JPS60229480A - Video tape recorder - Google Patents
Video tape recorderInfo
- Publication number
- JPS60229480A JPS60229480A JP59083758A JP8375884A JPS60229480A JP S60229480 A JPS60229480 A JP S60229480A JP 59083758 A JP59083758 A JP 59083758A JP 8375884 A JP8375884 A JP 8375884A JP S60229480 A JPS60229480 A JP S60229480A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- character
- mixed
- character signal
- circuit
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
- H04N5/9305—Regeneration of the television signal or of selected parts thereof involving the mixing of the reproduced video signal with a non-recorded signal, e.g. a text signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はビデオテープレコーダ（以下■几と略−ｆ’）
の操作モード例えば、記録、停止、再生等の動作状態及
び受信チャンネル、テープカウンタ、タイマー表示等を
、’ｖ’ｒｇの出力信号をモニタするモニタバのスクリ
ーン上で表示するよう構成したＶＴ）Ｌ Ｉｃ関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a video tape recorder (hereinafter referred to as ■几 and -f').
The operating mode of the VT)L Ic is configured to display the operation status such as recording, stop, playback, reception channel, tape counter, timer display, etc. on the screen of the monitor bar that monitors the output signal of the 'v'rg. related.
従来のＶＴＲにおいて、その操作状態、もしくはタイマ
表示、テープカウンタ表示等をモニターＴＶのスクリー
ン上で表示する場合第３図に示すように、記録時にはチ
ューナ２で復調されたビデオ信号、再生時には再生回路
５で復調されたビデオ信号が、スイッチ６を介し文字信
号加算回路７で、文字信号発生器１０で得た文字信号と
混合される。混合された信号は、増巾器８を介したのち
ビデオ信号をＴＶ電波信号罠変換するＷ変調器９に供給
され、ＴＶ電波信号として出力端１２に出力される。こ
こでモニターＷ上で文字信号を表示するには、ビデオ信
号が最大０００−白レベルが入力された場合でも文字信
号が判別できるようその１００％白信号レベルよりも大
きく選ぶ必要がある。しかしそのレベルが過大になると
ビデオ信号をＴＶ電波信号に変換するＲＦ変ｉｌｌ器で
遊脚となりその過変調信号をＴＶモニターで受信した際
音声信号に妨害をあたえ音声バズとなり異常音を発生す
る。これら妨害が発生しないよう、又文字信号が判別で
きるようにするためビデオ信号の１００−白信号より数
チ高めに文字信号レベルを設定する必要があるため、文
字信号レベルを調整する可変抵抗器１１が設けられてい
る。このため従来の文字表示機能のなかったＶＴＲに比
べ調整手順が増加するため生産工程におけるコストが増
加する欠点があった。In a conventional VTR, when displaying the operating status, timer display, tape counter display, etc. on the screen of a monitor TV, as shown in Figure 3, the video signal demodulated by the tuner 2 during recording, and the playback circuit during playback. The video signal demodulated in step 5 is mixed with the character signal obtained by character signal generator 10 in character signal addition circuit 7 via switch 6. The mixed signal passes through an amplifier 8 and then is supplied to a W modulator 9 that converts the video signal into a TV radio signal, and is outputted to an output terminal 12 as a TV radio signal. In order to display a character signal on the monitor W, it is necessary to select a video signal higher than the 100% white signal level so that the character signal can be distinguished even when the maximum 000-white level is input. However, when the level becomes excessive, the RF transformer that converts the video signal into a TV radio wave signal becomes idle, and when the overmodulated signal is received by a TV monitor, it interferes with the audio signal, creating an audio buzz and producing abnormal noise. In order to prevent these interferences and to make the character signal distinguishable, it is necessary to set the character signal level several orders of magnitude higher than the 100-white signal of the video signal, so the variable resistor 11 is used to adjust the character signal level. is provided. For this reason, there is a drawback that the adjustment procedure is increased compared to conventional VTRs that do not have a character display function, which increases costs in the production process.
本発明の目的は、例えば前述したように新機能である文
字信号によるＶＴＲの操作状態、受信チャンネル、タイ
マー、カウンター等の表示を行なう回路を追加しても、
■−の生産工程の増加量を少なくするようにして、コス
ト低減化をはかることにある。The object of the present invention is that even if a circuit is added to display the operating status of the VTR, reception channel, timer, counter, etc. using new functions such as character signals as described above,
(2) The goal is to reduce costs by reducing the amount of increase in the production process.
文字信号を混合したビデオ信号をＴＶ電波信号に交換す
る際、その変換器の可変調器は、ビデオ信号の過大か九
より過変調となる。その過変調信号をモニターＷで受信
すると音声バズとなり異常音が発生する。この発生を防
ぐため混合する文字信号のレベルを調整することなくあ
る一定レベルに抑圧するように構成した。When a video signal mixed with a character signal is exchanged into a TV radio signal, the variable modulator of the converter over-modulates the video signal. When the overmodulated signal is received by the monitor W, an audio buzz occurs and an abnormal sound is generated. In order to prevent this from occurring, the system is configured to suppress the level of the mixed character signal to a certain level without adjusting it.
以下本発明の実施例を第１図により説明する。 Embodiments of the present invention will be described below with reference to FIG.
同図において記録時にはテエーナ２で復調されたビデオ
信号、再生時には再生回路５で復調されたビデオ信号が
、スイッチ６を介し文字信号加算回路７で文字信号発生
器■で得た文字信号と混合される。混合された信号はダ
イオードＤ、。In the figure, during recording, the video signal demodulated by the TENA 2, and during playback, the video signal demodulated by the reproduction circuit 5 is mixed with the character signal obtained by the character signal generator ■ in the character signal addition circuit 7 via the switch 6. Ru. The mixed signal is passed through diode D,.
抵抗Ｒ，，Ｒ１，Ｈ，及びコンデンサＣ１で構成したク
リップ回路で文字信号レベルが過大にならないよう抑圧
したのち増巾器８を介し、可変１！ｉ６９に供給されＴ
Ｖ電波信号として出力ｙａ１２［出力される。After suppressing the character signal level so that it does not become excessive with a clip circuit composed of resistors R, , R1, and H and a capacitor C1, a variable 1! T supplied to i69
Output ya12 [is output as a V radio signal.
本発８ＡＶｃおけるクリップ設定レベルは、１００チの
ビデオ信号が入力されても文字信号が判別できる事と可
変調器が過変調にならないことを条件におよそ１２０％
に設定しである。その信号レベルを第２図に示す
〔発明の効果〕
以上述べた本発明によれば、文字信号を混合したのち過
大信号をクリップ回路である一定レベルに抑圧するよう
に構成しであるため混合すべく文字信号の混合レベルを
１４整する必要がなく生産工程を少なくすることができ
コスト低減がはかれる。The clip setting level for this 8AVc is approximately 120%, provided that the character signal can be distinguished even if a 100-inch video signal is input, and that the variable modulator does not overmodulate.
It is set to . The signal level is shown in FIG. 2. [Effects of the Invention] According to the present invention described above, the structure is such that after mixing character signals, excessive signals are suppressed to a certain level by a clip circuit, so that mixing is not possible. There is no need to adjust the mixing level of character signals to 14, which reduces the number of production steps and reduces costs.
又、部品単価でみてもクリップ回路は、ダイオード１ヶ
、抵抗３ヶ、コンデンサ１ケで構成できるので半固定抵
抗と同等のコストで実施することができる。Also, in terms of component costs, the clip circuit can be constructed with one diode, three resistors, and one capacitor, so it can be implemented at the same cost as a semi-fixed resistor.
第１図は本発明の一実施例を示すブロック図、第２図は
本発明の説明に供する信号レベルを示す図、第５図は従
来例を示すブロック図である。
１・・・アンテナ ２・・・チューナ
５・・・映像記録回路 ４・・・ビデオヘッド５・・・
映像再生回路 ６・・・記録再生切換スイッチ７・・・
混合回路 ８・・・増巾器
９・・伺」変調器 １ｏ・・・文字信号発生器１１・・
・半固定抵抗 １５・・・クリップ回路（Ｒ。
Ｅ、、Ｒ，・・・固定抵抗、ＤＩ・・・ダイオードＩ
Ｃ，・・・コンデンサ）FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing signal levels for explaining the present invention, and FIG. 5 is a block diagram showing a conventional example. 1...Antenna 2...Tuner 5...Video recording circuit 4...Video head 5...
Video playback circuit 6... Recording/playback selector switch 7...
Mixing circuit 8...Amplifier 9...Modulator 1o...Character signal generator 11...
・Semi-fixed resistance 15...Clip circuit (R.E,,R,...Fixed resistance, DI...Diode I
C, ... capacitor)
Claims (1)
ＮＩ′波の受信チャンネル、及びタイマーの時刻等の表
示をモニターテレビの画面上に文字表示するための文字
信号発生回路、その文字信号を化カビチオ信号に加算す
る回路、及び加算された表示文字信号の加算レベルが過
大にならないよう罠抑圧する回路を有したビデオテープ
レコーダ。Operation modes such as recording, playback, fast forward 9, etc., television'
A character signal generation circuit for displaying the NI' wave reception channel and timer time on the monitor TV screen, a circuit for adding the character signal to the Bakavichio signal, and the added display character signal A video tape recorder having a trap suppression circuit to prevent the addition level from becoming excessive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59083758A JPS60229480A (en) | 1984-04-27 | 1984-04-27 | Video tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59083758A JPS60229480A (en) | 1984-04-27 | 1984-04-27 | Video tape recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60229480A true JPS60229480A (en) | 1985-11-14 |
Family
ID=13811456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59083758A Pending JPS60229480A (en) | 1984-04-27 | 1984-04-27 | Video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60229480A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05210963A (en) * | 1992-01-30 | 1993-08-20 | Sony Corp | Recording and reproducing device |
| US6538703B1 (en) | 1998-03-27 | 2003-03-25 | Funai Electric Co., Ltd. | Video processing circuit |
-
1984
- 1984-04-27 JP JP59083758A patent/JPS60229480A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05210963A (en) * | 1992-01-30 | 1993-08-20 | Sony Corp | Recording and reproducing device |
| US6538703B1 (en) | 1998-03-27 | 2003-03-25 | Funai Electric Co., Ltd. | Video processing circuit |
| US6765627B2 (en) * | 1998-03-27 | 2004-07-20 | Funai Electric Co., Ltd. | Video processing circuit for processing character signals |
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