JPS5479513A - Video playback equipment - Google Patents
Video playback equipmentInfo
- 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
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
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) |
-
1977
- 1977-12-07 JP JP14836977A patent/JPS5479513A/en active Pending
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