JPS5797243A - Dpcm signal transmitting system - Google Patents

Dpcm signal transmitting system

Info

Publication number
JPS5797243A
JPS5797243A JP17361580A JP17361580A JPS5797243A JP S5797243 A JPS5797243 A JP S5797243A JP 17361580 A JP17361580 A JP 17361580A JP 17361580 A JP17361580 A JP 17361580A JP S5797243 A JPS5797243 A JP S5797243A
Authority
JP
Japan
Prior art keywords
video data
line
equivalent
signal
finished
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
JP17361580A
Other languages
Japanese (ja)
Inventor
Hiroshi Yoshioka
Tokuya Fukuda
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP17361580A priority Critical patent/JPS5797243A/en
Publication of JPS5797243A publication Critical patent/JPS5797243A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To detect code error produced at transmission lines surely with less redundancy, by transmitting a local demodulation signal as an error detection signal. CONSTITUTION:A DPCM coder 3 consists of a subtractor 31 to which a video data equivalent to one line from an A-D converter 2 is applied as video data for one block's share, a forecasting device 32, a nonlinear compressor 33, an adder 34, and a code converter 35. A local demodulation signal from the adder 34 is applied to a delay circuit 5 equivalent to one sample, the output and that of the code converter 35 are applied to an additional circuit 4, a signal from the delay circuit 5 is fetched when the video data equivalent to one line is finished, and it is added to the finished part of the video data equivalent to one block for transmission. At the transmission side, the finished value of one line in the demodulation output of a video data and the added value are compared for the detection of error.
JP17361580A 1980-12-09 1980-12-09 Dpcm signal transmitting system Pending JPS5797243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17361580A JPS5797243A (en) 1980-12-09 1980-12-09 Dpcm signal transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17361580A JPS5797243A (en) 1980-12-09 1980-12-09 Dpcm signal transmitting system

Publications (1)

Publication Number Publication Date
JPS5797243A true JPS5797243A (en) 1982-06-16

Family

ID=15963889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17361580A Pending JPS5797243A (en) 1980-12-09 1980-12-09 Dpcm signal transmitting system

Country Status (1)

Country Link
JP (1) JPS5797243A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6024797A (en) * 1983-07-21 1985-02-07 Nec Corp Code error detection method
JPS6029068A (en) * 1983-06-16 1985-02-14 Nec Corp Transmission error detection system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6029068A (en) * 1983-06-16 1985-02-14 Nec Corp Transmission error detection system
JPS6024797A (en) * 1983-07-21 1985-02-07 Nec Corp Code error detection method

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