JAMES R HOWARTH
Broker in Nantucket, MA
License number
Massachusetts 9050654
Issued Date
Nov 19, 2002
Expiration Date
Jun 30, 2017
Type
Salesperson
Address
Address
Nantucket, MA 02554
Professional information
Corrective Adjustment Of Recording Characteristics In Digital Renditions Of Analog Recordings
US Patent:
7933084, Apr 26, 2011
Filed:
Oct 6, 2003
Appl. No.:
10/530511
Inventors:
James R. Howarth - Nantucket MA, US
Patrick J. Wolfe - Cambridge, GB
Darryl Curley - Oromondo, CA
Timothy Rector - Frederickton, CA
Patrick J. Wolfe - Cambridge, GB
Darryl Curley - Oromondo, CA
Timothy Rector - Frederickton, CA
International Classification:
G11B 5/02
US Classification:
360 25, 360 1, 360 8, 360 27, 360 29, 360 32
Abstract:
A signal reconstruction technique is used to correct for wow and flutter in analog audio recordings. Elements of the recording are used to generate a signal for correcting the output. Involves locating modulated entities such as bias signal (e. g. frequency-modulated, amplitude-modulated, or phase-modulated entities) in the recording, extracting them, and utilizing them as a carrier to synchronize to a master clock, using the irregularity of the anomaly to indicate the speed and pitch information to be corrected. A carrier frequency is determined and applied to a digitized form of the recording. This may be performed even in the absence of a prescribed reference code or tone, such as a pilot tone laid down purposefully at the moment of recording. In the case of signals presumed to have an error in the carrier, a corresponding signal is buffered, and in the case of a presumed error, a last known signal is used for the duration of the error.