JPS55623A - Transmission system of narrow-band still picture - Google Patents

Transmission system of narrow-band still picture

Info

Publication number
JPS55623A
JPS55623A JP7221578A JP7221578A JPS55623A JP S55623 A JPS55623 A JP S55623A JP 7221578 A JP7221578 A JP 7221578A JP 7221578 A JP7221578 A JP 7221578A JP S55623 A JPS55623 A JP S55623A
Authority
JP
Japan
Prior art keywords
transmission time
control circuit
transmission
signals
grasping
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
JP7221578A
Other languages
Japanese (ja)
Inventor
Harushige Urata
Masaaki Takahashi
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP7221578A priority Critical patent/JPS55623A/en
Publication of JPS55623A publication Critical patent/JPS55623A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To shorten the transmission time by lowering the quality of the picture information of the TV camera and then ensuring the quick and rough grasping.
CONSTITUTION: The spacial reduction is given to the signals sent from the A/D converter via process circuit 3 in transmission device b, and the LSB side is deleted via gradation control circuit 8 to be then supplied to memory 5 via switch circuit 4. Accordingly, the transmission time of one reduced picture frame suffices with the time of reduction ratio of the entire screen transmission time. At reception device d, the low-speed signals are received from device b and then recorded at control circuit 15 in a low speed to be then read out in a high speed. The signals read out perform D/A conversion 13 under the control of gradation control circuit 16. In such way, the transmission is possible in the transmission time of the screen reduction ratio with lowering of the picture quality, but ensuring the rough grasping satisfactorily.
COPYRIGHT: (C)1980,JPO&Japio
JP7221578A 1978-06-16 1978-06-16 Transmission system of narrow-band still picture Pending JPS55623A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7221578A JPS55623A (en) 1978-06-16 1978-06-16 Transmission system of narrow-band still picture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7221578A JPS55623A (en) 1978-06-16 1978-06-16 Transmission system of narrow-band still picture

Publications (1)

Publication Number Publication Date
JPS55623A true JPS55623A (en) 1980-01-07

Family

ID=13482789

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7221578A Pending JPS55623A (en) 1978-06-16 1978-06-16 Transmission system of narrow-band still picture

Country Status (1)

Country Link
JP (1) JPS55623A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5940036A (en) * 1982-08-27 1984-03-05 Nhk Spring Co Ltd Frictional vibration damping device
JPS602075U (en) * 1983-06-20 1985-01-09 トキコ株式会社 mechanical snaps
JPS60196086A (en) * 1984-03-19 1985-10-04 Nippon Telegr & Teleph Corp <Ntt> Communication method of narrow band moving picture

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5940036A (en) * 1982-08-27 1984-03-05 Nhk Spring Co Ltd Frictional vibration damping device
JPS6331012B2 (en) * 1982-08-27 1988-06-22 Nhk Spring Co Ltd
JPS602075U (en) * 1983-06-20 1985-01-09 トキコ株式会社 mechanical snaps
JPS60196086A (en) * 1984-03-19 1985-10-04 Nippon Telegr & Teleph Corp <Ntt> Communication method of narrow band moving picture

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