ES2132151T3 - Un metodo de mejorar la sensibilidad e inmunidad de conversacion de un receptor multifrecuencia. - Google Patents
Un metodo de mejorar la sensibilidad e inmunidad de conversacion de un receptor multifrecuencia.Info
- Publication number
- ES2132151T3 ES2132151T3 ES93109992T ES93109992T ES2132151T3 ES 2132151 T3 ES2132151 T3 ES 2132151T3 ES 93109992 T ES93109992 T ES 93109992T ES 93109992 T ES93109992 T ES 93109992T ES 2132151 T3 ES2132151 T3 ES 2132151T3
- Authority
- ES
- Spain
- Prior art keywords
- value
- difference
- normal
- intervals
- determined
- 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
- 230000036039 immunity Effects 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 230000035945 sensitivity Effects 0.000 title abstract 2
- 238000005259 measurement Methods 0.000 abstract 5
- 230000007123 defense Effects 0.000 abstract 1
- 230000001755 vocal effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Noise Elimination (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Telephone Function (AREA)
- Transceivers (AREA)
- Stereo-Broadcasting Methods (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
ESTA INVENCION SE REFIERE A UN METODO PARA MEJORAR LA SENSIBILIDAD Y LA INMUNIDAD DE LAS FRECUENCIAS VOCALES DE UN RECEPTOR UNTO CON UNA RECEPCION DTMF. SEGUN UN PRIMER ASPECTO DE LA INVENCION, SE CUENTA EL NUMERO DE PASOS POR CERO DE LA SEÑAL DE ENTRADA DURANTE UNO DE UNA SERIE DE INTERVALOS DE MEDICION EN TIEMPO REAL A FRECUENCIAS QUE OCURREN EN EL GRUPO DE BAJA FRECUENCIA Y EL GRUPO DE ALTA FRECUENCIA DE UNA SEÑAL DTMF. AL FINAL DE CADA UNO DE LOS INTERVALOS DE MEDICION, EL NUMERO DE PASOS POR CERO EN UN INTERVALO DE MEDICION ACTUAL SE COMPARA PARA CADA GRUPO DE FRECUENCIA CON UN NUMERO CORRESPONDIENTE DE PASOS POR CERO EN UNA SERIE DE INTERVALOS DE MEDICION QUE PRECEDEN AL MAS CERCANO Y SE ESTABLECE LA MAGNITUD DE CUALQUIER DIFERENCIA. LA SEÑAL DE ENTRADA SE TRATA COMO UNA SEÑAL DTMF CUANDO LA DIFERENCIA ES COMO MUCHO IGUAL A UN VALOR LIMITE PERMITIDO. SEGUN UN SEGUNDO ASPECTO DE LA INVENCION, SE DETERMINA EN TIEMPO REAL UN PARAMETRO DE ENERGIA REPRESENTATIVO DE LA ENERGIA DEL TONO DE UNA SEÑAL DE ENTRADA EN CADA UNO DE LAS BANDAS DEL GRUPO DE FRECUENCIA DTMF DURANTE CADA UNO DE UNA SERIE DE INTERVALOS DE MEDICION. AL FINAL DE CADA UNO DE LOS INTERVALOS DE MEDICION, SE DETERMINA EL VALOR MEDIO DE LOS PARAMETROS MEDIDOS TOTALES DURANTE LOS INTERVALOS DE MEDICION DESDE EL PRINCIPIO DE UNA SEÑAL ACTUAL. SE DETERMINA LA DEFERENCIA ENTRE CADA UNO DE LOS PARAMETROS DE ENERGIA ACTUAL EN LAS DOS BANDAS Y EL VALOR MEDIO DE LOS PARAMETROS DETERMINADOS Y SE DETERMINAN POR LO MENOS TRES VALORES UMBRALES PARA ESTA DIFERENCIA, A SABER UN VALOR NORMAL POR DEBAJO DEL CUAL SE CONSIDERA QUE EXISTE UNA SEÑAL DTMF, AL MENOS UN VALOR MAYOR DE LO NORMAL Y AL MENOS UN VALOR MENOR DE LO NORMAL. SE LLEVA A CABO UNA COMPROBACION PARA SER SI LA DIFERENCIA EXISTENTE EN CUALQUIERA DE LAS BANDAS SE ENCUENTRA POR ENCIMA DEL VALOR NORMAL, Y EN TAL CASO, SE AVERIGUA SI LA DIFERENCIA EN CUESTION SE ENCUENTRA TAMBIEN O NO POR ENCIMA DEL VALOR MAYOR DE LO NORMAL. SE COMPARA LA DIFERENCIA DE LA OTRA BANDA CON EL VALOR MAS PEQUEÑO DE LO NORMAL PARA ASI ESTABLECER SI LA DIFERENCIA SE ENCUENTRA O NO POR DEBAJO DE ESTE VALOR, EN CUYA CASO SE CONSIDERA QUE EXISTE UNA SEÑAL DTMF. SEGUN UN TERCER ASPECTO, CUANDO SE ENCUENTRA POR PRIMERA VEZ UNA FRECUENCIA DE INTERFERENCIA DURANTE UNO DE UNA SERIE DE INTERVALOS DE MEDICION CUANDO SE DECODIFICA UNA SEÑAL DTMF, SE ANOTA ESTE HECHO Y SI SE VUELVE A ENCONTRAR EL MISMO TONO DE INTERFERENCIA EN UN INTERVALO DE MEDICION POSTERIOR, SE TOLERA EL TONO DE INTERFERENCIA.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9202065A SE9202065L (sv) | 1992-07-03 | 1992-07-03 | Sätt att förbättra mottagarens känslighet och talimmuniteten vid DTMF-mottagning |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2132151T3 true ES2132151T3 (es) | 1999-08-16 |
Family
ID=20386700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES93109992T Expired - Lifetime ES2132151T3 (es) | 1992-07-03 | 1993-06-23 | Un metodo de mejorar la sensibilidad e inmunidad de conversacion de un receptor multifrecuencia. |
Country Status (10)
Country | Link |
---|---|
US (1) | US5426696A (es) |
EP (1) | EP0576980B1 (es) |
JP (1) | JPH07312763A (es) |
AT (1) | ATE180616T1 (es) |
AU (1) | AU674854B2 (es) |
DE (1) | DE69325053T2 (es) |
DK (1) | DK0576980T3 (es) |
ES (1) | ES2132151T3 (es) |
GR (1) | GR3030894T3 (es) |
SE (2) | SE9202065L (es) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5535271A (en) * | 1994-05-27 | 1996-07-09 | Hughes Electronics | Apparatus and method for dual tone multifrequency signal detection |
US5619564A (en) * | 1995-05-31 | 1997-04-08 | Lucent Technologies Inc. | Tone detector with improved performance in the presence of speech |
JP3452430B2 (ja) * | 1995-09-11 | 2003-09-29 | 富士通株式会社 | 情報信号検出装置および情報信号検出方法 |
US5588053A (en) * | 1995-11-29 | 1996-12-24 | Advanced Micro Devices | DTMF detector system and method which performs static and dynamic thresholding |
US5644634A (en) * | 1995-11-29 | 1997-07-01 | Advanced Micro Devices | System and method for dual tone multifrequency detection using variable frame widths |
US5809133A (en) * | 1996-05-24 | 1998-09-15 | Advanced Micro Devices, Inc. | DTMF detector system and method which performs frequency domain energy calculations with improved performance |
US6370244B1 (en) * | 1998-04-03 | 2002-04-09 | Board Of Regents Of The University Of Texas System | Efficient digital ITU-compliant zero-buffering DTMF detection using the non-uniform discrete fourier transform |
US6757276B1 (en) * | 1998-11-24 | 2004-06-29 | 3Com Corporation | Touch tone replacement for internet telephony |
US7003093B2 (en) | 2000-09-08 | 2006-02-21 | Intel Corporation | Tone detection for integrated telecommunications processing |
US20110104214A1 (en) | 2004-04-15 | 2011-05-05 | Purdue Pharma L.P. | Once-a-day oxycodone formulations |
US6940966B2 (en) * | 2002-02-21 | 2005-09-06 | Vtech Telecommunications, Ltd. | Method and apparatus for detection of a telephone CPE alerting signal |
US6757324B2 (en) * | 2002-07-18 | 2004-06-29 | Motorola, Inc. | Method and apparatus for detecting jamming signal |
US20090103688A1 (en) * | 2006-04-26 | 2009-04-23 | Gabriel Cabelli | System and Method For Dial Tones Screening |
JP5322671B2 (ja) * | 2009-01-30 | 2013-10-23 | 古野電気株式会社 | トーン検出装置及びそれを備える無線通信機 |
US8817717B2 (en) * | 2011-05-05 | 2014-08-26 | Qualcomm Incorporated | Concurrent background spectral scanning for bluetooth packets while receiving WLAN packets |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2116635C3 (de) * | 1971-04-05 | 1978-10-05 | Ibm Deutschland Gmbh, 7000 Stuttgart | Verfahren zur digitalen Decodierung frequenzcodierter Signale und Schaltungsanordnung zur Durchführung des Verfahrens |
US3927259A (en) * | 1974-02-13 | 1975-12-16 | Atlantic Res Corp | Signal identification system |
US3990006A (en) * | 1975-01-08 | 1976-11-02 | Bell Telephone Laboratories, Incorporated | Digital tone detector using concatenated detection intervals |
US4045620A (en) * | 1976-05-10 | 1977-08-30 | Conrac Corporation | Digital tone detector |
US4356348A (en) * | 1979-12-07 | 1982-10-26 | Digital Products Corporation | Techniques for detecting a condition of response on a telephone line |
US4395595A (en) * | 1980-04-23 | 1983-07-26 | Nippon Electric Co., Ltd. | Digital pushbutton signalling receiver |
US4386239A (en) * | 1980-06-17 | 1983-05-31 | Bell Telephone Laboratories, Incorporated | Multifrequency tone detector |
CA1177588A (en) * | 1982-02-12 | 1984-11-06 | Ernst A. Munter | Digital circuit and method for the detection of call progress tones in telephone systems |
GB2185170B (en) * | 1983-11-10 | 1988-06-02 | Stc Plc | Testing telephone lines |
US4675898A (en) * | 1984-12-07 | 1987-06-23 | Buscom Systems, Inc. | Single tone telephone receiver |
US4599495A (en) * | 1985-02-28 | 1986-07-08 | Northern Telecom Limited | Apparatus for multifrequency signalling tone detection |
US4742537A (en) * | 1986-06-04 | 1988-05-03 | Electronic Information Systems, Inc. | Telephone line monitoring system |
US4853958A (en) * | 1988-06-02 | 1989-08-01 | Northern Telecom Limited | LPC-based DTMF receiver for secondary signalling |
US4833399A (en) * | 1988-06-13 | 1989-05-23 | Texas Instruments Incorporated | DTMF receiver |
US5070526A (en) * | 1990-08-08 | 1991-12-03 | Active Voice, Inc. | Signal analyzing system |
-
1992
- 1992-07-03 SE SE9202065A patent/SE9202065L/xx not_active Application Discontinuation
-
1993
- 1993-06-23 DK DK93109992T patent/DK0576980T3/da active
- 1993-06-23 AT AT93109992T patent/ATE180616T1/de not_active IP Right Cessation
- 1993-06-23 DE DE69325053T patent/DE69325053T2/de not_active Expired - Fee Related
- 1993-06-23 EP EP93109992A patent/EP0576980B1/en not_active Expired - Lifetime
- 1993-06-23 ES ES93109992T patent/ES2132151T3/es not_active Expired - Lifetime
- 1993-07-01 US US08/084,714 patent/US5426696A/en not_active Expired - Fee Related
- 1993-07-02 JP JP5220467A patent/JPH07312763A/ja active Pending
- 1993-07-02 AU AU41695/93A patent/AU674854B2/en not_active Ceased
- 1993-10-14 SE SE9303390A patent/SE500919C2/sv not_active IP Right Cessation
-
1999
- 1999-07-30 GR GR990401975T patent/GR3030894T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
EP0576980A3 (es) | 1994-03-02 |
ATE180616T1 (de) | 1999-06-15 |
JPH07312763A (ja) | 1995-11-28 |
AU4169593A (en) | 1994-01-06 |
DE69325053D1 (de) | 1999-07-01 |
AU674854B2 (en) | 1997-01-16 |
EP0576980B1 (en) | 1999-05-26 |
SE500919C2 (sv) | 1994-10-03 |
EP0576980A2 (en) | 1994-01-05 |
SE9303390L (sv) | 1994-01-04 |
SE9202065L (sv) | 1994-01-04 |
DE69325053T2 (de) | 1999-10-21 |
GR3030894T3 (en) | 1999-11-30 |
US5426696A (en) | 1995-06-20 |
DK0576980T3 (da) | 1999-11-15 |
SE9303390D0 (sv) | 1993-10-14 |
SE9202065D0 (sv) | 1992-07-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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