SECAM video standard chroma modulation circuit
AssigneeLSI Logic Corporation
InventorPeter W. Runstadler
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Abstract
An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to present a first signal and a second signal in response to (i) a select signal, (ii) a first difference signal and (iii) a second difference signal. The second circuit may be configured to present a modulated output signal in response to the first signal, the second signal and a control signal. The first circuit may alternately operate on one of either (i) the first difference signal or (ii) the second difference signal. In one example, the present invention may be implemented as a SECAM video encoder.
Claims20
An apparatus comprising:
- a first circuit configured to present a first signal and a second signal in response to (i) a select signal, (ii) a center frequency signal and (iii) a difference signal;
- and
- a second circuit configured to present a modulated output signal in response to said first signal, said second signal and a first control signal, wherein said first circuit alternately operates on one of (i) a first component of said difference signal and (ii) a second component of said difference signal.
An apparatus comprising:
- means for generating a first signal and a second signal in response to (i) a select signal, (ii) a center frequency signal and (iii) a difference signal;
- and
- means for generating a modulated output signal in response to said first signal, said second signal and a control signal, wherein said means for generating said first and second signals alternately operates on one of (i) a first component of said difference signal and (ii) a second component of said difference signal.
A method for generating a modulated output signal comprising the steps of:
- (A) generating a first signal in response to (i) a select signal, (ii) a first center frequency signal and (iii) a second center frequency signal;
- and
- (B) generating a second signal by alternately operating on one of (i) a first difference signal and (ii) a second difference signal selected in response to said select signal.
Dependencies are inferred from the claim text.