Television picture zoom system having chroma phase restoration c

Details Television picture zoom system having chroma phase restoration c Television picture zoom system having chroma phase restoration c

1988-01-19

1989-03-21

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 974, H04N 964

Patent

active

048148601

ABSTRACT:
In a TV receiver having a zoom system, the chroma signal is vertically and horizontally expanded by repeating the successive lines and pixels. The polarity of the vertically and horizontally chroma signal is selectively inverted in a manner restoring the phase coherence in the output signal.

REFERENCES:
patent: 4134128 (1979-01-01), Hurst
patent: 4204227 (1980-05-01), Gurley
patent: 4220965 (1980-09-01), Heitmann et al.
patent: 4689660 (1987-08-01), Kashigi
patent: 4712130 (1987-12-01), Casey
patent: 4727411 (1988-02-01), Yamaguchi et al.

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