JP2008034023A - Optical disk player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk player which can avoid disk specification violations by disabling the program/random playback function when reproducing necessary warning images or commercial images on an optical disk. <P>SOLUTION: When found that all the bits are logical 0 in UOP 6, 7, 8, 9, and 11 at the start to playback an optical disk, the program reproduction or random playback become possible by carrying out a program to enable the program reproduction function or random setting to enable the random playback function. When found that the bits in UOP6, UOP7, UOP8, UOP9, or UOP11 are logical 1, a disabling program is carried out for disabling the settings of program reproduction function or random playback functions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus that reproduces information recorded on an optical disc, and in particular, reproduces information on an optical disc additionally recorded with user operation control information (UOP) for controlling whether or not a user operation is possible. When setting the program / random playback function.

  In the DVD (Digital Versatile Disc) video optical disc that has become widespread in recent years, the disc maker prohibits user operations for functions such as cueing, skipping, fast-forwarding, fast-rewinding, and menu calling of main information. By writing the user operation control information (UOP), the user operation can be restricted.

By the way, when reproducing information on commercially available DVDs on which movies or music promotions are recorded, the titles are reproduced in order using the title numbers of the titles recorded on the DVD, There are program reproduction in which chapters are reproduced in order using chapter numbers, and random reproduction in which titles recorded on a DVD and chapters in the title are reproduced in a shuffled manner.
JP 2002-269754 A JP 2005-196836 A

  Most of the conventional optical disk playback devices (DVD players) are not equipped with a program / random playback function, and even if the program / random playback function can be achieved, it will be a violation of the disk standard and will be sold. I can't. On commercially available DVDs (DVD-ROMs) on which information such as movies and music promotions are recorded, warning screens and commercial screens showing copyright protection explanations to prevent copying are displayed before the main information is reproduced. Since it must be played, before the warning screen or commercial screen is played, the head of the main information is skipped, and skip, fast forward, fast reverse, and menu call are prohibited by the disc standard. Therefore, when the program / random playback function is set at a warning screen or commercial screen that must be played on a conventional optical disk playback device, the main information is skipped before playback of the warning screen or commercial screen. If the UOP information for prohibiting fast-forward, fast-reverse, and menu calling is not detected, warning screens and commercial screens will be skipped, resulting in the problem of disc breach. .

  In the prior art of Patent Document 1, before starting reproduction, readability control information for each recording unit is read from the recording medium, the user operation that is prohibited is notified to the user, and acceptance of such an instruction is refused. ing. In addition, this conventional technique can avoid the reproduction of a reproduction portion in which heading to another is prohibited, and enables program reproduction and random reproduction. However, this prior art does not specify which UOP bit specifically controls the setting of the program / random playback function, and can set the program / random playback function even in places where playback should not be skipped. As a result, warning screens and commercial screens may be skipped, resulting in violation of standards.

  In the prior art of Patent Document 2, a plurality of programs can be extracted from a portable recording medium based on a program selection condition information table recorded on the portable recording medium, and non-sequential reproduction can be performed using the extracted program. It is like that. However, in this prior art, since the relationship between the program selection condition information table and the UOP information is unknown, there is no disclosure about setting the program / random playback function by specifying the UOP bit.

  The present invention has been made to solve the above problems, and prohibits setting of a program / random playback function during playback of a warning screen or a commercial screen that must be played back on an optical disc. Provided is an optical disc reproducing apparatus that can avoid violations.

  In order to achieve the above object, according to the first aspect of the present invention, the reproduction processing of the optical disk is started, and UOP6 in the user operation control information recorded on the optical disk is read out, and the bit of this UOP6 is logic 1. UOP6 bit determining means for determining whether the bit is logical 0, and when it is determined that the bit of UOP6 is logical 0, UOP7 in the user operation control information recorded on the optical disk is read, and this UOP7 UOP7 bit determining means for determining whether the bit of the UOP7 is logic 1 or logic 0, and when it is determined that the bit of UOP7 is logic 0, of the user operation control information recorded on the optical disc UOP8 bit determining means for determining whether the bit of UOP8 is logical 1 or logical 0, and the UO When it is determined that the 8 bit is logic 0, UOP 9 in the user operation control information recorded on the optical disc is read, and it is determined whether the bit of UOP 9 is logic 1 or logic 0. When it is determined that the UOP9 bit determination means and the UOP9 bit is logic 0, the UOP11 of the user operation control information recorded on the optical disk is read, and whether this UOP11 bit is logic 1 or logic UOP11 bit determination means for determining whether it is 0, and program setting enabling processing that enables setting of the program playback function or setting of the random playback function when the UOP11 bit is determined to be logic 0 A random setting enable processing means for performing random setting enable processing means, and the bit of UOP6 is logic 1 Or if the UOP7 bit is determined to be a logic 1, or if the UOP8 bit is determined to be a logic 1, or the UOP9 bit is a logic 1 If it is determined that the bit of the UOP 11 is logical 1, or if it is determined that the program playback function cannot be set, the program setting disable process or the random playback function cannot be set. There is provided an optical disk reproducing apparatus comprising a system controller having a program for performing random setting impossibility processing / random setting impossibility processing means.

  In this configuration, first, when an optical disk is loaded and a reproduction key is pressed by the user, a reproduction process for the optical disk is started. Then, the UOP6 bit determination means reads UOP6 in the user operation control information recorded on the optical disc and determines whether the bit of this UOP6 is logic 1 or logic 0. The UOP7 bit determination means reads UOP7 in the user operation control information recorded on the optical disc when it is determined that the bit of UOP6 is logic 0, and whether the bit of UOP7 is logic 1 or logic Determine if it is zero.

  When it is determined that the UOP7 bit is logic 0, the UOP8 bit determination means reads UOP8 in the user operation control information recorded on the optical disc, and whether the UOP8 bit is logic 1 or logic. Determine if it is zero. When it is determined that the UOP8 bit is logic 0, the UOP9 bit determination means reads UOP9 in the user operation control information recorded on the optical disc, and whether the UOP9 bit is logic 1 or logic Determine if it is zero.

  When it is determined that the bit of UOP9 is logic 0, the UOP11 bit determination means reads UOP11 in the user operation control information recorded on the optical disc, and whether the bit of UOP11 is logic 1 or logic Determine if it is zero. When it is determined that the bit of UOP11 is logic 0, the program / random setting enable processing means sets the program playback function to enable setting of the program playback function or the random setting to enable setting of the random playback function. Perform processing.

  As described above, the program reproduction or random reproduction can be performed by executing the program setting enabling process for enabling the setting of the program reproduction function or the random setting enabling process for enabling the setting of the random reproduction function.

  When it is determined that the UOP6 bit is logic 1, or when the UOP7 bit is determined to be logic 1, or when the UOP8 bit is determined to be logic 1, Alternatively, when it is determined that the UOP9 bit is logic 1, or when it is determined that the UOP11 bit is logic 1, the program / random setting impossibility processing means of the system controller 22 has a program playback function. A program setting disable process that disables the setting of the random playback function or a random setting disable process that disables the setting of the random playback function is performed.

  As described above, during the reproduction of the portion where the UOP bit is logic 1 (warning screen or commercial screen), the program setting disable processing for making the setting of the program playback function impossible or the setting of the random playback function is disabled. By executing the random setting disabling process that enables it, a warning screen and a commercial screen that must be reproduced on the standard of the optical disc (DVD) can be reproduced, and violation of the disc standard can be avoided.

  According to this configuration, by introducing an algorithm that determines whether or not the program / random playback function can be set, the setting of the program / random playback function is prohibited at locations where playback must be performed, and disc standard violations are avoided. become able to. In other words, when playing information on a commercial DVD that contains movies or music promotions, it is possible to set the program / random playback function without skipping the warning screen or commercial screen that is played first. As a result, the disc standard violation can be avoided.

  According to the second aspect of the present invention, the designated user operation control information necessary for reproduction according to the disc standard is read out from the user operation control information recorded on the optical disc when the reproduction processing of the optical disc is started, and this designated user is read. A designated user operation control information bit determining means for determining whether the bit of the operation control information is logic 1 or logic 0, and a program when it is determined that the bit of the specified user operation control information is logic 0 Program / random setting enabling processing means for performing a program setting enabling process for enabling setting of a playback function or a random setting enabling process for enabling setting of a random playback function, and the bit of the designated user operation control information is logic 1. If it is determined that the program playback function cannot be set, the program setting disable process or random playback function To provide an optical disc reproducing apparatus characterized by comprising a system controller having a program / random setting Call processing means for performing random setting impossible processing to disable the constant, a.

  In this configuration, the reproduction process of the optical disc is started, and among the user operation control information recorded on the optical disc, designated user operation control information necessary for reproduction according to the disc standard is read, and this designated user operation is read out. When it is determined that the bit of the control information is logic 0, a program setting enabling process for enabling setting of the program playback function or a random setting enabling process for enabling setting of the random playback function is performed. When it is determined that the bit of the designated user operation control information is logic 1, program setting disable processing that disables setting of the program playback function or random setting that disables setting of the random playback function is not possible Processing is performed.

  According to this configuration, by introducing an algorithm that determines whether or not the program / random playback function can be set, the setting of the program / random playback function is prohibited at locations where playback must be performed, and disc standard violations are avoided. become able to. In other words, when playing information on a commercial DVD that contains movies or music promotions, it is possible to set the program / random playback function without skipping the warning screen or commercial screen that is played first. As a result, the disc standard violation can be avoided.

  In the invention of claim 3, in the invention of claim 2, since the designated user operation control information necessary for reproduction according to the disc standard is UOP6, UOP7, UOP8, UOP9, UOP11, reproduction according to the disc standard is performed. While the information that needs to be played is reproduced, the head of the main part information can be skipped, skipping of titles and chapters, fast forward, fast reverse, and menu reading can be prohibited.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the system controller starts the reproduction process of the optical disc, reads UOP 6 in the user operation control information recorded on the optical disc, and sets the bit of the UOP 6 UOP6 bit determination means for determining whether it is logical 1 or logical 0, and when it is determined that the bit of UOP6 is logical 0, UOP7 of the user operation control information recorded on the optical disc is Read, UOP7 bit determination means for determining whether the bit of UOP7 is logic 1 or logic 0, and user operation recorded on the optical disc when it is determined that the bit of UOP7 is logic 0 UOP8 in control information is read, and UOP8 determines whether the bit of UOP8 is logic 1 or logic 0 When it is determined that the bit determination means and the bit of UOP8 are logic 0, UOP9 in the user operation control information recorded on the optical disk is read, and whether the bit of UOP9 is logic 1 or logic 0 UOP9 bit determining means for determining whether the UOP9 bit is logical 0, the UOP11 of the user operation control information recorded on the optical disc is read out, and the UOP11 bit is UOP11 bit determination means for determining whether the logic is 1 or 0.

  Therefore, the system controller can realize the UOP 6-bit determination process, the UOP 7-bit determination process, the UOP 8-bit determination process, the UOP 9-bit determination process, and the UOP 11-bit determination process, thereby starting the main information and skipping titles and chapters. It is possible to determine whether fast-forward, fast-reverse, and menu reading are prohibited or permitted.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, when the system controller determines that the bit of the UOP 11 is a logical 0, a program setting enabling process or a random setting that enables setting of a program reproduction function Program / random setting enabling processing means for performing random setting enabling processing for enabling setting of a reproduction function, and when it is determined that the bit of UOP6 is logic 1, or when the bit of UOP7 is logic 1 If determined, or if the UOP8 bit is determined to be a logical 1, or if the UOP9 bit is determined to be a logical 1, or the UOP11 bit is a logical one Program setting disabling process or random playback that makes it impossible to set the program playback function And a program / random setting Call processing means for performing random setting impossible processing to disable the setting ability.

  Therefore, the system controller can realize the program / random setting enabling process and the program / random setting disabling process, thereby permitting the setting of the program / random playback function or prohibiting the setting of the program / random playback function. It becomes possible to do.

  As described above, according to the present invention, the optical disk playback process is started, and UOP 6 in the user operation control information recorded on the optical disk is read, and the bit of UOP 6 is logical 1 or logical 0. UOP6 bit determining means for determining whether or not the bit of UOP6 is logical 0, UOP7 of the user operation control information recorded on the optical disc is read, and the bit of UOP7 is logical 1 UOP7 bit determining means for determining whether the bit is a logical 0 or a UOP7 bit of the user operation control information recorded on the optical disc when the UOP7 bit is determined to be a logical 0, UOP8 bit determination means for determining whether the bit of UOP8 is logic 1 or logic 0, and the bit of UOP8 UOP9 bit determining means for reading UOP9 in the user operation control information recorded on the optical disc and determining whether the bit of this UOP9 is logic 1 or logic 0 when it is determined that it is 0 When it is determined that the bit of UOP9 is logic 0, UOP11 in the user operation control information recorded on the optical disc is read, and whether the bit of UOP11 is logic 1 or logic 0 UOP11 bit determination means for determining and, when it is determined that the bit of UOP11 is logic 0, program setting enabling processing for enabling setting of a program playback function or random setting for enabling setting of a random playback function It is determined that the program / random setting enable processing means for processing and the bit of UOP6 is logic 1 Or if it is determined that the UOP7 bit is a logical one, or if the UOP8 bit is determined to be a logical one, or the UOP9 bit is determined to be a logical one. If the bit of the UOP11 is determined to be logic 1, or the program setting disable process for disabling the setting of the program playback function or the random setting for disabling the setting of the random playback function Since the system controller having the processing program / random setting impossible processing means is provided, an algorithm for determining whether or not the program / random playback function can be set is introduced, so that the program / Random playback function setting is prohibited, and disc standard violation can be avoided. In other words, when playing information on a commercial DVD that contains movies or music promotions, it is possible to set the program / random playback function without skipping the warning screen or commercial screen that is played first. As a result, the disc standard violation can be avoided.

  Further, according to the present invention, the designated user operation control information necessary for reproduction according to the disc standard is read out from the user operation control information recorded on the optical disc when the reproduction process of the optical disc is started, and this designation is performed. When it is determined that the designated user operation control information bit determination means for determining whether the bit of the user operation control information is logic 1 or logic 0, and the bit of the specified user operation control information is logic 0, Program / random setting enable processing means for performing program setting enabling processing for enabling setting of the program playback function or random setting enabling processing for enabling setting of the random playback function, and the bit of the designated user operation control information is logic 1. Program setting disabling process or random player that disables the setting of the program playback function when it is determined System controller having a program / random setting disable processing means for performing random setting disable processing that makes it impossible to set the program, and by introducing an algorithm for determining whether to set the program / random playback function, Setting of the program / random playback function at the place where playback is required is prohibited, and the disc standard violation can be avoided. In other words, when playing information on a commercial DVD that contains movies or music promotions, it is possible to set the program / random playback function without skipping the warning screen or commercial screen that is played first. As a result, the disc standard violation can be avoided.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an optical disc reproducing apparatus according to an embodiment of the present invention.

  The optical disk reproducing apparatus includes a spindle motor 5 that rotates an optical disk (DVD) 1, an optical pickup 2 that emits laser light for reproducing information recorded on the optical disk 1 and receives reflected light from the optical disk 1. A sled 3 for moving the optical pickup 2 in the radial direction of the optical disc 1 and a spindle motor 5 and the sled 3 are driven in accordance with an instruction from the system controller 22 and an objective lens (not shown) built in the optical pickup 2 is shown. And a servo control unit 4 that performs control to move the focal position of the laser beam in the vertical direction and the horizontal direction with respect to the recording surface of the optical disc 1 by moving

  The optical disk reproducing apparatus also includes an RF amplifier 6 that amplifies an RF signal that is a read signal from the optical pickup 2 during reproduction of the optical disk 1, and an optical disk after the RF signal output from the RF amplifier 6 is converted into digital data. A digital signal processing unit 8 that stores data generated by performing signal demodulation processing and error correction processing according to the data format 1 in the RAM 7, and data output from the digital signal processing unit 8 in response to an instruction from the system controller 22 A stream separation unit 9 that separates audio data, sub-picture data, and video data from the stream is provided.

  In addition, the optical disc reproducing apparatus receives audio data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data for performing the decoding process in the audio decoder 11. The RAM 10 to store, the sub-picture decoder 13 that inputs the sub-picture data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data to perform the decoding process in the sub-picture decoder 13 A RAM 12 for storing, a video decoder 15 for inputting video data output from the stream separation unit 9 and performing a predetermined decoding process, and a RAM 14 for temporarily storing data for performing the decoding process by the video decoder 15 And.

  In addition, this optical disk reproducing apparatus combines the data output from the video decoder 15 and the data output from the sub-picture decoder 13 in accordance with an instruction from the system controller 22, and the video processor 17 outputs the data. The video encoder 18 converts the synthesized data into a video signal for display and displays the image on the display device 20, and converts the data output from the audio decoder 11 into an analog audio signal and passes through an audio circuit (not shown). For example, a D / A converter 16 to be supplied to the speaker 19 is provided.

  The optical disk playback apparatus also has a playback key (not shown) for giving a playback instruction to the system controller 22, a stop key (not shown) for instructing playback stop, and other various operation keys (see FIG. (Not shown) and the system controller 22 for controlling the entire apparatus. The operation unit 21 includes light receiving means (not shown) that receives an optical signal indicating an operation command from a remote controller (remote controller) 26. The light receiving means converts the optical signal into an electrical signal and instructs the system controller 22 Input the signal. The remote controller 26 has various operation keys similar to those of the operation unit 21 and more various operation keys.

  In addition, the optical disk reproducing apparatus performs a calculation process according to the flash ROM 23 for storing programs and data for controlling each component of the apparatus and for controlling the entire apparatus, and the programs and data of the flash ROM 23. A CPU 24 that controls the system controller 22, a RAM 27 that temporarily stores data necessary for the arithmetic processing of the CPU 24, and display means on the main body side that displays operation contents from the operation unit 21 or the remote control 26. And a display unit 25.

  As a characteristic element of this embodiment, the system controller 22 starts the reproduction process of the optical disc 1 and reads UOP 6 in the user operation control information recorded on the optical disc 1, and the bit of this UOP 6 is logical. UOP6 bit determination means for determining whether the bit is 1 or logic 0, and UOP7 of the user operation control information recorded on the optical disc 1 when the bit of UOP6 is determined to be logic 0 Read, UOP7 bit determination means for determining whether the bit of UOP7 is logic 1 or logic 0, and the user recorded on the optical disc 1 when it is determined that the bit of UOP7 is logic 0 UO 8 in the operation control information is read, and UO 8 determines whether the bit of UOP 8 is logic 1 or logic 0 When it is determined that the 8-bit determination means and the bit of UOP8 are logic 0, UOP9 in the user operation control information recorded on the optical disc 1 is read, and whether the bit of UOP9 is logic 1 or not UOP9 bit determining means for determining whether or not the logic is 0, and when it is determined that the bit of UOP9 is logic 0, UOP11 of the user operation control information recorded on the optical disc 1 is read, and this UOP11 UOP11 bit determination means for determining whether the bit of the UOP11 is logic 1 or logic 0, and program setting that enables setting of the program playback function when it is determined that the bit of the UOP11 is logic 0 Program / random setting enable processing means for performing random setting enable processing enabling setting of processing or random playback function When it is determined that the UOP6 bit is logic 1, or when the UOP7 bit is determined to be logic 1, or when the UOP8 bit is determined to be logic 1 , Or when it is determined that the bit of the UOP 9 is logic 1, or when it is determined that the bit of the UOP 11 is logic 1, or when the program playback function cannot be set Alternatively, there is provided a program / random setting disable processing means for performing a random setting disable process for making it impossible to set the random playback function.

  FIG. 2 is a diagram showing a data structure recorded on a DVD video optical disk in the present embodiment. In FIG. 2, the video object set (VOBS) is composed of a plurality of video objects (VOB), that is, (VOB_IND1), (VOB_IND2),..., (VOB_INDi). IND1, IND2,..., INDi indicate identification numbers. Each video object (VOB) is composed of a plurality of cells (Cells). For example, the video object (VOB_IND1) is composed of a plurality of cells (C_IDN1), (C_IDN2),..., (C_IDNj). IDN1, IDN2,..., IDNj indicate identification numbers.

  For example, the cell (C_IDN1) is composed of a plurality of video object units (VOBU). Each video object unit (VOBU) includes a navigation pack (NV_PCK), an audio pack (A_PCK), a video pack (V_PCK), and a sub-picture pack (SP_PCK).

  The navigation pack (NV_PCK) and the audio pack (A_PCK) are composed of, for example, 2048 bytes. For example, the 14-byte pack header, the 24-byte system header, and the 6-byte packet header (Packet). header), 1-byte substream identifier (Sub_stream_id), 979-byte play control information data (PCI data), 6-byte packet header (Packet header), 1-byte substream identifier (Sub_stream_id), and 1017-byte data It consists of search information data (DSI data).

  A play control packet (PCI_PKT) is composed of a 6-byte packet header (Packet header), a 1-byte sub-stream identifier (Sub_stream_id), and 979-byte play control information data (PCI data). A 6-byte packet header (Packet header), a 1-byte substream identifier (Sub_stream_id), and 1017-byte data search information data (DSI data) constitute a data search information packet (DSI_PKT).

  FIG. 3 is a diagram for explaining the contents of the play control information data (PCI data) in FIG. In FIG. 3, 31 indicates the content of play control information data, and 32 indicates the content of general information of PCI. Reference numeral 33 denotes the contents of VOBU user operation control (VOBU_UOP_CTL).

  The play control information data (PCI data) includes general PCI information, non-seamless angle information, highlight information, and recording information. The general information of the PCI includes a navigation block logic block, a video object unit (VOBU) category, a video object unit (VOBU) user operation control, a video object unit (VOBU) playback start time, The information includes the playback end time of the video object unit (VOBU), the playback end time by the sequence end code in the video object unit (VOBU), the cell elapsed time, and the reservation information.

  As for the user operation control (VOBU_UOP_CTL) information of the video object unit (VOBU), each video title set (VTS) is searched by the title search pointer table (TT_SRPT), and the first video title set is searched. Based on the information (VTSI), the last video object unit (VOBU) of the video title set can be searched and obtained from the general information of the play control information (PCI) in the navigation pack (NV_PCK) .

  According to the user operation control (VOBU_UOP_CTL) information of the video object unit (VOBU), the user operation of the corresponding user function is controlled by the user operation bits b3 to b16 and b18 to b24. When each user operation bit (UOP bit) is logic 0, it means that the user operation of the corresponding user function is permitted, and when each user operation bit (UOP bit) is logic 1, it means prohibition.

  In particular, in the present embodiment, UOP6, UOP7, UOP8, UOP9, and UOP11 are used in the contents 33 of VOBU user operation control (VOBU_UOP_CTL). UOP6 has user functions PrevPG_Search () and TopPG_Search (), and is user operation control information for indexing the main information recorded on the DVD. UOP7 is user operation control information for skipping titles and chapters recorded on a DVD with a user function of NextPG_Search (). UOP8 is user operation control information for fast-forwarding reproduction of information recorded on a DVD whose user function is Forward_Scan (). UOP9 is user operation control information for quickly rewinding reproduction of information recorded on a DVD with a user function of Backward_Scan (). The UOP 11 is user operation control information for reading a menu of information recorded on the DVD, the user function of which is Menu_Call ().

  FIG. 4 is a flowchart for explaining the setting process of the program / random playback function in the present embodiment. The program / random playback function setting process will be described with reference to this flowchart and FIGS.

  First, when the optical disk (DVD) 1 is loaded, the system controller 22 detects the loading of the optical disk 1 (step S1), rotates the optical disk 1 a little and drives the optical pickup 2 to obtain disk information from the optical disk 1. A so-called mounting process, which is a reading process, is performed (step S2), and the process waits for the reproduction key of the remote control 26 or the reproduction key of the operation unit 21 to be pressed. When the playback key is pressed by the user, the system controller 22 detects the pressing of the playback key (step S3), and in response to this, the spindle motor 5 is rotated via the servo control unit 4 to thereby rotate the optical disc 1. And the optical pickup 2 is driven to start the reproduction process for the optical disc 1 (step S4).

  Then, the UOP6 bit determination means of the system controller 22 reads UOP6 in the user operation control information recorded on the optical disc 1, and determines whether the bit of this UOP6 is logic 1 or logic 0 (step) S5). When it is determined that the UOP6 bit is logic 0, the UOP7 bit determination means reads UOP7 in the user operation control information recorded on the optical disc 1, and whether the UOP7 bit is logic 1 or not. It is determined whether it is logical 0 (step S6).

  When it is determined that the UOP7 bit is logic 0, the UOP8 bit determination means reads UOP8 in the user operation control information recorded on the optical disc 1, and whether the UOP8 bit is logic 1 or not. It is determined whether it is logical 0 (step S7). When it is determined that the UOP11 bit is logic 0, the UOP9 bit determination means reads UOP9 in the user operation control information recorded on the optical disc 1, and whether the UOP9 bit is logic 1 or not. It is determined whether it is logical 0 (step S8).

  When it is determined that the bit of UOP9 is logic 0, the UOP11 bit determination means reads UOP11 in the user operation control information recorded on the optical disc 1, and whether the bit of UOP11 is logic 1 or not. It is determined whether it is logical 0 (step S9). When it is determined that the bit of UOP9 is logic 0, the program / random setting enable processing means sets the program playback function to enable setting of the program playback function or the random setting to enable setting of the random playback function. Allowable processing is performed (step S11).

  As described above, the program reproduction or random reproduction can be performed by executing the program setting enabling process for enabling the setting of the program reproduction function or the random setting enabling process for enabling the setting of the random reproduction function. Since it is determined whether or not the program / random playback function can be set using UOPs 6, 7, 8, 9, and 11, it is not necessary to use the entire UOP for the determination, and all the UOP information is stored in the memory. Therefore, the memory capacity can be reduced.

  When it is determined that the UOP6 bit is logic 1, or when the UOP7 bit is determined to be logic 1, or when the UOP8 bit is determined to be logic 1, Alternatively, when it is determined that the UOP9 bit is logic 1, or when it is determined that the UOP11 bit is logic 1, the program / random setting impossibility processing means of the system controller 22 has a program playback function. A program setting impossibility process for disabling the setting or a random setting disabling process for disabling the setting of the random playback function is performed (step S10). When the UOP bit is prohibited as described above, the user operation content of the UOP is not displayed on the display device 20 through the setting OSD (on-screen display).

  In this way, during playback of a location where the UOP bit is logic 1 (warning screen or commercial screen), it is impossible to set the program playback disable function or the random playback function that disables the program playback function setting. By executing the random setting disabling process, the warning screen and commercial screen that must be reproduced on the optical disc (DVD) standard can be reproduced, and the disc standard violation can be avoided. Note that after the warning screen or commercial screen is reproduced, the program / random reproduction function can be set.

  As described above, according to the present embodiment, by introducing an algorithm for determining whether or not the program / random playback function can be set, the setting of the program / random playback function is prohibited at a place where playback must be performed. , Disk standard violations can be avoided. In other words, when playing information on a commercial DVD that contains movies or music promotions, it is possible to set the program / random playback function without skipping the warning screen or commercial screen that is played first. As a result, the disc standard violation can be avoided.

  The present invention relates to a program / random playback function disabling process for playing a DVD that requires a DVD player to play a warning screen or commercial screen on which an explanatory text explaining the content of the copyright is displayed in the disc standard. Is available.

It is a block diagram which shows the structure of the optical disk reproducing | regenerating apparatus concerning one Embodiment of this invention. It is a figure which shows the data structure currently recorded on the optical disk of DVD video in the said embodiment. It is a figure for demonstrating the content of the play control information data (PCI data) in FIG. 6 is a flowchart for explaining a program / random playback function setting process in the embodiment.

Explanation of symbols

1 optical disk 22 system controller (UOP 6 bit determination means, UOP 7 bit determination means, UOP 8 bit determination means, UOP 9 bit determination means, UOP 11 bit determination means, program / random setting enable processing means, program / random setting disable processing means)

Claims (5)

In an optical disc playback apparatus for playing back information recorded on an optical disc,
UOP6 bit determination means for starting reproduction processing of the optical disk, reading UOP6 in the user operation control information recorded on the optical disk, and determining whether the bit of this UOP6 is logic 1 or logic 0;
When it is determined that the bit of UOP6 is logic 0, UOP7 in the user operation control information recorded on the optical disc is read, and it is determined whether the bit of UOP7 is logic 1 or logic 0 UOP7 bit determination means to perform,
When it is determined that the bit of UOP7 is logic 0, UOP8 in the user operation control information recorded on the optical disc is read, and it is determined whether the bit of UOP8 is logic 1 or logic 0 UOP 8-bit determination means to perform,
When it is determined that the bit of UOP8 is logic 0, UOP9 in the user operation control information recorded on the optical disc is read, and it is determined whether the bit of UOP9 is logic 1 or logic 0 UOP 9-bit determination means for
When it is determined that the bit of UOP9 is logic 0, UOP11 in the user operation control information recorded on the optical disc is read, and it is determined whether the bit of UOP11 is logic 1 or logic 0 UOP11 bit determination means for performing,
Program / random setting capable of performing program setting enabling processing for enabling setting of program playback function or random setting enabling processing for enabling setting of random playback function when it is determined that the bit of UOP11 is logic 0 Processing means;
When it is determined that the UOP6 bit is logic 1, or when the UOP7 bit is determined to be logic 1, or when the UOP8 bit is determined to be logic 1, Alternatively, when it is determined that the bit of UOP9 is logic 1, or when it is determined that the bit of UOP11 is logic 1, or a program setting disabling process for disabling setting of the program playback function or An optical disc reproducing apparatus comprising: a system controller having a program / random setting impossibility processing means for performing random setting impossibility processing for disabling setting of a random reproduction function. In an optical disc playback apparatus for playing back information recorded on an optical disc,
From the user operation control information recorded on the optical disc, the designated user operation control information necessary for reproduction according to the disc standard is read out, and the bit of the designated user operation control information is logical. Designated user operation control information bit determining means for determining whether the value is 1 or logic 0;
Program for enabling program setting enabling setting of program playback function or random setting enabling processing enabling setting of random playback function when bit of specified user operation control information is determined to be logic 0 / Random setting possible processing means,
When it is determined that the bit of the designated user operation control information is logic 1, program setting disable processing for disabling setting of the program playback function or random setting disable processing for disabling setting of the random playback function An optical disk reproducing apparatus comprising a system controller having a program / random setting disable processing means to be performed.   3. The optical disk reproducing apparatus according to claim 2, wherein the designated user operation control information necessary for reproduction according to the disk standard is UOP6, UOP7, UOP8, UOP9, UOP11.   The system controller starts the reproduction process of the optical disc, reads UOP 6 in the user operation control information recorded on the optical disc, and determines whether the bit of UOP 6 is logic 1 or logic 0. When it is determined that the bit determination means and the bit of UOP6 are logic 0, UOP7 of the user operation control information recorded on the optical disk is read, and whether the bit of UOP7 is logic 1 or logic 0 UOP7 bit determining means for determining whether or not the bit of UOP7 is logical 0, UOP8 of the user operation control information recorded on the optical disc is read, and the bit of UOP8 is UOP8 bit determination means for determining whether it is logical 1 or logical 0, and the bit of UOP8 UOP9 bit determining means for reading UOP9 in the user operation control information recorded on the optical disc and determining whether the bit of this UOP9 is logic 1 or logic 0 when it is determined that it is 0 When it is determined that the bit of UOP9 is logic 0, UOP11 in the user operation control information recorded on the optical disc is read, and whether the bit of UOP11 is logic 1 or logic 0 3. The optical disk reproducing apparatus according to claim 2, further comprising UOP11 bit determining means for determining.   When it is determined that the bit of the UOP11 is logic 0, the system controller performs a program setting enabling process for enabling setting of a program playback function or a random setting enabling process for enabling setting of a random playback function. When it is determined that the program / random setting enable processing means and the bit of the UOP6 are logic 1, or when the bit of the UOP7 is determined to be logic 1, or the bit of the UOP8 is logic 1 If it is determined that the bit of UOP9 is logic 1, or if the bit of UOP11 is determined to be logic 1, or the program playback function is set Program setting disable processing to disable or random setting disable processing to disable the setting of random playback function The optical disk reproducing apparatus according to claim 4, characterized in that it comprises a program / random setting Call processing means for performing.

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