JPS6255242U - - Google Patents
Info
- Publication number
- JPS6255242U JPS6255242U JP14591285U JP14591285U JPS6255242U JP S6255242 U JPS6255242 U JP S6255242U JP 14591285 U JP14591285 U JP 14591285U JP 14591285 U JP14591285 U JP 14591285U JP S6255242 U JPS6255242 U JP S6255242U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- beat signal
- beat
- head
- sampling
- 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
- 238000005070 sampling Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000000605 extraction Methods 0.000 description 1
Description
第１図は本考案の一実施例のブロツク図、第２
図は同実施例の各部信号波形図、第３図は８ミリ
ビデオの記録テープフオーマツトを示す図、第４
図は同８ミリビデオにおける回転ドラムへのテー
プ巻掛状態を示す概略図である。
１……回転ドラム、３ａ，３ｂ……回転ヘツド
、４……ＦＧ検出器、５……ＰＧ検出器、８……
分周器、１２……ビート信号取出回路、１３……
サンプリングホールド回路。
Fig. 1 is a block diagram of an embodiment of the present invention;
The figures are signal waveform diagrams of various parts of the same embodiment, Figure 3 is a diagram showing the recording tape format of 8 mm video, and Figure 4 is a diagram showing the recording tape format of 8 mm video.
The figure is a schematic diagram showing the state in which the tape is wound around the rotating drum in the same 8mm video. 1... Rotating drum, 3a, 3b... Rotating head, 4... FG detector, 5... PG detector, 8...
Frequency divider, 12... Beat signal extraction circuit, 13...
Sampling hold circuit.
Claims (1)
ラツクを設けるとともにこれら両トラツク上にト
ラツキングサーボ用として隣接トラツクとは異な
る周波数成分のパイロツト信号を重畳記録し、再
生時にこのパイロツト信号のビート信号を検出し
、その検出信号に応じて再生ヘツドのトラツキン
グ制御を行なうようにしたヘリカルスキヤン型の
磁気記録再生装置において、回転ドラムの回転制
御用のＰＧ信号に基いてリセツトされ且つＦＧ信
号を１／ｍ及び１／ｎ（但し、ｍ，ｎはｍ＞ｎな
る関係にある正の整数）に分周する分周手段と、
該分周手段からの１／ｍ分周出力を基にヘツド切
換信号を得る手段と、回転ヘツドにて再生される
パイロツト信号のビート信号を取出すビート信号
取出手段と、前記分周手段からの１／ｎ分周出力
に基いて前記ビート信号をサンプリングホールド
する手段とを具備してなり、アフターレコーデイ
ングモード時には前記サンプリングホールド手段
にてホールドされたビート信号を基に回転ヘツド
のトラツキングサーボをかけるようにしたことを
特徴とする磁気記録再生装置。 A PCM audio recording track is provided as an extension of the video recording track, and a pilot signal of a frequency component different from that of the adjacent track is superimposed and recorded on both of these tracks for tracking servo, and the beat signal of this pilot signal is detected during playback. In a helical scan type magnetic recording/reproducing device that performs tracking control of a reproducing head in accordance with the detection signal, the FG signal is reset based on the PG signal for controlling the rotation of the rotating drum, and the FG signal is adjusted to 1/m and 1/m. /n (where m and n are positive integers in the relationship m>n);
means for obtaining a head switching signal based on the 1/m frequency divided output from the frequency dividing means; a beat signal extracting means for extracting a beat signal of a pilot signal reproduced by the rotary head; means for sampling and holding the beat signal based on the /n frequency divided output, and in the after-recording mode, the tracking servo of the rotary head is applied based on the beat signal held by the sampling and holding means. A magnetic recording/reproducing device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14591285U JPH0516664Y2 (en) | 1985-09-24 | 1985-09-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14591285U JPH0516664Y2 (en) | 1985-09-24 | 1985-09-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6255242U true JPS6255242U (en) | 1987-04-06 |
| JPH0516664Y2 JPH0516664Y2 (en) | 1993-05-06 |
Family
ID=31057880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14591285U Expired - Lifetime JPH0516664Y2 (en) | 1985-09-24 | 1985-09-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0516664Y2 (en) |
-
1985
- 1985-09-24 JP JP14591285U patent/JPH0516664Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516664Y2 (en) | 1993-05-06 |
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