Coded data generation or conversion – Digital code to digital code converters
Reexamination Certificate
2005-04-12
2005-04-12
Tokar, Michael (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
C708S290000
Reexamination Certificate
active
06879265
ABSTRACT:
A frequency interpolating device for restoring an audio signal compressed at high ratio while keeping the high sound quality. An input digital signal to be subjected to frequency interpolation is converted to a spectrum signal representing the spectrum of the time-series signal by an analyzer. A spectrum analyzing section specifies, as an interpolating band, a deletion band not containing any spectrum among the bands defined by dividing the spectrum of the signal. A frequency interpolating section deduces the envelope of a digital signal and scales the spectrum of the spectrum distribution in the interpolating band specified by the spectrum analyzing section so that the spectrum matches with the function of the envelope and performs addition. The past spectra used for the scaling and addition are read out of a spectrum storage section. A synthesizer converts back the signal having the spectrum after the addition to the time-series signal. Thus, an audio signal compressed at high ratio by thinning of frequency components can be restored while keeping the high quality.
REFERENCES:
patent: 5576978 (1996-11-01), Kitayoshi
patent: 5852470 (1998-12-01), Kondo et al.
patent: 6456657 (2002-09-01), Yeap et al.
patent: 06-222799 (1994-08-01), None
patent: 02-235424 (1990-09-01), None
patent: 03-254223 (1991-11-01), None
patent: 06-085607 (1994-03-01), None
patent: 06-294830 (1994-10-01), None
patent: 09-090992 (1997-04-01), None
patent: 09-258787 (1997-10-01), None
patent: 10-097287 (1998-04-01), None
patent: 2000-36755 (2000-02-01), None
patent: 2001-83995 (2001-03-01), None
International Search Report dated Jun. 27, 2001.
Kabushiki Kaisha Kenwood
Nguyen John B
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Tokar Michael
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