| US 7,514,620 B2 | ||
| Method for shifting pitches of audio signals to a desired pitch relationship | ||
| Sol Friedman, Beverly Hills, Calif. (US); Josephine Friedman, legal representative; Hanns-Christof Adam, Norderstedt (Germany); and Steffan Diedrichsen, Schleswig-Holstein (Germany) | ||
| Assigned to Apple Inc., Cupertino, Calif. (US) | ||
| Filed on Aug. 25, 2006, as Appl. No. 11/510,031. | ||
| Prior Publication US 2008/0047414 A1, Feb. 28, 2008 | ||
| Int. Cl. G10H 1/44 (2006.01) | ||
| U.S. Cl. 84—454 [84/600] | 27 Claims |
| 1. A method for achieving a desired relationship between pitches of audio signals, said method comprising:
receiving two or more audio signals each having a pitch;
determining a reference signal of the two or more audio signals;
for each audio signal other than the reference signal:
determining a relationship between the pitch of the reference signal and the pitch of the audio signal other than the reference
signal;
determining an adjustment to bring the relationship to a desired pitch relationship; and
applying a value representing the adjustment to a set of adjustments; and shifting the pitch of at least one of the two or
more audio signals, based on the set of adjustments;
wherein the two or more audio signals are derived from a corresponding two or more channels and the reference signal is always
taken from the same channel.
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