System and method for reconstructing high frequency...

Details System and method for reconstructing high frequency... System and method for reconstructing high frequency...

2011-03-29

2011-03-29

Faulk, Devona E (Department: 2614)

Electrical audio signal processing systems and devices

Sound effects

C381S098000, C700S094000, C084S622000, C084S624000, C084S694000

Reexamination Certificate

active

07916876

ABSTRACT:
A system and method is disclosed for reconstructing high frequency components of a digital audio signal using a harmonic enhancer in a baseband integrated circuit of a receiver handset. The original spectrum of the digital audio signal is upsampled in a times two (2) upsample unit to double the size of the bandwidth. A low pass filter then removes a high frequency alias of the original spectrum. The spectrum is then modulated with a first carrier frequency and sent to a first filter bank where a low pass filter and a high pass filter shape the modulated harmonic spectrum. After gain adjustment, the modulated harmonic spectrum is added to a delayed version of the original spectrum. Additional harmonic spectra are similarly created at other carrier frequencies and added to the audio output spectra to reconstruct high frequency components of the audio signal.

REFERENCES:
patent: 6335973 (2002-01-01), Case
patent: 6792119 (2004-09-01), Aarts
patent: 6829360 (2004-12-01), Iwata et al.
patent: 6865430 (2005-03-01), Runton et al.
patent: 7236839 (2007-06-01), Fujita et al.
patent: 7577269 (2009-08-01), Adelman
patent: 2001/0036285 (2001-11-01), Aarts et al.
patent: 2003/0044023 (2003-03-01), Larsen
patent: 2003/0158729 (2003-08-01), Royle et al.
patent: 2004/0028244 (2004-02-01), Tsushima et al.

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