JPS5616375A - Still picture transmitting device - Google Patents

Still picture transmitting device

Info

Publication number
JPS5616375A
JPS5616375A JP9238279A JP9238279A JPS5616375A JP S5616375 A JPS5616375 A JP S5616375A JP 9238279 A JP9238279 A JP 9238279A JP 9238279 A JP9238279 A JP 9238279A JP S5616375 A JPS5616375 A JP S5616375A
Authority
JP
Japan
Prior art keywords
coder
picture frame
memory
picture
signal
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
JP9238279A
Other languages
Japanese (ja)
Inventor
Hatsuki Kawamata
Seiichiro Shigaki
Tomoji Inoue
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
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9238279A priority Critical patent/JPS5616375A/en
Publication of JPS5616375A publication Critical patent/JPS5616375A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To ensure the transmission of the next picture frame after a quick transmission of one picture frame in the case of the simple picture frame as well as secure a transmission with decrement of a small number of frames in the case of the complicated picture frame respectively, by using the input adaptive band compression coder of the fixed parameter or the like. CONSTITUTION:Input adaptive compression coder 21 such as the run length coder, differential coder DPCM and the like is provided. Coding device 2 consists of A/D converter 25 which converts the analog picture signal supplied from the picture signal generator 1 of the TV camera or the like into the digital signal, coder 21 which codes the digital code sent from converter 25, memory 22 which stores the coded signal from coder 21, and control circuit 24 which gives the control to the code writing into memory 22 each. Circuit 24 delivers control signal 20 when the amount of contents of memory 22 is less than the prescribed value in order to write the picture signals equivalent to one picture frame and sent from genertor 1 immediately after into memory 22 via coder 21. And in case the number of signals equivalent to one picture frame after compression is less than the number of signals to be sent to the transmission line during the vertical synchronizing signal intervals, the FF is set again to perform a continuous writing of signals.
JP9238279A 1979-07-19 1979-07-19 Still picture transmitting device Pending JPS5616375A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9238279A JPS5616375A (en) 1979-07-19 1979-07-19 Still picture transmitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9238279A JPS5616375A (en) 1979-07-19 1979-07-19 Still picture transmitting device

Publications (1)

Publication Number Publication Date
JPS5616375A true JPS5616375A (en) 1981-02-17

Family

ID=14052865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9238279A Pending JPS5616375A (en) 1979-07-19 1979-07-19 Still picture transmitting device

Country Status (1)

Country Link
JP (1) JPS5616375A (en)

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