JP4042224B2 - Data transceiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data transmission / reception method for transmitting / receiving data recorded on a recording medium such as an optical disk or a magnetic tape via a digital interface such as IEEE1394.
[0002]
[Prior art]
In recent years, the IEEE 1394 system has attracted attention as a digital data serial transmission system. The IEEE 1394 system can be used not only for the transmission of computer data by the conventional SCSI system or the like, but also for the transmission of AV data. This is because the IEEE1394 system defines two communication methods, asynchronous communication and isochronous communication. Isochronous communication is a data transmission method that can be used to transmit data such as AV data that requires real-time performance. In isochronous communication, a band necessary for transmitting data is acquired prior to the start of transmission. Then, data transmission is performed using the band. Thereby, real-time property of data transmission is guaranteed. On the other hand, asynchronous communication is a transmission method used for transmission of data that does not require real-time performance, such as transmission of computer data. This can be considered as a method equivalent to a transmission method such as a conventional SCSI method.
[0003]
Various methods have been proposed as higher-level transmission protocols on IEEE 1394, and one of them is called AV protocol. The AV protocol is standardized as IEC61883, and defines a method for transmitting and receiving AV data that requires real-time characteristics through isochronous communication, a method for transmitting and receiving control commands given to devices through asynchronous communication, and the like. Yes.
[0004]
As one of the control command systems, there is an AV / C command. In the AV / C command, a control command for a VCR or the like is defined. The AV / C command defines a method for expressing information owned by a device (device status, recording medium management information, etc.) using a list structure. This method will be described with reference to FIG. 12 as a conventional example.
[0005]
FIG. 12 is a schematic diagram showing an example of a list structure defined by the AV / C command. As shown in the diagram of the list A2001, the list includes a list header 2002 and zero or more objects 2003. The list header 2001 describes information about the entire list A2001. An object corresponds to a unit such as an audio track recorded on a disc, for example, and management information related to each audio track is described in the object 2003, for example. Further, the object can have the same concept as a directory in a computer file system, and thus a list having a hierarchical structure can be expressed. FIG. 12 shows a case where the object # 3 of the list A2001 is an object indicating a directory, and a case where the list B is included as a list in the hierarchy below the object # 3 of the list A2001.
[0006]
By generating such a list inside the device and accessing the list via the IEEE 1394, the external device can obtain information owned by the counterpart device.
[0007]
When the object includes management information such as AV data, the AV data recorded on the recording medium is reproduced by designating the object ID and sending a reproduction command to the device. You can also. Further, when a reproduction command is sent to the device by designating a list, AV data is reproduced in the order described in the list.
[0008]
Various information can be described using this list structure. For example, in the case of a device that handles an AV disc, the contents recorded on the disc can be described, and the order of program playback can be described. By accessing the list describing the order of program playback from the outside, it is also possible to specify the order of program playback from an external device.
[0009]
[Problems to be solved by the invention]
However, in the above-described conventional method, when accessing text information or a text file that is attribute data of AV data from an external device, the text information and the text file are accessed when following the link from the management information of the AV data. The procedure for accessing the network was different, and access from external devices was difficult.
[0010]
Further, in the above conventional method, when the external device newly writes information such as a title when accessing the text information or text file that is the attribute data of the AV data from the external device, the writing position of the external device is changed. It had to be set and the process was complicated.
[0011]
Further, in the above conventional method, when AV data is deleted, the external device has to delete other objects linked from the object corresponding to the deleted AV data, and the processing is complicated. .
[0012]
In the above conventional method, when the AV data recorded on the recording medium is divided by a command from the external device, the external device generates an object corresponding to the management information corresponding to the newly generated AV data. It was necessary and processing was complicated.
[0013]
In the above conventional method, AV data, still image data, text file, and other data are reproduced in a synchronized manner under the control of the external device, and the output timing of the still image data is controlled from the external device. The method of doing was also complicated.
[0014]
In the above conventional method, there is no distinction between a list describing a synchronous reproduction method recorded on a recording medium and a list describing a user-defined synchronous reproduction method, and control from an external device is complicated.
[0015]
As described above, the conventional method has a number of problems.
The present invention solves the above-described conventional problems, and when accessing text information and text files, which are attribute data of AV data, from an external device, when accessing by following a link from AV data management information. Another object of the present invention is to provide a data transmitting / receiving apparatus capable of unifying the procedure for accessing text information and text files.
[0016]
In addition, when the external device writes new information such as a title when accessing the text information or text file that is the attribute data of the AV data from the external device, it is not necessary to set the writing position of the external device. An object is to provide a data transmitting / receiving apparatus.
[0017]
It is another object of the present invention to provide a data transmitting / receiving apparatus in which, when AV data is deleted, it is not necessary for an external device to delete another object linked from the object corresponding to the deleted AV data.
[0018]
Further, when AV data recorded on a recording medium is divided by a command from an external device, data transmission / reception that does not require the external device to generate an object corresponding to management information corresponding to the newly generated AV data An object is to provide an apparatus.
[0019]
In addition, AV data, still image data, text files, and other data can be easily played back in synchronization with control from an external device, and the output timing of still image data can also be controlled from the external device in a simple manner. An object of the present invention is to provide a data transmission / reception apparatus capable of performing the above.
[0020]
It is another object of the present invention to provide a data transmitting / receiving apparatus capable of easily distinguishing between a list describing a synchronous reproduction method recorded on a recording medium and a list describing a user-defined synchronous reproduction method.
[0026]
[Means for Solving the Problems]
  To achieve the above objective,A data transmission / reception apparatus according to the present invention is a data transmission / reception apparatus that transmits and receives data via a digital interface, and includes first management information and second content that are management information of a first content group recorded on a recording medium. Data holding means for storing second management information as group management information, and list conversion means for mutually converting the first and second management information and the list held by the data holding means And a data transmission / reception means for transmitting / receiving a list to be converted by the list conversion means via the digital interface, wherein the list conversion means corresponds to each of the first and second management information for one content. A first list composed of objects of the first management information, and the second management information. Of generating a second list consisting of an object group, and generates a third list of describing the second reproduction order and reproduction timing of content groups during the first content-group reproductionWhen the third list is changed from an external device, information indicating whether the change is reflected on the recording medium is described in the third list.It has a configuration.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
A first embodiment of a data transmitting / receiving apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a data transmitting / receiving apparatus comprising recording / reproducing signal processing means 101, system control means 103, data holding means 104, data transmitting / receiving means 105, optical head 106, optical disk 107, digital interface 108, and list converting means 109. FIG.
[0028]
The operation of the data transmitting / receiving apparatus of FIG. 1 will be described. Here, it is assumed that audio data, data attached to the audio data, and management information of these data are recorded on the optical disc 107. The data transmitting / receiving apparatus in FIG. 1 reproduces management information data when the optical disk 107 is loaded. The reproduced data is subjected to processing such as demodulation and ECC decoding by the recording / reproduction signal processing means 101 and input to the system control means 103. The management information data input to the system control unit 103 is input to the data holding unit 104 and held by the data holding unit 104.
[0029]
It is assumed that a text data file including lyrics and artist information is recorded as ancillary data of audio data recorded on the optical disc 107. The management information data held by the data holding means 104 includes audio data playback time, title, number of audio data (number of songs), relationship between audio data and text data file (which text data file corresponds to which audio data). Suppose that there is information attached), the size of the text data file, etc.
[0030]
Here, a case where audio data management information of the optical disc 107 is input / output from an external device via the digital interface 108 will be described. Management information is input and output by expressing management information using a list structure and accessing (reading and writing) the list.
[0031]
When a command packet for reading management information of audio data recorded on the optical disc 107 is input from the external device to the data transmission / reception unit 105 via the digital interface 108, the data transmission / reception unit 105 analyzes the header of the command packet. The command is input to the system control means 103. When receiving the read command, the system control unit 103 outputs the management information held in the data holding unit 104 to the list conversion unit 109. When receiving the management information from the data holding unit 104, the list conversion unit 109 converts the management information into a predetermined list structure and outputs it to the system control unit 103. The system control unit 103 outputs the list input from the list conversion unit 103 to the data transmission / reception unit 105, and the data transmission / reception unit 105 adds a header to the list to form a packet and outputs the packet to the digital interface 108. .
[0032]
When a packet indicating a command for writing management information of audio data recorded on the optical disc 107 is input to the data transmission / reception unit 105 from the external device via the digital interface 108, the data transmission / reception unit 105 displays a packet header or the like. Analysis is performed and the command is input to the system control means 103. When the system control unit 103 receives the write command, the system control unit 103 performs the writing described in the write command on the list held by the list conversion unit 109. The changes made to the list conversion unit 109 are also made to the management information held in the data holding unit 104. The system control unit 103 reads the management information held in the data holding unit 104 when the optical disc 107 is ejected, and records the management information on the optical disc 107 via the recording / reproducing signal processing unit 101.
[0033]
The structure of the list generated by the list conversion means 109 is shown in FIG. FIG. 2 is a schematic diagram showing the structure of the content list 271, the audio list 201, the title list 231, and the text file list 251. Here, it is assumed that audio data for two songs A and B is recorded on the optical disc 107. Here, of the audio data management information, the title information is expressed by the title list 231 independently of the content list 271.
[0034]
The content list 271 is a list showing the entire data recorded on the optical disc 107. The content list 271 includes first to third objects 273 to 275. The first to third objects 273 to 275 are objects representing directories, and each has an audio list 201, a title list 231 and a text file list 251 as a list one level below.
[0035]
The audio list 201 includes a list header 202, a first object 203, and a second object 204. Here, the first object 203 and the second object 204 correspond to the management information of the songs A and B, respectively (not the audio data itself). The list header 202 is composed of the number of songs (number of objects) 213. Here, the number of songs is two. Each of the first object 203 and the second object 204 includes playback times 221 and 224 of each song, pointers 222 and 225 to the titles of the songs, and pointers 223 and 226 to the text files of the songs.
[0036]
Each object in the title list 231 describes title data itself. Here, it is assumed that the title of the song A is described in the first object 233 and the title of the song B is described in the second object 234. The pointer 222 to the title in the first object 203 that is an object indicating the music piece A describes the link information (ID of the first object 233) to the first object 233 in the title list 231. Link information (ID of the second object 234) to the second object 234 in the title list 231 is described in the pointer 225 to the title in the second object 204 that is an object indicating the music B. As a result, the external device can search for the title corresponding to the object (song) from the audio list object held by the data transmitting / receiving apparatus via the digital interface 108. For example, when an external device wants to access the title of the song B, the content list 271 is first read to obtain the audio list ID. Then, the audio list 201 is read based on the audio list ID, and a pointer 225 to the title of the song B is obtained. Based on the pointer 225, the second object 234 of the title list 231, that is, the title 242 of the music B can be accessed.
[0037]
Each object of the text file list 251 describes management information related to the text file (not the text file data itself). The management information related to the text file includes information such as contents described in the text file (identifier of whether it is a lyrics file or an artist information file), a file size, a file creation date and time, and the like. Here, it is assumed that information about the text file of the music piece A is described in the first object 253 and information about the text file of the music piece B is described in the second object 254. Then, in the pointer 223 to the text file information in the first object 203 that is an object indicating the music piece A, link information (ID of the first object 253) to the first object 253 in the text file list 251 is described. Yes. In addition, in the pointer 226 to the text file information in the second object 204 that is an object indicating the song B, link information (ID of the second object 254) to the second object 254 in the text file list 251 is described. Yes. As a result, the external device can search for information of the text file corresponding to the object (song) from the audio list object held by the data transmitting / receiving apparatus via the digital interface 108. For example, when the external device wants to access the management information of the lyrics file of the song B, the content list 271 is first read to obtain the audio list ID. Then, the audio list 201 is read based on the audio list ID, and a pointer 226 to the text file information of the song B is obtained. Based on this pointer 226, the management information 263 of the lyrics file of the song B described in the second object 254 of the text file list 251 can be accessed. In addition, when reproducing and outputting the data of the lyrics file and the artist information file from the disc, the reproduction command (data output command) is transmitted from the external device to the data transmitting / receiving apparatus by designating the object of the text file list 251. Thus, data can be output.
[0038]
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which AV data, text data such as a title for AV data, and text files such as lyrics for AV data are recorded via a digital interface. In addition, the management information of the recording medium is expressed by a list structure. As the list structure, a list is generated for each piece of AV data management information, text data, and text file management information, and the AV data list object has a pointer to a list of related text data and text file management information. Is described.
[0039]
As described above, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file which is attribute data of AV data from an external device, it is accessed by following the link from the management information of AV data. be able to. In this case, since the text information and the text file are described in the same configuration, the external device can access the text information and the text file in the same procedure, and simplifies access from the external device. be able to.
[0040]
(Embodiment 2)
A second embodiment of the data transmitting / receiving apparatus of the present invention will be described with reference to FIGS.
[0041]
The basic operation of the data transmitting / receiving apparatus of FIG. 1 is the same as that of the first embodiment.
[0042]
The structure of the list generated by the list conversion means 109 is shown in FIG. FIG. 3 is a schematic diagram showing the structure of the content list 271, the audio list 201, the title list 231, and the text file list 251. Here, it is assumed that audio data for two songs A and B is recorded on the optical disc 107.
[0043]
The basic structures of the content list 271, the audio list 201, the title list 231, and the text file list 251 are the same as those in the first embodiment. In the second embodiment, the operation when the title information and text file of the song B are not recorded on the optical disc 107 will be described.
[0044]
At this time, there is a second object 334 that is an object corresponding to the song B in the title list 231, but the content (title 342) is not described at all and is empty. Here, a case where the external device writes the title of the song B will be described. First, the content list 271 is read to obtain the audio list ID. Then, the audio list 201 is read based on the audio list ID, and a pointer 225 to the title of the song B is obtained. Thereby, it can be seen that the title of the song B should be described in the second object 334 of the title list 231. Then, the external device writes the desired title in the second object 334 of the title list 231. Thereby, the title 342 can be added to the song B recorded on the optical disc 107 from the external device.
[0045]
The text file list 251 includes a second object 354 that is an object corresponding to the song B, but the contents (the lyrics file management information 363 and the artist information file management information 364) are not described and are empty. State. Here, a case where the external device writes management information of the lyrics file of the song B will be described. First, the content list 271 is read to obtain the audio list ID. Then, the audio list 201 is read based on the audio list ID, and a pointer 226 to the text file information of the song B is obtained. Thereby, it can be seen that the text file information of the song B should be described in the second object 354 of the text file list 251. Then, the external device writes the management information of the desired lyrics file in the lyrics life management information 363 in the second object 354 of the text file list 251. Thereby, the management information of the text file can be added to the song B recorded on the optical disc 107 from the external device.
[0046]
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which AV data, text data such as a title for AV data, and text files such as lyrics for AV data are recorded via a digital interface. In addition, the management information of the recording medium is expressed by a list structure. As the list structure, a list is generated for each piece of AV data management information, text data, and text file management information, and the AV data list object has a pointer to a list of related text data and text file management information. Is described. At this time, if text data corresponding to AV data or the like is not recorded on the recording medium, an object in the list such as text data is left empty.
[0047]
As described above, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file which is attribute data of AV data from an external device, it is accessed by following the link from the management information of AV data. be able to. In this case, since the text information and the text file are described in the same configuration, the external device can access the text information and the text file in the same procedure, and simplifies access from the external device. be able to. At this time, an empty object is generated even if text information such as a title is not recorded on the recording medium, so when an external device newly writes information such as a title, a writing position is set in advance. Can be kept.
[0048]
(Embodiment 3)
A third embodiment of the data transmitting / receiving apparatus of the present invention will be described with reference to FIG. 1, FIG. 2, and FIG.
[0049]
The basic operation of the data transmitting / receiving apparatus of FIG. 1 is the same as that of the first embodiment. It is assumed that the same data as that in the first embodiment is recorded on the optical disc 107. That is, the structure of the list generated by the list conversion means 109 in the initial state is as shown in FIG.
[0050]
Now, the operation of the data transmitting / receiving apparatus when the song B is deleted will be described. At this time, the second object 204 of the audio list 201 which is an object corresponding to the music B is deleted. As a result, the playback time 224, the title pointer 225, and the text file information pointer 226, which are the contents of the second object 204, are also deleted. The destination pointed by the pointer 225 to the title, that is, the second object 234 in the title list 231 and the destination pointed by the pointer 226 to the text file information, that is, the second object 254 in the text file list 251 are also deleted. The Deletion of these objects means deletion of the title 242, the lyrics file management information 263, and the artist information file management information 264.
[0051]
With the above operation, the list structure generated by the list conversion means 109 after the music B is deleted is as shown in FIG.
[0052]
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which AV data, text data such as a title for AV data, and text files such as lyrics for AV data are recorded via a digital interface. In addition, the management information of the recording medium is expressed by a list structure. As the list structure, a list is generated for each piece of AV data management information, text data, and text file management information, and the AV data list object has a pointer to a list of related text data and text file management information. Is described. When the AV data is deleted, the object in the title list and the object in the text file linked from the object corresponding to the deleted AV data are also deleted at the same time.
[0053]
As described above, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file which is attribute data of AV data from an external device, it is accessed by following the link from the management information of AV data. be able to. In this case, since the text information and the text file are described in the same configuration, the external device can access the text information and the text file in the same procedure, and simplifies access from the external device. be able to. At this time, when the AV data is deleted, the object in the title list and the object in the text file linked from the object corresponding to the deleted AV data are also deleted at the same time. The management information and management information (text information and text file) corresponding to is not required to be deleted by the external device, and the list management can be unified. In addition, the contents recorded on the recording medium can be immediately reflected in the list.
[0054]
(Embodiment 4)
A fourth embodiment of the data transmitting / receiving apparatus of the present invention will be described with reference to FIGS.
[0055]
The basic operation of the data transmitting / receiving apparatus of FIG. 1 is the same as that of the first embodiment. It is assumed that the same data as that in the first embodiment is recorded on the optical disc 107. That is, the structure of the list generated by the list conversion means 109 in the initial state is as shown in FIG.
[0056]
Now, the operation of the data transmission / reception apparatus when song B is divided into song Ba and song Bb will be described with reference to FIG. At this time, the second object 204 of the audio list 201, which is an object corresponding to the music B, is divided into two to become a second object 504 and a third object 505. Here, the configuration of the second object 504 is the same as that of the second object 204 before being divided. However, the reproduction time 224 is shorter by the divided amount.
[0057]
Similarly to the first object 203 and the second object 504, the third object 505, which is a newly generated object, includes a playback time 527, a pointer 528 to a title, and a pointer 529 to text file information.
[0058]
A new third object 535 is generated in the title list 231, and a pointer (ID) to the third object 535 in the title list 231 is described in the title pointer 528. The content of the third object 535 in the title list 231 is the title 543 of the song Bb. The content of the title 543 at the time of the division can be in a state where the content of the title of the song B is copied as it is, or is empty.
[0059]
Further, a new third object 555 is generated in the title file list 251, and a pointer (ID) to the third object 555 in the title file list 251 is described in the title pointer 529. The contents of the third object 555 in the title file list 251 have the same configuration as that of the first object 253 and the second object 254, and are composed of lyrics file management information 565 and artist information file management information 566 corresponding to the song Bb. Is done. The lyrics file (text file itself) of the song Bb when the song B is divided can take a state such as a file containing the lyrics data from the time when the song B is divided, or an empty file. The artist information file (text file itself) of the song Bb at the time when the song B is divided can be in a state of a copy of the artist information file of the song B or an empty file. The contents (for example, file size) of the lyrics file management information 565 and the artist information file management information 566 corresponding to the song Bb are determined according to the state of the text file.
[0060]
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which AV data, text data such as a title for AV data, and text files such as lyrics for AV data are recorded via a digital interface. In addition, the management information of the recording medium is expressed by a list structure. As the list structure, a list is generated for each piece of AV data management information, text data, and text file management information, and the AV data list object has a pointer to a list of related text data and text file management information. Is described. When certain AV data is divided, the text data and text file management information corresponding to the newly generated AV data is added as a new object to the list of text data and text file management information. . Then, in the object corresponding to the newly generated AV data, the link information for the newly generated text data and the management information object of the text file is described.
[0061]
As described above, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file which is attribute data of AV data from an external device, it is accessed by following the link from the management information of AV data. be able to. In this case, since the text information and the text file are described in the same configuration, the external device can access the text information and the text file in the same procedure, and simplifies access from the external device. be able to. At this time, when certain AV data is divided, an object in the title list and an object in the text file are also generated for the AV data newly generated by the division, and the newly generated AV data is generated. Link from the object. Therefore, even when AV data recorded on the recording medium is divided by a command from the external device, management information and management information (text information and text file) corresponding to the newly generated AV data are generated from the external device. There is no need to generate a corresponding object, so that list management can be unified and processing can be simplified.
[0062]
(Embodiment 5)
A fifth embodiment of the data transmitting / receiving apparatus of the present invention will be described with reference to FIGS. The basic operation of the data transmitting / receiving apparatus of FIG. 1 is the same as that of the first embodiment.
[0063]
Here, audio data (songs A and B), still image data (A to D), and text files (lyrics file and artist information file) attached to the disks and songs A and B are recorded on the optical disk 107. To do.
[0064]
The structure of the list generated by the list conversion means 109 is shown in FIG. FIG. 6 is a schematic diagram showing the structure of the content list 271, the audio list 601, the still image list 631, and the text file list 651.
[0065]
The content list 271 is a list showing the entire data recorded on the optical disc 107. The content list 271 includes first to third objects 273 to 275. The first to third objects 273 to 275 are objects representing directories, and each have an audio list 601, a title list 631, and a text file list 651 as a list one level below.
[0066]
The audio list 601 includes a list header 602, a first object 603, a second object 604, and a third object 605. Here, the first object 603 corresponds to the entire disc, and the second object 604 and the third object 605 correspond to the management information of the songs A and B, respectively. The list header 602 includes the number of objects 613. Here, the number of objects is three.
[0067]
The first object 603 includes management information 621 for the entire disk and a pointer 622 to text file information. Here, the text file that is pointed to by the pointer 622 to the text information is a text file that represents the entire disc. For example, a text file such as artist information when only audio data generated by one artist is recorded. It is. Such a text file is used for the purpose of reproduction when the disc is stopped, for example. The second object 604 and the third object 605 are composed of management information (reproduction time, recording date and time, data format, etc.) 623, 625 and pointers 624, 626 to text file information, respectively.
[0068]
The still image list 631 includes a list header 632 and a first object 633 to a fourth object 636. The first object 633 to the fourth object 636 correspond to the still images A to D, respectively. The first object 633 to the fourth object 636 include management information (data size, data format, etc.) 641 to 644 of the still images A to D, respectively. Here, the still image A including the management information as the first object is a still image representing the entire disc, and is, for example, a jacket picture. Such a still image is used for the purpose of playing back, for example, when the disc is stopped.
[0069]
The text file list 651 includes a list header 652 and a first object 653 to a third object 655. The first object 653 includes management information of a text file representing the entire disc, and here includes artist information file management information 662. The second object 654 indicates management information of a text file that is data attached to the music piece A, and includes management information 663 of an artist information file. The third object 655 indicates management information of a text file that is data attached to the song B, and includes management information 664 of an artist information file.
[0070]
In addition, pointers 622, 624, and 626 to the text file information described in the first to third objects 603 to 605 of the audio list 601 respectively point to the first to third objects 653 to 655 of the text file list 651. Link information (IDs of the first to third objects 653 to 655 in the text file list 651) is described.
[0071]
As a result, the external device can search for information of the text file corresponding to the object (song) from the audio list object held by the data transmitting / receiving apparatus via the digital interface 108. For example, when the external device wants to access the management information of the lyrics file of the song B, the content list 271 is first read to obtain the audio list ID. Then, based on the audio list ID, the audio list 601 is read, and a pointer 626 to the text file information of the song B is obtained. Based on the pointer 626, the management information 664 of the lyrics file of the song B described in the third object 655 of the text file list 651 can be accessed.
[0072]
Also, since management information related to still images and text files representing the entire disc is described as the first objects of the still image list 631 and text file list 651, still images and text files representing the entire disc from an external device. When the management information is accessed, the content list 271 is read and the IDs of the still image list 631 and the text file list 651 are read, and then the first object of the still image list 631 and the text file list 651 is accessed. When reproducing still image data and text file data representing the entire disc, the content list 271 is read and the IDs of the still image list 631 and text file list 651 are read out, and then the still image list 631 and text file are read out. A first command in the list 651 is designated and a playback command (data output command) is transmitted from the external device to the data transmitting / receiving device.
[0073]
When a playback command is sent from an external device specifying the audio list 601, the first object 603 is ignored and playback is started from the second object (Song A). Thereby, the audio data can be reproduced in the order recorded on the optical disc 107.
[0074]
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which a text file such as AV data, still image data, and lyrics for AV data is recorded via a digital interface, Express management information in a list structure. As the list structure, a list is generated for each piece of AV data, still image data management information, and text file management information, and the AV data list object includes a list of related text data and text file management information. Describes a pointer. When generating this list, a still image or text file representing the recording medium is described as the first object in the list. In addition, the management information of the entire disc is described in the first object in the AV data management information list. When a playback command specifying an AV data list is transmitted from an external device, the head object in the AV data list is ignored and playback is started from AV data corresponding to the second object.
[0075]
As described above, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file which is attribute data of AV data from an external device, it is accessed by following the link from the management information of AV data. be able to. In this case, since the management information of the entire recording medium and the still image and text file representing the recording medium are described as the top object of the list, the top of each list is always an object that represents the entire recording medium. Therefore, it is possible to unify the list structure and simplify access when accessing these data or management information of these data from an external device. Also, when a playback command specifying a list of AV data is transmitted from an external device, playback starts from the AV data corresponding to the second object, so playback is performed correctly in the order of AV data recorded on the recording medium. It can be carried out.
[0076]
(Embodiment 6)
A sixth embodiment of the data transmitting / receiving apparatus of the present invention will be described with reference to FIGS. 1, 6, 7, 8, and 9. FIG. The basic operation of the data transmitting / receiving apparatus of FIG. 1 is the same as that of the first embodiment.
[0077]
Here, audio data (songs A and B), still image data (A to D), and text files (lyrics file and artist information file) attached to the disks and songs A and B are recorded on the optical disk 107. To do. Further, it is assumed that information indicating at what timing and for what period is displayed in synchronization with the audio data when the still image data A to D is reproduced as the management information.
[0078]
Here, the structure of the list generated by the list conversion means 109 is as shown in FIG. 6, which has been described in the fifth embodiment. The list conversion unit 109 generates the program reproduction list 701 and the synchronous program reproduction list 751 in FIG. 7 in addition to the list shown in FIG.
[0079]
The program playback list 701 is a list for describing the playback timing of still image data with respect to audio data.
[0080]
The program reproduction list 701 includes a list header 702 and first to third objects 703 to 705. Here, the first object to the first object 703 to 705 are directory objects, and have program reproduction lists A to C 711, 721, and 731, respectively, which are lower-level lists. A program playback list A 711, which is a list below the first object 702 of the program playback list 701, includes a list header 712 and a first object 713, and the first object 713 manages a still image A that represents the entire disc. A pointer to information, that is, a pointer 741 to the object 633 is described. The program playback list B 721 describes information of still images to be played back in synchronization with the second object 604 of the audio list 601, and includes a list header 722, a first object 723, and a second object 724. Here, it is assumed that management information described so that still images B and C are displayed at a certain timing with respect to the music piece A is recorded on the optical disc 107 as shown in FIG. In the first object 723 of the program reproduction list B721, a pointer to management information of the still image B, that is, a pointer 743 to the object 634 and reproduction timing information 744 of the still image B are described. The first object 724 of the program reproduction list B 721 describes a pointer to still picture C management information, that is, a pointer 745 to the object 635 and reproduction timing information 746 of the still picture C. The program playback list C731 describes still image information to be played back in synchronization with the third object 605 of the audio list 601, and includes a list header 732 and a first object 733. Here, it is assumed that management information described so that a still image D is displayed at a certain timing with respect to the music piece B is recorded on the optical disc 107 as shown in FIG. In the first object 733 of the program reproduction list C731, a pointer to the management information of the still picture C, that is, a pointer 747 to the object 636 and reproduction timing information 748 of the still picture C are described.
[0081]
The synchronized program reproduction list 751 is a list for indicating that audio data, still image data, and a text file are reproduced in synchronization. The synchronous program reproduction list 751 includes a list header 752, a first object 753, and a second object 754. A list header 752 designates a list number to be reproduced in synchronization. Here, since the audio list 601, the text file list 651, and the program reproduction list 701 are to be reproduced in synchronization, the numbers of these three lists are described in the list number 761. In the first object 753 and the second object 754, the numbers of the objects described in the three lists are designated. Since it is recorded on the disc so as to perform the reproduction as shown in FIG. 8A, the object number 2 is described in the first object 753 and the object number 3 is described in the second object 754.
[0082]
When a reproduction command is transmitted to the data transmission / reception device by designating the synchronous program reproduction list 751, the data transmission / reception device determines a list to be synchronously reproduced from the list header 752 of the synchronization program reproduction list 751, and stores each list in each list. Audio data, still image data, and lyrics files are reproduced as shown in FIG. 8A in the described order and reproduction timing.
[0083]
Further, when it is desired to change the reproduction timing of the still image data in FIG. 8A from an external device, the program reproduction list 701 is changed. For example, when the configuration of the program playback list is changed to the configuration shown in FIG. 9, the result of synchronous playback is as shown in FIG. Here, it is assumed that the reproduction timing information 944, 946, 948 has also been changed.
[0084]
Changes to the program playback list 701 are recorded on the optical disc 107, and the next time the optical disc 107 is played back, the program playback list of FIG. 9 is generated.
[0085]
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which a text file such as AV data, still image data, and lyrics for AV data is recorded via a digital interface, Express management information in a list structure. As the list structure, a list is generated for each piece of AV data, still image data management information, and text file management information, and a pointer to the list of related text file management information is described in the AV data list object. To do. The program playback list describes at what timing and during which period still image data is displayed during playback of AV data, and playback such that the AV data list, text file list, and program playback list are played back synchronously. When a command is received from an external device, AV data, still image data, and a text file are reproduced in synchronization. Further, when the reproduction timing of the still image described in the program reproduction list is changed from the external device, it is reflected in the management information of the recording medium.
[0086]
As described above, by using the data transmitting / receiving apparatus of the present invention, data such as AV data, still image data, and text file can be reproduced in synchronization with control from an external device, and the output timing of still image data, etc. Can also be controlled from external equipment.
[0087]
(Embodiment 7)
A sixth embodiment of the data transmitting / receiving apparatus of the present invention will be described with reference to FIGS. 1, 6, 7, and 10. FIG.
[0088]
FIG. 10A is a schematic diagram showing an outline of the list structure of the sixth embodiment. As described in the sixth embodiment, the synchronized playback method of audio data, still image data, and text files recorded on the optical disc 107 is the content list 271 and the audio list 601 that is a list in the lower layer. It is expressed by a still image list 631, a text file list 651, a program reproduction list 701, and a synchronous program reproduction list 751. When a reproduction command specifying the synchronous program reproduction list 751 is received from an external device, the synchronous reproduction described in these lists is started.
[0089]
Here, in addition to these lists, the list shown in FIG. 10B is generated. Since the detailed structure of these lists is the same as that described in the sixth embodiment, a description thereof will be omitted. The list in FIG. 10B is a list for describing user-defined playback methods, and the contents described in these lists are not recorded on the optical disc 107, but are temporary playback methods.
[0090]
The program reproduction list 1051 is a list having program reproduction lists 1052, 1053, and 1054 as a lower layer list. The program playback list 1052 is a list describing the user-defined playback order of audio data, the program playback list 1053 is a list describing the user-defined playback order of still image data, and the program playback list 1054 is a user of a text file. It is a list describing the playback order of definitions.
[0091]
The synchronous program reproduction list 1060 is a list for describing the synchronous relationship between the program reproduction lists 1052, 1053, and 1054. When a reproduction command specifying the synchronous program reproduction list 1060 is received from an external device, the synchronous reproduction described in these lists is started. By using the synchronized program reproduction list 1060, synchronized reproduction different from the reproduction method of FIG. 8 can be temporarily realized.
[0092]
Here, when the playback timing of still image data or the like is written to the program playback list 701 from an external device, it is reflected on the optical disc 107, and even when the playback timing of still image data or the like is written to the program playback list 1053 from an external device. It is not reflected on the optical disc 107. Therefore, information indicating whether the contents are reflected on the optical disc 107 when the list is rewritten is described in the list header of the program playback list or the synchronized program playback list.
[0093]
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which a text file such as AV data, still image data, and lyrics for AV data is recorded via a digital interface, Express management information in a list structure. As the list structure, a list is generated for each piece of AV data, still image data management information, and text file management information, and a pointer to the list of related text file management information is described in the AV data list object. To do. The program playback list describes at what timing and during which period still image data is displayed during playback of AV data, and playback such that the AV data list, text file list, and program playback list are played back synchronously. When a command is received from an external device, AV data, still image data, and a text file are reproduced in synchronization. Further, a list similar to these lists is generated as a user-defined list so that a user-defined synchronized playback method can be described. In the list describing the synchronous reproduction method recorded on the recording medium, information indicating that the change is reflected on the recording medium when the list is changed is described.
[0094]
As described above, by using the data transmitting / receiving apparatus of the present invention, data such as AV data, still image data, and text file can be reproduced in synchronization with control from an external device. Further, this synchronized reproduction can be performed by a temporary user-defined method. In addition, the list describing the synchronized playback method recorded on the recording medium describes information indicating that the change is reflected on the recording medium when the list is changed. It is possible to prevent the information on the recording medium from being changed by mistake by rewriting the list.
[0095]
In the embodiment of the present invention, the optical disk is described as an example of the recording medium. However, this is a magnetic disk, a magnetic tape, a semiconductor memory, etc. as long as it is a recording medium for recording data management information and management information. It does not matter.
[0096]
In the embodiment of the present invention, a recording medium that handles audio data as AV data content has been described. However, this may be a recording medium that handles video data or still images.
[0097]
In the embodiment of the present invention, the configuration has been described in which the management information held in the data holding unit 104 is converted into a list by the list conversion unit 109 when an external apparatus accesses the management information. Information may be held in the data holding unit 104 in a list structure.
[0098]
Further, in the embodiment of the present invention, text information and text files are given as examples of AV data management information, and these are shown in a list structure (title list 231 and text file list 235). Other management information may be used.
[0099]
In the embodiment of the present invention, a text file and an artist information file have been described as examples of text files, but these may be other types of text files.
[0100]
In the embodiment of the present invention, the audio list 201, the title list 231 and the text file list 251 have been described as a list below the content list 271, but this may be another structure. For example, there are cases where only the audio list 201 and the text file list 251 are lists below the content list 271 and the title list 231 is a list at the same level as the content list.
[0101]
In the embodiment of the present invention, both the attribute information of the lyrics file list and the attribute information of the artist information file are described in the object of the text file list. However, by using the directory object, for example, as shown in FIG. It may be expressed as an individual object. For example, FIG. 11 shows an example in which the objects 253 and 254 in the text file list 251 are directory objects compared to FIG. By using individual objects in this way, data reproduction output can be individually controlled.
[0102]
【The invention's effect】
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which AV data, text data such as a title for AV data, and text files such as lyrics for AV data are recorded via a digital interface. In addition, the management information of the recording medium is expressed by a list structure. As the list structure, a list is generated for each piece of AV data management information, text data, and text file management information, and the AV data list object has a pointer to a list of related text data and text file management information. Is described.
[0103]
As described above, in the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which AV data, text data such as a title for AV data, and text files such as lyrics for AV data are recorded via a digital interface. In addition, the management information of the recording medium is expressed by a list structure. As the list structure, a list is generated for each piece of AV data management information, text data, and text file management information, and the AV data list object has a pointer to a list of related text data and text file management information. Is described. At this time, if text data corresponding to AV data or the like is not recorded on the recording medium, an object in the list such as text data is left empty.
[0104]
In the data transmission / reception apparatus according to the present invention, when a recording medium on which AV data, text data such as titles for AV data, and text files such as lyrics for AV data are recorded via a digital interface is recorded. Media management information is expressed in a list structure. As the list structure, a list is generated for each piece of AV data management information, text data, and text file management information, and the AV data list object has a pointer to a list of related text data and text file management information. Is described. When the AV data is deleted, the object in the title list and the object in the text file linked from the object corresponding to the deleted AV data are also deleted at the same time.
[0105]
In the data transmission / reception apparatus according to the present invention, when a recording medium on which AV data, text data such as titles for AV data, and text files such as lyrics for AV data are recorded via a digital interface is recorded. Media management information is expressed in a list structure. As the list structure, a list is generated for each piece of AV data management information, text data, and text file management information, and the AV data list object has a pointer to a list of related text data and text file management information. Is described. When certain AV data is divided, the text data and text file management information corresponding to the newly generated AV data is added as a new object to the list of text data and text file management information. . Then, in the object corresponding to the newly generated AV data, the link information for the newly generated text data and the management information object of the text file is described.
[0106]
In the data transmission / reception apparatus of the present invention, when accessing a recording medium on which a text file such as AV data, still image data, and lyrics for AV data is recorded via a digital interface, the management information of the recording medium is stored. Expressed in a list structure. As the list structure, a list is generated for each piece of AV data, still image data management information, and text file management information, and the AV data list object contains a list of related text data and text file management information. Describes a pointer. When generating this list, a still image or text file representing the recording medium is described as the first object in the list. In addition, the management information of the entire disc is described in the first object in the AV data management information list. When a playback command specifying an AV data list is transmitted from an external device, the top object in the AV data list is ignored and playback is started from AV data corresponding to the second object.
[0107]
In the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which a text file such as AV data, still image data, and lyrics for the AV data is recorded via the digital interface, the management information of the recording medium is stored. Expressed in a list structure. As the list structure, a list is generated for each piece of AV data, still image data management information, and text file management information, and a pointer to the list of related text file management information is described in the AV data list object. To do. The program playback list describes at what timing and during which period still image data is displayed during playback of AV data, and playback such that the AV data list, text file list, and program playback list are played back synchronously. When a command is received from an external device, AV data, still image data, and a text file are reproduced in synchronization. Further, when the reproduction timing of the still image described in the program reproduction list is changed from the external device, it is reflected in the management information of the recording medium.
[0108]
In the data transmitting / receiving apparatus of the present invention, when accessing a recording medium on which a text file such as AV data, still image data, and lyrics for the AV data is recorded via the digital interface, the management information of the recording medium is stored. Expressed in a list structure. As the list structure, a list is generated for each piece of AV data, still image data management information, and text file management information, and a pointer to the list of related text file management information is described in the AV data list object. To do. The program playback list describes at what timing and during which period still image data is displayed during playback of AV data, and playback such that the AV data list, text file list, and program playback list are played back synchronously. When a command is received from an external device, AV data, still image data, and a text file are reproduced in synchronization. Further, a list similar to these lists is generated as a user-defined list so that a user-defined synchronized playback method can be described. In the list describing the synchronous reproduction method recorded on the recording medium, information indicating that the change is reflected on the recording medium when the list is changed is described.
[0109]
As described above, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file which is attribute data of AV data from an external device, it is accessed by following the link from the management information of AV data. be able to. In this case, since the text information and the text file are described in the same configuration, the external device can access the text information and the text file in the same procedure, and simplifies access from the external device. be able to.
[0110]
Further, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file as attribute data of AV data from an external device, it is possible to access by following a link from the management information of AV data. it can. In this case, since the text information and the text file are described in the same configuration, the external device can access the text information and the text file in the same procedure, and simplifies access from the external device. be able to. At this time, an empty object is generated even if text information such as a title is not recorded on the recording medium, so when an external device newly writes information such as a title, a writing position is set in advance. Can be kept.
[0111]
Further, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file as attribute data of AV data from an external device, it is possible to access by following a link from the management information of AV data. it can. In this case, since the text information and the text file are described in the same configuration, the external device can access the text information and the text file in the same procedure, and simplifies access from the external device. be able to. At this time, when the AV data is deleted, the object in the title list and the object in the text file linked from the object corresponding to the deleted AV data are also deleted at the same time. The management information and management information (text information and text file) corresponding to is not required to be deleted by the external device, and the list management can be unified. In addition, the contents recorded on the recording medium can be immediately reflected in the list.
[0112]
Further, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file as attribute data of AV data from an external device, it is possible to access by following a link from the management information of AV data. it can. In this case, since the text information and the text file are described in the same configuration, the external device can access the text information and the text file in the same procedure, and simplifies access from the external device. be able to. At this time, when certain AV data is divided, an object in the title list and an object in the text file are also generated for the AV data newly generated by the division, and the newly generated AV data is generated. Link from the object. Therefore, even when AV data recorded on the recording medium is divided by a command from the external device, management information and management information (text information and text file) corresponding to the newly generated AV data are generated from the external device. There is no need to generate a corresponding object, so that list management can be unified and processing can be simplified.
[0113]
Further, by using the data transmission / reception apparatus of the present invention, when accessing text information or text file as attribute data of AV data from an external device, it is possible to access by following a link from the management information of AV data. it can. In this case, since the management information of the entire recording medium and the still image and text file representing the recording medium are described as the top object of the list, the top of each list is always an object that represents the entire recording medium. Therefore, it is possible to unify the list structure and simplify access when accessing these data or management information of these data from an external device. Also, when a playback command specifying a list of AV data is transmitted from an external device, playback starts from the AV data corresponding to the second object, so playback is performed correctly in the order of the AV data recorded on the recording medium. It can be carried out.
[0114]
Further, by using the data transmitting / receiving apparatus of the present invention, data such as AV data, still image data, and text file can be reproduced in synchronization with control from an external device, and the output timing of the still image data is also external. It can be controlled from the equipment.
[0115]
Further, by using the data transmission / reception apparatus of the present invention, data such as AV data, still image data, and text file can be reproduced in synchronization with control from an external device. Further, this synchronized reproduction can be performed by a temporary user-defined method. In addition, the list describing the synchronized playback method recorded on the recording medium describes information indicating that the change is reflected in the recording medium when the list is changed. It is possible to prevent the information on the recording medium from being changed by mistake by rewriting the list.
[Brief description of the drawings]
FIG. 1 is a block diagram of a data transmission / reception apparatus for explaining an embodiment of the present invention.
FIG. 2 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 3 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 4 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 5 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 6 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 7 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 8 is a schematic diagram showing an example of synchronized playback for explaining the embodiment of the present invention;
FIG. 9 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 10 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 11 is a schematic diagram showing a list structure for explaining an embodiment of the present invention;
FIG. 12 is a schematic diagram showing a list structure for explaining a conventional example.
[Explanation of symbols]
101 Recording / reproduction signal processing means
103 System control means
104 Data holding means
105 Data transmission / reception means
108 Digital interface
109 List conversion means

Claims (4)

A data transmitting / receiving apparatus for transmitting / receiving data via a digital interface,
Data holding means for storing first management information which is management information of the first content group recorded in the recording medium and second management information which is management information of the second content group;
List conversion means for mutually converting the first and second management information and the list held by the data holding means;
Data transmission / reception means for transmitting / receiving the list to be converted by the list conversion means via the digital interface;
The list conversion means divides each of the first and second management information into objects that are units corresponding to one content,
Generating a first list including the first management information object group and a second list including the second management information object group;
Generating a third list describing the playback order and playback timing of the second content group during playback of the first content group ;
A data transmitting / receiving apparatus , wherein information indicating whether or not the change is reflected on the recording medium when the change is made to the third list from an external device is described in the third list . The list conversion means further generates a fourth list describing a user-defined playback order and playback timing of the second content group at the time of playback of the first content group,
The data transmission / reception according to claim 1, wherein information indicating whether or not the change is reflected on the recording medium when the change is made to the fourth list from an external device is described in the fourth list. apparatus. The list conversion means describes in the third list information indicating that the change is reflected in the recording medium when a change is made from the external device to the third list,
3. The data transmitting / receiving apparatus according to claim 2, wherein information indicating that the change is not reflected on the recording medium when the fourth list is changed from an external device is described in the fourth list . 4. The data transmitting / receiving apparatus according to claim 1, wherein the first content group is audio data, and the second content group is still image data .

Images