Title:
CODE EXCITATION LINEAR PREDICTION ENCODING DEVICE
Document Type and Number:
Japanese Patent JP3050966
Kind Code:
B2
Abstract:
PURPOSE: To convert a gain index by code excitation linear prediction encoding to a low bit.
CONSTITUTION: The device is provided with an RMS calculating circuit 304 for predicting amplitude of a statistical excitation vector by deforming the statistical excitation vectors based on an RMS(Root Mean Square) of an adaptive excitation vector, and a multiplier 306. Also, this device is provided with a VQ gain code book 305 obtained by vector-quantizing statistical excitation gain and adaptive excitation gain. According to this constitution. with regard to an excitation gain index, even if it is converted to a low bit, an excellent composite voice quality is obtained.
Inventors:
Hiromi Aoyagi
Hiroshi Katsuragawa
Yoshihiro Ariyama
Hiroshi Katsuragawa
Yoshihiro Ariyama
Application Number:
JP25606791A
Publication Date:
June 12, 2000
Filing Date:
October 03, 1991
Export Citation:
Assignee:
Oki Electric Industry Co., Ltd.
International Classes:
G10L19/12; G10L19/038; G10L19/04; G10L19/08; G10L19/083; H03M7/30; (IPC1-7): G10L19/12; G10L19/04; H03M7/30
Domestic Patent References:
| JP154497A | ||||
| JP4270400A |
Attorney, Agent or Firm:
Kenji Ohnishi