JPS579128A - Forecast encoding device - Google Patents

Forecast encoding device

Info

Publication number
JPS579128A
JPS579128A JP8336280A JP8336280A JPS579128A JP S579128 A JPS579128 A JP S579128A JP 8336280 A JP8336280 A JP 8336280A JP 8336280 A JP8336280 A JP 8336280A JP S579128 A JPS579128 A JP S579128A
Authority
JP
Japan
Prior art keywords
forecast
signal
adder
transmitted
component
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
JP8336280A
Other languages
Japanese (ja)
Inventor
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 JP8336280A priority Critical patent/JPS579128A/en
Publication of JPS579128A publication Critical patent/JPS579128A/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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To simplify the constitution of device and to prevent the increase in quantized noise due to forecast encoding and decoding, by quantizing a forecast signal operated with higher accuracy than that for quantization of an input signal from a decoded signal, with the same degree of accuracy. CONSTITUTION:A code signal transmitted from a transmission line is transmitted from an input terminal 12 of a forecast encoding device to a code conversion circuit 13, and a quantized forecast error signal corresponding to the respective code is inputted to an adder 14. A decoded signal obtained at the output of the adder 14 is applied to an adder 15, where a signal of a DC component having 0.5 amplitude produced at a DC component generating circuit 16 is added to a decoded signal and transmitted to a forecast device 17, to obtain the forecast signal added with the DC component for the output of the forecast device 17 having the same forecast characteristics as a forecast device 8 of the encoding device. This signal is rounded off for the fractions at a round-off circuit 18 to obtain the forecast signal having the same accuracy for quantization as that for a digital video input signal.
JP8336280A 1980-06-18 1980-06-18 Forecast encoding device Pending JPS579128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8336280A JPS579128A (en) 1980-06-18 1980-06-18 Forecast encoding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8336280A JPS579128A (en) 1980-06-18 1980-06-18 Forecast encoding device

Publications (1)

Publication Number Publication Date
JPS579128A true JPS579128A (en) 1982-01-18

Family

ID=13800309

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8336280A Pending JPS579128A (en) 1980-06-18 1980-06-18 Forecast encoding device

Country Status (1)

Country Link
JP (1) JPS579128A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5157157A (en) * 1974-11-15 1976-05-19 Hitachi Ltd ad henkanhoshiki

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5157157A (en) * 1974-11-15 1976-05-19 Hitachi Ltd ad henkanhoshiki

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