Electrical audio signal processing systems and devices – Dereverberators
Reexamination Certificate
2005-03-29
2009-08-11
Mei, Xu (Department: 2614)
Electrical audio signal processing systems and devices
Dereverberators
C381S098000
Reexamination Certificate
active
07574005
ABSTRACT:
A method is designed for emphasizing a howling frequency component of a sound signal observed in an acoustic feedback system during an observation period having a predetermined length. The method is carried out by the steps of successively sampling the sound signal from the acoustic feedback system to provide a running set of samples of the sound signal during the observation period such that a total number of the samples in the running set increments each time one or more of new sample is added to the running set until the total number of the samples corresponds to the predetermined length of the observation period, recurrently calculating a running frequency characteristic of the sound signal on a common frequency axis for the observation period from the running set of the samples each time one ore more of new sample is added to the running set, and accumulating the recurrently calculated running frequency characteristics on the common frequency axis so as to emphasize a howling frequency component contained in the sound signal.
REFERENCES:
patent: 5661813 (1997-08-01), Shimauchi et al.
patent: 5664011 (1997-09-01), Crochiere et al.
patent: 5761318 (1998-06-01), Shimauchi et al.
patent: 6246760 (2001-06-01), Makino et al.
patent: 6738358 (2004-05-01), Bist et al.
patent: 6950513 (2005-09-01), Hirai et al.
patent: 7130428 (2006-10-01), Hirai et al.
patent: 0 843 502 (1998-05-01), None
patent: 06-164278 (1994-06-01), None
patent: 08-223683 (1996-08-01), None
patent: 3134557 (2000-12-01), None
patent: WO-03/079721 (2003-09-01), None
Fujita Hiroaki
Okumura Hiraku
Takahashi Yoshinori
Tohyama Mikio
Mei Xu
Morrison & Foerster / LLP
Yamaha Corporation
LandOfFree
Howling frequency component emphasis method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Howling frequency component emphasis method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Howling frequency component emphasis method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4087413