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Psychoacoustic studies undertaken by the authors indicate that there exists in a full 360° sound field the redundancy of directional information which is not detected by the human ear. Through the transmission and reproduction of the 360° sound field information, two-channel stereo transmission media provide a sound field that sufficiently approximates the original. This paper describes the process, utilizing the -QS Vario-Matrix- as an example of matrix systems to achieve such reproduction.

Authors: Takahashi, Susumu; Hirano, Kouichi
Affiliation: Sansui Electric Company Limited, Tokyo, Japan
AES Convention: 44 (March 1973) Paper Number: G-6
Publication Date: March 1, 1973

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Scott Dorsey

Comment posted January 8, 2021 @ 16:45:32 UTC (Comment permalink) This paper is interesting because it's one of the earlier discussions of a matrix surround system.  In practice front/back separation of these systems is rather poor for sounds that are off the center of the sound field, but they were an advance because they allowed existing two-channel recording and reproduction paths to be used for limited surround audio.  Compare this paper with one of the early Dolby Surround papers and you'll see there is really very little difference between this encoding and the one that Dolby promoted five years later. (Respond to this comment)

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