Title:
【発明の名称】ATM音声符号化装置
Document Type and Number:
Japanese Patent JP2697642
Kind Code:
B2
Abstract:
An LD-CELP coder 211 codes an input signal supplied through a telephone line based on the low-delay code-excited linear prediction. A speech detector 212 detects voice/no-voice of the input signal. A FAX terminal input detector 213 detects a FAX signal. A multiplexer 214 multiplexes the coded data and the voice/no-voice data through bit steal of one bit per frame from the code. In a CLAD (cell assembling and disassembling) unit 300, a speech data frame is detected, and also the voice/no-voice information that has been multiplexed in the coded data is detected. If the voice/no-voice information indicates voice, the coded data is converted to cell data to be sent out to a transmission line. Concurrently with the operation of the coder, FAX terminal input data is all converted to cell data and sent out to the transmission line independently of the voice/no-voice information.
Inventors:
Wake Yasuhiro
Application Number:
JP28933594A
Publication Date:
January 14, 1998
Filing Date:
November 24, 1994
Export Citation:
Assignee:
NEC
International Classes:
G10L19/038; G10L19/00; G10L19/04; G10L19/08; G10L19/12; G10L25/78; H03M7/30; H04J3/16; H04J3/24; H04N1/00; H04Q3/00; H04Q11/04; H04L12/56; (IPC1-7): H04Q3/00; H04L12/28
Domestic Patent References:
| JP522153A | ||||
| JP2181552A |
Attorney, Agent or Firm:
Wakabayashi Tadashi