Method and apparatus for data compression with reduced distortio

Details Method and apparatus for data compression with reduced distortio Method and apparatus for data compression with reduced distortio

1994-01-11

1995-09-12

Kostak, Victor R.

Television

Bandwidth reduction system

Data rate reduction

348419, H04N 713

Patent

active

054501326

ABSTRACT:
Apparatus for compressing data is disclosed in which input data is compressed by a vector quantization process and decoded by the vector quantization process. The input data and the decoded input data are compared and a difference signal as produced. A portion of the difference signal is preferably losslessly compressed and transmitted with the vector quantized input signal to a decoder over a communication channel. The decoder decodes the vector quantized portion of the signal and the compressed difference signal for reconstructing the input signal with an error which is less than that which would result from uncompensated vector quantization.

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Ziv, J. and Lempel, A., "A Universal Algorithm for Sequantial Data Compression", IEEE Transactions on Information Theory, pp. 337-343 (Jun. 1976).
Ziv, J., "On Universal Quantization", IEEE Transactions on Information Theory, vol. IT-31, No. 3 (May 1985).

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