EP1393302A1 - Method and device for automatically differentiating and/or detecting acoustic signals - Google Patents
Method and device for automatically differentiating and/or detecting acoustic signalsInfo
- Publication number
- EP1393302A1 EP1393302A1 EP02737775A EP02737775A EP1393302A1 EP 1393302 A1 EP1393302 A1 EP 1393302A1 EP 02737775 A EP02737775 A EP 02737775A EP 02737775 A EP02737775 A EP 02737775A EP 1393302 A1 EP1393302 A1 EP 1393302A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- comparison value
- reflection coefficient
- reference value
- exceeded
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001419 dependent effect Effects 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 9
- 230000004069 differentiation Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 206010002953 Aphonia Diseases 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 4
- 238000007619 statistical method Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/78—Detection of presence or absence of voice signals
Definitions
- the invention relates to a method and apparatus for automatically differentiating and / or detecting acoustic signals, said at least partially statistically analy ⁇ Siert and their reflection coefficients of at least one order are calculated.
- the statistical analysis of microphone signals for voice detection is generally known. This statistical analysis calculates, among other things, reflection coefficients that make it possible to make statements about the presence of a speech signal.
- the response time of such a system is naturally relatively slow, since a complete loop of the number of reflection coefficients must be completed before a decision is made.
- ⁇ is an example of a corresponding program, type according to the requirements of the above US Patent.
- the inventor has recognized that it is not absolutely necessary to calculate the prediction error over all reflection coefficients, but that it is sufficient to make the decision to differentiate and / or detect acoustic signals on the basis of only a selected reflection coefficient. It should be noted that acoustic
- the inventor proposes the method for automatic ⁇ tables differentiation and / or detecting acoustic Signa ⁇ le, which at least partially analyzed statistically and whose reflection coefficients are calculated at least one order, the effect to improve, that a comparison value is calculated solely from depends on a single reflection coefficient, and this is compared with at least one predetermined reference value.
- the sign of the reflection coefficient can be eliminated when calculating the comparison value, this being possible, for example, by forming the amount of the reflection coefficient or calculating the square of the reflection coefficient.
- an upper and a lower limit can be specified as a reference value, so that breaking out the comparison value from these barriers also leads to a positive detection.
- the presence or absence of a speech activity can also be advantageously decided when the comparison value for at least one reference value is exceeded or undershot.
- this method can also be used to determine whether the transmitted speech is voiced or unvoiced or to distinguish between tonal and non-tonal signals, for example the presence of DTMF signals.
- the inventor also proposes an apparatus for automatically differentiating and / or detecting acoustic signals, in particular in digital voice transmission systems, which means for at least partially ⁇ have statistical analysis of the acoustic signals and for calculating the reflection coefficient of at least one Ord ⁇ voltage comprise to be improved in that a means for calculating a comparison value is provided, the comparison value being dependent solely on a single reflection coefficient, and furthermore a means for comparing the comparison value with at least one predetermined reference value is provided.
- means for eliminating the sign of the reflection coefficient can also be provided here, which can be, for example, a means for calculating the amount of the reflection coefficient or for calculating the square of the reflection coefficient.
- a means of deciding between voicelessness and voicelessness or of tonal or non-tonal signals can also be provided, depending on whether the comparison value of the at least one reference value is exceeded or undershot.
- the specified means can either be a corresponding circuit arrangement or program Modules that are processed in a computer or processor.
- the inventor also proposes a computer program product with program means to carry out at least the steps according to at least one of the preceding method claims when the program means are executed on a computer or processor.
- the reflection coefficients reflectioncoeff [k] must be calculated beforehand in a known manner and the threshold value THRESHOLD must be defined beforehand.
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Complex Calculations (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10121532A DE10121532A1 (en) | 2001-05-03 | 2001-05-03 | Method and device for automatic differentiation and / or detection of acoustic signals |
DE10121532 | 2001-05-03 | ||
PCT/DE2002/001277 WO2002091354A1 (en) | 2001-05-03 | 2002-04-08 | Method and device for automatically differentiating and/or detecting acoustic signals |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1393302A1 true EP1393302A1 (en) | 2004-03-03 |
EP1393302B1 EP1393302B1 (en) | 2004-09-29 |
Family
ID=7683502
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02737775A Expired - Fee Related EP1393302B1 (en) | 2001-05-03 | 2002-04-08 | Method and device for automatically differentiating and/or detecting acoustic signals |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040148168A1 (en) |
EP (1) | EP1393302B1 (en) |
CN (1) | CN1507616A (en) |
DE (2) | DE10121532A1 (en) |
WO (1) | WO2002091354A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20045315A (en) * | 2004-08-30 | 2006-03-01 | Nokia Corp | Detection of voice activity in an audio signal |
CN101322182B (en) * | 2005-12-05 | 2011-11-23 | 高通股份有限公司 | Systems, methods, and apparatus for detection of tonal components |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5341456A (en) * | 1992-12-02 | 1994-08-23 | Qualcomm Incorporated | Method for determining speech encoding rate in a variable rate vocoder |
IN184794B (en) * | 1993-09-14 | 2000-09-30 | British Telecomm | |
FR2734389B1 (en) * | 1995-05-17 | 1997-07-18 | Proust Stephane | METHOD FOR ADAPTING THE NOISE MASKING LEVEL IN A SYNTHESIS-ANALYZED SPEECH ENCODER USING A SHORT-TERM PERCEPTUAL WEIGHTING FILTER |
JP3522012B2 (en) * | 1995-08-23 | 2004-04-26 | 沖電気工業株式会社 | Code Excited Linear Prediction Encoder |
JPH09152894A (en) * | 1995-11-30 | 1997-06-10 | Denso Corp | Sound and silence discriminator |
US6510407B1 (en) * | 1999-10-19 | 2003-01-21 | Atmel Corporation | Method and apparatus for variable rate coding of speech |
CA2469674C (en) * | 2002-09-19 | 2012-04-24 | Matsushita Electric Industrial Co., Ltd. | Audio decoding apparatus and method |
-
2001
- 2001-05-03 DE DE10121532A patent/DE10121532A1/en not_active Withdrawn
-
2002
- 2002-04-08 WO PCT/DE2002/001277 patent/WO2002091354A1/en active IP Right Grant
- 2002-04-08 US US10/476,747 patent/US20040148168A1/en not_active Abandoned
- 2002-04-08 DE DE50201179T patent/DE50201179D1/en not_active Expired - Lifetime
- 2002-04-08 EP EP02737775A patent/EP1393302B1/en not_active Expired - Fee Related
- 2002-04-08 CN CNA028092694A patent/CN1507616A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO02091354A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1507616A (en) | 2004-06-23 |
WO2002091354A1 (en) | 2002-11-14 |
EP1393302B1 (en) | 2004-09-29 |
DE10121532A1 (en) | 2002-11-07 |
DE50201179D1 (en) | 2004-11-04 |
US20040148168A1 (en) | 2004-07-29 |
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