200907948 九、發明說明： 【發明所屬之技術領域】 本發明一般而言係關於光學資料讀取。更特定言之，本 發明係關於在包含空白及寫入磁軌之一任意混合之區域内 一循跡伺服之平穩及穩定性能以允許讀出光點平穩地循跡 預製軌溝（pre-groove)中心。 此申請案主張2007年4月18曰申請的先前申請待審美國 臨時申請案序號60/912,479之權益。 【先前技術】 眾所周知，一光學儲存光碟包括儲存空間之至少 軌’其係以一連續螺旋形式或以多個同心圓形式，在儲存 空内中可以一資料模式之形式來儲存資訊。光碟可能係唯 讀類型，在製造期間中將資訊記錄於光碟上，該資訊只能 由-使用者讀取。光學儲存光碟亦可能係一可寫入類型， 使用者可以將資料館存於光碟上。本發明期望與可寫入光 碟一起使用。因此，下文將針對可寫入光碟之情況明確解 釋本發明而殘望本發明之範相㈣此範例。 二部分寫人光碟之—潛在問題在於，在_空白區域上的 t向疾差化號振幅一 幅。在^ ^ 域之徑向誤差信號振 二;行讀取並搜尋時，讀出光點會不時地進入 轉換（例如空白至寫入或寫」/未循跡飼服在一區域 上，讀出光點摩/ # ”、、 工白）處不受干擾。理想 只出光點應在該些轉換 心。然而，當讀出光點…續循跡預製執溝中 先點從一空白區域移入—寫入區域或反 130640.doc 200907948 之時，徑向伺服迴路之增益將會變化。此點非常不合需 要，由於該迴路僅對於—有限增益範圍穩定。 如所熟知，一種在一光碟之磁軌上維持一讀出光點之方 法係稱為推挽法。此方法涉及產生一循跡誤差信號 (TES)(稱為一推挽信號）。該循跡誤差信號對應於在光碟徑 向軸内的預設誤差信號並由讀出光點與執溝或放置在光碟 表面上的一些其他循跡結構相互作用所引起。一循跡伺服 調整光點之徑向位置以保持該推挽信號在一預定值下。一 般而言，讀出光點係在用於該推挽信號之零交叉點的磁軌 上。 圖1描述習知直流（DC)推挽方法之實施方案。其包括— 光偵測器，其包含兩個區域A1及A2用於偵測光學光點之 反射或透射光束。此光偵測器產生兩個輸出信號八及B， 其係由低通濾波器LPF1及LPF2來加以濾波，從而產生低 頻信號A(DC)及B(DC)。減法構件SUB1決定該等信號 A(DC)及B(BC)之差用於產生用作一循跡誤差信號的低頻 推挽信號PP(DC)之目的。 對於可寫入及可複寫媒體而言，該循跡誤差信號（TEs) 通常自PP信號導出。對於類似於DVD+R/RW及藍光光碟 BD-R/RE之媒體標準，該pp信號之一相關聯參數係「標準 化PP」值’依據藍光光碟定義，該值係讀出光點交又該等 磁軌時PP除以（即標準化）兩倍中心孔徑平均值之波峰至皮 峰（peak-to-peak)值。此"標準化pp"值決定該循跡誤差信號 (TES)之振幅以及因此增益，以及因此徑向伺服迴路之頻 130640.doc 200907948 寬。 對於類似於DVD+R/RW與藍光光碟BD-R/RE之媒體標準 而言，標準化PP比（NPPR)係依據藍光光碟定義為記錄之前 與記錄之後該等標準化PP值之比。對於BD-RE媒體，要求 NPPR位於範圍0.75<NPPR<1.25内，該範圍係一驅動器剛 好能管理的一範圍。然而，許多媒體無法遵守此範圍。特 定言之，新BD-R媒體具有一 NPPR，其實質不同於最佳值 1 ° 曾經開發一解決方案，其允許由一驅動器處理一較大範 圍的NPPR值。該解決方案依據一光碟區域之狀態（即空白 或寫入）來切換伺服增益。該解決方案計算應用於一空白 或一寫入區域之一適當增益並依據該計算來切換伺服增 益。然而，所提出解決方案之一缺點在於假設驅動器能夠 決定用於該兩個區域（即空白或寫入）之適當增益。對於充 分大的區域（即空白或寫入），此決定係可行的。即，在該 類型之一充分較大區域可使用之情況下，驅動器可藉由在 開啟徑向迴路模式下測量其波峰至波峰值來校準在各區域 (即空白、寫入）上的循跡誤差信號（TES)來決定用於該兩個 區域之適當增益。然而，對於禁止循跡誤差信號（TES)之 一開路測量的寫入一單一資料區塊（例如小於用於BLUE-RAY DISCTM之一旋轉）之情況 ，對於在一 式化光碟上的一寫入區域，決定適當增益不可行。 因此需要一種克服先前技術之前述問題之系統及方法， 其在包含空白及寫入磁軌之一任意混合之區域内允許一循 130640.doc 200907948 跡伺服之平穩性能。該系統及方法對於一光碟之空白或寫 入區域該循跡誤差信號（TES)之開路測量不可行之該等情 況’必須允許讀出光點平穩地繼續循跡預製軌溝中心。 【發明内容】 因此’本發明係鑑於上述問題而作出。據此，本發明提 供一種在包含空白及寫入磁軌之一任意混合之一可複寫光 碟的區域内允許一循跡伺服之平穩及穩定性能，以在一光 碟之該等空白或寫入區域之循跡誤差信號（TES)之開路測 置不可行時，允許讀出光點平穩地繼續循跡預製軌溝中心 之方法。 依據本發明之具體實施例，提供在包含空白及寫入磁執 之一任意混合之區域内允許一循跡伺服之平穩及穩定性 能’以對於一光碟之該等空白或寫入區域之循跡誤差信號 (S)之開路測量不可行之該等情況，允許讀出光點平穩 地繼續循跡預製軌溝中心之方法及系統，該方法包含：在 °亥光碟之—預格式化部分内儲存標準化推挽比（NPPR)之標 私值；在—徑向開路模式下獲取聚焦狀態；在徑向開路模 式下測量一循跡誤差信號之振幅，以估算循跡伺服增益 ()’執行磁執捕捉（track capture)，其包含以下步驟： 〇使用该循跡誤差信號（TES)之測量振幅來設定迴路增益； U)關閉該徨向伺服迴路；及iii)循跡用於在磁軌捕捉區域 〜等磁軌之預製軌溝。該方法進一步包含以下步驟：決 疋在5亥磁軌捕捉區域内的該等磁執是否係空白或寫入磁 若决又在該磁軌捕捉區域内的該等磁轨係空白磁轨， 130640.doc 200907948 則指派該循跡誤差信號（TES)之測量振幅至用於空白區域 之一伺服增益，否則指派該循跡誤差信號之測量振 幅至用於寫入區域之一伺服增益；從該光碟之預格式化部 分讀取該標準化NPPR ;若決定在該捕捉區域内的該等磁 軌係空白磁軌’則基於該循跡誤差信號（TES)之測量振幅 與s亥NPPR來估算用於該光碟之寫入區域的伺服器增益，· 及否則’若決定在該捕捉區域内的該等磁軌係寫入磁軌， 則基於該循跡誤差信號（TES)之測量振幅與該NPPr，估算 用於該光碟之空白區域的伺服增益。 本發明之一主要優點在於在選取媒體材料時提供給媒體 製造者之彈性。更特定言之，目前約束性要求（即NppR必 須不旎偏離1 0過多）限制光碟參數之可能範圍，例如預製 軌溝之寬度、深度及斜率，以及記錄之前及之後記錄堆疊 之折射率。此約束具有作用，因為所有該些參數均會影響 pp信號，其進而影響NPPR。本發明克服此限制，因為驅 動器現在可在執行讀取操作時藉由為光碟之寫入及空白區 域一者執行一增益校準並在光碟之轉換區域（例如空白至 寫入與寫入至空白）内切換增益來處理較大PP比。此允許 該等參數在製造期間具有一寬得多的範圍，藉此在選取媒 體材料時提供所需㈣錢—步放寬料減以依據其他 ⑼b信號品質）來加以調譜。例如’目前藍光光碟規 格約束性要求NPPR在0.75<NPPR<125之範圍内本發明 有利地消除此要求。 【實施方式】 130640.doc 200907948 本文令現根據—範例 明本發明，以對於用於^碑方法及裝置來更詳細地說 差信號⑽）之開路測量不可^白或寫入區域之循跡誤 ^ 可仃之該等情況，藉由使讀出 犯平穩地繼續循跡預製軌溝令心來在-光碟之區域轉 換處(例如空白至寫入及宜λ 木社元磲之&域轉 穩性能。 ，，，' 至空白）助於一循跡伺服之平 一圓2示意性顯示-可複寫光碟6之—螺旋狀磁執4。如所 不，可複寫光碟6包含空白磁執35與寫入磁軌3〇之一範例 性混合。該等寫人磁軌3Q係說明為更暗陰影區域。 如上所述’-部分寫人光碟之—潛在問題在於，在一 * 白區域上的徑向誤差信號振幅不同於一寫入區域之徑向誤 差信號振幅。在光碟上讀取並搜尋時，讀出光點會不時地 進入一不同區域類型(即空白或寫入)。此現象發生於所謂 的混合模式區域内，例如圖3所示者。 圖3說明圖2之可複寫光碟6之一片段40,片段40係定義 為-”混合模式”區域’包含空白磁軌…至。與寫入磁軌施 至c之-混合’其間具有轉換。應明白，空白及寫入磁執 之特定組態係僅藉以範例方式提供。 據要求，循跡飼服不應在該些混合模式區域内的區域轉 換處受到干擾。-區域轉換包含（例如）從一空白區域至一 寫入區域之-轉換或反之。理想上，讀出光點應在該此轉 換處平穩地繼續循跡預製軌溝。然而’當讀出光點從一空 白區域移入 ' —寫入區域或；5夕a主 /-. 飞夂之時，徑向伺服迴路之增益將 會變化。如上所指出’此點非常不合需要，由於該迴路一 130640.doc 200907948 般僅對於一有限增益範圍穩定。此問題係藉由在一可複寫 光碟之該等包含空白及寫入磁軌之一任意混合之區域内允 許一循跡伺服之平穩及穩定性能，以在用於一光碟之該等 空白或寫入區域之循跡誤差信號（TES)之開路測量不可行 k允許β賣出光點平穩地繼續循跡預製軌溝中心來克服。200907948 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates generally to optical data reading. More particularly, the present invention relates to the smoothness and stability of a tracking servo in an area containing any mixing of blanks and write tracks to allow readout spots to smoothly track pre-grooves (pre-groove). )center. This application claims the right of pending application pending US Serial No. 60/912,479, filed on April 18, 2007. [Prior Art] As is well known, an optical storage optical disc includes at least a track of a storage space which is in the form of a continuous spiral or a plurality of concentric circular shapes, and in a storage space, information can be stored in the form of a data pattern. The disc may be a read-only type, and the information is recorded on the disc during the manufacturing period. This information can only be read by the user. The optical storage disc may also be of a writable type, and the user can store the repository on the disc. The present invention is expected to be used with a writable optical disc. Accordingly, the present invention will be hereinafter explicitly explained with respect to the case of a writable optical disc, and this example of the present invention is expected. The second part is to write a CD-ROM—the potential problem is that the amplitude of the t-direction difference on the _blank area is one. In the ^^ domain, the radial error signal vibrates; when the line reads and searches, the read spot will enter the transition from time to time (such as blank to write or write) / untracked feed on an area, read There is no interference at the light exit point / # 、, 工白). Ideally, only the light exit point should be in the converted heart. However, when reading the light spot... Continue to track the pre-fabrication ditch to move from a blank area first - The gain of the radial servo loop will vary when writing to the region or counter 130640.doc 200907948. This is highly undesirable since the loop is only stable for a finite gain range. As is well known, a magnetic on a disc The method of maintaining a readout spot on the track is called a push-pull method. This method involves generating a tracking error signal (TES) (referred to as a push-pull signal). The tracking error signal corresponds to the radial axis of the optical disk. The preset error signal is caused by the interaction of the readout spot with the groove or some other tracking structure placed on the surface of the disk. A tracking servo adjusts the radial position of the spot to maintain the push-pull signal at Under a predetermined value. In general, the reading point system Figure 1 depicts an implementation of a conventional direct current (DC) push-pull method, which includes a photodetector that includes two regions A1 and A2 for detection The reflected or transmitted beam of the optical spot. The photodetector produces two output signals, eight and B, which are filtered by low pass filters LPF1 and LPF2 to produce low frequency signals A(DC) and B(DC). The subtraction means SUB1 determines the difference between the signals A(DC) and B(BC) for generating the low frequency push-pull signal PP(DC) used as a tracking error signal. For writable and rewritable media In this case, the tracking error signal (TEs) is usually derived from the PP signal. For media standards similar to DVD+R/RW and Blu-ray Disc BD-R/RE, one of the parameters of the pp signal is "standardized PP". The value 'is defined by the Blu-ray Disc, which is the peak-to-peak value of the PP's average of twice the center aperture when the spot is read and the PP is divided (ie, normalized). This "normalized pp" value determines the amplitude of the tracking error signal (TES) and hence the gain, and thus the radial servo loop frequency 130640.doc 200907948 wide. For media standards similar to DVD+R/RW and Blu-ray Disc BD-R/RE, the Normalized PP Ratio (NPPR) is defined as the ratio of the normalized PP values before and after recording to Blu-ray discs. For BD-RE media, the NPPR is required to be in the range 0.75 <NPPR<1.25, which is a range that a drive can manage. However, many media cannot comply with this scope. Specifically, the new BD-R media has an NPPR that is substantially different from the optimal value of 1 °. A solution was developed that allowed a larger range of NPPR values to be processed by a single driver. The solution switches servo gain based on the state of a disc area (ie, blank or write). The solution calculates the appropriate gain applied to one of the blanks or a write region and switches the servo gain based on the calculation. However, one of the disadvantages of the proposed solution is that it is assumed that the driver can determine the appropriate gain for the two regions (i.e., blank or write). This decision is feasible for a sufficiently large area (ie blank or write). That is, in the case where one of the types is sufficiently large, the driver can calibrate the tracking on each region (ie, blank, write) by measuring its peak-to-wave peak in the open radial loop mode. The error signal (TES) is used to determine the appropriate gain for the two regions. However, for writing a single data block (eg, less than one rotation for BLUE-RAY DISCTM) for one of the open circuit measurement (TES) disables, for a write area on a stereoscopic disc It is not feasible to decide the appropriate gain. There is therefore a need for a system and method that overcomes the aforementioned problems of the prior art, which allows for smooth performance of the 130640.doc 200907948 trace servo in an area containing any mixing of blanks and write tracks. The system and method must be such that the open measurement of the tracking error signal (TES) is not feasible for a blank or write region of a disc. The readout spot must allow the readout spot to continue to track the center of the pre-track. SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above problems. Accordingly, the present invention provides for the smoothness and stability of a tracking servo in an area of a rewritable optical disc containing any one of blank and write tracks, in such blank or write areas on a disc. When the open circuit measurement of the tracking error signal (TES) is not feasible, the method of allowing the readout spot to smoothly continue to track the center of the pre-tracked groove is allowed. In accordance with a particular embodiment of the present invention, it is provided to allow tracking and stabilization of a tracking servo in an area containing any combination of blanks and write magnets to track such blanks or write regions for a disc. The method and system for allowing the readout spot to continue to track the center of the pre-tracked trench smoothly, which method is included in the preformatted portion of the optical disc. Standardized push-pull ratio (NPPR) of the private value; in the radial open mode to obtain the focus state; in the radial open mode to measure the amplitude of a tracking error signal to estimate the tracking servo gain () 'execute magnetic execution Track capture, which includes the following steps: 设定 using the measured amplitude of the tracking error signal (TES) to set the loop gain; U) turning off the steering servo loop; and iii) tracking for the track capture region ~ Pre-made rails of the same track. The method further includes the steps of: determining whether the magnetic poles in the 5 hp track capture area are blank or write magnetically and the magnetic tracks are blank tracks in the track capture area, 130640 .doc 200907948 assigns the measured amplitude of the tracking error signal (TES) to one of the servo gains for the blank area, otherwise assigns the measured amplitude of the tracking error signal to one of the servo gains for the write region; from the disc The preformatted portion reads the normalized NPPR; if the track is determined to be in the capture region, the blank track is estimated based on the measured amplitude of the tracking error signal (TES) and the sig NPPR The servo gain of the write area of the disc, and otherwise 'if the track is determined to be written to the track in the capture area, based on the measured amplitude of the tracking error signal (TES) and the NPPr, the estimate The servo gain for the blank area of the disc. One of the main advantages of the present invention is the flexibility provided to the media manufacturer when selecting media materials. More specifically, the current constraint requirements (i.e., NppR must not deviate too much from 10) limit the possible range of optical disc parameters, such as the width, depth, and slope of the pre-made track, and the refractive index of the recording stack before and after recording. This constraint has an effect because all of these parameters affect the pp signal, which in turn affects the NPPR. The present invention overcomes this limitation because the driver can now perform a gain calibration on the write and blank areas of the disc during the read operation and in the conversion area of the disc (eg, blank to write and write to blank) The gain is switched internally to handle larger PP ratios. This allows the parameters to have a much wider range during manufacture, thereby providing the required (four) money-step relaxation material to be spectrally adjusted according to other (9)b signal qualities when selecting the media material. For example, the present Blu-ray Disc Specification Constraint Requirement NPPR is advantageously eliminated within the scope of 0.75 < NPPR < 125. [Embodiment] 130640.doc 200907948 The present invention is now based on the present invention, in order to describe the open circuit of the difference signal (10) in more detail for the method and apparatus used in the method and the tracking error of the writing area. ^ In the case of such a situation, by making the reading squad continue to track the pre-made track, the heart is transferred to the area of the disc (for example, blank to write and λ 木木社元磲& Stable performance. ,,, 'to blank> Helps a tracking servo to flatten a circular 2 schematic display - rewritable optical disc 6 - spiral magnetic handle 4. If not, the rewritable optical disc 6 includes an exemplary hybrid of a blank magnetic master 35 and a write magnetic track 3 。. The write track 3Q is described as a darker shaded area. As discussed above, the problem is that the radial error signal amplitude on a * white region is different from the radial error signal amplitude of a write region. When reading and searching on a disc, the readout point will enter a different area type (ie blank or write) from time to time. This phenomenon occurs in a so-called mixed mode area, such as that shown in Figure 3. Figure 3 illustrates a segment 40 of the rewritable optical disc 6 of Figure 2, the segment 40 being defined as - "mixed mode" region 'containing blank track ... to. There is a transition between the write-to-track and the -mixing of c. It should be understood that the specific configuration of blanks and write magnets is provided by way of example only. Tracked feeds should not be disturbed at the regional conversions in these mixed mode areas, as required. - Area conversion includes, for example, conversion from a blank area to a write area or vice versa. Ideally, the readout spot should continue to track the pre-tracking groove smoothly at this transition. However, the gain of the radial servo loop will change when the readout spot moves from a blank area into the '-write area' or the 5th day a main /-. fly. As noted above, this is highly undesirable as the loop is stable for only a limited gain range as a result of 130640.doc 200907948. The problem is to allow the smoothness and stability of a tracking servo in an area of any of the rewritable discs including any of the blanks and write tracks to be used for the blanking or writing of a disc. The open-circuit measurement of the tracking error signal (TES) into the region is not feasible. k allows the beta-selling spot to smoothly continue to track the center of the pre-tracked trench to overcome.
依據本發明之一關鍵特徵，當讀出光點從一可複寫光碟 6之一空白區域轉換至一鄰接寫入區域（例如35a至3〇勾或從 一寫入區域至一空白區域（例如從3〇3至35|?)，藉由使用一 預儲存測量伺服增益值或一預儲存估算伺服增益值用於該 徑向伺服迴路之增益，來確保一循跡伺服之平穩及穩定性 能。下面更詳細地說明此程序。 現在參考圖4，說明一程序4〇〇以允許在一包含空白磁軌 35與寫入磁軌之—任意混合之光碟6之混合模式區㈣内 允許-循跡伺服之平穩性能，以對於因為—光碟6之該等 空白區域35或寫人區域3〇過小無法允許聊之—開路測量 而無法獲得用於—光碟6之該等空白區域35或寫人區域3〇 之循跡誤差信號（TES)之開路測量之該等情況，允許讀出 光點平穩地繼續循跡預製軌溝中心。 在製造期間 =步驟繼，於光碟之—預格式化部分内儲存該標準化 隹挽比（NPPR)之-標稱值。此標稱值可 供或另外定義於光碟標準内 應者來k 邱八&瓜而&，先碟之預格式化 ^係以碟之預製軌溝或壓印訊坑㈣之調 之 僅藉由範例方式’特定預製執溝部分可能包括媒體 130640.doc 200907948 預製軌溝之壓印擺動盥所袖 之所HFM係-在藍光光碟 之所明PIC頻帶内擺動的高 ^ 員形式。對於藍光光碟BD- R/RE而έ ，啟動始終係在 禾寫入的所謂PIC頻帶内進 行。故對於一藍光光碟應用， 在從该NPPR估算寫入區域 之增益的同時’校準空白區域 碌之增益。但是應注意，對於 DVD+R/RW應用，反之可能传直杳 係真實的，因為對於dvd+r/rw 應用’資料係以-毗鄰方式來寫入。即，dvd+r/rw格式 並不如同藍光光碟用作一隨機寫入格式。 (.According to a key feature of the invention, the readout spot is switched from a blank area of a rewritable optical disc 6 to an adjacent write area (e.g., 35a to 3 〇 hooks or from a write area to a blank area (e.g., from 3〇3 to 35|?), to ensure the smoothness and stability of a tracking servo by using a pre-stored measured servo gain value or a pre-stored estimated servo gain value for the gain of the radial servo loop. This procedure will be described in more detail. Referring now to Figure 4, a program is illustrated to allow for-tracking servos in a mixed mode region (4) of a disc 6 containing any of the blank track 35 and the write track. The smooth performance is such that the blank area 35 or the write area 3 for the optical disc 6 cannot be obtained because the blank area 35 of the optical disc 6 or the write area 3 is too small to allow chat-open measurement. This condition of the open-circuit measurement of the tracking error signal (TES) allows the readout spot to continue to track the center of the pre-tracked groove smoothly. During manufacturing, the step is followed by storing the standardization in the pre-formatted portion of the disc. Pull Ratio (NPPR) - the nominal value. This nominal value can be used or otherwise defined in the disc standard. k Qiu Ba & melon &, pre-formatted pre-formatted ^ system pre-made track Or the imprinting pit (4) is only by way of example. 'Specific prefabricated ditch section may include media 130640.doc 200907948 Prefabricated gutter embossed 盥 之 之 HF HF HF - - - - - - - - - - - - The form of the internal swing is high. For the Blu-ray Disc BD-R/RE, the start is always performed in the so-called PIC band of the write. Therefore, for a Blu-ray disc application, the gain of the write area is estimated from the NPPR. At the same time 'calibrate the blank area to gain. But it should be noted that for DVD+R/RW applications, the opposite may be true, because the dvd+r/rw application's data is written in an adjacent mode. That is, the dvd+r/rw format is not used as a random write format as a Blu-ray disc.
在啟動期間（在徑向開路模式） 還僅藉以範例方式，光碟之特定壓印訊坑部分可包括一 壓印區域之訊坑，例如-DVD_R/RW光碟之引入區域；預 格式化標頭，例如在DVD_RAM内所存在之該等者；及社 合DVD-R/RW所使用之平台預製訊坑。平台預製訊坑係在 一光碟基板製造期間形成於-預定區域上。提供於一記錄/ 重製裝置（未顯示）内的一拾取器件可使用記錄於該等平台 訊坑内的資訊來容易地移動至—所需位置。而且，該拾取 器件可識別一磁區號碼或類型、一平台/軌溝等，並使用 以平台預製訊坑形式記錄之資訊來執行一伺服控制。 在步驟404 ’在儲存該標準化推挽比之點附近的光碟内 徑附近獲取聚焦狀態。應明白’在内徑而不是外徑附近獲 取焦點要方便得多，以避免從外部至内部之一較長搜索程 序’因為NPPR仍未知，此時在光碟每一區域上進行循跡 不可行或不可靠，故此程序較麻煩。焦點位置係由光碟標 準來定義，且一般位於内徑處。在此位置附近聚焦防止在 130640.doc -13- 200907948 增盈切換正在操作中之前（即在讀取NppR之前）的一較長搜 索程序。 在步驟406’在該徑向開路模式下測量該開路循跡誤差 信號（TES)之振幅，以估算循跡伺服增益（Npp)。在一具體 實施例中，該開路循跡誤差信號（TES)可藉由在一開路模 式下施加循跡伺服並使用一波峰檢測器電路測量tes之波 峰至波峰值來加以測量。此步驟係作為一檢查來執行以決 定讀出光點之位置是否正確（即在捕捉區域内）以及該tes 測量是否可信賴。 在啟動期間（在徑向閉路模式下） 步驟408至412引用用於建立一穩定飼服迴路之磁軌捕捉 程序。為了建立一穩定伺服迴路，在該迴路内的總增益具 有一明確定義值，以便獲得用於振幅及相位邊限的可接受 值。較大地偏離最佳增益值將會引起該捕捉程序失敗，或 甚至其成功時導致不穩定的迴路行為。為了建立一穩定伺 服迴路，依據該磁軌捕捉程序，要求三個步驟：〇)設定迴 路增盃，（2)關閉徑向伺服迴路及（3 )循跡預製軌溝。 在步驟408，即磁執捕捉步驟！，使用在步驟4〇6所測量 之開路循跡誤差信號（TES)來設定迴路增益。 在步驟410，即磁執捕捉步驟2，關閉該徑向伺服迴路。 在步驟412，即磁軌捕捉步驟3，循跡用於在該磁軌捕捉 區域内該等磁軌的預製軌溝。 在步驟414，決定在該捕捉區域内的該等磁軌是否係空 白或寫入。此決定可藉由決定在一徑向閉路模式下在啟動 130640.doc , Λ 200907948 時RF存在或不存在來作出。存在或不存在RF可藉由以一 預定時間間隔來測量功率或RF之RMS值並比較結果與—偵 測位準來作出。在另一具體實施例中，測量一偵測rf位準 之波峰至波谷位準並與一偵測臨限值進行比較。 在步驟416，若在步驟414決定在該磁軌捕捉區域内的該 等磁軌係空白磁執，則指派該循跡誤差信號（TES)之測量 振幅至用於空白區域的一伺服增益。 在步驟418，若在步驟414決定在該磁軌捕捉區域内的該 等磁軌係寫入磁軌’則指派該循跡誤差信號（TES)之測量 振幅至用於寫入區域的一伺服增益。 在步驟420，從光碟讀取該nppr。在一具體實施例中， 此操作可藉由移動光學頭至該NPPR所處之位置，關閉該 循跡飼服迴路及讀取並解碼擺動信號來加以執行。如上所 論述’該NPPR可能儲存於光碟上的其他位置内。 在步驟422，若在步驟414決定在該捕捉區域内的該等磁 軌係空白的’則為寫入區域估算循跡伺服增益。藉由將用 於該等空白區域之計算伺服增益（Npp)乘以該NpPR來估算 用於該等寫入區域之該循跡伺服增益。 磁軌伺服增盃（寫入區域）= Npp(空白區域）* NppR等式[i] 在步驟424 ’若在步驟414決定在該捕捉區域内的該等磁 軌欲寫入’則為空白區域估算該循跡伺服增益。藉由將在 步驟408的計算伺服增益（NPP)除以該NPPR來估算用於該 等空白區域之該循跡伺服增益。 磁軌伺服增益（寫入區域）= Npp (空白區域）/NppR等式[2] 130640.doc •15· 200907948 ，相對於依據等式⑴或(2)來計算飼服增益該 计异係藉由使用該NPPR值來加以執行，該聊⑽係在步 驟420讀取自光碟之一預格式化部分。 在：驟426’在記憶體内儲存計算(估算)词服增益值以 在正常操作期間使用。 範例 再：：考圖3,在正常操作期間，現在說明一範例性情 二：Γ確飼服增益係在步驟422計算(估算)用於該磁軌 之該等寫入區域3〇。在此情況下 却莖社匕障况下，對於-可複寫光碟6之 該專混5模式區域40,在讀出光點從光碟6之一空白區域 35轉換成光碟6之一寫入^ ^ ^ 砍的任何時候，從記憶體擷 磁執之寫人區域的先前計算（估算）伺 :瞬時飼服增益用於該光碟之目前讀取寫入區域28。接 者二在:賣出光點從該光碟之目前寫入區域28轉換至光碟6 之目、空白區域時，從該記憶體擁取在步驟彻所 =飼服增益(贈)用於設定用於該光碟之目 域之伺服增益。 繼續參考圖3 ’在正常操作期間’現在說明-情況，其 中正確伺服增益係計算（估算）用於該磁軌之 域 叫參見上面步驟叫，因為決定用於一光碟之該等空白^ 域之循跡誤差信號（TES)之開路測量不可行。 去據二：於光碟6之該等混合模式區域，例如圖3所示 。以,轉—“㈣35_成料叙—空 域30的任何時候’從記憶體擁取用於該磁軌之空白區域之 130640.doc -16· 200907948 、土计算（估算）伺服增益值（參見上面步驟424)以設定瞬時甸 服曰I用於„亥等空白區域3〇。接著，在讀出光點從—空白 區域30轉換成—相鄰寫入區域35時從記憶體操取該測量 循跡飼服增益（NPP)(參見上面步驟406)以較瞬時词服辦 益用於該光碟之寫入區域35。 9 雖然本文揭示較佳具體實施例，但許多變化例亦可行而 不脫離本發明之概念及範嘴。習知此項技術者在檢查本文 說明書、圖式及申請專利範圍之後應清楚此類變化例。因 此除隨附中請專利範圍之精神及範料，本發明不受 約束。 【圖式簡單說明】 考量結合圖式所考量之本發明之以上實施方案已明白 本發明之該些及其他目標、特徵及優點，其中： 圖1說明一種用於產生一徑向循跡誤差信號之習知循跡 系統。 圖2示意性顯示一 DVD，顯示包括混合模式區域的一螺 旋狀資料磁軌。 ' 圖3係圖2之DVD之一單一混合模式區域之一更詳細圖 解。 圖4包含圖4-1及4-II，係說明一種用以在一 DVD之一混 合模式區域之區域轉變處助於一循跡伺服之平穩性能之程 序的一流程圖。 【主要元件符號說明】 4 螺旋狀磁軌 130640.doc •17- 200907948 6 可複寫光碟 30 寫入磁執 30a 寫入磁軌 30b 寫入磁軌 30c 寫入磁軌 35 空白磁軌 35a 空白磁執 35b 空白磁軌 35c 空白磁軌 40 可複寫光碟6之片段 A1 區域 A2 區域 LPF1 低通遽波器 LPF2 低通遽波器 SUB1 減法構件 130640.doc -18-During startup (in radial open mode), by way of example only, the specific imprinted portion of the disc may include a pit of an imprinted area, such as a lead-in area of a DVD-R/RW disc; a pre-formatted header, For example, those existing in the DVD_RAM; and the platform pre-made pits used by the Social DVD-R/RW. The platform pre-fabricated pits are formed on a predetermined area during manufacture of a disc substrate. A pick-up device provided in a recording/reproducing device (not shown) can be easily moved to the desired position using information recorded in the platform pits. Moreover, the pick-up device can identify a magnetic zone number or type, a platform/track, etc., and perform a servo control using information recorded in the form of a platform pre-pit. At step 404', the focus state is obtained near the inner diameter of the disc near the point at which the normalized push-pull ratio is stored. It should be understood that it is much more convenient to obtain the focus near the inner diameter instead of the outer diameter to avoid a long search procedure from the outside to the inside. Because the NPPR is still unknown, it is not feasible to track on each area of the disc at this time. Unreliable, this procedure is more troublesome. The focus position is defined by the disc standard and is typically located at the inner diameter. Focusing near this position prevents a longer search procedure before the 130640.doc -13- 200907948 gain switching is in operation (ie before reading NppR). The amplitude of the open tracking error signal (TES) is measured in the radial open mode at step 406' to estimate the tracking servo gain (Npp). In one embodiment, the open tracking error signal (TES) can be measured by applying a tracking servo in an open mode and using a peak detector circuit to measure the peak to peak of the tes. This step is performed as a check to determine if the position of the read spot is correct (i.e., within the capture area) and if the tes measurement is trustworthy. During startup (in radial closed mode) steps 408 through 412 reference a track capture procedure for establishing a stable feeding circuit. To establish a stable servo loop, the total gain within the loop has a well-defined value to obtain acceptable values for the amplitude and phase margins. A large deviation from the optimal gain value will cause the capture program to fail, or even lead to unstable loop behavior when it succeeds. In order to establish a stable servo loop, three steps are required according to the track capture procedure: 〇) setting the loop booster, (2) turning off the radial servo loop, and (3) tracking the pre-track trench. At step 408, the magnetic capture step! The loop gain is set using the open tracking error signal (TES) measured in step 4〇6. At step 410, the magnetic capture capture step 2, the radial servo loop is closed. At step 412, track capture step 3, the track is used to track the pre-tracks of the tracks within the track capture area. At step 414, it is determined whether the tracks within the capture area are blank or written. This decision can be made by deciding whether RF is present or not present at 130640.doc, Λ 200907948 in a radial closed circuit mode. The presence or absence of RF can be made by measuring the power or RF RMS value at a predetermined time interval and comparing the result to the -detection level. In another embodiment, a peak-to-valley level of the detected rf level is measured and compared to a detection threshold. In step 416, if the magnetic track is blanked in the track capture area in step 414, the measured amplitude of the tracking error signal (TES) is assigned to a servo gain for the blank area. At step 418, if it is determined in step 414 that the tracks in the track capture region are written to the track ', then the measured amplitude of the tracking error signal (TES) is assigned to a servo gain for the write region. . At step 420, the nppr is read from the optical disc. In one embodiment, this operation can be performed by moving the optical head to the position where the NPPR is located, turning off the tracking feed loop, and reading and decoding the wobble signal. As discussed above, the NPPR may be stored in other locations on the disc. In step 422, if it is determined in step 414 that the tracks in the capture region are blank, the tracking servo gain is estimated for the write region. The tracking servo gain for the write regions is estimated by multiplying the calculated servo gain (Npp) for the blank regions by the NpPR. Track servo booster (write area) = Npp (blank area) * NppR equation [i] In step 424 'If at step 414 it is determined that the tracks in the capture area are to be written ' then blank area Estimate the tracking servo gain. The tracking servo gain for the blank areas is estimated by dividing the calculated servo gain (NPP) at step 408 by the NPPR. Track servo gain (write area) = Npp (blank area) / NppR equation [2] 130640.doc • 15· 200907948, relative to calculating the feeding gain according to equation (1) or (2) This is performed by using the NPPR value, which is read at step 420 from one of the preformatted portions of the disc. At step 426', the calculated (estimated) word gain value is stored in memory for use during normal operation. EXAMPLES Again: As shown in Figure 3, during normal operation, an exemplary scenario 2 is now illustrated: the correct feeding gain is calculated (estimated) in step 422 for the write regions 3 of the track. In this case, in the case of the shackle, for the multiplexable 5 mode area 40 of the rewritable optical disc 6, the read point is converted from one blank area 35 of the optical disc 6 to one of the optical discs 6 written ^^ ^ At any time during the chopping, the previous calculation (estimate) from the memory area of the writer is used to: the instantaneous feed gain is used for the current read write area 28 of the disc. The second is: when the selling spot is switched from the current writing area 28 of the optical disc to the destination or blank area of the optical disc 6, the memory is taken from the memory in the step = the feeding gain (gift) is used for setting. The servo gain in the field of the disc. With continued reference to Figure 3, 'In the normal operation', now explained - the situation where the correct servo gain is calculated (estimated) for the domain of the track is referred to the above step because it is determined for the blank area of a disc. Open measurement of the tracking error signal (TES) is not feasible. According to the second: in the mixed mode area of the optical disc 6, for example, as shown in FIG. To, "(4) 35_information - any time in space 30" from the memory to capture the blank area for the track 130640.doc -16. 200907948, soil calculation (estimate) servo gain value (see above Step 424) is to set the instantaneous 曰I for the blank area 3„. Next, the measured tracking feed gain (NPP) is taken from the memory gymnastics when the readout spot is converted from the blank area 30 to the adjacent write area 35 (see step 406 above) for more immediate use. In the writing area 35 of the optical disc. Although a preferred embodiment is disclosed herein, many variations are possible without departing from the spirit and scope of the invention. Those skilled in the art will be aware of such variations after reviewing the specification, drawings, and claims. Therefore, the present invention is not to be construed as limited by the spirit and scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS These and other objects, features and advantages of the present invention will become apparent from the <RTIgt; The familiar tracking system. Fig. 2 schematically shows a DVD showing a spiral data track including a mixed mode area. Figure 3 is a more detailed illustration of one of the single mixed mode regions of the DVD of Figure 2. Figure 4, comprising Figures 4-1 and 4-II, illustrates a flow chart for a process for facilitating the smooth performance of a tracking servo at a region transition of a mixed mode region of a DVD. [Main component symbol description] 4 spiral track 130640.doc •17- 200907948 6 rewritable optical disk 30 write magnetic hold 30a write track 30b write track 30c write track 35 blank track 35a blank magnetic hold 35b blank track 35c blank track 40 rewritable disc 6 segment A1 area A2 area LPF1 low pass chopper LPF2 low pass chopper SUB1 subtraction component 130640.doc -18-