JPH0677387B2 - Video signal recording / reproducing device - Google Patents
Video signal recording / reproducing deviceInfo
- Publication number
- JPH0677387B2 JPH0677387B2 JP60166108A JP16610885A JPH0677387B2 JP H0677387 B2 JPH0677387 B2 JP H0677387B2 JP 60166108 A JP60166108 A JP 60166108A JP 16610885 A JP16610885 A JP 16610885A JP H0677387 B2 JPH0677387 B2 JP H0677387B2
- Authority
- JP
- Japan
- Prior art keywords
- video
- signal
- supplied
- video signal
- dubbing
- 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
Landscapes
- Television Signal Processing For Recording (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Management Or Editing Of Information On Record Carriers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はダビングに好適な映像信号記録再生装置に関す
る。The present invention relates to a video signal recording / reproducing apparatus suitable for dubbing.
〔発明の概要〕 本発明は、ビデオテーブレコーダの再生側で信号処理を
行なうようにした映像信号記録再生装置において、信号
処理用制御信号及び未処理の再生映像信号とを時分割で
出力してダビング用信号とすることにより、ダビングに
よる再生画像の品位の劣化を防止するようにしたもので
ある。SUMMARY OF THE INVENTION The present invention provides a video signal recording / reproducing apparatus in which signal processing is performed on the reproducing side of a video tape recorder, by outputting a signal processing control signal and an unprocessed reproduced video signal in a time division manner. By using the signal for dubbing, deterioration of the quality of the reproduced image due to dubbing is prevented.
まず、従来のデジタルビデオテープレコーダ（以下、D-
VTRと略称する）間のダビングについて、第４図を参照
しながら説明する。First, the conventional digital video tape recorder (hereinafter D-
Dubbing between VTRs) will be described with reference to FIG.
第４図において、（１）は主記録再生装置（マスター装
置）を全体として示し、カメラCMからのアナログ映像信
号が入力端子（11）に供給され、図示を省略したA-D変
換器によりデジタルビデオデータに変換されて、D-VTR
（記録・再生系）（12）に供給される。D-VTR（12）か
らの再生ビデオデータはデジタル信号処理装置（プロセ
ツサ）（13）に供給される。（14）はデジタル制御信号
発生器であつて、映像利得、彩度利得、色相、セツトア
ツプ（ペデスタル）、映像位相等の各種調整器を有し、
これらの調整器の状態に対応するデジタル制御信号（制
御データ）が発生器（14）からプロセツサ（13）に供給
される。プロセツサ（13）においては、これらの制御デ
ータに応じて、ビデオデータの演算処理が行なわれる。
プロセツサ（13）で処理されたビデオデータは、ダビン
グ出力端子（15）を介して、従記録再生装置（スレーブ
装置）（２）に供給されると共に、図示を省略したD-A
変換器によりアナログ映像信号に変換され、モニタ端子
（16）を介してモニタＭに供給されて、処理結果が確認
される。In FIG. 4, (1) shows the main recording / reproducing apparatus (master apparatus) as a whole, the analog video signal from the camera CM is supplied to the input terminal (11), and the digital video data is supplied by an AD converter (not shown). Converted to D-VTR
(Recording / playback system) (12) The reproduced video data from the D-VTR (12) is supplied to a digital signal processing device (processor) (13). (14) is a digital control signal generator, which has various adjusters such as image gain, saturation gain, hue, set-up (pedestal), and image phase,
Digital control signals (control data) corresponding to the states of these regulators are supplied from a generator (14) to a processor (13). In the processor (13), arithmetic processing of video data is performed according to these control data.
The video data processed by the processor (13) is supplied to the slave recording / reproducing device (slave device) (2) through the dubbing output terminal (15) and is not shown in the figure.
It is converted into an analog video signal by the converter and is supplied to the monitor M through the monitor terminal (16) to confirm the processing result.
なお、簡単のために、色相の調整は、ビデオデータを一
旦アナログ信号に変換してアナログプロセツサによつて
行ない、調整されたアナログ映像信号を再びデジタルデ
ータに変換している。For the sake of simplicity, the hue adjustment is performed by once converting the video data into an analog signal and using an analog processor to convert the adjusted analog video signal into digital data again.
ダビングが行なわれるスレーブ装置（２）は上述のマス
タ装置（１）と同一の構成であるので、対応する各部分
の符号の10の桁の数字を２とし、１の桁の数字を同じく
して、詳細説明を省略する。Since the slave device (2) to be dubbed has the same configuration as the master device (1) described above, the numeral of 10 digit of the code of each corresponding part is set to 2 and the numeral of 1 digit is the same. The detailed description is omitted.
ところが、上述のデジタル信号処理はデジタル乗算であ
つて、量子化に起因する或程度の演算誤差が発生する。
このため、上述のように、再生側のプロセツサで信号処
理を行ないながらダビングを繰返すと、演算誤差が累積
されてしまい、例えば、利得調整の場合は波形歪とな
り、映像位相調整の場合は再生画像の左端、右端のいず
れかが欠除するというように、再生画像の品位が劣化す
るという問題があつた。However, the above-mentioned digital signal processing is digital multiplication, and a certain degree of calculation error due to quantization occurs.
For this reason, as described above, when dubbing is repeated while the signal processing is performed by the processor on the reproducing side, calculation errors are accumulated, and for example, waveform distortion occurs in the case of gain adjustment and reproduced image in the case of video phase adjustment. However, there is a problem that the quality of the reproduced image deteriorates, such that either the left end or the right end of the image is deleted.
かかる点に鑑み、本発明の目的は、ダビングによる再生
画像の品位の劣化を防止することのできる映像信号記録
再生装置を提供するところにある。In view of such a point, an object of the present invention is to provide a video signal recording / reproducing apparatus capable of preventing deterioration of quality of a reproduced image due to dubbing.
本発明は、ビデオテープレコーダ（12）からの再生映像
信号SV及び制御信号発生器（14）からの少くとも利得調
整用の制御信号Ｃを信号処理装置（13）に供給するよう
にした映像信号記録再生装置（10）において、再生映像
信号SV及び制御信号Ｃが供給される切換えスイツチ回路
（17）を設け、この切換えスイツチ回路（17）により再
生映像信号SV及び制御信号Ｃをダビング用信号として時
分割に出力するようにした映像信号記録再生装置であ
る。The present invention provides a video signal SV from a video tape recorder (12) and a control signal C from a control signal generator (14) for supplying at least a gain adjustment control signal C to a signal processing device (13). The recording / reproducing apparatus (10) is provided with a switching switch circuit (17) to which the reproduced video signal SV and the control signal C are supplied, and the switched video circuit S17 and the control signal C are used as dubbing signals by the switching switch circuit (17). This is a video signal recording / reproducing apparatus which outputs in a time division manner.
かかる構成によれば、信号処理装置を経由しない再生映
像信号がダビング用信号として得られ、ダビングによる
再生画像の品位の劣化が防止される。With this configuration, a reproduced video signal that does not pass through the signal processing device is obtained as a dubbing signal, and deterioration of the quality of the reproduced image due to dubbing is prevented.
以下、第１図〜第３図を参照しながら、本発明による映
像信号記録再生装置をD-VTRに適用した一実施例につい
て説明する。An embodiment in which the video signal recording / reproducing apparatus according to the present invention is applied to a D-VTR will be described below with reference to FIGS.
本発明の一実施例の構成を第１図に示す。この第１図に
おいて、第４図に対応する部分には同一の符号を付して
重複説明を省略する。The configuration of one embodiment of the present invention is shown in FIG. In FIG. 1, parts corresponding to those in FIG. 4 are designated by the same reference numerals, and redundant description will be omitted.
第１図において、（10）はマスタ装置を全体として示
し、D-VTR（12）の再生ビデオデータSV1がプロセツサ
（13）に供給される共に、切換えスイツチ回路（電子ス
イツチ）（17）の一方の固定接点（17a）に供給され
る。また、制御信号発生器（14）の制御データC1がプロ
セツサ（13）に供給されると共に、電子スイツチ（17）
の他方の固定接点（17b）に供給され、電子スイツチ（1
7）の可動接点（17c）は、ダビング出力端子（15）を介
して、スレーブ装置（20）の入力端子（21）は接続され
る。スレーブ装置（20）のD-VTR（22）の再生ビデオデ
ーチSV2がプロセツサ（23）に供給されると共に、電子
スイツチ（27）の一方の固定接点（27a）に供給され、D
-VTR（22）の再生制御データSCが、加算器（28）におい
て、スイツチ（29）を介してこの加算器（28）に接続さ
れる制御信号発生器（24）の制御データC2と加算され
る。加算器（28）の出力がプロセツサ（23）に供給され
ると共に、電子スイツチ（27）の他方の固定接点（27
b）に供給される。電子スイツチ（27）の可動接点（27
c）はダビング出力端子（26）に接続される。In FIG. 1, (10) shows the master device as a whole, and the reproduced video data SV 1 of the D-VTR (12) is supplied to the processor (13) and the switching switch circuit (electronic switch) (17) It is supplied to one fixed contact (17a). Further, the control data C 1 of the control signal generator (14) is supplied to the processor (13) and the electronic switch (17) is also supplied.
To the other fixed contact (17b) of the electronic switch (1b
The movable contact (17c) of 7) is connected to the input terminal (21) of the slave device (20) via the dubbing output terminal (15). The playback video data SV 2 of the D-VTR (22) of the slave device (20) is supplied to the processor (23) and also to one fixed contact (27a) of the electronic switch (27), and D
-In the adder (28), the reproduction control data SC of the VTR (22) is added to the control data C 2 of the control signal generator (24) connected to this adder (28) via the switch (29). To be done. The output of the adder (28) is supplied to the processor (23) and the other fixed contact (27) of the electronic switch (27) is also supplied.
supplied to b). Moving contact (27) of the electronic switch (27)
c) is connected to the dubbing output terminal (26).
本実施例の動作は次のとおりである。The operation of this embodiment is as follows.
デジタル制御信号発生器（14）は、例えば第２図に示す
ように、それぞれ16ビツトの映像利得制御データDVG、
彩度利得制御データDCG及び色相制御データDHU並びにそ
れぞれ８ビツトのセツトアツプ制御データDSU及び映像
位相制御データDVP等の各種の制御データと、これら制
御データの有無を示すそれぞれ１ビツトのフラグとを発
生する。The digital control signal generator (14) is, for example, as shown in FIG. 2, 16-bit video gain control data D VG ,
Various control data such as saturation gain control data D CG, hue control data D HU , set-up control data D SU and video phase control data D VP of 8 bits each, and a 1-bit flag indicating the presence or absence of these control data And generate.
デジタルテレビジヨン方式においては、各垂直ブランキ
ング期間毎に始めの数ラインが補助データ用とされてい
るので、この間、電子スイツチ（17）は図示とは逆の接
続状態とされ、上述の各種制御データがダビング出力端
子（15）からスレーブ装置（20）のD-VTR（22）に供給
されて、第３図のD1〜D3に示すように、補助データライ
ンの１つに、例えば３回以上の繰返して記録され、ドロ
ツプアウト等による誤りの発生が防止される。In the digital television system, the first few lines are used for auxiliary data in each vertical blanking period, so during this period, the electronic switch (17) is in the connection state opposite to that shown in the figure, and the above-mentioned various controls are performed. Data is supplied from the dubbing output terminal (15) to the D-VTR (22) of the slave device (20), and as shown by D 1 to D 3 in FIG. It is recorded repeatedly more than once, and the occurrence of errors due to dropouts, etc. is prevented.
各フイールドのビデオデータ記録期間には、電子スイツ
チ（17）が図示の接続状態となり、マスタ装置（10）の
再生ビデオデータSV1は、従来にようにプロセツサ（1
3）を経由することなく、ダビング出力端子（16）から
スレーブ装置（20）D-VTR（22）に供給され、記録され
る。During the video data recording period of each field, the electronic switch (17) is connected as shown in the figure, and the reproduced video data SV 1 of the master device (10) is processed by the processor (1
It is supplied from the dubbing output terminal (16) to the slave device (20) D-VTR (22) and recorded without going through 3).
スレーブ装置（20）において、プロセツサ（23）にはD-
VTR（22）からの再生ビデオデータSV2が直接に供給され
る共に、加算器（28）を介して、再生制御データSCが供
給されており、スイツチ（29）が開放された状態では、
プロセツサ（23）は再生ビデオデータSV2に対してマス
タ装置（10）のプロセツサ（13）と全く同一の演算処理
を行なう。この再生ビデオデータSV2はD-VTR（22）に供
給されたマスタ装置（10）の再生ビデオデータSV1と異
なるところがないので、プロセツサ（25）の出力はマス
タ装置（10）のプロセツサ（13）の出力と同一となる。In the slave device (20), the processor (23) has D-
In the state where the reproduction video data SV 2 from the VTR (22) is directly supplied and the reproduction control data SC is supplied through the adder (28) and the switch (29) is opened,
The processor (23) performs exactly the same arithmetic processing on the reproduced video data SV 2 as the processor (13) of the master device (10). Since this reproduced video data SV 2 is no different from the reproduced video data SV 1 of the master device (10) supplied to the D-VTR (22), the output of the processor (25) is the processor (13) of the master device (10). ) Output is the same.
また、スイツチ（29）が閉成された状態では、制御信号
発生器（24）の制御データC2と再生制御データSCとが加
算されてプロセツサ（23）に供給されるので、プロセッ
サ（23）においてプロセッサ（13）におけるものとは異
なる新な演算処理が行なわれる。Further, when the switch (29) is closed, the control data C 2 of the control signal generator (24) and the reproduction control data SC are added and supplied to the processor (23), so that the processor (23) In, new arithmetic processing different from that in the processor (13) is performed.
上述のように、本実施例においては、D-VTRの未処理の
再生ビデオデータを直接にダビング出力端子に供給する
と共に、制御データを時分割で同じダビング出力端子に
供給するようにしたので、複数回のダビングを行なつて
も、累積演算誤差により再生画像の品位が劣化すること
がなく、原画像を忠実に再現することができる。As described above, in this embodiment, the unprocessed reproduced video data of the D-VTR is directly supplied to the dubbing output terminal, and the control data is time-divisionally supplied to the same dubbing output terminal. Even if the dubbing is performed a plurality of times, the quality of the reproduced image does not deteriorate due to the accumulated calculation error, and the original image can be faithfully reproduced.
以上、D-VTRについて説明したが、本発明をアナログVTR
に適用した場合、例えば、ダビング時の映像利得の変化
を除去することができて、再生画像の品位の劣化を防止
することができる。なお、この場合、制御信号は、後え
ば垂直帰線期間に適宜記録される。The D-VTR has been described above, but the present invention is an analog VTR.
When applied to, it is possible, for example, to eliminate the change in the video gain during dubbing and prevent the deterioration of the quality of the reproduced image. In this case, the control signal is appropriately recorded later in the vertical blanking period.
以上詳述のように、本発明によれば、再生映像信号と制
御信号を時分割により出力するようにしたので、ダビン
グによる再生画像の品位の劣化を防止することができ
る。As described above in detail, according to the present invention, since the reproduced video signal and the control signal are output in a time division manner, it is possible to prevent deterioration of the quality of the reproduced image due to dubbing.
第１図は本発明による映像信号記録再生装置の一実施例
の構成を示すブロック図、第２図及び第３図は本発明の
一実施例の制御信号のフオーマツトを示す線図及び波形
図、第４図は従来の映像信号記録再生装置の構成例を示
すブロツク図である。 （12）はビデオテープレコーダ、（13）は信号処理装
置、（14）は制御信号発生器、（17）は切換えスイツチ
回路、Ｃは制御信号、SVは再生映像信号である。FIG. 1 is a block diagram showing a configuration of an embodiment of a video signal recording / reproducing apparatus according to the present invention, and FIGS. 2 and 3 are diagrams and waveform diagrams showing a format of a control signal of an embodiment of the present invention. FIG. 4 is a block diagram showing a configuration example of a conventional video signal recording / reproducing apparatus. (12) is a video tape recorder, (13) is a signal processing device, (14) is a control signal generator, (17) is a switching switch circuit, C is a control signal, and SV is a reproduced video signal.
Claims (1)
及び制御信号発生器からの少くとも利得調整用の制御信
号を信号処理装置に供給するようにした映像信号記録再
生装置において、 上記再生映像信号及び上記制御信号が供給される切換え
スイツチ回路を設け、 該切換えスイツチ回路により上記再生映像信号及び上記
制御信号をダビング用信号として時分割に出力するよう
にしたことを特徴とする映像信号記録再生装置。1. A video signal recording / reproducing apparatus adapted to supply a reproduction video signal from a video tape recorder and a control signal for gain adjustment from a control signal generator to a signal processing apparatus. A video signal recording / reproducing apparatus, characterized in that a switching switch circuit to which the control signal is supplied is provided, and the switching video circuit outputs the reproduced video signal and the control signal as a dubbing signal in a time division manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60166108A JPH0677387B2 (en) | 1985-07-27 | 1985-07-27 | Video signal recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60166108A JPH0677387B2 (en) | 1985-07-27 | 1985-07-27 | Video signal recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6226681A JPS6226681A (en) | 1987-02-04 |
| JPH0677387B2 true JPH0677387B2 (en) | 1994-09-28 |
Family
ID=15825165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60166108A Expired - Lifetime JPH0677387B2 (en) | 1985-07-27 | 1985-07-27 | Video signal recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0677387B2 (en) |
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-
1985
- 1985-07-27 JP JP60166108A patent/JPH0677387B2/en not_active Expired - Lifetime
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Also Published As
| Publication number | Publication date |
|---|---|
| JPS6226681A (en) | 1987-02-04 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |