Surround-sound system with motion picture soundtrack timbre corr

Details Surround-sound system with motion picture soundtrack timbre corr Surround-sound system with motion picture soundtrack timbre corr

1991-05-28

1993-06-22

Young, W. R.

Dynamic information storage or retrieval

Storage or retrieval of spatially related acoustic signals

Quadraphonic

381 20, G11B 2002

Patent

active

052220591

ABSTRACT:
Spectral imbalance (alteration in timbre) when playing home video versions of motion pictures having soundtrack equalized for playback in a room whose room-loudspeaker system is aligned to the standard motion picture theater X-curve is overcome by timbre correction which compensates for the X-curve equalization. Surround-sound home playback of motion pictures is enhanced by employing main channel loudspeakers that produce generally direct sound fields and surround channel loudspeakers that produce generally diffuse sound fields. In addition, the reproduced surround-sound channel is further enhanced by decreasing the interaural cross-correlation of the surround-sound channel sound field and by reducing comb filtering effects in the surround-sound channel at listening positions within the room, preferably by introducing slight pitch shifting in the signals applied to multiple surround loudspeakers. Preferably, further equalization is applied to the reproduced surround channel to compensate for the differences in listener perceived timbre between the surround-sound channel and the main channels.

REFERENCES:
patent: 4204091 (1980-05-01), Ishigaki et al.
patent: 4251685 (1981-02-01), Fellgett
patent: 4332986 (1982-06-01), Butler
patent: 4410063 (1983-10-01), Yasue et al.
patent: 4574391 (1986-03-01), Morishima
patent: 4577305 (1986-03-01), Allen et al.
patent: 4589129 (1986-05-01), Blackmer et al.
patent: 4612665 (1986-09-01), Inami et al.
patent: 4661982 (1987-04-01), Kitazato et al.
patent: 4696036 (1987-09-01), Julstrom
patent: 4736426 (1988-04-01), Kinoshita et al.
patent: 4739513 (1988-04-01), Kunugi et al.
patent: 4807217 (1989-02-01), Ide
patent: 4823391 (1989-04-01), Schwartz
"The Influence of Room Boundaries on Loudspeaker Power Output" by Roy F. Allison J. Audio Eng. Soc., vol. 22, No. 5, Jun. 1974, pp. 314-320.
"Transformation of Sound Pressure Level from the Free Field to the Eardrum in the Horizontal Plane," E. A. G. Shaw, J.Acoust.Soc.Am., Dec. 1974, pp. 1848-1861.
"From Instrument to Ear in a Room: Direct or via Recording" by A. H. Benade, J.AudioEng.Soc., vol. 33, No. 4, Apr. 1985, pp. 218-233.
"Listening to Sound in Rooms" by W. M. Hartmann (abstract), J.Acoust.Soc.Am. Suppl. 1, vol. 83, Spring 1988, p. S74.
"Temporal Window Shape as a Function of Frequency and Level" by Christopher J. J. Plack et al, J. Acoust. Soc. Am., May 1990, pp. 2178-2187.
"New Factors in Sound for Cinema and Television" by Tomlinson Holman, J. Audio Eng. Soc., vol. 39, No. 7/8, Jul./Aug. 1991, pp. 529-539.

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