Time compression/expansion with synchronized individual pitch co

Details Time compression/expansion with synchronized individual pitch co Time compression/expansion with synchronized individual pitch co

1980-08-18

1983-09-20

Cardillo, Jr., Raymond F.

Dynamic information storage or retrieval

Storage or retrieval of spatially related acoustic signals

With transformation or intentional distortion of information...

360 8, 369175, 179 1555T, H04B 166, G11B 3100

Patent

active

044060017

ABSTRACT:
A time compression/expansion audio reproduction system of the type that provides pitch correction by repetitive variable time delay achieves improved performance by separating the reproduced signal from a recording into components which are separately delayed. For studio quality reproduction the signal is separated into contiguous frequency bands which are each delayed synchronously and the processing noise in each band is eliminated by filtering each band signal after delay to eliminate high frequency components. Bandpass filtering prior to recombination as well as blanking and amplitude compression and expansion are also disclosed.

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patent: 3975763 (1976-08-01), Kitamura
patent: 4241235 (1980-12-01), McCanney

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