DE2207141B2 - - Google Patents
Info
- Publication number
- DE2207141B2 DE2207141B2 DE2207141A DE2207141A DE2207141B2 DE 2207141 B2 DE2207141 B2 DE 2207141B2 DE 2207141 A DE2207141 A DE 2207141A DE 2207141 A DE2207141 A DE 2207141A DE 2207141 B2 DE2207141 B2 DE 2207141B2
- Authority
- DE
- Germany
- Prior art keywords
- signal
- speech
- speech signal
- parameters
- circuit
- 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
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 238000009795 derivation Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 description 11
- 208000019300 CLIPPERS Diseases 0.000 description 9
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000001629 suppression Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 206010011878 Deafness Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010370 hearing loss Effects 0.000 description 1
- 231100000888 hearing loss Toxicity 0.000 description 1
- 208000016354 hearing loss disease Diseases 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/087—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
-
- 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
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
-
- 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
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
- G10L2021/02087—Noise filtering the noise being separate speech, e.g. cocktail party
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephone Function (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20450971A | 1971-12-03 | 1971-12-03 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2207141A1 DE2207141A1 (de) | 1973-08-02 |
| DE2207141B2 true DE2207141B2 (enrdf_load_stackoverflow) | 1980-10-09 |
| DE2207141C3 DE2207141C3 (de) | 1981-07-30 |
Family
ID=22758195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2207141A Expired DE2207141C3 (de) | 1971-12-03 | 1972-12-16 | Schaltungsanordnung zur Unterdrückung unerwünschter Sprachsignale mittels eines vorhersagenden Filters |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3784747A (enrdf_load_stackoverflow) |
| JP (1) | JPS55760B2 (enrdf_load_stackoverflow) |
| CA (1) | CA952439A (enrdf_load_stackoverflow) |
| DE (1) | DE2207141C3 (enrdf_load_stackoverflow) |
| GB (1) | GB1369711A (enrdf_load_stackoverflow) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1458663A (en) * | 1972-12-15 | 1976-12-15 | Ard Anstalt | Microphone circuits |
| US4024358A (en) * | 1975-10-31 | 1977-05-17 | Communications Satellite Corporation (Comsat) | Adaptive echo canceller using differential pulse code modulation encoding |
| US4031338A (en) * | 1976-02-10 | 1977-06-21 | Communications Satellite Corporation (Comsat) | Echo suppressor using frequency-selective center clipping |
| US4122303A (en) * | 1976-12-10 | 1978-10-24 | Sound Attenuators Limited | Improvements in and relating to active sound attenuation |
| US4166924A (en) * | 1977-05-12 | 1979-09-04 | Bell Telephone Laboratories, Incorporated | Removing reverberative echo components in speech signals |
| CA1123955A (en) * | 1978-03-30 | 1982-05-18 | Tetsu Taguchi | Speech analysis and synthesis apparatus |
| FR2451676A1 (fr) * | 1979-03-12 | 1980-10-10 | Soumagne Joel | Detecteur d'echo notamment pour systeme de communication a interpolation de parole |
| US4473906A (en) * | 1980-12-05 | 1984-09-25 | Lord Corporation | Active acoustic attenuator |
| JPS583430A (ja) * | 1981-06-30 | 1983-01-10 | Nec Corp | まわり込信号抑圧装置 |
| JPH069000B2 (ja) * | 1981-08-27 | 1994-02-02 | キヤノン株式会社 | 音声情報処理方法 |
| JPS5961321A (ja) * | 1982-09-30 | 1984-04-07 | Nec Corp | エコ−信号抑圧装置 |
| DE3364531D1 (en) * | 1982-10-15 | 1986-08-21 | British Telecomm | Noise control circuit |
| US4629829A (en) * | 1984-12-14 | 1986-12-16 | Motorola, Inc. | Full duplex speakerphone for radio and landline telephones |
| US4819263A (en) * | 1986-06-30 | 1989-04-04 | Cellular Communications Corporation | Apparatus and method for hands free telephonic communication |
| CA2049173C (en) * | 1990-08-16 | 1996-06-25 | Shoji Fujimoto | Speech recognition apparatus |
| GB2281680B (en) * | 1993-08-27 | 1998-08-26 | Motorola Inc | A voice activity detector for an echo suppressor and an echo suppressor |
| JP3289057B2 (ja) * | 1996-02-06 | 2002-06-04 | 品川白煉瓦株式会社 | 浸漬ノズル交換装置 |
| EP0881814A1 (de) * | 1997-05-28 | 1998-12-02 | Deutsche Telekom AG | Verfahren zur Bestimmung des Schrifttweitenfaktors Alpha zur Einstellung der Adaptionsgeschwindigkeit des NMLS-Adaptionsalgorithmus |
| SG71035A1 (en) * | 1997-08-01 | 2000-03-21 | Bitwave Pte Ltd | Acoustic echo canceller |
| US6442275B1 (en) | 1998-09-17 | 2002-08-27 | Lucent Technologies Inc. | Echo canceler including subband echo suppressor |
| DE19942868A1 (de) | 1999-09-08 | 2001-03-15 | Volkswagen Ag | Verfahren zum Betrieb einer Mehrfachmikrofonanordnung in einem Kraftfahrzeug sowie Mehrfachmikrofonanordnung selbst |
| US6243322B1 (en) * | 1999-11-05 | 2001-06-05 | Wavemakers Research, Inc. | Method for estimating the distance of an acoustic signal |
| US7043014B2 (en) * | 2002-05-22 | 2006-05-09 | Avaya Technology Corp. | Apparatus and method for time-alignment of two signals |
| US7027593B2 (en) * | 2002-05-22 | 2006-04-11 | Avaya Technology Corp. | Apparatus and method for echo control |
| US7734034B1 (en) | 2005-06-21 | 2010-06-08 | Avaya Inc. | Remote party speaker phone detection |
| EP3806489A4 (en) | 2018-06-11 | 2021-08-11 | Sony Group Corporation | SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD AND PROGRAM |
| CN112203188B (zh) * | 2020-07-24 | 2021-10-01 | 北京工业大学 | 一种自动音量调节方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3177489A (en) * | 1960-01-11 | 1965-04-06 | Thompson Ramo Wooldridge Inc | Interference suppression systems |
| US3133990A (en) * | 1962-04-27 | 1964-05-19 | Altec Lansing Corp | Automatic level-adjustment circuit |
| GB1172089A (en) * | 1965-09-29 | 1969-11-26 | Superior Continental Corp | A Communication System |
| US3631520A (en) * | 1968-08-19 | 1971-12-28 | Bell Telephone Labor Inc | Predictive coding of speech signals |
| US3644674A (en) * | 1969-06-30 | 1972-02-22 | Bell Telephone Labor Inc | Ambient noise suppressor |
| US3601549A (en) * | 1969-11-25 | 1971-08-24 | Bell Telephone Labor Inc | Switching circuit for cancelling the direct sound transmission from the loudspeaker to the microphone in a loudspeaking telephone set |
-
1971
- 1971-12-03 US US00204509A patent/US3784747A/en not_active Expired - Lifetime
-
1972
- 1972-01-27 GB GB382872A patent/GB1369711A/en not_active Expired
- 1972-02-18 JP JP1655372A patent/JPS55760B2/ja not_active Expired
- 1972-03-29 CA CA138,445A patent/CA952439A/en not_active Expired
- 1972-12-16 DE DE2207141A patent/DE2207141C3/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1369711A (en) | 1974-10-09 |
| JPS55760B2 (enrdf_load_stackoverflow) | 1980-01-09 |
| US3784747A (en) | 1974-01-08 |
| DE2207141C3 (de) | 1981-07-30 |
| CA952439A (en) | 1974-08-06 |
| JPS4865813A (enrdf_load_stackoverflow) | 1973-09-10 |
| DE2207141A1 (de) | 1973-08-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OD | Request for examination | ||
| C3 | Grant after two publication steps (3rd publication) | ||
| 8339 | Ceased/non-payment of the annual fee |