AES E-Library

AES E-Library

Properties of Hearing Related to Quadraphony and the Design of a Compatible 4-2-4 Matrix System

Document Thumbnail

For many reasons, the broadcasting of quadraphony is greatly simplified if the information can be compressed into less than four channels, and therefore much attention is being given to channel reduction work. Many ideas have been proposed for reducing the information into two channels for recording or transmission and splitting it on reception to feed four loudspeakers. The majority of these suggestions, some of which are already being promoted as systems for discs, involve the use of phase and amplitude matrices to encode and decode the signals. The two encoded signals therefore, can contain signals of equal, or nearly equal amplitude, and non-equal phase, and this poses questions of compatibility, since the two encoded signals have to provide both acceptable mono and stereo as well as being decodable to give quadraphony.

AES Convention: Paper Number:
Publication Date:

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:

Start a discussion about this paper!

AES - Audio Engineering Society