ENCODING DEVICE AND ENCODING METHOD

Title:

ENCODING DEVICE AND ENCODING METHOD

Document Type and Number:

WIPO Patent Application WO/2013/057895

Kind Code:

A1

Abstract:

An encoding device capable of considerably reducing the amount of processing operations while inhibiting output signal quality deterioration by adaptively adjusting a conversion coefficient used in a correlation operation for each process when performing the correlation operation for an input signal, wherein frequency domain converters (701, 702) acquire a conversion coefficient in which a frequency band is divided into low end and high end, a sub-band energy calculator (703) divides either the low end or the high end frequency band of the conversion coefficient into a plurality of sub-bands, an importance assessment unit (704) sets a degree of importance for each sub-band, a sparse processor (705), according to the set importance, sets the amplitude value of a specific number of conversion coefficients, from among the plurality of conversion coefficients included in each sub-band, at zero, and a correlation analysis unit (706) calculates the correlation between the corrected conversion coefficient of one frequency band and the conversion coefficient of the other frequency band.

Inventors:

YAMANASHI TOMOFUMI
OSHIKIRI MASAHIRO

Application Number:

PCT/JP2012/006423

Publication Date:

April 25, 2013

Filing Date:

October 05, 2012

Export Citation:

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Assignee:

PANASONIC CORP (JP)

International Classes:

H03M7/30; G10L19/02

Domestic Patent References:

WO2012005212A1	2012-01-12
WO2012053146A1	2012-04-26
WO2011000408A1	2011-01-06

Foreign References:

JPH0561499A	1993-03-12
JP2007171519A	2007-07-05
JPH0561499A	1993-03-12

Other References: