Method and apparatus for subsampling phase spectrum information

Details Method and apparatus for subsampling phase spectrum information Method and apparatus for subsampling phase spectrum information

2006-08-01

2006-08-01

Abebe, Daniel (Department: 2655)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S222000

Reexamination Certificate

active

07085712

ABSTRACT:
Method and apparatus for subsampling phase spectrum information by analyzing and reconstructing a prototype of a frame. The prototype is analyzed by correlating phase parameters generated from the prototype with phase parameters generated from a reference prototype in multiple frequency bands. The prototype is reconstructed using linear phase shift values by producing a set of phase parameters of the reference prototype, generating a set of linear phase shift values associated with the prototype, and composing a phase vector from the set of phase parameters and the set of linear phase shift values across multiple frequency bands. The prototype is reconstructed using circular rotation values by producing a set of circular rotation values associated with the prototype, generating a set of bandpass waveforms associated with the phase parameters of the reference prototype in multiple frequency bands, and modifying the set of bandpass waveforms based upon the circular rotation values.

REFERENCES:
patent: 5701391 (1997-12-01), Pan et al.
patent: 6266644 (2001-07-01), Levine
patent: 6449592 (2002-09-01), Das
patent: 6640209 (2003-10-01), Das

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