Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent
1994-08-01
1996-11-26
Kuntz, Curtis
Electrical audio signal processing systems and devices
Binaural and stereophonic
Pseudo stereophonic
381 19, 381 1, H04R 500
Patent
active
055793967
ABSTRACT:
A surround signal processing apparatus, by which an inputted rear surround signal can be reproduced, together with two-channel front stereophonic signals, through a pair of speakers arranged in front of and in substantially right-and-left symmetry about a listener, in such a way that two sound images of the reproduced rear surround signal can be localized at two predetermined positions relative to the listener. The inputted rear surround signal is processed by a filter. The signal processed by the filter is added to one of the stereophonic signals, and then outputted to one of the pair of speakers. Further, an inversion signal of the filter-processed signal is added to the other of the stereophonic signals, and then outputted to the other of the speakers. Here, the transfer characteristics of the filter are determined as follows: (F-K)/(S-A), where S denotes transfer characteristics between one of the speakers and one of the listener's ears positioned on the same side as the speaker, respectively; A denotes transfer characteristics between one of the speakers and one of the listener's ears positioned on an opposite side to the speaker, respectively; F denotes transfer characteristics between one of the two positions at which two sound images are required to be localized and one of the listener's ears positioned on the same side as the image position, respectively; K denotes transfer characteristics between one of the two positions at which the two sound images are required to be localized and one of the listener's ears positioned on an opposite side to the image position; and / denotes a reverse convolution calculation.
REFERENCES:
patent: 3236949 (1966-02-01), Atal et al.
patent: 4159397 (1979-06-01), Iwahara et al.
patent: 4349698 (1982-09-01), Iwahara
patent: 4856064 (1989-08-01), Iwamatsu
patent: 5177798 (1993-01-01), Ohsawa
"Prospects for Transaural Recording", J. Audio Eng. Soc., vol. 37, No. 1/2 1989, Jan./Feb. pp. 3-19.
Iida Toshiyuki
Mouri Tomohiro
Okabe Yasuhisa
Kuntz Curtis
Oh Minsun
Victor Company of Japan Ltd.
LandOfFree
Surround signal processing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surround signal processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surround signal processing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1979608