JPS60160291A - Recorder - Google Patents

Recorder

Info

Publication number
JPS60160291A
JPS60160291A JP59015455A JP1545584A JPS60160291A JP S60160291 A JPS60160291 A JP S60160291A JP 59015455 A JP59015455 A JP 59015455A JP 1545584 A JP1545584 A JP 1545584A JP S60160291 A JPS60160291 A JP S60160291A
Authority
JP
Japan
Prior art keywords
signal
frequency
circuit
supplied
adjacent tracks
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
JP59015455A
Other languages
Japanese (ja)
Inventor
Masaya Fukuda
福田 督也
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP59015455A priority Critical patent/JPS60160291A/en
Publication of JPS60160291A publication Critical patent/JPS60160291A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/79Processing of colour television signals in connection with recording
    • H04N9/80Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82Transformation 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
    • H04N9/8205Transformation 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 involving the multiplexing of an additional signal and the colour video signal
    • H04N9/8211Transformation 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 involving the multiplexing of an additional signal and the colour video signal the additional signal being a sound signal
    • H04N9/8222Transformation 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 involving the multiplexing of an additional signal and the colour video signal the additional signal being a sound signal using frequency division multiplex
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/79Processing of colour television signals in connection with recording
    • H04N9/80Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82Transformation 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
    • H04N9/83Transformation 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
    • H04N9/835Transformation 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
    • H04N9/8355Transformation 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

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To prevent crosstalk noises from being generated with simple constitution by overlapping a sound signal with an electric potential to change at inaudible low frequency in a video tape recorder (VTR) and shifting modulated frequency by means of the overlapped potential by inaudible high frequency between adjacent tracks. CONSTITUTION:In the titled device a carrier of an FM sound signal AFM from an FM modulator 17 is shifted by an added voltage because a voltage is added in adder 61. Thus carriers of the FM sound signal AFM are different from each other by DELTAf between adjacent tracks. As a result, even if signals in adjacent tracks are cross-talked, their demodulated components are made of only frequency higher than the DELTAf. Assuming that the DELTAf is 15kHz, these noises can be removed by a low-pass filter at the time of reproduction and demodulation.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、音声信号がFM変調され、映像信号と共に記
録されるビデオテープレコーダ(VTR)に適用して好
適な記録装置に藺する。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applied to a recording device suitable for a video tape recorder (VTR) in which an audio signal is FM-modulated and recorded together with a video signal.

背景技術とその問題点 映像信号中の輝度信号を高域側でFM変調すると共に、
クロマ信号を隣接トラック間で周波数インターリーブす
るように低域変換し、互む1にアジマス角の異なる2個
の回転へ・ノドを用し)てテープ。
Background technology and its problems In addition to FM modulating the luminance signal in the video signal on the high frequency side,
The chroma signal is low-frequency converted to interleave the frequency between adjacent tracks, and the chroma signal is rotated to two rotations with different azimuth angles (using a nodule) to the tape.

上の傾斜トラックにガートバンドを置かずGこ記録する
ことが行われている。
Recording is performed without placing a guard band on the upper inclined track.

このようなVTRにおいて、音声信号の記録側よ、従来
は固定ヘッドを用いてテープの移送方向に連続したトラ
ックに、いわゆるオーディオテープレコーダと同様の方
式で行われていた。
In such a VTR, recording of audio signals has conventionally been carried out using a fixed head on continuous tracks in the tape transport direction in a manner similar to that of a so-called audio tape recorder.

ところが上述のVTRにおいて、記録の高密度化を進め
た場合に、テープの移送速度は極めて低速にされ、いわ
ゆる8ミリビデオでは、約1.4em/secにまでさ
れている。このため音声信号の記録において、固定ヘッ
ドとテープとの相対速度が遅くなり、良好な音声信号の
記録が行えなくなってしまっていた。
However, in the above-mentioned VTR, as the recording density has been increased, the tape transport speed has been made extremely slow, and in so-called 8 mm video, it has been reduced to about 1.4 em/sec. For this reason, when recording audio signals, the relative speed between the fixed head and the tape becomes slow, making it impossible to record good audio signals.

そこで音声信号を、FM変調された輝度信号と低域変換
されたクロマ信号との間の帯域でFM変調し、映像信号
に重畳して傾斜トラ・ツクに記録することが提案された
Therefore, it has been proposed to FM-modulate the audio signal in a band between the FM-modulated luminance signal and the low-frequency converted chroma signal, superimpose it on the video signal, and record it on a slope track.

すなわち第1図はいわゆる8ミリビデオの記録系の一例
を示す。図において、入力端子(11からの映像信号が
AGCアンプ(2)、プリエンファシス回路(3)、ク
ランプ回路(4)を通じてFM変調器(5)に供給され
て例えばシンクチップが4.2MHz、ホワイトピーク
が5.4M)IzとなるようにFM変調されたFM輝度
信号YF11が形成される。この信号YF11がバイパ
スフィルタ(6)を通じて混合器(7)に供給される。
That is, FIG. 1 shows an example of a so-called 8 mm video recording system. In the figure, a video signal from an input terminal (11) is supplied to an FM modulator (5) through an AGC amplifier (2), a pre-emphasis circuit (3), and a clamp circuit (4). The FM luminance signal YF11 is FM-modulated so that the peak becomes 5.4M)Iz. This signal YF11 is supplied to a mixer (7) through a bypass filter (6).

また入力端子(11からの映像信号がバンドパスフィル
タ(8)、プリエンファシス回路(9)を通じて低域変
換回路+10+に供給されて副搬送周波数が143.4
1kHzの低域変換クロマ信号Cpが形成される。この
信号CDがローパスフィルタ(11)を通じて混合器(
7)に供給される。
In addition, the video signal from the input terminal (11) is supplied to the low frequency conversion circuit +10+ through the band pass filter (8) and the pre-emphasis circuit (9), and the subcarrier frequency is 143.4.
A low frequency converted chroma signal Cp of 1 kHz is formed. This signal CD passes through a low-pass filter (11) to a mixer (
7).

さらに入力端子(12)からの音声信号がAGCアンプ
(13)を通じてローパスフィルタ(14)に供給され
、帯域が15kHz以下に制限される。この信号がプリ
エンファシス回路(15) 、リミッタ(16)を介し
てFM変調器(17)に供給されて、中心周波数が1.
5MHzのFM音声信号AF11が形成される。この信
号AFNが1.5MHz±100kllzのバンドパス
フィルタ(18)を通じて混合器(7)に供給される。
Furthermore, the audio signal from the input terminal (12) is supplied to a low-pass filter (14) through an AGC amplifier (13), and the band is limited to 15 kHz or less. This signal is supplied to the FM modulator (17) via a pre-emphasis circuit (15) and a limiter (16), and the center frequency is set to 1.
A 5 MHz FM audio signal AF11 is formed. This signal AFN is supplied to the mixer (7) through a 1.5 MHz±100 kllz band pass filter (18).

また回転ヘッドドラム(図示せず)からの回転に同期し
たパルス信号が端子(19)を通してマルチプライヤ(
20)に供給されて4トランクで1周する信号が形成さ
れる。この信号が4周波のパイロット信号形成回路(2
1)に供給されて、各トランクごとに約102.54k
Hz 、 118.95klLz 、165.21kl
Lz、148.69kHzに変化するパイロット信号が
形成される。この信号が混合器(7)に供給される。
In addition, a pulse signal synchronized with the rotation from a rotating head drum (not shown) is transmitted through a terminal (19) to a multiplier (
20) to form a signal that goes around once in four trunks. This signal is a 4-frequency pilot signal forming circuit (2
1) approximately 102.54k for each trunk
Hz, 118.95klLz, 165.21kl
A pilot signal varying at Lz, 148.69kHz is formed. This signal is fed to a mixer (7).

従って混合器(7)からは、例えば第2図に示すように
周波数多重化された記録信号が取り出される。
Therefore, a frequency-multiplexed recording signal is taken out from the mixer (7), as shown in FIG. 2, for example.

なおパイロット信号はトランクごとにいずれか1つのみ
が設けられる。
Note that only one pilot signal is provided for each trunk.

そしてこの記録信号が記録アンプ(22)を通じて互い
にアジマス角の異なる回転ヘッド(23a)、(23b
)に供給される。
Then, this recording signal is passed through the recording amplifier (22) to rotating heads (23a) and (23b) having different azimuth angles.
).

このようにして映像信号及び音声信号の記録が行われる
In this way, video signals and audio signals are recorded.

さらにこのようにして記録された信号を拘止ずるには例
えば次のようにされる。
Furthermore, the signals recorded in this way can be restrained in the following manner, for example.

すなわち第3図において、回転ヘッド(23a )、(
23b )の再生信号がそれぞれアンプ(31a )、
(31b’)を通じて取り出される。このアンプ(31
a )(31b ’)からの信号がスイッチ回路(32
)に供給され、このスイッチ回路(32)が端子(33
)からのヘッド切換信号によって制御される。このスイ
ッチ回路(32)からの信号がバイパスフィルタ(34
)に供給されてFM輝度信号YFMが取り出され、この
信号がリミッタ(35) 、FM復調器(36)、デエ
ンファシス回路(37)に供給されて輝度信号が復調さ
れる。またスイッチ回路(32)からの信号がローパス
フィルタ(38)に供給されて低域変換クロマ信号CD
が取り出され、この信号が烏城変換回v&(39) 、
デエンファシス回路(40)、バンドパスフィルタ(4
1)に供給されてクロマ信号が取り出される。この輝度
信号及びクロマ信号が混合回路(42)で混合されて映
像信号が形成され映像出力端子(43)に出力される。
That is, in FIG. 3, the rotating head (23a), (
23b) are output to the amplifiers (31a) and 31a, respectively.
(31b'). This amplifier (31
a) The signal from (31b') is sent to the switch circuit (32
), and this switch circuit (32) is supplied to the terminal (33
) is controlled by the head switching signal from The signal from this switch circuit (32) is transmitted to the bypass filter (34).
), the FM luminance signal YFM is extracted, and this signal is supplied to a limiter (35), an FM demodulator (36), and a de-emphasis circuit (37) to demodulate the luminance signal. In addition, the signal from the switch circuit (32) is supplied to a low-pass filter (38) to produce a low-pass converted chroma signal CD.
is extracted, and this signal is converted to Karasujo conversion times v & (39),
De-emphasis circuit (40), bandpass filter (4)
1) and the chroma signal is extracted. The luminance signal and chroma signal are mixed in a mixing circuit (42) to form a video signal, which is output to a video output terminal (43).

またスイッチ回路(32)からの信号が中心周波数が1
.5MHzのバンドパスフィルタ(44)に供給されて
FM音声信号AFMが取り出される。この信号AFr+
がリミッタ回路(45)を通じ°ζFM復開器復調6)
に供給されて音声信号が復調される。この音声信号が1
5に41z以下のローパスフィルタ(47)に供給され
る。このローパスフィルタ(47)からの信号がドロッ
プアウト補償用の前置ホールド回路(48)、ローパス
フィルタ(49)、デエンファシス回路(50)、出力
アンプ(51)を通じて音声出力端子(52)に出力さ
れる。
Also, the signal from the switch circuit (32) has a center frequency of 1.
.. The signal is supplied to a 5 MHz bandpass filter (44) and an FM audio signal AFM is extracted. This signal AFr+
is demodulated through the limiter circuit (45) by the °ζ FM demodulator 6)
The audio signal is demodulated. This audio signal is 1
5 is supplied to a low pass filter (47) of 41z or less. The signal from this low-pass filter (47) is output to the audio output terminal (52) through a pre-hold circuit (48) for dropout compensation, a low-pass filter (49), a de-emphasis circuit (50), and an output amplifier (51). be done.

また、スイッチ回路(32)からの信号がドロップアウ
ト検出回路(53)に供給され、この検出信号がボール
ド回路(48)に供給される。
Further, a signal from the switch circuit (32) is supplied to a dropout detection circuit (53), and this detection signal is supplied to a bold circuit (48).

さらにスイッチ回路(32)からの信号がパイロット信
号検出回路(54)に供給されて、4周波のパイロット
信号が検出される。この検出信号がトラッキング制御信
号形成回v&(55)に供給されて、各パイロット信号
のレベルに応じてトランキング制御信号が形成される。
Furthermore, the signal from the switch circuit (32) is supplied to a pilot signal detection circuit (54), and four-frequency pilot signals are detected. This detection signal is supplied to a tracking control signal forming circuit v& (55), and a trunking control signal is formed according to the level of each pilot signal.

この制御信号が端子(56)を通じてザーボ回路(図下
せず)へ供給される。
This control signal is supplied to a servo circuit (not shown below) through a terminal (56).

このようにして映像信号及び音声信号の再生が行われる
In this way, the video signal and the audio signal are reproduced.

そしてこの場合に、音声信号がFM変調されて映像信号
と共に回転ヘッド記録再生されているので、テープの移
送速度が低速にされても音声信号が劣化するようなこと
がない。
In this case, since the audio signal is FM-modulated and recorded and reproduced together with the video signal by the rotary head, the audio signal will not deteriorate even if the tape transport speed is reduced.

ところでこの装置において、通常の記録再生におけるテ
ープ上のトランクパターンは第4図Aに丞ずようになっ
ている。すなわちトランクピッチは例えば20μmとさ
れている。これに対してヘッド幅は15μmに定められ
る。従ってテープ上では隣接トラック間に約5μmの間
隔が設けられる。
By the way, in this apparatus, the trunk pattern on the tape during normal recording and reproduction is similar to that shown in FIG. 4A. That is, the trunk pitch is, for example, 20 μm. On the other hand, the head width is set to 15 μm. Therefore, on the tape there is a spacing of approximately 5 μm between adjacent tracks.

このため通常の記録再生においては、隣接トラックから
のクロストークは極めて少なく、クロストークによる音
質劣化等のおそれはない。
Therefore, during normal recording and reproduction, crosstalk from adjacent tracks is extremely small, and there is no risk of deterioration of sound quality due to crosstalk.

ところがこの装置において、テープの走行速度を通常の
例えば〃にして、より長時間の記録再生を行うことが提
案された。その場合にトラックパターンは第4図Bに示
すようになる。すなわちトランクピッチは10μmとな
り、これを15μmのヘッドで記録するためにトラック
の一部が重ね記録によって消去されて幅10μmのトラ
ックが形成される。従ってこのテープを再生する場合、
ヘッド幅がトランク幅より広いために、隣接トラックか
らのクロストークが生じる。
However, in this device, it has been proposed that the tape running speed be set to the normal speed, for example, to perform recording and playback over a longer period of time. In that case, the track pattern becomes as shown in FIG. 4B. That is, the trunk pitch is 10 μm, and in order to record this with a 15 μm head, a part of the track is erased by overlapping recording to form a track with a width of 10 μm. Therefore, when playing this tape,
Crosstalk from adjacent tracks occurs because the head width is wider than the trunk width.

そしてこのようなりロストークが本来の再生信号に重畳
されて再生されると、例えば第5図Aに示すように、本
来の信号(実線)とクロストーク成分(破線)とがあっ
た場合に、この復調信号は第5図Bに示すように本来の
音声信号(実線)に、2倍のf、(fmは音声帯域= 
15kH2)を頂点にしたノイズ、いわゆる三角ノイズ
(破線)が重畳されたものになってしまう。そしてこの
三角ノイズは、音声帯域でも充分大きなレベルを有して
おり、また隣接トランクの記録信号の周波数、レベルに
よってスペクトラムが変化されるために、音質を劣化さ
せる極めて大きな要因となっていた。
When such losstalk is superimposed on the original reproduced signal and reproduced, for example, as shown in Figure 5A, when there is an original signal (solid line) and a crosstalk component (broken line), this As shown in Fig. 5B, the demodulated signal is the original audio signal (solid line), twice f, (fm is audio band =
15kHz2), which is a so-called triangular noise (dashed line), is superimposed. This triangular noise has a sufficiently high level even in the voice band, and its spectrum changes depending on the frequency and level of the recording signal of the adjacent trunk, so it has become an extremely large factor in deteriorating sound quality.

発明の目的 本発明はこのような点にかんがみ、簡単な構成でクロス
トークノイズの発生が防止されるようにするものである
OBJECTS OF THE INVENTION In view of these points, the present invention aims to prevent the generation of crosstalk noise with a simple configuration.

発明のwA要 本発明は、音声信号を記録される輝度信号とクロマ信号
との間の帯域で周波数変調し、上記輝度信号及びクロマ
信号に混合し、この混合信号を所定期間分ずつ媒体上の
順次のトラックに記録するようにした記録装置において
、上記音声信号に、非可聴の低周波数で変化する電位を
重畳し、この重畳される電位により上記周波数変調の周
波数が隣接の上記トランク間で非可聴の高周波数分シフ
トされるようにした記録装置であって、これによれば簡
単な構成でクロストークノイズの発生を防止することが
できる。
Summary of the Invention The present invention frequency-modulates an audio signal in a band between the recorded luminance signal and chroma signal, mixes it with the luminance signal and chroma signal, and transmits this mixed signal on a medium for a predetermined period of time. In a recording device configured to record on successive tracks, a potential that changes at an inaudible low frequency is superimposed on the audio signal, and the superimposed potential causes the frequency of the frequency modulation to be different between adjacent trunks. This is a recording device that is shifted by an audible high frequency, and according to this, generation of crosstalk noise can be prevented with a simple configuration.

実施例 第6図において、リミッタ(16)からの信号が加算回
路(61)に供給される。また端子(62)からのヘッ
ド切換信号(6082)がA分周回路(63)に供給さ
れて15Hzの信号が形成され、この信号が電圧発生回
路(64)に供給されて15Hzに同期した例えば三角
波形の電圧が形成される。この電圧が加算回路(61)
に供給される。そしてこの加算信号がFM変調器(17
)に供給される。
In the embodiment shown in FIG. 6, a signal from a limiter (16) is supplied to an adder circuit (61). Further, the head switching signal (6082) from the terminal (62) is supplied to the A frequency dividing circuit (63) to form a 15Hz signal, and this signal is supplied to the voltage generation circuit (64) to generate a signal synchronized with 15Hz, for example. A triangular waveform voltage is formed. This voltage is added to the adder circuit (61)
supplied to This added signal is sent to the FM modulator (17
).

なお上述は音声信号経路の要部のみ示したが、他は第1
図と同様に構成される。
Note that the above shows only the main part of the audio signal path, but the rest is the first part.
It is configured as shown in the figure.

この装置において、加算回路(61)で電圧が加算され
ることにより、FM変調器(17)からのFM音声信号
AFMのキャリアが加算される電圧分シフトされる。す
なわち本来のキャリアf o = 1.5MHzの信号
が、第7図に示すように1フイールド後にfo +Δf
になり、2フイールド後にfoに戻され、3フイールド
後にf、−Δfになり、4フイールド後にfoに戻され
、以後これが繰り返えされる。
In this device, by adding voltages in the adding circuit (61), the carrier of the FM audio signal AFM from the FM modulator (17) is shifted by the added voltage. In other words, the original carrier f o = 1.5 MHz signal becomes fo + Δf after one field as shown in Figure 7.
, after 2 fields it is returned to fo, after 3 fields it becomes f, -Δf, after 4 fields it is returned to fo, and this is repeated thereafter.

これによって隣接トランク間でFM音声信号AF11の
キャリアがΔf異ならされることになり、この隣接トラ
ックの信号がクロストークしても、その復調成分は第8
図に示すようにΔfよりも高周波数の成分のみとなる。
As a result, the carrier of the FM audio signal AF11 will be different by Δf between adjacent trunks, and even if the signals of the adjacent tracks crosstalk, the demodulated component will be
As shown in the figure, only components with higher frequencies than Δf are present.

そこでこのΔfを例えば15 k lI zとすること
により、再生復調時このノイズ成分はローパスフィルタ
(47)、(49)で除去することができる。
Therefore, by setting this Δf to, for example, 15 k lI z, this noise component can be removed by the low-pass filters (47) and (49) during reproduction demodulation.

さらに復側信号には、加算された電圧成分も含まれてい
るが、この成分は周波数が1511 zであり、カット
オフ周波数がこの周波数より高いバイパスフィルタを設
けることで除去される。なお一般的に再生機では、スピ
ーカの保護等のために20〜30Hzをカットオフ周波
数とするバイパスフィルタが設けられている。
Further, the return side signal also includes an added voltage component, but this component has a frequency of 1511 z, and is removed by providing a bypass filter with a cutoff frequency higher than this frequency. Note that a regenerator is generally provided with a bypass filter having a cutoff frequency of 20 to 30 Hz to protect the speaker and the like.

こうして音声信号の記録が行われるわけであるが、この
装置によれば再生復調時にクロストークノイズを可聴帯
域以上とすることができ、またそのために加算された信
号を可聴帯域以下とすることができる。従って通電の再
生機において再生復調が可能であり、互換性を保ったま
までクロストークノイズの除去を行うことができる。
This is how audio signals are recorded, and with this device, crosstalk noise can be made above the audible band during reproduction and demodulation, and the added signal can be made below the audible band. . Therefore, reproduction and demodulation can be performed in an energized regenerator, and crosstalk noise can be removed while maintaining compatibility.

なお上述の処理により、FM音声信号AFHの帯域が広
がることになるが、その帯域は±25kHz程度可能で
ある。また加算信号の周波数が1511zでは機種によ
って多少漏洩するおそれがある。そこで現実的には、例
えば第9図に示すように、Δf=25kllzとし、1
0フイールドを周期(6112)とじて変化を行うよう
にする。この場合に隣接トランク間の周波数シフト量は
、50kllz (2Δf)÷5フィールド(A周期)
 = 10kllzとなる。従ってクロストークノイズ
は一部混入することになるが、その量は第10図に示す
ように従来(一点鎖線)に比べわずかである。
Note that the above-described processing widens the band of the FM audio signal AFH, and the band can be approximately ±25 kHz. Furthermore, if the frequency of the addition signal is 1511z, there is a risk of some leakage depending on the model. Therefore, in reality, for example, as shown in FIG. 9, Δf=25kllz and 1
Changes are made every 0 field (6112). In this case, the amount of frequency shift between adjacent trunks is 50 kllz (2Δf) ÷ 5 fields (A period)
= 10kllz. Therefore, some crosstalk noise will be mixed in, but the amount is small compared to the conventional case (dotted chain line) as shown in FIG.

また上述の装置において、加算される電圧の変化は、第
11図に示すように階段状でもよく、またサイン波状あ
るいは鋸歯状でもよい。
Further, in the above-described apparatus, the change in the added voltage may be stepwise as shown in FIG. 11, or may be sine wave or sawtooth.

なおこの装置は音声信号をFM変調し、ギャップ幅の広
いヘッドを用いてテープの磁性層の深I―に記録するよ
うにしたVTRにも適用できる。
This device can also be applied to a VTR in which the audio signal is FM modulated and recorded in the depth I- of the magnetic layer of the tape using a head with a wide gap width.

発明の効果 本発明によれば、簡単な構成でクロストークノイズの発
生を防止することができるようになった。
Effects of the Invention According to the present invention, generation of crosstalk noise can now be prevented with a simple configuration.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図〜第5図は従来の′装置の説明のための図、第6
図は本発明の一例の系統図、第7図、第8図はその説明
のための図、第9図〜第11図は他の例の説明のための
図である。 (17)はFM変調器、(61)は加算回路、(63)
は分周回路、(64)は電圧発生回路である。 第4図 第5図 第6図 へゴ 周濠獣
Figures 1 to 5 are diagrams for explaining the conventional device;
The figure is a system diagram of one example of the present invention, FIGS. 7 and 8 are diagrams for explaining the same, and FIGS. 9 to 11 are diagrams for explaining other examples. (17) is an FM modulator, (61) is an addition circuit, (63)
(64) is a frequency dividing circuit, and (64) is a voltage generating circuit. Figure 4 Figure 5 Figure 6 Go to Surrounding Moat Beast

Claims (1)

【特許請求の範囲】[Claims] 音声信号を記録される輝度信号とクロマ信号との間の帯
域で周波数変調し、上記輝度信号及びクロマ信号に混合
し、この混合信号を所定期間骨ずつ媒体上の順次のトラ
ックに記録するようにした記録装置において、上記音声
信号に、非可聴の低周波数で変化する電位を重畳し、こ
の重畳される電位により上記周波数変調の周波数が隣接
の上記トランク間で非可聴の高周波数分シフトされるよ
うにした記録装置。
The audio signal is frequency-modulated in a band between the luminance signal and chroma signal to be recorded, is mixed with the luminance signal and chroma signal, and this mixed signal is recorded on sequential tracks on the medium one by one for a predetermined period of time. In the recording device, a potential varying at an inaudible low frequency is superimposed on the audio signal, and the superimposed potential shifts the frequency of the frequency modulation by an inaudible high frequency between adjacent trunks. A recording device designed to
JP59015455A 1984-01-31 1984-01-31 Recorder Pending JPS60160291A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59015455A JPS60160291A (en) 1984-01-31 1984-01-31 Recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59015455A JPS60160291A (en) 1984-01-31 1984-01-31 Recorder

Publications (1)

Publication Number Publication Date
JPS60160291A true JPS60160291A (en) 1985-08-21

Family

ID=11889273

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59015455A Pending JPS60160291A (en) 1984-01-31 1984-01-31 Recorder

Country Status (1)

Country Link
JP (1) JPS60160291A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63153977A (en) * 1986-09-06 1988-06-27 サムソン エレクトロニクス カンパニー リミテッド 4 mm video tape format for image recorder/player and the image recorder/player

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63153977A (en) * 1986-09-06 1988-06-27 サムソン エレクトロニクス カンパニー リミテッド 4 mm video tape format for image recorder/player and the image recorder/player

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