Method and apparatus for testing video

Details Method and apparatus for testing video Method and apparatus for testing video

1992-01-09

1993-09-21

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358139, 358324, 358327, H04N 1702, H04N 1704

Patent

active

052473503

ABSTRACT:
The chroma circuits of a VCR are tested by replacing the video signal from the video heads of the VCR with a composite signal from a test pattern signal developed by a test instrument, which composite signal includes a chroma signal which is phase rotated in response to a chroma reference signal from the VCR. The chroma reference signal from the VCR is used to control the chroma signal in the composite test pattern signal.

REFERENCES:
patent: 4554663 (1985-11-01), Pham van Cang
patent: 4907181 (1990-03-01), Hedtke et al.
patent: 4931877 (1990-06-01), Gebhardt et al.

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