JPS5479513A - Video playback equipment - Google Patents

Video playback equipment

Info

Publication number
JPS5479513A
JPS5479513A JP14836977A JP14836977A JPS5479513A JP S5479513 A JPS5479513 A JP S5479513A JP 14836977 A JP14836977 A JP 14836977A JP 14836977 A JP14836977 A JP 14836977A JP S5479513 A JPS5479513 A JP S5479513A
Authority
JP
Japan
Prior art keywords
noise component
synchronizing signal
output
circuit
tip
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
JP14836977A
Other languages
Japanese (ja)
Inventor
Shinya Okuno
Kazuo Ito
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP14836977A priority Critical patent/JPS5479513A/en
Publication of JPS5479513A publication Critical patent/JPS5479513A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE: To grasp elapse deterioration of the input interface characteristics of a video tape recorder, etc., by extracting a noise component at the tip of a synchronizing signal from the output of a video demodulator and by detecting and displaying the noise component with its DC compoment removed.
CONSTITUTION: The output of video demodulator 3 is led to clamping circuit 4, where the DC level at its synchronous tip is clamped to a fixed value. Then, its output is inputted to clipping circuit 5 to extract the tip part of the synchronizing signal, which is so amplified 6 that the overlapping noise component will not be saturated, and only the overlapping noise component in the synchronizing signal is separated through HPF7. Next, it is supplied via buffer circuit 8 to DC-compenent removing circuit 9, where the DC component is removed, and noises at the synchronous tip part are detected, thereby attaining display M of its level. Consequently, it is made possible to grasp the elapse deterioration of input interface characteristics of a video tape recorder, etc.
COPYRIGHT: (C)1979,JPO&Japio
JP14836977A 1977-12-07 1977-12-07 Video playback equipment Pending JPS5479513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14836977A JPS5479513A (en) 1977-12-07 1977-12-07 Video playback equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14836977A JPS5479513A (en) 1977-12-07 1977-12-07 Video playback equipment

Publications (1)

Publication Number Publication Date
JPS5479513A true JPS5479513A (en) 1979-06-25

Family

ID=15451211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14836977A Pending JPS5479513A (en) 1977-12-07 1977-12-07 Video playback equipment

Country Status (1)

Country Link
JP (1) JPS5479513A (en)

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