System comprisisng at least one encoder for coding a digital sig

Details System comprisisng at least one encoder for coding a digital sig System comprisisng at least one encoder for coding a digital sig

1993-03-08

1995-06-06

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348413, H04N 7133, H04N 7137

Patent

active

054226724

ABSTRACT:
An encoder for coding a digital signal comprises an encoder input for receiving the digital signal; a first data processor, having an input which is coupled to the encoder input, for generating a first coded digital signal at a first output of the first data processor; a first reduction device coupled to the encoder input, for reducing the received digital signal; a second data processor, having an input which is coupled to the first reduction device, for generating a second coded digital signal at a first output of the second data processor; a first encoder memory having an input which is coupled to a second output of the first data processor, and having an output which is coupled to the input of the first data processor; a second encoder memory having an input which is coupled to a second output of the second data processor, and having an output which is coupled to the input of the second data processor; and a first encoder prediction device having a first side which is coupled to the second output of the second data processor, and a second side which is coupled to both the input of the first encoder memory and the input of the first data processor. A decoder for decoding a digital signal which is encoded as described above, comprises a first data reprocessing device for processing a coded digital signal; and a decoder memory having an input which is coupled to an output of the first data reprocessing device.

REFERENCES:
patent: 4723161 (1988-02-01), Koga
patent: 4864396 (1989-09-01), Martens
patent: 4941042 (1990-07-01), Martens
"A Pyramid Image Coder Using Classified Transform Vector Quantization", S. Park et al, Jan. 22, 1991, pp. 25-41 of Signal Processing, European Journal.
Netherlands Search Report.

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