Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
VECTOR QUANTIZER
Document Type and Number:
Japanese Patent JPH0556008
Kind Code:
A
Abstract:

PURPOSE: To improve the information compression efficiency by storing the result of collation at least by one frame.

CONSTITUTION: Upon the receipt of spectrum information 106, an element 431 of each code vector is read from a code book 401 of a collation section 400, and a distance calculation section 402 calculates the distance of vectors 106. In the case of retrieving all numbers, a distance 403 of all code vectors in the code book is calculated and the result is fed to a minimum value detection section 404, and a pointer 405 of a code vector (nearest vector) whose value 403 is minimized is outputted. Thus, when the input vector is expressed by plural code vectors, it is not required to send part of the pointer of the code vector. In this case, since quantization distortion is hardly increased, the information compression efficiency is enhanced.


Inventors:
ASAKAWA YOSHIAKI
YAMAZAKI KATSUYA
ICHIKAWA HIROSHI
Application Number:
JP26735691A
Publication Date:
March 05, 1993
Filing Date:
October 16, 1991
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI LTD
International Classes:
G10L25/00; G10L15/02; G10L19/038; H03M7/30; H04B14/04; (IPC1-7): G10L3/00; G10L9/18; H03M7/30; H04B14/04
Attorney, Agent or Firm:
Ogawa Katsuo



 
Next Patent: TRANSMITTER-RECEIVER