A7 B7 五、發明說明（f) 本發明有關光學資料（audio-video disc)再生裝置 (player)，尤指其有關適應（adaptive)控制法。 光學碟片的讀取裝置，如數位聲音-影像碟片（CD ROM disc)讀取器、或資料碟片讀取器，爲先進的多媒體電腦 系統的一個基本裝備。 ‘資料碟片讀取裝置控制系統的相關前案包括美國專利 號4,485,337,4,783,774,5,289,097,5,246,479以 及5,345,347。 上述的有關前案，分別提供有效的裝置或方法以達成 創作的目的。但，配合應用程式所運作的資料讀取率 (data reading rate)，似有需要提供一方法供控制聲 音影像碟片的驅動轉軸旋轉速度，以便能夠降低所消耗的 電能。 圖示的簡要說明 第一圖揭示聲音影像碟片再生裝置的機械、電子元件 示'意圖。 第二圖揭示本發明方法的流程圖。 經濟部智慧財產局員工消费合作社印製 (請先閱讀背面之注意事項再填寫本頁) 如第一圖所示，聲音影像碟片再生裝置包含一讀取頭 / 碟片組合體（pickup head/disc assembly)，其內具 有一致動裝置（actuator)ll，此致動裝置11包含一徑向 線圈繞組（coil)、一聚焦（focus)線圈繞組及一致動馬達 (motor)。此致動裝置11將讀取頭（pickup)12定位至碟 片13表面的不同徑向位置上。讀取頭/碟片組合體亦包含 讀取前置放大電路（preamplifier)18，供放大由碟片表 面讀取的資料及伺服（servo)資料。電路18中亦包含一讀 本紙張尺度適用中國國家標準（CNS>A4規格(210 X 297公釐） A7 B7_____ 五、發明說明（之） 取緩衝器（read buffer)，供將所讀取到某一軌道 (track)的資料依序送出。數位信號處理器（DSP) 19接 收由讀取頭/碟片組合體中電路U送來的類比讀取資料。 如習知技術，數位信號處理器19包含一讀取通道類比濾波 器（filter)，其提供類比信號給一脈衝偵測器（未出 示）·。脈衝偵測器的輸出，爲原始的數位讀取資料’被送 至一資料分離器（未出示）。碟片驅動電路中的各元件 15、19，經由一匯流排102，與微處理器10作介面溝通， ，如眾所週知，匯流排102上包含位址、控制、及資料信 號。碟片驅動控制電路進一步包含一伺服控制部份（servo control secti〇n)15，供偵測及處理由碟.片U來的伺服 資料，伺服資料係關於伺服叢訊（Burst)、同步脈衝以 及軌道編號等。伺服控制部份15，經由匯流排102，與處 理器10連結，伺服控制部份15運作而控制有關伺服讀取時 序及控制資料的流動。伺服控制部份;15亦包含伺服控制器 (controller)、類比/數位轉換器及數位/類比轉換器。 經濟部智慧財產局員工消費合作社印製 * (請先，閱讀背面之注^|^項再填寫本頁) 由伺服控制部份15輸出的類比輸出151被送至致動驅動電 路90。致動驅動電路90包含功率放大控制電路，其提供一 致動驅動信號給一功率放大器（power amplifier)，而功 率放大器再依序提供控制電流給致動裝置11。所示之系統 亦包含旋轉馬達控制驅動電路14，供控制讀取頭/碟^•組 合體內之旋轉驅動馬達16，以便帶動聲音影像碟片13。系 統亦包含一主電腦介面17，藉由匯流排171及1〇2，其運作 以提供主電腦（PC)及相關元件間之控制及資料的通M。_ 緩衝記憶體93供以協調主電腦介面17、主電腦間的資料傳 本紙張尺度適用中國國家標準<CNS)A4規格（210 X 297公釐） A7 B7 五、發明說明（3 ) 輸率與主電腦介面17、聲音影像碟片間資料傳輸率之差 異°易言之’緩衝記憶體93暫時貯存由碟片π讀出的聲音 -影像資料。數位信號處理器19亦輸出一回授信號191至數 位式馬達速度控制電路91，此馬達速度控制電路91將回授 信號191與由處理器1〇輸出信號1〇ι作比較。比較之結果 爲，·以資料傳輸率觀點，馬達目前的轉速是否太快或太 慢。此結果被用以控制馬達驅動器14，馬達驅動器14則提 供電能至旋轉驅動馬達16。元件92爲數位/類比轉換器 (DAC)，元件94爲放大器。 下面介紹一特定應用程式所需資料讀取率的兩個計算 方法。假設聲音影像碟片的目前資料讀取率爲Ted，而所 須求出的應用程式的資料讀取率爲Tai^ 方法1 : 假設緩衝記憶體93的已知大小爲BS位元組。首先，量 測緩衝記憶體93被資料塡滿所花的時間△ t，貝[JTap = Tcd —(BS/Δ t) ° 方法2 : 假設緩衝記憶體93內在時點“時的資料大小爲851位 元組，而在t2時的資料大小爲BS2位元組， (1) 如BS2>BSi ’ 則Tap=Tcd—[ (BS2_BSi) / (t2—ti)] 經濟部智慧財產局員工消費合作社印製 (2) 如BSi>BS2，則Tap=Tcd + [ (BSi—吻）/ (t2—ti)] 第二圖的流程揭示本發明的步驟。步驟2〇爲起始。在 步驟2卜將Ted設定爲vmax ’其中Vmax爲此聲音影像碟片 於額定最大的轉速下所對應的資料讀取率。步驟22中，檢 測應用程式是否要求由碟片讀取資料。如果是，於步驟 本紙張尺度適用中國國家標準（CNS>A4規格（210 X 297公釐） A7 B7_ 五、發明說明（4 ) 23，執行存取動作並於其後步驟24中，將資料經由緩衝記 憶體93傳至主電腦。於步驟25，以上述兩方法其中之一， 計算應用程式目前所要求的資料讀取率。於步驟26，檢測 Tap是否大於或等於Vmax。如在步驟26爲非，於步驟27， 將Ted設爲Tap，之後，至步驟28檢測資料讀取及傳輸是否 正確無誤。步驟29中，Ted被再設定爲Vmu。 須注意的是，上述的步驟是在處理器10內執行，且當 步驟27被執行時，處理器10由信號線101送一個信號至速 度控制電路91。馬達速度控制電路91然後指示馬達驅動器 將旋轉驅動馬達16的轉速慢下來，以得到Tcd = Tap的結 果。 ---------1·------------訂-------- (請先13讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）A7 B7 V. Description of the invention (f) The present invention relates to an audio-video disc playback device (player), especially its adaptive control method. An optical disc reading device, such as a digital audio-visual disc (CD ROM disc) reader, or a data disc reader, is a basic equipment of advanced multimedia computer systems. ‘Relevant previous cases of control systems for data disc reading devices include U.S. Patent Nos. 4,485,337, 4,783,774, 5,289,097, 5,246,479, and 5,345,347. The previous cases mentioned above provide effective devices or methods to achieve the purpose of creation. However, in accordance with the data reading rate operated by the application, it seems necessary to provide a method for controlling the rotation speed of the driving shaft of the audio and video disc so as to reduce the power consumption. Brief description of the figures The first figure shows the intention of the mechanical and electronic components of the audiovisual disc reproduction apparatus. The second figure discloses a flowchart of the method of the present invention. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page) As shown in the first picture, the audio-visual disc reproduction device includes a pickup head / disc combination (pickup head / A disc assembly) has an actuator 11 therein. The actuating device 11 includes a radial coil winding, a focus coil winding, and a uniform motor. This actuating device 11 positions the pickup 12 at different radial positions on the surface of the disc 13. The read head / disc combination also includes a read preamplifier circuit 18 for amplifying the data read from the disc surface and servo data. Circuit 18 also contains the paper size that is applicable to the Chinese national standard (CNS > A4 specification (210 X 297 mm) A7 B7_____ V. Description of the invention (the) read buffer for reading to a certain Track data is sent in sequence. Digital signal processor (DSP) 19 receives analog read data sent by the circuit U in the read head / disc combination. As is known in the art, digital signal processor 19 includes A read channel analog filter (filter), which provides an analog signal to a pulse detector (not shown). The output of the pulse detector is the original digital read data and is sent to a data separator ( Not shown). Each component 15 and 19 in the disc drive circuit communicates with the microprocessor 10 through a bus 102. As is well known, the bus 102 includes address, control, and data signals. The chip driving control circuit further includes a servo control part (servo control) 15 for detecting and processing the servo data from the disc U. The servo data is about the servo burst (Burst), synchronization pulse and track. No. etc. The servo control section 15 is connected to the processor 10 via the bus 102, and the servo control section 15 operates to control the flow of servo reading timing and control data. The servo control section 15 also includes a servo controller (controller), analog / digital converter and digital / analog converter. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs * (Please read the notes on the back ^ | ^ before filling out this page) Servo control section 15 The output analog output 151 is sent to the actuation driving circuit 90. The actuation driving circuit 90 includes a power amplification control circuit, which provides a uniform driving signal to a power amplifier, and the power amplifier sequentially provides a control current to Actuating device 11. The system shown also includes a rotary motor control drive circuit 14 for controlling the rotary drive motor 16 in the read head / disc ^ • assembly to drive the audio-visual disc 13. The system also includes a host computer interface 17. With buses 171 and 102, it operates to provide control and data communication between the host computer (PC) and related components. _ Buffer memory 93 for coordination of main power Brain interface 17. Data transmission between the main computer The paper size applies to the Chinese national standard < CNS) A4 specification (210 X 297 mm) A7 B7 V. Description of the invention (3) Output rate and main computer interface 17, Audio and video disc Difference in data transfer rate between slices ° In other words, the 'buffer memory 93 temporarily stores audio-visual data read from the disc π. The digital signal processor 19 also outputs a feedback signal 191 to the digital motor speed control circuit 91. The motor speed control circuit 91 compares the feedback signal 191 with the signal 10 outputted from the processor 10. The comparison result is: • From the perspective of data transmission rate, whether the current speed of the motor is too fast or too slow. This result is used to control the motor driver 14, which provides power to the rotary drive motor 16. Element 92 is a digital / analog converter (DAC), and element 94 is an amplifier. Here are two methods to calculate the data read rate required for a specific application. Assume that the current data read rate of the audio-visual disc is Ted, and the data read rate of the application to be obtained is Tai ^ Method 1: Assume that the known size of the buffer memory 93 is BS bytes. First, measure the time it takes for the buffer memory 93 to fill up with data △ t, [JTap = Tcd — (BS / Δ t) ° Method 2: Assume that the data size of the buffer memory 93 at the time point "is 851 bits Tuple, and the data size at t2 is BS2 bytes. (1) If BS2 > BSi 'then Tap = Tcd— [(BS2_BSi) / (t2—ti)] Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economy (2) If BSi > BS2, then Tap = Tcd + [(BSi-kiss) / (t2-ti)] The flow of the second figure reveals the steps of the present invention. Step 20 is the beginning. In step 2, Ted Set to vmax ', where Vmax is the data read rate corresponding to the audio and video disc at the rated maximum speed. In step 22, it is detected whether the application requires data to be read by the disc. If so, in step this paper size Applicable to Chinese national standard (CNS > A4 specification (210 X 297 mm) A7 B7_ V. Description of the invention (4) 23), execute the access action and in the following step 24, transfer the data to the host computer via the buffer memory 93 At step 25, one of the above two methods is used to calculate the data reading currently required by the application In step 26, check whether Tap is greater than or equal to Vmax. If not in step 26, set Ted to Tap in step 27, and then go to step 28 to check whether the data is read and transmitted correctly. In step 29, Ted It is set to Vmu again. It should be noted that the above steps are executed in the processor 10, and when step 27 is executed, the processor 10 sends a signal to the speed control circuit 91 through the signal line 101. The motor speed control circuit 91 then instructs the motor driver to slow down the rotation speed of the rotary drive motor 16 to obtain the result of Tcd = Tap. --------- 1 · ------------ Order --- ----- (Please read the notes on the 13th page before filling out this page) The paper printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm)