JPS6190047U - - Google Patents
Info
- Publication number
- JPS6190047U JPS6190047U JP17639084U JP17639084U JPS6190047U JP S6190047 U JPS6190047 U JP S6190047U JP 17639084 U JP17639084 U JP 17639084U JP 17639084 U JP17639084 U JP 17639084U JP S6190047 U JPS6190047 U JP S6190047U
- Authority
- JP
- Japan
- Prior art keywords
- tracking
- detection
- tracking adjustment
- frequency signal
- frequency
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 230000005236 sound signal Effects 0.000 claims 3
- 230000037430 deletion Effects 0.000 claims 1
- 238000012217 deletion Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Description
図面はこの考案のビデオテープレコーダの実施
例を示し、第１図は１実施例のブロツク図、第２
図ａ〜ｉは第１図の動作説明用のタイミングチヤ
ート、第３図ａ，ｂは第１図の欠落検出パルス、
クロツク信号の波形図、第４図は第１図の動作説
明用のフローチヤート、第５図は他の実施例のブ
ロツク図である。
１０…欠落検出回路、１９，２２…第１、第２
マイクロコンピユータ、２０…発振回路、２３…
トラツキング調整用Ｄ／Ａ変換回路、２４…トラ
ンジスタ。
The drawings show an embodiment of the videotape recorder of this invention, and FIG. 1 is a block diagram of one embodiment, and FIG.
Figures a to i are timing charts for explaining the operation in Figure 1, Figures 3a and b are the missing detection pulses in Figure 1,
FIG. 4 is a flowchart for explaining the operation of FIG. 1, and FIG. 5 is a block diagram of another embodiment. 10... Missing detection circuit, 19, 22... First, second
Microcomputer, 20...Oscillation circuit, 23...
D/A conversion circuit for tracking adjustment, 24...transistor.
Claims (1)
録されたテープと、該テープのビデオトラツクの
再生により得られた再生変調音声信号の搬送波信
号から前記再生変調音声信号の欠落を検出し欠落
検出パルスを出力する欠落検出手段と、入力され
たトラツキング電圧によりトラツキング調整を行
なうトラツキング調整手段と、トラツキング調整
時に前記トラツキング電圧を最小から最大まで可
変するとともに、前記最大から最小までの各レベ
ルに比例した所定周波数範囲の基準周波数信号を
形成する基準周波数信号形成手段と、前記トラツ
キング調整時に所定期間毎の前記欠落検出パルス
の計数をくり返し、計数されたパルス数に比例し
た検出周波数信号を形成する検出周波数信号形成
手段と、前記所定周波数範囲内で前記検出周波数
信号が最低周波数になるときのトラツキング電圧
を検出する最低周波数検出手段と、前記トラツキ
ング調整手段に入力されるトラツキング電圧を前
記最低周波数検出手段により検出されたトラツキ
ング電圧に可変制御するトラツキング電圧可変制
御手段とを備えたビデオテープレコーダ。 A tape on which an FM-modulated audio signal is recorded on a video track, and a carrier wave signal of the reproduced modulated audio signal obtained by reproducing the video track of the tape, detect the omission of the reproduced modulated audio signal, and output a deletion detection pulse. tracking adjustment means that performs tracking adjustment based on input tracking voltage; and tracking adjustment means that varies the tracking voltage from a minimum to a maximum during tracking adjustment, and a predetermined frequency range that is proportional to each level from the maximum to the minimum. a reference frequency signal forming means for forming a reference frequency signal; and a detection frequency signal forming means for repeating counting of the missing detection pulses every predetermined period during the tracking adjustment and forming a detection frequency signal proportional to the number of counted pulses. and lowest frequency detection means for detecting a tracking voltage when the detected frequency signal reaches the lowest frequency within the predetermined frequency range, and a tracking voltage input to the tracking adjustment means detected by the lowest frequency detection means. A video tape recorder comprising tracking voltage variable control means for variable tracking voltage control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17639084U JPS6190047U (en) | 1984-11-20 | 1984-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17639084U JPS6190047U (en) | 1984-11-20 | 1984-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6190047U true JPS6190047U (en) | 1986-06-11 |
Family
ID=30733989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17639084U Pending JPS6190047U (en) | 1984-11-20 | 1984-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6190047U (en) |
-
1984
- 1984-11-20 JP JP17639084U patent/JPS6190047U/ja active Pending
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