Global Patent Index - EP 1164577 A2

EP 1164577 A2 2001-12-19 - Method and apparatus for reproducing speech signals

Title (en)

Method and apparatus for reproducing speech signals

Title (de)

Verfahren und Einrichtung zur Wiedergabe von Sprachsignalen

Title (fr)

Procédé et appareil pour reproduire des signaux de parole

Publication

EP 1164577 A2 (EN)

Application

EP 01121724 A

Priority

  • EP 96307741 A
  • JP 27941095 A
  • JP 28067295 A

Abstract (en)

A method for reproducing speech signals at a controlled speed whereby rate conversion of the time axis may be facilitated, and can be realized by a simplified structure based on the encoded speech data without changing the phoneme. With the speech reproducing method, an encoding unit 2 discriminates whether an input speech signal is voiced or unvoiced. Based on the results of discrimination, the encoding unit 2 performs sinusoidal synthesis and encoding for a signal portion found to be voiced, while performing vector quantization by closed-loop search for an optimum vector for a portion found to be unvoiced using an analysis-by-synthesis method, in order to find encoded parameters. The decoding unit 4 compands the time axis of the encoded parameters obtained every pre-set frames at a period modification unit 3 for modifying the output period of the parameters for creating modified encoded parameters associated with different time points corresponding to the pre-set frames. A speech synthesis unit 6 synthesizes the voiced speech portion and the unvoiced speech portion based on the modified encoded parameters. <IMAGE>

IPC 1-7 (main, further and additional classification)

G10L 19/02

IPC 8 full level (invention and additional information)

G10L 19/02 (2013.01); G10L 21/04 (2013.01)

CPC (invention and additional information)

G10L 19/02 (2013.01); G10L 21/04 (2013.01)

Designated contracting state (EPC)

DE FR GB NL

EPO simple patent family

EP 1164577 A2 20011219; EP 1164577 A3 20020109

INPADOC legal status


2004-04-28 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20031021

2003-05-28 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030410

2002-09-25 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR GB NL

2002-01-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): DE FR GB NL

2002-01-09 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7G 10L 19/02 A, 7G 10L 21/04 B

2001-12-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010918

2001-12-19 [AC] DIVISIONAL APPLICATION (ART. 76) OF:

- Document: EP 770987

2001-12-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE FR GB NL