Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1983-02-17
1985-04-30
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358198, H04N 704, H04N 560
Patent
active
045147604
ABSTRACT:
In a television (TV) receiver having digital signal processing in which the video and sound signals are separated in the analog processing circuitry, one analog-to-digital converter (ADC) serves both the video and sound signal paths. The analog video and sound signals are multiplexed into the ADC and are demultiplexed out of the ADC to the digital video processor and to the digital sound processor at predetermined times during each horizontal TV line. In one arrangement, the sound signal conversions are periodically interleaved with the video signal conversions during the horizontal lines. In another arrangement, the sound signal is sampled and stored at normal rate over a horizontal TV line, then converted by the ADC and digitally stored at a higher-than-normal rate during the horizontal blanking interval, and then supplied to the digital sound processor periodically at the normal rate.
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Balaban Alvin R.
Steckler Steven A.
Chin Tommy P.
Herrmann E. P.
Parker Michael D.
Rasmussen P. J.
RCA Corporation
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