Two dimensional coding apparatus

Details Two dimensional coding apparatus Two dimensional coding apparatus

1985-02-06

1987-04-07

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358280, 358284, H04N 1415

Patent

active

046565230

ABSTRACT:
A two dimensional coding apparatus in use with a facsimile for two dimensionally coding an image signal, comprises an image memory for storing an image signal and a two dimensional coder for the modified READ coding the image signal in the image memory for each block having a predetermined number of scanning lines. A code signal output from the two dimensional coder is transmitted to a decoder through a transmission line. When a transmission error code is detected by a decoder, the code signal of that block containing the error is retransmitted. A K factor generator selects the block size (K factor) of the two dimensional coder to be optimum according to an error rate, so as to minimize a bit length of the whole transmitted code signals including the retransmitted code signal.

REFERENCES:
patent: 4091424 (1978-05-01), Widergren
patent: 4293920 (1981-10-01), Merola

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