Multi-pass echo residue detection with speech application...

Details Multi-pass echo residue detection with speech application... Multi-pass echo residue detection with speech application...

2005-09-12

2011-10-18

Smits, Talivaldis Ivars (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

C704S226000

Reexamination Certificate

active

08041564

ABSTRACT:
Echo residue is detected using speech application data. The echo residue is detected using a method that includes correlating audio data from an input channel with audio data from an output channel to obtain a correlation result. A determined value of the correlation result is compared with a predetermined threshold. The audio data for the input channel is categorized in a first category when the determined value of the correlation result is greater than the predetermined threshold. The audio data for the input channel is categorized in a second category when the determined value of the correlation result is less than the predetermined threshold. The first category includes audio data that is determined to include an acceptable level of residual echo. The second category includes audio data that is determined to include an unacceptable level of residual echo.

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U.S. Appl. No. 11/211,640 Wong, filed Aug. 26, 2005.

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