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Patent Searching and Data


Title:
LONG-PERIOD PREDICTIVE DELAY SEARCH METHOD
Document Type and Number:
Japanese Patent JPH0744198
Kind Code:
A
Abstract:

PURPOSE: To decrease the throughput requird for a search and the amount of information on long-period predictive delay to be sent by limiting the range of the search through the use of the correlation property of the long-period predictive delay and using past long-period predictive delay.

CONSTITUTION: At ST1, an input signal X is inputted at every frame, and at ST2, long-period predictive delay plag of a previous frame is inputted. At ST3, the search range is limited to an N1+N2+N3 point nearby plag, 2*plag/3, plag/2, or plag*3 by a using the long-period predictive delay plag of the previous frame. Then synthetic filtering is peformed at ST4 for a signal a1g traced back by delay 1g in the search range from a long-period predictive filter state wherein a past driving signal is stored to generate a synthesized speech b1g. At ST5, the distance between the input signal X and synthesized speech b1g is calculated and 1g which minimize the distance d1g corresponding to delay in the search range is outputted as the ling-period predictive delay of the frame at ST6.


Inventors:
YOSHIDA TADASHI
Application Number:
JP19109693A
Publication Date:
February 14, 1995
Filing Date:
August 02, 1993
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G10L19/04; G10L19/09; (IPC1-7): G10L9/18; G10L9/14
Attorney, Agent or Firm:
Akira Kobiji (2 outside)