Television – Image signal processing circuitry specific to television – Chrominance signal amplitude control
Patent
1994-06-29
1995-07-11
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Chrominance signal amplitude control
348651, H04N 964
Patent
active
054325641
ABSTRACT:
A reproducing circuit converts a low-band converted chrominance signal into digital signals for reproducing processing and outputs a high-band converted chrominance signal. In this reproducing circuit, the digitalized low-band chrominance signal is separated to phase data and amplitude data. The phase data is decoded, and the frequency and phase fluctuations thereof are corrected. The corrected phase data is encoded to generate a continuous wave. The generated continuous wave is multiplied by the amplitude data to obtain the high-band converted chrominance signal. Similarly, a recording circuit converts a high-band converted chrominance signal into digital signals for recording processing and outputs a low-band converted chrominance signal. In this recording circuit, the digitalized high-band chrominance signal is separated to phase data and amplitude data. The phase data is decoded, and the frequency and phase fluctuations thereof are corrected. The corrected phase data is encoded, and the frequency thereof is controlled to a predetermined frequency to generate a continuous wave. The generated continuous wave is multiplied by the amplitude data to obtain the low-band converted chrominance signal.
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patent: 4695875 (1987-09-01), Kishi
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patent: 5185657 (1993-02-01), Ozaki et al.
IEEE Transaction Consumer Electronics, vol. CE-31, No. 3, pp. 374-377, Aug. 1985, Mehrgardt (ITT).
IEEE Transaction Consumer Electronics, vol. 36, No. 3, pp. 560-566, Aug. 1990, Matsumoto et al, (Matsushita Electronics Co., Ltd.).
Kostak Victor R.
Victor Company of Japan Ltd.
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