Audio signal translation with no delay elements

Details Audio signal translation with no delay elements Audio signal translation with no delay elements

1980-06-18

1982-09-14

Olms, Douglas W.

179 1GP, H04S 100, H04S 500

Patent

active

043496989

ABSTRACT:
Spatially correlated input audio signals are combined in a first combination of adder and subtracter to produce an input summation signal and an input difference signal, which are respectively translated by first and second filter circuits. The transfer function of the first filter circuit describes the relationship between the input summation signal and a summation of output audio signals and the transfer function of the second filter circuit describes the relationship between the input difference signal and a difference between the output audio signals. The translated signals are combined in a second combination of adder and subtracter to produce the output audio signals. Each of the filter circuits is designed with a minimum amount of phase shift which allows elimination of delay elements.

REFERENCES:
patent: 4118599 (1978-10-01), Iwahara et al.
patent: 4192969 (1980-03-01), Iwahara et al.
patent: 4209665 (1980-06-01), Iwahara
patent: 4218585 (1980-08-01), Carver

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