JPS5625853A - Information transmission system - Google Patents

Information transmission system

Info

Publication number
JPS5625853A
JPS5625853A JP10204779A JP10204779A JPS5625853A JP S5625853 A JPS5625853 A JP S5625853A JP 10204779 A JP10204779 A JP 10204779A JP 10204779 A JP10204779 A JP 10204779A JP S5625853 A JPS5625853 A JP S5625853A
Authority
JP
Japan
Prior art keywords
signal
important
information
normal
bit
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
JP10204779A
Other languages
Japanese (ja)
Inventor
Shinsuke Ishikawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP10204779A priority Critical patent/JPS5625853A/en
Publication of JPS5625853A publication Critical patent/JPS5625853A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/007—Unequal error protection
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/35—Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Theoretical Computer Science (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To enable the transmission of efficient information, by dividing the information signal such as voice and picture into important bit group and not impotant one, and making different the error control system for each group. CONSTITUTION:The information signal frame 4 is constituted with the frame synchronizing signal 1, important bit signal 2, and normal bit signal 3. The important bit signal 2 indicates the process of band compression and important signal especially at the decoding and coded by using the coding system possible for error correction with circulating code. The normal signal 3 is the normal bit signal in band compression, and since the error in this signal more or less does not give important effect on the voice quality and picture quality of decoded signal, coding is made possible with comparatively simple error control system. This invension system has the advantages possible for the transmission of information with high quality as a whole, even with comparatively small provision of redundancy.
JP10204779A 1979-08-09 1979-08-09 Information transmission system Pending JPS5625853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10204779A JPS5625853A (en) 1979-08-09 1979-08-09 Information transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10204779A JPS5625853A (en) 1979-08-09 1979-08-09 Information transmission system

Publications (1)

Publication Number Publication Date
JPS5625853A true JPS5625853A (en) 1981-03-12

Family

ID=14316847

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10204779A Pending JPS5625853A (en) 1979-08-09 1979-08-09 Information transmission system

Country Status (1)

Country Link
JP (1) JPS5625853A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560725A1 (en) * 1984-03-02 1985-09-06 Thomson Csf METHOD AND DEVICE FOR PROTECTION AGAINST ERRORS ADAPTED TO THE TRANSMISSION OF DARK DIGITAL DATA
US4700363A (en) * 1984-06-09 1987-10-13 Devon County Council Data communication method and apparatus
JPH05218978A (en) * 1991-09-03 1993-08-27 American Teleph & Telegr Co <Att> Method and device for processing signal
EP0597511A2 (en) * 1992-10-09 1994-05-18 Koninklijke Philips Electronics N.V. Method of correcting errors and erasures in digital information, and device suitable for carrying out the method
US5517511A (en) * 1992-11-30 1996-05-14 Digital Voice Systems, Inc. Digital transmission of acoustic signals over a noisy communication channel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2560725A1 (en) * 1984-03-02 1985-09-06 Thomson Csf METHOD AND DEVICE FOR PROTECTION AGAINST ERRORS ADAPTED TO THE TRANSMISSION OF DARK DIGITAL DATA
US4700363A (en) * 1984-06-09 1987-10-13 Devon County Council Data communication method and apparatus
JPH05218978A (en) * 1991-09-03 1993-08-27 American Teleph & Telegr Co <Att> Method and device for processing signal
EP0597511A2 (en) * 1992-10-09 1994-05-18 Koninklijke Philips Electronics N.V. Method of correcting errors and erasures in digital information, and device suitable for carrying out the method
US5517511A (en) * 1992-11-30 1996-05-14 Digital Voice Systems, Inc. Digital transmission of acoustic signals over a noisy communication channel

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