Title:
音声復号化方法
Document Type and Number:
Japanese Patent JP3617503
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To solve such problems that the quality of reproduced audio signals is low in a conventional waveform restoration method which repeatedly uses the parameters of a past frame when a coding error is generated and the delay becomes longer in a conventional method that conducts interpolation using the information of a future frame. SOLUTION: In the voice decoding method, spectrum information of coded voice and sound source information are decoded in a frame unit and the voice are reproduced. When detection is made indicating that the decoding of the code is not correctly performed, the condition of the reproduced voice in a previous frame is judged and the reproduction restoration of the voice of a current frame is conducted in accordance with the judgment made above.
Inventors:
Tadashi Yamaura
Hirohisa Tazaki
Hirohisa Tazaki
Application Number:
JP2002123468A
Publication Date:
February 09, 2005
Filing Date:
April 25, 2002
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G10L19/12; G10L13/00; G10L13/04; G10L19/005; G10L19/04; H03M7/36; H04L1/00; (IPC1-7): G10L19/12; G10L13/00; G10L19/04
Domestic Patent References:
| JP6202696A | ||||
| JP3116200A | ||||
| JP8046577A | ||||
| JP5235874A | ||||
| JP6326670A | ||||
| JP8123497A |
Attorney, Agent or Firm:
Shogo Takahashi
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka