A technique has been developed whereby two voice-grade telephone lines can be used to send and receive broadcast-quality audio. The technique involves five-band compression, shifting the frequency bands of the program during transmission to occupy two 3-kHz-bandwidth phone lines, then "unshifting" the received phone-line signals, and finally dynamic range expansion to exactly mirror the compression used during transmission. The resulting product has been successfully employed receivly by several networks and broadcasters. The development of the technique and its application are described.

Authors: Talbot, Daniel B.; Cheney, John F.
Affiliation: Comrex Corp., Acton, MA
JAES Volume 34 Issue 10 pp. 804-811; October 1986
Publication Date: October 1, 1986 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=5241

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes4)   /jrnl7888/1986/8135.pdf

Start a discussion about this paper!