Television – Format conversion – Conversion between standards with different aspect ratios
Patent
1994-09-08
1996-06-18
Kostak, Victor R.
Television
Format conversion
Conversion between standards with different aspect ratios
348556, H04N 701, H04N 546
Patent
active
055283055
ABSTRACT:
An apparatus for reducing empty sides of a wide screen decreases no-signal area on the left and right sides of the wide screen by differing time compression ratio of a video signal when an NTSC video signal having an aspect ratio of 4:3 is displayed on the wide screen having an aspect ratio of 16:9. A controller sets the frequency of read clock signals supplied to a line memory which are varied with respect to each sub-section within an effective horizontal scanning section to compress the NTSC video signal in the central sub-section of the effective horizontal scanning section. By compressing the video signal, the central portion of the wide screen displays the time-compressed picture while the left and right portions displays a broader picture which is not subjected to the time compression.
REFERENCES:
patent: 4730215 (1988-03-01), Jose et al.
patent: 5170256 (1992-12-01), Tabata
patent: 5243421 (1993-09-01), Nagata et al.
patent: 5323235 (1994-06-01), Jonomura et al.
patent: 5353065 (1994-10-01), Katsumata
patent: 5386236 (1995-01-01), Hong
patent: 5428454 (1995-06-01), Kimura et al.
Kostak Victor R.
Samsung Electronics Co,. Ltd.
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