JPS5698027A - Digital level compressor - Google Patents

Digital level compressor

Info

Publication number
JPS5698027A
JPS5698027A JP17404879A JP17404879A JPS5698027A JP S5698027 A JPS5698027 A JP S5698027A JP 17404879 A JP17404879 A JP 17404879A JP 17404879 A JP17404879 A JP 17404879A JP S5698027 A JPS5698027 A JP S5698027A
Authority
JP
Japan
Prior art keywords
bits
rank
data
bit
register
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
JP17404879A
Other languages
Japanese (ja)
Inventor
Masatoshi Shinpo
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 JP17404879A priority Critical patent/JPS5698027A/en
Publication of JPS5698027A publication Critical patent/JPS5698027A/en
Pending 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
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth
    • H04B14/048—Non linear compression or expansion

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE:To avoid the digital clipping which is caused by an increment of the bits to be added, by extracting the several higher-rank bits excepting the bits corresponding to the sample data out of the lowest-rank bit among the addition outputs of the binary parallel sample data. CONSTITUTION:In case a carry exists in the 4-bit adder 1, the parallel sampling data is loaded into the shift register 2. The contents of the register 2 is turned by the data heading control turning clock pulse supplied from the clock pulse generating circuit 7 and then shifted so that the carry pulse is used for the highest-rank bit of an array. Then the contents of the register 2 is written into the shift register 3 or 4 and then read out by the clock frequency lower than the writing clock pulse. Then the higher-rank parallel 4 bits excepting the carry pulse are extracted as the serial 4-bit data among the addition outputs of the two input data of 4 bits.
JP17404879A 1979-12-29 1979-12-29 Digital level compressor Pending JPS5698027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17404879A JPS5698027A (en) 1979-12-29 1979-12-29 Digital level compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17404879A JPS5698027A (en) 1979-12-29 1979-12-29 Digital level compressor

Publications (1)

Publication Number Publication Date
JPS5698027A true JPS5698027A (en) 1981-08-07

Family

ID=15971704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17404879A Pending JPS5698027A (en) 1979-12-29 1979-12-29 Digital level compressor

Country Status (1)

Country Link
JP (1) JPS5698027A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63122057A (en) * 1986-11-12 1988-05-26 Hitachi Ltd Recording and reproducing device for digital information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63122057A (en) * 1986-11-12 1988-05-26 Hitachi Ltd Recording and reproducing device for digital information

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