Title:
【発明の名称】マルチパルス探索処理方法と音声符号化装置
Document Type and Number:
Japanese Patent JP3372908
Kind Code:
B2
Abstract:
A speech coding apparatus includes a pulse position candidate table, inter-pulse distortion table, first and second reference address tables, first and second reference address table creation units, and search table creation unit. The pulse position candidate table stores the pulse position candidate of each pulse. The inter-pulse distortion table stores a distortion calculated every pulse interval. The first reference address table creation unit regards the pulse position of the inter-pulse distortion table as a relative distance from the start of the inter-pulse distortion table, calculates a distortion every pulse interval to obtain the absolute address of the inter-pulse distortion table, and stores it in the first reference address table. The second reference address table creation unit regards the pulse position of the inter-pulse distortion table as a relative distance from the start of a multipulse search table, calculates a distortion every pulse interval to obtain the absolute address of the multipulse search table, and stores it in the second reference address table. The search table creation unit reads out absolute addresses from the first and second reference address tables, and creates the multipulse search table using them. A multipulse search processing method is also disclosed.
Inventors:
Katsuya Misu
Application Number:
JP26373399A
Publication Date:
February 04, 2003
Filing Date:
September 17, 1999
Export Citation:
Assignee:
NC Microsystem Co., Ltd.
International Classes:
G10L19/08; G10L19/10; G10L19/12; H03M7/30; H04B14/04; (IPC1-7): G10L19/10; G10L19/12; H03M7/30; H04B14/04
Domestic Patent References:
| JP7160298A | ||||
| JP11119799A | ||||
| JP11126096A |
Attorney, Agent or Firm:
Nobuyuki Kaneda (2 others)