СПИСОК патентов США - подгруппа МПК16 H04M3/40


Выделить слова в названиях патентов:


№ п/п Номер патента Название патента

2015

19160843Speech signal processing to improve naturalness

2006

27127240Method for selective mid-call call forwarding from mobile station
36987851Method and apparatus for a high efficiency line driver

2004

46807262Central office control of receive and transmit handset volume
56792098Inter-network line level adjustment method and system

2003

66594359Circuit for eliminating echo and side tones in a switching system
76584176Loop loss measurement and reporting mechanism for digital data services telephone channel equipment

2002

86453153Employing customer premises equipment in communications network maintenance
96453043Flash-cut of speech processing features in a telephone call
106438131Low-overhead service specific convergence layer for voice and telephony over packet-based systems
116404872Method and apparatus for altering a speech signal during a telephone call
126381249Tandem pass through in a switched call

2001

136256377Loop loss measurement and reporting mechanism for digital data services telephone channel equipment
146243454Network-based caller speech muting
156178237Teleconferencing audio bridge

2000

166128369Employing customer premises equipment in communications network maintenance
176078507Patch panel with incorporated distribution amplifiers
186052441Voice response service apparatus
196044147Telecommunications system
206021194Flash-cut of speech processing features in a telephone call

1999

216006189Method and apparatus for storing and forwarding voice signals
225991645Wireless telephone headset system with automatic log on/log off detection
235949854Voice response service apparatus
245943413Method for selectively routing enhanced calls
255926543Headset amplifier with automatic log on/log off detection
265898675Volume control arrangement for compressed information signals
275864615Audio communications inferface, method and communications system for connecting a remote agent to a telephone switch
285859908Method and apparatus for applying multiple speech processing features to a telephone call

1998

295802164Systems and methods for controlling telephone sound enhancement on a per call basis
305781883Method for real-time reduction of voice telecommunications noise not measurable at its source
315768308System for TDMA mobile-to-mobile VSELP codec bypass
325737389Technique for determining a compression ratio for use in processing audio signals within a telecommunications system
335727031Adaptive gain controller
345724416Normalization of calling party sound levels on a conference bridge
355712954System and method for monitoring audio power level of agent speech in a telephonic switch
365708754Method for real-time reduction of voice telecommunications noise not measurable at its source
375706394Telecommunications speech signal improvement by reduction of residual noise

1997

385652712Method and apparatus for calibration of digital test equipment
395642428Method and apparatus for determining playback volume in a messaging system
405642415Modular attenuator
415640433Conversion of synchronous/asynchronous signals
425627827Automatic service cutover for ISDN private exchange
435625687Arrangement for enhancing the processing of speech signals in digital speech interpolation equipment
445621731Private exchange for ISDN
455592545Voice enhancement system and method

1996

465539806Method for customer selection of telephone sound enhancement
475524148Background noise compensation in a telephone network
485521919Method and apparatus for providing switch-based features
495495529Digital sound level control apparatus
505488657Apparatus for and method of operating an automatic log on/log off circuit in a telephone system by disconnecting a headset
515487102Voice interface board for use in an operator system
525485515Background noise compensation in a telephone network

1995

535473666Method and apparatus for digitally controlling gain in a talking path
545471527Voice enhancement system and method
555467395Telephone exchange apparatus
565422950Remote terminal channel unit for telephone transmission lines
575396553Automatic loss control circuit

1994

585377231Automatic gain control circuit for a digital baseband line equalizer
595363441Technique for reducing echoes in conference communications
605357569Trans-hybrid loss compensator for on hook transmission
615347544Gain or loss compensation circuit for telephone lines
625333195Telephone network speech signal enhancement
635280525Adaptive frequency dependent compensation for telecommunications channels

1993

645226077Headset amplifier with automatic log on/log off detection
655212722Hands-free telephone having a handset volume attenuator for controlling speaker volume in a hands-free adaptor
665206902Network signaling arrangement for controlling tandem network functions
675195132Telephone network speech signal enhancement

1992

685119365Bi-directional buffer line amplifier

1991

695070524Telephone system

1990

704980908Voice-switched gain control for voice communication equipment connected to telephone lines

1989

714847885System for measuring and automatically compensating for the distorsions of a connection between a telephone apparatus and a central voice processing unit
724831651Intermediate amplifier for use in two-wire connections of a dial telephone network and method for the gain control of said amplifier

1988

734758822Bidirectional amplifier

1987

744679228Speakerphone sensing circuit

1986

754600816Attenuator adapted for clip mounting to connecting block terminals

1982

764320257Compensation of transmission losses in a telephone system

1981

774281219Telephone line circuit
784278843Two-way amplifier arrangement
794277655Automatic gain repeater

1980

804215251Switching apparatus selectively utilizing a regenerative repeater

1978

814085290Telephone conference amplifier

1977

824045615Monobus interface circuit using opto-coupled hybrids
834013956Telecommunication system with automatically switched modems
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017