Synthesis subband filter process and apparatus

Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C704S269000, C708S402000, C375S240200

Reexamination Certificate

active

07580843

ABSTRACT:
A synthesis subband filter apparatus is provided. The apparatus is used for processing 18 sets of signals which each includes 32 subband sampling signals in accordance with a specification providing 512 window coefficients. The apparatus includes a processor for processing the 18 sets of signals in sequence. The processor further includes a converting module and a generating module. The converting module is used for converting the 32 subband sampling signals of the set of signals being processed into 32 converted vectors by use of 32-points discrete cosine transform (DCT), and writing the 32 converted vectors into 512 default vectors with a first-in, first-out queue. The generating module is used for generating 32 pulse code modulation (PCM) signals, relative to the set of signals being processed according to a set of synthesis formulae proposed in this invention.

REFERENCES:
patent: 5508949 (1996-04-01), Konstantinides
patent: 5809474 (1998-09-01), Park
patent: 6094637 (2000-07-01), Hong
patent: 6108633 (2000-08-01), Kolluru
patent: 6199039 (2001-03-01), Chen et al.
patent: 6344808 (2002-02-01), Taruki et al.
patent: 7076471 (2006-07-01), Todoroki et al.
patent: 7509294 (2009-03-01), Kim
patent: 2002/0173967 (2002-11-01), Law et al.
Sakamoto, T. et al. “A fast MPEG-audio layer III algorithm for a 32-bit MCU” IEEE transactions on Consumer Electronics, vol. 45. No. 3, Nov. 1999.
Paik W. et al. “Design of a novel synthesis filter for real-time MPEG-2 audio decoder implementation of a DSP chip”, IEEE Transactions on Consumer Electronics, vol. 45, No. 4, Nov. 1999.
Konstantinides, K. “Fast subband filtering in MPEG audio coding,” IEEE Signal Processing Letters, vol. 1, No. 2, Feb. 1994.
Galabov, M. “Implementation of IMDCT block of an MP3 decoder through optimization of the DCT matrix,” Radioengineering, vol. 13, No. 4, Dec. 2004.

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

Synthesis subband filter process and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synthesis subband filter process and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesis subband filter process and apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4095454

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