ES2064733T3 - Circuito de tratamiento de señal audio. - Google Patents
Circuito de tratamiento de señal audio.Info
- Publication number
- ES2064733T3 ES2064733T3 ES90907341T ES90907341T ES2064733T3 ES 2064733 T3 ES2064733 T3 ES 2064733T3 ES 90907341 T ES90907341 T ES 90907341T ES 90907341 T ES90907341 T ES 90907341T ES 2064733 T3 ES2064733 T3 ES 2064733T3
- Authority
- ES
- Spain
- Prior art keywords
- pct
- signal
- sec
- circuitry
- audio signal
- 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 - Lifetime
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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/15—Correlation function computation including computation of convolution operations
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Data Mining & Analysis (AREA)
- Theoretical Computer Science (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Software Systems (AREA)
- Algebra (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Stereo-Broadcasting Methods (AREA)
- Stereophonic System (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Complex Calculations (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
UN CIRCUITO PROCESADOR PARA TRATAR UNA SEÑAL ENTRANTE CODIFICADA DIGITALMENTE, COMPRENDIENDO EL CIRCUITO MEDIOS (3, 12) PARA MOSTRAR LA SEÑAL CODIFICADA EN DOS O MAS FRECUENCIAS DE MUESTRA, MEDIOS (8, 13, 38, 40, 46) PARA CALCULAR DESDE LOS VALORES MOSTRADOS UNA FUNCION DE CORRELACION CRUZADA, RELEVANTE DE UN MARCO DE TIEMPO PARTICULAR, SIRVIENDO EL VALOR DE DICHA FUNCION PARA CONTROLAR LA OPERACION DE UN ALGORITMO ADAPTABLE, EN EL QUE LAS PARTES DE SEÑAL MOSTRADAS SON TRUNCADAS (2, 5) DE TAL FORMA QUE UNICAMENTE EL BIG DE SIGNO ARITMETICO DE CADA PARTE DE SEÑAL CONTRIBUYE AL CALCULO DE LA FUNCION. EL HARDWARE PARA ESTE CIRCUITO PUEDE CONSTRUIRSE EN LA LINEA DEL ABONADO EN UNA CENTRAL TELEFONICA SOLAMENTE CON UN PEQUEÑO INCREMENTO EN LA ZONA DE CHIP NECESARIA PARA PROPORCIONAR ESA LINEA.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8910956A GB2232860A (en) | 1989-05-12 | 1989-05-12 | Audio signal echo cancellation circuit |
GB9010752A GB2232563B (en) | 1989-05-12 | 1990-05-14 | Audio signal processor circuit |
PCT/GB1990/000747 WO1991018453A1 (en) | 1989-05-12 | 1990-05-15 | Audio signal processor circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2064733T3 true ES2064733T3 (es) | 1995-02-01 |
Family
ID=27264476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES90907341T Expired - Lifetime ES2064733T3 (es) | 1989-05-12 | 1990-05-15 | Circuito de tratamiento de señal audio. |
Country Status (8)
Country | Link |
---|---|
US (1) | US5453976A (es) |
EP (1) | EP0482003B1 (es) |
JP (1) | JPH05501941A (es) |
AT (1) | ATE115794T1 (es) |
CA (1) | CA2063800C (es) |
DE (1) | DE69015193T2 (es) |
ES (1) | ES2064733T3 (es) |
WO (1) | WO1991018453A1 (es) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19543666A1 (de) * | 1995-11-23 | 1997-05-28 | Sel Alcatel Ag | Echokompensator |
US7054346B2 (en) * | 2001-05-07 | 2006-05-30 | Lucent Technologies Inc. | Enhanced frequency hopping in a wireless system |
WO2011098861A1 (en) | 2009-12-21 | 2011-08-18 | Dali Systems Co. Ltd | High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3732410A (en) * | 1969-12-22 | 1973-05-08 | Postmaster Department Res Labo | Self adaptive filter and control circuit therefor |
US3789165A (en) * | 1972-04-24 | 1974-01-29 | Communications Satellite Corp | Echo canceller with variable threshold |
US4024358A (en) * | 1975-10-31 | 1977-05-17 | Communications Satellite Corporation (Comsat) | Adaptive echo canceller using differential pulse code modulation encoding |
US4071903A (en) * | 1976-08-04 | 1978-01-31 | International Business Machines Corporation | Autocorrelation function factor generating method and circuitry therefor |
NL7902053A (nl) * | 1979-03-15 | 1980-09-17 | Philips Nv | Echocompensator voor homochrone data overdrachtssyste- men. |
US4270026A (en) * | 1979-11-28 | 1981-05-26 | International Telephone And Telegraph Corporation | Interpolator apparatus for increasing the word rate of a digital signal of the type employed in digital telephone systems |
DE3235915T1 (de) * | 1981-03-05 | 1983-11-17 | Western Electric Co., Inc., 10038 New York, N.Y. | Energiebanddiskriminator |
US4621172A (en) * | 1982-12-22 | 1986-11-04 | Nec Corporation | Fast convergence method and system for echo canceller |
FR2538975A1 (fr) * | 1982-12-30 | 1984-07-06 | Trt Telecom Radio Electr | Procede utilise dans un dispositif d'annulation d'echo pour la mesure d'un retard d'echo et dispositif de mise en oeuvre de ce procede |
US4562312A (en) * | 1983-02-17 | 1985-12-31 | At&T Bell Laboratories | Subsampling delay estimator for an echo canceler |
US4707824A (en) * | 1983-12-15 | 1987-11-17 | Nec Corporation | Method and apparatus for cancelling echo |
US4760596A (en) * | 1986-02-25 | 1988-07-26 | Gte Laboratories Incorporated | Adaptive echo cancellation and equalization system signal processor and method therefor |
US5062102A (en) * | 1988-12-01 | 1991-10-29 | Nec Corporation | Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients |
-
1990
- 1990-05-15 ES ES90907341T patent/ES2064733T3/es not_active Expired - Lifetime
- 1990-05-15 US US07/793,399 patent/US5453976A/en not_active Expired - Fee Related
- 1990-05-15 JP JP2507405A patent/JPH05501941A/ja active Pending
- 1990-05-15 AT AT90907341T patent/ATE115794T1/de active
- 1990-05-15 DE DE69015193T patent/DE69015193T2/de not_active Expired - Fee Related
- 1990-05-15 CA CA002063800A patent/CA2063800C/en not_active Expired - Fee Related
- 1990-05-15 WO PCT/GB1990/000747 patent/WO1991018453A1/en active IP Right Grant
- 1990-05-15 EP EP90907341A patent/EP0482003B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2063800A1 (en) | 1991-11-16 |
US5453976A (en) | 1995-09-26 |
DE69015193D1 (de) | 1995-01-26 |
WO1991018453A1 (en) | 1991-11-28 |
EP0482003B1 (en) | 1994-12-14 |
JPH05501941A (ja) | 1993-04-08 |
EP0482003A1 (en) | 1992-04-29 |
DE69015193T2 (de) | 1995-05-04 |
CA2063800C (en) | 2001-07-03 |
ATE115794T1 (de) | 1994-12-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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