal transform coding apparatus Orthogonal transform coding apparatus

1991-08-06

1994-10-11

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348397, 348408, 348420, H04N 7133

Patent

active

053551672

ABSTRACT:
In an orthogonal transfrom coding apparatus for performing high efficiecy coding using orthogonal transformation, a plurality of quantizers are provided; the coded amount of data of the plurality of quantizers are respectively calculated; an optimum quantizer to make the amount of data less than a specific value is selected to quantize the coded amount of data, and the quantized values are encoded in a variable-length form and the transmitted.

REFERENCES:
patent: 4821119 (1989-04-01), Gharavi
patent: 5073821 (1991-12-01), Juri
patent: 5109451 (1992-04-01), Aono
"Adaptive Image Data Compression", Zuniga et al., 1979 IEEE, pp. 583-590.
"Rate Adaptive Communication", Andrew G. Tescher, The Aerospace Corp. NTC 1978 Nat. Telecommunications Cnoference, pp. 19.1.1-19.1.6.

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