JPS63149836A - Optical recording disk reproducing device - Google Patents

Optical recording disk reproducing device

Info

Publication number
JPS63149836A
JPS63149836A JP29695486A JP29695486A JPS63149836A JP S63149836 A JPS63149836 A JP S63149836A JP 29695486 A JP29695486 A JP 29695486A JP 29695486 A JP29695486 A JP 29695486A JP S63149836 A JPS63149836 A JP S63149836A
Authority
JP
Japan
Prior art keywords
servo
pickup
recording disk
optical recording
disturbed
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
Application number
JP29695486A
Other languages
Japanese (ja)
Inventor
Tetsuya Itani
哲也 井谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP29695486A priority Critical patent/JPS63149836A/en
Publication of JPS63149836A publication Critical patent/JPS63149836A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions

Abstract

PURPOSE:To decrease irregularity in a reproduced picture even if servo is disordered by outputting a video signal stored in a storage means during the time when a control means is returning a pickup to the position where the servo is disordered. CONSTITUTION:A video signal stored in a high-density recording disk 11 is reproduced through the pickup 12 and a video signal reproduction circuit 14, and supplied to a memory 16 and a switch 19. The switch 19, normally, is set in the circuit 14-side to output a video signal from a terminal 20. If a focus servo is disordered by an external shock, a defocusing detection circuit 17 informs a pickup position control circuit 18 of said disordering happened and its position. The circuit 18 transmits the optical beam from the pickup 12 to the position where the servo is disordered, and restart the reproduction from this position. During the process of said sequence, the switch 19 is set to a memory 16-side, to output the video information at a place immediately prior to said position of defocusing stored in the memory 16 to the terminal 20.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、光学式記録円盤再生装置の外来ショック等に
よる再生画面の乱れを保護する技術に関するものである
。。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a technique for protecting an optical recording disk reproducing apparatus from disturbances in the reproduction screen due to external shocks or the like. .

従来の技術 近年、光学式記録円盤はコンパクトディスクやレーザー
ビジコンなどとして普及している。特に映像信号と音声
信号とを再生する高密度記録円盤再生装置は半導体メモ
リの低価格化にともなって様々な応用が考え出され、ま
た、その使用環境も多岐に渡り、よシ安価で、外来ショ
ック等による再生画面の乱れの少ない光学式記録円盤再
生装置の市場導入が望まれている。BACKGROUND OF THE INVENTION In recent years, optical recording disks have become popular as compact disks, laser videocons, and the like. In particular, high-density recording disk playback devices that play back video and audio signals have been developed into a variety of applications as the cost of semiconductor memory has fallen. It is desired to introduce into the market an optical recording disc playback device that causes less disturbance of the playback screen due to shocks and the like.

以下、図面を参照しながら上述した従来の光学式記録円
盤再生装置の一例について説明する。An example of the conventional optical recording disk reproducing apparatus described above will be described below with reference to the drawings.

第２図は、従来の光学式記録円盤再生装置の構成を示す
ブロック図である。図において１は高密度記録円盤、２
はピックアップ、３はスピンドルモータ、４は映像信号
再生回路、６はサーボ回路、６は出力端子である。FIG. 2 is a block diagram showing the configuration of a conventional optical recording disk reproducing apparatus. In the figure, 1 is a high-density recording disk, 2
3 is a pickup, 3 is a spindle motor, 4 is a video signal reproducing circuit, 6 is a servo circuit, and 6 is an output terminal.

以上のように構成された従来の光学式記録円盤再生装置
について以下にその再生動作の説明をする。The reproducing operation of the conventional optical recording disk reproducing apparatus configured as described above will be explained below.

高密度記録円盤１に記録されている映像信号をピックア
ップ２が電気的信号に変換する。映像信号再生回路４は
、その電気的信号を映像信号に変換する働きをする。再
生された映像信号は端子６よシ出力される。サーボ回路
５はピックアップ２の光学ビームを正確に高密度記録円
盤１に設けられた信号トラックに照射させる働きをし、
スピンドルモータ３は正確な再生速度になるように高密
度記録円盤１を回転させる。A pickup 2 converts a video signal recorded on a high-density recording disk 1 into an electrical signal. The video signal reproducing circuit 4 functions to convert the electrical signal into a video signal. The reproduced video signal is outputted from the terminal 6. The servo circuit 5 functions to accurately irradiate the optical beam of the pickup 2 onto the signal track provided on the high-density recording disk 1.
A spindle motor 3 rotates the high-density recording disk 1 to achieve an accurate reproduction speed.

発明が解決しようとする問題点 しかしながら元来、光学式高密度記録円盤再生装置では
、高密度記録円盤に非接触で信号を再生するため、外来
ショック等でサーボが乱された時信号が正確に再生され
ない。よって上記の様な構成では、外来ショック等によ
り再生画面が乱れるという欠点があった。Problems to be Solved by the Invention However, optical high-density recording disk reproducing devices originally reproduce signals without contacting the high-density recording disk, so even if the servo is disturbed by an external shock, the signal cannot be accurately reproduced. Not played. Therefore, the above configuration has the drawback that the playback screen is disturbed by external shocks and the like.

問題点を解決するための手段 上記問題点を解決するため１本発明の光学式記録円盤再
生装置は、映像情報を記録した光学式記録円盤に光学ビ
ームを照射して記録情報を電気信号に変換するピンクア
ンプと、ピックアップの対物レンズをフォーカス方向と
トラック方向に動かして光学式記録円盤に正確に光学ビ
ームを照射するサーボ装置と、ピックアップによシ得ら
れた電気信号を映像信号に再生する再生装置と、再生さ
れた映像情報を格納する記憶手段と、再生された映像情
報を出力する出力端子と、ピックアップが光学式記録円
盤を再生中にサーボが乱されたことを検出する検出手段
と、検出手段がサーボの乱された事を検出した後にサー
ボの乱された位置ヘビックアッグを戻す制御手段と、検
出手段がサーボが乱されたことを検出しない時には映像
情報を記憶手段に格納し、制御手段がサーボの乱された
位置へピックアップを戻している間、再生信号の代わり
に記憶手段に格納された映像情報を出力端子に出力する
手段を備える。Means for Solving the Problems In order to solve the above problems, the optical recording disk reproducing apparatus of the present invention converts the recorded information into an electrical signal by irradiating an optical beam onto an optical recording disk on which video information is recorded. A servo device that moves the objective lens of the pickup in the focus direction and track direction to accurately irradiate the optical recording disk with an optical beam, and a playback device that regenerates the electrical signal obtained by the pickup into a video signal. a device, a storage means for storing reproduced video information, an output terminal for outputting the reproduced video information, a detection means for detecting that the servo is disturbed while the pickup is reproducing the optical recording disk; a control means for returning the disturbed position of the servo after the detection means detects that the servo is disturbed; and a control means for storing video information in the storage means when the detection means does not detect that the servo is disturbed; The apparatus is provided with means for outputting video information stored in the storage means to an output terminal instead of the reproduction signal while the pickup is returned to the position where the servo was disturbed.

作　　用 本発明は、上記した構成によシ、外来ショック等によシ
サーボが乱された時、ピックアップの光学ビームをサー
ボが乱される直前の位置へ移動させ、かつその期間にも
その位置における再生画像を出力端子に出力し、再生画
面の乱れを少なくするようにしたものである。According to the above-described structure, when the servo is disturbed due to an external shock, the optical beam of the pickup is moved to the position immediately before the servo is disturbed, and during that period, the optical beam is moved to the position immediately before the servo is disturbed. The reproduced image is output to an output terminal to reduce disturbances on the reproduced screen.

実施例 以下、本発明の一実施例の光学式記録円盤再生装置につ
いて、図面を参照しながら説明する。EXAMPLE Hereinafter, an optical recording disk reproducing apparatus according to an example of the present invention will be described with reference to the drawings.

第１図は、本発明の一実施例の光学式記録円盤再生装置
の１・Ｎ成を示すブロック図である。図において１１は
高密度記録円盤、１２はピックアップ、１３はスピンド
ルモータ、１４は映像信号再生回路、１６はサーボ回路
、１６はメモリ、１７はフォーカスはずれ検出回路、１
８はピックアップ位置制御回路、１９はスイッチ、２０
は端子である。FIG. 1 is a block diagram showing a 1/N configuration of an optical recording disk reproducing apparatus according to an embodiment of the present invention. In the figure, 11 is a high-density recording disk, 12 is a pickup, 13 is a spindle motor, 14 is a video signal reproducing circuit, 16 is a servo circuit, 16 is a memory, 17 is an out-of-focus detection circuit, 1
8 is a pickup position control circuit, 19 is a switch, 20
is a terminal.

以上のように構成された本発明の一実施例の光学式記録
円盤再生装置について以下にその動作を説明する。The operation of the optical recording disk reproducing apparatus according to one embodiment of the present invention constructed as described above will be described below.

高密度記録円盤１１に記録されている映像信号をピック
アップ１２が電気的信号に変換する。映像信号再生回路
１４は、その電気的信号を映像信号に変換する働きをす
る。再生された映像信号はメモリ１ｅとスイッチ１９に
送られる。スイッチ１９は通常、映像信号再生回路側に
設定されていて、端子２ｏよシ映像信号が出力される。A pickup 12 converts a video signal recorded on a high-density recording disk 11 into an electrical signal. The video signal reproducing circuit 14 functions to convert the electrical signal into a video signal. The reproduced video signal is sent to the memory 1e and the switch 19. The switch 19 is normally set on the video signal reproduction circuit side, and the video signal is output from the terminal 2o.

メモリ１６には再生された映像信号が格納されるがこれ
は１フレームごとに書き換えられ、ここには常に再生さ
れた最後のフレームの映像信号が械納されている。サー
ボ回路１６はピックアップ１２の光学ビームを正確に高
密度記録円盤１１に設けられた信号トラックに照射させ
る働きをし、スピンドルモータ１３は正確な再生速度に
なるように高密度記録円盤１１を回転させる。外来ショ
ックによりフォーカスサーボがはずれた時、フォーカス
はツブ位置制御回Ｎｒ１８はピックアップ１２の光学ビ
ームをフォーカスサーボのはずれた位置まで送りその位
置から再生を再開する。また、ピンクアップ１２の光学
ビームをフォーカスサーボのはずれた位置まで送ってい
る間、スイッチ１９をメモリ側に設定し、その間メモリ
１６に格納されているフォーカスサーボがはずれた直前
の位置の映像情報を端子２０に出力する。The reproduced video signal is stored in the memory 16, which is rewritten frame by frame, and the video signal of the last reproduced frame is always stored here. The servo circuit 16 functions to accurately irradiate the optical beam of the pickup 12 onto the signal track provided on the high-density recording disk 11, and the spindle motor 13 rotates the high-density recording disk 11 to achieve an accurate reproduction speed. . When the focus servo is deviated due to an external shock, the focus knob position control circuit Nr18 sends the optical beam of the pickup 12 to the position deviated from the focus servo and resumes reproduction from that position. Also, while the optical beam of the pink-up 12 is being sent to the position where the focus servo is off, the switch 19 is set to the memory side, and during this time the image information of the position immediately before the focus servo is off, which is stored in the memory 16, is Output to terminal 20.

以上のように、本発明の一実施例では、ピックアップと
、スピンドルモータと、映像信号再生回路と、サーボ回
路と、メモリと、フォーカスはずれ検出回路と、ピンク
アップ位置制御回路と、スイッチと、端子を備えること
により、外来シラツク等によりサーボが乱されてピック
アップの光学ビームをサーボが乱される直前の位置へ移
動している期間にもその位置における再生画像を出力端
子に出力し、再生画面の乱れを少なくする事が可能にな
る。As described above, one embodiment of the present invention includes a pickup, a spindle motor, a video signal reproducing circuit, a servo circuit, a memory, an out-of-focus detection circuit, a pink-up position control circuit, a switch, and a terminal. By providing this, even during the period when the servo is disturbed by external noise, etc. and the optical beam of the pickup is moved to the position immediately before the servo is disturbed, the reproduced image at that position is output to the output terminal, and the reproduced image is displayed on the reproduction screen. It becomes possible to reduce disturbance.

発明の効果 以上のように、本発明の光学式記録円盤再生装置によれ
ば、映像情報を記録した光学式記録円盤に光学ビームを
照射して記録情報を電気信号に変換するピックアップと
、ピックアップの対物レンズをフォーカス方向とトラッ
ク方向に動かして光学式記録円盤に正確に光学ビームを
照射するサーボ装置と、ピックアップによシ得られた電
気信号を映像信号に再生する再生装置と、再生された映
像情報を格納する記憶手段と、再生された映像情報を出
力する出力端子と、ピックアップが光学式記録円盤を再
生中にサーボが乱されたことを検出する検出手段と、検
出手段がサーボの乱された事を検出した後にサーボの乱
された位置へピックアップを戻す制御手段と、検出手段
がサーボが乱されたことを検出しない時には映像情報を
記憶手段に格納し、制御手段がサーボの乱された位置へ
ピックアップを戻している間、再生信号の代わりに記憶
手段に格納された映像情報を出力端子に出力することに
より、外来ショック等によりサーボが乱されてピックア
ンプの光学ビームをサーボが乱されてもサーボが乱され
る直前の位置へビックアンプの光学ビームを移動させ、
かつその期間にもその位置における再生画像を出力端子
に出力し、再生画面の乱れを少なくする事が可能となる
。Effects of the Invention As described above, the optical recording disk reproducing apparatus of the present invention includes a pickup that irradiates an optical recording disk on which video information is recorded with an optical beam to convert the recorded information into an electrical signal, and a pickup that converts the recorded information into an electrical signal. A servo device that moves the objective lens in the focus direction and track direction to accurately irradiate an optical beam onto the optical recording disk, a playback device that plays back the electric signal obtained by the pickup into a video signal, and a playback device that plays back the video signal. a storage means for storing information; an output terminal for outputting reproduced video information; a detection means for detecting that the servo has been disturbed while the pickup is reproducing the optical recording disk; control means for returning the pickup to the position where the servo has been disturbed after detecting that the servo has been disturbed; While returning the pickup to the position, by outputting the video information stored in the storage means to the output terminal instead of the playback signal, the servo is disturbed by an external shock etc. and the optical beam of the pick amplifier is disturbed. The optical beam of the big amplifier is moved to the position just before the servo is disturbed,
Also, during that period, the reproduced image at that position is output to the output terminal, making it possible to reduce disturbances in the reproduced screen.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の光学式記録円盤再生装置の
構成を示すブロック図である。第２図は従来の光学式記
録円盤再生装置の構成を示すブロック図である。 １１・・・・・・高密度記録円盤、１２・・・・・・ピ
ックアップ、１３・・・・・・スピンドルモータ、１４
・・・・・・映像信号再生回路、１６・・・・・・サー
ボ回路、１６・・・・・・メモリ、１７・・・・・・フ
ォーカスはずれ検出回路、１日・・・・・・ピックアッ
プ位置制御回路、１９・・・・・・スイッチ、２ｏ・・
・・・端子。FIG. 1 is a block diagram showing the configuration of an optical recording disk reproducing apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a conventional optical recording disk reproducing apparatus. 11...High-density recording disk, 12...Pickup, 13...Spindle motor, 14
...Video signal reproduction circuit, 16...Servo circuit, 16...Memory, 17...Out-of-focus detection circuit, 1st... Pickup position control circuit, 19... switch, 2o...
...Terminal.

Claims (3)

【特許請求の範囲】[Claims] （１）映像情報を記録した光学式記録円盤に光学ビーム
を照射して記録情報を電気信号に変換するピックアップ
と、ピックアップの対物レンズをフォーカス方向とトラ
ック方向に動かして光学式記録円盤に正確に光学ビーム
を照射するサーボ装置と、ピックアップにより得られた
電気信号を映像信号に再生する再生装置と、再生された
映像情報を格納する記憶手段と、再生された映像情報を
出力する出力端子と、前記ピックアップが前記光学式記
録円盤を再生中にサーボが乱されたことを検出する検出
手段と、該検出手段がサーボの乱された事を検出した後
にサーボの乱された位置へピックアップを戻す制御手段
と、前記検出手段がサーボが乱されたことを検出しない
時には映像情報を前記記憶手段に格納し、前記制御手段
がサーボの乱された位置へピックアップを戻している間
、前記再生信号の代わりに前記記憶手段に格納された映
像情報を出力端子に出力する事を特徴とする光学式記録
円盤再生装置。(1) A pickup that converts the recorded information into electrical signals by irradiating an optical beam onto the optical recording disk on which video information is recorded, and a pickup that moves the objective lens of the pickup in the focus direction and track direction to accurately record the information on the optical recording disk. a servo device that irradiates an optical beam, a playback device that plays back the electrical signal obtained by the pickup into a video signal, a storage unit that stores the played video information, and an output terminal that outputs the played video information; a detection means for detecting that the servo has been disturbed while the pickup is reproducing the optical recording disk; and a control for returning the pickup to the position where the servo was disturbed after the detection means detects that the servo has been disturbed. means for storing video information in the storage means when the detecting means does not detect that the servo is disturbed, and replacing the reproduction signal while the control means returns the pickup to the disturbed position of the servo. An optical recording disk reproducing apparatus characterized in that the video information stored in the storage means is outputted to an output terminal. （２）フォーカスサーボが外れたことを検出する検出手
段を備えた事を特徴とする特許請求の範囲第１項記載の
光学式記録円盤再生装置。(2) The optical recording disk reproducing apparatus according to claim 1, further comprising a detection means for detecting that the focus servo is off. （３）予め定められた数以上のトラックを光学ビームを
横切った事を検出する検出手段を備えた事を特徴とする
特許請求の範囲第１項記載の光学式記録円盤再生装置。(3) The optical recording disk reproducing apparatus according to claim 1, further comprising a detection means for detecting that the optical beam crosses a predetermined number of tracks or more.
JP29695486A 1986-12-12 1986-12-12 Optical recording disk reproducing device Pending JPS63149836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29695486A JPS63149836A (en) 1986-12-12 1986-12-12 Optical recording disk reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29695486A JPS63149836A (en) 1986-12-12 1986-12-12 Optical recording disk reproducing device

Publications (1)

Publication Number Publication Date
JPS63149836A true JPS63149836A (en) 1988-06-22

Family

ID=17840332

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29695486A Pending JPS63149836A (en) 1986-12-12 1986-12-12 Optical recording disk reproducing device

Country Status (1)

Country Link
JP (1) JPS63149836A (en)

Similar Documents

Publication Publication Date Title
EP0064395B1 (en) Apparatus for reproducing an audio disc
EP0491563A2 (en) Information recording/reproducing apparatus
JPS63149836A (en) Optical recording disk reproducing device
JP2615602B2 (en) Optical recording disk playback device
JPS61284870A (en) Reproducing/recording device
JP2705479B2 (en) Information playback device
KR960002040B1 (en) Optical disk reproducing device
JPS6252767A (en) Disc reproducing device
JPS59148182A (en) Track access system
JP2860093B2 (en) Information storage medium playback device
JPH0127184Y2 (en)
JPS5954084A (en) Special reproducer
JPS60201782A (en) Video disk player
JPS6354082A (en) System for reroducing still picture with sound
JPH0373067B2 (en)
JPS647428B2 (en)
KR20000041476A (en) Method for controlling track jump of optical disk system
KR19990041946A (en) How to Navigate a Track in an Optical Disc Player
JPH0366748B2 (en)
KR19990041948A (en) How to Navigate a Track in an Optical Disc Player
KR19980030544A (en) Tracking stabilization device and method for optical disc player
KR19990035345A (en) Repeat play method of optical disc player
KR19980058847A (en) Improved playback of video compact disc players
JPS61144780A (en) Compact disk player
KR19990026856A (en) Spindle Motor Control Method in Optical Disc Player