Pre-emphasis and de-emphasis filters for a composite NTSC format

Details Pre-emphasis and de-emphasis filters for a composite NTSC format Pre-emphasis and de-emphasis filters for a composite NTSC format

1983-12-27

1985-12-24

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, 358 13, 358 31, H04N 942, H04N 932, H04N 9535, H04N 521

Patent

active

045610126

ABSTRACT:
Phase reversal of solely the chrominance component of only alternate frames of an NTSC format signal prior to pre-emphasis and again subsequent to de-emphasis permits simpler and less costly filter structure to be employed without any loss of filtering capability.

REFERENCES:
patent: 3305627 (1967-02-01), Krause
patent: 3843940 (1974-10-01), Ishiguro et al.
patent: 4064530 (1977-12-01), Kaiser et al.
patent: 4107736 (1978-08-01), Lowry et al.
patent: 4142205 (1979-02-01), Iinuma
patent: 4200889 (1980-04-01), Strobele
patent: 4242704 (1980-12-01), Ito et al.
patent: 4268855 (1981-05-01), Takahashi
patent: 4291333 (1981-09-01), Warnock et al.
patent: 4400718 (1983-08-01), Lee
"Video-Signal Improvement Using Comb Filtering Techniques", G. D. Arndt, et al., IEEE Transactions on Communication, Apr., 1973, pp. 330-336.

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