JPH0466043B2 - - Google Patents
Info
- Publication number
- JPH0466043B2 JPH0466043B2 JP5956883A JP5956883A JPH0466043B2 JP H0466043 B2 JPH0466043 B2 JP H0466043B2 JP 5956883 A JP5956883 A JP 5956883A JP 5956883 A JP5956883 A JP 5956883A JP H0466043 B2 JPH0466043 B2 JP H0466043B2
- Authority
- JP
- Japan
- Prior art keywords
- waveform
- digital data
- storage device
- recording
- data
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Digital Magnetic Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
【発明の詳細な説明】
発明の属する分野
本発明はデジタルデータをFM変調されたシリ
アルデータとしてオーデイオ用磁気テープに録音
するデジタルデータ録音装置に関し、更に詳しく
は録音時の波形形状を所定の形状に設定できるデ
ジタルデータ録音装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a digital data recording device that records digital data as FM-modulated serial data onto an audio magnetic tape, and more specifically, the present invention relates to a digital data recording device that records digital data as FM-modulated serial data on an audio magnetic tape, and more specifically, the present invention relates to a digital data recording device that records digital data as FM-modulated serial data on an audio magnetic tape. This relates to a digital data recording device that can be configured.
従来技術
従来デジタルデータ録音装置はFM変調された
デジタルデータを矩形波の状態で録音装置に入力
してオーデイオ用磁気テープに磁気信号として記
録していた。このデジタルデータは第３図ａの形
状を有するFM変調されたシリアルの矩形波列で
あり、先のオーデイオ用磁気テープに記録された
磁気信号を再生ヘツドにより電気信号に変換し、
増幅装置により所定の電圧値まで増幅すると、第
３図ｂに示す電圧波形が得られる。この電圧波形
ｂは、録音装置、再生ヘツド、再生用増幅回路、
テープ素材等の持つ、電気的磁気的特性により波
形歪を生じており、この電圧波形ｂをしきい値
VTにより整形して得られる矩形波列ｃのパルス
幅は、入力波形ａのパルス幅と大きく異なつてお
り、パルス幅によりデータの表現を行うFM変調
方式ではデータの信頼性が著しく低かつた。Prior Art A conventional digital data recording device inputs FM-modulated digital data in the form of a rectangular wave to the recording device and records it on an audio magnetic tape as a magnetic signal. This digital data is an FM modulated serial rectangular wave train having the shape shown in Fig. 3a, and the magnetic signal recorded on the audio magnetic tape is converted into an electric signal by a reproducing head.
When the voltage is amplified to a predetermined voltage value using an amplifier, a voltage waveform shown in FIG. 3b is obtained. This voltage waveform b is applied to a recording device, a playback head, a playback amplifier circuit,
Waveform distortion occurs due to the electrical and magnetic properties of the tape material, etc., and this voltage waveform b is used as the threshold value.
The pulse width of the rectangular waveform c obtained by shaping with V T is significantly different from the pulse width of the input waveform a, and the reliability of the data is extremely low in the FM modulation method, which expresses data by pulse width. .
発明の目的
本発明はFM変調されたデジタルデータをオー
デイオ用磁気テープに録音する場合に問題となる
上記欠点を一掃すべくなされたものであり、矩形
波を所定の波形に変換して録音することにより、
データの信頼性の高い磁気記録を行うためのデジ
タルデータ録音装置を提供することにある。Purpose of the Invention The present invention was made in order to eliminate the above-mentioned drawbacks that occur when recording FM modulated digital data on an audio magnetic tape, and it is a method of converting a rectangular wave into a predetermined waveform and recording it. According to
An object of the present invention is to provide a digital data recording device for magnetically recording data with high reliability.
発明の構成
以下図面により本発明を詳細に説明する。第１
図は本発明の一実施例を示しており、１は記録す
べきデジタルデータを有するシリアルデータ出力
制御回路である。２はシリアルデータ出力制御回
路１から入力されるデータにより、あらかじめ記
憶させてある波形情報を出力する記憶装置、３は
記憶装置２から得られる波形情報に応じた電圧を
出力するDA変換器、４は入力される電気信号を
磁気信号に変換し、オーデイオ用磁気テープに記
録する録音装置である。Structure of the Invention The present invention will be explained in detail below with reference to the drawings. 1st
The figure shows one embodiment of the present invention, where 1 is a serial data output control circuit having digital data to be recorded. 2 is a storage device that outputs pre-stored waveform information based on data input from the serial data output control circuit 1; 3 is a DA converter that outputs a voltage according to the waveform information obtained from the storage device 2; 4; is a recording device that converts input electrical signals into magnetic signals and records them on audio magnetic tape.
そして本発明の特徴とするところは、記憶装置
２およびDA変換器３にあり、記録すべきデジタ
ルデータの“０”，“１”に対応した所定の波形情
報を記憶装置２に記憶させ、これをDA変換器３
を介し録音装置４に与える構成を有している。 The feature of the present invention is that the storage device 2 and the DA converter 3 store predetermined waveform information corresponding to "0" and "1" of the digital data to be recorded. DA converter 3
The recording device 4 is provided with the following information.
作 用
次にこの実施例の動作について説明する。シリ
アルデータ出力制御回路１は、あらかじめ本回路
に格納されている録音されるべきデジタルデータ
を、録音する順序に従つて同時に調べ、記憶装置
２に記憶されている波形のうちいずれを録音用の
出力とすべきかを選択し、この選択情報を記憶装
置２に与える。記憶装置２は、前記選択情報に従
い、あらかじめ記憶してある波形情報をDA変換
器３に出力して行く。DA変換器３は記憶装置２
から得られる波形情報を電圧信号に変換し第４図
ａのような波形を生成し、これを録音装置４に出
力する。録音装置４はDA変換器３より入力する
電圧信号第４図ａを磁気信号に変換し、オーデイ
オ用磁気テープに録音する。このようにして得ら
れたオーデイオ用磁気テープを再生すると、得ら
れる電気信号波形は第４図ｂのような形状を有し
ており、これをしきい値VTにより整形して得ら
れる矩形波列ｃのパルス幅は、入力信号ａとほぼ
等しいものとなりデータの信頼性が向上する。Operation Next, the operation of this embodiment will be explained. The serial data output control circuit 1 simultaneously examines the digital data to be recorded that has been stored in this circuit in advance in the recording order, and determines which of the waveforms stored in the storage device 2 should be output for recording. This selection information is provided to the storage device 2. The storage device 2 outputs pre-stored waveform information to the DA converter 3 according to the selection information. DA converter 3 is storage device 2
The obtained waveform information is converted into a voltage signal to generate a waveform as shown in FIG. 4a, and this is output to the recording device 4. The recording device 4 converts the voltage signal (FIG. 4a) input from the DA converter 3 into a magnetic signal and records it on an audio magnetic tape. When the audio magnetic tape obtained in this way is reproduced, the obtained electric signal waveform has a shape as shown in Fig. 4b, and it is shaped into a rectangular wave obtained by shaping this by a threshold value V T. The pulse width of column c is approximately equal to that of input signal a, improving data reliability.
尚、記憶装置２に記憶させる波形情報は以下の
ようにして決定する。 Note that the waveform information to be stored in the storage device 2 is determined as follows.
第２図に示すような“０”，“１”の繰返し波形
を矩形波のまま録音し、これを再生して得られ
る信号1を第２図に示した周期Ｔでフーリエ展開
する。 A repeating waveform of "0" and "1" as shown in FIG. 2 is recorded as a rectangular wave, and the signal 1 obtained by reproducing this is subjected to Fourier expansion at the period T shown in FIG.
1＝∞ 〓n=1 1 2n−１ (1) また、入力信号も同様にフーリエ展開する。 1 = ∞ 〓 n=1 1 2n−1 (1) The input signal is also Fourier expanded in the same way.
＝∞
〓n=1
2n−１ (2)
ここで式(1)，(2)の５次の成分に注目し、波形歪
補正関数ｇを求める。 = ∞ 〓 n=1 2n−1 (2) Now, focusing on the fifth-order component of equations (1) and (2), the waveform distortion correction function g is determined.
15１／11１＝α、11 5１／11 1１＝β、β／α
＝１／Ａ(3)
＜1 5−＜1 1＝− (4)
ｇ＝A151ei (5)
この(5)式のｇを用い出力波形Ｆを以下のように求
める。 1 5 1/1 1 1=α, 1 1 5 1/1 1 1 1=β, β/α
=1/A(3) < 1 5 −< 1 1 =− (4) g=A1 5 1e i (5) Using g in equation (5), the output waveform F is determined as follows.
Ｆ＝−5＋ｇ (6)
(6)式で求められる出力波形の一例が第４図ａであ
り、これを“０”に対応する波形PH0、PL0、“１”
に対応する波形PH1、PL1の４つに分割し、各々を
分割しデジタル情報化して記憶装置２に記憶させ
る波形情報とする。 F= -5 +g (6) An example of the output waveform obtained by equation (6) is shown in Figure 4a, and this is used as the waveforms P H0 , P L0 , and "1" corresponding to "0".
The waveform P H1 and P L1 corresponding to the waveform P H1 and P L1 are divided into four parts, each of which is divided and converted into digital information to be used as waveform information to be stored in the storage device 2.
尚、本実施例は単一の録音再生の電気的磁気的
特性による波形歪を補正する構成となつている
が、磁気テープの高速複写の際に生じるＡ面、Ｂ
面での特性差も補正することが可能であり、この
場合には記憶装置２を２系統並列に設け、Ａ面用
の出力波形情報を一方の記憶装置に記憶させ、Ｂ
面用の出力波形を他方の記憶装置に記憶させ、
各々を場合に応じて切り替えて録音する構成とな
る。その作用に関しては前述の場合と同様なので
説明を省略する。 Although this embodiment is configured to correct waveform distortion due to the electric and magnetic characteristics of a single recording/playback,
It is also possible to correct the difference in characteristics between the two sides. In this case, two storage devices 2 can be installed in parallel, and the output waveform information for the A side is stored in one storage device, and the output waveform information for the A side is stored in one storage device.
Store the output waveform for the surface in the other storage device,
The configuration is such that each can be switched and recorded depending on the situation. Since its operation is the same as that described above, the explanation will be omitted.
発明の効果
以上述べたように、本発明によればオーデイオ
用磁気テープに録音すべきデジタルデータに従つ
て、波形歪を補正する波形に変換した後にデータ
を録音するため、このオーデイオ用磁気テープを
再生した場合の出力波形の歪が極めて少なく、矩
形波に整形した時のパルス幅は、入力波形のパル
ス幅とほぼ等しいものとなり、FM変調方式によ
るデジタルデータの磁気記録としては極めて信頼
性の高いものを得ることができるという効果を有
する。Effects of the Invention As described above, according to the present invention, according to the digital data to be recorded on an audio magnetic tape, the data is recorded after being converted into a waveform that corrects waveform distortion. The distortion of the output waveform when played back is extremely low, and the pulse width when shaped into a rectangular wave is almost equal to the pulse width of the input waveform, making it extremely reliable for magnetic recording of digital data using the FM modulation method. It has the effect of being able to obtain something.
第１図は本発明の一実施例を示すブロツク図、
第２図は録音波形を決定する際に用いるデータ列
図、第３図は従来の方法による録音波形ａ、再生
波形ｂ、整形波形ｃ、第４図は本発明によつた場
合の録音波形ａ、再生波形ｂ、整形波形ｃを示す
図である。
１……シリアルデータ出力制御回路、２……記
憶装置、３……DA変換器、４……録音装置。
FIG. 1 is a block diagram showing one embodiment of the present invention;
Fig. 2 is a data string diagram used to determine the recording waveform, Fig. 3 is a recording waveform a, playback waveform b, and shaped waveform c according to the conventional method, and Fig. 4 is a recording waveform a according to the present invention. , a reproduced waveform b, and a shaped waveform c. 1... Serial data output control circuit, 2... Storage device, 3... DA converter, 4... Recording device.
Claims (1)
オーデイオ用磁気テープに録音する装置におい
て、前記デジタルデータを入力する記憶装置と、
この記憶装置の出力をＤ／Ａ変換するためのＤ／
Ａ変換器とを備え、前記記憶装置に所定の出力波
形に応じたデータを記憶しておくことにより、通
常矩形波の状態で録音される前記デジタルデータ
を所定の波形形状に変換して録音する構成とした
ことを特徴とするデジタルデータ録音装置。 ２ 前記記憶装置に記憶させるための波形データ
を、基本データ列を録音再生分析して得られる波
形歪量を５次の高調波により補正する関数により
求めた値で構成したことを特徴とする特許請求範
囲第１項記載のデジタルデータ録音装置。[Claims] 1. A device for recording FM-modulated serial digital data onto an audio magnetic tape, comprising: a storage device into which the digital data is input;
A D/A converter for D/A converting the output of this storage device.
A converter, and by storing data corresponding to a predetermined output waveform in the storage device, the digital data, which is normally recorded in a rectangular wave state, is converted into a predetermined waveform shape and recorded. A digital data recording device characterized by the following configuration. 2. A patent characterized in that the waveform data to be stored in the storage device is composed of values determined by a function that corrects the amount of waveform distortion obtained by recording and reproducing analysis of the basic data string using a fifth-order harmonic. A digital data recording device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5956883A JPS59185010A (en) | 1983-04-05 | 1983-04-05 | Digital data recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5956883A JPS59185010A (en) | 1983-04-05 | 1983-04-05 | Digital data recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59185010A JPS59185010A (en) | 1984-10-20 |
| JPH0466043B2 true JPH0466043B2 (en) | 1992-10-22 |
Family
ID=13116970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5956883A Granted JPS59185010A (en) | 1983-04-05 | 1983-04-05 | Digital data recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59185010A (en) |
-
1983
- 1983-04-05 JP JP5956883A patent/JPS59185010A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59185010A (en) | 1984-10-20 |
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