223531 ⎘
Line transmission systems; Details; Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using double talk detection
ECHO SUPPRESSING DEVICE, ECHO SUPPRESSING METHOD, AND ECHO SUPPRESSING PROGRAM
#2Double talk detectors
#3DOUBLE TALK DETECTION USING CAPTURE UP-SAMPLING
#4Echo suppression device, echo suppression method, and echo suppression program
#5Aggregating hardware loopback
#6Echo cancellation to alleviate timing varying channels
#7Echo cancellation to alleviate timing varying channels
#8Estimating averaged noise component in a microphone signal
#9CARRIER FREQUENCY OFFSET ESTIMATION DEVICE AND CARRIER FREQUENCY OFFSET ESTIMATION METHOD
#10Echo canceller device and voice telecommunications device
#11Adaptive filter with manageable resource sharing
#12Full duplex voice communication system and method
#13Echo canceller device and echo cancel method
#14Echo cancellation for a communication device
#15Audio signal processing device, audio signal processing method, and audio signal processing program
#16Signal processing method, signal processing device, and signal processing program
#17Controlling operational characteristics of acoustic echo canceller
#18Variable step size echo cancellation with accounting for instantaneous interference
#19Detection of double talk in telecommunications networks
#20Methods and devices for updating an adaptive filter for echo cancellation
#21Method for processing an audio signal and audio receiving circuit
#22Apparatus with dynamic audio signal pre-conditioning and methods therefor
#23Signal processing method, signal processing device, and signal processing program
#24Detecting double talk in acoustic echo cancellation using zero-crossing rate
#25System and method for acoustic echo cancellation
#26Modem with voice processing capability
#27OFDM modulation signal demodulator, receiving apparatus, and receiving and displaying apparatus
#28Enhanced echo cancellation
#29Detection of double talk in telecommunications networks
#30Integrated echo cancellation and noise suppression
#31Nonlinear reference signal processing for echo suppression
#32ADAPTIVE FILTER AND ECHO CANCELLER HAVING THIS ADAPTIVE FILTER
#33Adaptive gain control based on echo canceller performance information
#34Voice and data exchange over a packet based network
#35Modem with voice processing capability
#36Method and apparatus for acoustic echo cancellation in VoIP terminal
#37Gateway with voice
#38Enhanced echo cancellation
#39System and method for echo cancellation
#40Echo canceller with heavy double-talk estimation
#41Echo path change detection in telecommunications networks
#42Detection of double talk in telecommunications networks
#43Linear full duplex system and method for acoustic echo cancellation
#44Acoustic echo canceler
#45Voice and data exchange over a packet based network with timing recovery
#46Echo canceler
#47METHOD AND APPARATUS FOR ECHO CANCELLATION
#48System and method for providing step size control for subband affine projection filters for echo cancellation applications
#49Voice and data exchange over a packet based network
#50ECHO CANCELLER
#51Voice and data exchange over a packet based network with timing recovery
#52Double-talk detector with accuracy and speed of detection improved and a method therefor
#53Echo Path Change Detection in a Network Echo Canceller
#54Full-duplex communication device and method of acoustic echo cancellation therein
#55Echo canceller with interference-level controlled step size
#56Method and test signal for measuring speech intelligibility
#57Electricity echo cancellation device and method
#58Signal detection using multiple detectors
#59Echo canceler and echo canceling method
#60Signal processing method, signal processing device, and signal processing program
#61Data rate controller
#62Delayed adaptation structure for improved double-talk immunity in echo cancellation devices
#63Method and apparatus for detecting echo path changes in an acoustic echo canceller
#64Echo cancellation for channels with unknown time-varying gain
#65Echo detection and delay estimation using a pattern recognition approach and cepstral correlation
#66Mobile communication apparatus
#67Voice and data exchange over a packet based network with voice detection
#68Adaptive gain control based on echo canceller performance information
#69Double-talk detector for an acoustic echo canceller
#70Echo canceller
#71Voice and data exchange over a packet based network with AGC
#72Echo canceller controller
#73Fast echo canceller reconvergence after TDM slips and echo level changes
#74Echo canceller employing dual-H architecture having improved non-linear echo path detection
#75Voice and data exchange over a packet based network
#76Echo canceller having improved non-linear processor
#77Echo canceling apparatus, telephone set using the same, and echo canceling method
#78Line extender for high speed modem data transfer
#79Method for detecting echo path changes in echo cancellers
#80Apparatus and method for canceling residual echo in a mobile terminal of a mobile communication system
#81Method and apparatus for reducing echo in a communication system
#82Gateway with voice
#83Voice and data exchange over a packet based network with timing recovery
#84Methods for detecting double talk
#85Methods and apparatus for performing echo cancellation for a communication device
#86Echo path change detector with robustness to double talk