Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1982-02-22
1985-02-26
Murray, Richard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
H04N 544
Patent
active
045020787
ABSTRACT:
An analog carrier signal and its sidebands contain modulated information which is to be digitally encoded and processed. Demodulation and digital encoding is accomplished in a single process by an analog-to-digital converter, which samples the analog signals in response to a sampling signal of a frequency which is at least twice the bandwidth of the band of frequencies containing the carrier signal and its information-bearing sidebands. The analog signal samples are digitally encoded, producing a band of digital information signals corresponding to baseband signal components. When used in a television receiver to produce digital signal samples, the band of analog signals may include both sound and picture carriers and their audio and video information. By controlling the phase and frequency of the analog carrier signal in relation to the color subcarrier signal, and deriving the sampling signal from the analog carrier, an ease in video signal demodulation is provided.
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Booklet "A New Dimension-VLSI Digital TV System" by Intermetall Semiconductors, Sep. 1981.
Balaban Alvin R.
Steckler Steven A.
Herrmann E. P.
Murray Richard
Rasmussen P. J.
RCA Corporation
Whitacre E. M.
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