Patent Number: 6,167,373

Title: Linear prediction coefficient analyzing apparatus for the auto-correlation function of a digital speech signal

Abstract: A sample speech is analyzed by a speech analyzing unit to obtain sample characteristic parameters, and a coding distortion is calculated from the sample characteristic parameters in each of a plurality of coding modules. The sample characteristic parameters and the coding distortions are statistically processed by a statistical processing unit to obtain a coding module selecting rule. Thereafter, when a speech is analyzed by the speech analyzing unit to obtain characteristic parameters, an appropriate coding module is selected by a coding module selecting unit from the coding modules according to the coding module selecting rule on condition that a coding distortion for the characteristic parameters is minimized in the appropriate coding module. Thereafter, the characteristic parameters of the speech are coded in the appropriate coding module, and a coded speech is obtained. When the coded speech is decoded, a reproduced speech is obtained. Accordingly, because an appropriate coding module can be easily selected from a plurality of coding modules according to the coding module selecting rule, any allophone occurring in a reproduced speech can be prevented at a low calculation volume.

Inventors: Morii; Toshiyuki (Tokyo, JP)

Assignee: Matsushita Electric Industrial Co., Ltd.

International Classification: G10L 19/14 (20060101); G10L 21/02 (20060101); G10L 19/06 (20060101); G10L 19/00 (20060101); G10L 21/00 (20060101); G10L 11/00 (20060101); G10L 11/04 (20060101); G10L 019/04 (); G10L 011/00 (); G10L 013/02 ()

Expiration Date: 12/26/2017