JPS57150289A - Static picture transmitting device - Google Patents

Static picture transmitting device

Info

Publication number
JPS57150289A
JPS57150289A JP3488381A JP3488381A JPS57150289A JP S57150289 A JPS57150289 A JP S57150289A JP 3488381 A JP3488381 A JP 3488381A JP 3488381 A JP3488381 A JP 3488381A JP S57150289 A JPS57150289 A JP S57150289A
Authority
JP
Japan
Prior art keywords
unequal length
signal
equal length
encoder
unequal
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
JP3488381A
Other languages
Japanese (ja)
Inventor
Kazumi Yuasa
Noriaki Sonoda
Hisaaki Azumaguchi
Norio Suzuki
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 JP3488381A priority Critical patent/JPS57150289A/en
Publication of JPS57150289A publication Critical patent/JPS57150289A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation

Landscapes

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

Abstract

PURPOSE:To increase a transmission speed, and to finish propagation of an error by 1H even in case when a transmission error has occurred, by using an unequal length code. CONSTITUTION:A readout data is differentially encoded by a higher order forecasting differential encoder HODPCM102. This HODPCM operates so that forecasting is started from a constant level, by resetting a circuit to a sink chip level every 1H by a control signal from a transmission controller 105. An equal length encoder 103 converts the differentially encoded signal to an equal length code whose 1 picture element consists of 4 bits, and an unequal length encoder 104 converts said signal to an unequal length code of 1-8 bits in accordance with generation frequency. Whether a signal to be transmitted is set to equal length or unequal length is switched by a switch 105, and after that, it is sent to a transmission controller 106, information for discriminating equal length or unequal length is inserted into the first data of 1 field, also information for discriminating an end of every 1H is inserted, and is sent out as a serial data to the circuit.
JP3488381A 1981-03-11 1981-03-11 Static picture transmitting device Pending JPS57150289A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3488381A JPS57150289A (en) 1981-03-11 1981-03-11 Static picture transmitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3488381A JPS57150289A (en) 1981-03-11 1981-03-11 Static picture transmitting device

Publications (1)

Publication Number Publication Date
JPS57150289A true JPS57150289A (en) 1982-09-17

Family

ID=12426532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3488381A Pending JPS57150289A (en) 1981-03-11 1981-03-11 Static picture transmitting device

Country Status (1)

Country Link
JP (1) JPS57150289A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5397322A (en) * 1977-02-07 1978-08-25 Hitachi Ltd Encoding system
JPS556952A (en) * 1978-06-30 1980-01-18 Fujitsu Ltd Adaptive semivariable length coding system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5397322A (en) * 1977-02-07 1978-08-25 Hitachi Ltd Encoding system
JPS556952A (en) * 1978-06-30 1980-01-18 Fujitsu Ltd Adaptive semivariable length coding system

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