JPS5021203B1 - - Google Patents
Info
- Publication number
- JPS5021203B1 JPS5021203B1 JP44065094A JP6509469A JPS5021203B1 JP S5021203 B1 JPS5021203 B1 JP S5021203B1 JP 44065094 A JP44065094 A JP 44065094A JP 6509469 A JP6509469 A JP 6509469A JP S5021203 B1 JPS5021203 B1 JP S5021203B1
- Authority
- JP
- Japan
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75340868A | 1968-08-19 | 1968-08-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5021203B1 true JPS5021203B1 (en) | 1975-07-21 |
Family
ID=25030515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP44065094A Pending JPS5021203B1 (en) | 1968-08-19 | 1969-08-19 |
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) |
Families Citing this family (51)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
GB2128825A (en) * | 1982-10-20 | 1984-05-02 | Dbx | Analog to digital and digital to analog converter |
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 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
1968
- 1968-08-19 US US753408A patent/US3631520A/en not_active Expired - Lifetime
-
1969
- 1969-08-04 BE BE737031D patent/BE737031A/xx not_active IP Right Cessation
- 1969-08-08 SE SE11076/69A patent/SE351066B/xx unknown
- 1969-08-08 ES ES371061A patent/ES371061A1/en not_active Expired
- 1969-08-13 FR FR6927915A patent/FR2016969A1/fr active Pending
- 1969-08-14 DE DE1941336A patent/DE1941336C3/en not_active Expired
- 1969-08-14 GB GB1266929D patent/GB1266929A/en not_active Expired
- 1969-08-18 NL NLAANVRAGE6912534,A patent/NL176822C/en not_active IP Right Cessation
- 1969-08-19 JP JP44065094A patent/JPS5021203B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1941336A1 (en) | 1970-02-26 |
FR2016969A1 (en) | 1970-05-15 |
BE737031A (en) | 1970-01-16 |
NL176822B (en) | 1985-01-02 |
US3631520A (en) | 1971-12-28 |
DE1941336C3 (en) | 1979-12-13 |
ES371061A1 (en) | 1971-08-01 |
DE1941336B2 (en) | 1979-04-19 |
NL6912534A (en) | 1970-02-23 |
SE351066B (en) | 1972-11-13 |
GB1266929A (en) | 1972-03-15 |
NL176822C (en) | 1985-06-03 |
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