GB2130055B - A digital speech transmission system - Google Patents

A digital speech transmission system

Info

Publication number
GB2130055B
GB2130055B GB8231697A GB8231697A GB2130055B GB 2130055 B GB2130055 B GB 2130055B GB 8231697 A GB8231697 A GB 8231697A GB 8231697 A GB8231697 A GB 8231697A GB 2130055 B GB2130055 B GB 2130055B
Authority
GB
United Kingdom
Prior art keywords
transmission system
digital speech
speech transmission
digital
transmission
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
GB8231697A
Other versions
GB2130055A (en
Inventor
Laurance Stanley Moye
James Andrew Scott Angus
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.)
STC PLC
Original Assignee
STC PLC
Standard Telephone and Cables PLC
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 STC PLC, Standard Telephone and Cables PLC filed Critical STC PLC
Priority to GB8231697A priority Critical patent/GB2130055B/en
Publication of GB2130055A publication Critical patent/GB2130055A/en
Application granted granted Critical
Publication of GB2130055B publication Critical patent/GB2130055B/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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/04—Differential modulation with several bits, e.g. differential pulse code modulation [DPCM]
    • H03M3/042—Differential modulation with several bits, e.g. differential pulse code modulation [DPCM] with adaptable step size, e.g. adaptive differential pulse code modulation [ADPCM]

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)
GB8231697A 1982-11-05 1982-11-05 A digital speech transmission system Expired GB2130055B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8231697A GB2130055B (en) 1982-11-05 1982-11-05 A digital speech transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8231697A GB2130055B (en) 1982-11-05 1982-11-05 A digital speech transmission system

Publications (2)

Publication Number Publication Date
GB2130055A GB2130055A (en) 1984-05-23
GB2130055B true GB2130055B (en) 1986-08-06

Family

ID=10534079

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8231697A Expired GB2130055B (en) 1982-11-05 1982-11-05 A digital speech transmission system

Country Status (1)

Country Link
GB (1) GB2130055B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE790963A (en) * 1971-11-04 1973-05-07 Int Standard Electric Corp SPEECH TRANSMISSION SYSTEM
GB1356649A (en) * 1971-12-23 1974-06-12 Standard Telephones Cables Ltd Speech transmission system
JPS5550738A (en) * 1978-10-05 1980-04-12 Nec Corp Decoding method of adaptability forecasting type differential pulse code and its unit

Also Published As

Publication number Publication date
GB2130055A (en) 1984-05-23

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20021104