Patent ID: 7933084
Filing Date: 2011-04-26
Classification: G11B

Abstract:
1. A method of providing an improved audio reproduction derived from an analog recording, the method comprising: digitizing a wideband playback signal from an analog recording containing wow/flutter; deriving, without use of a prescribed tone or time-code previously applied and intended to be indicative of timing, a reference signal from within the digitized wideband playback signal, the reference signal being an extraneous artifact within the recording; generating a modulated carrier by at least one of stabilizing, idealizing, and demodulating the reference signal; deducing deviations between the modulated carrier and a high-precision clock signal or sampling rate adjusting timing and pitch in the digitized wideband playback signal in response to the deduced deviations, wherein such adjusting comprises establishing a change in a period of the reference signal, then conforming the timing and pitch of the digitized wideband playback signal to the modulated carrier thereby producing a wideband playback signal substantially corrected for distortion corresponding to said wow/flutter.