MX9600387A - Aparato y metodo para la deteccion de señales de multifrecuencia de doble tono. - Google Patents
Aparato y metodo para la deteccion de señales de multifrecuencia de doble tono.Info
- Publication number
- MX9600387A MX9600387A MX9600387A MX9600387A MX9600387A MX 9600387 A MX9600387 A MX 9600387A MX 9600387 A MX9600387 A MX 9600387A MX 9600387 A MX9600387 A MX 9600387A MX 9600387 A MX9600387 A MX 9600387A
- Authority
- MX
- Mexico
- Prior art keywords
- digit
- dtmf
- state
- detect
- sample groups
- Prior art date
Links
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
-
- 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
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
Abstract
Un método para identificar una presencia de dígitos válidos de multifrecuencia de doble tono candidatos (DTMF) en una señal recibida, el método comprende las etapas de: identificar di la señal recibida se encuentra en un estado de deteccion de dígitos de DTMF, un estado de potencia elevada de no-deteccion, o un estado de baja potencia de no-deteccion; e identificar un candidato a dígito cuando se detecta la presencia de un estado diferente al estado de baja potencia de no-deteccion siguiente a una deteccion de la presencia del estado de baja potencia de no-deteccion para un período de tiempo predeterminado.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/250,783 US5535271A (en) | 1994-05-27 | 1994-05-27 | Apparatus and method for dual tone multifrequency signal detection |
Publications (1)
Publication Number | Publication Date |
---|---|
MX9600387A true MX9600387A (es) | 1998-11-30 |
Family
ID=22949132
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX9600387A MX9600387A (es) | 1994-05-27 | 1996-01-26 | Aparato y metodo para la deteccion de señales de multifrecuencia de doble tono. |
Country Status (6)
Country | Link |
---|---|
US (1) | US5535271A (es) |
EP (1) | EP0711493A1 (es) |
CA (1) | CA2167731A1 (es) |
FI (1) | FI960334A (es) |
MX (1) | MX9600387A (es) |
WO (1) | WO1995033345A1 (es) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR0149759B1 (ko) * | 1995-11-20 | 1998-11-02 | 김광호 | 디지탈신호 처리칩을 이용한 디티엠프 검출기 및 구현방법 |
US6574321B1 (en) | 1997-05-08 | 2003-06-03 | Sentry Telecom Systems Inc. | Apparatus and method for management of policies on the usage of telecommunications services |
US5949864A (en) * | 1997-05-08 | 1999-09-07 | Cox; Neil B. | Fraud prevention apparatus and method for performing policing functions for telephone services |
US7423983B1 (en) | 1999-09-20 | 2008-09-09 | Broadcom Corporation | Voice and data exchange over a packet based network |
US6549587B1 (en) | 1999-09-20 | 2003-04-15 | Broadcom Corporation | Voice and data exchange over a packet based network with timing recovery |
US6882711B1 (en) | 1999-09-20 | 2005-04-19 | Broadcom Corporation | Packet based network exchange with rate synchronization |
US6765931B1 (en) * | 1999-04-13 | 2004-07-20 | Broadcom Corporation | Gateway with voice |
US7924752B2 (en) | 1999-09-20 | 2011-04-12 | Broadcom Corporation | Voice and data exchange over a packet based network with AGC |
US7161931B1 (en) | 1999-09-20 | 2007-01-09 | Broadcom Corporation | Voice and data exchange over a packet based network |
US6757367B1 (en) | 1999-09-20 | 2004-06-29 | Broadcom Corporation | Packet based network exchange with rate synchronization |
US6560331B1 (en) | 1999-09-28 | 2003-05-06 | 3Com Corporation | System and method for precise DTMF signal detection |
US7920697B2 (en) * | 1999-12-09 | 2011-04-05 | Broadcom Corp. | Interaction between echo canceller and packet voice processing |
DE60038251T2 (de) * | 1999-12-13 | 2009-03-12 | Broadcom Corp., Irvine | Sprach-durchgangsvorrichtung mit sprachsynchronisierung in abwärtsrichtung |
US7127229B2 (en) * | 2001-09-04 | 2006-10-24 | Uniden Corporation | Emergency report cellular phone, cellular connection switching method and GPS positioning method |
US6931076B2 (en) * | 2002-12-31 | 2005-08-16 | Intel Corporation | Signal detector |
AT500831B1 (de) * | 2004-09-27 | 2008-05-15 | Durst Phototech Digital Tech | Vorrichtung zum erzeugen eines mehrfarbigen, digitalen bildes |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6113793A (ja) * | 1984-06-28 | 1986-01-22 | Nec Corp | プツシユボタン信号受信器 |
US4689760A (en) * | 1984-11-09 | 1987-08-25 | Digital Sound Corporation | Digital tone decoder and method of decoding tones using linear prediction coding |
US4696031A (en) * | 1985-12-31 | 1987-09-22 | Wang Laboratories, Inc. | Signal detection and discrimination using waveform peak factor |
US5267305A (en) * | 1987-10-05 | 1993-11-30 | Ambassador College | Transparent inband signaling |
US4908825A (en) * | 1988-04-08 | 1990-03-13 | Northern Telecom Limited | Memory organization and output sequencer for a signal processor |
US4853958A (en) * | 1988-06-02 | 1989-08-01 | Northern Telecom Limited | LPC-based DTMF receiver for secondary signalling |
US4979214A (en) * | 1989-05-15 | 1990-12-18 | Dialogic Corporation | Method and apparatus for identifying speech in telephone signals |
US5073971A (en) * | 1989-09-05 | 1991-12-17 | Motorola, Inc. | Cellular radiotelephone communications system |
US5257309A (en) * | 1990-12-11 | 1993-10-26 | Octel Communications Corporation | Dual tone multifrequency signal detection and identification methods and apparatus |
US5163050A (en) * | 1991-01-23 | 1992-11-10 | Digital Sound Corporation | Configurable parameter dtmf detector |
US5251256A (en) * | 1991-07-15 | 1993-10-05 | Rolm Company | Independent hysteresis apparatus for tone detection |
US5392348A (en) * | 1991-11-25 | 1995-02-21 | Motorola, Inc. | DTMF detection having sample rate decimation and adaptive tone detection |
US5325427A (en) * | 1992-03-23 | 1994-06-28 | At&T Bell Laboratories | Apparatus and robust method for detecting tones |
US5311589A (en) * | 1992-03-31 | 1994-05-10 | At&T Bell Laboratories | Apparatus and method for audible signaling tone recognition |
EP0566928A3 (en) * | 1992-04-24 | 1994-08-10 | Alcatel Australia | Tone detection method for telephone subset |
US5321745A (en) * | 1992-05-26 | 1994-06-14 | Vmx, Inc. | Adaptive efficient single/dual tone decoder apparatus and method for identifying call-progression signals |
EP0579927A2 (en) * | 1992-06-24 | 1994-01-26 | Siemens Rolm Communications Inc. (a Delaware corp.) | DTMF signal detection for voice processing equipment |
SE9202065L (sv) * | 1992-07-03 | 1994-01-04 | Ericsson Telefon Ab L M | Sätt att förbättra mottagarens känslighet och talimmuniteten vid DTMF-mottagning |
US5353346A (en) * | 1992-12-22 | 1994-10-04 | Mpr Teltech, Limited | Multi-frequency signal detector and classifier |
-
1994
- 1994-05-27 US US08/250,783 patent/US5535271A/en not_active Expired - Lifetime
-
1995
- 1995-05-26 WO PCT/US1995/006752 patent/WO1995033345A1/en not_active Application Discontinuation
- 1995-05-26 CA CA002167731A patent/CA2167731A1/en not_active Abandoned
- 1995-05-26 EP EP95921465A patent/EP0711493A1/en not_active Withdrawn
-
1996
- 1996-01-24 FI FI960334A patent/FI960334A/fi unknown
- 1996-01-26 MX MX9600387A patent/MX9600387A/es unknown
Also Published As
Publication number | Publication date |
---|---|
EP0711493A1 (en) | 1996-05-15 |
WO1995033345A1 (en) | 1995-12-07 |
CA2167731A1 (en) | 1995-12-07 |
US5535271A (en) | 1996-07-09 |
FI960334A0 (fi) | 1996-01-24 |
FI960334A (fi) | 1996-03-26 |
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