Decoding composite pal television signals

Details Decoding composite pal television signals Decoding composite pal television signals

H - Electricity

04

N

350/72

H04N 9/12 (2006.01) H04N 11/16 (2006.01)

Patent

CA 1152633

ABSTRACT OF THE DISCLOSURE A composite PAL television signal decoder comprises a first delay device for delaying an input PAL television signal A by one horizontal line scan period minus one quarter of a period of the color sub-carrier signal to produce a first delayed signal B, a second delay device for delaying the signal A by one half of a period of the color sub-carrier signal to produce a second delayed signal C, a third delay device for delaying the signal C by one horizontal line scan period minus one quarter of a period of the color sub-carrier signal to produce a third delayed signal D, means to derive a luminance component Y as one half (A+D), means to derive a chrominance component U as one quarter (B+D) minus one quarter (A+C), and means to derive a chrominance component V as one quarter (C+D) minus one quarter (A+B).

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