Audio signal processing arrangement for deriving a centre channe

Details Audio signal processing arrangement for deriving a centre channe Audio signal processing arrangement for deriving a centre channe

1994-01-25

1996-06-18

Brinich, Stephen

Electrical audio signal processing systems and devices

Binaural and stereophonic

Center channel

381 22, H03G 300

Patent

active

055286941

ABSTRACT:
An audio signal processing arrangement includes a first filter (20) for splitting off signal components from the left channel signal (L) at least within one frequency band. Signal components are split off from the right channel signal (R) by a second filter (23). The output signals of the filters (20 and 23) are compared with the right channel signal (R) and the left channel signal (L), respectively. The filter parameters of the filters (20 and 23) are adjusted to values at which there is maximum correlation between the compared signals according to a given criterion. The center channel signal is derived in dependence on the filter adjustment. This can be effected by combining the output signals of the filters (20 and 23). In this manner, a center channel signal is obtained formed by the correlating left and right channel signal components, so that the stereo image is hardly disturbed by the addition of the center channel signal, whereas the perceived position of the virtual sources in the stereo image becomes less dependent on the listener's position with respect to the left and right loudspeakers.

REFERENCES:
patent: 4024344 (1977-05-01), Dolby et al.
patent: 4685136 (1987-08-01), Latshaw
patent: 4747142 (1988-05-01), Tofte

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