Electrical audio signal processing systems and devices – Hearing aids – electrical – Frequency transposition
Reexamination Certificate
2007-07-24
2007-07-24
Kuntz, Curtis (Department: 2614)
Electrical audio signal processing systems and devices
Hearing aids, electrical
Frequency transposition
C381S317000, C381S320000
Reexamination Certificate
active
10794912
ABSTRACT:
A method for frequency transposition in a communication device Or a hearing device, respectively, is disclosed by transforming an acoustical signal into an electrical signal (s) and by transforming the electrical signal from time domain into frequency domain to obtain a spectrum (S). A frequency transposition is being applied to the spectrum (S) in order to obtain a transposed spectrum (S′), whereby the frequency transposition is being defined by a nonlinear frequency transposition function. Thereby, it is possible to transpose lower frequencies almost linearly, while higher frequencies are transposed more strongly. As a result thereof, harmonic relationships are not distorted in the lower frequency range, and at the same time, higher frequencies can be moved to a lower frequency range, namely to an audible frequency range of the hearing impaired person. The transposition scheme can be applied to the complete signal spectrum without the need for switching between non-transposition and transposition processing for different parts of the signal. Therefore, no artifacts due to switching are encountered. A higher transmission quality is obtained because more information is taken into account for the transmission.
REFERENCES:
patent: 4982434 (1991-01-01), Lenhardt
patent: 5394475 (1995-02-01), Ribic
patent: 6577739 (2003-06-01), Hurtig et al.
patent: 0 054 450 (1982-06-01), None
patent: 99/14986 (1999-03-01), None
patent: 00/75920 (2000-12-01), None
Xuedong Huang, Alex Acero, Hsiao-Wuen Hon: “Spoken Language Processing” 2001, Prentice Hall Ptr, Upper Saddle River, New Jersey XP002248543, ISBN: 0-13-022616-5, p. 29, line 1—p. 36, line 8.
Allegro Silvia
Dijkstra Evert
Hersbach Adam
McDermott Hugh
Timms Olegs
Kuntz Curtis
Nguyen Tuan Duc
Pearne & Gordon LLP
Phonak AG
LandOfFree
Method for frequency transposition and use of the method in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for frequency transposition and use of the method in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for frequency transposition and use of the method in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3729165