JPS5685177A - Picture data expanding device - Google Patents

Picture data expanding device

Info

Publication number
JPS5685177A
JPS5685177A JP16326579A JP16326579A JPS5685177A JP S5685177 A JPS5685177 A JP S5685177A JP 16326579 A JP16326579 A JP 16326579A JP 16326579 A JP16326579 A JP 16326579A JP S5685177 A JPS5685177 A JP S5685177A
Authority
JP
Japan
Prior art keywords
expansion
data
computer
control
compression data
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
JP16326579A
Other languages
Japanese (ja)
Inventor
Takao Omachi
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 JP16326579A priority Critical patent/JPS5685177A/en
Publication of JPS5685177A publication Critical patent/JPS5685177A/en
Pending legal-status Critical Current

Links

Landscapes

  • Image Processing (AREA)

Abstract

PURPOSE: To realize a high-speed expansion process within a system comprising mainly the computers, by receiving the compression data along with the control word from the computers connected directly to each other via the bus and then returning the compression data to the computer after storing it as an extension data.
CONSTITUTION: The control part 26 of an expanding device receives previously the transfer word number of the compression data to the input buffer part 23 from the side of the computer in the form of the control word and via the computer bus 1 and the drive receiving circuit 2. This word number is used for the control of the data number when the compression data is transferred to the part 23 and at the same time sent to the expansion control part 28 which controls the operation of the expansion part 24 to be used for the end detection of the expansion process. Thus a control is given to the transfer of the picture element data after an expansion is carried out to the computer memory from the output buffer part 25. For the computer, the compression data is transferred to the DMA from the memoryjust by sending the transfer start command of both the compression data and the picture element data and then returned after an expansion. As a result, an easy and high- speed process is possible for expansion of the picture data like a use of the subroutine in terms of the sofrtware.
COPYRIGHT: (C)1981,JPO&Japio
JP16326579A 1979-12-14 1979-12-14 Picture data expanding device Pending JPS5685177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16326579A JPS5685177A (en) 1979-12-14 1979-12-14 Picture data expanding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16326579A JPS5685177A (en) 1979-12-14 1979-12-14 Picture data expanding device

Publications (1)

Publication Number Publication Date
JPS5685177A true JPS5685177A (en) 1981-07-11

Family

ID=15770512

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16326579A Pending JPS5685177A (en) 1979-12-14 1979-12-14 Picture data expanding device

Country Status (1)

Country Link
JP (1) JPS5685177A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62219080A (en) * 1986-03-19 1987-09-26 Matsushita Electric Ind Co Ltd Picture data converter
JPH02193316A (en) * 1989-01-20 1990-07-31 Matsushita Electric Ind Co Ltd Optical disk

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099238A (en) * 1973-12-28 1975-08-06

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099238A (en) * 1973-12-28 1975-08-06

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62219080A (en) * 1986-03-19 1987-09-26 Matsushita Electric Ind Co Ltd Picture data converter
JPH02193316A (en) * 1989-01-20 1990-07-31 Matsushita Electric Ind Co Ltd Optical disk

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