СПИСОК патентов США - подгруппа МПК16 H04Q1/46
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| № п/п | Номер патента | Название патента | |||
2016 | |||||
| 1 | 9479846 | Low complexity tone/voice discrimination method using a rising edge of a frequency power envelope | |||
2015 | |||||
| 2 | 9208797 | Tone detection for signals sent through a vocoder | |||
2005 | |||||
| 3 | 6868116 | Universal telephony tones detector | |||
2004 | |||||
| 4 | 6782095 | Method and apparatus for performing spectral processing in tone detection | |||
| 5 | 6711540 | Tone detector with noise detection and dynamic thresholding for robust performance | |||
| 6 | 6694011 | Method and system for reliably detecting voiceband signaling tones | |||
| 7 | 6687368 | Tone signal detecting method and tone signal detector | |||
| 8 | 6683944 | Voice transmitter | |||
| 9 | 6674855 | High performance multifrequency signal detection | |||
2003 | |||||
| 10 | 6671252 | Robust signaling tone duration measurement | |||
| 11 | 6661891 | Method and apparatus for detecting an activation tone | |||
| 12 | 6603836 | Interactive voice response apparatus capable of distinguishing between user's incoming voice and outgoing conditioned voice prompts | |||
2002 | |||||
| 13 | 6438224 | Tone detection | |||
| 14 | 6381330 | False tone detect suppression using multiple frame sweeping harmonic analysis | |||
2001 | |||||
| 15 | 6269160 | Communications device including an improved CPE alerting signal (CAS) detection system | |||
| 16 | 6229889 | Robust signaling tone frequency measurement | |||
| 17 | 6195675 | Tone detection using discrete fourier transform techniques | |||
2000 | |||||
| 18 | 6147973 | Signal discrimination apparatus, a method for discriminating a signal, and a signal transmitting apparatus for voiceband signals | |||
| 19 | 6028927 | Method and device for detecting the presence of a periodic signal of known period | |||
1999 | |||||
| 20 | 5910906 | Digital single-frequency tone detection in presence of aliases | |||
| 21 | 5862212 | Method and structure for detecting a customer premises equipment alerting signal | |||
1998 | |||||
| 22 | 5809453 | Methods and apparatus for detecting harmonic structure in a waveform | |||
| 23 | 5765125 | Detection of tones while minimizing incorrect identification of other sounds as tones | |||
| 24 | 5757513 | Signal discrimination circuit | |||
| 25 | 5749067 | Voice activity detector | |||
| 26 | 5729602 | Programmable multi-tone voice message starting system | |||
| 27 | 5719932 | Signal-recognition arrangement using cadence tables | |||
1997 | |||||
| 28 | 5668858 | Control device for a facsimile apparatus | |||
| 29 | 5666357 | DTMF tone passer in a voice communication system | |||
| 30 | 5638436 | Voice detection | |||
| 31 | 5627539 | Bidirectional signalling mechanism for interfacing computing devices to the analog telephone network | |||
| 32 | 5619565 | Voice activity detection method and apparatus using the same | |||
| 33 | 5619564 | Tone detector with improved performance in the presence of speech | |||
| 34 | 5612617 | Frequency detection circuit | |||
1996 | |||||
| 35 | 5572588 | Method and apparatus for detecting reception of a tone signal | |||
| 36 | 5535271 | Apparatus and method for dual tone multifrequency signal detection | |||
| 37 | 5533118 | Voice activity detection method and apparatus using the same | |||
| 38 | 5528663 | DTMF detection for voice processing equipment | |||
| 39 | 5519774 | Method and system for detecting at a selected station an alerting signal in the presence of speech | |||
1995 | |||||
| 40 | 5477465 | Multi-frequency receiver with arbitrary center frequencies | |||
| 41 | 5459785 | DTMF signal receiving circuit | |||
| 42 | 5459781 | Selectively activated dual tone multi-frequency detector | |||
| 43 | 5426696 | Method of improving receiver sensitivity and speech immunity with DTMF-reception | |||
| 44 | 5416836 | Disconnect signalling detection arrangement | |||
| 45 | 5408529 | Dual tone detector operable in the presence of speech or background noise and method therefor | |||
| 46 | 5390244 | Method and apparatus for periodic signal detection | |||
1994 | |||||
| 47 | 5375166 | Communication apparatus with cross-talk protection | |||
| 48 | 5363443 | Differing frequency sine wave generation from a look-up table | |||
| 49 | 5353345 | Method and apparatus for DTMF detection | |||
| 50 | 5353344 | Method of determining levels at given frequencies of a VF signal | |||
| 51 | 5349254 | Call progress detection circuit | |||
| 52 | 5325427 | Apparatus and robust method for detecting tones | |||
| 53 | 5321745 | Adaptive efficient single/dual tone decoder apparatus and method for identifying call-progression signals | |||
| 54 | 5319703 | Apparatus and method for identifying speech and call-progression signals | |||
| 55 | 5295223 | Voice/voice band data discrimination apparatus | |||
1993 | |||||
| 56 | 5267305 | Transparent inband signaling | |||
| 57 | 5251256 | Independent hysteresis apparatus for tone detection | |||
| 58 | 5218636 | Dial pulse digit detector | |||
| 59 | 5218635 | Low-frequency alternating current signal detector, in particular for central office line interface circuits | |||
1992 | |||||
| 60 | 5172406 | DTMF signal detection apparatus | |||
| 61 | 5163050 | Configurable parameter DTMF detector | |||
1991 | |||||
| 62 | 5070526 | Signal analyzing system | |||
| 63 | 5007000 | Classification of audio signals on a telephone line | |||
1990 | |||||
| 64 | 4979214 | Method and apparatus for identifying speech in telephone signals | |||
1989 | |||||
| 65 | 4797931 | Audio frequency signal identification apparatus | |||
1988 | |||||
| 66 | 4764966 | Method and apparatus for voice detection having adaptive sensitivity | |||
| 67 | 4742537 | Telephone line monitoring system | |||
| 68 | 4742534 | Telephone receiving equipment for recognizing predetermined combinations of voice-frequency signalling components | |||
| 69 | 4742251 | Precise call progress detector | |||
1986 | |||||
| 70 | 4599495 | Apparatus for multifrequency signalling tone detection | |||
1985 | |||||
| 71 | 4546490 | Single frequency detection circuit | |||
| 72 | 4521647 | Tone detection system and method | |||
1984 | |||||
| 73 | 4479229 | Arrangement for and method of detecting multi-frequency sound code signals | |||
| 74 | 4431872 | Telecommunication receivers | |||
1983 | |||||
| 75 | 4412299 | Phase jitter detector | |||
| 76 | 4386239 | Multifrequency tone detector | |||
1978 | |||||
| 77 | 4107475 | Receiver apparatus for detection of two voice frequencies in a multifrequency tone signal | |||
| 78 | 4092499 | Apparatus for detecting a voice frequency signal | |||
| 79 | 4088838 | Voice response system | |||
| 80 | 4082924 | Reference signal circuit in a receiver for detecting two frequencies in a multifrequency tone signal | |||
1977 | |||||
| 81 | 4027102 | Voice versus pulsed tone signal discrimination circuit | |||
| 82 | 4004105 | Multifrequency signal receiver for use in telephone signaling systems or the like | |||
1976 | |||||
| 83 | 3963878 | Signal interpreting system for frequency selective multifrequency tone dialing | |||
| 84 | 3944753 | Apparatus 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 | |||||