Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1994-11-30
1997-01-21
Tran, Thai G.
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
348630, 386 1, H04N 979, H04N 521
Patent
active
055964176
ABSTRACT:
A color signal processor in which a color subcarrier is multiplied with either a signal harmonic or a phase shifted harmonic of a low frequency chrominance signal, depending on whether the R-Y axis of the chrominance signal is inverted. Band pass filtering extracts an arithmetic carrier signal resulting from the multiplication. The low frequency chrominance signal is multiplied by the extracted arithmetic carrier, and band pass filtering removes both upper and lower side band components generated in accordance with the low frequency chrominance signal multiplication. Various configurations of the above invention eliminate the need for a circuit inverting the R-Y axis, simplifying the structure of color signal processors and related devices. In addition, since no resonating circuit is used, the invention can be effectively implemented in an integrated circuit.
REFERENCES:
patent: 4605951 (1986-08-01), Kuribayashi
patent: 4933748 (1990-06-01), Katsuki et al.
patent: 5153741 (1992-10-01), Matsuo et al.
"Hitachi Hyoron" vol. 74, No. 3 (1992-3) p. 277.
Chevalier Robert
Kabushiki Kaisha Toshiba
Tran Thai G.
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