JPH01184701A - Magnetic recording and reproducing device - Google Patents
Magnetic recording and reproducing deviceInfo
- Publication number
- JPH01184701A JPH01184701A JP756288A JP756288A JPH01184701A JP H01184701 A JPH01184701 A JP H01184701A JP 756288 A JP756288 A JP 756288A JP 756288 A JP756288 A JP 756288A JP H01184701 A JPH01184701 A JP H01184701A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- sound
- circuit
- magnetic recording
- reproducing
- 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
Links
- 230000005236 sound signal Effects 0.000 claims abstract description 33
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、編集に使用する磁気記録再生装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic recording and reproducing device used for editing.
(従来の技術)
従来2台のビデオテープレコーダ(以下VTRと略す)
を用いて、1台のVTRを再生機(以下ソース機と略す
)として使用し、記録済磁気テープから映像信号および
音声信号を再生し、もう−台のVTRを記録機(以下エ
ディタ機と略す)として使用し、再生映像信号および再
生音声信号を新たな磁気テープに記録する。いわゆる編
集が行われている。この場合のソース機とエディタ機に
よる磁気テープへの音声信号のPCM変調記録における
映像信号および音声信号処理回路のブロック図を第2図
に示す。同図において、ソース機1においては記録済磁
気テープ(図示せず)を回転シリンダ(図示せず)の映
像用回転磁気ヘッド2゜3で再生し、その再生出力を再
生アンプ回路4で増幅するとともにサーボ回路5からの
映像用ヘッドスイッチパルス信号により映像用回転磁気
ヘッド2,3の出力を180度おきに交互に選択し、再
生アンプ回路4の出力を高域通過フィルタ(以下HPF
と略す)回路6を介して得た信号を輝度信号再生回路7
でFM復調することにより再生輝度信号を得ている。再
生アンプ回路4の出力を低域通過フィルタ(以下LPF
と略す)回路8を介して得た信号を色信号再生回路9に
おいて周波数変換することにより再生色信号を得ている
。また前記回転シリンダの音声用回転磁気ヘッド10.
11で再生し、再生出力を再生アンプ回路12で増幅す
るとともにサーボ回路5からの音声用ヘッドスイッチパ
ルス信号により、音声用回転磁気ヘッド10゜11の出
力を180度おきに交互に選択し、再生アンプ回路12
の出力を帯域通過フィルタ(以下BPFと略す)回路1
3を介して得た信号を復調回路14でディジタルデータ
信号に復調するとともに、復調回路14の出力を復号化
回路15において誤り訂正およびデイインターリーブ等
を行ったのち、ディジタル・アナログ(以下D−Aと略
す)変換回路16を介してLchとRchの再生音声信
号を得る。再生輝度信号・再生色信号およびLch −
Rchの再生音声信号は端末は端子17.18.19.
20を介してソース機1からエディタ機21に送られる
。エディタ機21においては、前記RchおよびLch
再生音声信号はアナログ・ディジタル(以下A/Dと略
す)変換回路22でディジタル信号に変換され、符号化
回路23においてインターリーブおよび誤り訂正用符号
の付加等を行い、変調回路24において変調を行ったの
ち、記録アンプ回路25を介して音声用回転磁気ヘッド
26.27により磁気テープ(図示せず)に記録してい
る。また前記再生輝度信号は輝度信号記録回路28にお
いてFM変調されて記録アンプ回路29に入力され、前
記再生色信号は色信号記録回路30において低域変換色
信号となり、記録アンプ回路29に入力され、映像用回
転磁気ヘッド31.32により磁気テープに記録してい
る。(Prior art) Two conventional video tape recorders (hereinafter abbreviated as VTR)
One VTR is used as a playback machine (hereinafter referred to as the source machine) to reproduce video and audio signals from the recorded magnetic tape, and the other VTR is used as a recording machine (hereinafter referred to as the editor machine). ) to record the reproduced video signal and reproduced audio signal on a new magnetic tape. So-called editing is being performed. FIG. 2 shows a block diagram of a video signal and audio signal processing circuit in PCM modulation recording of an audio signal onto a magnetic tape by the source machine and editor machine in this case. In the figure, in a source device 1, a recorded magnetic tape (not shown) is reproduced by a video rotary magnetic head 2°3 of a rotating cylinder (not shown), and the reproduced output is amplified by a reproduction amplifier circuit 4. At the same time, the outputs of the rotating magnetic heads 2 and 3 for images are alternately selected at 180 degree intervals by the image head switch pulse signal from the servo circuit 5, and the output of the reproduction amplifier circuit 4 is filtered through a high-pass filter (hereinafter referred to as HPF).
) The signal obtained through the circuit 6 is transmitted to the luminance signal reproducing circuit 7.
A reproduced luminance signal is obtained by performing FM demodulation. The output of the regenerative amplifier circuit 4 is passed through a low-pass filter (hereinafter referred to as LPF).
A reproduced color signal is obtained by frequency-converting the signal obtained through the circuit 8 in the color signal reproduction circuit 9. Also, the audio rotary magnetic head 10 of the rotary cylinder.
11, the reproduction output is amplified by the reproduction amplifier circuit 12, and the outputs of the audio rotary magnetic heads 10 and 11 are alternately selected every 180 degrees by the audio head switch pulse signal from the servo circuit 5, and the reproduction is performed. Amplifier circuit 12
The output of the band pass filter (hereinafter abbreviated as BPF) circuit 1
3 is demodulated into a digital data signal in a demodulation circuit 14, and the output of the demodulation circuit 14 is subjected to error correction and deinterleaving in a decoding circuit 15. Lch and Rch reproduced audio signals are obtained via the converter circuit 16 (abbreviated as ). Reproduction luminance signal, reproduction color signal and Lch -
The Rch playback audio signal is sent to terminals 17, 18, 19.
It is sent from the source machine 1 to the editor machine 21 via 20. In the editor machine 21, the Rch and Lch
The reproduced audio signal is converted into a digital signal by an analog-to-digital (hereinafter abbreviated as A/D) conversion circuit 22, subjected to interleaving and addition of error correction codes in an encoding circuit 23, and modulated in a modulation circuit 24. Thereafter, the audio data is recorded on a magnetic tape (not shown) via the recording amplifier circuit 25 by the audio rotary magnetic heads 26 and 27. Further, the reproduced luminance signal is FM-modulated in the luminance signal recording circuit 28 and inputted to the recording amplifier circuit 29, the reproduced color signal is converted into a low frequency converted color signal in the color signal recording circuit 30, and is inputted to the recording amplifier circuit 29, Images are recorded on a magnetic tape by rotating magnetic heads 31 and 32 for images.
(発明が解決しようとする問題点)
上記のように2台のVTRを使用して映像信号および音
声信号を編集する場合には、映像信号に対□して音声信
号が復号化回路および符号化回路におけるディジタル信
号処理のために遅れ、特に編集を複数回すると映像信号
と音声信号の時間差が視聴者に認識される欠点があった
。(Problem to be Solved by the Invention) When editing video and audio signals using two VTRs as described above, the audio signal is sent to the decoding circuit and encoded in contrast to the video signal. There was a delay due to digital signal processing in the circuit, and the viewer would notice the time difference between the video signal and the audio signal, especially if editing was performed multiple times.
本発明の目的は、従来の欠点を解消し、2台のVTRを
使用して編集を行う場合の映像信号に対する音声信号の
時間差を小さくする磁気記録再生装置を提供することで
ある。SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording and reproducing apparatus that eliminates the conventional drawbacks and reduces the time difference between an audio signal and a video signal when editing is performed using two VTRs.
(問題点を解決するための手段)
本発明の磁気記録再生装置は、映像信号および音声信号
が記録されている録画済の磁気テープを再生する第1の
磁気記録再生装置と、この第1の磁気記録再生装置の再
生出力を記録する第2の磁気記録再生装置において、第
1の磁気記録再生装置の映像信号出力と音声用再生ヘッ
ド出力とを第2の磁気記録再生装置の入力とするもので
あり、音声信号はPCM変調されて磁気テープに記録さ
れるものである。(Means for Solving the Problems) The magnetic recording and reproducing apparatus of the present invention includes a first magnetic recording and reproducing apparatus that reproduces a recorded magnetic tape on which a video signal and an audio signal are recorded; A second magnetic recording and reproducing device that records the reproduction output of the magnetic recording and reproducing device, in which the video signal output and the audio reproduction head output of the first magnetic recording and reproducing device are input to the second magnetic recording and reproducing device. The audio signal is PCM modulated and recorded on the magnetic tape.
(作 用)
本発明によれば、上記の構成により、ソース機の音声信
号を映像信号に遅れることなくエディタ機で磁気テープ
に記録することができ、画像と音声との時間差をほとん
どなくすることができる。(Function) According to the present invention, with the above configuration, the audio signal of the source device can be recorded on the magnetic tape by the editor device without delaying the video signal, and the time difference between the image and the audio can be almost eliminated. Can be done.
(実施例) 本発明の一実施例を第1図に基づいて説明する。(Example) An embodiment of the present invention will be described based on FIG.
同図は本発明のソース機とエディタ機を用いた編集時の
映像信号および音声信号処理回路のブロック図である。This figure is a block diagram of a video signal and audio signal processing circuit during editing using the source machine and editor machine of the present invention.
第1図において、第2図に示した従来例と同じ部分につ
いては同一符号を付し、その説明を省略する。In FIG. 1, the same parts as those in the conventional example shown in FIG. 2 are designated by the same reference numerals, and their explanation will be omitted.
第1図において1回転シリンダの音声用回転磁気ヘッド
10.11で再生し、再生出力を再生アンプ回路12で
増幅するとともにサーボ回路5がらの音声用ヘッドスイ
ッチパルス信号により、音声用回転磁気ヘッド10.’
11の出力を180度おきに交互に選択し、再生アンプ
回路12の出力をBPF回路13を介して得た信号を復
調回路14でディジタルデータ信号に復調するとともに
、復調回路14の出力を復号化回路15において誤り訂
正およびデイインターリーブ等を行なったのち、D/A
変換回路16を介してLchとRchの再生音声信号を
得、音声信号モニタ端子33.34でLCh −Rch
の再生音声信号をモニタする。前記再生輝度信号、再生
色信号および音声信号処理回路ブロックのBPF回路1
3の出力信号は端子17.18.35を介してソース機
1からエディタ機21に送られる。エディタ機21にお
いては、前記音声信号処理回路ブロックのBPF回路1
3の出力信号が記録アンプ回路25を介して音声用回転
磁気ヘッド26.27により磁気テープ(図示せず)に
記録している。また、前記再生輝度信号は輝度信号記録
回路28においてFM変調されて記録アンプ回路29に
入力され、前記再生色信号は色信号記録回路30におい
て低域変換色信号となり記録アンプ回路29に入力され
、映像用回転磁気ヘッド31.32により磁気テープに
記録する。In FIG. 1, the audio rotary magnetic head 10 and 11 having a one-rotation cylinder reproduce the sound, and the reproduced output is amplified by the reproducing amplifier circuit 12, and the audio rotary magnetic head 10 is amplified by the audio head switch pulse signal from the servo circuit 5. .. '
11 are alternately selected at 180 degree intervals, and the signal obtained from the output of the reproduction amplifier circuit 12 via the BPF circuit 13 is demodulated into a digital data signal by the demodulation circuit 14, and the output of the demodulation circuit 14 is decoded. After performing error correction and deinterleaving in the circuit 15, the D/A
The Lch and Rch playback audio signals are obtained through the conversion circuit 16, and the Lch-Rch is output from the audio signal monitor terminals 33 and 34.
monitor the playback audio signal. BPF circuit 1 of the reproduced luminance signal, reproduced color signal and audio signal processing circuit block
3 is sent from the source machine 1 to the editor machine 21 via terminals 17, 18, and 35. In the editor machine 21, the BPF circuit 1 of the audio signal processing circuit block
The output signals of No. 3 are recorded on a magnetic tape (not shown) via the recording amplifier circuit 25 by audio rotary magnetic heads 26 and 27. Further, the reproduced luminance signal is FM modulated in the luminance signal recording circuit 28 and inputted to the recording amplifier circuit 29, the reproduced color signal is converted into a low frequency converted color signal in the color signal recording circuit 30 and inputted to the recording amplifier circuit 29, Images are recorded on a magnetic tape by rotating magnetic heads 31 and 32 for images.
(発明の効果)
本発明によれば、2台のVTRを使用してソース機から
エディタ機に映像信号および音声信号を編集する場合に
、音声信号のディジタル信号処理に伴う時間が必要ない
ので、映像信号と音声信号との信号処理に伴、う時間差
は発生しなくなり、編集された磁気テープを再生した画
像と音声との時間差が視聴者に認識されることがなく、
その実用上の効果は極めて大である。(Effects of the Invention) According to the present invention, when editing a video signal and an audio signal from a source device to an editor device using two VTRs, no time is required for digital signal processing of the audio signal. Due to the signal processing of the video signal and the audio signal, the time difference no longer occurs, and the time difference between the image and the audio when the edited magnetic tape is played back is not noticeable to the viewer.
Its practical effects are extremely large.
第1図は本発明の一実施例における磁気記録再生装置の
ソース機とエディタ機を用いた編集時の映像信号および
音声信号処理回路のブロック図、第2図は従来の磁気記
録再生装置の同ブロック図である。
1 ・・・ソース機、2.3.31.32・・・映像用
回転磁気ヘッド、4,12・・・再生アンプ回路、5
・・・サーボ回路、6 ・・・HPF回路、7 ・・・
輝度信号再生回路、8 ・・・LPF回路、9 ・・・
色信号再生回路、10.11.26.27・・・音声用
回転磁気ヘッド、13・・・BPF回路、14・・・復
調回路、15・・・復号化回路、16・・・D/A変換
回路、17.18.35・・・端子、21・・・エディ
タ機、25.29・・・記録アンプ回路、28・・・輝
度信号記録回路、30・・・色信号記録回路、 33.
34・・・音声信号モニタ端子。Fig. 1 is a block diagram of a video signal and audio signal processing circuit during editing using a source machine and an editor machine of a magnetic recording and reproducing apparatus according to an embodiment of the present invention, and Fig. 2 is a block diagram of the same circuit of a conventional magnetic recording and reproducing apparatus. It is a block diagram. 1...Source machine, 2.3.31.32...Rotating magnetic head for video, 4,12...Reproduction amplifier circuit, 5
... Servo circuit, 6 ... HPF circuit, 7 ...
Luminance signal regeneration circuit, 8...LPF circuit, 9...
Color signal reproducing circuit, 10.11.26.27... Rotating magnetic head for audio, 13... BPF circuit, 14... Demodulation circuit, 15... Decoding circuit, 16... D/A Conversion circuit, 17.18.35... Terminal, 21... Editor machine, 25.29... Recording amplifier circuit, 28... Luminance signal recording circuit, 30... Color signal recording circuit, 33.
34...Audio signal monitor terminal.
Claims (2)
の磁気テープを再生する第1の磁気記録再生装置と、前
記第1の磁気記録再生装置の再生出力を記録する第2の
磁気記録再生装置において、前記第1の磁気記録再生装
置の映像信号出力と、音声用再生ヘッド出力とを、前記
第2の磁気記録再生装置の入力とすることを特徴とする
磁気記録再生装置。(1) A first magnetic recording and reproducing device that reproduces a recorded magnetic tape on which video signals and audio signals are recorded, and a second magnetic recording and reproducing device that records the reproduction output of the first magnetic recording and reproducing device. A magnetic recording and reproducing device, characterized in that the video signal output of the first magnetic recording and reproducing device and the audio reproducing head output are input to the second magnetic recording and reproducing device.
れることを特徴する請求項(1)記載の磁気記録再生装
置。(2) The magnetic recording and reproducing apparatus according to claim (1), wherein the audio signal is PCM modulated and recorded on the magnetic tape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP756288A JPH01184701A (en) | 1988-01-19 | 1988-01-19 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP756288A JPH01184701A (en) | 1988-01-19 | 1988-01-19 | Magnetic recording and reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01184701A true JPH01184701A (en) | 1989-07-24 |
Family
ID=11669243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP756288A Pending JPH01184701A (en) | 1988-01-19 | 1988-01-19 | Magnetic recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01184701A (en) |
-
1988
- 1988-01-19 JP JP756288A patent/JPH01184701A/en active Pending
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