JPS6484300A - Voice spectrum encoding system - Google Patents

Voice spectrum encoding system

Info

Publication number
JPS6484300A
JPS6484300A JP62242274A JP24227487A JPS6484300A JP S6484300 A JPS6484300 A JP S6484300A JP 62242274 A JP62242274 A JP 62242274A JP 24227487 A JP24227487 A JP 24227487A JP S6484300 A JPS6484300 A JP S6484300A
Authority
JP
Japan
Prior art keywords
power spectrum
predicted value
voice
frame
error
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
JP62242274A
Other languages
Japanese (ja)
Inventor
Koji Okazaki
Hidehira Iseda
Tomohiko Taniguchi
Fumio Amano
Shigeyuki Umigami
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62242274A priority Critical patent/JPS6484300A/en
Publication of JPS6484300A publication Critical patent/JPS6484300A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To efficiently encode a voice by utilizing not only prediction based on past encoded vectors but also correlations of adjacent frequencies in a current vector in encoding the voice. CONSTITUTION: A DFT(digital Fourier transform) means 22 subjects each frame of an input voice to DFT at a point TN in accordance with a pitch period TN to obtain a power spectrum, and a subtraction means 23 obtains the error between the power spectrum and its predicted value. An addition means 24 adds the error value and the predicted value of the power spectrum to obtain a reproduced power spectrum, and a predicted value operation means 25 adds an inter-frame predicted value obtained from the reproduced power spectrum and the preceding power spectrum and an intra-frame predicted value obtained from the power spectrum in the current frame to obtain a predicted value of the power spectrum. The voice is efficiently encoded by the pitch period TN and the error signal which are obtained in this manner.
JP62242274A 1987-09-26 1987-09-26 Voice spectrum encoding system Pending JPS6484300A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62242274A JPS6484300A (en) 1987-09-26 1987-09-26 Voice spectrum encoding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62242274A JPS6484300A (en) 1987-09-26 1987-09-26 Voice spectrum encoding system

Publications (1)

Publication Number Publication Date
JPS6484300A true JPS6484300A (en) 1989-03-29

Family

ID=17086822

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62242274A Pending JPS6484300A (en) 1987-09-26 1987-09-26 Voice spectrum encoding system

Country Status (1)

Country Link
JP (1) JPS6484300A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04504936A (en) * 1989-04-17 1992-08-27 フラウンホッファー―ゲゼルシャフト　ツァ　フェルダールング　デァ　アンゲヴァンテン　フォアシュンク　エー．ファオ． Digital encoding method
JPH0669810A (en) * 1992-08-20 1994-03-11 Victor Co Of Japan Ltd Transmitting device for acoustic signal
JPH0697836A (en) * 1992-09-11 1994-04-08 Victor Co Of Japan Ltd Acoustic signal transmission method
JPH06140936A (en) * 1992-10-23 1994-05-20 Victor Co Of Japan Ltd Transmission method for acoustic signal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04504936A (en) * 1989-04-17 1992-08-27 フラウンホッファー―ゲゼルシャフト　ツァ　フェルダールング　デァ　アンゲヴァンテン　フォアシュンク　エー．ファオ． Digital encoding method
JPH0669810A (en) * 1992-08-20 1994-03-11 Victor Co Of Japan Ltd Transmitting device for acoustic signal
JPH0697836A (en) * 1992-09-11 1994-04-08 Victor Co Of Japan Ltd Acoustic signal transmission method
JPH06140936A (en) * 1992-10-23 1994-05-20 Victor Co Of Japan Ltd Transmission method for acoustic signal

Similar Documents

Publication Publication Date Title
JPS54116149A (en) Coder and decoder system
EP0379217A3 (en) Inter-frame predictive encoding system
CA2060341A1 (en) Predictive coding device capable of coding image data signals without a discontinuity among blocks
FI901458A0 (en) Motion estimator
GB2003001A (en) Improvements in methods and apparatus for coding digital television signals
KR19980058235A (en) Video coding device
JPS6484300A (en) Voice spectrum encoding system
JPS542050A (en) Block coding and decoding system
KR920015927A (en) Inter-frame and inter-field prediction coding apparatus
EP0699002A3 (en) Predictive vector quantization with input control circuit
KR870002732A (en) Differential coding circuit
JPS56152386A (en) Coding system of picture signal
EP0859354A3 (en) LSP prediction coding method and apparatus
JPS56143776A (en) Interframe encoder
JPS5738083A (en) Orthogonal conversion decoder
JPS5315019A (en) Composite prediction encoding/decoding unit
JPS55110429A (en) Composite unit
JPS52119018A (en) Difference coding
JPS54150013A (en) Digital signal transmission system
JPS6432576A (en) Decoding method for moving image signal and its decoder
JPS52122041A (en) Color video signal predictive coding
JPS6482769A (en) Image conversion predicting system
JPS60172847A (en) Adaptive forecast coding system
JPS56109084A (en) Decoder for adaptive prediction for picture signal
JPS5514738A (en) Predictive encoding device for color television signal