JPS5731241A - Code converter - Google Patents

Code converter

Info

Publication number
JPS5731241A
JPS5731241A JP10692780A JP10692780A JPS5731241A JP S5731241 A JPS5731241 A JP S5731241A JP 10692780 A JP10692780 A JP 10692780A JP 10692780 A JP10692780 A JP 10692780A JP S5731241 A JPS5731241 A JP S5731241A
Authority
JP
Japan
Prior art keywords
code
signal
value
unequal length
time series
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.)
Granted
Application number
JP10692780A
Other languages
Japanese (ja)
Other versions
JPH02901B2 (en
Inventor
Kazumoto Iinuma
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10692780A priority Critical patent/JPS5731241A/en
Priority to CA000382940A priority patent/CA1189974A/en
Publication of JPS5731241A publication Critical patent/JPS5731241A/en
Priority to US06/550,946 priority patent/US4534055A/en
Publication of JPH02901B2 publication Critical patent/JPH02901B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/005—Statistical coding, e.g. Huffman, run length coding
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/40—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (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

PURPOSE:To increase the compressing efficiency, by changing the multi-value time series signal having an inclination of occurring frequency into an unequal length code and then coding the value of the signal delivered most frequently among the unequal length code signals with the code showing the duration. CONSTITUTION:The input signal is coded by a DPCM coder 3 and then converted into a multi-value time series signal having an inclination of the occurring frequency and displayed in a binary code to be delivered to a signal line 100. This output is applied to a timing control circuit 3, and a code showing the run length on the time series of the value of the highest using frequency is obtained by the 2nd code generator 4. Then an unequal length code showing the level of the multi-value signal is obtained by the 1st coder 5. The codes supplied from the coders 4 and 5 are integrated by a multiplexer. This integrated code is converted into a parallel l-bit data through an unequal length code array converting circuit 7 to be stored in a memory 8 after rearranging the unequal length codes in the order of generation.
JP10692780A 1980-08-04 1980-08-04 Code converter Granted JPS5731241A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10692780A JPS5731241A (en) 1980-08-04 1980-08-04 Code converter
CA000382940A CA1189974A (en) 1980-08-04 1981-07-31 Code conversion system
US06/550,946 US4534055A (en) 1980-08-04 1983-11-14 Code conversion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10692780A JPS5731241A (en) 1980-08-04 1980-08-04 Code converter

Publications (2)

Publication Number Publication Date
JPS5731241A true JPS5731241A (en) 1982-02-19
JPH02901B2 JPH02901B2 (en) 1990-01-09

Family

ID=14446036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10692780A Granted JPS5731241A (en) 1980-08-04 1980-08-04 Code converter

Country Status (1)

Country Link
JP (1) JPS5731241A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100875A (en) * 1983-11-02 1985-06-04 Fujitsu Ltd Transmitter of still picture

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558673A (en) * 1978-10-26 1980-05-01 Oki Electric Ind Co Ltd Signal transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558673A (en) * 1978-10-26 1980-05-01 Oki Electric Ind Co Ltd Signal transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100875A (en) * 1983-11-02 1985-06-04 Fujitsu Ltd Transmitter of still picture

Also Published As

Publication number Publication date
JPH02901B2 (en) 1990-01-09

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