玖、發明說明 (發明說明應敘明：發明所屬之技術領域、先前技術、內容、實施方式及圖式簡 單說明） [發明所屬之領域] 本發明是有關於一種光碟記錄裝置，且特別是有關 於一種對可重複抹寫之光碟片進行記錄之光碟記錄裝置。 [習知技術] 記錄型光碟片有僅可燒錄一次(write once)及可重複 抹寫（erasable)等型式。其中，在可重複抹寫光碟片上的覆 寫記錄，是利用雷射光束(Laser beam)之記錄功率pw及消 去功率Pe兩個雷射功率値之變化。在此情形下，利用記 錄功率Pw使光碟片的記錄膜的狀態由結晶狀態變成非結 晶狀態，以形成坑洞（pit)。此外，利用消去功率Pe使光 碟片由非結晶狀態變成結晶狀態，以消去記錄坑洞（pit)。 光碟片記錄時，雷射功率之最適記錄功率Pwo及最 適消去功率Pe〇是依各個光碟片之種類、記錄裝置、及記 錄速度而有所不同。所以，爲了在進行實際記錄時配合光 碟片的種類、記錄裝置、記錄速度而設定最適記錄功率Pwo 及最適消去功率Peo，先行記錄資料’進行稱之爲最佳功 率控制（Optium Power Control ’ OPC)之記錄功率校正動作 以下說明關於在習知的可重複抹寫光碟片記錄裝置 7215pifl.dco/015(無劃底線) 6 561457 之OPC動作，如圖11所示，於光碟片的記錄面上設置用 來記錄各種資料的資料區域，設有爲了設定雷射光束最適 記錄功率的測試記錄區域之功率校正區域（power Calibration Area，PCA) 。PCA被設於光碟片最內周時’ 是由測試區域及計算區域構成，而測試區域則是由100個 分割區塊(partition)所構成，又各個分割區塊則是由15個 資料格（frame)構成。一次OPC動作使用其中一個分割區 塊，以對應於構成分割區塊的15個資料格之15階段雷射 功率來記錄測試訊號。此測試訊號係由具有基準時間幅τ(τ 在標準速度（1倍速）且頻率4.32MHz之一週期下，約爲 230nsec)的3〜11倍時間幅脈衝列所構成之EFM調頻訊號， 且於資料格上記錄9個左右長度的坑洞。 以雷射光束照射這些資料格，依據檢測由光碟片之 反射光再生測試訊號，並且測定作爲標示各個再生HF(高 周波)訊號之振幅大小的調變度(modulation)!!!。 m=I 11/Itop ...(1) 於此，如圖12所示，111爲根據1 IT之坑洞及地基 (land-坑洞和坑洞中間之部份）之再生HF訊號之振幅，13 爲按照3T之坑洞及地基之再生HF訊號之振幅，Itop是在 地基部份的光反射率。調變度πι爲相對應記錄功率pw而 7215pifl.dc〇/015(無劃底線) 7 561457 變化。 再者，如圖13所示，記錄功率低的時候，因爲再 生訊號的振幅小，調變度m也小；隨著記錄功率Pw變大’ 因爲再生HF訊號的振幅變大，使得調變度m也變大。當 記錄功率Pw大到某一程度的時候，調變度m趨向飽和。 因爲在這飽和開始之附近的記錄功率Pw記錄時’跳動和 誤差是最小的，故可以將此時之記錄功率値判定爲最適記 錄功率Pwo。 按照調變度m來決定最適記錄功率Pwo的時候’ 也可用由調變度m之特性求得之下列參數r之方法。 7 =(dm/dPw)x(Pw/m) …(2) 亦即，參數r爲調變度m特性微分之結果。光碟片 是將作爲預溝槽絕對時間（Absolute Time In Pregroove， ATIP)資料的參數γ之目標値r target預先記錄。於此， 如圖6所示，可由上式根據調變度m之特性求得參數7 之特性，來求得目標値target之記錄功率値Ptarget。又， 光碟片裡的ATIP資料，因爲預先記錄從ptarget求得最適 記錄功率Pwo之係數P，可以使用此係數，依據下式來求 得最適記錄功率Pwo。发明 Description of the invention (the description of the invention should state: the technical field to which the invention belongs, the prior art, the content, the embodiments, and the drawings are briefly explained) The invention relates to an optical disc recording device for recording a rewritable optical disc. [Known technology] Recordable discs are available in write once and erasable types. Among them, the overwrite recording on the rewritable optical disc uses the change in the laser power 値 between the recording power pw and the erasing power Pe of the laser beam. In this case, the state of the recording film of the optical disc is changed from the crystalline state to the non-crystalline state using the recording power Pw to form a pit. In addition, the erasing power Pe is used to change the optical disc from an amorphous state to a crystalline state to erase a recording pit. When recording on an optical disc, the optimum recording power Pwo and optimum erasing power Pe0 of the laser power differ depending on the type of each optical disc, the recording device, and the recording speed. Therefore, in order to set the optimal recording power Pwo and the optimal erasing power Peo in accordance with the type of the optical disc, the recording device, and the recording speed during actual recording, the data is recorded in advance to perform the so-called Optimum Power Control (OPC). Recording power correction operation The following description is about the OPC operation of the conventional rewritable optical disc recording device 7215pifl.dco / 015 (without underline) 6 561457, as shown in FIG. 11, which is set on the recording surface of the optical disc The data area for recording various data is provided with a power calibration area (PCA) for a test recording area for setting the optimum recording power of the laser beam. When the PCA is set at the innermost periphery of the disc, it is composed of a test area and a calculation area, and the test area is composed of 100 partitions, and each partition is composed of 15 data cells ( frame) composition. An OPC operation uses one of the divided blocks to record the test signal at 15 stages of laser power corresponding to the 15 data cells constituting the divided block. This test signal is an EFM FM signal composed of a 3 to 11 times time amplitude pulse train with a reference time amplitude τ (τ at a standard speed (1x speed) and a period of frequency 4.32MHz, about 230nsec), and in The data grid records about 9 pits of about length. These data cells are irradiated with a laser beam, and a test signal for reproducing the reflected light from the optical disc is detected, and a modulation !!! is measured as the amplitude indicating the amplitude of each reproduced HF (high frequency) signal !!!. m = I 11 / Itop ... (1) Here, as shown in FIG. 12, 111 is the amplitude of the reproduced HF signal based on the 1 IT pit and ground (land-pit and the middle part of the pit) , 13 is the amplitude of the reproduced HF signal of the 3T pit and the ground, and Itop is the light reflectance at the ground. The modulation degree π is the corresponding recording power pw and 7215pifl.dc0 / 015 (without underline) 7 561457 is changed. Furthermore, as shown in FIG. 13, when the recording power is low, the modulation degree m is small because the amplitude of the reproduction signal is small; as the recording power Pw becomes larger, because the amplitude of the reproduction HF signal becomes larger, the modulation degree m also becomes larger. When the recording power Pw reaches a certain level, the modulation degree m tends to be saturated. Since the 'jitter and error' of the recording power Pw near the start of saturation are minimized, the recording power 値 at this time can be determined as the optimum recording power Pwo. When determining the optimum recording power Pwo according to the modulation degree m, the following parameter r obtained from the characteristics of the modulation degree m can also be used. 7 = (dm / dPw) x (Pw / m)… (2) That is, the parameter r is the result of the differentiation of the modulation degree m characteristic. The optical disc is recorded in advance as a target 値 r target which is a parameter γ of Absolute Time In Pregroove (ATIP) data. Here, as shown in FIG. 6, the characteristic of the parameter 7 can be obtained from the above formula according to the characteristic of the modulation degree m to obtain the recording power 値 Ptarget of the target 値 target. In addition, the ATIP data in the optical disc is recorded in advance to obtain the coefficient P of the optimum recording power Pwo obtained from ptarget. This coefficient can be used to obtain the optimum recording power Pwo according to the following formula.
Pwo= ρ X Ptarget …（3) 72l5pifl.dco/015 憮劃底線) 8 然後，將此設定作爲訊號記錄時之記錄功率而使 用。又，最適消去功率Pe〇係使用在光碟片裡被紀錄爲ATIP 資料之係數ε (消去/記錄功率比）及係數/c (低速記錄用消 去/記錄功率比補償係數），由最適記錄功率Pw〇設定。Pwo = ρ X Ptarget… (3) 72l5pifl.dco / 015 (underlined) 8 Then, use this setting as the recording power for signal recording. In addition, the optimum erasing power Pe0 uses the coefficient ε (erasing / recording power ratio) and coefficient / c (low-speed erasing / recording power ratio compensation coefficient) recorded as ATIP data in the optical disc, and the optimum recording power Pw 〇Setting.
Peo= ε x Pwo ...(4)Peo = ε x Pwo ... (4)
Peo= /c x ε x Pwo ...(5) [欲解決的問題點] 在可重複抹寫光碟片已形成坑洞之已記錄區域，於 覆寫記錄時，也會在未記錄之測試記錄區域使用進行之 OPC動作所設定雷射光束的最適記錄功率Pwo及最適消 去功率Peo。然而，在高記錄功率下被記錄訊號之已記錄 區域若非以某程度之高消去功率來消除訊號的話，要完全 消除是不可能的。 以往，在光碟片上覆寫的記錄特性（劇烈跳動jitter* 及區塊誤差率block error rate等）爲原本坑洞之記錄狀態 (記錄的深度），也就是說因爲沒有完全考慮相關的、比調 變度m還大之被操控因素，原本坑洞之記錄狀態因此會有 所謂在光碟片上記錄時之記錄特性產生惡化的問題。又爲 了使在光碟片上覆寫記錄時之記錄特性向上提昇，而設定 高的記錄功率及消去功率，如此使得坑洞之記錄深度變 7215pifl.dco/015(無劃底線) 9 561457 大，會有光碟片之耐久性惡化的問題。 本發明爲以上述幾點爲借鏡，提昇於光碟片上覆寫 之記錄特性’提供能使光碟片的耐久性向上提高之光碟片 記錄裝置之目的。 [解決問題點的手段] 於專利申請範圍第1項記載之發明爲關於一種對可 重複抹寫之光碟片進行記錄之光碟記錄裝置，該光碟記錄 裝置包括： 一種於光碟片上覆寫記錄時，再生前述光碟片的一 已記錄區域進行覆寫記錄部份，量測已記錄部份之調變度 的調變度量測裝置。 一種於記錄功率可變的可重複抹寫之光碟片之測試 記錄區域進行記錄，基於利用最佳功率OPC動作由前& 所定測試區域之再生訊號所得到各記錄功率之調變度，m 得到各記錄功率及調變度之關係，求得與前述已記錄區士或 調變度相對應之已記錄記錄功率的已記錄記錄功率計算 置。 一種從光碟片之種類及記錄速度相對應之調變度予頁 先設定之對照表，求得與前述光碟之種類及記錄速度相g 應之目標調變度的目標調變度求取裝置。 7215pifl.dc〇/015(無劃底線) 10 一種當前述目標調變度在前述已記錄部調變度以上 時，將覆寫記錄功率設定在前述已記錄功率以上之値，當 前述目標調變度未達前述已記錄部調變度時，將覆寫記錄 功率設定在前述已記錄功率以下之値，設定覆寫記錄功率 之裝置。 以前述覆寫記錄功率對前述光碟片已記錄區域進行 覆寫。 爲此，爲了當目標調變度在已記錄部調變度以上 時，將覆寫記錄功率設定在已記錄功率以上之値，則使記 錄功率設定在OPC動作下測得之記錄功率以下之値，期 待確保記錄精度之結果；且一方面也要確保光碟片及記錄 裝置等之耐久性，在可能的情況下也逐漸提高增大可以得 到良好記錄精度之記錄功率。又爲了當目標調變度在未達 已記錄部調變度時，將覆寫記錄功率設定在已記錄功率以 下之値，一方面要維持良好記錄特性之狀態，在可以確保 光碟片及記錄裝置耐久性情況下，能夠慢慢降低記錄功 率。 於專利申請範圍第2項記載之發明爲關於一種對可 重複抹寫之光碟片進行記錄之光碟記錄裝置，該光碟記錄 裝置包括： 7215pifl.do_5(無劃底線) 561457 一種於覆寫記錄時，再生前述光碟片之已記錄區域 進行覆寫記錄，量測已記錄部份之調變度之調變度量測裝 置。 一種於記錄功率可變的可重複抹寫之光碟片之測試 記錄區域進行記錄，基於利用OPC動作由前述所定測試 區域之再生訊號，所得到各記錄功率之調變度，而得到各 記錄功率及調變度之關係，求得與前述已記錄區域調變度 相對應之已記錄記錄功率的已記錄記錄功率計算裝置。 一種基於前述OPC動作得到之各記錄功率和調變度 之關係，根據各記錄功率和調變度而求得基本調變度參數 的關係之調變度參數計算裝置。 一種根據前述OPC動作得到之各記錄功率和調變度 之關係以及前述各記錄功率和調變度參數，求得由前述光 碟讀出之目標調變度參數所對應之目標調變度之目標調變 度計算裝置。 一種當前述目標調變度在前述已記錄部調變度以上 時，將覆寫記錄功率設定在前述已記錄功率以上之値；當 前述目標調變度未達前述已記錄部調變度時，將覆寫記錄 功率設定在前述已記錄功率以下之値之設定裝置。 其中，以前述覆寫記錄功率對前述光碟片之已記錄 7215pifl.dco/015(無劃底線) 12 561457 區域進行覆寫。 如此，根據在OPC動作得到之各記錄功率和調變度 之關係，以及各記錄功率和調變度參數之關係，爲了從光 碟讀出之目標調變度參數求得所對應之目標調變度，在光 碟之種類及記錄速度相對應之調變度未依照對照表設定之 情況下也可適用，爲了目標調變度在已記錄部調變度以上 時，將覆寫記錄功率設定在已記錄功率以上之値，則將記 錄功率設定在OPC動作下測得之記錄功率以下之値，期 待確保記錄精度之結果，且一方面也要確保光碟片及記錄 裝置之耐久性，在可能的情況下也逐漸提高增大可以得到 良好記錄精度之記錄功率。又爲了當目標調變度在未達已 I己錄部g周變度時，將覆寫記錄功率設定在已記錄功率以下 之値，一方面要維持良好記錄特性之狀態，在可以確保光 碟片及記錄裝置耐久性情況下，能夠慢慢降低記錄功率。 於專利申請範圍第3項記載之發明爲關於申請範圍 第1項及第2項記載之光碟片的記錄裝置，該光碟記錄裝 置包括： 一種前述覆寫記錄功率之設定方法，當前述目標調 變度在前述已記錄部調變度以上時，覆寫之記錄功率是根 據前述OPC動作得到之各記錄功率和調變度之關係，來 7215pifl.dco/015(無劃底線) 13 561457 設定最適覆寫記錄功率。 爲此，爲了當目標調變度在已記錄部調變度以上 時，將覆寫記錄功率設定在已記錄功率以上，能夠確保高 記錄精度，在OPC動作下測得之最適記錄功率Pwo，爲 配合此時點欲記錄之光碟片及裝置之最適合被判斷之記錄 功率，也可以充分確保耐久性。 爲讓本發明之上述和其他目的、特徵、和優點能更 明顯易懂，下文特舉一較佳實施例，並配合所附圖式，作 詳細說明如下·_ [圖式之簡單說明] 第1圖繪示本發明之光碟片記錄裝置一實施例之方 塊示意圖； 第2圖繪示覆寫時OPC動作之第1實施例的流程圖; 第3圖繪示覆寫時OPC動作之第1實施例的流程圖; 第4圖繪示覆寫時OPC動作之第1實施例的另一流 程圖； 第5圖繪示覆寫時OPC動作之第1實施例的另一流 程圖； 第6圖繪示於測試記錄時記錄功率和調變度、r之 關係示意圖； 7215pifl.dco/015(無劃底線) 14 561457 第7圖繪示覆寫時OPC動作之第2實施例的流程圖; 第8圖繪示覆寫時OPC動作之第2實施例的流程圖; 第9圖繪示覆寫時OPC動作之第2實施例的另一流 程圖； 第10圖繪示覆寫時OPC動作之第2實施例的另一 流程圖； 第11圖繪示用於說明光碟片之測試記錄區域之示 意圖。 第12圖繪示用於說明調變度m之示意圖。 第13圖繪示用於說明在0PC中記錄雷射功率和調 變度之關係之示意圖。 [圖式標號說明] 20 :光碟片 22 :軸Peo = / cx ε x Pwo ... (5) [Problems to be solved] In the recorded area where pits have been formed on the rewritable disc, when overwriting the record, it will also be recorded in the unrecorded test record. The area uses the optimum recording power Pwo and optimum erasing power Peo of the laser beam set by the OPC operation performed. However, it is impossible to completely erase the recorded area of the signal being recorded at a high recording power without erasing the signal with a certain high erasing power. In the past, the recording characteristics (violent jitter *, block error rate, etc.) overwritten on the optical disc were the original pit recording status (recording depth), that is, because the relevant The variability m is also a large manipulated factor, so that the original recording state of the pits has a problem of deterioration in the recording characteristics when recording on an optical disc. In addition, in order to improve the recording characteristics when recording overwrites on the optical disc, a high recording power and erasing power are set, so that the recording depth of the pit becomes 7215pifl.dco / 015 (without underline) 9 561457. The problem that the durability of the optical disc deteriorates. The present invention aims at providing the optical disc recording device capable of improving the durability of the optical disc upwards by taking the above points as a mirror and improving the recording characteristics of overwriting on the optical disc. [Means for Solving Problems] The invention described in the first item of the scope of the patent application relates to an optical disc recording device for recording a rewritable optical disc. The optical disc recording device includes: when overwriting records on the optical disc, A modulation measurement device that reproduces a recorded area of the aforementioned optical disc to overwrite the recorded portion, and measures the modulation degree of the recorded portion. A kind of recording is performed in a test recording area of a rewritable optical disc with variable recording power. Based on the optimum power OPC action, the modulation degree of each recording power obtained from the reproduction signal of the test area determined by the front & is obtained by m The relationship between the recording power and the modulation degree is calculated by calculating the recorded recording power corresponding to the recorded recording power or the modulation degree. A device for obtaining a target modulation degree of a target modulation degree corresponding to the type of the optical disc and the recording speed g from a comparison table set in advance based on the modulation degree corresponding to the type of the optical disc and the recording speed. 7215pifl.dc〇 / 015 (Underlined) 10 When the target modulation degree is higher than the recorded part modulation degree, the overwrite recording power is set to be higher than the recorded power, when the target modulation is When the degree does not reach the modulation degree of the recorded part, the device for setting the overwriting recording power to be lower than the previously recorded power is set. The recorded area of the optical disc is overwritten with the overwrite recording power. Therefore, in order to set the overwrite recording power to be higher than the recorded power when the target modulation degree is higher than that of the recorded part, the recording power is set to be lower than the recording power measured under the OPC operation. The result of ensuring the recording accuracy is expected; on the one hand, it is also necessary to ensure the durability of the optical disc and the recording device, and if possible, gradually increase and increase the recording power to obtain a good recording accuracy. In addition, in order to set the overwrite recording power below the recorded power when the target modulation degree is less than the recorded part modulation degree, on the one hand, it is necessary to maintain a good recording characteristic, and to ensure the optical disc and the recording device. In the case of durability, the recording power can be gradually reduced. The invention described in item 2 of the scope of patent application relates to an optical disc recording device for recording a rewritable optical disc. The optical disc recording device includes: 7215pifl.do_5 (without underline) 561457 When overwriting records, A modulation measurement device that reproduces the recorded area of the aforementioned optical disc for overwriting recording, and measures the modulation degree of the recorded portion. Recording is performed in a test recording area of a rewritable optical disc with variable recording power. Based on the reproduction signal of the predetermined test area using the OPC action, the modulation degree of each recording power is obtained, and each recording power and The relationship between the modulation degree and the recorded recording power calculation device corresponding to the modulation degree of the recorded area is obtained. A modulation parameter calculation device based on the relationship between the recording power and the modulation degree obtained by the aforementioned OPC operation, and obtaining the relationship between the basic modulation parameter based on the recording power and the modulation degree. A target modulation of the target modulation degree corresponding to the target modulation degree parameter read out by the optical disc according to the relationship between the recording power and modulation degree obtained by the foregoing OPC operation and the foregoing recording power and modulation degree parameters Variability calculation device. One is to set the overwrite recording power to be higher than the recorded power when the target modulation is above the modulation of the recorded part; when the target modulation is not equal to the recorded part, A setting device for setting the overwrite recording power to a value below the previously recorded power. Among them, the recorded area of the aforementioned optical disc 7215pifl.dco / 015 (without underline) 12 561457 is overwritten with the aforementioned overwrite recording power. In this way, according to the relationship between the recording power and the modulation degree obtained in the OPC operation, and the relationship between the recording power and the modulation parameter, the corresponding target modulation degree is obtained in order to read the target modulation parameter from the optical disc. It can also be applied when the modulation degree corresponding to the type of disc and the recording speed is not set according to the comparison table. In order to set the overwrite recording power to the recorded value when the target modulation degree is above the modulation degree of the recorded part Above the power, the recording power is set below the recording power measured under the OPC operation. It is expected to ensure the accuracy of the recording. On the one hand, it is also necessary to ensure the durability of the optical disc and the recording device. When possible, Also gradually increase the recording power which can obtain good recording accuracy. In order to set the overwrite recording power to be lower than the recorded power when the target modulation degree is less than the g-cycle variation of the recorded part, on the one hand, it is necessary to maintain a good recording characteristic and ensure the optical disc In the case of the durability of the recording device, the recording power can be gradually reduced. The invention described in item 3 of the scope of patent application is a recording device for the optical disc described in items 1 and 2 of the scope of application. The optical disc recording device includes: a method for setting the recording power for overwriting, when the target is adjusted When the degree is above the modulation degree of the recorded part, the overwritten recording power is based on the relationship between the recording power and the modulation degree obtained by the aforementioned OPC operation. 7215pifl.dco / 015 (without underline) 13 561457 Set the optimal coverage Write recording power. Therefore, in order to set the overwrite recording power to be higher than the recorded power when the target modulation degree is higher than that of the recorded part, to ensure high recording accuracy, the optimal recording power Pwo measured under the OPC operation is With the best recording power of the disc and device to be recorded at this time, durability can also be fully ensured. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is described below in detail with the accompanying drawings as follows. [Simplified description of the drawings] Fig. 1 shows a block diagram of an embodiment of the optical disc recording device of the present invention; Fig. 2 shows a flowchart of the first embodiment of the OPC operation during overwriting; Fig. 3 shows the first embodiment of the OPC operation during overwriting; FIG. 4 shows another flowchart of the first embodiment of the OPC operation during overwriting; FIG. 5 shows another flowchart of the first embodiment of the OPC operation during overwriting; FIG. 6 Figure shows a schematic diagram of the relationship between recording power and modulation degree, r during test recording; 7215pifl.dco / 015 (without underline) 14 561457 Figure 7 shows a flowchart of the second embodiment of the OPC action during overwriting; Fig. 8 shows a flowchart of the second embodiment of the OPC operation during overwriting; Fig. 9 shows another flowchart of the second embodiment of the OPC operation during overwriting; Fig. 10 shows an OPC operation during overwriting Another flowchart of the second embodiment; FIG. 11 is a schematic diagram for explaining a test recording area of an optical disc. FIG. 12 is a schematic diagram for explaining the modulation degree m. Fig. 13 is a schematic diagram for explaining the relationship between recording laser power and modulation degree in the OPC. [Explanation of reference numerals] 20: Optical disc 22: Shaft
24 : CPU 26 :伺服迴路 28 :光讀取頭 30 :再生迴路 32 : ATIP解碼器 34 :解碼器 7215pifl .dco/015(無劃底線) 15 38 :調變度測定迴路 4〇 : A/D轉換器 42 : D/A轉換器 44 :記錄迴路 46 :編碼器 5 0 :動作模式指示部 [較佳實施例] 圖1表示本發明光碟記錄裝置一實施例之方塊圖， 如圖中，光碟片2〇是以軸22爲中心被主軸馬達驅動旋轉， CPU24是依據從上方裝置供給的寫入/讀出命令，提供指 令給伺服迴路26。伺服迴路26進行對上述主軸馬達之 CLV(線速度固定)伺服控制，同時進行光讀取頭28之雪橇 馬達旋轉控制，使光讀取頭28移動至光碟片20上預記的 區塊，且依照光讀取頭28之聚焦伺服器，進行尋軌伺服 控制。 從光讀取頭28發射之雷射光束被光碟片20之記錄 面反射，反射光被光讀取頭28檢測。以光讀取頭28得到 之再生HF訊號提供給再生迴路30，於此被放大之再生HF 訊號傳送至伺服迴路26，同時於再生迴路30內接受EFM 解調後，ATIP訊號被分離出而傳送到ATIP解碼器32。 7215pifl.dco/015(無劃底線) 16 561457 此外，取得同步的解調訊號被傳送至解碼器34進行 CIRC(付合 Cross-Interleave Reed-Solomon)解碼，修正錯 誤後，再輸出再生資料。ATIP解碼器32對ID號碼及各 種參數等ATIP資料進行解碼，再傳送給CPlj24及伺服迴 路26。 又，再生迴路30之輸出再生訊號傳送至調變度偵 測迴路38。調變度偵測迴路38量測再生HF訊號之調變 度m。以A/D轉換器40將調變度m數位化後，再提供給 CPU24。 CPU24依據上述調變度m產生記錄功率控制訊號， 此記錄功率控制訊號再由D/A轉換器42被類比化成記錄 功率控制電壓後，提供給記錄迴路44。編碼器46依據 CPU24之控制，將輸入之記錄訊號進行交叉交錯李德所羅 門編碼（Cross-Interleave Reed-Solomon Code ’ CIRC) ’ 以 供給記錄迴路44。 在記錄時，記錄迴路44將編碼器46所供給之訊號 進行EFM，此調變訊號會驅動控制記錄功率控制電壓相對 應之記錄功率，傳送至光讀取頭內之雷射二極體（LD)而 加以驅動。由此，雷射光被照射在光碟片20上，進行訊 號記錄。 7215pifl.dc〇/015(無劃底線) 17 561457 又CPU24之內建記憶體(RAM)中記憶之前OPC(記 錄功率校準）的記錄，也就是說，之前被測定的最適記錄 功率。此OPC記錄可以被保存一定時間。 更且CPU24之內建記憶體(RAM)中，設定光碟片的 種類(ID碼)和對應記錄速度之m値（目標調變度mwo)之對 照表都被一同設定在其中，並且設定對應光碟片種類的 OPC起始功率及步進功率的對照表，及對應光碟片的種類 之參數r。又，從動作模式指示裝置50來的指示輸入是 提供至CPU24。 圖2及圖3表示CPU進行覆寫記錄時之OPC動作 之第一實施例的流程圖。此實施例爲CPU24之內建記憶 體所記載光碟片ID碼相對應之目標調變度mwo被記憶時 之OPC動作。 於圖2中，在步驟S10從動作模式指示部50 —指 示覆寫記錄，CPU24就在步驟S12從原有的已被記錄坑洞 的已記錄區域之寫入錄開始位置，再生一定長度的區 塊。接著在步驟S Μ偵測再生部份的調變度mini。 其次’於步驟S 16將記錄速度設定在記錄指令的指 定値。以步驟S18從光碟片20取得記錄成ATIP資料之ID 碼，判別光碟片的種類（媒體的種類）。其次，於步驟S20 7215pifl .dco/015(無劃底線) 18 561457 將光碟片種類及記錄速度相對應之m値（目檫調變度 mwo)，和預先設定在CPU24之內建記憶體裡對照表的光 碟片種類及記錄速度，做一參照以讀取目標調變度mwo。 然後，於步驟S22選擇CPU24之內建記憶體中與記錄速 度相對應之對照表，在步驟S24之記錄功率Pw，從上述 選擇的對照表中已設定的起始功率，以步進功率爲一單位 做15階段的變化，記錄光碟片20之測試記錄區域之測試 訊號。 接著，於步驟S26再生上述之測試記錄部份。於步 驟S28測定15階段記錄功率Pw的每個調變度m，得到圖 6實線所顯示之特性。然後，於步驟S30，從15階段記錄 功率Pw每個調變度m的關係（圖6實線所顯示之特性）， 可求得調變度mini相對應之記錄功率Pini。接著，於步驟 S32，目標調變度mwo相對應之最適記錄功率Pwo可從圖 6實線所示特性求得。 接著，進入圖3之步驟S34，比較調變度mini和目 標調變度mwo，於步驟S36判定兩者的大小關係。於此， mwo 2 mini的時候，在步驟S38將記錄功率P設定成Pini， 再進入步驟S42 ;而當mwo<mini的時候’於步驟S40將 記錄功率P設定成Pini.X，再進入步驟S42。再者，X爲 7215pif 1 .dco/015(無劃底線) 19 561457 CPU24預先被設定成小於1的値(例如0.95)。 也就是說’於步驟S40，前一次記錄時之調變度mini 在比圖1所示裝置之目標調變度mwo大的時候，此次之 記錄功率P比前一次記錄時之記錄功率Pini降低一定比 例。 在接下來的步驟S42，將〇pc動作數量化。再者， 在此步驟使用光碟片20裡記錄成ATIP資料的係數ε及 /c，從(4)(5)式設定最適消去功率Peo。之後於步驟S42開 始覆寫記錄。 如上所述，設定覆寫記錄之記錄功率。在mwo 2 mini 的狀態，爲了把經常記錄功率當作記錄功率Pini而覆寫記 錄，將記錄功率設定比在OPC動作測定之最適記錄功率 Pwo低之値，如此光碟片和和記憶裝置之耐久性可向上提 昇；而mwcxmini時，爲了比前次記錄時之記錄功率Pini 有一定比例的降低，反覆於此狀態之記錄功率與在OPC 動作被測定之最適記錄功率接近，一方面維持記錄特性之 良好狀態，可使確保光碟片及記憶裝置等耐久性之記錄功 率慢慢降低。24: CPU 26: Servo circuit 28: Optical pickup 30: Regeneration circuit 32: ATIP decoder 34: Decoder 7215pifl.dco / 015 (without underline) 15 38: Modulation measurement circuit 4: A / D Converter 42: D / A converter 44: Recording circuit 46: Encoder 50: Operation mode indicator [preferred embodiment] FIG. 1 shows a block diagram of an embodiment of the optical disc recording device of the present invention. As shown in the figure, the optical disc The chip 20 is driven and rotated by the spindle motor with the shaft 22 as the center, and the CPU 24 provides a command to the servo circuit 26 based on a write / read command supplied from an upper device. The servo circuit 26 performs servo control of the CLV (fixed linear velocity) of the above-mentioned spindle motor, and simultaneously performs rotation control of the sled motor of the optical pickup head 28, so that the optical pickup 28 moves to a pre-recorded block on the optical disc 20, and The tracking servo control is performed in accordance with the focus servo of the optical pickup 28. The laser beam emitted from the optical pickup 28 is reflected by the recording surface of the optical disc 20, and the reflected light is detected by the optical pickup 28. The regenerative HF signal obtained by the optical pickup 28 is provided to the regenerative circuit 30, where the amplified regenerative HF signal is transmitted to the servo circuit 26, and after receiving EFM demodulation in the regenerative circuit 30, the ATIP signal is separated and transmitted To ATIP decoder 32. 7215pifl.dco / 015 (without underline) 16 561457 In addition, the demodulated signal obtained by synchronization is transmitted to the decoder 34 for CIRC (Cross-Interleave Reed-Solomon) decoding. After correcting the error, the reproduced data is output. The ATIP decoder 32 decodes ATIP data such as the ID number and various parameters, and transmits it to the CPlj24 and the servo circuit 26. The output reproduction signal from the reproduction circuit 30 is transmitted to the modulation detection circuit 38. The modulation degree detection circuit 38 measures the modulation degree m of the regenerated HF signal. The modulation degree m is digitized by the A / D converter 40 and then supplied to the CPU 24. The CPU 24 generates a recording power control signal according to the above-mentioned modulation degree m. This recording power control signal is analogized into a recording power control voltage by the D / A converter 42 and is then supplied to the recording circuit 44. The encoder 46 performs the cross-interleaved Reed-Solomon Code (CIRC) encoding of the input recording signal according to the control of the CPU 24 to supply the recording circuit 44. During recording, the recording circuit 44 performs EFM on the signal supplied by the encoder 46. This modulation signal will drive and control the recording power corresponding to the recording power control voltage and transmit it to the laser diode (LD) in the optical pickup head. ) To drive. As a result, the laser light is irradiated on the optical disc 20 to perform signal recording. 7215pifl.dc0 / 015 (Unlined) 17 561457 The previous OPC (Recording Power Calibration) record is stored in the built-in memory (RAM) of CPU24, that is, the optimal recording power measured before. This OPC record can be kept for a certain period of time. In addition, in the built-in memory (RAM) of the CPU 24, a comparison table for setting the type of disc (ID code) and the corresponding recording speed m 値 (target modulation degree mwo) is set therein, and the corresponding disc is set. A comparison table of the OPC starting power and step power of the film type, and a parameter r corresponding to the type of the optical disc. The instruction input from the operation mode instruction device 50 is provided to the CPU 24. 2 and 3 are flowcharts showing the first embodiment of the OPC operation when the CPU performs the overwrite recording. This embodiment is an OPC operation when the target modulation degree mwo corresponding to the disc ID code recorded in the built-in memory of the CPU 24 is memorized. In FIG. 2, in step S10, the operation mode instructing unit 50 instructs to overwrite the recording, and in step S12, the CPU 24 reproduces a certain length of area from the original recording start position of the recorded area of the recorded hole. Piece. Then, the modulation degree mini of the reproduction part is detected in step SM. Next, at step S16, the recording speed is set to the designation of the recording instruction. In step S18, the ID code recorded as the ATIP data is obtained from the optical disc 20, and the type of the optical disc (type of media) is determined. Next, in step S20 7215pifl .dco / 015 (without underline) 18 561457 compare the type of the disc with the recording speed m 値 (eye modulation degree mwo) and compare it with the pre-set memory in the CPU24. Table the type of disc and recording speed, make a reference to read the target modulation degree mwo. Then, in step S22, a comparison table corresponding to the recording speed in the built-in memory of the CPU 24 is selected. In step S24, the recording power Pw is selected from the set starting power in the above-mentioned selected comparison table, and the step power is used as a The unit is changed in 15 stages, and the test signal of the test recording area of the optical disc 20 is recorded. Then, the test recording portion described above is reproduced in step S26. At step S28, each modulation degree m of the 15-stage recording power Pw is measured, and the characteristics shown by the solid line in FIG. 6 are obtained. Then, in step S30, the relationship between each modulation degree m of the power Pw (characteristic shown by the solid line in FIG. 6) is recorded from the 15 stages, and the recording power Pini corresponding to the modulation degree mini can be obtained. Next, in step S32, the optimum recording power Pwo corresponding to the target modulation degree mwo can be obtained from the characteristics shown by the solid line in FIG. Next, the process proceeds to step S34 in FIG. 3, and the modulation degree mini and the target modulation degree mwo are compared, and the magnitude relationship between the two is determined in step S36. Here, when mwo 2 mini, set the recording power P to Pini in step S38, and then proceed to step S42; and when mwo < mini ', set the recording power P to Pini.X in step S40, and then proceed to step S42 . In addition, X is 7215 pif 1. Dco / 015 (without underline) 19 561457 The CPU 24 is set in advance to less than 1 (for example, 0.95). In other words, at step S40, when the modulation degree mini at the previous recording is larger than the target modulation degree mwo of the device shown in FIG. 1, the recording power P at this time is lower than the recording power Pini at the previous recording. a proportion. In the next step S42, the 0pc operation is quantified. Furthermore, in this step, the coefficients ε and / c recorded as ATIP data in the optical disc 20 are used, and the optimum erasing power Peo is set from the equations (4) and (5). Thereafter, overwriting of the record is started at step S42. As described above, the recording power of the overwrite recording is set. In the state of mwo 2 mini, in order to overwrite the recording with the regular recording power as the recording power Pini, the recording power is set to be lower than the optimal recording power Pwo measured in the OPC operation, so the durability of the optical disc and the memory device Can be raised upwards; while mwcxmini, in order to reduce the recording power Pini at the previous recording to a certain percentage, the recording power repeated in this state is close to the optimal recording power measured in the OPC operation, on the one hand, maintaining good recording characteristics The state can gradually reduce the recording power to ensure the durability of optical discs and memory devices.
著重在確保記錄精度的情況，mwo 2 mini之狀態 時，也可以將最適記錄功率設作記錄功率。一連串OPC 7215pifl.dco/015(無劃底線) 20 561457 動作的內容（圖6所示特性），只有在一定時間之歷程記錄 被保持在CPU24內之記憶體(RAM)。連續在不同的區域 覆寫記錄時，可利用即將〇PC前的値（圖6所示特性）， 於測定進行覆寫記錄區域之調變度mini後，跳過步驟 S16〜32，和經歷之OPC値做比較。 此處，以圖4表示圖3之變化例。於圖4，以步驟 S38’替換步驟S38。於此步驟S38’ ，以Ρίηί·Υ設定記錄 功率Ρ，進入步驟S42。Υ爲於CPU24預先設定超過1之 値(例如1.05)。此即’依照pini設定記錄功率P，其中， 再生已記錄區域所得調變度mini相對應之記錄功率Pini， 有一定比例（γ)比記錄功率p高’如此可以期待確保更高 之記錄精度，且可以確保光碟片及記錄裝置等之耐久性。 又反覆進行步驟S38’ ，於〇pc動作測定之記錄功 率會逐漸接近最適記錄功率Pw〇。一方面可以確保光碟片 及記錄裝置等之耐久性’也可以慢慢接近能夠充分確保記 錄精度之記錄功率。再以圖5表示圖3之變化例’於圖4， 以步驟S38，，替換步驟838，於此步驟S38’’，以最適功率 Pwo設定記錄功率P進入步驟S42。此變化例乃是爲了可 適用於前述著重在確保記錄精度的情況。本來欲記錄在 OPC動作被記錄的最適記錄功率Pwo，配合光碟片及記錄 7215pifl .dco/〇 15(無劃底線) 561457 裝置此時點有最適合判斷記錄之記錄功率’可以充分確保 耐久性。. 圖7及圖8表示CPU24進行覆寫記錄時之0PC動 作第2實施例之流程圖。此實施例爲CPU24之內建記憶 體（ROM)所裝載光碟片ID碼相對應目標調變度mwo沒有 被記錄情況下之OPC動作。 於圖7，步驟S110從動作指示部一指示覆寫記錄。 CPU24於步驟S112從原有坑洞已被記錄之原記錄區域寫 入記錄開始位置，再生一定長度之區塊，接著於步驟S114 測定再生部份之調變度mini。 接著，於步驟S116將記錄速度設定在記錄指令之 指定値。於步驟S118從光碟片20取得以ATIP資料被記 錄之ID碼，以判別媒體(光碟片）之種類。接下來，於步驟 S122選擇與記錄速度相對應CPU24內建記憶體內之對照 表，以在步驟S124之記錄功率Pw，從上述選擇對照表設 定之起始功率，以步進功率爲一單位，使之作15階段之 變化，於光碟片20之測試記錄區域記測試訊號。 接著，於步驟S126再生上述測試記錄部份。於步 驟S128測定15階段記錄功率每一個調變度m，可得到圖 6實線所示特性。然後，從步驟S 130，15階段記錄功率每 7215pifl.dco/015(無劃底線) 22 561457 一個調變度m之關係（圖6貫線所不特性），用（2)式可求 得15階段記錄功率每一個參數7。上述調變度m相對應 之參數T也在圖6曲線以破折線表不。 更且，於步驟S131光碟片之ATIP資料內目標値r target相對應之記錄功率Ptarget，可從圖6破折線所示參 數7之特性求得。接者’於步驟S132將上述Ptarget乘以 ATIP資料內之係數P以求得最適記錄功率Pwo。於步驟 S134，最適記錄功率Pwo之相對應調變度mwo，可從圖6 實線所示調變度πι之特性求得。然後，於步驟S136，上 述調變度mwo成爲目標調變度。 接著，進入圖8之步驟S138，調變度mini相對應 之記錄功率Pini可從圖6實線所示調變度m之特性求得。 然後進入步驟S140,比較調變度mini與目標調變度mwo ’ 於步驟S142判別兩者大小關係。此處，mwo^nini的情況 下，於步驟S144將Pini設定成記錄功率P後進入步驟 S148;另一方面，mwo<mini的情況下’於步驟S146將Pini’X 設成記錄功率後，進入步驟S148。又，X爲被CPU24預 先設定成小於1的値(例如〇·95)。 也就是說，於步驟S146前次記錄時之調變度mini(於 圖1所示裝置以外之記錄裝置被記錄之情況也可得到）， 7215pifl.dco/015(無劃底線) 23 561457 比圖1所示裝置之目標調變度 mwo大之情況，使此次記 錄功率P比前次記錄時之記錄功率Pini降低一定之比例。 接著於步驟S148結束OPC動作，又於此步驟，使 用光碟片中以ATIP資料記錄之係數ε及/c，從(4)(5)式設 定最適消去功率Peo。然後，於步驟S150開始覆寫記錄。 根據此實施例，在設定覆寫記錄之記錄功率時，於 mwo > mini的情況，以經常記錄功率成爲調變度最小値之 記錄功率Pini覆寫記錄，藉由將記錄功率設定成比在0PC 動作測定之最適記錄功率Pwo低，光碟片及記錄裝置等之 耐久性會向上提昇；mwo<mini之情況，使之比前次記錄 時之記錄功率Pini降低一定比例，重複於此狀態下之記錄 功率會接近於OPC動作測得之最適記錄功率pwo，一方 面可維持記錄特性之良好狀態，可使能確保光碟片及記憶 裝置等耐久性之記錄功率慢慢降低。 又著重在確保記錄精度的情況，mwo 2 mini之狀態 時，也可以將最適記錄功率設做記錄功率。一連串OPC 動作的內容（圖6所示特性），在一定時間之歷程記錄被保 持在CPUMS內之記憶體(RAM)。連續在不同的區域覆 寫記錄時，可利用即將OPC前的値（圖6所示特性），於 測定進行覆寫記錄區域之調變度mini後，跳過步驟 7215pifl.dco/015(無劃底線) 24 561457 SI 16〜138，和歷程記錄之0PC値做比較。 此處，以圖9表示圖8之變化例。於圖9，以步驟 S144’替換步驟S144，於此步驟S144，，以Pini.Y設定記 錄功率p進入步驟S148，且Y爲於CPU24預先設定超過 1之値（例如1.05)。此即，依照Pini設定記錄功率P，其 中’再生已記錄區域所得調變度mini相對應之記錄功率 Pini ’有一定比例（γ)比記錄功率p高，如此可以期待 確保更高之記錄精度，且可以確保光碟片及記錄裝置等之 耐久性。 又反覆進行步驟S144’ ，於OPC動作測定之記錄 功率P逐漸接近最適記錄功率Pwo，一方面可以確保光碟 片及記錄裝置等之耐久性，也可以慢慢接近能夠充分確保 記錄精度之記錄功率。再以圖10表示圖8之變化例，於 圖1〇，以步驟S144”替換步驟S144，於此步驟S144，，， 以最適功率Pwo設定記錄功率進入步驟SM8此變化例乃 是爲了可適用於前述著重在確保記錄精度的情況，本來欲 S己錄在〇PC動作被記錄的最適記錄功率Pwo，配合光碟 片及記錄裝置此時點有最適合判斷記錄之記錄功率，可以 充分確保耐久性。 再者，步驟S12、S14、S112、S114爲與專利申請 7215pif 1 .dco/015(無劃底線) 25 561457 範圍記載之調變度測定方法相對應。步驟s24〜s3 sm〜⑽、S138與已記錄之記錄功輯算方_對應， 步驟S18、S20與目標調變度之求取方法相對應，步驟 S34〜S4()、S14()〜Sl46與覆寫記錄功率之設定方法相對應， 步驟S13"0周變度參數之計算方法相對應，步驟 Sl；31〜S136與目標調變度之求取方法相對應。 [發明之效果] 如以上所述，申請範圍第i項所記載之發明，當目 標調變度在已記錄部目標調變度以上時，因爲將記錄功率 6又疋成已記錄之記錄功率，也設定比在QpC動作測定之 記錄功率低之記錄功率，因此光碟片及記錄裝置等之耐久 性會向上提昇。又當目標調變度在未達已記錄部調變度 時’因爲覆寫記錄功率設定在已記錄功率以下之値，因此 可要維持良好記錄特性之狀態，且在可以確保光碟片及記 錄裝置耐久性情況下能夠慢慢降低記錄功率。 申請範圍第2項所記載之發明，因爲根據OPC動作 得到之各記錄功率和調變度之關係，以及各記錄功率和調 變度參數之關係，由光碟讀出之目標調變度參數求得所對 應之目標調變度之目標調變度，在光碟之種類及對應記錄 速度之調變度未設定在對照表之情況下也可適用。目標調 7215pifl.dc〇/015 憮劃底線) 26 561457 變度在已記錄部調變度以上時’因爲將覆寫記錄功率設定 在已記錄功率以上之値’所以確保光碟片及記錄裝置之耐 久性，且能夠確保高的記錄精度。又當目標調變度在未達 已記錄部調變度時，因爲將覆寫記錄功率設定在已記錄功 率以下之値，故对以維持良好^錄特性之狀悲’且在可以 確保光碟片及記錄裝置耐久性情況下能夠慢慢降低記錄功 申請範圍第3項所記載之發明，當目標調變度在已 記錄部調變度以上時’因爲將光碟片上覆寫記錄功率設定 在已記錄功率以上，故能夠確保高記錄精度。因爲在OPC 動作下測得之最適記錄功率Pw〇,係被判斷爲配合欲記錄 之光碟片及裝置之時點最適合之記錄功率，因此也可以充 分確保耐久性。 雖然本發明已以較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者，在不脫離本發明之精 神和範圍內，當可作些許之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者爲準。 72l5pifl.dc〇/015(無劃底線) 27The focus is on ensuring the recording accuracy. When the mwo 2 mini is in the state, the optimal recording power can also be set as the recording power. A series of OPC 7215pifl.dco / 015 (without underline) 20 561457 actions (characteristics shown in Figure 6), only the historical records of a certain period of time are kept in the memory (RAM) in the CPU 24. When continuously overwriting records in different areas, you can use 値 (characteristics shown in Figure 6) immediately before 0PC to determine the modulation mini of the overwriting recording area, skip steps S16 to 32, and go through OPC 値 for comparison. Here, a modified example of FIG. 3 is shown in FIG. 4. In Fig. 4, step S38 is replaced with step S38 '. In this step S38 ', the recording power P is set by Pl ?, and the process proceeds to step S42. Υ is set in advance by CPU24 (for example, 1.05). This means 'setting the recording power P in accordance with pini, in which the recording power Pini corresponding to the modulation degree mini obtained by reproducing the recorded area is higher than a certain recording power p (g)', so it can be expected to ensure higher recording accuracy, In addition, the durability of optical discs and recording devices can be ensured. Step S38 'is performed again and again, and the recording power measured at the 0pc operation will gradually approach the optimum recording power Pw0. On the one hand, the durability of the optical disc and the recording device can be ensured ', and the recording power can be gradually approached to ensure sufficient recording accuracy. Fig. 5 shows a modified example of Fig. 3 'in Fig. 4. In step S38, step 838 is replaced. In this step S38' ', the recording power P is set at the optimum power Pwo and the process proceeds to step S42. This modification is intended to be applicable to the case where emphasis is placed on ensuring recording accuracy. The optimum recording power Pwo to be recorded in the OPC operation was recorded. In combination with the optical disc and recording 7215pifl .dco / 〇 15 (without underline) 561457 The device has the recording power that is most suitable for judging the recording at this time, which can fully ensure the durability. 7 and 8 are flowcharts showing the second embodiment of the 0PC operation when the CPU 24 performs overwrite recording. This embodiment is an OPC operation in a case where the ID code of the optical disc loaded in the built-in memory (ROM) of the CPU 24 corresponds to the target modulation degree mwo is not recorded. As shown in FIG. 7, step S110 instructs the operation instruction unit to overwrite the record. The CPU 24 writes the recording start position from the original recording area where the original pit has been recorded in step S112, and reproduces a block of a certain length, and then measures the modulation degree mini of the reproduction part in step S114. Next, in step S116, the recording speed is set to the designated value of the recording instruction. In step S118, the ID code recorded as the ATIP data is obtained from the optical disc 20 to discriminate the type of the medium (optical disc). Next, in step S122, a comparison table in the built-in memory of the CPU 24 corresponding to the recording speed is selected, with the recording power Pw in step S124, the starting power set from the above selection comparison table, and the step power as a unit, so that The 15-stage change of the masterpiece is recorded in the test recording area of the optical disc 20. Then, the test recording part is reproduced in step S126. In step S128, each modulation degree m of the 15-stage recording power is measured, and the characteristics shown in the solid line in FIG. 6 can be obtained. Then, from step S 130, the recording power at each stage of 1515 is 7215pifl.dco / 015 (without underline) 22 561457 A relationship of the modulation degree m (not the characteristic of the continuous line in FIG. 6), and 15 can be obtained by using the formula (2) The phase records the power of each parameter 7. The parameter T corresponding to the above-mentioned modulation degree m is also indicated by a dashed line in the curve of FIG. 6. Furthermore, the recording power Ptarget corresponding to the target 値 r target in the ATIP data of the disc in step S131 can be obtained from the characteristic of parameter 7 shown by the dashed line in FIG. In step S132, the above-mentioned Ptarget is multiplied by the coefficient P in the ATIP data to obtain the optimum recording power Pwo. In step S134, the corresponding modulation degree mwo of the optimum recording power Pwo can be obtained from the characteristics of the modulation degree π shown by the solid line in FIG. 6. Then, in step S136, the above-mentioned modulation degree mwo becomes the target modulation degree. Next, the process proceeds to step S138 in FIG. 8, and the recording power Pini corresponding to the modulation degree mini can be obtained from the characteristics of the modulation degree m shown by the solid line in FIG. 6. Then it proceeds to step S140 to compare the modulation degree mini and the target modulation degree mwo 'at step S142 to determine the magnitude relationship between the two. Here, in the case of mwo ^ nini, set Pini to the recording power P in step S144 and proceed to step S148; on the other hand, in the case of mwo < mini ', set Pini'X to the recording power in step S146, enter Step S148. In addition, X is 〇 (e.g., 0.95) set in advance by the CPU 24 to be less than 1. That is to say, the modulation mini at the previous recording in step S146 (available even when the recording device other than the device shown in FIG. 1 is recorded), 7215pifl.dco / 015 (without underline) 23 561457 In the case where the target modulation degree mwo of the device shown in 1 is large, the current recording power P is lowered by a certain ratio than the previous recording power Pini. Then, the OPC operation is ended at step S148. At this step, the optimum erasing power Peo is set from the formulas (4) and (5) using the coefficients ε and / c recorded by the ATIP data in the optical disc. Then, in step S150, the record is overwritten. According to this embodiment, when setting the recording power of the overwrite recording, in the case of mwo > mini, the recording power Pini is overwritten with the recording power Pini, which is the minimum modulation degree. By setting the recording power to be smaller than The optimum recording power Pwo measured by 0PC action is low, and the durability of optical discs and recording devices will be increased upward; in the case of mwo < mini, it is reduced by a certain percentage compared with the recording power Pini at the previous recording, and repeated in this state. The recording power will be close to the optimal recording power pwo measured by the OPC operation. On the one hand, it can maintain a good state of the recording characteristics, and it can gradually reduce the recording power that can ensure the durability of the optical disc and memory device. It also focuses on ensuring the recording accuracy. When the mwo 2 mini is in the state, the optimal recording power can also be set as the recording power. The content of a series of OPC actions (characteristics shown in Fig. 6), the history of a certain period of time is kept in the memory (RAM) in the CPUMS. When continuously overwriting records in different areas, you can use the 値 immediately before OPC (characteristics shown in Figure 6), and after measuring the modulation mini of the overwriting recording area, skip step 7215pifl.dco / 015 (without a plan) Bottom line) 24 561457 SI 16 ~ 138, and compare with 0PC 値 in the history record. Here, a modified example of FIG. 8 is shown in FIG. 9. In Fig. 9, step S144 'is replaced by step S144'. At this step S144, the recording power p is set with Pini.Y and proceeds to step S148, and Y is set to a value exceeding 1 (e.g., 1.05) in advance by the CPU 24. That is, the recording power P is set in accordance with Pini. Among them, the recording power Pini corresponding to the modulation degree mini obtained by reproducing the recorded area has a certain ratio (γ) higher than the recording power p. In this way, it can be expected to ensure higher recording accuracy. In addition, the durability of optical discs and recording devices can be ensured. Step S144 'is repeated. The recording power P measured during the OPC operation gradually approaches the optimum recording power Pwo. On the one hand, the durability of the optical disc and the recording device can be ensured, and the recording power can be gradually approached to ensure the recording accuracy. Fig. 10 shows a variation of Fig. 8 again. In Fig. 10, step S144 is replaced by step S144 ". At this step S144, the recording power is set at the optimum power Pwo and step SM8 is entered. This variation is applicable to be applicable to The foregoing focuses on ensuring the recording accuracy. The optimum recording power Pwo that was originally recorded in the 〇PC operation was recorded. With the optical disc and the recording device at this time, the recording power that is most suitable for judging the recording can be fully ensured. Steps S12, S14, S112, and S114 correspond to the method for measuring the degree of modulation described in the range of patent application 7215pif 1 .dco / 015 (without underline) 25 561457. Steps s24 to s3 sm to ⑽, S138 and recorded Correspondence of the recording function operator, steps S18 and S20 correspond to the method of obtaining the target modulation degree, steps S34 ~ S4 (), S14 () ~ Sl46 correspond to the method of overwriting the recording power, step S13 & quot The calculation method of the 0-cycle variability parameter corresponds to steps S1; 31 to S136 correspond to the method of obtaining the target modulation degree. [Effects of the Invention] As described above, the invention described in item i of the scope of application, When the goal When the degree of change is above the target modulation degree of the recorded section, the recording power 6 is converted into the recorded recording power and the recording power is set lower than the recording power measured in the QpC operation. Durability will increase upward. When the target modulation degree is less than the recorded part's modulation degree, because the overwrite recording power is set below the recorded power, it is necessary to maintain a state of good recording characteristics, and In order to ensure the durability of the optical disc and the recording device, the recording power can be gradually reduced. The invention described in the second application scope is because of the relationship between the recording power and the modulation degree obtained by the OPC operation, and the recording power and the modulation. The relationship between the degree parameter and the target modulation degree corresponding to the target modulation degree obtained from the target modulation degree parameter read out from the optical disc. When the type of the optical disc and the modulation degree corresponding to the recording speed are not set in the comparison table, Can also be applied. Target adjustment 7215pifl.dc〇 / 015 (underlined) 26 561457 When the degree of change is greater than the degree of adjustment of the recorded part 'because the overwrite recording power is set to the recorded Above the power, the durability of the optical disc and the recording device is ensured, and high recording accuracy can be ensured. When the target modulation degree is less than the recorded part modulation degree, the overwrite recording power is set to Below the recording power, it is sad to maintain good recording characteristics and to slowly reduce the invention described in item 3 of the scope of the recording power application while ensuring the durability of the optical disc and recording device. When the degree of change is greater than the degree of modulation of the recorded portion, 'the recording power on the disc is set to be higher than the recorded power, so high recording accuracy can be ensured. Because the optimum recording power Pw0 measured under the OPC operation is determined by It is determined that the recording power is most suitable for the time point of the optical disc and the device to be recorded, so that the durability can be sufficiently ensured. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of the attached patent application. 72l5pifl.dc〇 / 015 (Underlined) 27