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Patent Searching and Data


Title:
ACOUSTIC SIGNAL PROCESSING SYSTEM, ACOUSTIC SIGNAL DECODING DEVICE, AND PROCESSING METHOD AND PROGRAM THEREIN
Document Type and Number:
WIPO Patent Application WO/2010/150635
Kind Code:
A1
Abstract:
The calculation amount of an acoustic signal decoding device, which is involved in the signal transformation processing from a frequency domain into a time domain is reduced while implementing the generation of a proper output acoustic signal. An output control unit (340) receives from a code string separation unit (310) sets of window information including a window shape indicating the type of a window function associated with the window curtain processing of an input channel, and switches the connections of output switching units (351 to 355) to a frequency domain mixing unit (510) if all the sets of window information are the same. The frequency domain mixing unit (510) mixes the frequency domain signals of a 5-channel from a decoding/inverse quantization unit (320) with one another on the basis of down-mix information for making the number of output channels less than the number of input channels. Inverse Modified Discrete Cosine Transform (IMDCT)/window curtain processing units (521, 522) transform the frequency domain signals of a 2-channel outputted from the frequency domain mixing unit (510) into time domain signals, and outputs the transformed signals as the acoustic signals of the 2-channel.

Inventors:
TSUJI MINORU (JP)
CHINEN TORU (JP)
Application Number:
PCT/JP2010/059440
Publication Date:
December 29, 2010
Filing Date:
June 03, 2010
Export Citation:
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Assignee:
SONY CORP (JP)
TSUJI MINORU (JP)
CHINEN TORU (JP)
International Classes:
G10L19/00; G10L19/008
Foreign References:
JPH09252254A1997-09-22
JP2002536681A2002-10-29
JP2001265394A2001-09-28
JP2004206771A2004-07-22
JP2006146247A2006-06-08
JP3279228B22002-04-30
Other References:
See also references of EP 2426662A4
Attorney, Agent or Firm:
MIYATA, Masaaki et al. (JP)
Miyata Masaaki (JP)
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