Title:
音声復号化装置および音声復号化方法
Document Type and Number:
Japanese Patent JP4437052
Kind Code:
B2
Abstract:
To reduce degradation of subjective quality in voice frames after a lost frame when a voice frame is lost in the changeover of a voice mode.
In this voice decoding device, whether a current frame corresponds to a lost frame or not is determined (ST 1100), and when the current frame is not the lost frame, whether a frame in front of the lost frame corresponds to a lost frame or not is judged(ST1300). When the front frame is the lost frame, whether there is a frame class changeover from a noise-signal to a voiced regular signal or not is confirmed(ST1400). When there is the frame class changeover, a decoding processing C(Overlap Add processing ) is performed to this frame(ST1500).
COPYRIGHT: (C)2006,JPO&NCIPI
Inventors:
Hiroyuki Ehara
Application Number:
JP2004125943A
Publication Date:
March 24, 2010
Filing Date:
April 21, 2004
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
G10L13/00; G10L19/00; G10L19/005; G10L19/08; G10L19/12; G10L19/16; G10L25/93
Domestic Patent References:
| JP2003029799A | ||||
| JP7036496A |
Attorney, Agent or Firm:
Koichi Washida