JPS63224006A - Video tape recorder - Google Patents
Video tape recorderInfo
- Publication number
- JPS63224006A JPS63224006A JP62057592A JP5759287A JPS63224006A JP S63224006 A JPS63224006 A JP S63224006A JP 62057592 A JP62057592 A JP 62057592A JP 5759287 A JP5759287 A JP 5759287A JP S63224006 A JPS63224006 A JP S63224006A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- frequency component
- luminance signal
- magnetic tape
- 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.)
- Granted
Links
- 230000005236 sound signal Effects 0.000 claims abstract description 14
- 239000002344 surface layer Substances 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 abstract description 6
- 230000003111 delayed effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000000926 separation method Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、２種類のヘッドのうち一方のヘッドによって
ＦＭオーディオ信号の深層記録を行うダブルアジマス４
ヘフド方式のビデオテープレコーダに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a double azimuth 4-channel system that performs deep recording of FM audio signals using one of two types of heads.
This invention relates to a Hefd type video tape recorder.
（従来の技術）
第７図にダブルアジマス４ヘッド方式のビデオテープレ
コーダ（ＶＴＲ）における各ヘッドの配置を示し、第５
図及び第６図にこのヘッド方式を用いて従来杵われてい
るＶＨ３Ｈｉ −Ｆ ｉの多重化方式による周波数分布
を示す、すなわち、ＦＭオーディオ信号（第６図参照）
が磁気テープの深層部に記録されるようになっている。(Prior Art) Figure 7 shows the arrangement of each head in a double azimuth four-head type video tape recorder (VTR).
6 and 6 show the frequency distribution according to the VH3Hi-Fi multiplexing method conventionally punched using this head method, that is, the FM audio signal (see FIG. 6)
is now recorded deep within the magnetic tape.
また、この時、２種類のヘッド（Ｈ＋ 、Ｈｚ及びり、
、ｈｔ）のアジマス角を変えることにより、お互いのク
ロストークを十分に押さえるようにしている。Also, at this time, two types of heads (H+, Hz and
, ht), crosstalk between them is sufficiently suppressed.
（発明が解決しようとする問題点）
しかしながら、この場合輝度信号の帯域がＦＭ伝送帯域
で制限されるため、互換性を確保しながら映像信号の広
帯域化すなわち高解像度を実現するのは困難であるとい
った問題があった。(Problem to be solved by the invention) However, in this case, the band of the luminance signal is limited by the FM transmission band, so it is difficult to achieve a wide band of the video signal, that is, high resolution, while ensuring compatibility. There was such a problem.
（問題点を解決するための手段）
本発明のビデオテープレコーダは、２種類のヘッドのう
ち一方のヘッドによってＦＭオーディオ信号の深層記録
を行うダブルアジマス４ヘッド方式のビデオテープレコ
ーダにおいて、輝度信号の高域成分を前記ＦＭオーディ
オ信号と混合して磁気テープの深層部に記録する第１記
録手段と、輝度信号の低域成分を低域変換クロマ信号と
混合して磁気テープの表層部に記録する第２記録手段と
を備えたものである。(Means for Solving the Problems) The video tape recorder of the present invention is a double azimuth four-head type video tape recorder in which deep recording of an FM audio signal is performed using one of two types of heads. a first recording means that mixes a high frequency component with the FM audio signal and records it on a deep layer of the magnetic tape; and mixes a low frequency component of the luminance signal with a low frequency converted chroma signal and records it on a surface layer of the magnetic tape. and a second recording means.
（作用）
第１記録手段によって輝度信号の高域成分をＦＭオーデ
ィオ信号と混合して磁気テープに記録する。すなわち、
輝度信号の高域成分を低域変換した後同期信号と重畳し
、この重畳した信号をＦＭ変調し帯域制限した後にＦＭ
オーディオ信号と混合して磁気テープの深層部に記録す
る。(Operation) The first recording means mixes the high frequency component of the luminance signal with the FM audio signal and records it on the magnetic tape. That is,
After converting the high frequency component of the luminance signal to low frequency, it is superimposed with the synchronization signal, and this superimposed signal is FM modulated and band limited, and then FM
It is mixed with audio signals and recorded deep into the magnetic tape.
一方、第２記録手段によって輝度信号の低域成分と低域
変換クロマ信号とを混合して磁気テープに記録する。す
なわち、輝度信号の低域成分を２種類のヘッドの取付位
置に応じた時間差分だけ遅延させてＦＭ変調した後、低
域変換クロマ信号と混合し、前記第１記録手段によって
輝度信号の高域成分を前記磁気テープの深層部に記録し
た後、当該磁気テープの表層部に記録する。On the other hand, the second recording means mixes the low frequency component of the luminance signal and the low frequency converted chroma signal and records the mixture on the magnetic tape. That is, after FM modulating the low frequency component of the luminance signal by delaying it by a time difference corresponding to the mounting position of the two types of heads, the high frequency component of the luminance signal is mixed with the low frequency converted chroma signal, and the high frequency component of the luminance signal is After the components are recorded in the deep layer of the magnetic tape, they are recorded in the surface layer of the magnetic tape.
（実施例） 以下、本発明の一実施例を図面を参照して説明する。(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図は、本発明のビデオテープレコーダの記録系の概
略構成を示している。FIG. 1 shows a schematic configuration of a recording system of a video tape recorder according to the present invention.
同図において、１は入力端子、２はくし型フィルタ、３
はローパスフィルタ（ＬＰＦ） 、４は遅延回路、５は
エンファシス回路、６はＷ／Ｄ（ホワイト／ダーク）ク
リップ回路、７はＦＭ変調回路、８は混合器、９は記録
アンプ、１０はバイパスフィルタ（ＨＰＦ） 、１１は
周波数変換器、１２はバンドパスフィルタ（ＢＰＦ）
、１３は重畳回路、１４は同期信号分離回路、１５はＦ
Ｍ変調回路、１６はバンドパスフィルタ（ＢＰＦ）、１
７は混合器、１８は記録アンプである。また、Ｈｌ。In the figure, 1 is an input terminal, 2 is a comb filter, and 3 is an input terminal.
is a low pass filter (LPF), 4 is a delay circuit, 5 is an emphasis circuit, 6 is a W/D (white/dark) clip circuit, 7 is an FM modulation circuit, 8 is a mixer, 9 is a recording amplifier, 10 is a bypass filter (HPF), 11 is a frequency converter, 12 is a band pass filter (BPF)
, 13 is a superimposition circuit, 14 is a synchronization signal separation circuit, 15 is F
M modulation circuit, 16 is a band pass filter (BPF), 1
7 is a mixer, and 18 is a recording amplifier. Also, Hl.
Ｈｌ及びり、、ｈ、は互いにアジマス角の異なる磁気ヘ
ッドである。H1 and H1, , h are magnetic heads having different azimuth angles.
次に、上記構成のビデオテープレコーダの記録系の動作
を第２図の信号波形図を参照して説明する。Next, the operation of the recording system of the video tape recorder having the above configuration will be explained with reference to the signal waveform diagram of FIG.
入力端子１から入力された映像信号はくし型フィルタ２
によって輝度信号〔第２図＜ａｌ参参照色クロマ信号と
に分離され、この分離された輝度信号はＬＰＦ３、ＨＰ
ＦＩＯｌ及び同期信号分離回路１４にそれぞれ入力され
る。The video signal input from input terminal 1 is passed through comb filter 2.
The luminance signal [see Fig. 2<al reference color chroma signal] is separated by
The signals are input to the FIOL and the synchronization signal separation circuit 14, respectively.
ＨＰＦＩＯに入力された輝度信号は、ここで高域成分〔
第２図（Ｃ）参照〕が抽出されて周波数変換器１１に入
力される。そして、この周波数変換器１１で低域に変換
〔第２図（ｄｌ参照〕された後ＢＰＦ１２によって帯域
制限されて重畳回路１３に入力される。この重畳回路１
３には、この信号の他に前記同期信号分離回路１４によ
って輝度信号から取り出された同期信号が入力されてい
る。したがって、ＢＰＦ１２を通った信号はこの重畳回
路１３で同期信号と重畳〔第２図（８１参照〕された後
ＦＭ変調回路１５でＦＭ変調され、ＢＰＦ１６によって
帯域制限されて混合器１７に人力される。The luminance signal input to HPFIO is converted into high-frequency components [
(see FIG. 2C)] is extracted and input to the frequency converter 11. Then, after being converted to a lower frequency band by this frequency converter 11 [see FIG. 2 (see dl)], the band is limited by a BPF 12 and inputted to a superimposition circuit 13.This superposition circuit 1
In addition to this signal, a synchronization signal extracted from the luminance signal by the synchronization signal separation circuit 14 is input to the input signal 3. Therefore, the signal that has passed through the BPF 12 is superimposed with a synchronizing signal in this superimposition circuit 13 [see FIG. .
そして、この混合器１７でＦＭオーディ芽倍信号混合〔
第２図（ｆ）参照〕された後、記録アンプエ８、磁気へ
ラドｈ、、ｈｔを介して磁気テープ（図示省略）の深層
部に記録される。Then, this mixer 17 mixes the FM audio signal.
(see FIG. 2(f)), and is then recorded in the deep part of the magnetic tape (not shown) via the recording amplifier 8 and the magnetic disks h, h, h.
一方、ＬＰＦ３に入力された輝度信号は、ここで低域成
分が抽出されて遅延回路４に入力される。On the other hand, the low frequency component of the luminance signal input to the LPF 3 is extracted here and input to the delay circuit 4.
この遅延回路４の遅延時間は２種類の磁気ヘッドＨ１，
Ｈ２及びり、、ｈ、のヘッドドラム（図示省略）上の取
付位置の時間差に相当する時間に設定されている。この
遅延回路４によって一定時間遅延された輝度信号の低域
成分は、この後エンファシス回路５でエンファシスされ
、Ｗ／Ｄクリップ回路６で一定値以上の白レベルと一定
値以下の黒レベルがカントされた後、ＦＭ変調回路７で
ＦＭ変調されて混合器８に入力される。混合器８には低
域変換クロマ信号が入力されており、ＦＭ変調回路７か
ら入力された輝度信号の低域成分はこの低域変換クロマ
信号と混合〔第２図Ｔｂｌ参照〕され、記録アンプ９、
磁気へラドＨ＋ 、Ｈｌを介して、すでに前記磁気ヘッ
ドｈ、、ｈｔによって輝度信号の高域成分が深層部に記
録された前記磁気テープの表層部に記録される。The delay time of this delay circuit 4 is determined by the two types of magnetic heads H1 and
The time is set to correspond to the time difference between the mounting positions of H2 and H2 and H2 on the head drum (not shown). The low-frequency component of the luminance signal delayed for a certain period of time by this delay circuit 4 is then emphasized by an emphasis circuit 5, and a white level above a certain value and a black level below a certain value are canted by a W/D clip circuit 6. After that, the signal is FM modulated by the FM modulation circuit 7 and input to the mixer 8. A low-frequency converted chroma signal is input to the mixer 8, and the low-frequency component of the luminance signal input from the FM modulation circuit 7 is mixed with this low-frequency converted chroma signal (see Tbl in Figure 2), and then sent to the recording amplifier. 9,
Via the magnetic disks H+ and Hl, the high-frequency components of the luminance signal are recorded in the surface layer of the magnetic tape, which has already been recorded in the deep layer, by the magnetic heads h, , ht.
このように、２種類の磁気ヘッド（Ｈ＋ 、Ｈｚ及びｈ
＋、ｈ２）を有効に使用することにより、輝度信号の高
域成分を磁気テープの深層部に記録することができる。In this way, two types of magnetic heads (H+, Hz and h
+, h2), it is possible to record the high frequency component of the luminance signal in the deep part of the magnetic tape.
第３図は、上記のように記録された映像信号を再生する
再生系の概略ブロック図を示している。FIG. 3 shows a schematic block diagram of a reproduction system for reproducing the video signal recorded as described above.
同図において、２１．２８はヘッドアンプ、２２゜３０
は復調回路、２３はディエンファシス回路、２４は雑音
除去回路、２５は合成回路、２６は輝度信号／色信号（
Ｙ／Ｃ）混合回路、２７．３８は同期信号分離回路、２
９．３５はバンドパスフィルタ（ＢＰＦ） 、３１は遅
延回路、３２は遅延時間の可変可能な例えばＣＯＤを用
いた遅延回路、３３は同期信号除去回路、３４は周波数
変換器、３６はＶＣＯ１３７は位相比較回路である。In the same figure, 21.28 is the head amplifier, 22°30
23 is a demodulation circuit, 23 is a de-emphasis circuit, 24 is a noise removal circuit, 25 is a synthesis circuit, 26 is a luminance signal/chrominance signal (
Y/C) mixing circuit, 27.38 is synchronous signal separation circuit, 2
9. 35 is a band pass filter (BPF), 31 is a delay circuit, 32 is a delay circuit with variable delay time, such as using COD, 33 is a synchronization signal removal circuit, 34 is a frequency converter, 36 is a VCO 137 is a phase This is a comparison circuit.
次に、上記構成のビデオテープレコーダの再生系の動作
を第４図の信号波形図を参照して説明する。Next, the operation of the reproduction system of the video tape recorder having the above configuration will be explained with reference to the signal waveform diagram of FIG.
磁気ヘッドＨ，，Ｈ！により磁気テープから再生された
ＦＭ輝度信号の低域成分とクロマ信号とはヘッドアンプ
２１を経て分離された後、ＦＭ輝度信号は復調回路２２
に入力されてここで復調され、ディエンファシス回路２
３、雑音除去回路２４を経て〔第４図（ａ）参照〕、合
成回路２５と同期信号分離回路２７とにそれぞれ入力さ
れる。Magnetic head H,,H! The low frequency component and chroma signal of the FM luminance signal reproduced from the magnetic tape are separated through the head amplifier 21, and then the FM luminance signal is sent to the demodulation circuit 22.
is input to the de-emphasis circuit 2, where it is demodulated and sent to the de-emphasis circuit 2.
3. The signal passes through the noise removal circuit 24 (see FIG. 4(a)) and is input to the synthesis circuit 25 and the synchronization signal separation circuit 27, respectively.
一方、磁気ヘッドｈ、、ｈ、によって磁気テープから再
生されたＦＭオーディオ信号とＦＭ輝度信号の高域成分
とはヘッドアンプ２８を経て分離された後、ＦＭ輝度信
号はＢＰＦ２９を経て復調回路３０に入力され、ここで
復調される。この復調回路３０で復調された信号〔第４
図中）参照〕は、記録時に輝度信号を遅延した遅延時間
よりもｌ水平走査期間だけ短い遅延回路３１、及び１水
平走査期間に対して周波数により可変できる遅延回路（
例えばＣＯＤディレィライン）３２を経て所定時間遅延
された後、同期信号分離回路３８によってその出力から
同期信号が分離され位相比較回路３７に入力される。一
方、同期信号分離回路２７によって輝度信号から分離さ
れた同期信号も位相比較回路３７に入力されている０位
相比較回路３７では、この２つの同期信号の位相を比較
し、その位相誤差信号をＶＣＯ３６に入力して該ＶＣＯ
３６の周波数を変化させ、前記遅延回路３２の遅延時間
を変化させることにより位相合わせを行う〔第４図（Ｃ
）参照〕。この後、同期信号除去回路３３により同期信
号を除去し〔第４図（ｄ）参照〕、周波数変換器３４に
より記録時に変換した周波数で逆変換を行い、ＢＰＦ３
５を通して輝度信号の高域成分を再生し〔第４図（ｅ）
参照〕、合成回路２５に入力する。合成回路２５では、
前記雑音除去回路２４からの輝度信号の低域成分とこの
ＢＰＦ３５からの輝度信号の高域成分とを合成して広帯
域の輝度信号〔第４図（ｆ）参照〕を再現した後、Ｙ／
Ｃ混合回路２６で３．５８ＭＨｚの色信号と混合して出
力する。これにより、高解像度を実現することができる
ものである。On the other hand, the high-frequency components of the FM audio signal and FM brightness signal reproduced from the magnetic tape by the magnetic heads h, ,h are separated through the head amplifier 28, and then the FM brightness signal is sent to the demodulation circuit 30 through the BPF 29. It is input and demodulated here. The signal demodulated by this demodulation circuit 30 [fourth
)] is a delay circuit 31 that is shorter by l horizontal scanning period than the delay time by which the luminance signal is delayed during recording, and a delay circuit (see Fig.
After being delayed for a predetermined time via a COD delay line (for example) 32, a synchronizing signal is separated from its output by a synchronizing signal separation circuit 38 and input to a phase comparator circuit 37. On the other hand, the 0 phase comparison circuit 37 in which the synchronization signal separated from the luminance signal by the synchronization signal separation circuit 27 is also input to the phase comparison circuit 37 compares the phases of these two synchronization signals and sends the phase error signal to the VCO 36. and select the corresponding VCO.
36 and the delay time of the delay circuit 32 [see Fig. 4 (C
)reference〕. Thereafter, the synchronization signal is removed by the synchronization signal removal circuit 33 [see FIG. 4(d)], and the frequency converter 34 performs inverse conversion using the frequency converted during recording.
5 to reproduce the high-frequency components of the luminance signal [Figure 4 (e)
Reference] is input to the synthesis circuit 25. In the synthesis circuit 25,
After synthesizing the low-frequency component of the luminance signal from the noise removal circuit 24 and the high-frequency component of the luminance signal from the BPF 35 to reproduce a wideband luminance signal [see FIG. 4(f)], Y/
The C mixing circuit 26 mixes the signal with a 3.58 MHz color signal and outputs the mixed signal. This makes it possible to achieve high resolution.
（発明の効果）
以上説明したように、本発明のビデオテープレコーダに
よれば、輝度信号の高域成分をＦＭオーディオ信号と混
合して磁気テープの深層部に記録するとともに、輝度信
号の低域成分を低域変換クロマ信号と混合して磁気テー
プの表層部に記録することにより、再生時、再生輝度信
号の広帯域化すなわち高解像度を実現することができる
。(Effects of the Invention) As explained above, according to the video tape recorder of the present invention, the high frequency component of the luminance signal is mixed with the FM audio signal and recorded in the deep part of the magnetic tape, and the low frequency component of the luminance signal is mixed with the FM audio signal and recorded in the deep part of the magnetic tape. By mixing the component with the low frequency converted chroma signal and recording it on the surface layer of the magnetic tape, it is possible to achieve a wide band of the reproduced luminance signal, that is, high resolution during reproduction.
第１図ないし第４図は本発明のビデオテープレコーダの
一実施例を示し、第１図は記録系の概略ブロック図、第
２図は第１図に示す記録系の各部の信号波形図、第３図
は再生系の概略ブロック図、第４図は第３図に示す再生
系の各部の信号波形図、第５図及び第６図はＶＨ３Ｈｉ
−Ｆ ｉの多重化方式による周波数分布図、第７図は
磁気ヘッドの配置状態を示す図である。
２・・・くし型フィルタ
３・・・ローパスフィルタ
４・・・遅延回路
５・・・エンファシス回路
６・・・Ｗ／Ｄクリップ回路
７．１５・・・ＦＭ変調回路
８．１７・・・混合器
９．１８・・・記録アンプ
１０・・・バイパスフィルタ
１．１・・・周波数変換器
１２．１６・・・バンドパスフィルタ
１３・・・重畳回路
１４・・・同期信号分離回路
Ｈ＋、Ｈｚ、ｈ＋、ｈｚ・・・磁気ヘッド第２図
一屑５ＪＬ我
→ｊｌｉＪＬ敷
→側儂牧
−Ｊｌ ５１叡1 to 4 show an embodiment of the video tape recorder of the present invention, FIG. 1 is a schematic block diagram of the recording system, FIG. 2 is a signal waveform diagram of each part of the recording system shown in FIG. 1, Figure 3 is a schematic block diagram of the reproduction system, Figure 4 is a signal waveform diagram of each part of the reproduction system shown in Figure 3, and Figures 5 and 6 are VH3Hi
FIG. 7 is a frequency distribution diagram according to the multiplexing method of -F i, and is a diagram showing the arrangement state of the magnetic head. 2...Comb filter 3...Low pass filter 4...Delay circuit 5...Emphasis circuit 6...W/D clip circuit 7.15...FM modulation circuit 8.17...Mixing Recording amplifier 10... Bypass filter 1.1... Frequency converter 12.16... Band pass filter 13... Superimposition circuit 14... Synchronization signal separation circuit H+, Hz , h+, hz...Magnetic head Fig. 2 Ichiku 5 JL → jli JL floor → side member Maki-Jl 51 叡
Claims (1)
ーディオ信号の深層記録を行うダブルアジマス４ヘッド
方式のビデオテープレコーダにおいて、 輝度信号の高域成分を前記ＦＭオーディオ 信号と混合して磁気テープの深層部に記録する第１記録
手段と、 輝度信号の低域成分を低域変換クロマ信号 と混合して磁気テープの表層部に記録する第２記録手段
とを備えたことを特徴とするビデオテープレコーダ。[Claims] 1) In a double azimuth four-head type video tape recorder that performs deep recording of an FM audio signal using one of two types of heads, a high-frequency component of a luminance signal is mixed with the FM audio signal. and a second recording means that mixes the low frequency component of the luminance signal with the low frequency converted chroma signal and records it on the surface layer of the magnetic tape. A videotape recorder with special features.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62057592A JPH0740322B2 (en) | 1987-03-12 | 1987-03-12 | Video tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62057592A JPH0740322B2 (en) | 1987-03-12 | 1987-03-12 | Video tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63224006A true JPS63224006A (en) | 1988-09-19 |
| JPH0740322B2 JPH0740322B2 (en) | 1995-05-01 |
Family
ID=13060119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62057592A Expired - Lifetime JPH0740322B2 (en) | 1987-03-12 | 1987-03-12 | Video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0740322B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0684101A (en) * | 1992-03-27 | 1994-03-25 | Samsung Electron Co Ltd | Video-signal recording and regenerating apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5158914A (en) * | 1974-11-20 | 1976-05-22 | Tdk Electronics Co Ltd | |
| JPS52149024A (en) * | 1976-06-04 | 1977-12-10 | Mitsubishi Electric Corp | Tv signal recording/reproducing system |
| JPS5934773A (en) * | 1982-08-20 | 1984-02-25 | Matsushita Electric Ind Co Ltd | Video tape recorder |
-
1987
- 1987-03-12 JP JP62057592A patent/JPH0740322B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5158914A (en) * | 1974-11-20 | 1976-05-22 | Tdk Electronics Co Ltd | |
| JPS52149024A (en) * | 1976-06-04 | 1977-12-10 | Mitsubishi Electric Corp | Tv signal recording/reproducing system |
| JPS5934773A (en) * | 1982-08-20 | 1984-02-25 | Matsushita Electric Ind Co Ltd | Video tape recorder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0684101A (en) * | 1992-03-27 | 1994-03-25 | Samsung Electron Co Ltd | Video-signal recording and regenerating apparatus |
| JP2664324B2 (en) * | 1992-03-27 | 1997-10-15 | 三星電子株式会社 | Video signal recording and playback device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0740322B2 (en) | 1995-05-01 |
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