JPH0458228B2 - - Google Patents
Info
- Publication number
- JPH0458228B2 JPH0458228B2 JP57145040A JP14504082A JPH0458228B2 JP H0458228 B2 JPH0458228 B2 JP H0458228B2 JP 57145040 A JP57145040 A JP 57145040A JP 14504082 A JP14504082 A JP 14504082A JP H0458228 B2 JPH0458228 B2 JP H0458228B2
- Authority
- JP
- Japan
- Prior art keywords
- video
- signal
- audio
- head
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/02—Control of operating function, e.g. switching from recording to reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
- G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
- G11B5/00847—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks
- G11B5/0086—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks using cyclically driven heads providing segmented tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
- G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
- G11B5/00878—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes transducing different track configurations or formats on the same tape
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
- G11B5/531—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis
- G11B5/534—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis inclined relative to the direction of movement of the tape, e.g. for helicoidal scanning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/7824—Television signal recording using magnetic recording on tape with rotating magnetic heads
- H04N5/7826—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/802—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving processing of the sound signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
- H04N9/835—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal involving processing of the sound signal
- H04N9/8355—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal involving processing of the sound signal the sound carriers being frequency multiplexed between the luminance carrier and the chrominance carrier
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、回転シリンダに取付けた磁気ヘツド
により記録媒体上に映像信号及び音声信号を記録
するように構成したビデオテープレコーダに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a video tape recorder configured to record video and audio signals on a recording medium using a magnetic head attached to a rotating cylinder.
従来例の構成とその問題点
一般に、ビデオテープレコーダ、特に民生用の
ビデオテープレコーダにおいて、音声信号は磁気
テープのテープ幅方向の端に設けられた音声トラ
ツクに高周波バイアスを重畳して固定した磁気ヘ
ツドにて記録し、再生するように構成していた。Conventional configurations and their problems In general, in video tape recorders, especially consumer video tape recorders, audio signals are generated using a magnetic tape that is fixed by superimposing a high frequency bias on the audio track provided at the end of the magnetic tape in the tape width direction. It was configured to record and play back on the head.
しかし、長時間録画のためにテープ走行速度が
非常に遅くなつてきたため、再生された音声信号
の周波数特性は悪く不満足なものであつた。 However, because the tape running speed has become extremely slow due to long-term recording, the frequency characteristics of the reproduced audio signal are poor and unsatisfactory.
発明の目的
本発明の目的は、長時間録画のためにテープ走
行速度が遅くなることに起因する再生された音声
信号の周波数特性の劣化を防ぐことができるビデ
オテープレコーダを提供することにある。OBJECTS OF THE INVENTION An object of the present invention is to provide a video tape recorder that can prevent deterioration of the frequency characteristics of reproduced audio signals caused by slow tape running speed due to long-term recording.
発明の構成
本発明のビデオテープレコーダは、２個の映像
信号の記録再生用磁気ヘツドとアジマスが異なる
とともに、互いに逆のアジマスの２個の磁気ヘツ
ドを回転シリンダに取り付け、この磁気ヘツドを
用いて音声信号で周波数変調した搬送波を記録再
生することにより、映像信号の再生に影響を与え
ることなく、再生される音声信号の高品質化を図
つたものである。Structure of the Invention The video tape recorder of the present invention has two magnetic heads for recording and reproducing video signals with different azimuths and opposite azimuths attached to a rotating cylinder, and using these magnetic heads. By recording and reproducing a carrier wave that is frequency-modulated with an audio signal, it is possible to improve the quality of the reproduced audio signal without affecting the reproduction of the video signal.
実施例の説明
以下、本発明の一実施例について図面とともに
説明する。第１図は本発明の一実施例を示してお
り、図中、１は回転シリンダであり、ビデオヘツ
ド２ａ，２ｂ及びオーデイオヘツド５ａ，５ｂを
有している。ビデオヘツド２ａ，２ｂは回転シリ
ンダ１に180度の位置関係をもつて取付けられて
おり、一方、オーデイオヘツド５ａ，５ｂは回転
シリンダ１に180度の位置関係をもち、かつ、ビ
デオヘツド２ａ，２ｂと90度の位置関係をもつて
取付けられている。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, 1 is a rotary cylinder having video heads 2a, 2b and audio heads 5a, 5b. The video heads 2a, 2b are attached to the rotary cylinder 1 with a 180 degree positional relationship, while the audio heads 5a, 5b are attached to the rotary cylinder 1 with a 180 degree positional relationship, and the video heads 2a, 2b are attached to the rotary cylinder 1 with a 180 degree positional relationship. It is installed with a 90 degree positional relationship.
回転シリンダ１にはテープガイド１６，１７に
よつて磁気テープ３が180度より若干大きい角度
で巻き付けられ、かつ回転シリンダ１の回転軸に
対して所定の角度をもつて巻き付けられている。 A magnetic tape 3 is wound around the rotary cylinder 1 by tape guides 16 and 17 at an angle slightly larger than 180 degrees, and at a predetermined angle with respect to the rotation axis of the rotary cylinder 1.
このような構成において、いま、回転シリンダ
が図示矢印Ｂ方向に回転するものとすると、回転
シリンダ１に取付けられたビデオヘツド２ａ，２
ｂによつて図示矢印Ａ方向に走行している磁気テ
ープ３に周波数変調輝度信号と低域変換色信号か
らなる映像信号が記録され、再生される。そし
て、長時間記録している場合、映像信号は第２図
および第３図に示したように、磁気テープ３のト
ラツク４にガードバンドなく記録される。この
時、ビデオヘツド２ａ，２ｂのヘツドギヤツプの
アジマスをそれぞれ±６度としているので、記録
される磁気パタンはビデオヘツド２ａ，２ｂの走
行方向に対して±６度傾く。 In such a configuration, assuming that the rotary cylinder rotates in the direction of arrow B in the figure, the video heads 2a and 2 attached to the rotary cylinder 1
A video signal consisting of a frequency modulated luminance signal and a low frequency conversion color signal is recorded on the magnetic tape 3 running in the direction of arrow A in the figure as indicated by b, and is reproduced. When recording for a long time, the video signal is recorded on the track 4 of the magnetic tape 3 without a guard band, as shown in FIGS. 2 and 3. At this time, since the azimuths of the head gaps of the video heads 2a and 2b are each set to ±6 degrees, the recorded magnetic pattern is tilted by ±6 degrees with respect to the running direction of the video heads 2a and 2b.
また、回転シリンダ１に取付けられたオーデイ
オヘツド５ａ，５ｂは、第１図に示したような位
置にあり、第３図の破線で示したトラツク６に接
するように取付け高さを調整している。 Furthermore, the audio heads 5a and 5b attached to the rotary cylinder 1 are in the position shown in FIG. 1, and their mounting heights are adjusted so that they are in contact with the track 6 shown by the broken line in FIG. .
第３図は、オーデイオヘツド５ａでオーデイオ
信号のキヤリア（周波数変調オーデイオ信号）を
記録した上に重ねて、ビデオヘツド２ａで映像信
号を記録し、回転シリンダが更に回転してもう一
方のオーデイオヘツド５ｂで、前述のように記録
した映像信号と周波数変調オーデイオ信号の一部
に重なつて周波数変調オーデイオ信号を記録し、
更にその上に重ねてビデオヘツド２ｂで映像信号
を記録している様子を示している。 In FIG. 3, an audio signal carrier (frequency modulated audio signal) is recorded in the audio head 5a, a video signal is recorded in the video head 2a, and the rotary cylinder further rotates to record the carrier signal (frequency modulated audio signal) in the other audio head 5b. Then, record a frequency modulated audio signal overlapping a part of the video signal and frequency modulated audio signal recorded as described above,
Furthermore, it shows how a video signal is being recorded by the video head 2b superimposed on it.
次にオーデイオ信号の記録再生について述べ
る。第５図に示した入力端子７に加えられたオー
デイオ信号は増幅器８で増幅され、変調器９で
1.3MHzに調整された搬送波（キヤリア）を周波
数変調し周波数変徴オーデイオ信号を送る。変調
器９の出力はスイツチ回路１０を経て回転トラン
ス１１に加えられ、回転シリンダ１側に伝わつて
オーデイオヘツド５ａ，５ｂに加えられる。オー
デイオヘツド５ａ、５ｂのヘツドギヤツプは、第
４図に示すように、それぞれ数10度ずつ逆に傾い
ているので、磁気テープ３には第３図に示したト
ラツク６に数10度傾いた磁気パタンが記録され
る。 Next, recording and reproduction of audio signals will be described. The audio signal applied to the input terminal 7 shown in FIG.
A carrier wave adjusted to 1.3MHz is frequency-modulated and a frequency-modified audio signal is sent. The output of the modulator 9 is applied to the rotary transformer 11 via the switch circuit 10, transmitted to the rotary cylinder 1 side, and applied to the audio heads 5a, 5b. As shown in FIG. 4, the head gaps of the audio heads 5a and 5b are each tilted in the opposite direction by several tens of degrees. is recorded.
尚、この時、映像信号が重なつた部分で、磁気
パタンの傾きの差が大きくなるようにオーデイオ
ヘツド５ａ，５ｂを選んで取付けており、また、
オーデイオヘツド５ａ，５ｂで記録したオーデイ
オ信号のキヤリアは、ビデオヘツド２ａ，２ｂで
記録される映像信号で10数dB減衰するので、こ
の減衰量を考慮し、オーデイオ信号のキヤリアの
再生Ｃ／Ｎ（キヤリア対雑音比）が20dB程度にな
るようにオーデイオヘツド５ａ，５ｂに流すキヤ
リア電流を設定している。 At this time, the audio heads 5a and 5b are selected and installed so that the difference in the slope of the magnetic pattern becomes large in the area where the video signals overlap.
The carrier of the audio signal recorded by the audio heads 5a, 5b is attenuated by several 10 dB compared to the video signal recorded by the video head 2a, 2b, so taking this attenuation into account, the reproduction C/N of the carrier of the audio signal ( The carrier currents flowing through the audio heads 5a and 5b are set so that the carrier-to-noise ratio (carrier-to-noise ratio) is about 20 dB.
一方、再生時にはオーデイオヘツド５ａ，５ｂ
で再生されたキヤリアは回転トランス１１を通
り、キヤリアが再生されている側のオーデイオヘ
ツド５ａ，５ｂの出力が得られるよう、スイツチ
回路１０で選択されて連続信号となり、増幅器１
２に加えられる。増幅器１２で増幅されたキヤリ
アを復調器１３で復調し、増幅器１４で増幅すれ
ば、出力端子１５には入力端子７に加えたオーデ
イオ信号を得ることができる。再生時にはオーデ
イオヘツド５ａ，５ｂは映像の記録された部分に
も接触していることになるが、オーデイオヘツド
５ａ，５ｂとビデオヘツド２ａ，２ｂのヘツドギ
ヤツプのアジマスが大きく異なつているため、再
生される映像信号は角度ずれ損失と呼ばれる減衰
を受け、また、オーデイオ信号のキヤリアは
1.3MHz付近に選んでおり、600KHz近辺に選ばれ
た映像信号の低域変換色信号の帯域からは離れ、
映像信号の周波数変調輝度信号キヤリア（3MHz
〜5MHz）からも離れていて、1.3MHz付近は映像
の側帯波であり、側帯波はレベルも低く、無視し
得る。 On the other hand, during playback, the audio heads 5a and 5b
The carrier reproduced at
Added to 2. If the carrier amplified by the amplifier 12 is demodulated by the demodulator 13 and amplified by the amplifier 14, the audio signal applied to the input terminal 7 can be obtained at the output terminal 15. At the time of playback, the audio heads 5a and 5b are also in contact with the recorded portion of the video, but since the azimuths of the head gaps of the audio heads 5a and 5b and the video heads 2a and 2b are significantly different, the video is not played back. The video signal is subject to attenuation called angular shift loss, and the carrier of the audio signal is
It is selected around 1.3MHz, which is far from the low frequency conversion color signal band of the video signal, which is selected around 600KHz.
Frequency modulation luminance signal carrier of video signal (3MHz
~5MHz), and the area around 1.3MHz is the video sideband, and the level of the sideband is low and can be ignored.
もし、オーデイオ信号のキヤリア周波数を低域
変換色信号周波数に重ねると、低域変換色信号は
映像の側帯波よりレベルが高く、また角度ずれ損
失も小さくなつてオーデイオ信号のキヤリアへの
影響は大きになる。オーデイオ信号のキヤリア周
波数を逆に高くしていくと角度ずれ損失は大きく
なるが、映像信号を記録することによるオーデイ
オ信号のキヤリアの記録レベルの減衰が大きくな
り、オーデイオ信号のキヤリアの再生Ｃ／Ｎが悪
化する。このためオーデイオ信号のキヤリア周波
数は1.3MHz付近がよい。 If the carrier frequency of the audio signal is superimposed on the low-frequency conversion color signal frequency, the low-frequency conversion color signal will have a higher level than the video sideband, and the angular shift loss will be smaller, so the effect on the audio signal carrier will be greater. become. Conversely, if the carrier frequency of the audio signal is increased, the angular shift loss will increase, but the attenuation of the recording level of the audio signal carrier due to recording the video signal will increase, and the reproduction C/N of the audio signal carrier will increase. becomes worse. Therefore, the carrier frequency of the audio signal is preferably around 1.3MHz.
同様にビデオヘツド２ａ，２ｂが再生するオー
デイオ信号のキヤリアも角度ずれ損失を受け、ま
たオーデイオ信号のキヤリアの記録レベルは映像
信号を記録することによつて低くなつているので
影響は無視し得る。 Similarly, the carriers of the audio signals reproduced by the video heads 2a and 2b also suffer from angular shift loss, and since the recording level of the carriers of the audio signals has been lowered by recording the video signals, the effect can be ignored.
このようにオーデイオ信号のキヤリア周波数
を、低域変換色信号の周波数と周波数変調輝度信
号のキヤリア周波数の中間で、かつ周波数変調輝
度信号の側帯波が存在する周波数帯域に設定する
と、オーデイオヘツドで再生する映像信号のレベ
ルが低くなり、オーデイオへの映像信号の影響を
小さく抑えることができる。 In this way, if the carrier frequency of the audio signal is set between the frequency of the low-pass conversion chrominance signal and the carrier frequency of the frequency-modulated luminance signal, and to a frequency band in which sidebands of the frequency-modulated luminance signal exist, the audio head will play the signal. The level of the video signal to be transmitted is lowered, and the influence of the video signal on the audio can be suppressed to a small level.
さらに、オーデイオ信号のキヤリアを記録した
上に重ねて映像信号を記録しても、音声Ｓ／Ｎが
十分良好に得られるだけのオーデイオ信号のキヤ
リアは残つており、映像信号は後から記録するの
で、オーデイオ信号のキヤリアを記録しない時と
記録レベルは変わらず、画質に影響はなく、オー
デイオＳ／Ｎは55dB以上、周波数特性は20Hz〜
20KHz、ワウ・フラツタは0.005％の特性を得る
ことができる。 Furthermore, even if you record the video signal on top of the audio signal carrier, there will still be enough audio signal carrier to obtain a sufficiently good audio S/N ratio, and the video signal will be recorded later. , the recording level is the same as when the carrier of the audio signal is not recorded, there is no effect on the image quality, the audio S/N is 55 dB or more, and the frequency response is 20 Hz ~
20KHz, wow/flatter characteristics of 0.005% can be obtained.
尚、本実施例では、オーデイオ信号のキヤリア
と映像信号が重なつて記録された部分でのそれぞ
れの記録パタンの傾きの差が大きくなる場合につ
いて説明したが、オーデイオヘツド５ａと５ｂを
入れ替えて取付け、磁気パタンの傾きの差が小さ
くなるようにしても、ビデオヘツド及びオーデイ
オヘツドの各アジマスはそれぞれ異なつているた
め、本実施例と同様の効果が得られることは言う
までもない。 In this embodiment, a case has been described in which the difference in slope of each recording pattern becomes large in a portion where an audio signal carrier and a video signal are recorded in an overlapping manner. It goes without saying that even if the difference in the inclinations of the magnetic patterns is made smaller, the azimuths of the video head and the audio head are different, so that the same effect as in this embodiment can be obtained.
発明の効果
以上のように本発明は、ビデオヘツドとは互い
にアジマスの異なつたヘツドで周波数変調オーデ
イオ信号を記録するため、長時間録画のためにテ
ープ走行速度が遅くなることに起因する音声信号
の周波数特性の劣化をさせることなく再生するこ
とができるとともに、周波数変調オーデイオ信号
の搬送波周波数を、上記周波数変調輝度信号の搬
送波周波数と低域変換色信号の周波数の中間で、
かつ上記周波数変調輝度信号の側帯波が存在する
帯域に設定しているので、オーデイオヘツドが再
生する映像信号のレベルを低くでき、オーデイオ
への映像信号の影響を小さく抑えることができ
る。Effects of the Invention As described above, the present invention records frequency-modulated audio signals using heads with different azimuths from the video head. The carrier frequency of the frequency modulated audio signal can be reproduced without deteriorating the frequency characteristics, and the carrier frequency of the frequency modulated luminance signal is intermediate between the carrier frequency of the frequency modulated luminance signal and the frequency of the low frequency conversion color signal.
In addition, since the frequency modulated luminance signal is set in a band in which sidebands exist, the level of the video signal reproduced by the audio head can be lowered, and the influence of the video signal on the audio can be suppressed to a small level.
さらに、オーデイオ信号のキヤリアの記録レベ
ルは低く、アジマスを異なるため、ビデオへの影
響が無視でき、本装置で記録したテープを従来の
VTRで再生しても影響がでないという利点を有
し、長時間録画のために、ガードバンドなく記録
したビデオトラツク、オーデイオトラツクを再生
する際、各ヘツドは角度ずれ損失により、隣接ト
ラツクからのクロストークの影響を受けることな
く、映像信号または音声信号のみを再生でき、映
像信号とともに、高品質の音声信号を得ることが
できる。 Furthermore, since the recording level of the audio signal carrier is low and the azimuth is different, the effect on video can be ignored, making it possible to record tapes recorded with this device using
It has the advantage that it has no effect even when played back on a VTR, and when playing back video or audio tracks recorded without a guard band for long-term recording, each head is affected by cross-tracking from adjacent tracks due to angular shift loss. Only the video signal or audio signal can be reproduced without being affected by talk, and a high quality audio signal can be obtained together with the video signal.
また、テープの端に設けられた従来の音声トラ
ツクにもオーデイオ信号を記録してもちいるなら
ば、互換性もあり、非常に有効なものである。 Furthermore, if audio signals are recorded on the conventional audio track provided at the end of the tape, there will be compatibility and it will be very effective.
第１図は本発明のビデオテープレコーダの一実
施例を示す回転シリンダの構成図、第２図、第３
図は同ビデオテープレコーダにおける記録パタン
図、第４図は同ビデオテープレコーダのオーデイ
オヘツドのギヤツプ関係図、第５図は同ビデオテ
ープレコーダにおける音声回路のブロツク図であ
る。
１……回転シリンダ、２ａ，２ｂ……ビデオヘ
ツド、３……磁気テープ、５ａ，５ｂ……オーデ
イオヘツド、１６，１７……テープガイド。
FIG. 1 is a block diagram of a rotary cylinder showing an embodiment of the video tape recorder of the present invention, FIG.
FIG. 4 is a diagram of the recording pattern in the video tape recorder, FIG. 4 is a gap relationship diagram of the audio head of the video tape recorder, and FIG. 5 is a block diagram of the audio circuit in the video tape recorder. 1... Rotating cylinder, 2a, 2b... Video head, 3... Magnetic tape, 5a, 5b... Audio head, 16, 17... Tape guide.
Claims (1)
のヘツドギヤツプのアジマスが互いに逆に傾いた
第１および第２のビデオヘツドと、上記回転シリ
ンダに上記ビデオヘツドとは異なる角度位置に取
付けられ、かつ上記ビデオヘツドとはヘツドギヤ
ツプのアジマスが異なるとともに互いに逆に傾い
た第１および第２のオーデイオヘツドと、オーデ
イオ信号を周波数変調オーデイオ信号に変換する
変調器とを具備し、 上記第１のオーデイオヘツドで上記周波数変調
オーデイオ信号を記録した磁気テープの第１のト
ラツク上に、上記第１のビデオヘツドで周波数変
調輝度信号と低域変換色信号からなる映像信号を
重ねて記録し、上記第２のオーデイオヘツドで上
記周波数変調オーデイオ信号を記録した磁気テー
プの第２のトラツク上に、上記第２のビデオヘツ
ドで周波数変調輝度信号と低域変換色信号からな
る映像信号を重ねて記録するように、上記第１お
よび第２のオーデイオヘツドの取り付け高さを設
定し、かつ、上記第１のトラツクと第２のトラツ
クが互いに一部分重なり、上記周波数変調オーデ
イオ信号と映像信号は共にガードバンドを形成せ
ずに記録されるように構成し、 上記周波数変調オーデイオ信号の搬送波周波数
を、上記周波数変調輝度信号の搬送波周波数と低
域変換色信号の周波数の中間で、かつ上記周波数
変調輝度信号の側帯波が存在する帯域に設定し、
上記周波数変調オーデイオ信号を時間的に連続し
て記録することを特徴とするビデオテープレコー
ダ。[Claims] 1. First and second video heads whose azimuths of head gaps for recording and reproducing video signals attached to a rotating cylinder are tilted in opposite directions, and the rotating cylinder is provided with a head gap at a different angular position from that of the video head. first and second audio heads attached to the video head and having a head gap different in azimuth from the video head and tilted oppositely to each other; and a modulator for converting the audio signal into a frequency modulated audio signal; A video signal consisting of a frequency modulated luminance signal and a low frequency conversion color signal is superimposed and recorded in the first video head on the first track of the magnetic tape on which the frequency modulated audio signal has been recorded in the audio head of the video head. A video signal consisting of a frequency modulated luminance signal and a low-frequency conversion color signal is superimposed and recorded in the second video head on a second track of the magnetic tape on which the frequency modulated audio signal has been recorded in the second audio head. The mounting heights of the first and second audio heads are set such that the first track and the second track partially overlap each other, and the frequency modulated audio signal and the video signal both pass through a guard band. the carrier frequency of the frequency modulated audio signal is intermediate between the carrier frequency of the frequency modulated luminance signal and the frequency of the low-pass converted color signal, and the sideband of the frequency modulated luminance signal is Set to the band where waves exist,
A video tape recorder characterized in that the frequency modulated audio signal is recorded continuously in time.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57145040A JPS5934773A (en) | 1982-08-20 | 1982-08-20 | video tape recorder |
| EP83101457A EP0087114B1 (en) | 1982-02-22 | 1983-02-16 | Video tape recorder |
| DE8383101457T DE3382110D1 (en) | 1982-02-22 | 1983-02-16 | VIDEO TAPE RECORDER. |
| AU11621/83A AU551662B2 (en) | 1982-02-22 | 1983-02-17 | V.t.r. with audio head |
| KR1019830000703A KR860000091B1 (en) | 1982-02-22 | 1983-02-21 | Magnetic tape recorder |
| CA000422032A CA1209251A (en) | 1982-02-22 | 1983-02-21 | Video tape recorder |
| BR8300852A BR8300852A (en) | 1982-02-22 | 1983-02-22 | VIDEO-TAPE RECORDER |
| US07/032,973 US5442451A (en) | 1982-02-22 | 1987-04-02 | Helical scan recording/reproducing device for simultaneously helically recording/reproducing both video and audio signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57145040A JPS5934773A (en) | 1982-08-20 | 1982-08-20 | video tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5934773A JPS5934773A (en) | 1984-02-25 |
| JPH0458228B2 true JPH0458228B2 (en) | 1992-09-16 |
Family
ID=15376000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57145040A Granted JPS5934773A (en) | 1982-02-22 | 1982-08-20 | video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5934773A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59100676A (en) * | 1982-11-30 | 1984-06-09 | Victor Co Of Japan Ltd | Multiplex recording system and multiplex recording and reproducing system |
| JPS59103478A (en) * | 1982-12-03 | 1984-06-14 | Sony Corp | Magnetic recording and reproducing device |
| JPS60246003A (en) * | 1984-05-18 | 1985-12-05 | Mitsubishi Electric Corp | Magnetic video recording and reproducing device |
| JPH0614723B2 (en) * | 1984-07-27 | 1994-02-23 | 株式会社日立製作所 | VTR tracking control system |
| JPS61261803A (en) * | 1985-05-16 | 1986-11-19 | Matsushita Electric Ind Co Ltd | FM audio recording circuit |
| JPH0740322B2 (en) * | 1987-03-12 | 1995-05-01 | シャープ株式会社 | Video tape recorder |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3846819A (en) * | 1967-03-31 | 1974-11-05 | Rca Corp | Method for recording two separate signals |
| JPS55146615A (en) * | 1979-04-26 | 1980-11-15 | Sony Corp | Recording and reproducing device |
| JPS5644285A (en) * | 1979-09-20 | 1981-04-23 | Matsushita Electric Ind Co Ltd | Video and sound signal recording device |
| JPS5763984A (en) * | 1980-10-06 | 1982-04-17 | Hitachi Ltd | 2-channel video tape recorder |
-
1982
- 1982-08-20 JP JP57145040A patent/JPS5934773A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5934773A (en) | 1984-02-25 |
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