Television – Basic receiver with additional function – For display of additional information
Patent
1997-04-23
2000-12-26
Kostak, Victor R.
Television
Basic receiver with additional function
For display of additional information
348558, H04N 545
Patent
active
061667773
ABSTRACT:
The PIP type video signal processing circuit for a multi-picture display circuit in which a sub-channel video signal is compressed in accordance with a discriminated mode and a reading period is synchronized with a period of the video signal of a main-picture region when the sub-picture video signal is selectively selected of the TV video signal provided from the TV and the PC video signal provided from the PC. The present invention comprises a mode discriminator/timing generator for discriminating a mode in accordance with a synchronizing signal of a sub-picture video signal, producing a control signal for synchronizing horizontal and vertical frequencies of sub-picture video signal with a main-picture video signal, and separating synchronizing signals from the synchronizing signal of the sub-picture video signal, a video compressor for compressing the input TV video signal or input PC video signal with a predetermined pattern, a dual-port memory for storing the sub-picture video signal provided from the video compressor and outputting the sub-picture video signal by the synchronizing control signal.
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Kostak Victor R.
LG Electronics Inc.
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