Symbol code generation processing from interframe DPCM of TDM'd

Details Symbol code generation processing from interframe DPCM of TDM'd Symbol code generation processing from interframe DPCM of TDM'd

1987-12-18

1989-05-02

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, 358 13, H04N 712, H04N 1104

Patent

active

048273368

ABSTRACT:
At a sending station in a digital television transmission system embodying the invention, time-division multiplexing either of the spatial-frequency analyses of the video signals from a television camera or of their interframe DPCM responses, both of which have uniform coding rates, is completed prior to symbol coding of interframe DPCM samples. This obviates the problems of time-division multiplexing symbol codes of variable length and of irregular coding rate. Time-division multiplexing is done so as to facilitate symbol coding protocols which include run-length encoding of DPCM samples. At a receiving station in the digital television transmission system time-division demultiplexing takes place after symbol decoding, being done on a per scan line basis.

REFERENCES:
patent: 4663660 (1987-05-01), Fidele et al.
patent: 4674125 (1987-06-01), Carlson et al.
patent: 4691233 (1987-09-01), Acampora
"Subband Coding of Images", J. W. Woods et al., IEEE Transactions on Acoustics, Speech, & Signal Processing, vol. ASSP-34, pp. 1278-2388.
"An Efficient Image Representation for Multiscale Analysis", Stephane Mallet, Topical Meeting on Machine Vision, Technical Digest Series 1987, vol. 12 (Optical Society of America) pp. 172-175.

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