Electrical audio signal processing systems and devices – Headphone circuits
Reexamination Certificate
2002-07-02
2008-03-18
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
Headphone circuits
Reexamination Certificate
active
07346175
ABSTRACT:
A headset system is proposed including a headset unit to be worn by a user and having two or more microphones, and a base unit in wireless communication with the headset. Signals received from the microphones are processed using a first adaptive filter to enhance a target signal, and then divided and supplied to a second adaptive filter arranged to reduce interference signals and a third filter arranged to reduce noise. The outputs of the second and third filters are combined, and are be subject to further a processing in the frequency domain. The results are transmitted to a speech recognition engine.
REFERENCES:
patent: 4025721 (1977-05-01), Graupe et al.
patent: 4425481 (1984-01-01), Mansgold et al.
patent: 4589137 (1986-05-01), Miller
patent: 4628529 (1986-12-01), Borth et al.
patent: 4630304 (1986-12-01), Borth et al.
patent: 4630305 (1986-12-01), Borth et al.
patent: 4887299 (1989-12-01), Cummins et al.
patent: 4931977 (1990-06-01), Klemes
patent: 4956867 (1990-09-01), Zurek et al.
patent: 5027410 (1991-06-01), Williamson et al.
patent: 5224170 (1993-06-01), Waite, Jr.
patent: 5251263 (1993-10-01), Andrea et al.
patent: 5402496 (1995-03-01), Soli et al.
patent: 5412735 (1995-05-01), Engebretson et al.
patent: 5471538 (1995-11-01), Sasaki et al.
patent: 5475759 (1995-12-01), Engebretson
patent: 5557682 (1996-09-01), Warner et al.
patent: 5568519 (1996-10-01), Baier et al.
patent: 5627799 (1997-05-01), Hoshuyama
patent: 5680467 (1997-10-01), Hansen
patent: 5687239 (1997-11-01), Inanaga et al.
patent: 5694474 (1997-12-01), Ngo et al.
patent: 5737430 (1998-04-01), Widrow
patent: 5754665 (1998-05-01), Hosoi
patent: 5793875 (1998-08-01), Lehr et al.
patent: 5825898 (1998-10-01), Marash
patent: 5835607 (1998-11-01), Martin et al.
patent: 5835608 (1998-11-01), Warnaka et al.
patent: 5917921 (1999-06-01), Sasaki et al.
patent: 5991418 (1999-11-01), Kuo
patent: 6002776 (1999-12-01), Bhadkamkar et al.
patent: 6049607 (2000-04-01), Marash et al.
patent: 6069963 (2000-05-01), Martin et al.
patent: 6072884 (2000-06-01), Kates
patent: 6091813 (2000-07-01), Harley et al.
patent: 6094150 (2000-07-01), Ohinshi et al.
patent: 6097771 (2000-08-01), Foschini
patent: 6098040 (2000-08-01), Petroni et al.
patent: 6127973 (2000-10-01), Choi et al.
patent: 6999541 (2006-02-01), Hui
patent: WO 00/30264 (1998-11-01), None
patent: 0883325 (1998-12-01), None
patent: 00/30264 (2000-05-01), None
Rabiner et al., “Fundamentals of Speech Recognition,” Prentice Hall, 1993, pp. 77-79 and 183-190.
Y. Ephraim et al., IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-32, No. 6, Dec. 1984, pp. 1118-1121.
K. Buckley et al., IEEE Transactions on Antennas and Propagation, vol. AP-34, No. 3, Mar. 1986, pp. 311-319.
B. Widrow et al., IEEE Transactions on Antennas and Propagation, vol. AP-30, No. 3, May 1982, pp. 469-478.
B. Widrow et al., Proceedings of the IEEE, Dec. 1967, pp. 2143-2159.
An article entitled “An Alternative Approach to Linearly Constrained Adaptive Beamforming,” by L. Griffiths et al., IEEE Transactions on Antennas and Propagation, vol. AP-30, No. 1, Jan. 1982, pp. 27-34.
An article entitled “Speech Enhancement Using Optimal Non-Linear Spectral Amplitude Estimation,” by Y. Ephraim et al., Proc. IEEE International Conference Acoustics Speech and Signal Processing (Boston) 1983, pp. 1118-1121, Applicants note that this document is mentioned on p. 41 of the specification of the present application.
Hui Siew Kok
Lau Yean Ming
Loh Kok Heng
Bitwave Private Limited
Chin Vivian
Greenblum & Bernstein P.L.C.
Lun-see Lao
LandOfFree
System and apparatus for speech communication and speech... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and apparatus for speech communication and speech..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and apparatus for speech communication and speech... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3968238