Transmission of Compressed Analog Samples
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Signals from a number of low-frequency signal sources SS1 to SSn are sampled by pulses SP having a frequency of, for example, 8 kHz. The analog samples are shifted into a number of analog shift registers ASR1 to ASRn. When a shift register is full, its contents are shifted out between two consecutive sampling pulses. The outputs of all shift registers are connected to a time multiplex bus from where the analog samples reach a transmission path TP through a low-pass filter LPF. Before transmission, the compression frequency n x 8 kHz has to be suppressed by suitable filters. At the receiver end, a similar arrangement with the same number of shift registers is used to expand and demultiplex analog samples.