Sound Reproduction systems

Details Sound Reproduction systems Sound Reproduction systems

1993-04-27

1998-03-10

Kuntz, Curtis

Electrical audio signal processing systems and devices

Binaural and stereophonic

H04R 500

Patent

active

057270660

ABSTRACT:
A stereophonic sound reproduction system is aimed at synthesizing at a multiplicity of points (L) in the listening space. An auditory effect obtaining at corresponding points (K) in the recording space, to compensate for crosstalk (C.sub.21, C.sub.12) between the loudspeakers, the acoustic response of the listening space, and imperfections in the frequency response of the speaker channels. Each speaker channel incorporates a digital filter (H) with the characteristics of which are adjusted in response to measurements of the reproduced field. The digital filters are provided by an inverse filter matrix (H) of which the matrix elements (H.sub.ij) are determined by a least squares technique, applied so as to minimize the sum of the squared errors resulting from the difference between the actual system impulse response and a desired impulse response. A full bandwidth signal is transmitted by a bypass route for combination with the output signal (9) from the filter, the bypass route including a delay means (F).

REFERENCES:
patent: 4118599 (1978-10-01), Iwahara et al.
patent: 4388494 (1983-06-01), Schone et al.
patent: 4458362 (1984-07-01), Berkovitz et al.
patent: 4628530 (1986-12-01), OpDeBeek et al.
patent: 4661982 (1987-04-01), Kitazato et al.
patent: 4683590 (1987-07-01), Miyoshi et al.
patent: 4751739 (1988-06-01), Serikawa et al.
patent: 4815139 (1989-03-01), Eriksson et al.
patent: 4910779 (1990-03-01), Cooper et al.
patent: 5187692 (1993-02-01), Hangda et al.
Miyoshi and Kaneda, Inverse Filtering of Room Acoustics, Feb. 1988 pp. 145-152.
"Inverse Filtering of Room Acoustics"; Miyashi et al. IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 36, No. 2, Feb. 1988; pp. 145-152.
"Multichannel Spectral Estimation"; S.L. Marple, Jr.; Digital Spectral Analysis with Applications; 1987; pp. 386-431.
"Equalisation of Room Acoustic Responses Over Spatially Distributed Regions"; K.D. Farnsworth et al; Proceedings of the Institute of Acoustics; Autumn Conference; 1985.
"Spectral, Phase, and Transient Equalization for Audio Systems"; P.M. Clarkson et al; J. Audio Eng. Soc., vol. 33, No. 3, 1985 Mar.; pp.127-132.
"Head-Related Two-Channel Stereophony with Loudspeaker Reproduction"; Damaske; J. of the Acoustical Society of America; Nov. 1970; pp. 1109-1115.
"Controlling Sound-Image Localization in Stereophonic Reproduction.sup.* "; Sakamoto et al; J. Audio Eng. Soc., vol. 29, No. 11, Nov. 1981; pp. 794-799.
"Controlling Sound-Image Localization in Stereophonic Reproduction: Part II.sup.* "; Sakamoto et al; J. Audio Eng. Soc., vol. 30, No. 10, Oct. 1982; pp. 719-722.
"Invertibility of a room impulse response"; Neely et al; J. Acoust. Soc. Am. 66(1); Jul. 1979; pp. 165-169.
"Inverse Adaptive Modeling, Equalization, and Deconvolution"; Applications, Part V; pp. 231-269.
"Active Vibration Isolation by Cancelling Bending Waves"; Nelson et al; Proc. I.O.A. vol. 10 Part 2 (1988) pp. 588-605.
"Algorithms for the Active Control of Periodic Sound and Vibrations"; S.J. Elliott et al; ISVR Memorandum No. 679, Dec. 1986; pp. 1-16.

Affiliated with

Also associated with

Rating

Sound Reproduction systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sound Reproduction systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sound Reproduction systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-146597