JPS56123182A - Encoding and decoding device for picture signal - Google Patents

Encoding and decoding device for picture signal

Info

Publication number
JPS56123182A
JPS56123182A JP2751380A JP2751380A JPS56123182A JP S56123182 A JPS56123182 A JP S56123182A JP 2751380 A JP2751380 A JP 2751380A JP 2751380 A JP2751380 A JP 2751380A JP S56123182 A JPS56123182 A JP S56123182A
Authority
JP
Japan
Prior art keywords
signal
output
forecasted
value
adder
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
JP2751380A
Other languages
Japanese (ja)
Inventor
Hideto Miyazaki
Junichi Fujino
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2751380A priority Critical patent/JPS56123182A/en
Publication of JPS56123182A publication Critical patent/JPS56123182A/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)

Abstract

PURPOSE:To improve characteristics of response to the sudden change in input signal by discriminating the value of a forecasted error signal and by adding a constant value to a forecasting signal which forecasts the value of the next sampling point when preset discrimination conditions are satisfied. CONSTITUTION:Forecasted error signal Y-P obtained from input signal Y and forecasting signal P is supplied to encoder 3 to obtain encoded signal D. Encoded signal D is sent to quantizer 5 to obtain quantized signal X, which is contrasted with conditions predetermined by discriminating circuit 13 to obtain constant value alpha. Quantized signal X, on the other hand, is passed through delay elements 10 and 11 to obtain reproduced delay signal Z<-2>, which is added by adder 14 to output alpha of discriminating circuit 13. Output Z<-2>' of adder 14 is delayed by one sample at delay element 12 to obtain forecasted signal P. Thus, even if input signal Y varies suddenly, an output signal having superior response characteristics can be obtained.
JP2751380A 1980-03-04 1980-03-04 Encoding and decoding device for picture signal Pending JPS56123182A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2751380A JPS56123182A (en) 1980-03-04 1980-03-04 Encoding and decoding device for picture signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2751380A JPS56123182A (en) 1980-03-04 1980-03-04 Encoding and decoding device for picture signal

Publications (1)

Publication Number Publication Date
JPS56123182A true JPS56123182A (en) 1981-09-28

Family

ID=12223204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2751380A Pending JPS56123182A (en) 1980-03-04 1980-03-04 Encoding and decoding device for picture signal

Country Status (1)

Country Link
JP (1) JPS56123182A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5440507A (en) * 1977-09-06 1979-03-30 Mitsubishi Electric Corp Band compressor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5440507A (en) * 1977-09-06 1979-03-30 Mitsubishi Electric Corp Band compressor

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