CA976673A - Narrow band digital speech communication system - Google Patents

Narrow band digital speech communication system

Info

Publication number
CA976673A
CA976673A CA144,836A CA144836A CA976673A CA 976673 A CA976673 A CA 976673A CA 144836 A CA144836 A CA 144836A CA 976673 A CA976673 A CA 976673A
Authority
CA
Canada
Prior art keywords
communication system
narrow band
speech communication
digital speech
band digital
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
CA144,836A
Other languages
English (en)
Other versions
CA144836S (en
Inventor
James G. Dunn
John R. Cowan
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.)
ITT Canada Ltd
Original Assignee
ITT Canada 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 ITT Canada Ltd filed Critical ITT Canada Ltd
Application granted granted Critical
Publication of CA976673A publication Critical patent/CA976673A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
    • H04B14/062—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM]
    • H04B14/064—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using delta modulation or one-bit differential modulation [1DPCM] with adaptive feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
CA144,836A 1971-06-16 1972-06-15 Narrow band digital speech communication system Expired CA976673A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15359171A 1971-06-16 1971-06-16

Publications (1)

Publication Number Publication Date
CA976673A true CA976673A (en) 1975-10-21

Family

ID=22547846

Family Applications (1)

Application Number Title Priority Date Filing Date
CA144,836A Expired CA976673A (en) 1971-06-16 1972-06-15 Narrow band digital speech communication system

Country Status (5)

Country Link
US (1) US3750024A (ref)
CA (1) CA976673A (ref)
DE (1) DE2229149A1 (ref)
FR (1) FR2155206A5 (ref)
GB (1) GB1393743A (ref)

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US3909532A (en) * 1974-03-29 1975-09-30 Bell Telephone Labor Inc Apparatus and method for determining the beginning and the end of a speech utterance
NL7410763A (nl) * 1974-08-12 1976-02-16 Philips Nv Digitaal transmissiestelsel voor het met een lage pulsfrequentie(bit-rate)overdragen van gespreks- signalen en een zender voor toepassing in zulk een stelsel.
US3975587A (en) * 1974-09-13 1976-08-17 International Telephone And Telegraph Corporation Digital vocoder
JPS5737079B2 (ref) * 1974-11-20 1982-08-07
DE2649540A1 (de) * 1975-11-14 1977-05-26 Forrest Shrago Mozer Verfahren und anordnung zur sprachsynthese
US4224678A (en) * 1976-04-05 1980-09-23 Northrop Corporation Method and apparatus for implementing a processor based on the rationalized Haar transform for the purpose of real time compression of video data
US4214125A (en) * 1977-01-21 1980-07-22 Forrest S. Mozer Method and apparatus for speech synthesizing
US4384169A (en) * 1977-01-21 1983-05-17 Forrest S. Mozer Method and apparatus for speech synthesizing
US4354057A (en) * 1980-04-08 1982-10-12 Bell Telephone Laboratories, Incorporated Predictive signal coding with partitioned quantization
USRE32124E (en) * 1980-04-08 1986-04-22 At&T Bell Laboratories Predictive signal coding with partitioned quantization
DE3167257D1 (en) * 1981-02-27 1985-01-03 Ibm Transmission methods and apparatus for implementing the method
GB2102254B (en) * 1981-05-11 1985-08-07 Kokusai Denshin Denwa Co Ltd A speech analysis-synthesis system
JPS6011360B2 (ja) * 1981-12-15 1985-03-25 ケイディディ株式会社 音声符号化方式
US4672670A (en) * 1983-07-26 1987-06-09 Advanced Micro Devices, Inc. Apparatus and methods for coding, decoding, analyzing and synthesizing a signal
NL8302985A (nl) * 1983-08-26 1985-03-18 Philips Nv Multipulse excitatie lineair predictieve spraakcodeerder.
US4546342A (en) * 1983-12-14 1985-10-08 Digital Recording Research Limited Partnership Data compression method and apparatus
US4742543A (en) * 1983-12-22 1988-05-03 Frederiksen Jeffrey E Video transmission system
US4701954A (en) * 1984-03-16 1987-10-20 American Telephone And Telegraph Company, At&T Bell Laboratories Multipulse LPC speech processing arrangement
US4617676A (en) * 1984-09-04 1986-10-14 At&T Bell Laboratories Predictive communication system filtering arrangement
EP0203940A4 (en) * 1984-11-02 1987-04-07 Ma Com Gov Systems RELP VOCODER FOR USE IN DIGITAL SIGNAL PROCESSORS.
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
US5546383A (en) * 1993-09-30 1996-08-13 Cooley; David M. Modularly clustered radiotelephone system
TW321810B (ref) * 1995-10-26 1997-12-01 Sony Co Ltd
US6167134A (en) * 1997-04-22 2000-12-26 Silicon Laboratories, Inc. External resistor and method to minimize power dissipation in DC holding circuitry for a communication system
US6359983B1 (en) 1997-04-22 2002-03-19 Silicon Laboratories, Inc. Digital isolation system with data scrambling
US6137827A (en) 1997-04-22 2000-10-24 Silicon Laboratories, Inc. Isolation system with digital communication across a capacitive barrier
US6516024B1 (en) 1997-04-22 2003-02-04 Silicon Laboratories Inc. Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with low distortion and current limiting
US6307891B1 (en) 1997-04-22 2001-10-23 Silicon Laboratories, Inc. Method and apparatus for freezing a communication link during a disruptive event
US6289070B1 (en) 1997-04-22 2001-09-11 Silicon Laboratories, Inc. Digital isolation system with ADC offset calibration including coarse offset
US6389134B1 (en) 1997-04-22 2002-05-14 Silicon Laboratories, Inc. Call progress monitor circuitry and method for a communication system
US6222922B1 (en) 1997-04-22 2001-04-24 Silicon Laboratories, Inc. Loop current monitor circuitry and method for a communication system
US5870046A (en) 1997-04-22 1999-02-09 Silicon Laboratories Inc. Analog isolation system with digital communication across a capacitive barrier
US6408034B1 (en) 1997-04-22 2002-06-18 Silicon Laboratories, Inc. Framed delta sigma data with unlikely delta sigma data patterns
US6442271B1 (en) 1997-04-22 2002-08-27 Silicon Laboratories, Inc. Digital isolation system with low power mode
US6504864B1 (en) 1997-04-22 2003-01-07 Silicon Laboratories Inc. Digital access arrangement circuitry and method for connecting to phone lines having a second order DC holding circuit
US6167132A (en) * 1997-04-22 2000-12-26 Silicon Laboratories, Inc. Analog successive approximation (SAR) analog-to-digital converter (ADC)
US6442213B1 (en) 1997-04-22 2002-08-27 Silicon Laboratories Inc. Digital isolation system with hybrid circuit in ADC calibration loop
US6144326A (en) 1997-04-22 2000-11-07 Silicon Laboratories, Inc. Digital isolation system with ADC offset calibration
US6498825B1 (en) * 1997-04-22 2002-12-24 Silicon Laboratories Inc. Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting
US6587560B1 (en) * 1997-04-22 2003-07-01 Silicon Laboratories Inc. Low voltage circuits powered by the phone line
US6160885A (en) * 1997-04-22 2000-12-12 Silicon Laboratories, Inc. Caller ID circuit powered through hookswitch devices
US6385235B1 (en) 1997-04-22 2002-05-07 Silicon Laboratories, Inc. Direct digital access arrangement circuitry and method for connecting to phone lines
US6339048B1 (en) * 1999-12-23 2002-01-15 Elementis Specialties, Inc. Oil and oil invert emulsion drilling fluids with improved anti-settling properties
US6456712B1 (en) 1997-04-22 2002-09-24 Silicon Laboratories Inc. Separation of ring detection functions across isolation barrier for minimum power
US6480602B1 (en) 1997-04-22 2002-11-12 Silicon Laboratories, Inc. Ring-detect interface circuitry and method for a communication system
US6104991A (en) * 1998-02-27 2000-08-15 Lucent Technologies, Inc. Speech encoding and decoding system which modifies encoding and decoding characteristics based on an audio signal
US6059268A (en) * 1998-05-06 2000-05-09 Santelli, Jr.; Albert Bumper system for limiting the mobility of a wheeled device
US8005116B2 (en) * 2006-11-16 2011-08-23 Cisco Technology, Inc. System and method for mitigating the effects of bit insertion in a communications environment
US10433075B2 (en) * 2017-09-12 2019-10-01 Whisper.Ai, Inc. Low latency audio enhancement
WO2019084214A1 (en) 2017-10-24 2019-05-02 Whisper.Ai, Inc. AUDIO SEPARATION AND RECOMBINATION FOR INTELLIGIBILITY AND COMFORT

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US3499996A (en) * 1966-12-30 1970-03-10 Octronix Inc Bandwidth compressor and expander
JPS4839505B1 (ref) * 1968-08-06 1973-11-24
US3621150A (en) * 1969-09-17 1971-11-16 Sanders Associates Inc Speech processor for changing voice pitch
US3659052A (en) * 1970-05-21 1972-04-25 Phonplex Corp Multiplex terminal with redundancy reduction

Also Published As

Publication number Publication date
US3750024A (en) 1973-07-31
FR2155206A5 (ref) 1973-05-18
DE2229149A1 (de) 1972-12-28
GB1393743A (en) 1975-05-14

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