Telephonic communications – Echo cancellation or suppression
Reexamination Certificate
2007-04-17
2007-04-17
Tieu, Binh K. (Department: 2614)
Telephonic communications
Echo cancellation or suppression
C379S406080, C381S094100, C381S095000
Reexamination Certificate
active
11124772
ABSTRACT:
A communications system and method performs centralized signal processing on received audio signals. A plurality of terminals are coupled to a processing switch via links. The terminals can be, for example, dedicated speakerphones, desktop handsets, or personal computers with audio capabilities. The links can be wired or wireless, can carry analog or digital signals, and can be shared with other users in a network. The switch receives the audio data from the terminals, processes the data according to desired acoustical procedures, creates one or more output mixes, and provides the output mixes to the appropriate terminals. The operation of the processing switch is controlled by a communications support module (CSM) which can receive, process, and send data to/from multiple terminals simultaneously. The CSM receives audio signals from the terminals. The CSM uses stored room models holding room model information including data and/or filters representing the acoustic properties of the terminal and/or the environment surrounding the terminal to produce the audio signals. Signal processing (SP) modules provide a pool of SP power from which the CSM can draw to process audio signals received from or being sent to the terminals. The CSM uses the SP modules to perform signal processing including acoustic echo cancellation, automatic gain control, noise reduction. The CSM also uses a mixing module to perform signal mixing.
REFERENCES:
patent: 4475189 (1984-10-01), Herr et al.
patent: 4482998 (1984-11-01), Marouf et al.
patent: 4550224 (1985-10-01), Winchell
patent: 4558180 (1985-12-01), Scordo
patent: 4720850 (1988-01-01), Oberlander et al.
patent: 4965822 (1990-10-01), Williams
patent: 5379280 (1995-01-01), Cotton et al.
patent: 5734724 (1998-03-01), Kinoshita et al.
patent: 5764759 (1998-06-01), Hamilton et al.
patent: 5883944 (1999-03-01), Burke et al.
patent: 5936662 (1999-08-01), Kim et al.
patent: 5987098 (1999-11-01), Wintour
patent: 6008838 (1999-12-01), Iizawa
patent: 6304645 (2001-10-01), Holland et al.
patent: 6389440 (2002-05-01), Lewis et al.
patent: 6501739 (2002-12-01), Cohen
patent: 6542600 (2003-04-01), Munson et al.
patent: 6553122 (2003-04-01), Shimauchi et al.
patent: 6580793 (2003-06-01), Dunn et al.
patent: 6694373 (2004-02-01), Sastry et al.
patent: 6738358 (2004-05-01), Bist et al.
patent: 2002/0064139 (2002-05-01), Bist et al.
Hsiang Peter
Parry James H.
Tandberg Telecom AS
Tieu Binh K.
LandOfFree
Communications system and method utilizing centralized... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Communications system and method utilizing centralized..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communications system and method utilizing centralized... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3797411