Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1996-10-17
1997-06-17
Tse, Young T.
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
364725, A04B 1400
Patent
active
056404212
ABSTRACT:
An MDCT calculating circuit includes an x.sub.01 calculating circuit for multiplying input signals with a forward transforming window and a linear forward transforming unit for linear forward transforming an output signal of the calculating circuit. The linear forward transforming unit includes an x.sub.02 calculating circuit and an x.sub.03 calculating circuit for pre-processing the output signal of the x.sub.01 calculating circuit and an integration and summation processing circuit for executing integration and summation processing operations on an output signal of the pre-processing unit. The integration and summation processing circuit executes an integration and summation operation on an N/2 number of input signals from the pre-processing unit by grouping a k number of input signals as a processing unit and iteratively executes the integration and summation processing operations a N/(2*K) number of times for outputting a sum total of N/2 number of signals.
REFERENCES:
patent: 5218561 (1993-06-01), Iwadare
patent: 5311549 (1994-05-01), Mahieux
patent: 5349549 (1994-09-01), Tsutsui
"Adaptive Transform Encoding With Adaptive Block Lengths Using MDCT," by Uzu, Sugiyama, Iwatare and Nishiya in Extended Abstracts in Spring Meeting of Japan Society of Electronic Information Communication 1990, A-197.
Research "On A Modified Discrete Cosine Transorm (MDCT) And Its Fast Algorithm," by Iwatare, Nishiya and Sugiyama, C&C Systems Research Laboratories, NEC Corporation, CAS 90-9, DSP 90-13, pp. 49-54.
"Fast Fourier Transform," by E. Oran Bringham, translated by Miyagawa and Imai, pp. 196-198.
"Constraint Conditions For Multiple-Blocksize Modified-DCT," by Mochizuki, Yano and Nishitani in Shingaku-ghio, CAS 90-10, DSP90-14, pp. 55-60.
Sonohara Mito
Tsutsui Kyoya
Sony Corporation
Tse Young T.
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