Digital communication system and method of compressing informati

Details Digital communication system and method of compressing informati Digital communication system and method of compressing informati

1994-06-29

1997-09-09

Chin, Shephen

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

371 434, 371 436, H04B 166

Patent

active

056663803

ABSTRACT:
A digital communication system and method, in which a convolutional coding of input data sequence Bm (m=1, 2, 3, . . . ) is carried out, and first coded data X1 of first coded data sequence Xm are deleted to output second coded data sequence Xn onto a transmission line. First receive data X1' are uniquely determined on the basis of receive data sequence Xn' transmitted via the transmission line, corresponding to the second coded data sequence Xn, and the last decoded data B0' of a data sequence which is previously received and decoded, to produce data sequence Xm' which are decoded by a maximum likelihood coding to obtain a decoded data sequence. Hence, a fixed amount of information of the data can be always compressed to transmit the compressed data even in a low line quality environment.

REFERENCES:
patent: 4462101 (1984-07-01), Yasuda et al.
patent: 5117427 (1992-05-01), Miyake et al.

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