Preprocessing of digital audio data for improving perceptual...

Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C704S500000

Reexamination Certificate

active

07430506

ABSTRACT:
Since music signals are encoded by a voice encoding method optimized to human voice signals such as EVRC (Enhanced Variable Rate Coding) in a cellular communication system, the music signals are often distorted by such encoding method, and listeners experience pauses in music caused by such voice-optimized encoding method. To improve the perceptual sound quality of music, a method for preprocessing digital audio data is provided in order to prevent the problem of pause in music signals in a cellular phone. In particular, AGC (Automatic Gain Control) preprocessing and PHE (Pitch Harmonics Enhancement) is performed to the digital audio data having low dynamic range. By this method, the number of pauses in music signal is reduced, and the perceptual sound quality of the music is improved.

REFERENCES:
patent: 4856068 (1989-08-01), Quatieri et al.
patent: 6397177 (2002-05-01), Isabelle
patent: 6694293 (2004-02-01), Benyassine et al.
patent: 2002/0184005 (2002-12-01), Gigi
patent: 2002-0068585 (2002-08-01), None
patent: 96/05592 (1996-02-01), None
patent: 00/11654 (2000-03-01), None
patent: WO 01/03125 (2001-01-01), None
patent: WO 02/099787 (2002-12-01), None
Tuncer, ‘Single Injection Wtih Perceptual Criteria’, Elektrik, vol. 6, No. 2, 1998, pp. 89-106, http://journals.tubitak.gov.tr/elektrik/issues/elk-98-6-2/elk-6-2-3-97038.pdf.
Ramalho, M.A.; Mammone R.J. “New speech enhancement techniques using the pitch mode modulation model” In: IEEE Circuits and Systems, 1993 Proceedings of the 36thMidwest Symposium on, Aug. 16-18, 1993, pp. 1531-1534 vol. 2.
Pollastri, E. “A pitch tracking system dedicated to process singing voice for musical retrival” In: IEEE Multimedia and Expo, 2002. ICME'02.Proceedings.2002 IEEE pp. 341-344 vol. 1.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Preprocessing of digital audio data for improving perceptual... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Preprocessing of digital audio data for improving perceptual..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preprocessing of digital audio data for improving perceptual... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3971443

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.