JPS63138786U - - Google Patents
Info
- Publication number
- JPS63138786U JPS63138786U JP3090287U JP3090287U JPS63138786U JP S63138786 U JPS63138786 U JP S63138786U JP 3090287 U JP3090287 U JP 3090287U JP 3090287 U JP3090287 U JP 3090287U JP S63138786 U JPS63138786 U JP S63138786U
- Authority
- JP
- Japan
- Prior art keywords
- emphasis
- video signal
- linear pre
- linear
- changes
- 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
Links
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図乃至第２図は本考案の一実施例を示すも
のであつて、第１図ａはＶＴＲのデイテール・エ
ンフアシス回路における録画側の回路のブロツク
図、第１図ｂはＶＴＲのデイテール・エンフアシ
ス回路における再生側の回路のブロツク図、第２
図ａはノンリニア・プリエンフアシス回路の回路
図、第２図ｂはノンリニア・デイエンフアシス回
路の回路図、第３図及び第４図は従来例を示し、
第３図はＶＴＲのデイテール・エンフアシス回路
における録画側の回路のブロツク図、第４図はノ
ンリニア・プリエンフアシス回路の回路図である
。
１１はノンリニア・プリエンフアシス回路、１
２はＡＧＣ電圧増幅器（ＡＧＣ電圧記録手段）、
１３はメイン・プリエンフアシス回路、１７は固
定ヘツド（ＡＧＣ電圧記録手段）、２０はノンリ
ニア・デイエンフアシス回路、２１はＡＧＣ電圧
増幅器、２２はメイン・デイエンフアシス回路で
ある。
1 and 2 show an embodiment of the present invention, in which FIG. 1a is a block diagram of the recording side circuit in the VTR's detail emphasis circuit, and FIG. 1b is a block diagram of the VTR's detail emphasis circuit. Block diagram of the playback side circuit in the emphasis circuit, Part 2
Figure a shows a circuit diagram of a non-linear pre-emphasis circuit, Figure 2 b shows a circuit diagram of a non-linear de-emphasis circuit, and Figures 3 and 4 show conventional examples.
FIG. 3 is a block diagram of a recording side circuit in a detail emphasis circuit of a VTR, and FIG. 4 is a circuit diagram of a nonlinear pre-emphasis circuit. 11 is a non-linear pre-emphasis circuit, 1
2 is an AGC voltage amplifier (AGC voltage recording means);
13 is a main pre-emphasis circuit, 17 is a fixed head (AGC voltage recording means), 20 is a non-linear de-emphasis circuit, 21 is an AGC voltage amplifier, and 22 is a main de-emphasis circuit.
Claims (1)
に加えてノンリニア・プリエンフアシスをかけて
から磁気テープに記録するＶＴＲのデイテール・
エンフアシス回路において、 録画の際に映像信号が受けるノンリニア・プリ
エンフアシス量を当該映像信号を受信したときの
ＡＧＣ電圧の値により変化させるノンリニア・プ
リエンフアシス回路と、このＡＧＣ電圧の値を当
該映像信号と同時に磁気テープに記録するＡＧＣ
電圧記録手段と、再生の際に映像信号が受けるノ
ンリニア・デイエンフアシス量を磁気テープから
当該映像信号と同時に読み出したＡＧＣ電圧の値
により変化させるノンリニア・デイエンフアシス
回路とを有することを特徴とするＶＴＲのデイテ
ール・エンフアシス回路。[Scope of Utility Model Registration Claim] VTR detail processing that applies non-linear pre-emphasis to the video signal in addition to normal pre-emphasis before recording it on magnetic tape.
The emphasis circuit includes a non-linear pre-emphasis circuit that changes the amount of non-linear pre-emphasis that a video signal receives during recording depending on the value of the AGC voltage when the video signal is received, and a non-linear pre-emphasis circuit that changes the amount of non-linear pre-emphasis that a video signal receives during recording, and a non-linear pre-emphasis circuit that changes the amount of non-linear pre-emphasis that a video signal receives during recording, and a non-linear pre-emphasis circuit that changes the amount of non-linear pre-emphasis that a video signal receives during recording. AGC recorded on tape
A detail of a VTR characterized by having a voltage recording means and a non-linear de-emphasis circuit that changes the amount of non-linear de-emphasis that a video signal receives during playback according to the value of an AGC voltage read out from a magnetic tape at the same time as the video signal. -Emphasis circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3090287U JPH0535667Y2 (en) | 1987-03-03 | 1987-03-03 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3090287U JPH0535667Y2 (en) | 1987-03-03 | 1987-03-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63138786U true JPS63138786U (en) | 1988-09-13 |
| JPH0535667Y2 JPH0535667Y2 (en) | 1993-09-09 |
Family
ID=30836137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3090287U Expired - Lifetime JPH0535667Y2 (en) | 1987-03-03 | 1987-03-03 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535667Y2 (en) |
-
1987
- 1987-03-03 JP JP3090287U patent/JPH0535667Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0535667Y2 (en) | 1993-09-09 |
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