СПИСОК патентов США - подгруппа МПК16 H04Q1/46


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№ п/п Номер патента Название патента

2016

19479846Low complexity tone/voice discrimination method using a rising edge of a frequency power envelope

2015

29208797Tone detection for signals sent through a vocoder

2005

36868116Universal telephony tones detector

2004

46782095Method and apparatus for performing spectral processing in tone detection
56711540Tone detector with noise detection and dynamic thresholding for robust performance
66694011Method and system for reliably detecting voiceband signaling tones
76687368Tone signal detecting method and tone signal detector
86683944Voice transmitter
96674855High performance multifrequency signal detection

2003

106671252Robust signaling tone duration measurement
116661891Method and apparatus for detecting an activation tone
126603836Interactive voice response apparatus capable of distinguishing between user's incoming voice and outgoing conditioned voice prompts

2002

136438224Tone detection
146381330False tone detect suppression using multiple frame sweeping harmonic analysis

2001

156269160Communications device including an improved CPE alerting signal (CAS) detection system
166229889Robust signaling tone frequency measurement
176195675Tone detection using discrete fourier transform techniques

2000

186147973Signal discrimination apparatus, a method for discriminating a signal, and a signal transmitting apparatus for voiceband signals
196028927Method and device for detecting the presence of a periodic signal of known period

1999

205910906Digital single-frequency tone detection in presence of aliases
215862212Method and structure for detecting a customer premises equipment alerting signal

1998

225809453Methods and apparatus for detecting harmonic structure in a waveform
235765125Detection of tones while minimizing incorrect identification of other sounds as tones
245757513Signal discrimination circuit
255749067Voice activity detector
265729602Programmable multi-tone voice message starting system
275719932Signal-recognition arrangement using cadence tables

1997

285668858Control device for a facsimile apparatus
295666357DTMF tone passer in a voice communication system
305638436Voice detection
315627539Bidirectional signalling mechanism for interfacing computing devices to the analog telephone network
325619565Voice activity detection method and apparatus using the same
335619564Tone detector with improved performance in the presence of speech
345612617Frequency detection circuit

1996

355572588Method and apparatus for detecting reception of a tone signal
365535271Apparatus and method for dual tone multifrequency signal detection
375533118Voice activity detection method and apparatus using the same
385528663DTMF detection for voice processing equipment
395519774Method and system for detecting at a selected station an alerting signal in the presence of speech

1995

405477465Multi-frequency receiver with arbitrary center frequencies
415459785DTMF signal receiving circuit
425459781Selectively activated dual tone multi-frequency detector
435426696Method of improving receiver sensitivity and speech immunity with DTMF-reception
445416836Disconnect signalling detection arrangement
455408529Dual tone detector operable in the presence of speech or background noise and method therefor
465390244Method and apparatus for periodic signal detection

1994

475375166Communication apparatus with cross-talk protection
485363443Differing frequency sine wave generation from a look-up table
495353345Method and apparatus for DTMF detection
505353344Method of determining levels at given frequencies of a VF signal
515349254Call progress detection circuit
525325427Apparatus and robust method for detecting tones
535321745Adaptive efficient single/dual tone decoder apparatus and method for identifying call-progression signals
545319703Apparatus and method for identifying speech and call-progression signals
555295223Voice/voice band data discrimination apparatus

1993

565267305Transparent inband signaling
575251256Independent hysteresis apparatus for tone detection
585218636Dial pulse digit detector
595218635Low-frequency alternating current signal detector, in particular for central office line interface circuits

1992

605172406DTMF signal detection apparatus
615163050Configurable parameter DTMF detector

1991

625070526Signal analyzing system
635007000Classification of audio signals on a telephone line

1990

644979214Method and apparatus for identifying speech in telephone signals

1989

654797931Audio frequency signal identification apparatus

1988

664764966Method and apparatus for voice detection having adaptive sensitivity
674742537Telephone line monitoring system
684742534Telephone receiving equipment for recognizing predetermined combinations of voice-frequency signalling components
694742251Precise call progress detector

1986

704599495Apparatus for multifrequency signalling tone detection

1985

714546490Single frequency detection circuit
724521647Tone detection system and method

1984

734479229Arrangement for and method of detecting multi-frequency sound code signals
744431872Telecommunication receivers

1983

754412299Phase jitter detector
764386239Multifrequency tone detector

1978

774107475Receiver apparatus for detection of two voice frequencies in a multifrequency tone signal
784092499Apparatus for detecting a voice frequency signal
794088838Voice response system
804082924Reference signal circuit in a receiver for detecting two frequencies in a multifrequency tone signal

1977

814027102Voice versus pulsed tone signal discrimination circuit
824004105Multifrequency signal receiver for use in telephone signaling systems or the like

1976

833963878Signal interpreting system for frequency selective multifrequency tone dialing
843944753Apparatus for distinguishing voice and other noise signals from legitimate multi-frequency tone signals present on telephone or similar communication lines
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017