JPS5758426A - Dpcm device - Google Patents

Dpcm device

Info

Publication number
JPS5758426A
JPS5758426A JP55134053A JP13405380A JPS5758426A JP S5758426 A JPS5758426 A JP S5758426A JP 55134053 A JP55134053 A JP 55134053A JP 13405380 A JP13405380 A JP 13405380A JP S5758426 A JPS5758426 A JP S5758426A
Authority
JP
Japan
Prior art keywords
value
quantized
quantizer
biased
coded
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
JP55134053A
Other languages
Japanese (ja)
Other versions
JPS6149861B2 (en
Inventor
Yasuhito Okawa
Tsutomu Asabe
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55134053A priority Critical patent/JPS5758426A/en
Publication of JPS5758426A publication Critical patent/JPS5758426A/en
Publication of JPS6149861B2 publication Critical patent/JPS6149861B2/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
    • H04B14/066—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (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 converge a bias potential produced by transmission error to zero, by making a quantized value to -1 when the difference between an input value and an estimated value is zero. CONSTITUTION:An input value xn is converted into a differential value en between said value xn and an estimated value xn obtained based on a coded value Pn. After the value en is quantized at a quantizer 2, it is coded. As the characteristics of the quantizer 2, the quantized value Qn is assigned to -1 when the valueen is 0. Thus, even if the inversion of bits takes place because of trasnmission error and the data is biased as a decoding side, the biased value is reduced and transmitted with a normal level by transmitting Qn=-1.
JP55134053A 1980-09-25 1980-09-25 Dpcm device Granted JPS5758426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55134053A JPS5758426A (en) 1980-09-25 1980-09-25 Dpcm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55134053A JPS5758426A (en) 1980-09-25 1980-09-25 Dpcm device

Publications (2)

Publication Number Publication Date
JPS5758426A true JPS5758426A (en) 1982-04-08
JPS6149861B2 JPS6149861B2 (en) 1986-10-31

Family

ID=15119257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55134053A Granted JPS5758426A (en) 1980-09-25 1980-09-25 Dpcm device

Country Status (1)

Country Link
JP (1) JPS5758426A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107831A (en) * 1984-10-31 1986-05-26 Kowa Co Signal processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107831A (en) * 1984-10-31 1986-05-26 Kowa Co Signal processor

Also Published As

Publication number Publication date
JPS6149861B2 (en) 1986-10-31

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