Apparatus for demodulating sampled data chroma signals

Details Apparatus for demodulating sampled data chroma signals Apparatus for demodulating sampled data chroma signals

H - Electricity

04

N

350/72

H04N 9/12 (2006.01) H04N 11/14 (2006.01)

Patent

CA 1213363

-19- Abstract of the Disclosure Apparatus is provided for demodulating sampled data chrominance signals. The chrominance samples occur in sequences of interleaved first and second color mixture signals of the form +A, +B, -A, -B. The + and - signs associated with like letters indicate a difference in sampling phase of 180 degrees relative to the color burst reference. Samples separated by exactly one horizontal line are sampled on opposite phases. Means are provided for selectively demultiplexing samples of a first color mixture signal component sampled at a prescribed sampling phase from every other horizontal line of the chrominance signal, and demultiplexing and inverting the polarity of samples of said color mixture signal component sampled at 180 degrees phase differences relative to the prescribed sampling phase on the intervening lines of chrominance signal.

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