JPH0628865Y2 - Image file playback circuit - Google Patents
Image file playback circuitInfo
- Publication number
- JPH0628865Y2 JPH0628865Y2 JP1983030262U JP3026283U JPH0628865Y2 JP H0628865 Y2 JPH0628865 Y2 JP H0628865Y2 JP 1983030262 U JP1983030262 U JP 1983030262U JP 3026283 U JP3026283 U JP 3026283U JP H0628865 Y2 JPH0628865 Y2 JP H0628865Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- masking
- address
- input
- reproduction
- 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)
Description
【考案の詳細な説明】 (イ)産業上の利用分野 本考案は、ディスク面に静止画を同心円状に記録する画
像ファイルの再生回路に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a reproduction circuit for an image file that concentrically records a still image on a disk surface.
(ロ)従来技術 光学式の画像ファイルは、直径３０cmのディスク面に約
３万枚（３万フレーム）以上の静止画を記録可能にして
いる。記録される静止画は、記録位置を特定する必要が
あり、再生時にも位置を指定して画像を再生する必要が
ある。そこで、静止画像にはアドレス信号が付される。
このアドレス信号は、通常映像信号の第１７Ｈと第１８
Ｈ及び第２８０Ｈと第２８１Ｈの垂直帰線区間に付され
ている（第２図参照）。このアドレス信号は、静止画の
記録位置を特定するため、予めディスクの径方向に先行
する水平同期信号と共にＦＭ変調記録されており、その
記録部Ｄａは第１図に示す様に、ディスクの径方向に揃
列せしめられている。(B) Prior art Optical image files can record more than 30,000 still images (30,000 frames) on a disc surface having a diameter of 30 cm. It is necessary to specify the recording position of a still image to be recorded, and it is necessary to specify the position when reproducing the image. Therefore, an address signal is added to the still image.
This address signal corresponds to the 17th and 18th normal video signals.
It is attached to the vertical retrace line sections of H and 280H and 281H (see FIG. 2). This address signal is FM-modulated and recorded together with the horizontal synchronizing signal preceding it in the radial direction of the disc in order to identify the recording position of the still image, and its recording portion Da has a disc diameter of the disc as shown in FIG. They are lined up in the same direction.
そこで、画像ファイルは記録に際し、映像信号の第１７
Ｈと第１８Ｈがディスクのアドレス信号記録部に一致す
る様にディスクの回路制御を為し、アドレス信号記録部
を除いて、映像信号をＦＭ変調記録している。Therefore, when recording the image file, the 17th
The circuit control of the disk is performed so that H and 18H coincide with the address signal recording section of the disk, and the video signal is FM-modulated and recorded except the address signal recording section.
しかし、記録時のディスクの回転位相を映像信号に対し
て完全に一致せしめることは困難であり、映像信号とア
ドレス信号とは位相が不連続のまま記録される。従っ
て、映像信号の水平同期信号と、アドレス信号の水平同
期信号はその位相が不連続となり、再生画像を映出する
テレビジョン受像機は垂直ブランキング部分に於ける水
平偏向の乱れにより、画面上部に画像の乱れを来す。そ
こで、この乱れを解消するため、アドレス信号記録部分
には水平同期信号を記録しない様にすることも考えられ
るが、ディジタル信号より成るアドレス信号を読出すた
めに通常同期クランプ回路が利用されるため、水平同期
信号を除くことは望ましくない。However, it is difficult to completely match the rotational phase of the disk during recording with the video signal, and the video signal and the address signal are recorded with the phases being discontinuous. Therefore, the phase of the horizontal synchronizing signal of the video signal and the horizontal synchronizing signal of the address signal become discontinuous, and the television receiver displaying the reproduced image has a disturbance in the horizontal deflection in the vertical blanking portion, which causes the upper portion of the screen. The image is disturbed. Therefore, in order to eliminate this disturbance, it may be considered that the horizontal synchronizing signal is not recorded in the address signal recording portion, but since the normal synchronizing clamp circuit is used to read the address signal composed of the digital signal. , Excluding the horizontal sync signal is not desirable.
(ハ)考案の目的 そこで、本考案は、上述する点に鑑み、テレビジョン受
像機の水平同期乱れを解消した新規且つ有効な画像ファ
イルの再生回路を提案するものである。(C) Object of the Invention In view of the above points, the present invention proposes a new and effective image file reproducing circuit which eliminates the horizontal synchronization disturbance of the television receiver.
(ニ)考案の構成 本考案は、アドレス記録部をマスクした再生映像信号を
テレビジョン受像機に供給すべく構成することを特徴と
するものである。(D) Configuration of the Invention The present invention is characterized in that it is configured to supply the reproduced video signal with the address recording section masked to the television receiver.
(ホ)実施例 以下、本考案を図示せる一実施例に従い説明する。本実
施例は、アドレス信号に対する映像信号の位相変動が高
々±１Ｈ程度であろうとの判断により第１６Ｈ〜第１９
Ｈをマスクすると共に、このマスク部分に映像信号中の
水平同期信号に同期する同期発振出力を導出せしめるも
のである。(E) Embodiment Hereinafter, the present invention will be described with reference to an embodiment. In this embodiment, it is judged that the phase fluctuation of the video signal with respect to the address signal is about ± 1H at most, and the 16th to 19th phases are performed.
In addition to masking H, the synchronous oscillation output synchronized with the horizontal synchronizing signal in the video signal can be derived from this mask portion.
第３図は、本実施例の要部回路ブロック図を示し、第４
図は、その要部波形説明図を示す。本実施例では、再生
モードで指定されたアドレスをピックアップがアクセス
走査し、所望の記録トラックを再生する。再生出力はＦ
Ｍ復調回路(1)にて復調され、再生映像信号と再生アド
レス信号（第４図Ｖ１参照）が、同期分離回路(3)とス
イッチング回路(2)に入力される。同期分離された水平
同期信号（ＨＤ）と垂直同期信号（ＶＤ）は、マスキン
グ信号発生回路(4)に入力され、垂直同期信号（ＶＤ）
を起点に第１６Ｈ（又は第２７９Ｈ）より約４Ｈ分に相
当する時間幅のマスキング信号(M)を導出する。よって
このマスキング信号発生期間中にアドレス信号が含まれ
ることになる。水平同期信号（ＨＤ）とマスキング信号
(M)とをノア回路(5)に入力することにより得られる映像
信号中の水平同期信号は、同期発生回路(6)に入力さ
れ、映像信号中の水平同期信号に連続する水平同期信号
が前記スイッチング回路(2)に入力される。マスキング
信号(M)をスイッチング制御入力とする前記スイッチン
グ回路(2)は、マスキング信号発生期間中にのみＦＭ復
調出力に代わる同期発振出力を切換導出することにな
り、スイッチング出力（Ｖ２）の水平同期信号は連続
し、アドレス信号はマスクされる。よって、このスイッ
チング出力（Ｖ２）をテレビジョン受像機に供給すれ
ば、安定な静止画像を映出することができる。FIG. 3 shows a block diagram of the main circuit of this embodiment, and FIG.
The figure shows the waveform explanatory diagram of the main part. In this embodiment, the pickup access scans the address designated in the reproduction mode and reproduces a desired recording track. Playback output is F
The reproduction video signal and the reproduction address signal (see V1 in FIG. 4) demodulated by the M demodulation circuit (1) are input to the sync separation circuit (3) and the switching circuit (2). The horizontal sync signal (HD) and the vertical sync signal (VD), which have been sync-separated, are input to the masking signal generation circuit (4), and the vertical sync signal (VD) is input.
From the starting point, a masking signal (M) having a time width corresponding to about 4H is derived from the 16th H (or 279H). Therefore, the address signal is included in this masking signal generation period. Horizontal sync signal (HD) and masking signal
The horizontal synchronization signal in the video signal obtained by inputting (M) and NOR circuit (5) is input to the synchronization generation circuit (6), and the horizontal synchronization signal continuous to the horizontal synchronization signal in the video signal is It is input to the switching circuit (2). The switching circuit (2) having the masking signal (M) as a switching control input switches and derives the synchronous oscillation output instead of the FM demodulation output only during the masking signal generation period, and the horizontal synchronization of the switching output (V2). The signals are continuous and the address signals are masked. Therefore, if this switching output (V2) is supplied to the television receiver, a stable still image can be displayed.
(ヘ)考案の効果 よって、本考案によれば、アドレス信号記録部の不連続
な水平同期信号は、テレビジョン受像機に入力されず、
安定な静止画を再生することができその効果は大であ
る。(F) As a result of the invention, according to the invention, the discontinuous horizontal synchronizing signal of the address signal recording section is not input to the television receiver,
A stable still image can be reproduced, and its effect is great.
第１図は記録前のディスクの模式的説明図、第２図はア
ドレス信号波形説明図、第３図は本考案の一実施例回路
ブロック図、第４図は同要部波形説明図をそれぞれ示
す。 主な図番の説明 (3)…同期分離回路、(2)…スイッチング回路、(4)…マ
スキング信号発生回路FIG. 1 is a schematic explanatory view of a disc before recording, FIG. 2 is an explanatory diagram of address signal waveforms, FIG. 3 is a circuit block diagram of an embodiment of the present invention, and FIG. Show. Description of main drawing numbers (3)… Synchronous separation circuit, (2)… Switching circuit, (4)… Masking signal generation circuit
Claims (1)
をアドレス記録部に予め記録して成るディスクに、前記
アドレス記録部を除いて１フレーム分の映像信号を同心
円状記録トラックとして形成し、再生時前記記録トラッ
クを再生して静止画像をテレビジョン受像機に映出せし
める画像ファイルに於て、 再生映像信号中の垂直同期信号を起点として水平同期信
号を計数しアドレス記録部の再生タイミングを含むマス
キング信号を発生するマスキング信号発生回路と、 マスキング期間外の水平同期信号に同期する水平同期信
号を形成導出する同期発生回路と、 再生アドレス信号を含む再生映像信号を一入力とし、前
記同期発生回路より得られる水平同期信号を他入力と
し、前記マスキング信号を制御入力としてマスキング期
間中に前記一入力に代えて他入力を選択導出するスイッ
チング回路とを 配することを特徴とする画像ファイルの再生回路。1. A disc in which an address signal is recorded in advance in an address recording section together with a preceding horizontal synchronizing signal, a video signal for one frame is formed as a concentric circular recording track except for the address recording section, and at the time of reproduction. In an image file for reproducing a still image on a television receiver by reproducing the recording track, the horizontal synchronizing signal is counted from the vertical synchronizing signal in the reproduced video signal as a starting point, and masking including the reproduction timing of the address recording section is performed. A masking signal generating circuit for generating a signal, a sync generating circuit for forming and deriving a horizontal synchronizing signal synchronized with a horizontal synchronizing signal outside the masking period, and a reproduction video signal including a reproduction address signal as one input, The obtained horizontal synchronization signal is used as another input, and the masking signal is used as a control input to input the one signal during the masking period. Reproducing circuit of the image file, characterized by distributing a switching circuit for selecting derive other input instead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983030262U JPH0628865Y2 (en) | 1983-03-01 | 1983-03-01 | Image file playback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983030262U JPH0628865Y2 (en) | 1983-03-01 | 1983-03-01 | Image file playback circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59137678U JPS59137678U (en) | 1984-09-13 |
| JPH0628865Y2 true JPH0628865Y2 (en) | 1994-08-03 |
Family
ID=30161123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983030262U Expired - Lifetime JPH0628865Y2 (en) | 1983-03-01 | 1983-03-01 | Image file playback circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0628865Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058635B2 (en) * | 1977-03-04 | 1985-12-20 | 三菱電機株式会社 | information reproducing device |
| JPS5463743A (en) * | 1977-10-31 | 1979-05-22 | Hitachi Ltd | Synchronous reproducer of recorder-reproducer |
-
1983
- 1983-03-01 JP JP1983030262U patent/JPH0628865Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59137678U (en) | 1984-09-13 |
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