Method and apparatus for multichannel sound reproduction

Details Method and apparatus for multichannel sound reproduction Method and apparatus for multichannel sound reproduction

1995-06-07

1997-12-30

Oh, Minsun

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

381 19, 381 1, H04R 500

Patent

active

057039550

ABSTRACT:
A multichannel sound reproduction method and apparatus are described for achieving a higher proportion in the overall room size for acoustic/visual use, which can be used for the listening-position-independent reproduction of spatial information in maintaining the given directional information of the individual sound signal sources. In the described method, each signal is split up and, after a summation, part of it with an increased delay, a modified level and a changed phase position is supplied to one of the unchanged signal portions, with the aggregate signals being distributed and supplied to the two surround reproduction channels and to other reproduction loudspeakers distributedly located in the room in conformity with directional allocation and in accordance with the relevant unchanged signal portions. To this end, an apparatus consisting of matrix and processing modules for electroacoustic adaptation and optimization of given listening zones is described, which checks the parameters of the reproduction arrangement and corrects them in the existing reproduction channels using controllable matrixing and processing modules. The described method and apparatus are suited for the reproduction of direction-oriented sound signals that are transmitted or stored.

REFERENCES:
patent: 5199075 (1993-03-01), Fosgate
Proposed SMPTE Recommended Practice--Loudspeaker Placements For Audio Monitoring In High-Definition Electronic Production, RP 173, pp. 1-3.
Lauridsen, H. et al. "MIS-Loudspeaker" Gravesamel Blatter, Switzerland 1956 Aug. No. V pp. 28-50.

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