JPS63232783A - Magnetic recording and amplifying device - Google Patents
Magnetic recording and amplifying deviceInfo
- Publication number
- JPS63232783A JPS63232783A JP62066252A JP6625287A JPS63232783A JP S63232783 A JPS63232783 A JP S63232783A JP 62066252 A JP62066252 A JP 62066252A JP 6625287 A JP6625287 A JP 6625287A JP S63232783 A JPS63232783 A JP S63232783A
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- 230000000740 bleeding effect Effects 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
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Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
この発明は磁気テープ記録再生装置等(以下、rVTR
Jという)の記録増幅装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to magnetic tape recording and reproducing devices, etc. (hereinafter referred to as rVTR).
This relates to a recording amplification device (referred to as J).
し従来の技術1
第5図はVTR等に用いられている従来のFM−AM混
合信号記録増幅装置の回路図で、図において(1)は輝
度信号(以下、「Y信号」という)をFM変調するFM
変調処理回路、(2)はレベル可変のボリュウムをエミ
ッタに持つエミッタフォロア増幅器(以下、「増幅器」
という)、(3)はI M Hzの遮断周波数をもつバ
イパスフィルタ(以下、rHPFJという) 、 (4
)はクロマ信号(以下、「C信号」という)を低域変換
する低域変換クロマ信号処理回路、(5)は出力レベル
可変ボリュウムをエミッタに持つエミッタフォロア増幅
器(以下「増幅器」という’) 、 (8)はFM変調
されたY信号と低域変換されたC信号とを混合するMI
X回路、(7)は混合信号の高域成分の周波数特性を補
正する周波数特性補正増幅器、(8)は混合信号を増幅
しロータリートランス(9)を介してビデオヘッド(1
0) 、 (II)に最適記録電流を流す記録増幅器、
(12)はビデオヘッド(+o) 、 (11)によっ
て混合信号が記録される磁気テープである。Prior Art 1 Figure 5 is a circuit diagram of a conventional FM-AM mixed signal recording and amplifying device used in VTRs, etc. In the figure, (1) shows a luminance signal (hereinafter referred to as "Y signal"). modulating FM
The modulation processing circuit (2) is an emitter follower amplifier (hereinafter referred to as "amplifier") with a variable level volume emitter.
), (3) is a bypass filter (hereinafter referred to as rHPFJ) with a cutoff frequency of I MHz, (4
) is a low frequency conversion chroma signal processing circuit that converts the chroma signal (hereinafter referred to as "C signal") to a low frequency range, (5) is an emitter follower amplifier (hereinafter referred to as "amplifier") having a variable output level volume at its emitter, (8) is an MI that mixes the FM modulated Y signal and the low frequency converted C signal.
X circuit, (7) is a frequency characteristic correction amplifier that corrects the frequency characteristics of high frequency components of the mixed signal, (8) amplifies the mixed signal and connects it to the video head (1) via the rotary transformer (9).
0), (II) a recording amplifier that supplies an optimal recording current to
(12) is a magnetic tape on which a mixed signal is recorded by a video head (+o) and (11).
なお、左参右2チャンネルの音声信号を1.3MHz
と1.7 MHz (1)搬送波でFM変調したF
M音声信号も、図示していないgf声ヘッドによ。In addition, the audio signals of the left and right channels are 1.3MHz.
and 1.7 MHz (1) F modulated by carrier wave
The M audio signal is also sent to a GF voice head (not shown).
つて磁気テープ(12)に深層記録されるが、ここでは
省略な説明は省略する。Although deep recording is performed on the magnetic tape (12), detailed explanation will be omitted here.
次に動作について説明する。Next, the operation will be explained.
FM変調されたY信号増幅器(2)およびHP F (
3)を経てMIX回路(8)へ入力される。FM modulated Y signal amplifier (2) and HP F (
3) and is input to the MIX circuit (8).
他方、低域変換されたC信号は、増幅器(5)をへて、
同じ<MIX回路(6)へ加えられて両信号が混合され
、周波数特性補正回路(7)で周波数特性が補正された
のち次段の記録増幅器(8)へ加えられる。On the other hand, the low frequency converted C signal passes through the amplifier (5),
Both signals are applied to the same MIX circuit (6) and mixed, and after their frequency characteristics are corrected in a frequency characteristic correction circuit (7), they are applied to the next stage recording amplifier (8).
この時の混合されたY信号とC信号の周波数およびレベ
ル関係を示すと第6図のようになる。すなわちベースバ
ンドのY信号は、同期信号の先端を3.4MHz、白信
号のピークレベルを4.4MHzにしたFM信号(デビ
エーションIMHz)にFM変調されるため、サイドバ
ンド波信号が両側にひろがる。他方、C信号(3,58
MHi±500MHz)は、629KHz±500KH
zの低周波C信号(AM波)に変換される。ここでY信
号の下サイドバンド波信号(I M Hz近辺)と、A
M波であるC信号のI M H2付近が互いに交差する
。すなわち、1MHz付近ではFM信号のサイドバンド
波信号とC信号の高域成分が重なりあい、互いに干渉を
おこしてビートを発生したりJ位相歪をおこすのが常で
あった。そこで従来の装置では、Y信号系にIMHI付
近に遮断周波数をもつHP F (3)を設けてこの弊
害を除いていた。The frequency and level relationship between the mixed Y signal and C signal at this time is shown in FIG. That is, since the baseband Y signal is FM-modulated into an FM signal (deviation IMHz) with the leading edge of the synchronization signal at 3.4 MHz and the peak level of the white signal at 4.4 MHz, the sideband wave signal spreads to both sides. On the other hand, the C signal (3,58
MHi±500MHz) is 629KHz±500KH
z is converted into a low frequency C signal (AM wave). Here, the lower sideband wave signal (near I MHz) of the Y signal and the A
The C signals, which are M waves, intersect with each other near I M H2. That is, in the vicinity of 1 MHz, the sideband wave signal of the FM signal and the high frequency component of the C signal usually overlap and interfere with each other, causing beats and J phase distortion. Therefore, in the conventional device, this problem was eliminated by providing HP F (3) having a cutoff frequency near IMHI in the Y signal system.
なお、Y信号の1.3 MHz l!:1.7 MH7
には減衰トラップが設けられている。これは、磁気テー
プ(12)に深層記録されている音声信号の左・右チャ
ンネルのFM変調波信号との干渉を避ける□ためのもの
である。In addition, 1.3 MHz l! of Y signal! :1.7 MH7
is equipped with a damping trap. This is to avoid interference with the FM modulated wave signals of the left and right channels of the audio signal deeply recorded on the magnetic tape (12).
[発明が解決しようとする問題点]
従来の記録増幅装置は以上のように構成されているので
、Y信号のI M Hz以下のサイドバンド波信号が減
衰するためY信号の細部が欠落し、結果的に解像度の低
いY信号成分しか記録出来なかった。またC信号の帯域
も第6図のように狭くしてY信号との干渉を少なくせざ
るをえないため、再生画像の色にじみ1色むら9色おく
れという現象が生じていた。[Problems to be Solved by the Invention] Since the conventional recording amplifier is configured as described above, the sideband wave signal of I MHz or less of the Y signal is attenuated, so that details of the Y signal are lost. As a result, only the Y signal component with low resolution could be recorded. Furthermore, since the band of the C signal must be narrowed as shown in FIG. 6 to reduce interference with the Y signal, a phenomenon occurs in which color fringing in the reproduced image occurs, with one color being delayed by nine colors.
このような問題点を解消するには、Y信号の下側サイド
バンド波を第6図に示すレスポンスよりIMHz〜1.
5MHz付近を持ちあげたレスポンスにする必要があり
、このためにはHP F (3)の遮断周波数を伸ばす
必要がある。In order to solve this problem, the lower sideband wave of the Y signal should be adjusted from IMHz to 1.0MHz according to the response shown in FIG.
It is necessary to raise the response around 5 MHz, and for this purpose it is necessary to extend the cutoff frequency of HP F (3).
またC信号は再生時の色にじみや色むら(カラーPM成
分ノイズ)を押えるには帯域幅を十分とらねばならない
が、このようにすると、Y信号とC信号の干渉が起り、
ビート等が発生するという問題が生じる。In addition, the C signal must have sufficient bandwidth to suppress color fringing and color unevenness (color PM component noise) during playback, but if this is done, interference between the Y signal and the C signal will occur.
A problem arises in that beats and the like occur.
この発明は上記のような問題点を解消するためになされ
たもので、Y信号の高解像度を維持したままビートを押
え、かつ色にじみ9色むら等の弊害のすくない磁気記録
増幅装置を得ることを目的とする。This invention has been made in order to solve the above-mentioned problems, and provides a magnetic recording amplification device that suppresses the beat while maintaining the high resolution of the Y signal and is less likely to have adverse effects such as color bleeding and color unevenness. With the goal.
[問題点を解決するための手段]
この発明に係る磁気記録増幅回路はY信号の下側サイド
バンドのC信号帯域を著しく減衰させるHPFと、同じ
く下側サイドバンドの低域を強調する第1のLPFと、
綜合特性がバタワース特性に近いフィルタ特性を有し、
かつハイファイ音声信号の左右チャンネルのFM搬送波
周波数に減衰トラップをもつ第2のLPFと位相補正回
路とを備えたことを特徴とする。[Means for Solving the Problems] The magnetic recording amplifier circuit according to the present invention includes an HPF that significantly attenuates the C signal band of the lower side band of the Y signal, and a first HPF that emphasizes the low frequency band of the lower side band of the Y signal. The LPF of
It has filter characteristics whose integrated characteristics are close to Butterworth characteristics,
The present invention is characterized in that it includes a second LPF having an attenuation trap at the FM carrier frequency of the left and right channels of the high-fidelity audio signal, and a phase correction circuit.
[作用]
この発明におけるIFFは、Y信号の下側サイドバンド
のC信号帯域を十分に減衰させ、第1のLPFはY信号
の下側サイドバンドの低域を強めるのでY信号の下側サ
イドバンド波成分が充分に存在するため細部が欠落する
ことがない、また、第2のLPFと位相補正回路とは、
振幅一定1位相がほぼ一定のバタワース特性をもち、か
つ、ハイファイ音声信号の左右チャンネルのFM搬送波
周波数に減衰トラップをもっているので、C信号の帯域
が拡大されるとともに、C4s号の位相歪が少ないので
色にじみが改善され、また両信号の非直線系による歪が
軽減されているため色むらが抑えられるとともにY信号
とC信号の干渉によるビートも少なくなる。[Function] The IFF in this invention sufficiently attenuates the C signal band of the lower side band of the Y signal, and the first LPF strengthens the low frequency band of the lower side band of the Y signal, so the lower side band of the Y signal Since there are enough band wave components, no details are lost, and the second LPF and phase correction circuit are
Since it has a Butterworth characteristic where the amplitude is constant and the phase is almost constant, and it has an attenuation trap at the FM carrier frequency of the left and right channels of the high-fidelity audio signal, the C signal band is expanded and the phase distortion of the C4s signal is small. Color fringing is improved, and distortion due to non-linear systems of both signals is reduced, so color unevenness is suppressed and beats due to interference between the Y signal and C signal are also reduced.
[発明の実施例]
以下この発明の一実施例を図について説明する。第1図
において第5図と同一符号は同一構成部分を示しており
、(2G)は0.629 M Hz と約1.1MH2
とに減衰トラップ(極)をもつHPF、(21) 、
(23) 、 (25) 、 (27)は前段と後段の
干渉を除くための緩衝増幅器(以下、「増幅器」という
) 、 (22)は1.5MHzの遮断周波数をもつ第
1のLPF、(24)は1.3MHzに減衰トラップを
もちクロマ帯域を通す第2のLPF、(2B’)は1.
7 MHzに減衰トラップをもつ位相補正回路である。[Embodiment of the Invention] An embodiment of the invention will be described below with reference to the drawings. In FIG. 1, the same symbols as in FIG. 5 indicate the same components, and (2G) is 0.629 MHz and approximately 1.1 MH2
HPF with damping traps (poles) at and, (21),
(23), (25), and (27) are buffer amplifiers (hereinafter referred to as "amplifiers") for removing interference between the front and rear stages, (22) is a first LPF with a cutoff frequency of 1.5 MHz, ( 24) is the second LPF that has an attenuation trap at 1.3MHz and passes the chroma band, and (2B') is the 1.3MHz attenuation trap.
This is a phase correction circuit with an attenuation trap at 7 MHz.
まず、各ブロックのフィルタ特性について説明する。First, the filter characteristics of each block will be explained.
第2図はHP F (20)のレスポンスの一例を示す
図で、低域変換C信号の中心周波数である0、Ef29
MHzに1つの減衰トラップ(極)を持ち、さらに゛低
域変換C信号の高周波成分の1限(約1.1MHz)に
1つの減衰トラップ(極)を持っている。これは1.I
MHz以北の成分(Y信号・の下側サイドバンド波成分
)を通過させるフィルタであり、このY信号経路にC信
号成分が混合されたとき非直線部分で歪が発生すること
がないようにする一種のHPFであって、このHP F
(20)のレスポンスは第4図中のYlに相当する。Figure 2 is a diagram showing an example of the response of HP F (20).
It has one attenuation trap (pole) at MHz, and one attenuation trap (pole) at one limit (approximately 1.1 MHz) of the high frequency component of the low frequency converted C signal. This is 1. I
This is a filter that passes components north of MHz (Y signal/lower sideband wave components), and is designed to prevent distortion from occurring in the non-linear portion when the C signal component is mixed into this Y signal path. This is a kind of HPF that
The response of (20) corresponds to Yl in FIG.
次に第1のL P F (22)は遮断周波数1.5M
H2を有し、かつ、HP F (20)のレスポンスの
2MHt〜I M HZの帯域における急峻な減衰を補
うもので高域成分を犠牲、にして低周波部分をもち上げ
るもので、第4図中のY2 K相当する。Next, the first L P F (22) has a cutoff frequency of 1.5M
H2 and compensates for the steep attenuation in the 2MHt to IMHZ band of the HP F (20) response, sacrificing the high-frequency components and boosting the low-frequency components, as shown in Figure 4. Corresponds to Y2 K in the middle.
したがって、Y信号は、HP F (20)、増幅器(
21)、L P F (22)、増幅器(23)を経る
ことによりレスポンスY1 とY2を重ねあわせたレス
ポンスY3 (第4図示)となる、従来のHP F
(3)のレスポンスYoに相当するためHP F (2
0)およびL P F (22)の作用により、Y信号
のt、2MHz付近のサイドバンド波情報はかなり向上
される(実験的には3dB〜4dBアツプが望ましい)
。Therefore, the Y signal is passed through HP F (20), amplifier (
The conventional HP
Since it corresponds to the response Yo in (3), HP F (2
0) and L P F (22), the sideband wave information near t and 2 MHz of the Y signal is considerably improved (experimentally, 3 dB to 4 dB increase is desirable).
.
次に低域変換C信号が通る第2のL P F (24)
は、第3図中にCIで示すように低域変換C信号(0,
E129±0.5 MHz )の帯域外であって、深層
記録を行なっているハイファイ音声信号のLチャンネル
搬送波1.3MH2に減衰トラップ(極)を持っており
、C信号に及ぼす干渉を低減している(1.3 MHz
−0,829=0.871 MB2 ビート妨害が
低減する)。Next, the second L P F (24) through which the low-frequency converted C signal passes
is a low-frequency converted C signal (0,
E129±0.5 MHz) has an attenuation trap (pole) on the L channel carrier wave 1.3 MH2 of the high-fidelity audio signal that is being deep recorded, which is outside the band and reduces interference with the C signal. (1.3 MHz
-0,829=0.871 MB2 beat disturbance is reduced).
次に位相補正回路(2B)は、前段の第2のL P F
(24)を含めて振幅が一定、位相もほぼ一定となる
バタワース特性をもたせるための補正回路で、屯独の周
波数レスポンスは第3図中の02および第4図中のC2
に示すような一種の狭帯域のバンドパスフィルタである
が、第3図中の02で示すように低域変換C信号の帯域
外で、深層記録を行なっているハイファイ音声信号のR
チャンネル搬送波1.7MHzに減衰トラップ(極)を
持っており、C信号に及ぼす干渉を低減している(1.
7 MHz −0,829= 1.071 MB2゜1
.7 MHz −0,E1213 X 2 =0.44
2 MHzビート妨〆τ
害が低減する)。Next, the phase correction circuit (2B)
(24) is a correction circuit to provide a Butterworth characteristic where the amplitude is constant and the phase is almost constant.
This is a kind of narrowband bandpass filter as shown in Figure 3, but as shown at 02 in Figure 3, it filters the R of the high-fidelity audio signal that is being deep recorded outside the band of the low frequency converted C signal.
It has an attenuation trap (pole) on the channel carrier wave 1.7MHz to reduce interference to the C signal (1.
7 MHz -0,829= 1.071 MB2゜1
.. 7 MHz -0, E1213 X 2 =0.44
2 MHz beat interference is reduced).
次に動作を説明する。Next, the operation will be explained.
先ずFM変調されたY信号はHP F (20) 、増
幅器(21) 、 L P F (22)および増幅器
(23)を経てMIX回路(6)に加えられ、さらに周
波数特性補11:、回路(7)(第4図中のY4に示す
ように5M以」二の高域成分の補正)を経てMIX回路
(8)に加えられる。ここで上述の如< HP F (
20)によるY1特性、L P F (22)によるY
2特性が加えあわさって総合Y特性Y3 (第4図示
)となる、このY3を従来装置の特性YO(第4図示)
に比べると、Y信号のFMサイドバンドの低域成分が強
調補正された高解像度Y信号が得られる。First, the FM modulated Y signal is applied to the MIX circuit (6) via the HP F (20), the amplifier (21), the L P F (22), and the amplifier (23). 7) (correction of high-frequency components of 5M or higher as shown in Y4 in FIG. 4) and then added to the MIX circuit (8). Here, as mentioned above < HP F (
Y1 characteristic according to 20), Y according to L P F (22)
The two characteristics are added together to form the overall Y characteristic Y3 (shown in the fourth figure), and this Y3 is the characteristic YO of the conventional device (shown in the fourth figure).
Compared to this, a high-resolution Y signal is obtained in which the low frequency components of the FM sideband of the Y signal are emphasized and corrected.
次に低域変換されたC信号は、L P F (24)
、増幅器(25) 、位相補正回路(2B)および増幅
器(27)を経てMIX回路(8)に加えられる。ここ
で上述の如(LPF(24)によるC1特性、その上に
位相補正回路(2B)によるC2特性の補正が加えあわ
さり、総合C特性C3(第4図示)となる、このC3を
従来装置の特性Co (トムソン特性)に比べると、
クロマ帯域が広がりフィルタ特性からいう゛と振幅一定
9位相一定のバタワース特性に近づくことになるため色
にじみがなくなる。Next, the low frequency converted C signal is L P F (24)
, an amplifier (25), a phase correction circuit (2B), and an amplifier (27) before being applied to the MIX circuit (8). Here, as described above (the C1 characteristic by the LPF (24) and the correction of the C2 characteristic by the phase correction circuit (2B) are added, the total C characteristic C3 (shown in the fourth figure) is obtained. Compared to the characteristic Co (Thomson characteristic) of
Since the chroma band is broadened and the filter characteristic approaches the Butterworth characteristic of constant amplitude and constant phase, color fringing is eliminated.
このように、Y信号およびC信号ともに高帯域化すると
ともに、各フィルタおよび位相補正の中に極を設けて互
いに不要な信号をトラップ減衰させているため、Y信号
の解像度の向上と、C信号の色にじみの低減が得られる
とともに、干渉、歪が少なくなる。In this way, both the Y signal and the C signal have a high band, and poles are provided in each filter and phase correction to trap and attenuate unnecessary signals from each other, improving the resolution of the Y signal and improving the C signal. In addition to reducing color fringing, interference and distortion are also reduced.
なお、上記実施例では、!1衝増幅塁(21) 。In addition, in the above example,! 1 impact amplification base (21).
(23) 、 (25) 、 (27)を設けたが、(
21) 、 (25)を除いて省略することが出来る場
合もある。これは、緩衝増幅器(21) 、 (25)
を省くと、フィルタの設計が理論値と実験値が異なり難
しくなるのが常だからである。(23), (25), and (27) were provided, but (
21) and (25) may be omitted in some cases. This is a buffer amplifier (21), (25)
This is because if this is omitted, filter design is usually difficult because the theoretical values and experimental values are different.
周波数特性補正回路(7)を増幅器(23)とMIX回
路(8)の間に配設してもよく、また、位相補正回路(
27)を周波数特性補正回路(7)と記録増幅器(8)
の間に配設してもよい。A frequency characteristic correction circuit (7) may be arranged between the amplifier (23) and the MIX circuit (8), and a phase correction circuit (
27) to the frequency characteristic correction circuit (7) and recording amplifier (8)
It may be placed between.
[発明の効果] 以上のように、この発明によれば、Y信号は。[Effect of the invention] As described above, according to the present invention, the Y signal is:
C信号帯域を著しく減衰させるHPFおよび下側サイド
バンドの低域を強調する第1のLPFとを通し、他方、
C信号は、ハイファイ音声信号の左φ右チャンネルのF
M搬送波周波数に減衰トラップを有し、かつ縮合クロマ
信号通過フィルタ特性がバタワース特性に近い特性を有
する第2のLPFおよび位相補正回路を通したのちMI
X回路で混合し、この混合信号を高域成分を強める周波
数特性補正増幅器および記録増幅器を通し、ヘッドを介
して磁気テープに記録するように構成したものであるか
ら、Y信号およびC信号ともに広帯域化が図れるので解
像度が向上するとともに、ビート妨害やモ渉が軽減され
るので色にじみや色むらが軽減される効果がある。through an HPF that significantly attenuates the C signal band and a first LPF that emphasizes the low frequency of the lower sideband;
The C signal is the F of the left and right channels of the high-fidelity audio signal.
MI
Since the mixed signal is mixed in an X circuit, passed through a frequency characteristic correction amplifier that strengthens high-frequency components and a recording amplifier, and recorded on a magnetic tape via a head, both the Y signal and the C signal have a wide band. Since the resolution can be improved, beat interference and blurring can be reduced, which has the effect of reducing color bleeding and color unevenness.
第1図はこの発明の一実施例のブロック図、第2図はH
PFの周波数特性を示す図、第3図はこの実施例の全体
の周波数特性を示す図、第4図はこの実施例のLPFと
位相補正回路の周波数特性を示す図、第5図は従来のV
TRの記録増幅回路を示す図、第6図はその周波数特性
を示す図である。
(1)・・・FM変調処理回路、(4)・・・低域変換
クロマ信号処理回路、(8)・・・MIX回路、(7)
・・・周波数特性補正増幅器、(8)・・・記録増幅器
、(20)・・・HPF、(22) 、 (24)・・
・LPF、(26)・・・位相補正回路。
なお、各図中、同一符号は同一または相当部分を示す。FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
Figure 3 is a diagram showing the frequency characteristics of the PF, Figure 3 is a diagram showing the overall frequency characteristics of this embodiment, Figure 4 is a diagram showing the frequency characteristics of the LPF and phase correction circuit of this embodiment, and Figure 5 is a diagram showing the frequency characteristics of the conventional one. V
FIG. 6 is a diagram showing the recording amplifier circuit of the TR, and FIG. 6 is a diagram showing its frequency characteristics. (1)...FM modulation processing circuit, (4)...Low frequency conversion chroma signal processing circuit, (8)...MIX circuit, (7)
... Frequency characteristic correction amplifier, (8) ... Recording amplifier, (20) ... HPF, (22), (24) ...
-LPF, (26)...phase correction circuit. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
を低域変換したのち混合して磁気テープに記録するとと
もに、当該磁気テープにハイファイ音声信号の左右チャ
ンネルを上記輝度信号の下側サイドバンドの低域と上記
低域変換されたクロマ信号の高域との間に設定した搬送
波でFM変調して上記磁気テープに深層記録するように
構成されている磁気記録増幅装置において、上記輝度信
号のクロマ信号帯域成分を著しく減衰させる HPFと、この輝度信号の低域成分を強調する第1のL
PFと、バタワース特性に近い縮合フィルタ特性および
上記音声信号の左右チャンネルのFM変調信号成分を減
衰させる減衰トラップを有し上記低域変換されたクロマ
信号の高域および低域成分を強調する第2のLPFおよ
び位相補正回路とを備えたことを特徴とする磁気記録増
幅装置。(1) The luminance signal of the video signal is FM modulated, the chroma signal is converted to low frequency, and then mixed and recorded on a magnetic tape, and the left and right channels of the high-fidelity audio signal are recorded on the magnetic tape in the lower side band of the luminance signal. In a magnetic recording amplification device configured to perform deep recording on the magnetic tape by performing FM modulation with a carrier wave set between the low frequency range of the chroma signal and the high frequency range of the low frequency converted chroma signal, the luminance signal of the luminance signal is An HPF that significantly attenuates the chroma signal band components and a first L filter that emphasizes the low frequency components of this luminance signal.
PF, a second filter having a condensed filter characteristic close to the Butterworth characteristic and an attenuation trap that attenuates the FM modulation signal components of the left and right channels of the audio signal, and emphasizes the high and low frequency components of the low frequency converted chroma signal. 1. A magnetic recording amplification device comprising: an LPF and a phase correction circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62066252A JPS63232783A (en) | 1987-03-20 | 1987-03-20 | Magnetic recording and amplifying device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62066252A JPS63232783A (en) | 1987-03-20 | 1987-03-20 | Magnetic recording and amplifying device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63232783A true JPS63232783A (en) | 1988-09-28 |
Family
ID=13310485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62066252A Pending JPS63232783A (en) | 1987-03-20 | 1987-03-20 | Magnetic recording and amplifying device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63232783A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5094829A (en) * | 1973-12-21 | 1975-07-28 | ||
JPS5586282A (en) * | 1978-12-22 | 1980-06-28 | Sony Corp | Recording method for color video signal |
JPS6091791A (en) * | 1983-10-26 | 1985-05-23 | Hitachi Ltd | Magnetic video recording and reproducing device |
JPS61288692A (en) * | 1985-06-17 | 1986-12-18 | Hitachi Ltd | Magnetic recording and reproducing device |
-
1987
- 1987-03-20 JP JP62066252A patent/JPS63232783A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5094829A (en) * | 1973-12-21 | 1975-07-28 | ||
JPS5586282A (en) * | 1978-12-22 | 1980-06-28 | Sony Corp | Recording method for color video signal |
JPS6091791A (en) * | 1983-10-26 | 1985-05-23 | Hitachi Ltd | Magnetic video recording and reproducing device |
JPS61288692A (en) * | 1985-06-17 | 1986-12-18 | Hitachi Ltd | Magnetic recording and reproducing device |
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