CA952439A - Speech suppression by predictive filtering - Google Patents
Speech suppression by predictive filteringInfo
- Publication number
- CA952439A CA952439A CA138,445A CA138445A CA952439A CA 952439 A CA952439 A CA 952439A CA 138445 A CA138445 A CA 138445A CA 952439 A CA952439 A CA 952439A
- Authority
- CA
- Canada
- Prior art keywords
- predictive filtering
- speech suppression
- speech
- suppression
- predictive
- 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.)
- Expired
Links
- 238000001914 filtration Methods 0.000 title 1
- 230000001629 suppression Effects 0.000 title 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 (1)
Publication Number | Publication Date |
---|---|
CA952439A true CA952439A (en) | 1974-08-06 |
Family
ID=22758195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA138,445A Expired CA952439A (en) | 1971-12-03 | 1972-03-29 | Speech suppression by predictive filtering |
Country Status (5)
Country | Link |
---|---|
US (1) | US3784747A (en) |
JP (1) | JPS55760B2 (en) |
CA (1) | CA952439A (en) |
DE (1) | DE2207141C3 (en) |
GB (1) | GB1369711A (en) |
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 (en) * | 1979-03-12 | 1980-10-10 | Soumagne Joel | ECHO DETECTOR IN PARTICULAR FOR SPEECH INTERPOLATION COMMUNICATION SYSTEM |
US4473906A (en) * | 1980-12-05 | 1984-09-25 | Lord Corporation | Active acoustic attenuator |
JPS583430A (en) * | 1981-06-30 | 1983-01-10 | Nec Corp | Suppressing device of detouring signal |
JPH069000B2 (en) * | 1981-08-27 | 1994-02-02 | キヤノン株式会社 | Voice information processing method |
JPS5961321A (en) * | 1982-09-30 | 1984-04-07 | Nec Corp | Echo signal suppressor |
EP0106640B1 (en) * | 1982-10-15 | 1986-07-16 | British Telecommunications | 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 |
EP0820825A4 (en) * | 1996-02-06 | 1999-03-03 | Shinagawa Refractories Co | Immersion nozzle replacement apparatus |
EP0881814A1 (en) * | 1997-05-28 | 1998-12-02 | Deutsche Telekom AG | Method for determining the step size Alpha for adjusting the convergence speed in the NLMS algorithm |
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 (en) | 1999-09-08 | 2001-03-15 | Volkswagen Ag | Method for operating a multiple microphone arrangement in a motor vehicle and a multiple microphone arrangement itself |
US6243322B1 (en) * | 1999-11-05 | 2001-06-05 | Wavemakers Research, Inc. | Method for estimating the distance of an acoustic signal |
US7027593B2 (en) * | 2002-05-22 | 2006-04-11 | Avaya Technology Corp. | Apparatus and method for echo control |
US7043014B2 (en) * | 2002-05-22 | 2006-05-09 | Avaya Technology Corp. | Apparatus and method for time-alignment of two signals |
US7734034B1 (en) | 2005-06-21 | 2010-06-08 | Avaya Inc. | Remote party speaker phone detection |
CN112237008B (en) * | 2018-06-11 | 2022-06-03 | 索尼公司 | Signal processing apparatus, signal processing method, and computer-readable storage medium |
CN112203188B (en) * | 2020-07-24 | 2021-10-01 | 北京工业大学 | Automatic volume adjusting method |
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/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS4865813A (en) | 1973-09-10 |
DE2207141C3 (en) | 1981-07-30 |
DE2207141A1 (en) | 1973-08-02 |
US3784747A (en) | 1974-01-08 |
GB1369711A (en) | 1974-10-09 |
DE2207141B2 (en) | 1980-10-09 |
JPS55760B2 (en) | 1980-01-09 |
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