HDTV transmission system with reduced susceptibility to NTSC coc

Details HDTV transmission system with reduced susceptibility to NTSC coc HDTV transmission system with reduced susceptibility to NTSC coc

1991-06-04

1992-09-29

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358186, H04N 704

Patent

active

051517850

ABSTRACT:
A digital HDTV video data signal having a substantially flat spectrum is modified by a prefiltering operation to impose a spectral periodicity on the transmitted signal corresponding to the spectral periodicity of an NTSC television signal. The received signal is processed by a post filter having a frequency response comprising the inverse of the prefilter, whereby the received digital video data signal is substantially restored while any received NTSC cochannel interference is substantially attenuated.

REFERENCES:
patent: 4216496 (1980-08-01), Lothian et al.
patent: 4802000 (1989-01-01), Willis
patent: 4958230 (1990-09-01), Jonnalagadda et al.
patent: 5003389 (1991-03-01), Isobe et al.

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