Television – Image signal processing circuitry specific to television – Special effects
Patent
1998-03-11
2000-05-09
Harvey, David E.
Television
Image signal processing circuitry specific to television
Special effects
348568, 348566, H04N 974
Patent
active
060610980
ABSTRACT:
The circuit simultaneously filters and decimates a video signal formed with samples for luminance and chrominance. A subcircuit provides the samples in distinct sequences with alternate luminance and chrominance values. A filter stage is provided which contains a first adder which is supplied with one of the sequences via a first register. The other terminal of the adder is supplied with the other sequence. A second register can be directly connected to the adder if luminance samples are processed, and via a third register if chrominance samples are processed. The output signal of the second register is combined with the samples of one of the sequences by means of an adder at the output end. In the case of a higher degree of the filter, a number of filter stages are cascaded (connected in series). Where a higher degree of decimation is required, feedback is provided in each filter stage.
REFERENCES:
patent: 4821086 (1989-04-01), McNeely et al.
"IC Set for a picture-in-picture system with on-chip memory" (Burkert et al.), IEEE Transactions on Consumer Electronics. vol. 36, No. 1, Feb. 1990, pp. 23-31.
"New picture-in-picture LSI enhanced functionality for high picture quality" (Honzawa et al.), IEEE Transactions on Consumer Electronics, vol. 36, No. 3, Aug. 1990, pp. 387-394.
Mehrgardt Soenke
Nie Xiaoning
Greenberg Laurence A.
Harvey David E.
Lerner Herbert L.
Siemens Aktiengesellschaft
Stemer Werner H.
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