JPS562766A - Data transfer system - Google Patents
Data transfer systemInfo
- Publication number
- JPS562766A JPS562766A JP7820979A JP7820979A JPS562766A JP S562766 A JPS562766 A JP S562766A JP 7820979 A JP7820979 A JP 7820979A JP 7820979 A JP7820979 A JP 7820979A JP S562766 A JPS562766 A JP S562766A
- Authority
- JP
- Japan
- Prior art keywords
- data
- circuit
- case
- transfer
- held
- 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
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
- H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Information Transfer Systems (AREA)
Abstract
PURPOSE:To improve data transfer efficiency and reduce the occupation time of transfer lines and so on, by compacting and transmitting data in case that data of the same contents is continuous. CONSTITUTION:Data transfer control unit 1 is constituted by four blocks of input data deciding part 100, frequency counting part 200, frequency comparing part 300, and data transmission selecting part 400, and before data transfer, data transfer start line 4 is set to ''1'' and required circuits of deciding part 100 and counting part 200 are initialized. Data given to data input line 2 is held in data holding circuits 101-103, and preceding data held in circuit 102 and the output of circuit 101 are compared with each other by comparing circuit 104, and data is held in circuit 102 in case of agreement between them, but counting part 200 and comparing part 300 are initialized in case of disagreement. Then, in case that data of the same contents is continuous, data is counted by counting part 200, and data on data output line 3 transmitted from selecting part 400 is compacted, thus improving data transmission efficiency and reducing the occupation time of transfer lines and so on.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7820979A JPS5953739B2 (en) | 1979-06-22 | 1979-06-22 | Data transfer method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7820979A JPS5953739B2 (en) | 1979-06-22 | 1979-06-22 | Data transfer method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS562766A true JPS562766A (en) | 1981-01-13 |
JPS5953739B2 JPS5953739B2 (en) | 1984-12-26 |
Family
ID=13655644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7820979A Expired JPS5953739B2 (en) | 1979-06-22 | 1979-06-22 | Data transfer method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5953739B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01125028A (en) * | 1987-02-24 | 1989-05-17 | Hayes Microcomputer Prod Inc | Method and apparatus for compression of compatible data |
JP2008204129A (en) * | 2007-02-20 | 2008-09-04 | Nec Computertechno Ltd | Data transfer apparatus and data transfer method |
-
1979
- 1979-06-22 JP JP7820979A patent/JPS5953739B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01125028A (en) * | 1987-02-24 | 1989-05-17 | Hayes Microcomputer Prod Inc | Method and apparatus for compression of compatible data |
JP2008204129A (en) * | 2007-02-20 | 2008-09-04 | Nec Computertechno Ltd | Data transfer apparatus and data transfer method |
Also Published As
Publication number | Publication date |
---|---|
JPS5953739B2 (en) | 1984-12-26 |
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