Signal processing circuit
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorMasahiro Honjo
Life of this patent
Estimating the term…
Abstract
A signal processing circuit for certainly detecting presence or absence of a change in the vertical direction of amplitude and phase of a chrominance signal by once converting the change in the vertical direction of amplitude and phase of the input chrominance signal into a change in the direction of amplitude by a converter, then comparing the converted output with a signal obtained by passing the converted output through one or a plurality of delay circuits by one or a plurality of comparing circuits in amplitude level, and then making an operation with the output of the comparing circuit by an operational circuit.
Claims14
A signal processing circuit comprising:
- a converter for converting a change in the vertical direction of each of amplitude and phase of an input chrominance signal into a change in the direction of amplitude;
- a first delay circuit for delaying the output of said converter by a predetermined time period;
- a second delay circuit for further delaying the output of said first delay circuit by a predetermined time period;
- a first comparing circuit for comparing the amplitude level of the output of said converter with the amplitude level of the output of said first delay circuit;
- a second comparing circuit for comparing the amplitude level of the output of said first delay circuit with the amplitude level of the output of said second delay circuit;
- and
- an operational circuit for making an operation with the output of said first comparing circuit and the output of said second comparing circuit, whereby a vertical correlation of each the amplitude and phase of the chrominance signal is adapted to be detected.
A signal processing circuit comprising:
- a converter for converting a change in the vertical direction of each of amplitude and phase of an input chrominance signal into a change in the direction of amplitude;
- a first delay circuit for delaying the output of said converter by a predetermined time period;
- a comparing circuit for comparing the amplitude level of the output of said converter with the amplitude level of the output of said first delay circuit;
- a second delay circuit for delaying the output of said comparing circuit by the predetermined time period;
- and
- an operational circuit for making an operation with the output of said comparing circuit and the output of said second delay circuit, whereby a vertical correlation of each the amplitude and phase of the chrominance signal is adapted to be detected.
Dependencies are inferred from the claim text.