JPS5744384A - Adaptive quantization and encoding system for television signal - Google Patents

Adaptive quantization and encoding system for television signal

Info

Publication number
JPS5744384A
JPS5744384A JP55120406A JP12040680A JPS5744384A JP S5744384 A JPS5744384 A JP S5744384A JP 55120406 A JP55120406 A JP 55120406A JP 12040680 A JP12040680 A JP 12040680A JP S5744384 A JPS5744384 A JP S5744384A
Authority
JP
Japan
Prior art keywords
field
forecasting
forecasted
picture elements
television signal
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
JP55120406A
Other languages
Japanese (ja)
Other versions
JPS6340393B2 (en
Inventor
Yoshinori Hatori
Hitoshi Murakami
Hideo Yamamoto
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP55120406A priority Critical patent/JPS5744384A/en
Publication of JPS5744384A publication Critical patent/JPS5744384A/en
Publication of JPS6340393B2 publication Critical patent/JPS6340393B2/ja
Granted 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)
  • Color Television Systems (AREA)

Abstract

PURPOSE:To reduce the volume of transmitted information by performing in-field forecasting and field-to-field forecasting, finding differences between a real value and both forecasted values, and determining the number of bits of differential quantization according to a maximum error within the range of one eight-picture-element block. CONSTITUTION:A one-field television signal is stored in a storage part 5, and a television signal of >=8 picture elements is stored in auxiliary storage parts 6 and 7. A control part 8 compares the forecasting outputs of an in-field forecasting part 1 and a field-to-field forecasting part 2 with a real vaue to select a larger forecasted error absolute value. When the largest value is greater than a threshold value TH on the completion of one block of eight picture elements, quantization into 27 levels is carried out. When it is >=1/2TH, quantized into three levels, and when it is >=1/4TH, even-numbered picture elements are quantized into one or two bits and odd-numbered picture elements are assumed to have no forecasted error. When it is <=1/4TH, all forecasted errors are assured to be 0s, and transmission is not executed.
JP55120406A 1980-08-29 1980-08-29 Adaptive quantization and encoding system for television signal Granted JPS5744384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55120406A JPS5744384A (en) 1980-08-29 1980-08-29 Adaptive quantization and encoding system for television signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55120406A JPS5744384A (en) 1980-08-29 1980-08-29 Adaptive quantization and encoding system for television signal

Publications (2)

Publication Number Publication Date
JPS5744384A true JPS5744384A (en) 1982-03-12
JPS6340393B2 JPS6340393B2 (en) 1988-08-10

Family

ID=14785420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55120406A Granted JPS5744384A (en) 1980-08-29 1980-08-29 Adaptive quantization and encoding system for television signal

Country Status (1)

Country Link
JP (1) JPS5744384A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5986390A (en) * 1982-11-08 1984-05-18 Victor Co Of Japan Ltd Digital data transmission system
EP0267581A2 (en) * 1986-11-10 1988-05-18 Kokusai Denshin Denwa Co., Ltd Moving image signal coding system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5986390A (en) * 1982-11-08 1984-05-18 Victor Co Of Japan Ltd Digital data transmission system
EP0267581A2 (en) * 1986-11-10 1988-05-18 Kokusai Denshin Denwa Co., Ltd Moving image signal coding system

Also Published As

Publication number Publication date
JPS6340393B2 (en) 1988-08-10

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