Journal Forum

Synthetic Reverberator - January 1960

Sound Board: High-Resolution Audio - October 2015

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

Access Journal Forum

AES E-Library

A Unified 4-4-4, 4-3-4, 4-2-4 Sq-Compatible System of Recording and FM Broadcasting (USQ)

Document Thumbnail

The Unified SQ surround-sound recording and broadcasting system (USQ) is a combination of technologies with the objective of spanning the present and the future requirements of the art of surround-sound reproduction. The present-day 4-2-4 SQ matrix system has been found by the FCC Laboratories (Project No. 2710-1) to surpass in quadraphonic listening all other matrix system tested, and to be preferred by the listeners to the four-channel master tape (summed pairwise) and to all other matrix codes for stereophonic and monophonic compatibility. Therefore, if commercial demand were to arise for higher-order surround-sound systems, SQ would be the matrix of choice for the basebands of future 4-2, 5-4, 4-3-4, or 4-4-4 FM broadcast transmitters. Orderly means for assembling this heirarchy are described. Projecting other possibilities, it is shown that 1) a modified-with-logic 4-3-4 system offers potential advantages. 2) A -diamond- 4-3-4 decoding configuration in combination with the square or rectangular loudspeaker arrangement may lead to 4-3-6 or 4-3-8 surround-sound loudspeaker arrays with superior hemispheric perception. 3) SQ quadraphonic synthesis is capable of converting the existing libraries of stereo records to the sourround-sound reproduction mode. 4) Applications of SQ-coded signals to -Kuntzkopfstereophonie--or -dummy head listening- (JAES, 24, 5, 387, June 1976) offers a further intriguing possibility. And, not to slight those who by choice or necessity require the use of spatial (coincident, intensity) microphone systems, it is shown that the SQ GHENT Microphone System (JAES 26, 1/2, 2-11, Jan./Feb. 1978) can be modified by addition of a T-function so as to operate successfully in either the 0-2-4 or the 0-3-4 modes compatibly with all the SQ decoder configurations.

AES Convention: Paper Number:
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