ENCODING METHOD, DEVICE, PROGRAM, AND RECORDING MEDIUM

Title:

ENCODING METHOD, DEVICE, PROGRAM, AND RECORDING MEDIUM

Document Type and Number:

WIPO Patent Application WO/2016/017238

Kind Code:

A1

Abstract:

The purpose of the present invention is to provide an encoding technique that enables efficient encoding of input acoustic signals regardless of the characteristics thereof and that provides decoded acoustic signals that a listener is less likely to perceive as unnatural. Provided is an encoding method with which input acoustic signals are encoded, per frame constituting a time segment lasting a predetermined period, by an encoding process set from among multiple encoding processes in the frequency domain, wherein, when at least one of the magnitude of the energy of high-frequency components in an input acoustic signal of the preceding frame and the magnitude of the energy of high-frequency components in an input acoustic signal of the current frame is less than or equal to a predetermined threshold, a setting unit 380 makes it possible to set, as the encoding process to be used for the current frame, an encoding process that differs from the encoding process used for the preceding frame.

Inventors:

MORIYA TAKEHIRO (JP)
KAMAMOTO YUTAKA (JP)
HARADA NOBORU (JP)

Application Number:

PCT/JP2015/063989

Publication Date:

February 04, 2016

Filing Date:

May 15, 2015

Export Citation:

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Assignee:

NIPPON TELEGRAPH & TELEPHONE (JP)

International Classes:

G10L19/22; G10L19/20; H03M7/30

Foreign References:

JP2012098735A	2012-05-24
JP2005534950A	2005-11-17
US5742734A	1998-04-21

Other References: