Line-sequential pyramid processing of a plurality of raster-scanned image variables

摘要

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.