Data processing: financial – business practice – management – or co – For cost/price – Postage meter system
Reexamination Certificate
2006-07-11
2006-07-11
Ngo, Chuong D. (Department: 2193)
Data processing: financial, business practice, management, or co
For cost/price
Postage meter system
Reexamination Certificate
active
07076471
ABSTRACT:
To decrease the number of arithmetical operations in a filtering process for decoding a digital signal and reduce a cost required for decoding. A filtering method for use in decoding a digital signal from a frequency domain to a time domain includes: a first step of multiplying an input data stream and a transformation matrix that is decomposed into a sparse matrix from an inverse MDCT transformation matrix for making the inverse MDCT transformation of the input data stream composed of a plurality of data blocks, and has a smaller size than the inverse MDCT transformation matrix, to acquire an output data stream composed of a plurality of data blocks; a second step of storing predetermined data contained in each data block of the output data stream; and a third step of generating the digital signal in the time domain on the basis of each data block acquired at the first step and the predetermined data stored at the second step in processing the former stage data block.
REFERENCES:
patent: 6119080 (2000-09-01), Liu et al.
patent: 6125212 (2000-09-01), Kresch et al.
patent: 6856262 (2005-02-01), Mayer et al.
patent: 2002/0106020 (2002-08-01), Cheng et al.
patent: A-07-210196 (1995-08-01), None
patent: 08-279758 (1996-10-01), None
patent: A-2000-286713 (2000-10-01), None
patent: A-2000-323993 (2000-11-01), None
patent: A-2001-356799 (2001-12-01), None
Konstantinos Konstantinides, “Fast Subband Filtering in MPEG Audio Coding,” IEEE Signal Processing Letters, vol. 1, No. 2, pp. 26-28, Feb. 1994.
Scott B. Marovich, “Faster MPEG-1 Layer III Audio Decoding,” Computer Systems and Technology Laboratory, Hewlett Packard, pp. 1-10, Jun. 2000.
Krister Lagerström, “Design and Implementation of an MPEG-1 Layer III Audio Decoder,” Design and Implementation of an MP3 Decoder, pp. 1-44, May 2001.
Baisho Fumihito
Todoroki Akinari
Ngo Chuong D.
Oliff & Berridg,e PLC
Seiko Epson Corporation
LandOfFree
Filtering method 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 Filtering method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filtering method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3603183