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JPS57147346A - Forecasting and encoding system - Google Patents

Forecasting and encoding system

Info

Publication number
JPS57147346A
JPS57147346A JP56032889A JP3288981A JPS57147346A JP S57147346 A JPS57147346 A JP S57147346A JP 56032889 A JP56032889 A JP 56032889A JP 3288981 A JP3288981 A JP 3288981A JP S57147346 A JPS57147346 A JP S57147346A
Authority
JP
Japan
Prior art keywords
level
forecasting
signal
less
levels
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.)
Granted
Application number
JP56032889A
Other languages
Japanese (ja)
Other versions
JPS6247010B2 (en
Inventor
Fumitaka Ono
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 JP56032889A priority Critical patent/JPS57147346A/en
Publication of JPS57147346A publication Critical patent/JPS57147346A/en
Publication of JPS6247010B2 publication Critical patent/JPS6247010B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

PURPOSE:To shorten a transmission time by efficiently encoding an order signal while considering the order of forecasting levels, by a system which forecasts and encodes a digital signal having level values by a preceding digital signal. CONSTITUTION:A signal level at a reference point is used to forecast the 1st forecasting level at an aimed point. Then, Fig. A shows that while succeeding levels following the 1st one are considered to become higher and higher as their level difference from the 1st forecasting level are less and less, forecasting levels are rearranged with regard to eight level values. Further, Fig. B shows rewritten levels indicating an order signal to the signal level at the aimed point. When the order signal in Fig. B is encoded and transmitted, it is estimated that as the numeral of the order signal is less and less, its probability of appearance is higher and higher without reference to the 1st forecasting level, so mean signal length is shortened, thereby shortening a transmission time.
JP56032889A 1981-03-06 1981-03-06 Forecasting and encoding system Granted JPS57147346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56032889A JPS57147346A (en) 1981-03-06 1981-03-06 Forecasting and encoding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56032889A JPS57147346A (en) 1981-03-06 1981-03-06 Forecasting and encoding system

Publications (2)

Publication Number Publication Date
JPS57147346A true JPS57147346A (en) 1982-09-11
JPS6247010B2 JPS6247010B2 (en) 1987-10-06

Family

ID=12371442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56032889A Granted JPS57147346A (en) 1981-03-06 1981-03-06 Forecasting and encoding system

Country Status (1)

Country Link
JP (1) JPS57147346A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59143485A (en) * 1983-02-04 1984-08-17 Mitsubishi Electric Corp Encoding method of ntsc composite color signal
US6188793B1 (en) 1996-03-19 2001-02-13 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method and decoding method
US6636641B1 (en) 1996-03-19 2003-10-21 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method and decoding method
US6744925B2 (en) 1996-03-19 2004-06-01 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method, and decoding method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59143485A (en) * 1983-02-04 1984-08-17 Mitsubishi Electric Corp Encoding method of ntsc composite color signal
JPH0160990B2 (en) * 1983-02-04 1989-12-26 Mitsubishi Electric Corp
US6188793B1 (en) 1996-03-19 2001-02-13 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method and decoding method
US6636641B1 (en) 1996-03-19 2003-10-21 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method and decoding method
US6744925B2 (en) 1996-03-19 2004-06-01 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method, and decoding method
US6754393B2 (en) 1996-03-19 2004-06-22 Mitsubishi Denki Kabushiki Kaisha Encoding apparatus, decoding apparatus, encoding method, and decoding method

Also Published As

Publication number Publication date
JPS6247010B2 (en) 1987-10-06

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