JPS5799885A - Coder between frames - Google Patents

Coder between frames

Info

Publication number
JPS5799885A
JPS5799885A JP17524180A JP17524180A JPS5799885A JP S5799885 A JPS5799885 A JP S5799885A JP 17524180 A JP17524180 A JP 17524180A JP 17524180 A JP17524180 A JP 17524180A JP S5799885 A JPS5799885 A JP S5799885A
Authority
JP
Japan
Prior art keywords
circuit
output
frame
amount
transmitted
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
JP17524180A
Other languages
Japanese (ja)
Inventor
Naoki Takegawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP17524180A priority Critical patent/JPS5799885A/en
Publication of JPS5799885A publication Critical patent/JPS5799885A/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
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE:To prevent the oscillating phenomenon of a buffer memory and to increase the picture quality, by changing the encoding characteristics at each frame in accordance with the amount of coded data precalculated and controlling the amount of data generation. CONSTITUTION:A subtractor 9 subtracts a local decoding signal obtained at an adder 17 from an input terminal 8 and obtains a differential value between frames. This differential value is transmitted to a nonlinear circuit 10, and a signal as a result of an output signal of the circuit 10 added with the local decoding signal is delayed by one frame at a frame delay circuit 13. A calculation circuit 12 for data generating amount calculates the amount of encoded data gen eration for one frame time through the use of an output of the circuit 10 and controls the encoding characteristics. The differential value between the output signal of the circuit 13 and that of a frame delay circuit 15 provided after the circuit 13 is quantized at a quantizing circuit 16 to transmit a quantization representative value and transmission code. The quantization representative value and the output of the circuit 15 are added 17, and the output is transmitted to the subtractor 9 and the circuit 15. The transmission code generated at the circuit 16 is transmitted from a terminal 19.
JP17524180A 1980-12-13 1980-12-13 Coder between frames Pending JPS5799885A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17524180A JPS5799885A (en) 1980-12-13 1980-12-13 Coder between frames

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17524180A JPS5799885A (en) 1980-12-13 1980-12-13 Coder between frames

Publications (1)

Publication Number Publication Date
JPS5799885A true JPS5799885A (en) 1982-06-21

Family

ID=15992723

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17524180A Pending JPS5799885A (en) 1980-12-13 1980-12-13 Coder between frames

Country Status (1)

Country Link
JP (1) JPS5799885A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146685A (en) * 1984-08-13 1986-03-06 Nec Corp Prediction encoder of moving picture signal
JPS63238783A (en) * 1986-11-10 1988-10-04 Kokusai Denshin Denwa Co Ltd <Kdd> Image encoding system
JPS6418382A (en) * 1987-07-14 1989-01-23 Mitsubishi Electric Corp Interframe coding device
US4920426A (en) * 1986-11-10 1990-04-24 Kokusai Denshin Denwa Co., Ltd. Image coding system coding digital image signals by forming a histogram of a coefficient signal sequence to estimate an amount of information

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50122820A (en) * 1974-03-15 1975-09-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50122820A (en) * 1974-03-15 1975-09-26

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6146685A (en) * 1984-08-13 1986-03-06 Nec Corp Prediction encoder of moving picture signal
JPS63238783A (en) * 1986-11-10 1988-10-04 Kokusai Denshin Denwa Co Ltd <Kdd> Image encoding system
US4920426A (en) * 1986-11-10 1990-04-24 Kokusai Denshin Denwa Co., Ltd. Image coding system coding digital image signals by forming a histogram of a coefficient signal sequence to estimate an amount of information
JPS6418382A (en) * 1987-07-14 1989-01-23 Mitsubishi Electric Corp Interframe coding device

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