Journal Forum

Synchronized Swept-Sine: Theory, Application, and Implementation - October 2015

Effect of Microphone Number and Positioning on the Average of Frequency Responses in Cinema Calibration - October 2015
1 comment

The Measurement and Calibration of Sound Reproducing Systems - July 2015

Access Journal Forum

AES E-Library

A Five-Band Companded Technique for Converting Telephone Quality to Broadcast Quality Using Two Voice-Grade Phone Lines

Document Thumbnail

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.

JAES Volume 34 Issue 10 pp. 804-811; October 1986
Publication Date:

Click to purchase paper 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 $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society