Accession Number : AD0753166

Title :   Optimal Digital Voice Transmission.

Descriptive Note : Final rept. Mar 71-Jun 72,

Corporate Author : ITT DEFENSE COMMUNICATIONS DIV NUTLEY N J

Personal Author(s) : Presto,Anthony F.

Report Date : NOV 1972

Pagination or Media Count : 129

Abstract : REPORT DESCRIBES A DIGITAL DATA RATE REDUCTION TECHNIQUE DESIGNATED AS Time Assignment Speech Interpolation (TASI) and the corresponding development of an experimental digital TASI equipment. The Digital TASI technique was used to demonstrate a reduction in the transmission rate for a digital multi-channel communications system. The TASI system takes advantage of the idle or silent periods on each one-way channel to interpolate additional conversations. Thus, many incoming channels can be connected into one outgoing channel in a time division manner. The input signal for the experimental TASI equipment is a 48 voice channel PCM/TDM signal using standard 6 bit per sample PCM. The output is 19 channels of 6 bit PCM plus 1 1/3 channels for overhead information. (Author)

Descriptors :   (*DATA TRANSMISSION SYSTEMS, DIGITAL SYSTEMS), VOICE COMMUNICATIONS, PULSE CODE MODULATION, MULTIPLE OPERATION, DATA PROCESSING, OPTIMIZATION, COMMUNICATION EQUIPMENT

Subject Categories : Cybernetics
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE