RU95107694A - METHOD FOR RECOGNIZING STATIONARY AND NON-STATIONARY SIGNALS, METHOD FOR DETECTING AND CODING AND / OR DECODING STATIONARY BACKGROUND SOUNDS AND DEVICE FOR CODING AND / OR DECODING OF STATIONARY BACKGROUND SOUNDS - Google Patents
METHOD FOR RECOGNIZING STATIONARY AND NON-STATIONARY SIGNALS, METHOD FOR DETECTING AND CODING AND / OR DECODING STATIONARY BACKGROUND SOUNDS AND DEVICE FOR CODING AND / OR DECODING OF STATIONARY BACKGROUND SOUNDSInfo
- Publication number
- RU95107694A RU95107694A RU95107694/09A RU95107694A RU95107694A RU 95107694 A RU95107694 A RU 95107694A RU 95107694/09 A RU95107694/09 A RU 95107694/09A RU 95107694 A RU95107694 A RU 95107694A RU 95107694 A RU95107694 A RU 95107694A
- Authority
- RU
- Russia
- Prior art keywords
- stationary
- background sounds
- signal
- variation
- time
- Prior art date
Links
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000000875 corresponding Effects 0.000 claims 1
Claims (1)
(а) оценивают один из статистических моментов сигнала в каждом из N временных подокон Тi, где N>2, временного окна Т заранее определенной длительности,
(б) оценивают вариацию оценок, полученных при операции (а), как меру стационарности сигнала,
(в) определяют, не превышает ли оцененная при операции (б) вариация заранее определенного предела γ стационарности.1. The method of recognition of stationary and non-stationary signals, such as signals representing background sounds in mobile radio communication systems, characterized in that
(a) evaluate one of the statistical moments of the signal in each of N time sub windows T i , where N> 2, time window T of a predetermined duration,
(b) evaluate the variation of the estimates obtained during operation (a), as a measure of the stationarity of the signal,
(c) determine whether the variation estimated in step (b) exceeds the stationarity limit of a predetermined limit γ.
6. Способ по п.4, отличающийся тем, что оцененную вариацию образуют в соответствии с формулой
где БУФ. МАКС. представляет собой буфер, содержащий только наибольшие последние оценки энергии;
БУФ. МИН. - буфер, содержащий только наименьшие последние оценки энергии.5. The method according to claim 4, characterized in that the estimated variation is formed in accordance with the formula
6. The method according to claim 4, characterized in that the estimated variation is formed in accordance with the formula
where is the buf. MAX. It is a buffer containing only the largest recent energy estimates;
BUF. MIN - A buffer containing only the lowest recent energy estimates.
(а) определяют, представляет ли собой сигнал, поступающий на упомянутый кодер/декодер, в основном речь или фоновые звуки,
(б) если сигнал, поступающий на кодер/декодер, представляет собой фоновые звуки, то определяют, являются ли эти фоновые звуки стационарными,
(в) если сигнал является стационарным, то ограничивают изменения во времени от одного кадра к другому по меньшей мере некоторых параметров фильтра в указанной группе параметров и/или область значений этих некоторых параметров фильтра.10. A method for detecting and encoding and / or decoding stationary background sounds in an encoder and / or decoder of speech signals operating on the basis of digital frames and including a signal source connected to a filter defined by a group of filter parameters for each frame to reproduce the signal to be encoded and / or decoding, characterized in that
(a) determining whether the signal arriving at said encoder / decoder is mainly speech or background sounds,
(b) if the signal arriving at the encoder / decoder is background sounds, then it is determined whether these background sounds are stationary,
(c) if the signal is stationary, then the time changes from one frame to another of at least some filter parameters in the specified group of parameters and / or the range of values of these certain filter parameters are limited.
(б1) оценивают один из статистических моментов фоновых звуков в каждом из N временных подокон Ti, где N>2, временного окна Т заранее определенной длительности,
(б2) оценивают вариацию оценок, полученных при операции (б1), как меру стационарности фоновых звуков,
(б3) определяют, превышает ли оцененная вариация, полученная при операции (б2), заранее определенный предел стационарности γ.11. The method according to claim 10, characterized in that when determining stationarity
(b 1 ) evaluate one of the statistical moments of the background sounds in each of N time sub windows T i , where N> 2, time window T of a predetermined duration,
(b 2 ) evaluate the variation of the estimates obtained during operation (b 1 ), as a measure of the stationarity of background sounds,
(b 3 ) determine whether the estimated variation obtained in operation (b 2 ) exceeds the predetermined stationarity limit γ.
14. Способ по п.12, отличающийся тем, что оцененную вариацию образуют в соответствии с формулой
где БУФ. МАКС. представляет собой буфер, содержащий только наибольшие последние оценки энергии;
БУФ. МИН. - буфер, содержащий только наименьшие последние оценки энергии.13. The method according to p. 12, characterized in that the estimated variation is formed in accordance with the formula
14. The method according to p. 12, characterized in that the estimated variation is formed in accordance with the formula
where is the buf. MAX. It is a buffer containing only the largest recent energy estimates;
BUF. MIN - A buffer containing only the lowest recent energy estimates.
(а) средства (16, 34) определения того, представляет ли сигнал, подаваемый на кодер/декодер, в основном речь или фоновые звуки,
(б) средства (24, 24') определения того, является ли фоновый звук стационарным, если сигнал, подаваемый на кодер/декодер представляет фоновый звук, и
(в) средства (18, 36) ограничения изменений во времени от одного кадра к другому по меньшей мере некоторых параметров фильтра в указанной группе параметров и/или ограничения области значений этих некоторых параметров фильтра.18. A device for encoding and / or decoding stationary background sounds in an encoder and / or decoder of speech signals operating on the basis of digital frames and including a signal source connected to a filter defined by a group of filter parameters for each frame to reproduce the signal to be encoded and / or decoding, characterized in that it contains
(a) means (16, 34) for determining whether the signal supplied to the encoder / decoder is mainly speech or background sounds,
(b) means (24, 24 ') for determining whether the background sound is stationary if the signal supplied to the encoder / decoder represents the background sound, and
(c) means (18, 36) of restricting the time changes from one frame to another of at least some filter parameters in the specified group of parameters and / or limiting the range of values of these certain filter parameters.
(б1) средства (50) оценки одного из статистических моментов фоновых звуков в каждом из N временных подокон Тi , где N>2, временного окна Т заранее определенной длительности,
(б2) средства (54) оценки вариации оценок как меры стационарности фонового звука и
(б3) средства (56) определения того, превышает ли оцененная вариация заранее определенный предел γ стационарности.19. The device according to p, characterized in that the said means for determining stationarity contain:
(b 1 ) means (50) evaluating one of the statistical moments of the background sounds in each of the N time sub-windows T i , where N> 2, the time window T of a predetermined duration,
(b 2 ) means (54) estimating variation of estimates as a measure of the stationarity of the background sound
(b 3 ) means (56) for determining whether the estimated variation exceeds a predetermined stationarity limit γ.
22. Устройство по п.20, отличающееся тем, что оно содержит средства (58) управления первым буфером БУФ. МАКС. и вторым буфером БУФ. МИН. для хранения в них только последних больших и малых оценок энергии соответственно.21. The device according to claim 20, characterized in that the estimated variation is formed in accordance with the formula
22. The device according to claim 20, characterized in that it contains means (58) for controlling the first buffer of the BUF. MAX. and the second buffer of the BUF. MIN to store in them only the latest large and small energy estimates, respectively.
з24. The device according to p. 23, characterized in that the estimated variation is formed in accordance with the formula
s
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9301798A SE501305C2 (en) | 1993-05-26 | 1993-05-26 | Method and apparatus for discriminating between stationary and non-stationary signals |
SE9301798-6 | 1993-05-26 | ||
PCT/SE1994/000443 WO1994028542A1 (en) | 1993-05-26 | 1994-05-11 | Discriminating between stationary and non-stationary signals |
Publications (2)
Publication Number | Publication Date |
---|---|
RU95107694A true RU95107694A (en) | 1998-02-20 |
RU2127912C1 RU2127912C1 (en) | 1999-03-20 |
Family
ID=20390059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
RU95107694A RU2127912C1 (en) | 1993-05-26 | 1994-05-11 | Method for detection and encoding and/or decoding of stationary background sounds and device for detection and encoding and/or decoding of stationary background sounds |
Country Status (19)
Country | Link |
---|---|
US (1) | US5579432A (en) |
EP (1) | EP0653091B1 (en) |
JP (1) | JPH07509792A (en) |
KR (1) | KR100220377B1 (en) |
CN (2) | CN1046366C (en) |
AU (2) | AU670383B2 (en) |
CA (1) | CA2139628A1 (en) |
DE (1) | DE69421498T2 (en) |
DK (1) | DK0653091T3 (en) |
ES (1) | ES2141234T3 (en) |
FI (1) | FI950311A0 (en) |
GR (1) | GR3032107T3 (en) |
HK (1) | HK1013881A1 (en) |
NZ (1) | NZ266908A (en) |
RU (1) | RU2127912C1 (en) |
SE (1) | SE501305C2 (en) |
SG (1) | SG46977A1 (en) |
TW (1) | TW324123B (en) |
WO (1) | WO1994028542A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2317084B (en) * | 1995-04-28 | 2000-01-19 | Northern Telecom Ltd | Methods and apparatus for distinguishing speech intervals from noise intervals in audio signals |
AUPO170196A0 (en) * | 1996-08-16 | 1996-09-12 | University Of Alberta | A finite-dimensional filter |
US6058359A (en) * | 1998-03-04 | 2000-05-02 | Telefonaktiebolaget L M Ericsson | Speech coding including soft adaptability feature |
DE10026872A1 (en) | 2000-04-28 | 2001-10-31 | Deutsche Telekom Ag | Procedure for calculating a voice activity decision (Voice Activity Detector) |
EP1279164A1 (en) | 2000-04-28 | 2003-01-29 | Deutsche Telekom AG | Method for detecting a voice activity decision (voice activity detector) |
JP3812887B2 (en) * | 2001-12-21 | 2006-08-23 | 富士通株式会社 | Signal processing system and method |
CA2420129A1 (en) * | 2003-02-17 | 2004-08-17 | Catena Networks, Canada, Inc. | A method for robustly detecting voice activity |
PL2118889T3 (en) | 2007-03-05 | 2013-03-29 | Ericsson Telefon Ab L M | Method and controller for smoothing stationary background noise |
US8457953B2 (en) | 2007-03-05 | 2013-06-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement for smoothing of stationary background noise |
CN101308651B (en) * | 2007-05-17 | 2011-05-04 | 展讯通信(上海)有限公司 | Detection method of audio transient signal |
CN101546556B (en) * | 2008-03-28 | 2011-03-23 | 展讯通信(上海)有限公司 | Classification system for identifying audio content |
KR101826331B1 (en) * | 2010-09-15 | 2018-03-22 | 삼성전자주식회사 | Apparatus and method for encoding and decoding for high frequency bandwidth extension |
CA2981539C (en) | 2010-12-29 | 2020-08-25 | Samsung Electronics Co., Ltd. | Apparatus and method for encoding/decoding for high-frequency bandwidth extension |
US10230346B2 (en) | 2011-01-10 | 2019-03-12 | Zhinian Jing | Acoustic voice activity detection |
US10325588B2 (en) | 2017-09-28 | 2019-06-18 | International Business Machines Corporation | Acoustic feature extractor selected according to status flag of frame of acoustic signal |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4544919A (en) * | 1982-01-03 | 1985-10-01 | Motorola, Inc. | Method and means of determining coefficients for linear predictive coding |
GB2137791B (en) * | 1982-11-19 | 1986-02-26 | Secr Defence | Noise compensating spectral distance processor |
DE3370423D1 (en) * | 1983-06-07 | 1987-04-23 | Ibm | Process for activity detection in a voice transmission system |
DE68929442T2 (en) * | 1988-03-11 | 2003-10-02 | British Telecomm | Device for recording speech sounds |
US5276765A (en) * | 1988-03-11 | 1994-01-04 | British Telecommunications Public Limited Company | Voice activity detection |
GB2239971B (en) * | 1989-12-06 | 1993-09-29 | Ca Nat Research Council | System for separating speech from background noise |
EP0538536A1 (en) * | 1991-10-25 | 1993-04-28 | International Business Machines Corporation | Method for detecting voice presence on a communication line |
SE470577B (en) * | 1993-01-29 | 1994-09-19 | Ericsson Telefon Ab L M | Method and apparatus for encoding and / or decoding background noise |
US5459814A (en) * | 1993-03-26 | 1995-10-17 | Hughes Aircraft Company | Voice activity detector for speech signals in variable background noise |
-
1993
- 1993-05-26 SE SE9301798A patent/SE501305C2/en not_active IP Right Cessation
-
1994
- 1994-05-11 DE DE69421498T patent/DE69421498T2/en not_active Expired - Fee Related
- 1994-05-11 TW TW083104232A patent/TW324123B/en active
- 1994-05-11 KR KR1019950700299A patent/KR100220377B1/en not_active IP Right Cessation
- 1994-05-11 ES ES94917227T patent/ES2141234T3/en not_active Expired - Lifetime
- 1994-05-11 WO PCT/SE1994/000443 patent/WO1994028542A1/en active IP Right Grant
- 1994-05-11 CA CA002139628A patent/CA2139628A1/en not_active Abandoned
- 1994-05-11 JP JP7500526A patent/JPH07509792A/en active Pending
- 1994-05-11 CN CN94190318A patent/CN1046366C/en not_active Expired - Fee Related
- 1994-05-11 RU RU95107694A patent/RU2127912C1/en active
- 1994-05-11 NZ NZ266908A patent/NZ266908A/en unknown
- 1994-05-11 DK DK94917227T patent/DK0653091T3/en active
- 1994-05-11 AU AU69016/94A patent/AU670383B2/en not_active Ceased
- 1994-05-11 SG SG1996000608A patent/SG46977A1/en unknown
- 1994-05-11 EP EP94917227A patent/EP0653091B1/en not_active Expired - Lifetime
- 1994-05-25 US US08/248,714 patent/US5579432A/en not_active Expired - Fee Related
-
1995
- 1995-01-24 FI FI950311A patent/FI950311A0/en unknown
-
1996
- 1996-03-14 AU AU48112/96A patent/AU681551B2/en not_active Ceased
-
1997
- 1997-01-06 CN CN97101022A patent/CN1218945A/en active Pending
-
1998
- 1998-12-23 HK HK98115224A patent/HK1013881A1/en not_active IP Right Cessation
-
1999
- 1999-12-13 GR GR990403198T patent/GR3032107T3/en unknown
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