JPS5487205A - Noise reducing circuit - Google Patents

Noise reducing circuit

Info

Publication number
JPS5487205A
JPS5487205A JP15490177A JP15490177A JPS5487205A JP S5487205 A JPS5487205 A JP S5487205A JP 15490177 A JP15490177 A JP 15490177A JP 15490177 A JP15490177 A JP 15490177A JP S5487205 A JPS5487205 A JP S5487205A
Authority
JP
Japan
Prior art keywords
range
signals
low range
low
band
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
JP15490177A
Other languages
Japanese (ja)
Other versions
JPS5953607B2 (en
Inventor
Yoshiro Shiroichi
Noriaki Naito
Kenkichi Umeda
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP15490177A priority Critical patent/JPS5953607B2/en
Publication of JPS5487205A publication Critical patent/JPS5487205A/en
Publication of JPS5953607B2 publication Critical patent/JPS5953607B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Noise Elimination (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE: To reduce the breather due to noises under the condition having no deterioration in the sound quality in a high range and no clear noise in a low range by using a preemphasis circuit having different gains for different bands.
CONSTITUTION: One input signal is fed to the preset LPF filter 16 of a preemphasis circuit so that the mid-range band becomes the low range signals which are attenuated more than a low range band. The other input signal is amplified by an ampli fier 17 into high range signals through an HPF 18 so that the resultant high signals are added to the low range signals from the LPF 16 by an adder 19. As a result, the composed output has a higher gain at a middle range than at a low range and has also a higher gain at a high range than the low range so that the frequency characteristics of each band is so adjusted as to have no deterioration in the sound guality in the high range. Thus,it is possible to generate such signals as have their breathers of the noises reduced under the condition having no clear noise in the low range.
COPYRIGHT: (C)1979,JPO&Japio
JP15490177A 1977-12-22 1977-12-22 noise reduction circuit Expired JPS5953607B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15490177A JPS5953607B2 (en) 1977-12-22 1977-12-22 noise reduction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15490177A JPS5953607B2 (en) 1977-12-22 1977-12-22 noise reduction circuit

Publications (2)

Publication Number Publication Date
JPS5487205A true JPS5487205A (en) 1979-07-11
JPS5953607B2 JPS5953607B2 (en) 1984-12-26

Family

ID=15594429

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15490177A Expired JPS5953607B2 (en) 1977-12-22 1977-12-22 noise reduction circuit

Country Status (1)

Country Link
JP (1) JPS5953607B2 (en)

Also Published As

Publication number Publication date
JPS5953607B2 (en) 1984-12-26

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