Pitch shift apparatus and method

Details Pitch shift apparatus and method Pitch shift apparatus and method

1997-11-18

2000-12-19

Harvey, Minsun Oh

Electrical audio signal processing systems and devices

Including frequency control

Automatic tone control

381 98, H03G 500

Patent

active

061636142

ABSTRACT:
A pitch shift apparatus is provided to pitch shift a digital audio signal into a pitch-shifted signal. The apparatus comprises a receiving means, a pitch shifting means and a connecting means, wherein the connecting means comprises: a search region comparator for comparing each sample in the search region with a reference level to obtain a search region bit sequence representing the amplitude of each sample in the search region; a cross region comparator for comparing each sample in the cross region with the reference level to obtain a cross region bit sequence representing the amplitude of each sample in the cross region; a bit processor for bit comparing the cross region bit sequence and any sub-search region bit sequence of M samples in the search region to obtain a corresponding non-similarity; and a connecting device connecting the cross region and a sub-search region corresponding to the minimum non-similarity to renew the pitch-shifted signal.

REFERENCES:
"On Audio Processing for MPEG Decoding, Pitch-shifting and Subband Coding". A thesis submitted to Institute of Electronics College of Engineering and Computer Science National Chiao Tung University in Partial Fulfillment of Requirements for the Degree of Master of Science in Electronics Engineering--Jun. 1996.

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