Voice Activity Detector

Abstract

The present invention relates to a speech activity detector for providing a signal for the purpose of detecting a speech period or a period comprising only noise. Speech is distinguished from noise by spectral comparisons 114 and 115 comparing the input signal with the stored noise estimate 113, and the update of the noise estimate (of the buffer 113) is under the control of the auxiliary detector 200. Obtained from an input involving filtering by a filter 105 that is allowed for a period of time that does not, and has a response that compensates for the frequency component of the input to improve operation for a signal having a strong harmonic component (e.g., a beep). The LPC prediction gain is calculated from the input x (i) and the remainder y (i), and the buffer update is suppressed if the gain exceeds the threshold.

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CA2169745A1	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	Yes	Basis Patent
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CA2169745C	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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EP0719439A1	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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EP0719439B1	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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HK1014392A1	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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HU219994B	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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HUT73986A	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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NZ273045A	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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SG48935A1	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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SK281796B6	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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SK31896A3	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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FI118195B	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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FI961158A	Not Available	21/07/1995	ISLD-190001-033	LG	S1 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S2 TS Number: 6 Version No: -- Section No: -- Release : -- S3 TS Number: ETS 300 581 Version No: -- Section No: -- Release : -- S4 TS Number: 7 Version No: -- Section No: -- Release : -- +3 -3	No	Family Member
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Publication No	Technology	Declaration Information			Specification Information				Explicitly Disclosed	Patent Type	Status	National Phase Entries
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