Vir-signal processing circuitry for video tape recorder

H - Electricity – 04 – N

Patent

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Details

CPC

352/18, 350/38,

IPC codes

H04N 5/92 (2006.01) H04N 9/82 (2006.01) H04N 9/87 (2006.01)

Type

Patent

Patent number

CA 1125908

Description

ABSTRACT OF THE DISCLOSURE A VIR-signal processing circuitry for a VTR (video tape recorder) having a comb filter for obtaining a correct operation of the VIR circuit incorporated in a television receivers, comprises a comb filter stopping means for prevent- ing the VITS (vertical interval test signal) on the 18th line from polluting the VIRS (vertical interval reference signal), a phase transfer means for transferring the phase information of the transmitted VIRS to the reference subcarrier after elimination of the crosstalks by integrating the VIRS, an am- plitude transfer means for transferring the amplitude informa- tion of the transmitted VIRS to the output signal of said phase transfer means after elimination of the crosstalks by integrat- ing the VIRS, and a VIRS replacing means for replacing the transmitted VIRS by the newly developed chrominance reference using the output signal of said amplitude transfer means.

Application Number

313061

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