JPS6413598A - Voice encoder - Google Patents

Voice encoder

Info

Publication number
JPS6413598A
JPS6413598A JP62170291A JP17029187A JPS6413598A JP S6413598 A JPS6413598 A JP S6413598A JP 62170291 A JP62170291 A JP 62170291A JP 17029187 A JP17029187 A JP 17029187A JP S6413598 A JPS6413598 A JP S6413598A
Authority
JP
Japan
Prior art keywords
pulses
bits
positions
quantizing
distance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62170291A
Other languages
Japanese (ja)
Inventor
Akira Fukui
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP62170291A priority Critical patent/JPS6413598A/en
Publication of JPS6413598A publication Critical patent/JPS6413598A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To efficiently determine a pulse position and to improve the tone by reducing the number of quantized bits at the positions of a starting predetermined number of pulses less than the number of quantized bits at the positions of remaining pulses by a means which quantizes positions where multipulses supplied to a linear predictive filter rises. CONSTITUTION: This encoder is equipped with a pulse search circuit 6 as a pulse search means which determines the time positions and sizes of specified plural pulses according to autocorrelation found by a 2nd arithmetic means autocorrelation arithmetic circuit 5 and actocorrelation found by an autocorrelation arithmetic circuit 4 as a 3rd arithmetic means, and an encoding circuit 9 as an encoding means having a quantizing means which sets the number of bits for quantizing the distance between pulses in a starting time area with specified plural pulses less than the number of bits for quantizing the distance between pulses in a time area following the said time area and quantizes the distance between pulses determined by the pulse search means 6 with a specified number of bits. Consequently, the number of pulses that is encoded with a limited number of bits is increased, so the tone of an encoding voice is improved.
JP62170291A 1987-07-08 1987-07-08 Voice encoder Pending JPS6413598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62170291A JPS6413598A (en) 1987-07-08 1987-07-08 Voice encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62170291A JPS6413598A (en) 1987-07-08 1987-07-08 Voice encoder

Publications (1)

Publication Number Publication Date
JPS6413598A true JPS6413598A (en) 1989-01-18

Family

ID=15902233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62170291A Pending JPS6413598A (en) 1987-07-08 1987-07-08 Voice encoder

Country Status (1)

Country Link
JP (1) JPS6413598A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04162100A (en) * 1990-10-25 1992-06-05 Nec Corp Multiple pulse type voice coding-decoding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04162100A (en) * 1990-10-25 1992-06-05 Nec Corp Multiple pulse type voice coding-decoding device

Similar Documents

Publication Publication Date Title
DE69028176D1 (en) Adaptive transformation coding through optimal block length selection depending on differences between successive blocks
JPS6413199A (en) Inprovement in method for compression of speed digitally coded speech or audio signal
SG45452A1 (en) Adaptive quantization coder/decoder
CA2099655A1 (en) Speech encoding
DE69012405D1 (en) Device for adaptive interframe prediction coding of a video signal.
HK1133730A1 (en) Signal modification method for efficient coding of speech signals
CA2186433A1 (en) Speech coding apparatus having amplitude information set to correspond with position information
DE69132956T2 (en) Speech coding through linear prediction with increased high frequencies
DE3786412D1 (en) METHOD AND DEVICE FOR DIGITAL SIGNAL CODING BY QUANTIZATION.
EP0402149A3 (en) Coding device
FR2740640B1 (en) METHOD FOR DETERMINING THE TYPE AND CODING MODE FOR CODING THE SHAPE OF AN OBJECT
NZ235702A (en) Digital speech coder with optimised signal energy parameters
DE68923771D1 (en) Voice transmission system using multi-pulse excitation.
DE69611607D1 (en) QUANTIZATION OF A DIVIDED PREDICTION MATRIX WITH SPECTRAL PARAMETERS FOR EFFECTIVE LANGUAGE CODING
JPS6413598A (en) Voice encoder
EP0104469A3 (en) Digital dpcm coder with high processing speed
JPS6434067A (en) Halftone image encoder
JPS5324206A (en) Adaptive linear prediction unit
WO2000016315A3 (en) Linear predictive analysis-by-synthesis encoding method and encoder
ATE42853T1 (en) METHOD AND DEVICE FOR ENCODING DIGITAL SIGNALS.
JPH0272400A (en) Multipulse speech encoding device
JPS6413597A (en) Voice encoder
JPS6454499A (en) Pulse searching for multi-pulse voice encoding
JPS52114257A (en) Encoder device
JPS5723867A (en) Retrieval system of cable line number