JP2009048715A - Reproducing system and optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reproducing system and an optical disk device which can prevent the reproduction of a content from being interrupted even if communication line speed of a network is lowered temporarily. <P>SOLUTION: When a streaming reproduction processing is executed, a control part 21 stores successively HD streaming data 50 distributed from a DB server 4 in a buffer RAM 30. When the HD streaming data 50 is stored by fixed quantity, the control part 21 indicates to a reproduction circuit 31 so that the streaming data 50 of the buffer RAM 30 is read out successively and reproduced. When streaming reproduction is interrupted, the control part 21 interrupts streaming reproduction, and reproduces SD data of the DVD 100 from the interruption point. Therefore, the reproduction of the content is not interrupted even if the communication line speed of the network 5 is lowered temporarily. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a playback system including an optical disc device in which an optical disc on which content is recorded is set, and a server that communicates with the optical disc device via a network, and an optical disc device applied in this system. Is.

Conventionally, a DVD (Digital Versatile Disk) is generally widely used as a medium capable of reproducing SD (Standard Definition) images.
Furthermore, in recent years, Blu-ray Discs (HD-DVDs) and HDDVDs (High Definition DVDs) have begun to become popular as next-generation media capable of reproducing HD (High Definition) images having higher resolution than SD images. With a Blu-ray disc or HDDVD that can be increased in capacity, the user can enjoy HD images that are high-definition images.

When the user wants to watch the same content as the already owned DVD as an HD image, the user has to purchase a new Blu-ray disc or HDDVD even though the same content as the DVD is recorded.
In Patent Document 1, a reproduction system is proposed.
JP 2006-352778 A

  Therefore, a method of playing back high-definition content by using low-definition media seems to be considered. In this method, for example, a server that stores streaming data including HD images for each title is provided, streaming data having the same title as the set DVD is distributed from the server to the optical disc apparatus via the Internet, and the streaming data is transmitted to the optical disc. This is a method for playing back an HD image by processing the apparatus. Since high-definition content is reproduced by this method, it is likely that it is not necessary to newly purchase next-generation media on which the same content is recorded.

However, the communication line speed of networks including the Internet often decreases temporarily due to various environmental factors. In addition, since streaming data includes at least HD images, the amount of data is large. For this reason, the streaming data acquisition speed may not catch up with the playback speed.
In this case, although the high-definition content is reproduced using the low-definition media, the HD image reproduction is interrupted. Therefore, the user is kept waiting while the reproduction is interrupted (for example, for 20 seconds).

  The above problems can occur again when the next-generation media such as Blu-ray Disc and HDDVD appear in the future.

  The present invention is intended to solve such a conventional problem, and provides a playback system and an optical disc apparatus that prevent content playback from being interrupted even if the network communication line speed temporarily decreases. The purpose is to do.

  The reproduction system of the present invention has the following configuration in order to solve the above problems.

(1) an optical disc apparatus having reproduction means for reading and reproducing the first content data from a first optical disc in which the first content data and the title name of the first content data are recorded in advance;
A server connected to the optical disc device via a network and storing second content data of higher definition than the first content data for each title name;
In a playback system with
The optical disc apparatus includes a communication unit that acquires a title name of the first content data from the first optical disc and transmits the title name to the server via the network.
The server distributes the second content data having the same title name as the title name of the first content data transmitted from the communication means to the optical disc apparatus by streaming via the network;
The optical disc device has a buffer memory for sequentially storing the second content data distributed from the server,
The reproducing means includes
Performing streaming playback for sequentially reading and playing back the second content data from the buffer memory;
When the streaming reproduction is interrupted, the streaming reproduction is interrupted, and the first content data is reproduced from the interrupted position.

In this configuration, both content data are data indicating content such as movies. The storage location of both content data is specified by the playback time. The first content data is data indicating SD content including SD images and sound. The second content data is data indicating HD content including at least an HD image. The title names of both content data are title names of movies and the like.
In this configuration, for example, when the user sets the first optical disc, the communication means transmits the title name of the first content data recorded on the first optical disc to the server. When the title name is received, the server distributes the second content data having the same title as the title name to the optical disc apparatus. Thereby, the reproduction means reproduces the second content data having the same title as the first content data. In this way, the playback system plays back high-definition content using the first optical disk already owned by the user.

  When the streaming playback is interrupted, the playback means interrupts the streaming playback, and plays back the first content data on the first optical disc from the interrupted location. Thereby, the sound and SD image based on the first content data are reproduced. Therefore, even if the communication line speed of the network is temporarily reduced, it is possible to prevent content reproduction from being interrupted. Therefore, there is no need to make the user wait.

(2) The reproduction means includes
Searching the storage position on the first optical disc of the first content data having the same playback time as the playback time of the second content data being streamed immediately before the streaming playback is interrupted,
When the streaming reproduction is interrupted, the first content data is reproduced by reading the first optical disk from the storage location being searched.

  In this configuration, in preparation for when streaming playback is interrupted, the playback means searches for the storage location on the first optical disc of the first content data having the same playback time. For this reason, when streaming playback is interrupted, the playback means knows the storage position. Thereby, when streaming reproduction is interrupted, it is possible to smoothly shift to reproduction of SD data having the same reproduction time.

(3) When the streaming reproduction is interrupted, the communication means requests the server to distribute the second content data after a predetermined reproduction time ahead,
The buffer memory sequentially stores the second content data distributed from the server after the predetermined playback time,
The reproduction means re-executes the streaming reproduction by the second content data when the reproduction time of the first content data reaches the predetermined reproduction time ahead after the streaming reproduction is interrupted.

  In this configuration, the predetermined playback time ahead is, for example, 30 seconds ahead. When streaming playback is interrupted, the communication means requests the server for streaming delivery. This request is input to the server via the network. Then, the server analyzes the second content data, and if there is second content data after a predetermined reproduction time, performs the streaming delivery. When the predetermined playback time is reached, streaming playback using the second content data is resumed. As a result, the HD image is reproduced again without interruption of the content reproduction. Thereby, the user can view the HD image again.

(4) The first content data is data indicating image and audio content,
The second content data is data indicating only image content,
The reproduction means reproduces the second content data for an image and the first content data for an audio while synchronizing the two during the streaming reproduction.

  In this configuration, the amount of second content data is small because no audio is distributed. Therefore, the case where streaming reproduction is interrupted can be reduced.

(5) The optical disc apparatus includes a designation unit that accepts designation of the predetermined reproduction time.

  In this configuration, the user designates a predetermined playback time destination in advance with a designation key. Thereby, the user can designate a predetermined playback time ahead according to his / her usage method.

(6) the first optical disc is a DVD;
The second content data is data recorded on a Blu-ray disc or HDDVD.

  Further, the optical disc apparatus of the present invention has the following configuration in order to solve the above problems.

(7) In an optical disc apparatus having playback means for reading and playing back the first content data from a first optical disc in which the first content data and the title name of the first content data are recorded in advance.
Communication means for acquiring a title name of the first content data from the first optical disc and transmitting the title name to a predetermined server via a network;
A buffer memory for sequentially storing the second content data when the communication means receives the second content data having the same title name as the second content data with higher definition than the first content data from the server. And having
The reproducing means includes
Performing streaming playback for sequentially reading and playing back the second content data from the buffer memory;
When the streaming reproduction is interrupted, the streaming reproduction is interrupted, and the first content data is reproduced from the interrupted position.

The optical disc apparatus having this configuration is used in the reproduction system (1).
Thereby, there exists an effect similar to said (1).

  According to the present invention, it is possible to prevent the content reproduction from being interrupted even if the communication line speed of the network temporarily decreases.

  Hereinafter, a playback system according to an embodiment of the present invention will be described.

FIG. 1 is a system configuration diagram of a playback system according to an embodiment of the present invention. The playback system 101 is connected to the Blu-ray player 2 in which the DVD 100 is set, the television (hereinafter referred to as “TV”) 3 connected to the Blu-ray player 2 via the interface, and the Blu-ray player 2 via the network 5. And a database (hereinafter referred to as “DB”) server 4.
The Blu-ray player 2 and the TV 3 are used at each user's home. The DB server 4 is a server provided on the network 5. That is, a plurality of Blu-ray players including the Blu-ray player 2 are connected to one DB server 4 via the network 5.

  The DVD 100 is a DVD-ROM manufactured in accordance with the DVD (Digital Versatile Disk) standard. The DVD 100 is a disc that the user has purchased and possessed in the past. Further, content data (hereinafter referred to as “SD data” if necessary) and the title name of the content in the DVD 100 are recorded in advance in the DVD-VIDEO format. It shall be. Further, the storage location of the SD data is specified by the reproduction time.

The Blu-ray player 2 plays the DVD 100 in addition to the Blu-ray disc. The Blu-ray player 2 reads content data from the DVD 100 and outputs it to the TV 3 via the interface. As a result, the Blu-ray player 2 plays back the SD image content on the TV 3.
The network 5 is, for example, the Internet.

  FIG. 2 is a block diagram showing the main configuration of a Blu-ray player used in the playback system. The Blu-ray player 2 includes a control unit 21 that controls the operation of each unit of the apparatus main body 2, a pickup head 22 that reads data from an optical disc (hereinafter referred to as a PU head 22), and playback such as an RF amplifier and a decoder. A circuit 23, an operation unit 27 for receiving user operations, a remote controller 27A for remotely operating the apparatus main body 2, and a NIC (Network Interface Card) 20 connected to the network 5 via a router (not shown). I have. Furthermore, the Blu-ray player 2 includes a buffer RAM that temporarily stores streaming data and a reproduction circuit 31 such as a decoder. Further, the Blu-ray player 2 includes a display unit 28 for displaying information, a storage unit 29 for storing data, an audio processing unit 24 for converting audio data into an analog reproduction audio signal, and an analog reproduction image signal for image data. When converted to, an OSD processing unit 25 that generates an OSD image and an image composition unit 26 that generates a composite image are provided.

  The PU head 22 includes a laser diode (LD), a collimator lens, a beam splitter, an objective lens, a photodetector, a thread motor, and an actuator (not shown).

The operation during playback will be described.
The PU head 22 irradiates the DVD 100 or Blu-ray disc (not shown) with laser light, and detects the reflected light from the DVD 100 or Blu-ray disc with a photo detector. Thereby, the PU head 22 optically reads data recorded on the DVD 100 or the Blu-ray disc.

  The reproduction circuit 23 generates an RF signal based on the outputs of the plurality of light receiving elements in the PU head 22, and amplifies the RF signal. Then, the reproduction circuit 23 processes the RF signal and extracts image and sound data. Here, the extracted image and sound data is temporarily stored in the buffer memory 23A built in the reproduction circuit 23. Then, the reproduction circuit 23 sequentially reads out these data from the buffer memory 23A and decodes them by, for example, MPEG. The reproduction circuit 23 outputs the audio data to the audio processing unit 24 and the image data to the image synthesis unit 26 while synchronizing these data. This synchronization is performed based on the reproduction time described in all of the content data. Specifically, the reproduction circuit 23 is synchronized by matching the reproduction time of the image data and the reproduction time of the audio data.

The audio processing unit 24 converts the audio data into an analog reproduced audio signal, and outputs the reproduced audio signal to the external TV 3.
If the TV 3 is digital compatible (for example, HDMI standard), it may be output digitally.

  The OSD processing unit 25 includes an OSD image memory (not shown) (not shown). The OSD image memory is composed of, for example, a flash memory. The OSD processing unit 25 generates an OSD image of characters or figures based on the data stored in the OSD image memory based on the control signal given from the control unit 21, and outputs it to the image composition unit 26.

  Based on the control signal supplied from the control unit 21, the image composition unit 26 generates a composite image obtained by combining the OSD image output from the OSD processing unit 25 with the image based on the image data output from the reproduction circuit 23. .

Then, the image composition unit 26 converts the composite image signal into an analog reproduction image signal and outputs the analog reproduction image signal to the external TV 3. Alternatively, the image composition unit 26 converts the image data output from the reproduction circuit 23 into an analog reproduction image signal and outputs the analog reproduction image signal to the external TV 3. Alternatively, the image composition unit 26 converts the OSD image data output from the OSD processing unit 25 into an analog reproduction image signal and outputs the analog reproduction image signal to the external TV 3. Here, the operations of these three patterns are switched by the control unit 21.
If the TV 3 is digital compatible (for example, HDMI standard), it may be output digitally.

  The TV 3 is connected to the audio processing unit 24 and the image synthesis unit 26 through an interface. The TV 3 processes the signal output from the Blu-ray player 2 and displays an image on the screen or outputs sound.

  The user can view an image based on the reproduced image signal output from the audio processing unit 24 and the image synthesizing unit 26 and an audio based on the reproduced audio signal on the TV 3. Thereby, the user views the content of the SD image recorded on the DVD 100. Alternatively, the user views the content of the HD image recorded on the Blu-ray disc (not shown).

The operation unit 27 is used by the user to input various commands (commands) to the Blu-ray player 2. The operation unit 27 is provided with a plurality of keys for receiving user operations. A command input by the user to the Blu-ray player 2 is transmitted to the control unit 21.
The plurality of keys include a reproduction key for instructing reproduction of the DVD 100 or the Blu-ray disc, a selection key for accepting selection of whether or not to reproduce HD data, and a designation key for accepting designation of a predetermined reproduction time. Here, details of the selection key and the designation key will be described later.

  The operation unit 27 is provided with a remote control signal detection unit (not shown). When a command such as power ON / OFF or playback instruction is input from the outside of the apparatus body to the remote control signal detection unit using the remote control 27A, the remote control signal detection unit receives the command signal from the remote control 27A. To the control unit 21. The remote controller 27A is provided with the same keys as the operation unit 27.

  The display unit 28 displays the current time, the setting state of the Blu-ray player 2, a predetermined message, and the like.

  The storage unit 29 is composed of, for example, an EEPROM. The storage unit 29 stores a control program in which a control method for each unit of the apparatus body 2 is described. Furthermore, the storage unit 29 stores the URL of the DB server 4. This URL is information indicating an address on the network 5.

  The control unit 21 is configured by a microcomputer, for example. The control unit 21 includes a RAM (not shown) as a work field for developing the control program and the like, and a timer circuit (not shown) for measuring the current time and measuring the time. The control unit 21 controls the operation of each unit of the Blu-ray player 2 in accordance with a command input from the user to the Blu-ray player 2.

  The control unit 21, the PU head 22, the reproduction circuit 23, the reproduction circuit 31, the audio processing unit 24, and the image synthesis unit 26 correspond to “reproduction means” of the present invention. The buffer RAM 30 corresponds to the “buffer memory” of the present invention. The control unit 21 and the NIC 20 correspond to “communication means” of the present invention. The operation unit 27 and the remote controller 27A correspond to the “designating unit” of the present invention.

  FIG. 3 is a block diagram showing the main configuration of the DB server used in the playback system. The DB server 2 includes a NIC (Network Interface Card) 40 connected to the network 5 via a router (not shown), a control unit 41 that controls the operation of each part of the DB server 2, and each part of the DB server 2. And a hard disk 42 for storing a control program in which a control method is described.

The control unit 41 is, for example, an MPU. Furthermore, the control unit 41 includes a RAM (not shown) as a work field for developing the control program.
The control unit 41 corresponds to “distribution means”. Further, the hard disk 42 corresponds to “storage means”.

FIG. 4 is a diagram showing the contents of the HD table 43 stored in the hard disk 42. The hard disk 42 further stores in advance an HD table 43 in which streaming files 43A to 43C are described for each title name. Each streaming file 43A to 43C stores HD streaming data including HD image and audio contents. The storage location of the HD streaming data is specified by the playback time. The contents of the HD table 43 are updated to the latest information every week, for example. Therefore, the number of title names in this list increases each time a Blu-ray Disc is released.
Note that the HD streaming data stored in each of the streaming files 43A to 43C corresponds to the “second content data” of the present invention.
In this embodiment, the HD streaming data is data indicating HD content including HD images and audio. However, in the implementation, data indicating content including only HD images may be used.

  FIG. 5 is a flowchart showing the operation of each control unit in the Blu-ray player 2 and the DB server 4 in the playback system according to the embodiment of the present invention.

When the user sets the DVD 100 in the Blu-ray player 2 (S1), the control unit 21 of the Blu-ray player 2 causes the PU head 22 to read the title name of the DVD 100 from the DVD 100 (S2). This title name is, for example, the title name of a movie. The title name is described in advance in the control information (eg, NAVI information) of the DVD 100 together with the movie distributor. The content data of the DVD 100 is data including SD image and audio content.
Note that the title name of the read DVD 100 is input to the control unit 21 via the reproduction circuit 23.

Then, the control unit 21 transmits the acquired title name of the DVD 100 from the NIC 20 to the DB server 4 (S3). Thereby, the DB server 4 receives the title name of the DVD 100 transmitted via the network 5 by the NIC 40.
Here, S3 will be described in detail. The URL (Uniform Resource Locator) of the DB server 4 is stored in the storage unit 29 in advance. Further, the IP address assigned to the Blu-ray player 2 is also stored in the storage unit 29 in advance. Therefore, the control unit 21 transmits the title name of the DVD 100 to the DB server 4 together with the IP address, with this URL as the destination.
The IP address is an identification number that identifies the Blu-ray player 2 on the network 5. The IP address is information indicating the location of the Blu-ray player 2 on the network 5.

  The control unit 41 of the DB server 4 searches whether the title name of the DVD 100 received by the NIC 40 is in the title name list of the HD table 43 (S11). For example, in FIG. 4, if the title name of the DVD 100 is “Wild Bird Story 1”, it is in the list of the HD table 43, so the control unit 41 can find the same title name. On the other hand, if the title name of the DVD 100 is “Wild Bird Story 3”, it is not in the list of the HD table 43, so the control unit 41 cannot find the same title name. In this case, the search result is a result that it could not be found.

Then, the control unit 41 returns the search result of S11 from the NIC 40 to the Blu-ray player 2 (S12). Thereby, the Blu-ray player 2 receives the search result of S11 transmitted through the network 5 by the NIC 20.
In detail, S12 returns the search result of S11 to the Blu-ray player 2 with the IP address of the Blu-ray player 2 as the destination.

  When the NIC 20 receives the search result, the control unit 21 of the Blu-ray player 2 obtains HD data having the same title name as the title name of the SD data recorded on the DVD 100 set in the apparatus body 2 from the search result. It is determined whether it has been uploaded to the server 4 (S4). If it has not been uploaded, the control unit 21 ends this process. Thereafter, when the user presses the reproduction key, the Blu-ray player 2 reproduces the DVD 100.

On the other hand, if uploaded, the control unit 21 displays on the TV 3 or the display unit 28 a selection message that prompts the user to select whether or not to reproduce content with a higher resolution than the content of the DVD 100 set in the apparatus main body 2. (S5). This selection message is, for example, “The same title with high resolution is stored on the server. You can watch higher resolution content than the currently set DVD. Will it be played?” . The user sees this selection message and selects whether or not to reproduce the HD streaming data with the selection key according to his / her usage method.
In S5, it is also possible to charge for the reproduction of high-resolution content and display the fee for the reproduction together with the selection message. In this case, for example, “Same titles with high resolution are stored on the server. You can enjoy higher resolution content than the currently set DVD. 300 yen is required for playback. Is displayed? "Is displayed.

  Then, the control unit 21 determines whether or not playback of HD streaming data is selected with the selection key (S6). If playback of HD streaming data is not selected, the control unit 21 ends this process. Thereafter, when the user presses the reproduction key, the Blu-ray player 2 reproduces the DVD 100.

  If playback of HD streaming data is selected, the control unit 21 performs authentication to determine whether the DVD 100 is an original product (S7). This authentication is performed based on whether or not the SD data of the DVD 100 is properly encrypted. For example, first, an appropriate CSS (Content Scrambling System) key is stored in advance in the hard disk 42 in association with each title name (see FIG. 4). The CSS key is a decryption key for decrypting encrypted SD data. Further, the control unit 21 acquires a title name from the DVD 100. Then, the control unit 21 communicates with the DB server 2 to check the CSS key corresponding to the title name, and checks whether the same CSS key is recorded on the DVD 100. When the same CSS key is not recorded on the DVD 100, that is, when the DVD 100 is not properly encrypted, the control unit 21 regards the DVD 100 as a copy product.

Therefore, when it is determined that the DVD 100 is a copy product, the control unit 21 ends this process. That is, the control unit 21 prohibits playback of HD streaming data.
In implementation, S7 may be passed through.

  On the other hand, if it is determined in S7 that the DVD 100 is an original product, the control unit 21 requests the DB server 4 to provide HD streaming data (S8).

  When requested, the control unit 41 reads HD streaming data corresponding to the title name of the DVD 100 from the hard disk 42 and distributes it to the Blu-ray player 2 via the network 5 (S13).

  When distribution of HD streaming data from the DB server 4 starts, the Blu-ray player 2 executes streaming playback processing (S9). As a result, when the title name of the DVD 100 is “Wild Bird Story 1”, the streaming file 43A is streamed and reproduced.

  As described above, the playback system 101 plays back high-definition content using the DVD 100 already owned by the user. This eliminates the need for the user to newly purchase a Blu-ray disc on which the same content as the DVD 100 is recorded.

  However, the communication line speed of the network 5 often decreases temporarily due to various environmental factors. In addition, since streaming data includes at least HD images, the amount of data is large.

  Therefore, in the present embodiment, a buffer RAM 30 and a playback circuit 31 for processing HD data are provided separately from the playback circuit 23 for processing SD data to prevent content playback from being interrupted. Specifically, the configuration was as follows.

  FIG. 6 is a flowchart showing an operation at the time of streaming playback processing of the control unit in the Blu-ray player. FIG. 7A is a timing chart of the playback time axis at the time of streaming playback processing. FIG. 7 (2) is a diagram showing streaming data reproduced in the timing chart. FIG. 8 is a diagram showing the amount of data stored in the buffer RAM of the Blu-ray player. FIG. 8A is a diagram showing a state when the data amount of 80% of the capacity of the buffer RAM 30 is accumulated. FIG. 8B is a diagram showing a state when the capacity of the buffer RAM 30 becomes empty. Here, FIG. 7 (A) corresponds to FIG. 8 (A), and FIG. 7 (B) corresponds to FIG. 8 (B).

  When the streaming playback process is executed in S9 of FIG. 5, the control unit 21 sequentially stores the HD streaming data 50 distributed from the DB server 4 in the buffer RAM 30 (S101).

  When a certain amount of HD streaming data 50 accumulates (see, for example, FIG. 8A), the control unit 21 instructs the playback circuit 31 to sequentially read and play back the HD streaming data 50 in the buffer RAM 30 (S102). Then, the control unit 21 monitors the data amount in the buffer RAM 30 (S103). Thereby, for example, when the title name of the DVD 100 is “Wild Bird Story 1”, the HD streaming data 50 of the streaming file 43A is streamed (see FIG. 7A). To describe S102 in detail, the HD streaming data 50 distributed from the DB server 4 is received by the NIC 20 and accumulated in the buffer RAM 30. The reproduction circuit 31 sequentially reads the stored HD streaming data 50 from the buffer RAM 30 and decodes it (for example, in MPEG). The reproduction circuit 31 outputs the audio data to the audio processing unit 24 and the HD image data to the image synthesis unit 26 while synchronizing these data. The subsequent operation is the same as the operation during reproduction.

  A case where audio data is not included in the HD streaming data 50, that is, a case where the HD streaming data 50 is data indicating content including only HD images will be described. In this case, during streaming playback, the control unit 21 plays back HD streaming data 50 for images and SD data for audio while synchronizing both. The HD image data of the HD streaming data 50 is reproduced by the reproduction circuit 31, and the audio data of the SD data is reproduced by the reproduction circuit 23. The synchronization is performed when the control unit 21 matches the playback time of HD image data and the playback time of audio data of SD data. Thus, streaming playback is also performed when the HD streaming data 50 indicates only the content of the HD image. Here, when the audio data is not included in the HD streaming data 50, the data amount of the streaming data 50 is small because the audio data is not distributed. Therefore, the case where streaming reproduction is interrupted can be reduced.

  As shown in FIG. 8B, when the data amount of the buffer RAM 30 becomes empty (S103), the control unit 21 stops the streaming reproduction and simultaneously reproduces the DVD 100 (S104, S105). That is, when the streaming playback is interrupted, the control unit 21 interrupts the streaming playback and plays back the SD data of the DVD 100 from the interrupted position (see FIG. 7B). Thereby, the sound based on the sound data and the SD image based on the SD image data are reproduced on the TV 3. Therefore, even if the communication line speed of the network 5 is temporarily reduced, it is possible to prevent the content reproduction from being interrupted. Therefore, there is no need to make the user wait due to the interruption of content reproduction.

  Here, while monitoring in S103, the control unit 21 causes the PU head 2 to search the storage position on the DVD 100 of the SD data having the same playback time as the playback time of the HD image data being played back. For this reason, when streaming playback is interrupted, the control unit 21 knows the storage position. When streaming playback is interrupted, the control unit 21 causes the PU head 2 to read the DVD 100 from the storage location being searched, and plays back the SD data. Thereby, when streaming reproduction is interrupted, it is possible to smoothly shift to reproduction of SD data having the same reproduction time.

  When the streaming reproduction is interrupted, the control unit 21 requests the DB server 4 to distribute the streaming data 50 after the predetermined reproduction time (S106). This request is transmitted from the NIC 20 and input to the DB server 4 via the network 5. Then, the DB server 4 analyzes the streaming file 43A and returns a request result to the control unit 21. Here, the predetermined reproduction time ahead is, for example, 30 seconds ahead (see FIG. 7C). The user estimates the data amount of the buffer RAM 30 and the actual communication line speed at which the streaming reproduction is stably continued when the streaming reproduction is resumed, and designates the predetermined reproduction time destination in advance with a designation key. Thereby, the user can designate the predetermined reproduction time ahead according to his / her usage method.

  Based on the request result from the DB server 4, the control unit 21 determines whether there is streaming data 50 after the predetermined playback time (S107). Here, when there is streaming data 50 after a predetermined playback time, the streaming data 50 after the predetermined playback time is delivered from the DB server 4.

  When determining that there is streaming data 50 after the predetermined playback time, the control unit 21 sequentially stores the HD streaming data 50 distributed from the DB server 4 in the buffer RAM 30 (S108).

When the playback time of the SD data reaches a predetermined playback time ahead after the streaming playback is interrupted (S109), the streaming playback using the HD streaming data 50 is re-executed (S110). Then, the control unit 21 returns to S103 and continues the process. As a result, the HD image is reproduced again without interruption of the content reproduction. Thereby, the user can view the HD image again.
When the HD streaming data 50 is data indicating HD content including only HD images, the control unit 21 stops only reproduction of SD images simultaneously with S110. When the HD streaming data 50 is data indicating HD content including both HD images and audio, the control unit 21 stops the reproduction of the DVD 100 simultaneously with S110.

  On the other hand, if it is determined in S107 that there is no streaming data 50 after the predetermined playback time, the control unit 21 waits until the end of the SD data being played back is reached, that is, until all SD data is played back. (S111). Then, when reaching the end of the SD data, the control unit 21 ends the reproduction of the DVD 100 (S112). Finally, the control unit 21 ends the subroutine and returns to the main routine.

The system block diagram of the reproduction | regeneration system which is embodiment of this invention Block diagram showing the main components of a Blu-ray player used in the playback system Block diagram showing the main configuration of the DB server used in the playback system The figure which shows the content of HD table 43 memorize | stored in the hard disk 42 The flowchart which shows operation | movement of each control part in the Blu-ray player 2 and DB server 4 in the reproduction | regeneration system which is embodiment of this invention. The flowchart which shows the operation | movement at the time of the streaming reproduction process of the control part in a Blu-ray player Timing chart of playback time axis during streaming playback processing The figure which shows the data amount memorize | stored in the buffer RAM of a Blu-ray player

Explanation of symbols

2-Blu-ray player 3-TV
4-DB server 5-Network 20-NIC
21-Control unit 22-Pickup head 23-Reproduction circuit 23A-Buffer memory 24-Audio processing unit 26-Image composition unit 27-Operation unit 27A-Remote control 28-Display unit 29-Storage unit 30-Buffer RAM
31-Reproduction circuit 40-NIC
41-control unit 42-hard disk 43-HD table 100-DVD
101-Reproduction system

Claims (7)

An optical disc apparatus having a reproducing means for reading and reproducing the first content data from a first optical disc in which the first content data and the title name of the first content data are recorded in advance;
A server connected to the optical disc device via a network and storing second content data of higher definition than the first content data for each title name;
In a playback system with
The optical disc apparatus includes a communication unit that acquires a title name of the first content data from the first optical disc and transmits the title name to the server via the network.
The server distributes the second content data having the same title name as the title name of the first content data transmitted from the communication means to the optical disc apparatus by streaming via the network;
The optical disc apparatus has a buffer memory for sequentially storing the second content data distributed from the server,
The reproducing means includes
Performing streaming playback for sequentially reading and playing back the second content data from the buffer memory;
When the streaming reproduction is interrupted, the streaming reproduction is interrupted, and the first content data is reproduced from the interrupted position. The reproducing means includes
Searching for the storage location on the first optical disc of the first content data having the same playback time as the playback time of the second content data being streamed immediately before the streaming playback is interrupted,
The reproduction system according to claim 1, wherein when the streaming reproduction is interrupted, the first content data is reproduced by reading the first optical disk from the storage location being searched. When the streaming reproduction is interrupted, the communication means requests the server to distribute the second content data after a predetermined reproduction time ahead,
The buffer memory sequentially stores the second content data distributed from the server after the predetermined playback time,
The playback unit re-executes the streaming playback using the second content data when the playback time of the first content data reaches the predetermined playback time ahead after the streaming playback is interrupted. 2. The reproduction system according to 2. The first content data is data indicating image and audio content;
The second content data is data indicating only image content,
4. The playback device according to claim 1, wherein the playback unit plays back the second content data for an image and the first content data for an audio while synchronizing the two during the streaming playback. 5. The described playback system.   5. The reproduction system according to claim 3, wherein the optical disc apparatus includes a designation unit that receives designation of the predetermined reproduction time. The first optical disc is a DVD;
The reproduction system according to any one of claims 1 to 5, wherein the second content data is data recorded on a Blu-ray disc or HDDVD. In an optical disc apparatus having playback means for reading and playing back the first content data from a first optical disc in which first content data and a title name of the first content data are recorded in advance.
Communication means for acquiring a title name of the first content data from the first optical disc and transmitting the title name to a predetermined server via a network;
A buffer memory for sequentially storing the second content data when the communication means receives the second content data having the same title name as the second content data with higher definition than the first content data from the server. And having
The reproducing means includes
Performing streaming playback for sequentially reading and playing back the second content data from the buffer memory;
An optical disc apparatus that interrupts the streaming reproduction when the streaming reproduction is interrupted and reproduces the first content data from the interruption.

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