Pitch control apparatus for setting coefficients for cross-fadin

Details Pitch control apparatus for setting coefficients for cross-fadin Pitch control apparatus for setting coefficients for cross-fadin

1995-04-18

1996-05-28

Lall, Parshotam S.

395 274, 395800, 395 216, 84604, G10L 302

Patent

active

055220100

ABSTRACT:
A pitch control apparatus which suppresses the occurrence of a tremolo tone which the interval control is performed. Input audio signal data is written at a memory position at a designated writing address in a memory in a predetermined order for every sampling cycle, a plurality of reading addresses of the memory are designated for every sampling cycle, and are set in a different order from the predetermined order for each cycle which is a multiple of the sampling cycle by a predetermined multiplier, data is read from memory positions of designated plurality of reading addresses in the memory, a coefficient is set in accordance with an address interval between the writing address and each of the designated plurality of reading addresses in the memory, the data read out at the plurality of reading addresses are multiplied by the associated coefficients, and the results are added together as output data. The maximum value of interval between each of the plurality of reading addresses, Dmax, is set as

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