Telephonic communications – Substation or terminal circuitry – Conversion of signal form
Reexamination Certificate
2007-10-30
2007-10-30
Singh, Ramnandan (Department: 2614)
Telephonic communications
Substation or terminal circuitry
Conversion of signal form
C381S094300
Reexamination Certificate
active
09850040
ABSTRACT:
Techniques for enhancing the sound quality of computer telephony systems are provided. In general, digital signals including telephony sounds are converted from the time domain to the frequency domain. If noise is detected in the frequency domain conversion of the digital signals, the noise is removed utilizing a filter. The noise detection and filtering can be performed in software so that enhanced audio quality can be achieved at a relatively low cost and with flexibility for very diverse environments.
REFERENCES:
patent: 4185168 (1980-01-01), Graupe et al.
patent: 4255620 (1981-03-01), Harris et al.
patent: 4642583 (1987-02-01), Fucito et al.
patent: 4820059 (1989-04-01), Miller et al.
patent: 4847897 (1989-07-01), Means
patent: 4985925 (1991-01-01), Langberg et al.
patent: 5091954 (1992-02-01), Sasaki et al.
patent: 5265042 (1993-11-01), Smith, Jr.
patent: 5343523 (1994-08-01), Bartlett et al.
patent: 5577161 (1996-11-01), Pelaez Ferrigno
patent: 5664052 (1997-09-01), Nishiguchi et al.
patent: 5677987 (1997-10-01), Seki et al.
patent: 5751822 (1998-05-01), Yamaguchi et al.
patent: 5752225 (1998-05-01), Fielder
patent: 5774565 (1998-06-01), Benning et al.
patent: 5933495 (1999-08-01), Oh
patent: 6205421 (2001-03-01), Morii
patent: 6289309 (2001-09-01), deVries
patent: 6321194 (2001-11-01), Berestesky
patent: 6445801 (2002-09-01), Pastor et al.
patent: 6480823 (2002-11-01), Zhao et al.
patent: 6658107 (2003-12-01), Sorqvist et al.
patent: 6711540 (2004-03-01), Bartkowiak
patent: 2002/0118851 (2002-08-01), Paludan-Mueller
patent: WO 00/38180 (2000-06-01), None
patent: WO 00/62501 (2000-10-01), None
Carter George E.
Skubnik Bianka
Siemens Communications Inc.
Singh Ramnandan
LandOfFree
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