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:

1972-11-01

Pagination or Media Count:

129.0

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 PCMTDM signal using standard 6 bit per sample PCM. The output is 19 channels of 6 bit PCM plus 1 13 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