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JPS5730452A - Variable-length code transmission system - Google Patents

Variable-length code transmission system

Info

Publication number
JPS5730452A
JPS5730452A JP10458880A JP10458880A JPS5730452A JP S5730452 A JPS5730452 A JP S5730452A JP 10458880 A JP10458880 A JP 10458880A JP 10458880 A JP10458880 A JP 10458880A JP S5730452 A JPS5730452 A JP S5730452A
Authority
JP
Japan
Prior art keywords
variable
length
code
length code
register
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
JP10458880A
Other languages
Japanese (ja)
Inventor
Kengo Fujita
Kiichi Matsuda
Makoto Hiraoka
Toshihiro Honma
Yutaka Fukuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10458880A priority Critical patent/JPS5730452A/en
Publication of JPS5730452A publication Critical patent/JPS5730452A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H03M7/42—Conversion to or from variable length codes, e.g. Shannon-Fano code, Huffman code, Morse code using table look-up for the coding or decoding process, e.g. using read-only memory

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To save hardware greatly by outputting variable-length codes, word by word, by employing a code converting means of converting fixed-length codes into variable-length ones and also outputting the variable-length codes in a shifted state. CONSTITUTION:When a fixed-length code is inputted, a code converting circuit 11 outputs a variable-length code corresponding to the code, and an output signal shifted by the extent which corresponds to a shift signal from a control circuit 12 is inputted to an eight-bit shift register 7 and a selecting circuit 8. The 1st variable- length code is not shifted, and an effective-bit set register 9 inputs one bit of the variable-length code, for example; when the next fixed-length code is inputted, a shift-1 signal is supplied to a shift control input, so the circuit 11 outputs the variable-length code shifted by one bit to input an effective bit to the register 9. Thus, the shift control varies successively to effective bits to the register 9 eight times, to that an output is generated through an output register 10.
JP10458880A 1980-07-30 1980-07-30 Variable-length code transmission system Pending JPS5730452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10458880A JPS5730452A (en) 1980-07-30 1980-07-30 Variable-length code transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10458880A JPS5730452A (en) 1980-07-30 1980-07-30 Variable-length code transmission system

Publications (1)

Publication Number Publication Date
JPS5730452A true JPS5730452A (en) 1982-02-18

Family

ID=14384588

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10458880A Pending JPS5730452A (en) 1980-07-30 1980-07-30 Variable-length code transmission system

Country Status (1)

Country Link
JP (1) JPS5730452A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5731242A (en) * 1980-08-04 1982-02-19 Nec Corp Coder
JPS5731243A (en) * 1980-08-04 1982-02-19 Nec Corp Coder
US4921703A (en) * 1986-09-19 1990-05-01 Nitto Electric Industrial Co., Ltd. Vermin exterminating element and vermin exterminating method using it

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5731242A (en) * 1980-08-04 1982-02-19 Nec Corp Coder
JPS5731243A (en) * 1980-08-04 1982-02-19 Nec Corp Coder
JPH022336B2 (en) * 1980-08-04 1990-01-17 Nippon Electric Co
US4921703A (en) * 1986-09-19 1990-05-01 Nitto Electric Industrial Co., Ltd. Vermin exterminating element and vermin exterminating method using it

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