JPH03116512A - Information recorder - Google Patents

Information recorder

Info

Publication number
JPH03116512A
JPH03116512A JP1252310A JP25231089A JPH03116512A JP H03116512 A JPH03116512 A JP H03116512A JP 1252310 A JP1252310 A JP 1252310A JP 25231089 A JP25231089 A JP 25231089A JP H03116512 A JPH03116512 A JP H03116512A
Authority
JP
Japan
Prior art keywords
track
recording
pilot signal
signal
pilot
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
Application number
JP1252310A
Other languages
Japanese (ja)
Inventor
Mitsuru Owada
満 大和田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP1252310A priority Critical patent/JPH03116512A/en
Publication of JPH03116512A publication Critical patent/JPH03116512A/en
Pending legal-status Critical Current

Links

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

PURPOSE:To accomplish high-density recording and narrow-track recording by recording a pilot signal for controlling tracking in a specified method. CONSTITUTION:The pilot signal for controlling the tracking is always recorded in k(>=1) pilot signal recording areas which are previously fixed among j(>=3) pilot signal recording areas previously fixed on one track. As to the remaining (j-k) pilot signal recording areas, the recording of m(>=3) tracks is consecutively performed in n(>=1) pilot signal recording areas which change in order previously fixed every (m) tracks. Therefore, the number of the recording area for the pilot signal for detecting the bend of a track is not increased, and the scanning of the center of a track is performed by heads H1 and H2 in all the areas of the track. Thus, the high-density recording and the narrow-track recording are accomplished.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は情報記録装置に関し、特に情報信号とともにト
ラッキング制御用パイロット信号を多数の並列するトラ
ックを形成しつつ記録するようにした情報記録装置に関
する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information recording device, and more particularly to an information recording device that records a tracking control pilot signal together with an information signal while forming a large number of parallel tracks. .

〔従来の技術〕[Conventional technology]

従来から、情報記録再生装置、例えば、磁気テープの長
平方向に対して傾斜させた回転ヘッドにより信号を記録
または再生するヘリカル・スキャン型磁気記録再生装置
は、再生時に回転ヘッドをトラック上に正確に走査させ
るトラッキング装置が必須であり、そのトラッキングの
方式としてCTL方式が知られている。
Conventionally, information recording and reproducing devices, such as helical scan type magnetic recording and reproducing devices that record or reproduce signals using a rotating head tilted with respect to the longitudinal direction of a magnetic tape, have been known to precisely position the rotating head on a track during playback. A tracking device for scanning is essential, and the CTL method is known as a tracking method.

この方式は、記録時にドラムの回転に同期したパルス信
号を発生し、これをCTL信号として専用の固定ヘッド
を用いてテープの側縁に記録し、再生時には、このCT
L信号を検出して磁気テープの走行位相を制御するもの
である。これにより回転ヘッドは、走査すべきトラック
上を走査することができる。
This method generates a pulse signal synchronized with the rotation of the drum during recording, records this as a CTL signal on the side edge of the tape using a dedicated fixed head, and during playback, this CT
The L signal is detected to control the running phase of the magnetic tape. This allows the rotary head to scan over the track to be scanned.

しかしながら、このCTL方式は長平方向トラックの存
在により、固定ヘッドを用意しなければならず、装置を
構成する上でテープパス等をその固定ヘッドを意識した
配置とする必要があり、非常に不利であった。また、こ
の固定ヘッドの取付精度がトラッキング精度に直接影響
するので狭トラック化による高密度記録のための高精度
トラッキング装置には適さなかフた。さらに、同じ理由
で、装置の互換性を維持するのが困難であるとともに、
専用ヘッドの追加に伴い、コストが上昇するという問題
点があった。
However, this CTL method is very disadvantageous because it requires a fixed head due to the presence of long horizontal tracks, and it is necessary to arrange the tape path etc. with the fixed head in mind when configuring the device. there were. Further, since the mounting accuracy of this fixed head directly affects the tracking accuracy, it is not suitable for a high-precision tracking device for high-density recording by narrowing the track. Furthermore, for the same reason, it is difficult to maintain equipment compatibility and
There was a problem in that the cost increased with the addition of a dedicated head.

このような問題点を解決し、高密度記録を可能にした方
式としては、パイロット信号を情報信号とともにヘリカ
ルトラックに記録する方式が知られている。
As a method that solves these problems and enables high-density recording, a method is known in which a pilot signal is recorded on a helical track together with an information signal.

このような方式としては、(1)いわゆる8ミリフオー
マツトのビデオテープレコーダ(VTR) に用いられ
ている4周波パイロット方式や、(2)回転ヘッド型の
ディジタルオーディオテープレコーダ(ト0へT)に採
用されているエリア分割パイロット方式が公知である。
Such methods include (1) the four-frequency pilot method used in so-called 8 mm format video tape recorders (VTRs), and (2) the four-frequency pilot method used in rotating head type digital audio tape recorders (T0 to T). The area division pilot system is well known.

(1)4周波パイロット方式は、記録時に互いに異なる
周波数を有する4種のパイロット信号を順次巡回的に1
トラック周期ごとに切り換えて各ビデオ・トラックに映
像信号と周波数多重して記録し、再生時には主に再生し
ているトラックの両側に隣接するトラックからのクロス
トークにより得られる2種のビート信号のレベルを比較
してトラッキングのずれ方向および量を検知し、回転ビ
デオヘッドを走査すべきビデオトラックに正確に追従走
査させるものである。
(1) The 4-frequency pilot method sequentially and cyclically transmits four types of pilot signals with different frequencies during recording.
The levels of two types of beat signals are switched at each track period and frequency-multiplexed with the video signal and recorded on each video track, and during playback, the levels of two types of beat signals are obtained mainly by crosstalk from adjacent tracks on both sides of the track being played. The direction and amount of tracking deviation are detected by comparing the two, and the rotating video head is caused to accurately follow and scan the video track to be scanned.

(2)エリア分割パイロット方式は、記録トラック内に
パイロット信号を記録する専用エリアを設け、複数種類
のパイロット信号を記録する。再生時は、上記専用エリ
ア内での両隣接トラックからのパイロット信号のクロス
トーク量を検出し、検出される量が互いに等しくなるよ
うにトラッキング制御を行うものである。
(2) In the area-divided pilot method, a dedicated area for recording pilot signals is provided within a recording track, and multiple types of pilot signals are recorded. During playback, the amount of crosstalk of pilot signals from both adjacent tracks within the dedicated area is detected, and tracking control is performed so that the detected amounts are equal to each other.

次に、R−DATで用いられるエリア分割パイロット方
式を詳細に説明する。
Next, the area division pilot system used in R-DAT will be explained in detail.

R−DATの記録フォーマットを第7図に示す。図にお
いて、領域ATFIおよび領域ATF2 (ATF :
^utos+atic Track Finding)
は、再生時、記録トラック上を正しく回転ヘッドが走査
するようにトラッキング制御を行うためのパイロット信
号を記録する専用領域である。領域^TFI、ATF2
には、少なくとも一部にパイロット信号としてアジマス
損失の少ない低周波数f1の信号が記録されており(第
7図中、f、で示す部分)、これは再生時に両隣接トラ
ックからのクロストークのレベルの大きさを検出し、そ
のレベル差に応じたトラッキングエラー信号を得るため
に利用される。また、領域ATFIおよびATF2には
、さらに、周波数f1のパイロット信号が記録されてい
る位置を判別するためのシンク信号が記録されている。
The recording format of R-DAT is shown in FIG. In the figure, area ATFI and area ATF2 (ATF:
^utos+atic Track Finding)
is a dedicated area for recording a pilot signal for performing tracking control so that the rotary head correctly scans the recording track during reproduction. Area ^TFI, ATF2
A low frequency f1 signal with little azimuth loss is recorded as a pilot signal in at least a part of it (portion indicated by f in Fig. 7), and this is due to the level of crosstalk from both adjacent tracks during playback. It is used to detect the magnitude of and obtain a tracking error signal according to the level difference. Further, in the areas ATFI and ATF2, a sync signal for determining the position where the pilot signal of frequency f1 is recorded is further recorded.

シンク信号としては、プラスアジマスのトラック(八)
には周波数f2のシンク信号f2が、マイナスアジマス
のトラック(B)には周波数f3のシンク信号がそれぞ
れ所定の位置(第7図中、b、fsで示す位置)に記録
される。周波数f4の消去信号は、記録前の信号を消去
する目的で記録される。
As a sync signal, positive azimuth track (8)
A sync signal f2 with a frequency f2 is recorded on the track (B) of the negative azimuth, and a sync signal with a frequency f3 is recorded on the negative azimuth track (B) at predetermined positions (positions indicated by b and fs in FIG. 7). The erasing signal of frequency f4 is recorded for the purpose of erasing the signal before recording.

周波数f、のパイロット信号は、あるトラックとその両
隣接トラックとで全て記録位置を異ならせ、上記あるト
ラックの両隣接トラックのパイロット信号がそれぞれ異
なるタイミングで再生され検出される。このようなパイ
ロット信号の記録パターンは、第7図に示すように、上
記信号の組み合わせにより4トラックシーケンスになっ
ており、所望のトラックにトラッキングされるように制
御される。
The recording positions of the pilot signals of frequency f are all different between a certain track and both adjacent tracks thereof, and the pilot signals of both adjacent tracks of the certain track are reproduced and detected at different timings. As shown in FIG. 7, the recording pattern of such a pilot signal is a four-track sequence based on a combination of the above-mentioned signals, and is controlled so as to be tracked to a desired track.

Claims (1)

【特許請求の範囲】[Claims] 記録担体に多数の並列するトラックを形成しつつ情報信
号とともにトラッキング制御用パイロット信号を記録す
る情報記録装置において、トラッキング制御用パイロッ
ト信号を、1トラック上に予め定めたj(≧3)箇所の
パイロット信号記録領域のうち、予め定めたk(≧1)
箇所のパイロット信号記録領域には常に記録し、残りの
(j−k)箇所のパイロット信号記録領域には、m(≧
3)トラックごとに予め定めた順番で変化するn(≧1
)個のパイロット信号記録領域に、mトラック連続して
記録するようにしたことを特徴とする情報記録装置。
In an information recording device that records a tracking control pilot signal together with an information signal while forming a large number of parallel tracks on a record carrier, the tracking control pilot signal is recorded at j (≧3) predetermined pilot positions on one track. A predetermined k (≧1) of the signal recording area
It is always recorded in the pilot signal recording area of the remaining (j-k) locations, and m (≧
3) n (≧1) that changes in a predetermined order for each track.
1. An information recording device characterized in that m tracks are continuously recorded in ) pilot signal recording areas.
JP1252310A 1989-09-29 1989-09-29 Information recorder Pending JPH03116512A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1252310A JPH03116512A (en) 1989-09-29 1989-09-29 Information recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1252310A JPH03116512A (en) 1989-09-29 1989-09-29 Information recorder

Publications (1)

Publication Number Publication Date
JPH03116512A true JPH03116512A (en) 1991-05-17

Family

ID=17235474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1252310A Pending JPH03116512A (en) 1989-09-29 1989-09-29 Information recorder

Country Status (1)

Country Link
JP (1) JPH03116512A (en)

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