Television – Format conversion – Line doublers type
Reexamination Certificate
2005-08-09
2005-08-09
Kostak, Victor R. (Department: 2614)
Television
Format conversion
Line doublers type
Reexamination Certificate
active
06927800
ABSTRACT:
A double-rate signal achieved by subjecting a video signal to double-rate conversion is supplied to a scan line number converter, wherein the portion of the effective scan lines of the double-rate signal is written into a frame memory based on a signal achieved by multiplying horizontal and vertical synchronous signals of the double-rate signal. In the effective scan line section of an HDTV signal, the video signal written in the frame memory is read out based on horizontal and vertical reference signals of the HDTV signal. Out of the effective scan line section of the HDTV signal, a pedestal level signal written in a memory is read out based on the horizontal and vertical reference signals of the HDTV signal, thereby achieving an HDTV signal whose vertical scan line number is equal to 1125 lines. Accordingly, the HDTV signal suffers no degradation because the video signal in the section of 960 effective scan lines of the double-rate signal is not interpolated
REFERENCES:
patent: 5168362 (1992-12-01), Yoshida
patent: 5452093 (1995-09-01), Kwak
Kostak Victor R.
Maioli Jay H.
Sony Corporation
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