Title:
VOICE ENCODING DEVICE, VOICE ENCODING METHOD, VOICE ENCODING COMPUTER PROGRAM, VOICE DECODING DEVICE, VOICE DECODING METHOD, AND VOICE DECODING COMPUTER PROGRAM
Document Type and Number:
Japanese Patent JP2016035501
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a voice encoding device that can improve the quality of a reproduced sound, while suppressing the encoding ratio of a voice signal having a tone component and a noise component mixed therein.SOLUTION: A voice encoding device 1 includes: a time frequency conversion part 11 that performs time frequency conversion to a voice signal in a frame unit having a predetermined time length to convert the voice signal into a frequency signal; a phase random band detection part 12 that detects, for each frame, a first frequency band where the phase component of the frequency signal becomes random; an outline information extraction part 13 that determines, for each frame, outline information showing the outline of an amplitude component of the frequency signal included in the first frequency band; an encoding part 15 that encodes, for each frame, a frequency signal included in a frequency band other than the first frequency band; and a coupling part 16 that creates a data stream including the encoded frequency signal and the outline information.SELECTED DRAWING: Figure 4
Inventors:
KAMANO AKIRA
KISHI YOHEI
OTANI TAKESHI
KISHI YOHEI
OTANI TAKESHI
Application Number:
JP2014157897A
Publication Date:
March 17, 2016
Filing Date:
August 01, 2014
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
G10L19/00; G10L19/035; G10L21/0388; H03M7/30
Attorney, Agent or Firm:
Atsushi Aoki
Koichi Itsubo
Higuchi Souji
Koichi Itsubo
Higuchi Souji