Dismiss
The InnovationQ application will be updated on Sunday, May 31st from 10am-noon ET. You may experience brief service interruptions during that time.
Browse Prior Art Database

Transmission of Compressed Analog Samples

IP.com Disclosure Number: IPCOM000046856D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Zuercher, M [+details]

Abstract

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.