TH15948B - Waveform shaping methods and equipment for optical recording. - Google Patents

Abstract

Methods and equipment for improving the characteristics of skin effects recorded on optical recording discs, for use with optical recording equipment. This includes a written beam source and an optical modulator. For modulating the intensity of the written beam Of the light above And under the threshold level of the moving recording medium In response to the signal Driving a modulator for recording information on that medium, the beam can have an impact. Cause recording slit or mark in moving recording medium. When the beam is written Above that starting limit And cannot cause skin effects in the recording medium moving when the beam written below the threshold level, that method includes Receiving waveforms that are Enough rectangle With leading edges and along, that provides a modulator drive signal to modulate the beam that is written to provide great power above the starting limit. And to keep the lowest power level below the respective threshold, and to produce a shaped modulator drive signal By adding strength at the top of Burned beam Response to the occurrence of leading edges, by reducing the time the modulator drive signal at Give shape and then Above the starting limit To maintain the specified workload cycle In that record of Skin effect in a moving recording medium, and by producing a leading edge and by its symmetrical Effect that skin

Claims (4)

1.A waveform shaping circuit for use in optical recording equipment. Including the source Burned beam And optical modulator for modulating the written beam intensity of light contained. Above or below the threshold level of the moving recording medium In response to the driver signal Modulator for recording information on that medium, the beam can have an effect Skin log groove in the moving recording medium When the beam that is written above the threshold begins to change and is unable to influence the recording slit of the surface in the recording medium to move when the beam written under the threshold begins to shift, the waveform cycle. Contains: A slow path for receiving a sufficiently rectangular waveform with leading edges and along, that provides a driving signal for such modulators. To modulate the written beam, and to delay the leading edge As it passes through the edge, as it does not slow down thereof; And the trajectory to shape the waveforms coupled with the deceleration path For production Modulator drive signal that has been shaped Precipitous Which has reached the first level enough to cause the beam to be written so that there is an intensity above the threshold of the moving medium, and with a continuously moving edge that changes the amplitude at the predetermined speed. In order to reach the second level enough to lighten the beam That wrote With intensity below the threshold of the moving medium At the time before the birth of each next leading edge of the receiving rectangle waveform 2. The circuit shapes the waveform as requested in claim 1, where the said edge of Modulator drive signal that has been shaped It is a linear type 3. Waveforming circuit as requested in claim 1, where waveform path Such includes The path for modifying the amplitude of the signal drives the shaped modulator 4. The waveform circuit as requested in claim 1, where the path is shaped wave It consists of a path for converting the average D.C. level of the shaped modulator drive signal. 5. The circuit shapes the waveforms as requested in the Clause. 1, where the waveform trajectory consists of a path for varying the slope of the continuously moving edge of the shaped modulator drive signal. Who requested the right to claim Article 5, where the path for converting The slope of the moving edge of the driven signal, the shaped modulator, consists of an adjustable radius source. 7. The waveform circuit as requested, holds the right to claim. Right clause 1, where the aforementioned deferred path includes a method for adjusting the delay of the said leading edge, approximately 1 1/2 when T is a period of constant time defined in the rules for the EFM standard code in Recording and repeating dishes Record information, commonly known as compact disk, 8. The waveform circuit as requested in Clause 1, where: Such surface effect is pit on the recording surface of the recording medium. That moves therein; And select the delay trajectory and amplitude And the shape of the driving signal Modulator that gives such shape Produced by the waveform method Just to make a pit in Such moving recording medium, which is relative to the land between such pits According to the record tracks of The switch of pit and land, has a defined workload cycle. With such land When a rectangular waveform 9. The waveformed circuit as requested in claim 1, where, under the influence of Such a shaped modulator drive signal, the written beam affects the surface in the form of In such a moving recording medium, the pit has a leading edge formed by the steep leading edge of the The signal drives such a shaped modulator, and whose edges are formed by the edge as it moves continuously. Of the aforementioned modulator drive signal, in that way the pit is formed with leading edges and according to symmetry 1 0. The circuit shapes the waveforms as requested in Clause 9, Where the waveform trajectory consists of a path for modulation of amplitude, average DC level and the slope of The edge of the signal to drive the modulator that has been shaped as such Pit produced that way in the medium Recording that moves Waveformed And which has a defined workload cycle with land between pits when the aforementioned rectangular waveform received by the slow delay path is a square wave 1 1. Waveforming circuit for use in optical recording devices. Including the source Burned beam And optical modulator for modulating the written beam intensity of light contained. Above or below the threshold level of the moving recording medium In response to the driver signal Modulator for recording information on that medium, the beam can Continuity of the skin in the moving recording medium. When the beam that is written above the line begins to change and does not Able to cause surface discontinuities in the moving recording medium. When the beam is written Under the threshold, the waveform arrangement circuit consists of: waveform processing path for obtaining sufficient rectangular waveforms. With a leading edge and along, that gives a signal to drive the said modulator To modulate the written beam, and for the production of a shaped modulator drive signal. With a steep leading edge At the first level enough to do Let the beam written therein Has an intensity above the threshold of the moving medium, and has an edge as Continuously scrolling at changing amplitude at a predetermined speed. In order to reach the second level, enough to make The written beam has an intensity below the threshold of the moving medium. In time before the birth of Each leading edge continues Of the receiving rectangle waveform 1 2. The circuit shapes the waveform as requested in Clause 11, where the said edge of The aforementioned modulator drive signal is linear. 1 3. The circuit shapes the waveform as requested in Clause 11, where the pathway is processed. The waveform contains a path for modulating the amplitude of a shaped modulator drive signal. Then it was mentioned. 1 4. The circuit shapes the waveforms as requested in Clause 11, where the method of processing The waveform consists of The path for converting the average D.C. level of the modulator driving signal provided 1. 5. The circuit shapes the waveform as requested in Clause 11, where the method of processing. The waveform consists of a path for varying the slope of the continuously displaced edge of the shaped modulator drive signal 1 6. The circuit shapes the waveform as requested in the claim. Rights Article 15, where the means for converting The steepness of the edge along that continuation of the shaped modulator drive signal. Consists of a variable constant current source 7. Waveforming circuit as requested in Clause 11, also includes: Delay paths coupled with loud waveform processing paths. Say for receiving A sufficiently rectangular waveform With a leading edge and accordingly, which gives a driving signal Such modulators To modulate the written beam, and to slow down such leading edges while passing through such non-slowed edges; And where such delays Including a method for adjusting the slowdown of the leading edge It is also said that about 1 1/2 when T is a period of constant time specified in the EFM standard code rules for recording and reproducing the disc. Commonly known as Compact Disc 1 8. The circuit shapes the waveforms as requested in Clause 11, it also consists of additional. The delay paths that follow the waveform processing path. For retarding such leading edge as it passes through an edge without such delay; And where the delays of the slow trajectory and the amplitude and shape of the modulator drive signal give it such shape. Produced by the aforementioned waveform processing paths only produces a pit in the moving recording medium, which is relative to the land between those pits according to the log groove of the pit and land switching, with load cycles. Scheduled task With such land when the aforementioned rectangular wave form Received by the said waveform processing method A square wave 1. 9. The circuit shapes the wave form as requested in Clause 11, where under the influence of The modulator drive signal that has been shaped as such The written beam produces a pit in the recording medium where In such a movement, the pitch has a leading edge formed by the steep leading edge of the aforementioned modulator drive signal, and has the edge as it is formed by the continuously moving edge of the signal. Drive the modulator at Thus, in that way, the pit is formed with leading edges and according to symmetry 2 0. The circuit shapes the waveform as requested in claim 19, where the path is processed. The waveform consists of a path for modulation of the amplitude, average D.C. level, and the slope of the along edge of the shaped modulator drive signal. Pit produced that way in a medium Recording that moves Shaped And which has a defined workload cycle With land between pits, when such a rectangular waveform received by the said waveform processing path It's a square wave 2. 1.A waveform shaping circuit for use in optical recording equipment. Including the source Burned beam And optical modulator for modulating the written beam intensity of light contained. Above or below the threshold level of the moving recording medium In response to the driver signal Modulator for recording information on that medium, the beam can have an effect Skin log groove in the moving recording medium When the beam that is written above the threshold begins to change and is unable to influence the recording slit of the surface in the recording medium to move when the beam written under the threshold begins to shift, the waveform cycle. Consists of: Pathways for receiving a sufficiently rectangular waveform. With a leading edge and along, that gives a signal to drive the said modulator To modulate the beam to power the peak power above the threshold, and to bring the lowest power level below the starting threshold respectively; And the way to shape the waveforms that align with the receiving path For producing driver signals Modulator that has been shaped Which increases the power at the tops of the burnt beam Responding to the emergence of Such a leading edge, reducing the time the signal drives the shaped modulator. Above the starting limit To maintain the workload cycle that is already set In the log groove of the surface effect in a moving recording medium, and produce a symmetrical geometric shape. At the leading edge and along Of the said record rut. Such skin effects 2 2. Methods for improving the characteristics of the mark. Recorded on an optical recording plate, for use with optical recording devices. Which includes written light sources And optical modulator for modulating the intensity of the written beam of light above and below the stroke level. Start the replacement of the moving recording medium. In response to the driver signal, the modulator for To record information on that medium, the beam can have an effect on the surface of the log groove. Moving recording medium When the beam that was written above the limit began to change And unable to have The effect produces the skin log groove in the moving recording medium. When the beam that is written under the threshold changes, the method consists of a procedure of: obtaining a sufficiently rectangular waveform. With leading edges and along, that gives a signal Drive such modulator To modulate the beam that is written; And production of a shaped modulator drive signal Precipitous At the first level to Make the beam written thereon It has an intensity above the threshold of the moving medium, and has a continuous scrolling edge. To change the amplitude at a set speed In order to reach the second level enough to do Let the beam written therein With intensity below the threshold of the moving medium In time before birth Of each edge leading to the next Of the receiving rectangle waveform 2 3. Method for which the claim is made in Clause 22, which includes the adjustment of the width of the equity The signal to drive the modulator that has been shaped as such Which is above the starting limit, adjusting the slope of The following continuous scrolling edges, and the amplitude and offset D.C. of the shaped modulator drive signal. To produce a surface effect in the recording medium that has a predetermined load cycle and the area between the surface effects. Along the furrows and symmetrical geometry In the leading edge and by Of the aforementioned log groove of the aforementioned skin effects 2 4. Methods for improving the characteristics in the mark. Optical recorder, for use with optical recording equipment This includes a written beam source and an optical modulator for modulating the intensity of the written beam of light. Above or below the threshold level Of the moving recording medium In response to the signal driving the modulator for recording. With information on that medium, the beam can have an effect on the surface log groove in the medium. Moving recording When the beam that was written above the limit began to change And unable to have an effect Cause such recording grooves of the skin in the moving recording medium. When the beam that is written under the threshold changes, the method consists of a procedure of: obtaining a sufficiently rectangular waveform. With a leading edge and along, that gives a signal to drive the said modulator To modulate the beam that is written to power the peak above the threshold and to bring the lowest power level below the starting threshold respectively; And production of a shaped modulator drive signal By increasing the power at the top of the beam It is written in response to the occurrence of such leading edges, reducing the time taken for the signal to drive the modulator that provides Then the shape Above the starting limit To maintain the workload cycle that is already set In the record groove of A surface effect in a moving recording medium, and producing a symmetrical geometric shape at the leading edge and along of the said slit of the surface effect.