Title:
VECTOR QUANTIZATION METHOD
Document Type and Number:
Japanese Patent JP3700310
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To perform the prediction encoding of a gain and to perform encoding by a small bit number by obtaining the correlation of power and the two pieces of gain information (adaptive code vector gain and probable code vector gain) by the parameter quantization of a voice encoder.
SOLUTION: An inputted optimum gain 11 (the gain of an adaptive sound source and the gain of a probable sound source) is converted to the vector (input) of the element of a ratio and a sum in a parameter conversion part 12. In a target extraction part 13, based on the vector obtained in the parameter conversion part 12, a target vector is obtained by using a decoding vector in the past stored in a decoding vector storage part 14 and a prediction coefficient stored in a prediction coefficient storage part 15. In a distance calculation part 16, by using the prediction coefficient, a distance between the target vector obtained in the target extraction part 13 and the code vector of a vector code book 17 is calculated. A comparison part 18 obtains the vector for minimizing the calculated distance and turns it to the code 19 of the gain.
More Like This:
Inventors:
Toshiyuki Morii
Application Number:
JP3458397A
Publication Date:
September 28, 2005
Filing Date:
February 19, 1997
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
G10L15/10; G10L19/038; G10L19/125; G10L19/16; H03M7/30; (IPC1-7): H03M7/30; G10L15/10; G10L19/00
Domestic Patent References:
| JP4190399A | ||||
| JP9269800A | ||||
| JP9214350A | ||||
| JP3138700A |
Attorney, Agent or Firm:
Fumio Iwahashi
Tomoyasu Sakaguchi
Hiroki Naito
Tomoyasu Sakaguchi
Hiroki Naito