TWI423253B - Recording apparatus and associated recording method - Google Patents
Recording apparatus and associated recording method Download PDFInfo
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本發明有關於用於光碟機之燒錄方法及裝置,且更特別地,有關於能夠降低光碟機之旋轉速率之燒錄方法及裝置。The present invention relates to a burning method and apparatus for an optical disk drive, and more particularly to a burning method and apparatus capable of reducing the rotational speed of the optical disk drive.
光碟機之燒錄速率(例如,4X或8X)主要取決於光碟之類型,而不同類型之光碟具有不同時間碼(time code)。若光碟或光碟機自身之品質惡化,燒錄效率及品質將會受到影響,特別是對於大量燒錄而言,較差的燒錄品質將更加明顯。The burning rate of a disc player (for example, 4X or 8X) depends mainly on the type of disc, and different types of discs have different time codes. If the quality of the optical disc or the optical disc itself deteriorates, the burning efficiency and quality will be affected, especially for a large number of burning, the poor burning quality will be more obvious.
差的光碟機伺服信號,例如散焦(defocus)或由於來自於主機之資料傳輸速率較燒錄速率慢而造成之緩衝資料不足(buffer under-run),可導致燒錄之中斷。於再聚焦或將資料補充至緩衝器之後,燒錄被重連並重新開始。因為中斷前後之燒錄速率並未改變,中斷和重連可反覆發生。如此不斷之燒錄中斷與重連嚴重影響燒錄速率,甚至會導致燒錄品質退化,以致光碟之可讀性惡化。Poor disc drive servo signals, such as defocus or buffer under-run due to slower data transfer rates from the host, can cause burn-in interruptions. After refocusing or replenishing the data to the buffer, the programming is reconnected and restarted. Since the burn rate does not change before and after the interrupt, interrupts and reconnections can occur repeatedly. Such continuous interruptions and reconnections seriously affect the burning rate, and may even lead to degradation of the burning quality, so that the readability of the optical disk deteriorates.
申請號為No. 2002/0172106 A1的US專利,“當光學驅動中發生錯誤時用於控制資料寫入之裝置及方法”,揭示了一種當燒錄被中斷時用來處理燒錄中斷的方法。然而,該方法不能阻止中斷之發生。此外,若光碟之品質較差,光碟之燒錄品質亦不能得到改進。US Patent No. 2002/0172106 A1, "A device and method for controlling data writing when an error occurs in an optical drive", discloses a method for processing a burn interrupt when the burn is interrupted . However, this method does not prevent the occurrence of an interruption. In addition, if the quality of the optical disc is poor, the burning quality of the optical disc cannot be improved.
有鑑於此,特提供以下技術方案:In view of this, the following technical solutions are provided:
本發明實施例提供一種燒錄裝置,用於光碟機,燒錄裝置包含驅動器、伺服信號產生器、濾波器及計數器。驅動器控制光碟機之燒錄速率;伺服信號產生器產生至少一伺服信號;濾波器具有特定頻寬,用以產生濾波伺服信號;計數器依據濾波伺服信號產生計數值,以及當計數值超出觸發值時,指示驅動器降低光碟機之燒錄速率,以利用降低之燒錄速率燒錄。Embodiments of the present invention provide a burning device for an optical disk drive, and the burning device includes a driver, a servo signal generator, a filter, and a counter. The driver controls the burning rate of the optical disc drive; the servo signal generator generates at least one servo signal; the filter has a specific bandwidth for generating the filtered servo signal; the counter generates the count value according to the filtered servo signal, and when the count value exceeds the trigger value Instructs the drive to reduce the burn rate of the optical drive to burn with a reduced burn rate.
本發明實施例另提供一種燒錄方法,用於光碟機,燒錄方法包含:以一燒錄速率執行燒錄操作,其中光碟機之燒錄速率藉由光碟機之驅動器控制;接收至少一伺服信號;濾波接收之伺服信號;依據濾波伺服信號產生計數值;當計數值超出觸發值時,中斷燒錄並降低光碟機之燒錄速率;以及以降低之燒錄速率重新開始燒錄。The embodiment of the present invention further provides a burning method for a CD player. The burning method includes: performing a burning operation at a burning rate, wherein a burning rate of the optical disk drive is controlled by a driver of the optical disk drive; and receiving at least one servo Signal; filter the received servo signal; generate a count value according to the filter servo signal; when the count value exceeds the trigger value, interrupt the burn and reduce the burn rate of the CD player; and resume the burn at the reduced burn rate.
利用本發明之燒錄裝置及燒錄方法,可使判斷降速的時機更為精準,從而改進燒錄品質。By using the burning device and the burning method of the invention, the timing of determining the speed reduction can be more precise, thereby improving the burning quality.
在說明書及後續的申請專利範圍當中使用了某些詞彙來指稱特定的元件。所屬領域中具有通常知識者應可理解,製造商可能會用不同的名詞來稱呼同樣的元件。本說明書及後續的申請專利範圍並不以名稱的差異來作為區分元件的方式,而是以元件在功能上的差異來作為區分的基準。在通篇說明書及後續的請求項當中所提及的「包含」係為一開放式的用語,故應解釋成「包含但不限定於」。另外,「耦接」一詞在此係包含任何直接及間接的電氣連接手段。因此,若文中描述一第一裝置耦接於一第二裝置,則代表第一裝置可直接電氣連接於第二裝置,或透過其他裝置或連接手段間接地電氣連接至第二裝置。Certain terms are used throughout the description and following claims to refer to particular elements. It should be understood by those of ordinary skill in the art that manufacturers may refer to the same elements by different nouns. The scope of this specification and the subsequent patent application do not use the difference of the names as the means for distinguishing the elements, but the difference in function of the elements as the basis for the distinction. The term "including" as used throughout the specification and subsequent claims is an open term and should be interpreted as "including but not limited to". In addition, the term "coupled" is used herein to include any direct and indirect electrical connection. Therefore, if a first device is coupled to a second device, the first device can be directly electrically connected to the second device or indirectly electrically connected to the second device through other devices or connection means.
第1圖係依據本發明之光碟機燒錄裝置之實施例之示意圖。用於光碟機之燒錄裝置10包含信號產生器11、解調變單元12、位準偵測器13、微處理器14、編碼器15、緩衝器16、主機17、DSP 18及驅動器19,其中信號產生器11、解調變單元12及位準偵測器13組成伺服信號產生單元23。耦接至光學讀寫頭21之信號產生器11用於合成藉由光學讀寫頭21自光碟22讀取之光學信號,以產生用於軌道鎖定(track lock)之尋軌誤差(tracking error,簡稱為TE)信號,用於聚焦之聚焦誤差(focus error,FE)信號以及用於定位或控制旋轉速率之wobble信號。所有上述伺服信號隨後被送至DSP 18進行處理以便產生驅動信號TRO、FOO、FMO及DMO。驅動器19能夠藉由驅動信號TRO、FOO及FMO驅動光學讀寫頭21,並藉由驅動信號DMO驅動馬達20旋轉光碟22。除了自信號產生器11被傳送至DSP 18之外,TE、FE及wobble信號亦被分別送至解調變單元12及位準偵測器13。解調變單元12用於解調變wobble信號,若錯誤率(error rate)過高或搖擺同步模式損失(wobble synchronization pattern loss)超出預設門檻值,燒錄中止控制機構141及燒錄速率調整機構142將被啟動以中斷燒錄並降低馬達20之旋轉速率,亦即,燒錄速率將會降低。若位準偵測器13發現TE及FE信號之位準超出預設門檻值,燒錄中止控制機構141及燒錄速率調整機構142亦將被啟動。微處理器14用於控制以及執行燒錄中止控制機構141及燒錄速率調整機構142。首先,燒錄中止控制機構141發送燒錄暫停指令至編碼器15並通知主機17停止將資料傳送至緩衝器16。當燒錄中止被確認之後,微處理器14將設置相關參數用於降低光碟機之旋轉速率,並將該些參數傳送至DSP 18用於產生驅動信號DMO,以降低馬達20之旋轉速率。隨後,燒錄中止控制機構141發送燒錄連接指令至編碼器15,以實施連續的燒錄工作並持續地監視伺服信號是否符合燒錄中止條件。更進一步,微處理器14亦可實施偵測機構143以偵測解調變wobble信號之錯誤率及緩衝資料不足發生之頻率。若解調變wobble信號之錯誤率或緩衝資料不足發生之頻率超出預設門檻值,燒錄中止控制機構141和燒錄速率調整機構142亦將被啟動以中斷燒錄並降低燒錄速率。BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of an embodiment of an optical disk drive burning apparatus in accordance with the present invention. The burning device 10 for the optical disc drive comprises a signal generator 11, a demodulation unit 12, a level detector 13, a microprocessor 14, an encoder 15, a buffer 16, a host 17, a DSP 18 and a driver 19. The signal generator 11, the demodulation unit 12 and the level detector 13 constitute a servo signal generating unit 23. A signal generator 11 coupled to the optical pickup 21 is configured to synthesize an optical signal read from the optical disc 22 by the optical pickup 21 to generate a tracking error for track lock. Referred to as TE) signal, focus error (FE) signal for focusing and wobble signal for positioning or controlling the rotation rate. All of the above servo signals are then sent to the DSP 18 for processing to generate the drive signals TRO, FOO, FMO and DMO. The driver 19 can drive the optical pickup 21 by the drive signals TRO, FOO and FMO, and drive the motor 20 to rotate the optical disk 22 by the drive signal DMO. In addition to being transmitted from the signal generator 11 to the DSP 18, the TE, FE, and wobble signals are also sent to the demodulation unit 12 and the level detector 13, respectively. The demodulation unit 12 is configured to demodulate the wobble signal, and if the error rate is too high or the wobble synchronization pattern loss exceeds a preset threshold, the burn stop control unit 141 and the burn rate adjustment Mechanism 142 will be activated to interrupt programming and reduce the rate of rotation of motor 20, i.e., the burn rate will be reduced. If the level detector 13 finds that the level of the TE and FE signals exceeds the preset threshold, the burn stop control mechanism 141 and the burn rate adjustment mechanism 142 will also be activated. The microprocessor 14 is used to control and execute the burn stop control mechanism 141 and the burn rate adjustment mechanism 142. First, the programming suspension control unit 141 transmits a programming pause command to the encoder 15 and notifies the host 17 to stop transferring the data to the buffer 16. After the burnout is confirmed, the microprocessor 14 will set the relevant parameters for reducing the rotational speed of the optical disk drive and transfer the parameters to the DSP 18 for generating the drive signal DMO to reduce the rotational rate of the motor 20. Subsequently, the burn-in suspension control unit 141 transmits a burn-in connection command to the encoder 15 to perform continuous burn-in work and continuously monitor whether the servo signal conforms to the burn-off condition. Further, the microprocessor 14 can also implement the detecting mechanism 143 to detect the error rate of the demodulated wobble signal and the frequency at which the buffer data is insufficient. If the error rate of the demodulated wobble signal or the frequency of occurrence of insufficient buffer data exceeds the preset threshold, the burn stop control mechanism 141 and the burn rate adjustment mechanism 142 will also be activated to interrupt the burn and reduce the burn rate.
上述燒錄程序可被總結為如第2圖所示之流程圖。第2圖係依據本發明第一實施例之光碟驅動器燒錄流程圖。首先,偵測燒錄狀態(步驟S202),確認燒錄是否已於光碟機中進行(步驟S204),若是,則開始對伺服信號(例如FE或TE信號之位準或搖擺同步模式損失)之偵測(步驟S206);否則,轉至步驟S202。確認上述伺服信號之偵測值是否超出預設門檻值(步驟S208),若是,燒錄將被中斷(步驟S210);否則,轉至步驟S206。隨後,確認燒錄是否停止(步驟S212),若是,降低光碟機之旋轉速率(步驟S214),並且重新開始燒錄工作(步驟S216);否則,轉至步驟S210。上述燒錄程序中可補充偵測燒錄狀態之步驟,用於確定光碟機係處於燒錄狀態亦或停止狀態,從而避免實施偵測伺服信號或降低燒錄速率期間由於錯誤而對燒錄品質及燒錄速率造成影響。The above burning program can be summarized as a flowchart as shown in FIG. Fig. 2 is a flow chart showing the burning of the optical disc drive according to the first embodiment of the present invention. First, the burning status is detected (step S202), it is confirmed whether the programming has been performed in the optical disk drive (step S204), and if so, the servo signal (for example, the level of the FE or TE signal or the rocking synchronous mode loss) is started. Detection (step S206); otherwise, go to step S202. It is confirmed whether the detected value of the servo signal exceeds the preset threshold (step S208), and if so, the programming is interrupted (step S210); otherwise, the process goes to step S206. Subsequently, it is confirmed whether or not the burning is stopped (step S212), and if so, the rotation rate of the optical disk drive is lowered (step S214), and the burning operation is restarted (step S216); otherwise, the process proceeds to step S210. The above-mentioned burning program can supplement the step of detecting the burning state, and is used for determining whether the optical disk system is in a burning state or a stop state, thereby avoiding the quality of burning due to errors during detecting the servo signal or reducing the burning rate. And the burning rate has an impact.
圖3係依據本發明第二實施例的光碟機燒錄流程圖。圖3中的步驟S300~S304類似於圖2中的步驟S200~S204,步驟S308~S318類似於圖2中的步驟S200~S218,為簡潔起見,此處不再詳述。不同於圖2的是,除將上述伺服信號作為降低光碟機旋轉速率之基準之外,偵測解調變wobble信號之錯誤率或一段時間週期內由於緩衝資料不足所造成之燒錄中斷之次數(亦即,緩衝資料不足發生之頻率)(步驟S306),亦可作為啟動燒錄速率調整機構之基準。若解調變wobble信號之錯誤率或緩衝資料不足發生之頻率超出預設門檻值,燒錄不會重新開始,直至光碟機之旋轉速率降低。Fig. 3 is a flow chart showing the burning of the optical disk drive according to the second embodiment of the present invention. Steps S300-S304 in FIG. 3 are similar to steps S200-S204 in FIG. 2, and steps S308-S318 are similar to steps S200-S218 in FIG. 2, which will not be described in detail herein for the sake of brevity. Different from FIG. 2, in addition to using the servo signal as a reference for reducing the rotation rate of the optical disc drive, detecting the error rate of the demodulated wobble signal or the number of burn interrupts caused by insufficient buffer data during a period of time (that is, the frequency at which the buffer data is insufficient to occur) (step S306) can also serve as a reference for starting the burn rate adjustment mechanism. If the error rate of the demodulation wobble signal or the frequency of insufficient buffer data exceeds the preset threshold, the programming will not restart until the rotation speed of the optical disk drive decreases.
此外,其他信號,例如驅動器之溫度、wobble信號之搖擺抖動(wobble jitter)或寫功率亦可被用作用於降低驅動器旋轉速率之決定指標。上述參數可於燒錄前即被監視及控制,以使燒錄起始之燒錄品質可被進一步提升。In addition, other signals, such as the temperature of the driver, the wobble jitter of the wobble signal, or the write power can also be used as a deciding factor for reducing the spin rate of the driver. The above parameters can be monitored and controlled before burning, so that the burning quality of the burning start can be further improved.
類似於第1圖,第4圖係依據本發明光碟機之燒錄裝置40之另一實施例之示意圖。對比第1圖,搖擺抖動裝置30取代了解調變單元12,用於偵測wobble信號之抖動,而第1圖中之位準偵測器13被省去。藉由溫度傳感器24偵測到之驅動器之溫度與寫功率位準被傳送至微處理器14。因此,驅動器之溫度、搖擺抖動及寫功率被進一步考慮用於決定降低驅動器19之旋轉速率之時機。若微處理器14能夠計算wobble信號之抖動,則搖擺抖動裝置30可被省去。微處理器14進一步包含最大寫功率估計機構(maximal write power estimation mechanism)144用於在燒錄處理期間依據最佳功率校正(optimal power calibration,簡稱為OPC)結果估計寫功率之最大值,最大寫功率估計機構144用於控制DSP 18。Similar to Fig. 1, Fig. 4 is a schematic view showing another embodiment of the burning apparatus 40 of the optical disk drive according to the present invention. In contrast to Fig. 1, the wobble dithering device 30 replaces the demodulation transforming unit 12 for detecting the wobble of the wobble signal, and the level detector 13 in Fig. 1 is omitted. The temperature and write power level of the driver detected by temperature sensor 24 is communicated to microprocessor 14. Therefore, the temperature, wobble jitter, and write power of the driver are further considered for determining the timing of reducing the rate of rotation of the driver 19. If the microprocessor 14 is capable of calculating the jitter of the wobble signal, the wobble jittering device 30 can be omitted. The microprocessor 14 further includes a maximum write power estimation mechanism 144 for estimating the maximum value of the write power according to the optimal power calibration (OPC) result during the burn process, and writing the maximum Power estimation mechanism 144 is used to control DSP 18.
第5圖係燒錄前對於驅動器速率之控制程序。燒錄前驅動器速率及相關設置被設定(步驟S502),隨後搖擺抖動及驅動器之溫度被偵測,寫功率被校準並被估計(步驟S504)。確認搖擺抖動、驅動器之溫度及寫功率之至少一者是否超出其對應之預設值(步驟S506),若是,則驅動器速率減慢,並且相關設置被改變(步驟S508)。否則,認為驅動器之速率及相關設置處於安全狀況,並開始燒錄(步驟S510)。Figure 5 shows the control program for the drive rate before burning. The drive rate and associated settings are set before the burn (step S502), then the wobble jitter and the temperature of the drive are detected, the write power is calibrated and estimated (step S504). It is confirmed whether at least one of the wobble jitter, the temperature of the driver, and the write power exceeds its corresponding preset value (step S506), and if so, the drive rate is slowed down, and the related setting is changed (step S508). Otherwise, the rate of the drive and the associated settings are considered to be in a safe condition and burning begins (step S510).
第6圖係燒錄期間(亦即,燒錄開始後)對於驅動器速率之控制程序。設定驅動器速率及相關設置並開始燒錄(步驟S602),隨後偵測驅動器之溫度、搖擺抖動及寫功率(步驟S604)。確認驅動器之溫度、搖擺抖動或寫功率是否超出預設門檻值(步驟S606),若是,燒錄中斷,否則,轉至步驟S604。確認燒錄停止之後驅動器之旋轉速率降低。燒錄不會重新開始,直至光碟機之旋轉速率降低。步驟S608~S616類似于圖2中的步驟S210~S218,為簡潔起見,此處不再詳述。Figure 6 shows the control procedure for the drive rate during the burn-in (i.e., after the start of programming). The drive rate and related settings are set and the programming is started (step S602), and then the temperature of the driver, the wobble jitter, and the write power are detected (step S604). It is confirmed whether the temperature of the driver, the wobble jitter, or the write power exceeds the preset threshold (step S606), and if so, the programming is interrupted, otherwise, the process goes to step S604. Confirm that the rotation rate of the drive is reduced after the burn stop. The burning will not restart until the rotation speed of the CD player is reduced. Steps S608-S616 are similar to steps S210-S218 in FIG. 2, and are not described in detail herein for the sake of brevity.
燒錄速率已隨著技術之發展而增大。然而,高燒錄速率可將雜訊引入伺服信號中,其中雜訊可由碟片品質特徵(例如,碟片不均勻著色(uneven dye))或光碟機機構特徵(例如,震動)造成。The burn rate has increased with the development of technology. However, the high burn rate can introduce noise into the servo signal, where the noise can be caused by disc quality characteristics (e.g., uneven coloring of the disc) or characteristics of the optical disc mechanism (e.g., vibration).
第7圖係依據本發明一實施例之用於光碟機之燒錄裝置70之示意圖。燒錄裝置70包含信號產生器11、微處理器71、編碼器15、緩衝器16、主機17、DSP 18及驅動器19。耦接至光學讀寫頭21之信號產生器11用於合成藉由光學讀寫頭21自光碟22讀取之光學信號並產生伺服信號,例如用於軌道鎖定之TE信號,用於聚焦之FE信號、用於定位或控制燒錄速率之wobble信號,以及表現反射光總強度之副光束加總(sub-beam add,簡稱為SBAD)信號等等。伺服信號隨後被送至DSP 18以便產生至驅動器19之驅動信號TRO、FOO、FMO及DMO。此外,DSP 18利用濾波器72濾波伺服信號以濾除雜訊。於某些實施例中,濾波器72可藉由硬體,而非DSP 18實施。驅動器19依據驅動信號TRO、FOO及FMO驅動光學讀寫頭21,並依據驅動信號DMO驅動馬達20旋轉光碟22。因此,光碟機之燒錄速率藉由驅動器19控制。微處理器71接收並偵測濾波伺服信號以決定是否降低用於燒錄之燒錄速率。微處理器71可偵測濾波伺服信號之信號位準是否超出特定門檻值。微處理器71可包含計數器,以依據濾波伺服信號產生計數值。計數器可藉由計算濾波伺服信號之信號位準超出特定門檻值之次數而產生計數值。該計數器可實施於微處理器71外部之電路中或係微處理器71之內部操作。此外,微處理器71外部之電路亦可用於偵測濾波伺服信號之信號位準是否超出特定門檻值,以便降低微處理器71之負擔。一旦濾波伺服信號之信號位準較特定門檻值大時,微處理器71更新計數器之計數值。當計數器之計數值超出一觸發值時,微處理器71發送燒錄暫停指令至編碼器15並通知主機17停止將資料傳輸至緩衝器16。當燒錄中止被確認之後,微處理器71設置相關參數用於降低光碟機之燒錄速率,並將已設定之參數傳送至DSP 18用於產生驅動信號DMO,以降低馬達20之旋轉速率。隨後,微處理器71發送燒錄連接指令至編碼器15,以實施連續的燒錄並持續地監視伺服信號是否符合燒錄中止條件。更進一步,微處理器71可重置計數器以重算濾波伺服信號之信號位準超出特定門檻值之次數。於某些實施例中,當光碟機之燒錄速率降低時,微處理器71可重置計數器以重新產生計數值。Fig. 7 is a schematic view of a burning device 70 for an optical disk drive according to an embodiment of the present invention. The programming device 70 includes a signal generator 11, a microprocessor 71, an encoder 15, a buffer 16, a host 17, a DSP 18, and a driver 19. A signal generator 11 coupled to the optical pickup 21 is configured to synthesize an optical signal read from the optical disc 22 by the optical pickup 21 and generate a servo signal, such as a TE signal for track locking, for focusing FE A signal, a wobble signal for locating or controlling the burn rate, and a sub-beam add (SBAD) signal representing the total intensity of the reflected light. The servo signals are then sent to the DSP 18 to generate drive signals TRO, FOO, FMO and DMO to the driver 19. In addition, DSP 18 filters filter signals using filter 72 to filter out noise. In some embodiments, filter 72 can be implemented by hardware rather than by DSP 18. The driver 19 drives the optical pickup 21 in accordance with the drive signals TRO, FOO and FMO, and drives the motor 20 to rotate the optical disk 22 in accordance with the drive signal DMO. Therefore, the burning rate of the optical disk drive is controlled by the drive 19. The microprocessor 71 receives and detects the filtered servo signal to determine whether to reduce the burn rate for programming. The microprocessor 71 can detect whether the signal level of the filtered servo signal exceeds a certain threshold. The microprocessor 71 can include a counter to generate a count value in accordance with the filtered servo signal. The counter can generate a count value by calculating the number of times the signal level of the filtered servo signal exceeds a certain threshold value. The counter can be implemented in circuitry external to microprocessor 71 or internal to microprocessor 71. In addition, the circuit external to the microprocessor 71 can also be used to detect whether the signal level of the filtered servo signal exceeds a certain threshold value, so as to reduce the burden on the microprocessor 71. Once the signal level of the filtered servo signal is greater than a particular threshold value, microprocessor 71 updates the count value of the counter. When the count value of the counter exceeds a trigger value, the microprocessor 71 sends a burn-on pause command to the encoder 15 and notifies the host 17 to stop transferring the data to the buffer 16. After the burn stop is confirmed, the microprocessor 71 sets relevant parameters for reducing the burn rate of the optical disk drive, and transmits the set parameters to the DSP 18 for generating the drive signal DMO to reduce the rotation rate of the motor 20. Subsequently, the microprocessor 71 sends a burn connection command to the encoder 15 to perform continuous programming and continuously monitor whether the servo signal conforms to the burn-off condition. Further, the microprocessor 71 can reset the counter to recalculate the number of times the signal level of the filtered servo signal exceeds a certain threshold. In some embodiments, when the burn rate of the optical disk drive is reduced, the microprocessor 71 can reset the counter to regenerate the count value.
第7圖中,濾波器72藉由DSP 18實施,濾波器72係具有特定頻寬之濾波器,其中該特定頻寬可依據光碟之當前燒錄速率決定。因此,當微處理器71通知DSP 18產生驅動信號DMO以降低馬達20之旋轉速率時,DSP 18可響應馬達20之降低之旋轉速率調整濾波器72之特定頻寬。於本實施例中,濾波器72係頻寬範圍介於4倍(4X)燒錄速率及40倍(40X)燒錄速率之間之帶通濾波器(band pass filter)。舉例而言,當馬達20中之轉軸之旋轉速率係250Hz時,DSP 18可調節濾波器72之係數以使得濾波器72之頻寬範圍介於1KHz至10KHz之間。於本發明中,介於4倍(4X)燒錄速率及40倍(40X)燒錄速率之間之頻寬範圍用於濾除由燒錄速率引起之低頻雜訊,例如諧波(harmonics),以及由碟片品質或光碟機機構特性引起之高頻雜訊。於一實施例中,濾波器72實施於DSP 18外部之電路中。於另一實施例中,濾波器72及計數器可實施於同一電路中,其中計數器用於計算濾波伺服信號之信號位準超出特定門檻值之次數。In Fig. 7, filter 72 is implemented by DSP 18, which is a filter having a particular bandwidth, wherein the particular bandwidth can be determined based on the current programming frequency of the disc. Thus, when the microprocessor 71 notifies the DSP 18 to generate the drive signal DMO to reduce the rate of rotation of the motor 20, the DSP 18 can adjust the particular bandwidth of the filter 72 in response to the reduced rate of rotation of the motor 20. In the present embodiment, the filter 72 is a band pass filter having a bandwidth between a 4x (4X) burn rate and a 40x (40X) burn rate. For example, when the rotational speed of the shaft in the motor 20 is 250 Hz, the DSP 18 can adjust the coefficients of the filter 72 such that the filter 72 has a bandwidth ranging between 1 KHz and 10 KHz. In the present invention, a bandwidth range between a 4x (4X) burn rate and a 40x (40X) burn rate is used to filter low frequency noise caused by the burn rate, such as harmonics. And high frequency noise caused by the quality of the disc or the mechanism characteristics of the disc player. In one embodiment, filter 72 is implemented in circuitry external to DSP 18. In another embodiment, the filter 72 and the counter can be implemented in the same circuit, wherein the counter is used to calculate the number of times the signal level of the filtered servo signal exceeds a certain threshold.
第8圖係依據本發明一實施例之用於光碟機之燒錄方法之示意圖。首先,於光碟機中,以由驅動器控制之燒錄速率燒錄執行燒錄(步驟S802),伺服信號產生器藉由合成讀取自光碟之光學信號來產生伺服信號。接著,濾波器接收至少一伺服信號(步驟S804)並隨後以特定頻寬濾波所接收之伺服信號(步驟S806)。隨後,偵測濾波伺服信號之信號位準是否超出特定門檻值,並且當決定濾波伺服信號之信號位準超出特定門檻值時,更新計數器之計數,亦即計算濾波伺服信號之信號位準超出特定門檻值之次數(步驟S808)。當計數器之計數超出觸發值時,執行燒錄中止程序以中斷燒錄程序,並通知驅動器降低燒錄速率(步驟S810)。隨後,以降低之燒錄速率重新開始燒錄程序(步驟S812)並響應降低之燒錄速率調整濾波器之特定頻寬以便依據降低之燒錄速率濾波所接收之伺服信號。藉由利用具有介於4倍(4X)燒錄速率及40倍(40X)燒錄速率之間之頻寬範圍之濾波器濾除伺服信號之雜訊,從而燒錄品質被提升。Figure 8 is a schematic diagram of a burning method for an optical disk drive according to an embodiment of the present invention. First, in the optical disc drive, burning is performed at a burn rate programmed by the drive (step S802), and the servo signal generator generates a servo signal by synthesizing the optical signal read from the optical disc. Next, the filter receives at least one servo signal (step S804) and then filters the received servo signal with a particular bandwidth (step S806). Then, detecting whether the signal level of the filtered servo signal exceeds a specific threshold value, and when determining that the signal level of the filtered servo signal exceeds a certain threshold value, updating the counter count, that is, calculating the signal level of the filtered servo signal exceeds a specific The number of threshold values (step S808). When the count of the counter exceeds the trigger value, the burn-in suspension program is executed to interrupt the burn-in program, and the drive is notified to lower the burn-in rate (step S810). Subsequently, the programming is resumed at a reduced programming rate (step S812) and the particular bandwidth of the filter is adjusted in response to the reduced programming rate to filter the received servo signal in accordance with the reduced programming rate. The quality of the burn-in is improved by filtering the noise of the servo signal by using a filter having a bandwidth range between 4 times (4X) burn rate and 40 times (40X) burn rate.
以上所述僅為本發明之較佳實施例,舉凡熟悉本案之人士援依本發明之精神所做之等效變化與修飾,皆應涵蓋於後附之申請專利範圍內。The above are only the preferred embodiments of the present invention, and equivalent changes and modifications made by those skilled in the art to the spirit of the present invention are intended to be included in the scope of the appended claims.
10、40、70...燒錄裝置10, 40, 70. . . Burning device
11...信號產生器11. . . Signal generator
12...解調變單元12. . . Demodulation unit
13...位準偵測器13. . . Level detector
14、71...微處理器14, 71. . . microprocessor
15...編碼器15. . . Encoder
16...緩衝器16. . . buffer
17...主機17. . . Host
18...DSP18. . . DSP
19...驅動器19. . . driver
20...馬達20. . . motor
21...光學讀寫頭twenty one. . . Optical head
22...光碟twenty two. . . Disc
23...伺服信號產生單元twenty three. . . Servo signal generating unit
24...溫度傳感器twenty four. . . Temperature Sensor
30...搖擺抖動裝置30. . . Swing shake device
72...濾波器72. . . filter
141...燒錄中止控制機構141. . . Burn stop control mechanism
142...燒錄速率調整機構142. . . Burning rate adjustment mechanism
143...偵測機構143. . . Detection mechanism
144...最大寫功率估計機構144. . . Maximum write power estimation mechanism
S200~S218、S300~S318、S500~S510、S600~S616、S802~S812...步驟S200~S218, S300~S318, S500~S510, S600~S616, S802~S812. . . step
第1圖係依據本發明之光碟機燒錄裝置實施例之示意圖。BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an embodiment of an optical disk drive burning apparatus according to the present invention.
第2圖係依據本發明第一實施例之光碟機燒錄流程圖。Fig. 2 is a flow chart showing the burning of the optical disk drive according to the first embodiment of the present invention.
第3圖係依據本發明第二實施例之光碟機燒錄流程圖。Fig. 3 is a flow chart showing the burning of the optical disk drive according to the second embodiment of the present invention.
第4圖係依據本發明之光碟機燒錄裝置另一實施例之示意圖。Figure 4 is a schematic view showing another embodiment of the optical disk drive burning apparatus according to the present invention.
第5圖係依據本發明第三實施例之燒錄前之光碟機燒錄流程圖。Fig. 5 is a flow chart showing the burning of the optical disk drive before burning according to the third embodiment of the present invention.
第6圖係依據本發明第四實施例之燒錄期間之光碟機燒錄流程圖。Fig. 6 is a flow chart showing the burning of the optical disk drive during the burning according to the fourth embodiment of the present invention.
第7圖係依據本發明實施例之用於光碟機之燒錄裝置之示意圖。Figure 7 is a schematic view of a burning apparatus for an optical disk drive according to an embodiment of the present invention.
第8圖係依據本發明實施例之用於光碟機之燒錄方法之流程圖。Fig. 8 is a flow chart showing a method of burning a disc player according to an embodiment of the present invention.
11...信號產生器11. . . Signal generator
15...編碼器15. . . Encoder
16...緩衝器16. . . buffer
17...主機17. . . Host
18...DSP18. . . DSP
19...驅動器19. . . driver
20...馬達20. . . motor
21...光學讀寫頭twenty one. . . Optical head
22...光碟twenty two. . . Disc
70...燒錄裝置70. . . Burning device
71...微處理器71. . . microprocessor
72...濾波器72. . . filter
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US20020150004A1 (en) * | 2001-01-25 | 2002-10-17 | Kadlec Ron J. | Digital tracking servo system with tracking skate detection |
US20030165097A1 (en) * | 2002-03-04 | 2003-09-04 | Hsien-Yu Tseng | Method for adjusting the write speed of data recording device and apparatus thereof |
US20050041565A1 (en) * | 2003-08-22 | 2005-02-24 | Tse-Hsiang Hsu | Control circuit for an optical pickup head in an optical disk drive |
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