Low-band conversion chrominance signal processing apparatus and

Details Low-band conversion chrominance signal processing apparatus and Low-band conversion chrominance signal processing apparatus and

1993-11-29

1995-02-28

Groody, James J.

Television

Image signal processing circuitry specific to television

Color television signal processing

348539, 348713, H04N 964

Patent

active

053941977

ABSTRACT:
A chrominance signal processing apparatus, where a chrominance subcarrier and a low-band converting chrominance subcarder are formed, uses a common oscillating signal to form the low-band converting chrominance subcarrier. The low-band converting chrominance signal processing apparatus includes an oscillator for producing an oscillating signal having a predetermined frequency, a chrominance subcarder generator receiving the oscillating signal to produce a chrominance subcarrier, a chrominance demodulator demodulating the chrominance signal incorporated in a composite video signal, a chrominance subcarrier generator receiving the oscillating signal to produce the low-band converting chrominance subcarrier, and a chrominance modulator receiving the chrominance signal demodulated in the chrominance demodulator and the low-band converting chrominance subcarrier to produce the low-band converting chrominance signal. When the signal is processed in the NTSC system or the PAL system, the chrominance signal processing apparatus performs the chrominance signal process, using the oscillating signal. A method for chrominance signal processing is also described.

REFERENCES:
patent: 4811085 (1989-03-01), Idei

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