Partially complex modulated filter bank

Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed

Reexamination Certificate

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Reexamination Certificate

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07917561

ABSTRACT:
An apparatus for processing a plurality of real-valued subband signals using a first real-valued subband signal and a second real-valued subband signal to provide at least a complex-valued subband signal comprises a multiband filter for providing an intermediate real-valued subband signal and a calculator for providing the complex-valued subband signal by combining a real-valued subband signal from the plurality of real-valued subband signals and the intermediate subband signal.

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patent: 7242710 (2007-07-01), Ekstrand
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patent: WO02/080362 (2002-10-01), None
patent: WO 2004/093495 (2004-10-01), None
Official Communication issued in Taiwanese Patent Application No. 095130732, mailed on Jun. 25, 2009.
Ekstrand, Per, “Bandwidth Extension of Audio Signals”,Proc. 1stIEEE Benelux Workshop on Model Based Processing and Coding of Audio(MPCA-2002), Leuven, Belgium, (Nov. 15, 2002).
J. Herre et al., “The Reference Model Architecture for MPEG Spatial Audio Coding”,Audio Engineering Society Convention Paper 6447, Presented at the 118thConvention, Barcelona, Spain (May 28-31, 2005).
Schuijers, Erik et al., “Low Complexity Parametric Stereo Coding”,Audio Engineering society Convention Paper 6073, Presented at the 116thConvention, Berlin, Germany (May 8-11, 2004).
Shimada, Osamu et al., “A Low Power SBR Algorithm for the MPEG-4 Audio Standard and its DSP Implementation”,Audio Engineering Society Convention Paper 6048, Presented at the 116thConvention, Berlin, Germany (May 8-11, 2004).
The English Translation of a Japanese Office Action mailed May 25, 2010 in parallel Japanese patent application No. 2007-538442; 2 pages.

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