JPS5731243A - Coder - Google Patents

Coder

Info

Publication number
JPS5731243A
JPS5731243A JP10693080A JP10693080A JPS5731243A JP S5731243 A JPS5731243 A JP S5731243A JP 10693080 A JP10693080 A JP 10693080A JP 10693080 A JP10693080 A JP 10693080A JP S5731243 A JPS5731243 A JP S5731243A
Authority
JP
Japan
Prior art keywords
signal
code
showing
plus
run
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
JP10693080A
Other languages
Japanese (ja)
Other versions
JPH022336B2 (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 JP10693080A priority Critical patent/JPS5731243A/en
Priority to CA000382940A priority patent/CA1189974A/en
Publication of JPS5731243A publication Critical patent/JPS5731243A/en
Priority to US06/550,946 priority patent/US4534055A/en
Publication of JPH022336B2 publication Critical patent/JPH022336B2/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

Abstract

PURPOSE:To increase the compressing efficiency of a multi-value time series signal, by changing the value of the signal delivered most frequently into an unequal length code in terms of the run length and changing other signal values into the unequal length codes in terms of the level respectively. CONSTITUTION:The multi-vlaue time series signal is divided by a synchronous signal and through a timing control circuit to be applied to the 1st and 2nd coders 5 and 4. A code R of an unequal length showing the run length of the value of the signal delivered most frequently plus a code showing the run length of the code R are obtained by the 2nd coder 4; while a code V of an unequal length showing the levels of other signal values plus a code showing the run lenght of the code V are obtained by the 1st coder 5, respectively. A synchronous signal plus the codes R and V are multiplexed through a multiplexer 6, and a code showing the run lenght of each signal is multiplexed to be applied to an unequal length code array converting circuit 7. Thus the display signal showing the effective bits on the parallel data lines plus a signal with the ineffective bits eliminated by the display signal are obtained through the circuit 7.
JP10693080A 1980-08-04 1980-08-04 Coder Granted JPS5731243A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10693080A JPS5731243A (en) 1980-08-04 1980-08-04 Coder
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
JP10693080A JPS5731243A (en) 1980-08-04 1980-08-04 Coder

Publications (2)

Publication Number Publication Date
JPS5731243A true JPS5731243A (en) 1982-02-19
JPH022336B2 JPH022336B2 (en) 1990-01-17

Family

ID=14446113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10693080A Granted JPS5731243A (en) 1980-08-04 1980-08-04 Coder

Country Status (1)

Country Link
JP (1) JPS5731243A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62116089A (en) * 1985-11-15 1987-05-27 Fujitsu Ltd Blocking entropy encoding system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5730452A (en) * 1980-07-30 1982-02-18 Fujitsu Ltd Variable-length code transmission system
JPS5731242A (en) * 1980-08-04 1982-02-19 Nec Corp Coder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5730452A (en) * 1980-07-30 1982-02-18 Fujitsu Ltd Variable-length code transmission system
JPS5731242A (en) * 1980-08-04 1982-02-19 Nec Corp Coder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62116089A (en) * 1985-11-15 1987-05-27 Fujitsu Ltd Blocking entropy encoding system

Also Published As

Publication number Publication date
JPH022336B2 (en) 1990-01-17

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