GB1266929A - - Google Patents

Info

Publication number
GB1266929A
GB1266929A GB1266929DA GB1266929A GB 1266929 A GB1266929 A GB 1266929A GB 1266929D A GB1266929D A GB 1266929DA GB 1266929 A GB1266929 A GB 1266929A
Authority
GB
United Kingdom
Prior art keywords
samples
sample
parameters
difference
speech
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.)
Expired
Application number
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 filed Critical
Publication of GB1266929A publication Critical patent/GB1266929A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

1,266,929. Selective signalling. WESTERN ELECTRIC CO. Inc. 14 Aug., 1969 [19 Aug., 1968], No. 40748/69. Heading G4H. In order to transmit speech digitally signals are transmitted representing the difference between actual speech samples and predicted speech samples, and the parameters utilized in making the predictions. As described input speech, Fig. 1, is filtered 10, sampled 11 and delayed 12 by 60 samples. The difference # N is then formed 13 between each sample S N and a corresponding predicted sample Z N . This difference # N is then amplified by Q, quantized S<SP>1</SP> N 15 to one of two levels, and transmitted. The quantized difference S<SP>1</SP> N is amplified by 1/Q, and added 17 to the predicted sample Z N to produce a reconstructed sample r N which, together with preceding reconstructed samples, is used 30 to predict the next sample Z N + 1 The parameters b, k and α utilized in the prediction, and the amplifier gain Q, are also transmitted. All of these parameters are computed 40 every 30 samples (5 msec.) by reference to the preceding 120 samples received direct from the samples 11-delay 12 only being present in order to provide time for this to be done. The Specification contains precise and extensive mathematical information about these parameters and illustrates methods of computing them by block diagrams.
GB1266929D 1968-08-19 1969-08-14 Expired GB1266929A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75340868A 1968-08-19 1968-08-19

Publications (1)

Publication Number Publication Date
GB1266929A true GB1266929A (en) 1972-03-15

Family

ID=25030515

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1266929D Expired GB1266929A (en) 1968-08-19 1969-08-14

Country Status (9)

Country Link
US (1) US3631520A (en)
JP (1) JPS5021203B1 (en)
BE (1) BE737031A (en)
DE (1) DE1941336C3 (en)
ES (1) ES371061A1 (en)
FR (1) FR2016969A1 (en)
GB (1) GB1266929A (en)
NL (1) NL176822C (en)
SE (1) SE351066B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128825A (en) * 1982-10-20 1984-05-02 Dbx Analog to digital and digital to analog converter

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US3740476A (en) * 1971-07-09 1973-06-19 Bell Telephone Labor Inc Speech signal pitch detector using prediction error data
US3742138A (en) * 1971-08-30 1973-06-26 Bell Telephone Labor Inc Predictive delayed encoders
US3784747A (en) * 1971-12-03 1974-01-08 Bell Telephone Labor Inc Speech suppression by predictive filtering
US3715512A (en) * 1971-12-20 1973-02-06 Bell Telephone Labor Inc Adaptive predictive speech signal coding system
BE793564A (en) * 1971-12-30 1973-04-16 Western Electric Co ANALOGUE-DIGITAL CONVERTER
US4008435A (en) * 1972-05-30 1977-02-15 Nippon Electric Company, Ltd. Delta modulation encoder
US3916105A (en) * 1972-12-04 1975-10-28 Ibm Pitch peak detection using linear prediction
CH581878A5 (en) * 1974-07-22 1976-11-15 Gretag Ag
US3975587A (en) * 1974-09-13 1976-08-17 International Telephone And Telegraph Corporation Digital vocoder
JPS5154714A (en) * 1974-10-16 1976-05-14 Nippon Telegraph & Telephone Tajuonseidensohoshiki
FR2312884A1 (en) * 1975-05-27 1976-12-24 Ibm France BLOCK QUANTIFICATION PROCESS OF SAMPLES OF AN ELECTRIC SIGNAL, AND DEVICE FOR IMPLEMENTING THE SAID PROCESS
NL174611C (en) * 1975-06-12 1984-07-02 Philips Nv DIFFERENTIAL PULSE CODE MODULATION TRANSMISSION SYSTEM.
US3973081A (en) * 1975-09-12 1976-08-03 Trw Inc. Feedback residue compression for digital speech systems
US4121051A (en) * 1977-06-29 1978-10-17 International Telephone & Telegraph Corporation Speech synthesizer
SE433998B (en) * 1977-10-11 1984-06-25 Carl Erik Wilhelm Sundberg SIGNAL RECEIVER DEVICE TO COMPENSATE DIGITAL ERRORS IN TRANSFER DIGITAL SIGNAL
US4133976A (en) * 1978-04-07 1979-01-09 Bell Telephone Laboratories, Incorporated Predictive speech signal coding with reduced noise effects
USRE32124E (en) * 1980-04-08 1986-04-22 At&T Bell Laboratories Predictive signal coding with partitioned quantization
US4354057A (en) * 1980-04-08 1982-10-12 Bell Telephone Laboratories, Incorporated Predictive signal coding with partitioned quantization
US4509150A (en) * 1980-12-31 1985-04-02 Mobil Oil Corporation Linear prediction coding for compressing of seismic data
US4532494A (en) * 1981-01-09 1985-07-30 Tokyo Shibaura Denki Kabushiki Kaisha Adaptive delta codec which varies a delta signal in accordance with a characteristic of an input analog signal
FR2515901A1 (en) * 1981-11-04 1983-05-06 Trt Telecom Radio Electr MIC-DIFFERENTIAL TRANSMISSION SYSTEM WITH ADAPTIVE PREDICTION
US4437087A (en) * 1982-01-27 1984-03-13 Bell Telephone Laboratories, Incorporated Adaptive differential PCM coding
US4561102A (en) * 1982-09-20 1985-12-24 At&T Bell Laboratories Pitch detector for speech analysis
JPS59153346A (en) * 1983-02-21 1984-09-01 Nec Corp Voice encoding and decoding device
AU572556B2 (en) * 1983-10-07 1988-05-12 Dolby Laboratories Licensing Corporation A/d encoder and decoder
US4700362A (en) * 1983-10-07 1987-10-13 Dolby Laboratories Licensing Corporation A-D encoder and D-A decoder system
US4701954A (en) * 1984-03-16 1987-10-20 American Telephone And Telegraph Company, At&T Bell Laboratories Multipulse LPC speech processing arrangement
US4709390A (en) * 1984-05-04 1987-11-24 American Telephone And Telegraph Company, At&T Bell Laboratories Speech message code modifying arrangement
US4617676A (en) * 1984-09-04 1986-10-14 At&T Bell Laboratories Predictive communication system filtering arrangement
US4719642A (en) * 1985-02-27 1988-01-12 Scientific Atlanta, Inc. Error detection and concealment using predicted signal values
US4675863A (en) 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
US4726037A (en) * 1986-03-26 1988-02-16 American Telephone And Telegraph Company, At&T Bell Laboratories Predictive communication system filtering arrangement
EP0289285A3 (en) * 1987-04-30 1989-11-29 Oki Electric Industry Company, Limited Linear predictive coding analysing apparatus and bandlimited circuit therefor
US4791654A (en) * 1987-06-05 1988-12-13 American Telephone And Telegraph Company, At&T Bell Laboratories Resisting the effects of channel noise in digital transmission of information
US4817157A (en) * 1988-01-07 1989-03-28 Motorola, Inc. Digital speech coder having improved vector excitation source
US4896361A (en) * 1988-01-07 1990-01-23 Motorola, Inc. Digital speech coder having improved vector excitation source
US5274559A (en) * 1988-10-19 1993-12-28 Hitachi, Ltd. Method for predicting a future value of measurement data and for controlling engine fuel injection based thereon
US5127055A (en) * 1988-12-30 1992-06-30 Kurzweil Applied Intelligence, Inc. Speech recognition apparatus & method having dynamic reference pattern adaptation
US5261027A (en) * 1989-06-28 1993-11-09 Fujitsu Limited Code excited linear prediction speech coding system
JPH0332228A (en) * 1989-06-29 1991-02-12 Fujitsu Ltd Gain-shape vector quantization system
US5263119A (en) * 1989-06-29 1993-11-16 Fujitsu Limited Gain-shape vector quantization method and apparatus
JPH0365822A (en) * 1989-08-04 1991-03-20 Fujitsu Ltd Vector quantization coder and vector quantization decoder
US5195168A (en) * 1991-03-15 1993-03-16 Codex Corporation Speech coder and method having spectral interpolation and fast codebook search
US5546383A (en) 1993-09-30 1996-08-13 Cooley; David M. Modularly clustered radiotelephone system
DE19729494C2 (en) * 1997-07-10 1999-11-04 Grundig Ag Method and arrangement for coding and / or decoding voice signals, in particular for digital dictation machines
US7218491B2 (en) * 2002-12-23 2007-05-15 Intel Corporation Electrostatic discharge protection unit including equalization
DE102004007185B3 (en) * 2004-02-13 2005-06-30 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Predictive coding method for information signals using adaptive prediction algorithm with switching between higher adaption rate and lower prediction accuracy and lower adaption rate and higher prediction accuracy
KR100629997B1 (en) * 2004-02-26 2006-09-27 엘지전자 주식회사 encoding method of audio signal
WO2009023807A1 (en) * 2007-08-15 2009-02-19 Massachusetts Institute Of Technology Speech processing apparatus and method employing feedback
US8519867B2 (en) 2010-12-23 2013-08-27 General Electric Company Method and system for reducing transmitter power consumption while avoiding delay of displayed information

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US2732424A (en) * 1956-01-24 oliver
US3026375A (en) * 1958-05-09 1962-03-20 Bell Telephone Labor Inc Transmission of quantized signals
US3236947A (en) * 1961-12-21 1966-02-22 Ibm Word code generator
US3305854A (en) * 1963-12-19 1967-02-21 Raytheon Co Sampled data system
US3461244A (en) * 1966-08-16 1969-08-12 Bell Telephone Labor Inc Delta modulation system with continuously variable compander

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128825A (en) * 1982-10-20 1984-05-02 Dbx Analog to digital and digital to analog converter

Also Published As

Publication number Publication date
SE351066B (en) 1972-11-13
DE1941336C3 (en) 1979-12-13
JPS5021203B1 (en) 1975-07-21
US3631520A (en) 1971-12-28
FR2016969A1 (en) 1970-05-15
NL176822B (en) 1985-01-02
BE737031A (en) 1970-01-16
DE1941336B2 (en) 1979-04-19
DE1941336A1 (en) 1970-02-26
ES371061A1 (en) 1971-08-01
NL6912534A (en) 1970-02-23
NL176822C (en) 1985-06-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years