Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2004-12-27
2008-03-04
Do, Chat C. (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reexamination Certificate
active
07340497
ABSTRACT:
A signal processing device and method for performing a code string transform by transforming a time series signal with a frequency band from 0 to 20 kHz from a coding system into another, wherein the arithmetic operations of MDCT and IMDCT with a limited frequency band from 0 to 15 kHz are carried out at high speed by performing computations using an FFT operation with a short tap length in the IMDCT processing operation. This allows a reduced work area and a higher speed for arithmetic operations by reducing the number of multiplications and additions when performing MDCT operations, IMDCT operation and/or transforming code strings between different coding system.
REFERENCES:
patent: 4447886 (1984-05-01), Meeker
patent: 5005189 (1991-04-01), Hackett
patent: 5218561 (1993-06-01), Iwadare
patent: 5349549 (1994-09-01), Tsutsui
patent: 5454011 (1995-09-01), Shimoyoshi
patent: 5640421 (1997-06-01), Sonohara et al.
patent: 5646960 (1997-07-01), Sonohara et al.
patent: 5831883 (1998-11-01), Suter et al.
patent: 5890106 (1999-03-01), Bosi-Goldberg
patent: 6266687 (2001-07-01), Leyonhjelm et al.
patent: 6611855 (2003-08-01), Hellberg et al.
patent: 6794996 (2004-09-01), Tsutsui et al.
patent: 05-183442 (1993-07-01), None
Deepen et al., Audio Compression at Low Bit Rates using a Signal Adaptive Switched Filterbank, 1996, IEEE, pp. 1053-1056.
T. Mochizuki, et al.,The Restricting Conditions for Filters for the MDCT Using a Mixture of a Plurality of Block Sizes, Bulletin of Science and Technology for Telecommunications CAS90-10 DSP90-14, pp. 55-60.
F. Hazu, et al.,The adaptive Transform Coding With Adaptive Block Lengths Using the MDCT(ATC-ABS), The Papers for the Speeches in the 1999 Spring National Conference of the Society of Electronic Information and Telecommunications, A-197.
A. W. Johnson, et al., “Frequency Scalable Video Coding Using the MDCT”, Apr. 1994, IEEE, vol. V, pp. 477-480.
Honma Hiroyuki
Kikuchi Atsushi
Tsutsui Kyoya
Do Chat C.
Sonnenschein Nath & Rosenthal LLP
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