JPS6474881A - Recording and reproducing method - Google Patents
Recording and reproducing methodInfo
- Publication number
- JPS6474881A JPS6474881A JP62232970A JP23297087A JPS6474881A JP S6474881 A JPS6474881 A JP S6474881A JP 62232970 A JP62232970 A JP 62232970A JP 23297087 A JP23297087 A JP 23297087A JP S6474881 A JPS6474881 A JP S6474881A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- output
- video signal
- level
- inputted
- 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 execute the faithful reproducing of a part in which the amplitude of a video signal is small by amplifying an analog signal, which is obtained by a gain to correspond to an amplifying gain at a digitalizing in each prescribed section and equalizing the peak level of an input video signal to the maximum level of the input level range of an A/D converter. CONSTITUTION:The input video signal is inputted through an LPF 1 to analog switches 16-19, which are controlled by a system control circuit 20 of a variable resistance attenuator 15, and the output of the attenuator 15 is inputted through an amplifier 4 and a clamp 5 to an A/D converter 6. The peak level of the output of this converter 6 is detected by a peak level detecting circuit 21, added to a memory 22 and temporarily held and the switches 16-19 are controlled based on the control of the circuit 20. Then, the output of the converter 6 is stored to a memory 7 and the output is D/A converted and inputted to a variable resistance attenuator 25. Then, the peak level of the input video signal is equalized to the maximum level of the input level range of the converter 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232970A JPS6474881A (en) | 1987-09-17 | 1987-09-17 | Recording and reproducing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232970A JPS6474881A (en) | 1987-09-17 | 1987-09-17 | Recording and reproducing method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6474881A true JPS6474881A (en) | 1989-03-20 |
Family
ID=16947735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62232970A Pending JPS6474881A (en) | 1987-09-17 | 1987-09-17 | Recording and reproducing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6474881A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07170306A (en) * | 1993-12-15 | 1995-07-04 | Nec Corp | Demodulator |
JP2008269368A (en) * | 2007-04-21 | 2008-11-06 | Nidec Sankyo Corp | Medium processing device |
-
1987
- 1987-09-17 JP JP62232970A patent/JPS6474881A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07170306A (en) * | 1993-12-15 | 1995-07-04 | Nec Corp | Demodulator |
JP2008269368A (en) * | 2007-04-21 | 2008-11-06 | Nidec Sankyo Corp | Medium processing device |
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