TW200529212A - High density optical disc for reproducing and recording - Google Patents

Abstract

A high-density optical disc such as a high density-digital versatile disc (HD-DVD) or Bluray disc, and a method for reproducing or recording data of the high-density optical disc. The high-density optical disc includes a lead-in area, a data area and a lead-out area. The lead-in area has control information. A minimum mark or space length of the control information recorded in the data area. The control information of the lead-in area is copied to the lead-out area. On the basis of the data reproduction or recording method, an optical disc device can correctly read and confirm the control information from the high-density optical disc, minimize the interference between a mark and space in high-density recording data, reduce the effects of scratches or dust on the disc, and efficiently prevent an erroneous data reproduction or recording operation.

Description

200529212 发明 、 Explanation of the invention ... [Technical field to which the invention belongs] The present invention relates to a high-density optical disc, such as a high-density digital audio-visual disc (HD-DVD) or a Blu-ray m optical disc including a lead-in area, an area, and an export Area. [Prior art] • Figure 1 illustrates the structure of a conventional digital audio-visual disc (DVD). The DVD 10 has a thickness of 1.2 mm and a diameter of 120 mm. The DVD 10 includes a center hole with a diameter of 15mm and a clamping area with a diameter of 44mm, so that a turntable and a central clamp installed in an optical disc device can clamp the DVD 100 with a pit pattern. A data recording layer based on this is formed on the DVD 10. The distance between the data recording layer and the surface of the optical transmission layer is about 0.6 mm, and the distance is arranged between the data recording layer and the objective lens of the optical pick-up in the optical disc device. The numerical aperture (NA) value of the objective lens of the optical pickup head for this DVD is 0.6. As shown in Figure 2, the thickness of a high-density optical disc 20 (such as a high-density digital audio-visual disc or Blu-ray disc) is 1.2mm and 120mm in diameter. The same-density optical disc 20 includes a central hole with a diameter of 15mm and a refreshing sweet area with a diameter of 44mm, so that the turntable and sweetener installed in an optical disc device can be sweet and high. The density optical disc is 20. The distance between the surface of the data recording layer and a light transmission layer is about 0 · 丨 mm, and the distance is set on the data recording layer and the objective lens (0L) of the optical read-write head in the optical disc device. 200529212 The objective lens of the optical read-write head used in the high-density optical disc has a relatively large numerical aperture value of 0.85 compared with the objective lens of the optical read-write head used in general DVDs. For reproduction or recording, this high density The laser beam used in optical discs has a relatively short wavelength compared with those used in general DVDs, that is, the laser beam used in general DVD 10 has a wavelength of 650 nm, and the laser beam used in this high-density optical disc has a wavelength of 40. 5nm, so that high-density recorded data can be copied or recorded. Therefore, 'when the objective lens of the optical read-write head for a high-density optical disc is close to the recording layer of the high-density optical disc, the optical disc device uses a relatively short wavelength And increase the numerical aperture value of the objective lens, thereby making the beam spot of the laser beam smaller and increasing the intensity of the light falling on the high-density recording layer. Furthermore, it is possible to reduce the transmission of a short wavelength The optical transmission layer of the laser beam. Therefore, the chance of variation in the characteristics and deviation of the laser beam can be minimized. As shown in FIG. 3, the high-density disk includes a lead-in area 201 and a data area 2. 2 and lead-out area 203. The lead-in area contains the recorded control information that must be used to record or copy the high-density disc data, such as information related to the size of the disk, a disk structure, and a data record Density A data area configuration, etc. Therefore, when the high-density optical disc 20 is inserted into the optical disc device, the control information recorded in the lead-in area 201 will be read and confirmed for the first time. The optical disc device will refer to The control message then performs a continuous copy or record operation to copy the data recorded in the data area 202, or the data recorded in the data area 202. In the lead-in area 201, the data area 202, and the lead-out area 20 3, in 200529212 23.3GB high-density optical disc, the channel bit length and data bit length are 80nm and 120nm respectively; in 25GB high-density optical disc, the channel bit length and data bit length are respectively It is 74 5nm and 111.75nm; and in a 27GB high-density optical disc, the channel bit length and data bit length are 69nm and 103.50nm, respectively. The minimum mark / spacing length of the data recorded in these areas 201, 202, and 203 is the same as each other. • As stated elsewhere, the disc device must be read for the first time and being read and confirm the control messages recorded in the lead-in area to reproduce or record the data of the high-density disc. At this time, interference between a mark and a space may appear in the high-density recording data. Furthermore, scratches and dust on the surface of the disc may adversely affect the recording or reproduction of high-density recorded data. Because of this, there is a problem that a control message cannot be read properly, and a data copying or swallowing operation cannot be performed properly. [Summary of the invention] # The present invention is proposed in view of the foregoing deficiency, and aims to propose a high-density optical disc and a method of copying or recording its data so that an optical disc device can correctly read and confirm the recording in a lead-in area Control information, wherein the lead-in area is included in the high-density optical disc, such as a high-density digital audio-visual disc (HD-DVD) or a Blu-ray disc. In one aspect consistent with the present invention, the foregoing and other objects can be achieved by a high-density optical disc, and the high-density optical disc includes at least: a lead-in area, a negative material area, and a lead-out area, which are recorded in the lead-in area. The smallest mark of the data is 200529212 ◎ The minimum mark or pitch length of the data is longer than that recorded in the data or pitch. Preferably, in the high-density gate according to the present invention, the minimum mark or pitch length rj of the data recorded in the lead-in area will be greater than the minimum mark or pitch of the data recorded in the data area. The length is long, and the minimum mark or pitch length of the data recorded in the lead-in area may be the same as or longer than the effective diameter of a laser beam spot. Preferably, in the case where the minimum mark or pitch length of the data recorded in the lead-in area of the high-density optical disc according to the present invention is longer than the minimum mark or pitch length of the data recorded in the data area, the high density The optical disc may further include a specific area in which information related to the minimum mark or space of the data recorded in the lead-in area and the data area may be recorded. 0 In another aspect consistent with the present invention, the system is & A method is provided for copying or recording the data of a high-density optical disc. The steps of the method include at least (a) a program for reading the data recorded in a lead-in area to shift the rotation speed of a spindle motor, and the The program at least includes detecting a rotation speed with a predetermined reference rotation speed; and (b) applying a copy processing algorithm according to the result obtained in step (a) to copy the data recorded in the lead-in area. In another aspect consistent with the present invention, a method is provided for copying or recording data of a high-density optical disc. The method includes at least the following steps: (Read and record from the specific area in the lead-in area and the data area. Information items related to the minimum mark or pitch length of the data, and apply a copy processing algorithm to these information items · 'and (b) according to the result obtained in step (a) to

200529212 Copy the data recorded in the import area. In another aspect consistent with the present invention, a method is provided for recording information on an optical recording medium including a lead-in area, a user data area, and a lead-out area. The method includes at least the following steps: (a) according to control The control signal of the device records the data to be recorded in the user data area; (b) records the first control message in the lead-in area or the lead-out area to control the duplication of the recorded data in the user data area; and (C) Recording a second control message in one of the areas except the lead-in area, the lead-out area, and the user data area to control the copying of the recorded data in the lead-in area or lead-out area, where the second The control message is used to indicate the minimum length of a mark or space recorded in the user data area and the minimum length of a mark or space recorded in the lead-in area or lead-out area, respectively. In another aspect consistent with the present invention, a method is proposed to record information located on an optical recording medium including a lead-in area, a user data area, and a lead-out area. The method includes at least the following steps: (a) basis A control signal of one of the controllers records data to be recorded in the user data area; and (b) records a control message in a specific area other than the user data area to control the recorded data in the user data area The control message includes a message for indicating the minimum length of a mark or space recorded in the user data area and the minimum length of a mark or space recorded in the lead-in or lead-out area, respectively. [Embodiment] A preferred embodiment of a high-density optical disc consistent with the present invention and a data for copying or recording 7 200529212 will be described in more detail below with the accompanying drawings. FIG. 4 is a schematic diagram illustrating a state in which data having different minimum mark / pitch lengths are recorded in a lead-in area and a data area, and these areas are formed by a high-density optical disc conforming to the present invention (for example, A high-density optical disc 30) is provided, such as a high-density digital audio-visual disc (hd_dvd) or a Blu-ray disc including a lead-in area 301, a data area 302, and a lead-out area 303. The lead-in area 301 contains the recorded control information, such as information related to the size of the disk, a disk structure, a data recording density, and a data area, which must be used to record or copy the high-density optical disc data. Configuration and more. The minimum mark / pitch length of the control message recorded in the lead-in area 301 is longer than the minimum mark / pitch length of the general program and audio data recorded in the data area 302. For example, as shown in FIG. 4, the minimum mark length (minimum mark-LIA) of the control message recorded in the lead-in area 3 〇 丨 is longer than the minimum mark length of general program and audio data recorded in the data area 3 02 (Minimum mark one dA) is long. The length of a minimum mark recorded in the lead-in area 301 is the same as or longer than the effective diameter of a laser beam spot, which depends on the effective value associated with the objective lens used for the high-density optical disc and the wavelength of a laser beam Into. As shown in Equation 1 below, the effective diameter of the laser beam spot is approximately 395 nm when the effective value (NA) = 0.85 and λ = 405 nm (0.405 / z m). Equation 1 Laser beam point = 0.83 X = 0.83 X-- = 0.395 // m = 395nm ΝΑ 0.85 In Equation 1 described above, 0.83 is a coefficient and χ is a laser 8 200529212 The wavelength of the beam, and ΝΑ It is an aperture value.

Therefore, the minimum mark length of the control information recorded in the lead-in area 3 01 is the same as or longer than the effective diameter of the laser beam spot of 395 nm. In addition, the minimum mark length of the control message recorded in the lead-in area 301 is longer than the minimum mark length of the program and audio data recorded in the data area 302. At this point, § The minimum pitch length (minimum pitch—LIA) of the control data recorded in the lead-in area 301 is the same as or longer than the effective diameter of the laser beam spot of 395 nm. The minimum pitch length of the control message recorded in the lead-in area 301 is longer than the minimum mark length (minimum pitch _DA) of the program and audio data recorded in the data area 302. Referring to the table shown in Fig. 3 ', the high-density optical disc can have three types of recording density. The three forms of recording density consist of 235

A single layer of Gbytes, 25.025 Gbytes, and 27.020 Gbytes is dominant, and the channel bit length corresponds to each recording density, that is, you 25.025

At Gbytes, the length of "1T" is 74.50nm; in addition, at 27 ...

At Gbytes, the "IT" length is 69.0 nm.

For example, when the recording density is 23.305 Gbytes, the length of the effective diameter of the laser beam 395 ηι 4 5T (3 9 5/8 0 · 00 = 4.93 75ηπι) obtained from Equation 1 is the same. The length of the mark or pitch of the data in the data to be recorded,,, and swallowed is about "2T" to r 8T '^ ". Therefore, if the minimum mark or pitch of the data in the lead-in area is to be recorded, the If the effective diameter is the same or longer, a mark or pitch with a length of Γ ^ and the 5 Τ + length can be recorded as the data of the lead-in area. ”Or the method used to adjust the data recorded in the lead-in area can be changed. Record 9

200529212 The length is "5T" to "8T" or "5T" to "11T" pitch. In addition, in the method of adjusting the data recorded in the lead-in area and adjusting the data in the data area, the length of the same time interval can be increased by the added minimum mark or space. First, because of other marks or spaces, The length can be increased in proportion to the length of the mark or the gap. Therefore, when the method for adjusting the data in the area to be recorded is the same as the method for adjusting the data to be recorded, the lead-in area of "2T" in the data area The length of "5T", the "3T" in the data area should be the length of "7.5T" in the lead-in area, and the data length will be equivalent to the length of "2 0T" in the lead-in area. The length of "" is used instead of "2T" to "8T" mentioned above to cause the impact, that is, the space of the embossed area may occupy the area. However, because the embossed area is generally related to the disk The control information is not necessary. The advantage is that when the same is used in the lead-in area and the data area, the load of the optical disc system can be reduced. On the other hand, in the lead-in area (containing the minimum label "5T" or Longer data) When the data adjustment method is different from the material adjustment method, for example, when the four types of "5T", "6T", "7T", and "8T" are mainly adjusted in the introduction area Advantage, that is, the lead-in area is occupied. However, this will also have some negative effects. For example, a new method or record of a mark or spacer must be designed. The other marks or lengths are increased in proportion to the minimum. The increase is recorded in the guide. The length in the data area will be equivalent to the length of "8T" • 5T "to" 20T "in the phase area. Most worries will be recorded based on most of the available space. There are data adjustment methods. The data with the length of the mark or space that is longer than that of the data area only uses less space for the mark or space. Adjustment method, 10

200529212 and the optical disc system needs to add a new duplication device, which is equivalent to the new demodulation method. As mentioned above, the maximum pitch length of the data recorded in the lead-in area is longer than the minimum mark of the data recorded in the data area, or according to different data adjustment methods (related to the lead-in area). When the disc data is copied or recorded, the information related to the disk needs to be confirmed so that the lead-in area contains the necessary information that needs to be recorded and can be read appropriately. That is, when the minimum mark or pitch length of the lead-in or a data adjustment type is confirmed, the data in the lead-in area can be read appropriately. The information related to the lead-in area needs to record a specific area 1 from the inside of the lead-in area, which is taken when the magnetic disk is sent into the optical disc device. As shown in Fig. 6, a lead-in (BCA) is formed inside the lead-in area. It is preferable that the information related to the lead-in area can be read for the first time when it is recorded > and the data recorded in the lead-in area can be reproduced appropriately (referring to the lead-in area) and copied appropriately, as before Record in that specific area. In addition, Figs. 7A and 7B show a data structure and data content related to coding according to the present invention. For example, a message indicating the minimum mark or pitch length may be recorded in "element 2." The message indicating the minimum mark or pitch that is not the data is in the "third" data bit. A message indicating the type of the lead-in area can be recorded in the "4th" data bit. At this point, when the "first" byte Ιο ,! in the "second" data unit is executed to copy the data of the small area or the long space and the data introduction area, the record is formed, For the first time reading into the blocking area, the BCA uses the information described in the message to make it clear to the BCA the lead-in area. The data and recordable data adjustment class is included in the blbO '' and 11

200529212 "b7b6b5b4b3b2" can be r〇i "and r 〇〇〇〇〇〇. The remaining 15 bytes contained in the "second" data unit can be used to indicate the minimum mark or pitch length of the lead-in area. Similarly, "blbo" and "b7b6b5b4b3b2" contained in the "first" byte 102 in the "third" data unit can be "10" and "000010", respectively. The remaining 15 bytes contained in the "third" data unit can be used to indicate the minimum mark or pitch length of the data area. Similarly, "blbO" and "b7b6b5b4b3b2" contained in the "1st" byte 10,3 in the "4th" data unit can be "11" and "000010", respectively. The remaining 15 bytes contained in the "4th" data unit can be used to indicate the type of data adjustment. FIG. 8 illustrates a system for recording and reproducing data of the high-density optical disc in accordance with the present invention. The system includes a high-density optical disc 50; an optical read / write head 60 for reading and writing data from or recorded on the optical disc 50; a radio frequency (RF) processor for forming an optical The data waveform read by the head 60; a digital signal processor (DSP) 70 ′ is used to convert the data copied by the RF processor, which is used to digitally copy or adjust the data each time, or Each time the data is recorded, the data is demodulated; a buffer memory 80 is used to temporarily store the data, and a controller 90 is used to control the aforementioned parts of the system. The DSP 70 includes a processor 71 for the data area according to a preset demodulation and copy signal processing method, and the method is suitable for copying general data recorded in the data area of the bureau's density disc, And a processor 72 for the lead-in area, which is based on another demodulation and copy signal processing method, and the method is at the maximum 12200529212 when the length of the small mark or pitch has been lengthened or the data of the lead-in area has been Special adjustments are especially suitable for copying data. When the optical disc 50 is loaded into the system and the data read by the optical read-write head 60 from the optical disc 50 is input to the DSP 70 through the rf processor, the controller 90 preferably performs a control operation. So that the demodulation and copy signal processing methods suitable for copying the data (recorded in the lead-in area) can be selected using information (related to the lead-in area) and recorded at the innermost side of the disc. When the minimum mark / spacing length of the data recorded in the lead-in area is the same as or longer than the effective diameter of the laser beam spot, the optical disc device for copying or recording southern density optical disc data can read and record more correctly and Confirm the control message recorded in the lead-in area. Therefore, the interference between a mark and a space in the high-density recorded data will be minimized, and the influence of scratches or dust will also be reduced. Therefore, an erroneous data copying or recording operation can be more effectively avoided. In response to a certain size or a large amount of scratches or dust existing in the lead-in area of the aforementioned high-density optical disc, the control information of the lead-in area can be copied to the lead-out area 403 (as shown in FIG. 5). Next, a method for copying or recording the high-density disc data in a case where the minimum mark or pitch length of the material in the lead-in area is longer than the minimum mark or pitch length of the material in the data area will be described. When the optical disc is loaded, a general disk copying or recording device performs reading of control data recorded in a lead-in area of the magnetic disc, and stores the read message in a memory. When the magnetic disk copy or recording device rotates a spindle horse 13 200529212 to maintain a fixed user data bit rate, the lead-in area, the data area, an inner area, or an outer area will hold a fixed linearity. rate. Therefore, when the mark or pitch length of the data recorded in the lead-in area is the same as that of the data recorded in the lead-in area, the linear rate related to the operation of a disk and used to read the data in the lead-in area Will be equal to the linear rate associated with the operation of the disk and used to read the data in the data area. Therefore, when it is learned that the lead-in area is within a predetermined radius of the optical disc, the speed of the motor of the host vehicle can be predicted. However, if the mark or pitch length of the data recorded in the lead-in area is longer than the mark or pitch length of the data recorded in the data area, when used to maintain the bit rate of the fixed user data (and the lead-in rate) When the linear rate of the zone-related data is faster than the linear rate used to maintain the fixed user data bit rate (relevant to the data zone), the spindle motor speed used to read the data in the lead-in area will become faster than the predetermined speed. For fast. At the same time, if the data density is high, that is, when the mark or pitch length is short or the distance between tracks is narrow, the resolution of the laser beam point will be reduced, and the characteristics of the optical transmission function will be reduced. It becomes difficult for the optical head to read signals that are properly demodulated and reproduced. Because of this, the adjustment method is changed or a demodulation method such as a partial response perfect match (PRML) channel technology or a Viterbi demodulation method (used in a communication system) is used to make the read signal Can be properly demodulated or copied. The demodulation method used to copy the read signal is only applied to the data adjusted by the corresponding adjustment method. The aforementioned demodulation method cannot be used when the data is adjusted by different adjustment methods or the characteristics of the optical transmission function are changed.

200529212 application. Therefore, when the marking of the lead-in area or the long mark or the pitch length is different, the characteristics of the lead-in area and the data transmission function will also be different. Therefore, different signals must be applied to different areas when copying and copying. FIG. 9 is a diagram illustrating a first implementation according to the present invention {illustrating data for recording and copying the high-density optical disc. When the high-density optical disc is fed in and loaded into an optical disc (step S 1 0), the device will A spindle horse is detected to read the record in the lead-in area (rotate the disk based on the user's alternative rate (step S11). The device is compared with a predetermined reference speed (step S12). Here, the predetermined reference speed is an appropriate required speed, and the minimum mark or pitch length of the data in the minimum mark or pitch of the data is the same, and it is intended to be read at a rate. At this time, if the detected speed is high Record the minimum mark of the data recorded in the lead-in area to the minimum mark or pitch of the data in the data area. Use a new copy processing method to make the lead-in area a relatively longer minimum mark or pitch in the lead-in area. The device then determines the reading of the data recorded in the lead-in area (step S14). If the record in the lead-in area is selected, the copy processing method will be converted into a data that is scheduled to be copied and recorded in the data area. , And then execute one (step S15). The optical transmission read signal related to the material area of the data area is used as a demodulation processing method. It is called a flowchart, which is a method. The disc is copied or recorded, At the same time, the bit length of the line of the measured speed in the lead-in area is the length of the data in the lead-in area and the user data bit in the data area is at the reference speed, or the pitch length is longer than the length. The device reads to copy the material (step S13). Whether the material has been completely read and the data has been completely read. The processing method is to copy or record the operation. 15 200529212 Figure ι〇 A flow diagram in accordance with the second embodiment of the present invention illustrates the recording and copying of the high-density disc data The party should have a specific area (in this specific area, the record is imported, and the minimum mark δ of the data area or the pitch is related to the 1-density disc is sent and loaded into a disc copy or recording device S20) , The device reads the message items related to the minimum mark or pitch of the specific area from the disc (step S 2 1) • the device compares the values of the message items (step S22). If it is longer than the minimum mark or pitch length in the input area, the device will use a new copy processor to read in the area to copy the relatively longer minimum in the lead-in area. Distance data (step S23). The device will determine whether the guide data has been completely read (step S24). If the data recorded in the guide has been completely read, the device will make a predetermined copy processing method for the copy processor to copy the record in A copy or record operation is performed in the data area (step S25). φ The foregoing two methods that are compatible with the two implementations of the present invention and can reproduce high-density optical disc data can optionally use an independent tuning method to copy the data recorded in the lead-in area, and a pre-demodulation method to copy the recorded data in The data in the data area.

When there is a lead-in area and a lead-out area (where the same high-density optical disc 40 is fed in and loaded into the optical disc copy set, the device determines whether the control message is read with the first reading and the The control information recorded in the lead-in area 401 and its method. The height and time of several and one compound items: Hours (these areas in the step, and the guide mark or the time method pair should be installed later). The guide mark or the lead-in area of the lead-in area is converted into the data, and the copy or solution copy or control message is recorded) or the installation program is recorded as appropriate. At this time, 16 200529212 If the control message is not properly confirmed, the device will move the optical read-out area 403 and then read the control copied to the lead-out area 403. In this procedure, the device will determine to copy to the lead-out area 403. Has the message been read properly? If the message copied to the lead-out area 403 has not been read properly, the device will determine the error of the incoming disk ejection or recording operation, and then the device will terminate the operation. In general, if the control information is recorded in the lead-in area or lead-out area, the device will appropriately perform a series of copying or recording operations for reading / copying or data in the data area 402. The present invention is disclosed based on the reproduction of magnetic disk data. The method and device applied in the recording of a specific area, records the information required for the data recorded in the lead-in area or optically adjusts the length of the lead-in area with a mark or pitch ( A minimum mark or spacing from the data area). More specifically, the present invention can be easily applied to a host device. The present invention is a method for manufacturing a magnetic disk having a specific area. The identification information related to a lead-in area in a specific area is recorded. The minimum mark or pitch of the data in the lead-in area is long. The minimum mark or pitch length of the data in the data area can be appropriately long. 1 As can be appreciated from the foregoing description, the present invention provides a high density and a method for copying or recording the data. Data method. This method allows a green field to read and confirm the control signal from the high-density disc. The interference between a mark and the pitch in the high-density recording area is minimized, and the effects of scratches and dust on the disc are minimized. And effectively avoid the wrong data duplication operation. Write header to message. The control The control is now copied by the other party. The appropriate reading records that the Ming can copy the minimum length phase, that is, ', and that the degree is better than the stain. The content of the optical disc is reduced, so that the magnetism can be reduced. 17 200529212 b ^ Although the present invention has been disclosed for the purpose of illustration, those skilled in the art should understand the various possible retouching and addition of the present invention. And the replacement should still be made without departing from the scope and spirit disclosed in the scope of patent application of the present invention. [Brief description of the drawings] The above and other objects, features, and other advantages of the present invention will be more clearly understood by the following detailed description and the accompanying drawings. Among them: Figure 1 illustrates a traditional digital video disc (DVD) structure diagram; Figure 2 illustrates the structure of a traditional and high-density optical disc (such as a high-density digital audio-visual disc (HD-DVD) or Blu-ray disc); Figure 3 illustrates a traditional high-density optical disc The lead-in area, data area, and lead-out area provided; Figure 4 is a schematic diagram illustrating a state 'data in the figure with different minimum marks / space lengths are recorded in a lead-in area' and data area, and these The area is provided by a high-density optical disc in accordance with the present invention; FIG. 5 is a schematic diagram showing a state in accordance with the present invention. The control information recorded in the lead-in area (included by the two-density optical disc) is Copy to the lead-out area; Figure 6 illustrates the break-in blocking area (BCA) of a conventional two-density disc; Figures 7 (a) and 7 (b) illustrate a BCA code of the high-density disc of the present invention. Data structure and information 18 200529212 FIG. 8 illustrates a system for recording and copying data of the high-density optical disc according to the present invention; FIG. 9 illustrates a flowchart according to the first embodiment of the present invention, which illustrates Method for recording and copying data of the high-density optical disc; FIG. 10 is a flowchart in accordance with the second embodiment of the present invention, which illustrates a method for recording and copying data of the high-density optical disc. [Simple description of component representative symbols] 10 digital video discs 20 high-density discs 50 high-density discs 60 optical heads 80 buffer memory 70 digital signal processors 71 processors in the data area 72 processors in the lead-in area controller 90

Claims (1)

200529212 The scope of patent application: 1. A high-density optical disc, which includes at least: a lead-in area; a data area; and a lead-out area, in which the minimum mark or pitch length of the data recorded in the lead-in area is longer than that recorded in the The minimum mark or space length of the data in the data area is _ long. 2. The high-density optical disc according to item 1 of the scope of patent application, wherein the minimum mark or pitch length of the data recorded in the lead-in area is equal to or longer than the effective diameter of a laser beam spot. 3. The high-density optical disc as described in item 2 of the scope of patent application, wherein the lead-out area mentioned above contains at least one data item, which is the same as the data recorded in the lead-in area. 4. The high-density optical disc according to item 3 of the scope of patent application, wherein the minimum mark or pitch length in the lead-in area is at least twice the minimum mark or pitch length in the data area. 5 · The high-density optical disc described in item 1 of the scope of patent application, further comprising: a specific area storing information related to the minimum mark or space of the data recorded in the lead-in area and / or the data area . 6 · The high-density light as described in item 5 of the scope of the patent application. The specific area is an intrusion blocking area (Burst BCA). 7. A recording medium comprising at least: φ a lead-in area and / or lead-out area; and a user data area in which a mark or a space formed in the lead-in area is or is to be recorded in the user data area One of them is marked as long, and the record is formed, or is intended to be recorded in the user's record or space, in order to use the Viterbi decoder (viterbi, which contains the information of the mark or space. The length of a minimum mark or pitch in the data area described above, and / or the length of a minimum mark or pitch in the data area is at least 9. The recording medium, and / or the lead-out area, as described in item 7 of the scope of patent application The minimum mark or pitch of Form 1 is not a sharp tool to read. G, where the above Cutting Area, the length is longer than the standard decoder in the record or pitch length data area, which is twice as large in the lead-in area as the user. Viterbi decoding in the lead-in area 21 200529212 1 0. The recording medium as described in item 7 of the scope of patent application, wherein the minimum mark or pitch length of the data recorded in the lead-in area and / or lead-out area is equal to one thunder One of the beam spots has an effective diameter equal or longer. 1 1 · The recording medium described in item 7 of the scope of patent application, wherein one of the lead-in area and / or lead-out area has a light transmission function different from the light transmission function of # in the user data area. 1 2. The recording medium described in item 7 of the scope of patent application, wherein the mark or pitch in the lead-in area and / or lead-out area and the user data area is read optically by the laser beam wavelength (λ) of 405 nm The head is recorded or read. 1 3. The recording medium as described in item 7 of the scope of patent application, which further includes at least: Φ A specific area stores information related to the minimum mark or space of the data recorded in the lead-in area and / or the data area . 14. The recording medium according to item 13 of the scope of patent application, wherein the specific area is a break-in area (BCA). 1 5 · —A device for reading data from a recording medium, including at least: 22 200529212 (a) a signal processor, which includes at least two processing sections for processing records recorded in the lead-in area or the user Data in the data area, and at least one of the two processing sections has a section for a partial response to the exact matching method; and (b) a controller for controlling the signal processor to select the signal One of the two processing sections of the processor separately processes the data recorded in the lead-in area and the user data area. 16. The device according to item 15 of the scope of patent application, wherein the controller selects the first processing section, which has a section for responding to a partial matching method to process the records in the user data. District information. 17. The device according to item 16 of the patent application scope, wherein the section for a partial response full matching method includes a Viterbi decoder. 1 8. The device as described in item 15 of the scope of patent application, wherein the controller may select a second processing section that does not require at least one section for a partial response to the exact matching method to process the record in the lead-in area data of. 19. The device according to item 15 of the scope of patent application, wherein the controller can control data reading according to a light transmission function in the use data area, and the light transmission function in the user data area is different from Light transmission function in lead-in area and / or lead-out area. twenty three