JP2009232123A - Content reproducing device and content reproduction control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a so-called resume reproducing function in a device for controlling the reproduction of contents read from a recording medium using a program read from the recording medium. <P>SOLUTION: A content reproduction system 1 includes: a read part 22 for reading contents and a BD-J program for controlling BD-J contents from a Blu-ray Disc (BD) 41; a content control part 23 for controlling the reproduction of the BD-J contents read from the BD 41 by unfolding the BD-J program read from the BD 41 by the read part 22 in a RAM 12 and executing it; a stop instruction receiving part 25 for receiving the stop instruction of the reproduction of the contents; and a state holding part 26 for holding the contents of the execution region of the BD-J program in the RAM 12 as it is in the state in the middle of execution when the stop instruction is received by the stop instruction receiving part 25 while reproducing the BD-J contents. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a content reproduction apparatus that reproduces content read from a recording medium.

  2. Description of the Related Art Conventionally, there is a technique for receiving a detection of an audio / video signal input switching operation, transmitting a pause signal, storing a reproduction position at the time when the pause signal is received, and stopping the reading means (see Patent Document 1). reference).

Further, there is a technique for stopping a spindle motor for rotating a disk when a non-operating state continues for a certain time (see Patent Document 2), and when data is not recorded or reproduced for a certain time, There is a technique for stopping rotation (see Patent Document 3).
JP 2001-176249 A JP-A 64-13253 JP 2004-326944 A

  2. Description of the Related Art Conventionally, an apparatus having a function of reproducing video and audio content based on signals selected from a plurality of sources such as a recording medium such as a CD (Compact Disc) and a DVD (Digital Versatile Disc), FM / AM, and TV. When the input source is changed during playback of a CD, DVD, etc., the playback position of the CD or DVD (the stop position before switching the source) is stored, and playback is resumed from the position where the previous playback was stopped at the next playback. It is common to have a so-called resume playback function that resumes. The resume playback function has become a general function for users through the widespread use of playback devices such as CDs and DVDs, and the user expects this function to work automatically in general playback devices.

  Here, even if the content is the same type of content (for example, video content), such as Blu-ray Disc (registered trademark, hereinafter referred to as “BD”), a medium on which content with a different control method in reproduction is provided. is there. More specifically, in BD, as a content control method, HDMV (High Definition Movie), which is an extension of the method used in conventional DVDs, or BD-J (Blu-ray) using a Java (registered trademark) program is used. (Disc Java) control method is used. For HDMV content, since the control method is an extension of the conventional DVD, it is possible to easily perform a resume playback function similar to that provided by a DVD by storing the identifier of the content being played back. It is possible to provide.

  However, regarding the BD-J content, the control method is different from that of the conventional DVD, and the control method is executed by executing the Java program read from the BD. Therefore, the same method as that provided by the conventional DVD is used. It is not easy to provide a resume playback function. More specifically, since BD-J is a control method for executing a Java program, once the program is terminated, it is necessary to execute the program from the beginning at the next playback. For this reason, in playback of BD-J content, a front end (F / E) for reading information from a recording medium and decoding are performed as in the resume playback function provided in a conventional DVD playback device. The resume playback function cannot be provided by stopping both the back end (B / E).

  In view of the above problems, an object of the present invention is to provide a so-called resume playback function in an apparatus that controls playback of content read from a recording medium using a program read from the recording medium. .

  In order to solve the above-described problems, the present invention controls the reproduction of content read from a recording medium using a program read from the recording medium by holding an execution area of the content control program. In the apparatus, it is possible to provide a so-called resume reproduction function.

  Specifically, the present invention is a content reproduction device that has a storage device and reproduces content read from the recording medium using the storage device, and controls the content and the content from the recording medium. Content read from the recording medium by expanding the content control program read from the recording medium by the reading means to the storage device and executing the content control program The content control means for controlling the reproduction of the content, the stop instruction acceptance means for accepting an instruction to stop the reproduction of the content, and the storage device when the stop instruction is accepted by the stop instruction acceptance means during the reproduction of the content. Holds the contents of the above execution area of the content control program in the middle of execution A status holding unit that is the content reproducing device comprising a.

  Here, the content control program is a program for controlling the playback order and the like in the playback of content, and the content control means controls the playback of content by executing this content control program. The content control program is, for example, a BD-J program for controlling BD-J content recorded on a BD, and is managed as a process (task) by a CPU (Central Processing Unit) or a program execution environment and defined in the program It is controlled using a variable, stack, etc.

  According to the present invention, the contents of the execution area of the content control program on the storage device are held in the middle of execution, thereby enabling resume reproduction of the type of content controlled by executing the content control program. Here, the contents of the execution area may be retained by maintaining the execution area of the program reserved on the main storage device as it is, or the contents of the execution area may be copied to the auxiliary storage device. And may be retained by storing them. By storing in the auxiliary storage device, the program execution area can be released from the main storage device, resources can be used efficiently, and the content playback device is turned off. However, it is possible to reliably perform resume reproduction.

  In addition, the reading unit reads the content and the content control program from the recording medium by driving a driving unit that is mechanically driven, and the content reproduction apparatus receives a stop instruction received by the stop instruction receiving unit. In the case of a stop instruction excluding a temporary stop instruction, a drive end means for ending the drive of the drive unit when the state is held by the state holding means may be further provided.

Normally, when the accepted stop instruction is a pause instruction (so-called pause instruction), there is a high possibility that playback of the stopped content will be resumed in a short time. For this reason, in order to shorten the time required for resuming the reproduction, the driving unit is continuously driven for a certain time after the reproduction is stopped. However, when the received stop instruction is a stop instruction excluding a pause instruction (for example, a function mode switching instruction or the like), it is unlikely that playback of the stopped content will be resumed in a short time. . For this reason, when the stop instruction is a stop instruction excluding the temporary stop instruction, the content reproduction apparatus according to the present invention ends the driving of the drive unit with the holding of the state by the state holding unit. As a result, the deterioration of the drive unit can be prevented and the life of the drive unit can be extended.

  The stop instruction excluding the pause instruction may be a stop instruction accompanied by source switching, for example. Here, it is assumed that the content reproduction device is a content reproduction device that reproduces content from a selected source among a plurality of sources including a recording medium.

  Further, when the stop instruction is a pause instruction, the drive end means may end the drive of the drive unit when the reproduction is not resumed within a predetermined time. As a result, it is possible to prevent the drive unit from being deteriorated, for example, when a pause instruction is issued but a reproduction restart instruction (pause cancellation) is not issued for a long time. It should be noted that the predetermined time is appropriately optimized in consideration of the balance between the durability of the parts used in the driving unit and the convenience that can be provided by providing quick return according to the embodiment. It is preferably set.

  The present invention can also be grasped as an invention of a control method of a content reproduction apparatus, a control program, and a computer-readable recording medium on which the control program is recorded.

  According to the present invention, it is possible to provide a so-called resume reproduction function in an apparatus for controlling reproduction of content read from a recording medium using a program read from the recording medium.

  Embodiments of a content playback system including a content playback apparatus according to the present invention will be described below with reference to the drawings. The content reproduction system according to the present embodiment may be used for various applications such as an in-vehicle device and a portable device, in addition to a content reproduction system installed and used indoors and outdoors.

  FIG. 1 is a diagram showing an outline of the hardware configuration of the content reproduction system according to this embodiment. A content playback system 1 according to the present embodiment includes a CPU (Central Processing) that controls the entire system by processing instructions and data expanded in a RAM (Random Access Memory) 12, a ROM (Read Only Memory) 14, a RAM 12, and the like. (Unit) 11, HDD (Hard Disk Drive) 13 for storing various data used by the system such as various programs loaded on the RAM 12, decoder (Digital Signal Processor) 15, and digital signals passed from the decoder 15 as analog signals D / A converter 16, converter 17, touch panel display 2, speaker 3, multi-drive 4, TV tuner 5, AM / FM tuner 6, etc. A, which are electrically connected via a bus or the like.

The multi-drive 4 is an optical disk drive capable of loading and reading a plurality of standard discs (recording media) such as CD, DVD, and BD. In the system according to the present embodiment, information read from a disk such as the BD 41 loaded in the multi-drive 4 is sent to the decoder 15. The decoder 15 generates a video signal and an audio signal based on the read information. Then, by outputting the video signal and the audio signal generated by the decoder 15 to the touch panel display 2 and the speaker 3, the content reproduction system 1 can
Play video and audio.

  In the present embodiment, the video signal and the audio signal based on the information read from the disc are generated by the decoder 15 such as a so-called DSP (Digital Signal Processor), but the decoding process is developed in the RAM 12 or the like. It may be performed by the CPU 11 that executes the decoded program. Further, the processing of the video signal and the processing of the audio signal based on the information read from the disc may be processed by one processor or may be processed by different dedicated processors.

  The touch panel display 2 is an input / output device (user interface) for the user in the present system, and is controlled by the CPU 11 to display an image for notifying the user of some information, and the user touches the image display portion. A user operation is accepted by detecting the operation. In addition to the touch operation on the touch panel display 2, the content reproduction system 1 accepts an operation by the user by various buttons provided in the system 1 (not shown). Content input via the touch panel display 2 or buttons is recorded in the RAM 12 and processed by the CPU 11. Further, notifications and the like to the user by this system may be acoustically output via the speaker 3.

  FIG. 2 is a diagram showing an outline of a functional configuration of the content reproduction system 1 according to the present embodiment. In the system according to the present embodiment, the CPU 11 interprets and executes the content playback program expanded in the RAM 12 or the ROM 14, thereby reproducing the content using the control method corresponding to the content, and the content from the BD 41. A reading unit 22 that reads a BD-J program for controlling the BD-J content; a content control unit 23 that controls reproduction of the content by developing the read BD-J program in the RAM 12 and executing the program; An input receiving unit 24 that receives an input of a user operation, a stop instruction receiving unit 25 that receives an instruction to stop playback of content read from the BD 41, and the contents of the execution area of the BD-J program when the stop instruction is received A state holding unit 26 for holding the state, and a state holding unit 26 , And the drive-end portion 27 to terminate the drive of the drive unit with the function as the content reproduction system 1 comprising a.

  The reproduction unit 21 and the content control unit 23 reproduce the content by using a control method corresponding to the content read from the disc such as the BD 41. That is, when the content read from the BD 41 is an HDMV content, the playback of the content is controlled according to the command of the HDMV, and when the content read from the BD 41 is a BD-J content, the content is read from the same BD 41. The playback of content is controlled by executing the BD-J program. Note that when playing back content, the playback unit 21 can play back HDMV content and BD-J content continuously.

  The reading unit 22 reads the HDMV content, the BD-J content, the BD-J program for controlling the BD-J content, and the like from the BD 41 by the multi drive 4. Here, the multi-drive 4 according to the present embodiment has a spindle driving unit for rotating the loaded disc and a pickup driving unit for adjusting the position of the pickup, and by driving these driving units. Then, the content, the BD-J program, and the like are read from the loaded disc such as the BD41.

The state holding unit 26 holds the contents of the execution area of the BD-J program on the RAM 12 in a state in the middle of execution when a stop instruction is received by the stop instruction receiving unit 25 during content reproduction. At this time, the state holding unit 26 may keep the contents of the execution area as it is during execution by maintaining the contents of the execution area on the RAM 12 as they are, or the contents of the execution area of the BD-J program. May be copied and stored in an auxiliary storage device such as the HDD 13 to retain the contents of the execution area as they are being executed. If the copy destination auxiliary storage device is a non-volatile storage device, even when the power of the content reproduction system 1 is turned off, the reproduction can be resumed from the point where the reproduction was stopped at the next reproduction.

  When the stop instruction received by the stop instruction receiving unit 25 is a stop instruction by switching the function mode, the drive end unit 27 ends the drive of the drive unit as the state holding unit 26 holds the state. The content reproduction system 1 is a system capable of reproducing content from a selected source among a plurality of sources including BD41, TV broadcast waves, and AM / FM broadcast waves. An operation for switching the input source from the multi-drive 4 loaded with the BD 41 to another input source such as the TV tuner 5 or the AM / FM tuner 6.

  In the present embodiment, driving of the drive unit is terminated when the function mode is switched. However, an operation that is not a function mode switching is also performed when the operation is accompanied by a stop instruction other than a pause instruction. The driving of the unit may be terminated. This is because in the case of a stop instruction based on such an operation, it is unlikely that the reproduction will be resumed in a short time, and therefore it is preferable to end the drive of the drive unit in order to prevent the drive unit from deteriorating. Because.

  Further, when the stop instruction is a pause instruction (a stop instruction based on a pause operation (pause operation)), the drive end unit 27 ends the drive of the drive unit when reproduction is not resumed within a predetermined time. . In general, the driving state of the drive unit is maintained for quick resumption of reproduction at the time of resumption of reproduction, and this function is also adopted in the content reproduction system 1 according to the present embodiment, but within a short time. When the reproduction is not resumed, the drive of the drive unit is terminated after a predetermined time has elapsed in order to prevent the drive unit from deteriorating. Thereby, for example, even when the user performs the pause operation but does not perform the operation for resuming the reproduction for a long time, the deterioration of the drive unit can be prevented.

FIG. 3 is a diagram illustrating a data configuration of the Blu-ray Disc according to the present embodiment. Blu-ray Disc has an index that lists the contents recorded on the disc.
table, MovieObject for controlling the playback content of HDMV content, BD-J Object for controlling the playback content of BD-J content, PlayList and PlayItem arranged in the playback order in PlayList operated from these objects ClipInfo storing information of the stream file to be referred to, and AV Stream, which is a stream file including actual video and audio data, are recorded.

  Here, the Index table has a list of contents in a format such as First Playback, Top Menu, Title1, Title2, and the like, and information indicating whether each content is HDMV content or BD-J content (hereinafter, BD-J content). This information is referred to as a “content control method identification flag”). The playback unit 21 refers to the content control method identification flag to determine whether the content related to playback is HDMV content or BD-J content.

  When the content related to playback is HDMV content, MovieObject is selected, and PlayList, TopMenu, Title, and the like are controlled using Navigation Command as in the conventional DVD video. When the content related to reproduction is BD-J content, BD-J Object is selected, and the Java program is executed to control PlayList, TopMenu, Title, and the like. Note that these objects control the playback content by specifying an ID assigned to PlayList or the like.

  Here, the content playback system 1 according to the present embodiment provides a so-called resume playback function for storing a playback position when playback is stopped and starting playback from the playback position stored at the next playback when playing back a DVD or the like. . The resume playback function is also provided for BD HDMV content in the same manner as a conventional DVD. This is because the HDMV content content control system is an extension of the conventional DVD video content control system, and the resume playback function can be provided in the same manner.

  However, for BD-J content recorded on a BD, the content control method is not an extension of the conventional method, but is a method for controlling the content by reading and executing a Java program. It is not easy to provide a resume playback function in a way. For this reason, the content reproduction system 1 according to the present embodiment provides a resume reproduction function by a method of maintaining the execution region of the content control program in a state in the middle of execution. Hereinafter, details of the processing will be described using a flowchart.

  FIG. 4 is a flowchart showing a flow of BD-J content reproduction stop processing according to the present embodiment. In the processing shown in this flowchart, when the playback unit 21 is playing back BD-J content according to the content control unit 23 that executes the BD-J program, a pause operation or a function mode switching operation by the user is performed. It will be triggered by that.

  The content being played back when the processing shown in this flowchart is performed is BD-J content. In other words, the content control program is managed as a process (task) by the OS (Operating System) or execution environment of the system, and an execution area is allocated, and processing is advanced using a stack, a variable, and the like. For this reason, if the back-end processing is stopped in the same manner as the conventional DVD, the execution area on the RAM 12 for executing the content control program is released, and the program must be executed from the beginning at the next execution. , Playback cannot be resumed from the previous stop.

  In step S101 and step S102, a user operation and a stop instruction accompanying this user operation are accepted. The input receiving unit 24 receives an operation performed by the user using the touch panel display 2 or other buttons provided in the system (step S101). Then, the stop instruction accepting unit 25 accepts a stop instruction issued with the operation accepted by the input accepting unit 24 (step S102). Thereafter, the process proceeds to step S103.

  In step S103, processing in the back end is stopped. Here, the back end refers to a portion of the content reproduction system that decodes the read content, and in this embodiment, the reproduction unit 21 and the content control unit 23 correspond to the back end. The state holding unit 26 holds the execution area on the RAM 12 for content control in a state in the middle of execution. That is, the contents of the content control program being executed are held as they are, including the state of variables, stacks, and the like. As a result, execution can be resumed from the middle of the program. Thereafter, the process proceeds to step S104.

In step S104, the type of stop instruction is determined. The drive end unit 27 determines whether the stop instruction received in step S102 is a stop instruction issued in response to a temporary stop operation by a user or a stop instruction issued in response to a function mode switching operation. judge. The content (type) of the operation related to the stop instruction is determined based on the stop instruction notification method. More specifically, a method may be employed in which the input receiving unit 24 that has received a user operation refers to an operation type code issued according to the content of the user operation. In this case, the drive end unit 27 compares the operation type code stored in advance for determination with the operation type code issued by the input receiving unit 24 in response to a user operation, thereby determining the type of stop instruction. judge. However, other methods may be adopted as a method for determining the type of stop instruction. If it is determined that the stop instruction is a stop instruction issued in response to a pause operation, the process proceeds to step S105. If it is determined that the stop instruction is a stop instruction issued in response to the function mode switching operation, the process proceeds to step S106.

  In step S105, the passage of a predetermined time is monitored. The drive end unit 27 monitors whether a predetermined time has elapsed after a stop instruction is issued or a user operation is performed. As a specific method of waiting for the elapse of a predetermined time, a method of repeatedly acquiring the current time from the system and repeating the acquisition of the current time until a predetermined time elapses from the time of the acquisition start time, or other timer process Embodiment of the method for notifying the process related to the drive end unit 27 that the predetermined time has passed by using a flag, an interrupt or the like when the predetermined time has passed. It is preferable that a method suitable for the above is appropriately employed.

  FIG. 5A is a diagram showing, in chronological order, details of back-end and front-end operations in accordance with user operations in conventional DVD and HDMV content. FIG. 5B is a diagram showing, in chronological order, details of back-end and front-end operations according to user operation details in the BD-J content of the present embodiment. When the operation performed by the user is a pause operation, there is a high possibility that the reproduction is resumed in a short time. For this reason, by not immediately ending the driving of the drive unit (front end), it is possible to quickly resume the reproduction at the time of resuming the reproduction, and by ending the driving after a predetermined time, the user forgets to resume the reproduction, etc. Prevent deterioration of the drive unit. Thereafter, the process proceeds to step S106.

  In step S106, processing in the front end is stopped. Here, the front end refers to a portion that performs a process of reading information from a disc such as the BD 41 in the content reproduction system, and in the present embodiment, the reading unit 22 corresponds to the front end. The driving end unit 27 ends driving of a spindle driving unit, a pickup driving unit, and the like provided in the multi-drive 4. Here, it is preferable that all driving of the driving unit that is driven to read out information from the BD 41 is terminated, but deterioration is likely to progress by continuing driving (the length of the driving time becomes the component life). It is possible to terminate only the drive unit (which greatly affects). Thereafter, the processing shown in this flowchart ends.

  FIG. 6A is a diagram showing the contents of back-end and front-end operations according to the contents of user operations in conventional DVD and HDMV contents. FIG. 6B is a diagram showing the details of backend and frontend operations according to the contents of user operations in the BD-J content of the present embodiment. According to FIG. 6A, in the conventional method, when switching of the function mode is instructed, it is understood that the back end ends the reproduction and releases the memory used for the reproduction process. On the other hand, according to the content reproduction system according to the present embodiment, when the function mode switching operation is performed by the user, unlike the conventional case, the backend state is maintained so that the BD-J content is reproduced. It is also possible to provide a resume playback function. In addition, the content reproduction system according to the present embodiment is characterized in that the front end drive is terminated while maintaining the back end state during the function mode switching operation. In other words, the content playback system according to the present embodiment can provide a resume playback function by maintaining the state of the back end, and can further prevent the deterioration of components by terminating the driving of the front end. .

It is a figure which shows the outline of the hardware constitutions of the content reproduction system which concerns on embodiment. It is a figure which shows the outline of a function structure of the content reproduction system which concerns on embodiment. It is a figure which shows the data structure of Blu-ray Disc which concerns on embodiment. It is a flowchart which shows the flow of the BD-J content reproduction | regeneration stop process which concerns on embodiment. It is the figure which showed the content of the operation | movement of the back end according to the content of user operation in the conventional DVD and HDMV content, and the time series. It is the figure which showed the content of the operation | movement of the back end according to the content of user operation in the BD-J content of embodiment, and the front end in time series. It is a figure which shows the content of operation | movement of the back end according to the content of user operation in the conventional DVD and HDMV content. It is a figure which shows the content of the operation | movement of the back end according to the content of user operation in the BD-J content of embodiment, and a front end.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Content reproduction system 2 Touch panel display 3 Speaker 4 Multi drive 11 CPU (Central Processing Unit)
12 RAM (Random Access Memory)
13 HDD (Hard Disk Drive)
DESCRIPTION OF SYMBOLS 15 Decoder 21 Reproduction | regeneration part 22 Reading part 23 Content control part 24 Input reception part 25 Stop instruction | indication reception part 26 State holding part 27 Drive end part 41 Blu-ray Disc

Claims (8)

A content playback device that has a storage device and plays back the content read from the recording medium using the storage device,
Reading means for reading out content and a content control program for controlling the content from the recording medium;
Content control means for controlling reproduction of content read from the recording medium by developing the content control program read from the recording medium by the reading means on the storage device and executing the program;
Stop instruction accepting means for accepting an instruction to stop playback of the content;
State holding means for holding the contents of the execution area of the content control program on the storage device in the middle of execution when the stop instruction is received by the stop instruction receiving means during reproduction of the content;
A content playback apparatus comprising: The reading means reads the content and the content control program from the recording medium by driving a mechanically driven drive unit,
In the case where the stop instruction received by the stop instruction receiving means is a stop instruction excluding a temporary stop instruction, a drive end means is further provided for ending the drive of the drive unit as the state is held by the state holding means. ,
The content reproduction apparatus according to claim 1. The content reproduction device is a content reproduction device that reproduces content from a selected source among a plurality of sources including the recording medium,
The stop instruction excluding the pause instruction is a stop instruction with switching of the source.
The content reproduction apparatus according to claim 2. The driving end means ends the driving of the driving unit when the reproduction is not resumed within a predetermined time when the stop instruction is a pause instruction;
The content reproduction apparatus according to claim 2 or 3. The content reproduction device further includes an auxiliary storage device,
The state holding means holds the content control program in the middle of execution by causing the auxiliary storage device to store the contents of the execution area of the content control program on the storage device in the middle of execution. ,
The content reproduction apparatus according to any one of claims 1 to 4. A content playback device that has a storage device and plays back the content read from the recording medium using the storage device.
A reading step of reading content and a content control program for controlling the content from the recording medium;
A content control step for controlling reproduction of the content read from the recording medium by developing the content control program read from the recording medium in the reading step in the storage device and executing the program;
A stop instruction receiving step for receiving an instruction to stop playing the content;
A state holding step of holding the content of the execution area of the content control program on the storage device in the middle of execution when the stop instruction is received in the stop instruction receiving step during the reproduction of the content;
A content reproduction control method for executing. In the reading step, the content and the content control program are read from the recording medium by driving a mechanically driven drive unit,
The content playback device
If the stop instruction received in the stop instruction reception step is a stop instruction excluding a temporary stop instruction, a drive end step is further executed to end the drive of the drive unit with the state holding in the state holding step. To
The content reproduction control method according to claim 6. In the driving end step, when the stop instruction is a pause instruction, the driving of the driving unit is ended when the reproduction is not resumed within a predetermined time.
The content reproduction control method according to claim 7.

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