Claims
- 1. A luminance-chrominance signal separation circuit for separating a digitized video signal into a luminance signal and chrominance signal, in which a possible drop-out is detected for every sample of data forming said digitized video signal and a drop-out detection signal is produced for each of said samples for which a drop-out is detected, comprising:
- means for selecting those data samples of said digitized video signal having a phase correlated to the chrominance components of said digitized video signal and for which no drop-outs have been detected; and
- means for linearly combining said selected data samples to produce a luminance signal and a chrominance signal separated from each other, said combining means operating in response to said drop-out detection signals for said data samples;
- wherein said data samples of said digitized video signal are arranged in a two-dimensional matrix;
- wherein said combining means multiplies a plurality of said data samples occurring over two dimensions of said matrix by corresponding coefficients to obtain respective products and adds said products; and
- wherein said selecting means selects values of said coefficients dependent on said drop-out detection signals.
- 2. A luminance-chrominance signal separation circuit for separating a digitized video signal into a luminance signal and chrominance signal, in which a possible drop-out is detected for every sample of data forming said digitized video signal and a drop-out detection signal is produced for each of said samples for which a drop-out is detected, comprising:
- means for selecting those data samples of said digitized video signal having a phase correlated to the chrominance components of said digitized video signal and for which no drop-outs have been detected; and
- means for linearly combining said selected data samples to produce a luminance signal and a chrominance signal separated from each other, said combining means operating in response to said drop-out detection signals for said data samples;
- wherein said combining means comprises a vertical comb line filter receiving said digitized video signal and a horizontal band pass filter receiving an output of said comb line filter; and
- wherein said selecting means controls said comb line filter and said band pass filter.
- 3. A luminance-chrominance signal separation circuit as recited in claim 2, wherein said selecting means changes an internal arrangement of said comb line filter.
- 4. A luminance-chrominance signal separation circuit as recited in claim 2, wherein said selecting means changes a connection between said comb line filter and said band pass filter.
- 5. A method of separating a digitized video signal into a luminance and a chrominance signal comprising the steps of:
- providing a drop-out detection signal for every sample of data of a digitized video signal in which a drop-out is detected;
- selecting those of said data samples having a phase correlated to the chrominance components of said digitized video signal and in which drop-out is not indicated by the respective drop-out detection signal; and
- linearly combining said selected data samples in a manner responsive to the drop-out detection signals of said data samples not so selected so as to produce a luminance signal and a chrominance signal separated from each other;
- wherein said data samples of said digitized video signal are arranged in a two-dimensional matrix;
- wherein said combining step comprises multiplying a plurality of said data samples occurring over two dimensions of said matrix by corresponding coefficients to obtain respective products and adding said products; and
- wherein said selecting step selects values of said coefficients dependent on said drop-out detection signals.
Priority Claims (1)
Number |
Date |
Country |
Kind |
60-284162 |
Dec 1985 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 06/941,869, filed 12/15/85 now abandoned.
US Referenced Citations (9)
Continuations (1)
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Number |
Date |
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Parent |
941869 |
Dec 1986 |
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