Title:
【発明の名称】音声の復号化方法およびその装置
Document Type and Number:
Japanese Patent JP3085347
Kind Code:
B2
Abstract:
PURPOSE: To suppress the quality deterioration of the decoded voice small even when the state of a transmission line is bad in the drive type linear prediction coding/decoding using a noise code table. CONSTITUTION: When the present frame contains a transmission error in the received data R transmitted from a coder, the exception process section 12 of a decoder estimates the information transmitted from internal states Cn-3, Cn-2, Cn-1 corresponding to the transmitted information in the past frame, replaces the received data R, updates the internal state held in a buffer 10 with the estimated information, and maintains the consistency when the correct received data R are sent at the time of the information transmission in the next frame.
Inventors:
Akitoshi Kataoka
Jotaro Ikedo
Jotaro Ikedo
Application Number:
JP24444494A
Publication Date:
September 04, 2000
Filing Date:
October 07, 1994
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G10L19/08; G10L19/00; G10L19/005; G10L19/04; G10L19/06; G10L19/16; G10L19/22; H04B14/04; (IPC1-7): G10L19/06; G10L19/04; H04B14/04
Domestic Patent References:
| JP6130999A | ||||
| JP2282299A | ||||
| JP4301698A |
Other References:
Ｈ．Ｏｈｍｕｒｏ，ｅｔ．ａｌ．”Ｃｏｄｉｎｇ ｏｆ ＬＳＰ Ｐａｒａｍｅｔｅｒｓ Ｕｓｉｎｇ Ｉｎｔｅｒｆｒａｍｅ Ｍｏｖｉｎｇ Ａｖｅｒａｇｅ Ｐｒｅｄｉｃｔｉｏｎ ａｎｄ Ｍｕｌｔｉ Ｓｔａｇｅ Ｖｅｃｔｏｒ Ｑｕａｎｔｉｚａｔｉｏｎ”，Ｓｐｅｅｃｈ Ｃｏｄｉｎｇ ｆｏｒ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ，１９９３，Ｐｒｏｃｅｅｄｉｎｇｓ，ＩＥＥＥ Ｗｏｒｋｓｈｏｐ ｏｎ．１９９３，ｐｐ６３−６４
Attorney, Agent or Firm:
Masatake Shiga