Line-sequential pyramid processing of a plurality of raster-scanned image variables
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United States of America Patent
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Jan 1, 1991
Grant Date -
N/A
app pub date -
May 6, 1988
filing date -
May 6, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A plurality of raster-scanned image variables are time-compressed and time-division multiplexed on a line-sequential basis for pyramid analysis. The resulting differential pulse code modulation is statistically encoded and assembled together with digital audio code and synchronizing code. The assembler supplies a serial stream of bits to a transmitter. Receiving apparatus for a video teleconferencing station includes a receiver complementary to the transmitter and a parser for separating digital codewords. Those codewords that are statistical codes descriptive of differential pulse code modulation of video are demodulated. The demodulation results are formatted for a pyramid synthesizer. The stream of samples provided as output signal from the pyramid synthesizer is time-division demultiplexed and time expanded to recover the plurality of raster-scanned image variables.
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