Title:
フレーム損失隠蔽の方法及び装置
Document Type and Number:
Japanese Patent JP5192588
Kind Code:
B2
Abstract:
A method for concealing lost frame includes: using history signals before the lost frame that corresponds to a lost MDCT coefficient to generate a first synthesized signal when it is detected that the MDCT coefficient is lost; performing fast IMDCT for the first synthesized signal to obtain an IMDCT coefficient corresponding to a lost MDCT coefficient; and using the IMDCT coefficient corresponding to the lost MDCT coefficient and an IMDCT coefficient adjacent to the IMDCT coefficient corresponding to the lost MDCT coefficient to perform TDAC and obtain signals corresponding to the lost frame. An apparatus for concealing lost frame is also disclosed herein. The method and the apparatus for concealing lost frames in the embodiments of the present invention make full use of the received partial signals to recover high-quality voice signals and improve the QoS.
Inventors:
Jean, goose
One, donch
One, donch
Application Number:
JP2011509843A
Publication Date:
May 08, 2013
Filing Date:
February 16, 2009
Export Citation:
Assignee:
HUAWEI TECHNOLOGIES CO.,LTD.
International Classes:
G10L19/005; G10L19/02
Domestic Patent References:
| JP2005266458A | ||||
| JP2004252109A |
Foreign References:
| WO2005109402A1 | ||||
| WO2006137425A1 |
Other References:
大室仲他,”音声特徴量保護によるバースト的なパケット消失補償”,日本音響学会2004年秋季研究発表会講演論文集-I-,2004年 9月,pp.299-300
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Katsuichi Nishimoto
Kato Kazunori
Katsuichi Nishimoto