Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
March 11, 2014
Patent Application Number
12455752
Date Filed
June 5, 2009
Patent Citations Received
Patent Primary Examiner
Patent abstract
A method, system and program for encoding and decoding speech according to a source-filter model whereby speech is modelled to comprise a source signal filtered by a time-varying filter. The method comprises: receiving a speech signal comprising successive frames, for each of a plurality of frames of the speech signal, deriving a first line spectral frequency vector for a first portion of the frame, and a second line spectral frequency vector for a second portion of the frame, and determining a transmit line spectral frequency vector and an interpolation factor based on the first and second line spectral frequency vectors, and on the transmit line spectral frequency vector for a preceding one of the frames.
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