Title:
VOICE CODING DEVICE
Document Type and Number:
Japanese Patent JP3249012
Kind Code:
B2
Abstract:
PURPOSE: To provide a voice coding device in which low bit rate processing and voice signal processing are realized on a piece of DSP.
CONSTITUTION: The coder of the device is provided with a TC input buffer 1 which stores voice input signals, a counter section 2 which counts the number of data, a TC processing section 3 which detects a pitch period when the counted value exceeds a prescribed threshold and executes time axis compression to the detected pitch period to be the half period, a CELP-I/F buffer 4 which stores the time axis compressed data, a CELP coding processing section 5 which selects a coding book in which the difference between the voice obtd. by subjecting the data concerned to vector processing and the composed voice becomes a minimum and conducts a voice compression and a CELP output buffer 6 which temporarily stores the processed data.
Inventors:
Shuhide Eguchi
Miki Murakawa
Takashi Fujino
Mitsuru Tsuboi
Toshiaki Nobumoto
Toshiyuki Ohta
Miki Murakawa
Takashi Fujino
Mitsuru Tsuboi
Toshiaki Nobumoto
Toshiyuki Ohta
Application Number:
JP14038394A
Publication Date:
January 21, 2002
Filing Date:
June 22, 1994
Export Citation:
Assignee:
富士通株式会社
International Classes:
G10L19/038; G10L19/00; G10L19/08; G10L19/12; G10L19/16; H04B14/04; (IPC1-7): G10L19/00; G10L19/12; H04B14/04
Domestic Patent References:
| JP63287226A | ||||
| JP546199A | ||||
| JP294832A | ||||
| JP61121094A | ||||
| JP6161497A | ||||
| JP2281300A | ||||
| JP193799A |
Attorney, Agent or Firm:
Takashi Ishida (3 others)