PE46097A1 - METHOD AND APPARATUS TO REDUCE THE RESIDUAL ECO FROM THE DISTANT END, IN VOICE COMMUNICATION NETWORKS - Google Patents
METHOD AND APPARATUS TO REDUCE THE RESIDUAL ECO FROM THE DISTANT END, IN VOICE COMMUNICATION NETWORKSInfo
- Publication number
- PE46097A1 PE46097A1 PE1996000143A PE00014396A PE46097A1 PE 46097 A1 PE46097 A1 PE 46097A1 PE 1996000143 A PE1996000143 A PE 1996000143A PE 00014396 A PE00014396 A PE 00014396A PE 46097 A1 PE46097 A1 PE 46097A1
- Authority
- PE
- Peru
- Prior art keywords
- signals
- pattern
- distant end
- attenuated
- copy
- Prior art date
Links
Classifications
-
- 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
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Dc Digital Transmission (AREA)
Abstract
METODO CARACTERIZADO PORQUE COMPRENDE: A) MEDIR UN RETRASO ENTRE SENALES CERCANAS Y LA LLEGADA DE LOS ECOS CORRESPONDIENTES EN LAS SENALES DEL EXTREMO DISTANTE; B) PROCESAR UNA COPIA DE LAS SENALES DEL EXTREMO CERCANO PARA CREAR UNA SENAL QUE VARIA CON EL TIEMPO QUE REPRESENTA EL CONTENIDO DE ENERGIA ATENUADO DE DICHAS SENALES, COMO UN PATRON; C) HACER PASAR LAS SENALES DEL EXTREMO DISTANTE POR UN PROCESADOR NO LINEAL, SIN SER ATENUADAS DEMASIADO SI ES QUE SOBREPASAN EL PATRON; Y D) ATENUAR LAS SENALES DEL EXTREMO DISTANTE EN EL PROCESADOR NO LINEAL, SI ES QUE SE ENCUENTRAN DENTRO DE UN INTERVALO DEFINIDO POR DEBAJO DEL PATRON. EL APARATO COMPRENDE: A) UN MEDIO PARA MEDIR UN RETRASO ENTRE LAS SENALES DEL EXTREMO CERCANO Y LA LLEGADA DE LOS ECOS CORRESPONDIENTES EN DICHAS SENALES; B) UN MEDIO PARA RECIBIR UNA COPIA DE DICHAS SENALES Y PARA PROCESAR DICHA COPIA A FIN DE CREAR UNA SENAL DE SALIDA QUE VARIA CON EL TIEMPO COMO UN PATRON, QUE REPRESENTA EL CONTENIDO DE ENERGIA ATENUADO DE LAS SENALES RETRASADAS Y ATENUADAS; Y C) UN PROCESADOR NO LINEAL ADAPTADO PARA HACER PASAR LAS SENALES DEL EXTREMO DISTANTE SUSTANCIALMENTE SIN ATENUAR SI ES QUE SOBREPASAN EL PATRON Y PARA ATENUAR LAS SENALES SI ES QUE SE ENCUENTRAN DENTRO DE UN INTERVALO DEFINIDO POR DEBAJO DEL PATRONMETHOD CHARACTERIZED BECAUSE IT INCLUDES: A) MEASURING A DELAY BETWEEN NEARBY SIGNALS AND THE ARRIVAL OF THE CORRESPONDING ECHOES IN THE SIGNALS OF THE DISTANT END; B) PROCESS A COPY OF THE SIGNALS OF THE NEAREST END TO CREATE A SIGNAL THAT VARY WITH THE TIME THAT REPRESENTS THE ATTENUATED ENERGY CONTENT OF SUCH SIGNALS, AS A PATTERN; C) PASS THE SIGNALS OF THE DISTANT END BY A NON-LINEAR PROCESSOR, WITHOUT BEING ATTENUATED IF THEY OVERCOME THE PATTERN; AND D) ATTENUATE THE SIGNALS OF THE DISTANT END IN THE NON-LINEAR PROCESSOR, IF THEY ARE FOUND WITHIN AN INTERVAL DEFINED BELOW THE PATTERN. THE DEVICE INCLUDES: A) A MEANS TO MEASURE A DELAY BETWEEN THE SIGNALS OF THE NEAREST END AND THE ARRIVAL OF THE CORRESPONDING ECHOES IN SUCH SIGNALS; B) A MEANS TO RECEIVE A COPY OF SUCH SIGNALS AND TO PROCESS SUCH COPY IN ORDER TO CREATE A STARTING SIGNAL THAT CHANGES OVER TIME AS A PATTERN, REPRESENTING THE ATTENUATED ENERGY CONTENT OF THE DELAYED AND ATTENUATED SIGNALS; AND C) A NON-LINEAR PROCESSOR ADAPTED TO PASS THE SIGNALS OF THE DISTANT END SUBSTANTIALLY WITHOUT DUTYING IF THEY OVERCOME THE PATTERN AND TO DUTY THE SIGNALS IF THEY ARE FOUND WITHIN A DEFINED INTERVAL BELOW THE PATTERN
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/398,272 US5587998A (en) | 1995-03-03 | 1995-03-03 | Method and apparatus for reducing residual far-end echo in voice communication networks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PE46097A1 true PE46097A1 (en) | 1997-12-03 |
Family
ID=23574727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PE1996000143A PE46097A1 (en) | 1995-03-03 | 1996-03-01 | METHOD AND APPARATUS TO REDUCE THE RESIDUAL ECO FROM THE DISTANT END, IN VOICE COMMUNICATION NETWORKS |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR970703071A (en) |
| IL (1) | IL117329A (en) |
| PE (1) | PE46097A1 (en) |
| TW (1) | TW281833B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI703561B (en) * | 2018-09-25 | 2020-09-01 | 塞席爾商元鼎音訊股份有限公司 | Sound cancellation method and electronic device performing the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1208769B (en) * | 1983-10-12 | 1989-07-10 | Cselt Centro Studi Lab Telecom | THERISTICS VARIATIONS OVER TIME PROCEDURE AND DEVICE FOR THE NUMERICAL CANCELLATION OF THE ECO GENERATED IN CONNECTIONS WITH CARAT |
| JPS61161034A (en) * | 1985-01-09 | 1986-07-21 | Matsushita Electric Ind Co Ltd | Echo cancelling device |
| JPS62116025A (en) * | 1985-11-15 | 1987-05-27 | Nippon Telegr & Teleph Corp <Ntt> | Echo canceler |
| JPH03127518A (en) * | 1989-10-13 | 1991-05-30 | Matsushita Electric Ind Co Ltd | Echo canceller |
| US4947425A (en) * | 1989-10-27 | 1990-08-07 | At&T Bell Laboratories | Echo measurement arrangement |
| JP2508574B2 (en) * | 1992-11-10 | 1996-06-19 | 日本電気株式会社 | Multi-channel eco-removal device |
-
1996
- 1996-01-25 TW TW085100897A patent/TW281833B/en active
- 1996-03-01 IL IL11732996A patent/IL117329A/en not_active IP Right Cessation
- 1996-03-01 PE PE1996000143A patent/PE46097A1/en not_active Application Discontinuation
- 1996-11-04 KR KR1019960706305A patent/KR970703071A/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| IL117329A (en) | 1999-08-17 |
| TW281833B (en) | 1996-07-21 |
| MX9605354A (en) | 1998-05-31 |
| KR970703071A (en) | 1997-06-10 |
| IL117329A0 (en) | 1996-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Grant, registration | ||
| FD | Application declared void or lapsed |