JP3859900B2 - Data transmitting / receiving apparatus and method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data transmission / reception apparatus and method, and more particularly to auxiliary information data recorded on a recording medium such as an optical disk or a magnetic tape via an interface with an external AV device, personal computer, or the like via a digital interface such as IEEE1394. TECHNICAL FIELD The present invention relates to a data processing system and method for performing data processing by transmitting and receiving data.
[0002]
[Prior art]
In recent years, the IEEE 1394 system has attracted attention as a data serial transmission system. The IEEE 1394 system can be used not only for transmission of computer data and the like by the conventional SCSI system, but also for transmission of AV data. This is because the IEEE 1394 system defines two packet communication methods, that is, asynchronous (asynchronous) communication and isochronous (synchronous) communication. Isochronous communication is a data transmission method that can be used for transmission of main data such as AV data that requires real-time performance. In this isochronous communication, a band necessary for transmitting data is secured in advance prior to the start of transmission, and data communication 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 auxiliary information data that does not require real-time performance such as computer data. This can be considered to be equivalent to a transmission method such as a conventional SCSI system, and is transmitted using idle time of isochronous communication, and is generally used for transmission of control commands and responses.
[0003]
Various schemes have been proposed as higher-level transmission protocols in the IEEE 1394 scheme, and one of them is called an AV protocol. The AV protocol is being standardized as the IEC61883 standard. A set of AV control commands and responses for AV equipment is defined, and AV data that requires real-time performance is transmitted and received by isochronous communication. A method and a method for transmitting and receiving a control command or the like given to the device by asynchronous communication are defined.
[0004]
Now, in AV data discs such as compact discs, minidiscs, and DVD video discs, auxiliary attribute information of AV data is recorded in addition to the actual data of AV data. As shown in FIG. 9, this attribute information is recorded in a TOC (table of contents) area on a compact disc, and in a TOC area and a UTOC area on a mini disc. As the attribute information, information such as AV data start address and end address, AV data title, recording time, and the like is recorded. The transmission method of such attribute data such as title and recording time is not defined in the AV protocol of the IEC61883 standard. Therefore, a method for holding and expressing specific auxiliary management information such as the title and recording time of AV data as device attribute information in a list structure and a method for accessing the list from the outside have been proposed.
[0005]
An example of use of a conventional data transmitting / receiving apparatus will be described with reference to FIG. FIG. 10 shows a schematic configuration of a device 1000 as a data transmission / reception device connected to an external device 1001 such as an external controller via a digital interface 1002. Now, a case will be described as an example where the device 1000 is equipped with an optical disc 1004 as a recording medium. On the optical disc 1004, AV data and AV data attribute information are recorded. The attribute information includes the number of recorded AV data (indicating the number of songs if the AV data is audio data), the total playback time, the playback time of each AV data, the disc title and AV data title (song name). ), Management information such as the artist name.
[0006]
When the optical disc 1004 is loaded, the device 1000 reproduces attribute information such as the number of pieces of AV data recorded on the optical disc 1004 (the number of pieces of music), the total reproduction time, the reproduction time of each AV data, the title, the artist name, and the like. , A first list (content list 1003), a second list (title list 1005), a third list (artist list 1006), and the like are held in the holding memory unit of the device 1000. The title list 1005 and the artist list 1006 are information in which frequently used titles and artist names are arranged as text information in separate lists. Reference to these text information lists is accessed by pointer information in the content list 1003, and an example of the reference procedure is indicated by an arrow from the content 1003 in FIG.
[0007]
In the figure, the content list 1003 describes pointer information for accessing the text information of the title list 1005 and the artist list 1006. For example, since the pointer 1010 to the title of the disc refers to the title a (1020), the title of the disc is the title a. Similarly, the title of the song A becomes the title a from the pointer 1012, and the titles of the songs B and C become the title b and the title c, respectively. Also, the artist name of the disc and the artist names of the songs A and B are artist a, and the artist name of the song C is artist b.
[0008]
When the user wants to input a disc title or artist name, for example, the content list 1003 is first accessed from the external controller 1001 via the interface 1002, and necessary pointer information is read out. A desired input is performed by accessing the title list 1005 and the artist list 1006 from the obtained pointer information. For example, when rewriting the title of the song B, first, the pointer 1014 to the title of the song B included in the content list 1003 is read. From this pointer information, it is known that the title of the song B is described as the title b at the second position (1021) of the title list 1005. Then, a new title of song B is written at the position of title b (1021). In this way, other titles and artist names can be input by the user as well.
[0009]
When the optical disc 1004 is ejected, the title and artist name information input by the user to the lists 1005 and 1006 are recorded in a predetermined area of the optical disc 1004. When the optical disc 1004 is loaded again into the apparatus, a content list 1003, a title list 1005, an artist list 1006, etc. are generated based on the attribute information recorded on the optical disc 1004. When the external device 1001 wants to obtain text information such as the playback time, title information, and artist name of the optical disc 1004, the content list 1003, title list 1005, artist list generated and held in the apparatus 1000 from the external device 1001. Such desired information can be obtained by accessing 1006 and the like.
[0010]
[Problems to be solved by the invention]
However, in the conventional method, when text information such as a title and artist name is to be obtained from the external controller 1001, pointer information described in the content list 1003 must first be read each time. For this reason, the number of accesses to each list increases, and the processing capability when inputting / outputting text information such as titles and artist names decreases.
[0011]
Further, when the number of AV data (number of songs) recorded on the optical disc 1004 is large, or when the text information further describes information other than the title and artist name, the pointer information increases accordingly, and the content The amount of information in the list 1003 increases.
[0012]
Further, when a title of a certain AV data is rewritten, if the title is also referred to by other AV data, if the title is rewritten, the title of the other AV data being referred to is also changed. It will be. For example, in the case where the title of the song A is rewritten in FIG. 10, if the title a (1020) is rewritten, the title of the disc referring to it is also changed. Therefore, in order to rewrite only the title of the song A without changing the title of the disc, an area for describing a new title is additionally created in the title list 1005, a new title is written in the area, and the title is referred to. In addition, complicated processing such as rewriting the pointer 1012 to the title of the song A in the content list 1003 is required. As described above, the conventional methods have many problems.
[0013]
The present invention solves the above-mentioned conventional problems, can access text information with a small number of accesses, minimizes the amount of information held in the content list, and easily performs text information change processing. An object of the present invention is to provide a data transmission / reception apparatus and method capable of performing the same.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the data transmitting / receiving apparatus according to the present invention receives the command from the external device via the digital interface, thereby transferring the auxiliary information data of the actual data recorded on the recording medium to the external device. A data transmission / reception apparatus that performs data processing by transmitting / receiving data, and includes auxiliary information holding means for holding the auxiliary information data, and list generation means for generating an auxiliary information list from the held auxiliary information data so as to be reversely converted The generated auxiliary information list includes a content list describing the content of the auxiliary information data, and a text data list describing attribute text data corresponding to the content of the auxiliary information data, The order of the attribute text data described in the text data list is recorded in the content list. Characterized in that it is the same as the sequence order of the corresponding contents are.
[0015]
In the above configuration, the auxiliary information list is assigned an access reference ID preset for each list, and the ID of the text data list is described in the content list.
[0016]
The data transmission / reception method of the present invention receives and transmits a command from an external device via a digital interface, and transmits / receives auxiliary information data of actual data recorded on a recording medium to / from the external device for data processing. A data transmission / reception method to be performed, the method comprising: holding the auxiliary information data; and generating an auxiliary information list from the held auxiliary information data so as to allow reverse conversion, the generated auxiliary information list Has a content list describing the content of the auxiliary information data and a text data list describing attribute text data corresponding to the content of the auxiliary information data, and the attribute text data described in the text data list The arrangement order is the arrangement of the corresponding contents described in the contents list. Characterized in that it is the same as the mechanism.
[0017]
With the above configuration, when the data transmission / reception method and data transmission / reception apparatus of the present invention perform data processing by transmitting / receiving data on a recording medium to / from an external device, for example, attribute text data of AV data content such as a title and an artist name When information is represented by a list structure, a list describing attribute text data information is generated in the same order as the order of arrangement of AV data contents described in the content list, and the ID of the attribute information list is described in the content list To do. Therefore, once the ID of the attribute information list described in the content list is read as the pointer information, it is not necessary to read the content list again by directly accessing the attribute information list. Read and write text data information.
[0018]
This is because the order of the contents described in the content list and the order of the attribute text data information described in the attribute information list corresponding to the contents are the same. As a result, it is not necessary to read the content list every time the attribute information is read or written, and the processing amount of the external device and the data transmitting / receiving device and the traffic on the digital interface can be reduced. Therefore, the text information can be accessed with a small number of accesses, the amount of information held in the content list is minimized, and the data transmission / reception process that allows the text information change process to be performed easily is possible.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a data transmitting / receiving apparatus and its control command in a data processing system of the present invention will be described below with reference to the drawings. In the present embodiment, for example, audio data is handled as actual data, and a case of a disk drive in which an optical disk is mounted as a recording medium will be described as an example.
[0020]
(Embodiment 1)
As shown in FIG. 1, a data transmission / reception apparatus 100 according to the present invention includes a recording / playback signal processing unit 101, an auxiliary data holding unit 102, a system control unit 103, a data transmission / reception unit 105, an optical head 106, and an optical disk mounted as a recording medium. 107 and a list conversion unit 109. The data transmitting / receiving apparatus 100 having such a configuration is interconnected with an external controller 200, a personal computer 300, and the like via a digital interface 108 such as IEEE1394, and performs transmission / reception processing of auxiliary information data by a control command. In addition, a list holding memory unit 110 for temporarily copying and reading contents in each list can be provided in processing for changing the arrangement order of audio data (songs) in each list, which will be described later.
[0021]
In the data transmitting / receiving apparatus 100 configured as described above, the list conversion unit 109 generates an auxiliary information list (201, 202, 203) to be described later from the auxiliary information data held in the auxiliary information data holding unit 102 in a mutually converted manner, The generated auxiliary information list can be converted back to auxiliary information data held in the data holding unit 102. The generated auxiliary information list includes a content list (201) indicating the order of the contents of the auxiliary information data, and a text data list (202, 203) indicating attribute text data of the contents of the auxiliary information data. Here, the arrangement order of the attribute text data described in the text data list (202, 203) is the same as the order of the corresponding contents described in the content list (201).
[0022]
The auxiliary information list (201, 202, 203) is assigned an access reference ID number preset for each list, and the content list (201) has an ID number of each text data list (202, 203). Is described as pointer information (210, 211).
[0023]
The operation of the data transmitting / receiving apparatus having the above configuration will be described below. Here, a case will be described as an example where audio data is recorded as actual data on the optical disc 107 and attribute information of the audio data is recorded as auxiliary management data. In the data transmitting / receiving apparatus 100 of FIG. 1, when the optical disc 107 is loaded, the attribute information data recorded on the disc is reproduced via the optical head 106, and the reproduced attribute information data is demodulated by the reproduction signal processing unit 101. Then, processing such as ECC decoding is performed and input to the system control unit 103. The attribute information data input to the system control unit 103 is input and held in the attribute information holding memory unit of the data holding unit 102. Here, the attribute information data held by the data holding unit 102 includes total disc playback time, disc title, number of audio data (number of songs), playback time of each song, title (song name), artist name, genre, etc. Data management information. In addition, a player name, a category name, and the like can be included as attribute information.
[0024]
Here, when the attribute information of the audio data of the optical disc 107 is input / output (written and read) from the external device via the digital interface 108, the attribute information input / output is generated by converting the attribute information into a list structure. The operation is described below by accessing (reading and writing) the attribute information list.
[0025]
When reading the attribute information of the audio data, first, a packet including a command (command) for reading the attribute information of the audio data recorded on the optical disc 107 is input to the data transmitting / receiving unit 105 from the external device via the digital interface 108. The data transmission / reception unit 105 analyzes the header of the received packet and inputs a command included in the packet to the system control unit 103. When receiving the read command, the system control unit 103 outputs the attribute information held in the attribute information holding unit 102 to the list conversion unit 109. Upon receiving the attribute information from the attribute information holding unit 102, the list conversion unit 109 converts the attribute 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 109 to the data transmission / reception unit 105, and the data transmission / reception unit 105 adds a header to the list to packetize the list, and the external device via the digital interface 108 Output to.
[0026]
When writing audio data attribute information, first, a packet including a command (command) for writing audio data attribute information is input from the external device to the data transmission / reception unit 105 via the digital interface 108. Reference numeral 105 analyzes the header of the received packet and inputs a command included in the packet to the system control unit 103. When the system control unit 103 receives the write command, the system control unit 103 executes the writing described in the command to the list held by the list conversion unit 109. This write command is also executed for the attribute information held in the attribute information holding unit 102. The written attribute information is read by the system control unit 103 when the optical disc 107 is ejected from the apparatus 100, and is recorded on the optical disc via the recording / reproducing signal processing unit 101.
[0027]
FIG. 2 shows an example of the structure of the entire list of attribute information generated by the list conversion unit 109, and includes a content list 201, a title list 202, and an artist list 203. Here, a case where audio data of, for example, three songs (song A, song B, song C) is recorded on the optical disc 107 is illustrated. As the pointer 200 to the content list, a predetermined ID code or the like for designating the content list 201 is assigned. The content list 201 is composed of the total playback time of the entire disc, a pointer 210 to the title list, a pointer 211 to the artist list, the number of songs 212, and playback times 213 to 215 of songs A, B, and C, respectively.
[0028]
In the content list 201, as the pointer information, the ID 210 of the title list 202 is described in the pointer 210 to the title list, and the ID of the artist list 203 is described in the pointer 211 to the artist list. In this embodiment, the ID of the title list 202 and the ID of the artist list 203 are described only in the content list 201. However, the attribute information list of the title list 202 and the artist list 203 is also a list of attribute information. The content list ID corresponding to can be described as pointer information.
[0029]
The title list 202 is a text database list, and includes a title 220 of the entire disc, the number of songs 221, and titles 222 to 224 of songs A, B, and C, respectively. Each song title has a data structure composed of, for example, a character code using 7 bits per character, a language code, text data, and an ID code added thereto. Here, the arrangement order of the titles described in the title list is the same as the order of the songs A, B, and C described in the content list 201. Similarly to the title list, the artist list 203 includes the artist name 230, the number of songs 231, and the artist names 232 to 234 of the songs A, B, and C on the entire disc. Here, the order of the artist names described in the artist list 203 is the same as the order of the songs A, B, and C described in the content list 201.
[0030]
For example, the operation when reading the title of the first song (song A) recorded on the optical disc 107 via the digital interface 108 from an external device will be described. The external device first reads the pointer 200 to the content list by the attribute information reading method described above. Then, the pointer 210 to the title list described in the content list 201 is read using the pointer 200 to the read content list. Subsequently, the title of the first song described in the title list 202 is read using the pointer 210 to the read title list. Here, since the order of the titles described in the title list is the same as the order of the songs A, B, and C described in the content list 201, the desired title can be obtained by accessing the title of the first song. The title of song A can be read.
[0031]
Thereafter, when reading the title of the song C, the ID of the title list 202 has already been read as the pointer 210 to the title list, so there is no need to read the content list 201 again. By reading the title 224 of the song, the title of the desired song C can be read.
[0032]
FIG. 3A shows an example of the data structure of a read command when reading the title of a song. The command includes a command name (READ) 31 and an ID of a list to be accessed (in this case, an ID of the title list). 32), a number 33 of attribute information (song) to be accessed, and a field 34 indicating the ID of text data. If it is now desired to read the title of the third song (Song C), the song number is “3”. Then, a response to the command is created using the acquired title, and therefore the response has a format in which the read attribute information is added to the command.
[0033]
According to the IEC61883 standard, the packet structure of a read command is represented by “READ INFO BLOCK” as the command name, and the address of the read destination is “info” block reference For example, when reading the title of the third song in the text database list, the ID of the text database list (title list), the ID indicating the third song, and the title text data are used. An ID indicating that there is a description is described, and the response has a configuration in which the read data is added to the command structure.
[0034]
Next, an operation when writing, for example, the artist name (230) of a disc recorded on the optical disc 107 via the digital interface 108 from an external device will be described. The external device first reads the pointer 200 to the content list, and reads the pointer 211 to the artist list described in the content list 201 using the read pointer 200 to the content list. Subsequently, a desired artist name is written in a location (230) corresponding to the artist name of the disc described in the artist list 203 using the pointer 211 to the read artist list. This attribute information writing operation is executed by the writing procedure as described above.
[0035]
Thereafter, when writing the artist name of the song B, for example, the ID of the artist list 203 has already been read as the pointer 211 to the artist list, so there is no need to read the content list 201 again, and the artist list 203 is directly read. The artist name of the desired song B can be written at the position of the artist name 233 of the second song.
[0036]
Here, as shown in FIG. 3B, the data structure of the write command includes the command name 35, the attribute information list ID 36 to be accessed, the song number 37, and the attribute information (text data) ID 38. Desired attribute information (text data) 39. Since the command is a write command, the command name is “write” (WRITE). For example, when the title of the second song is written, the song number is “2”, and a predetermined numeric number or the like is assigned as the ID of the attribute information (text).
[0037]
In the IEC61883 standard, the packet structure of a write command is assigned a field represented by “WRITE INFO BLOCK” as the command name, and the write destination address is “info”. block reference For example, when writing in the title position of the third song in the text database list, the ID of the text database list (title list), the ID indicating the third song, and the title text data Is written, and the data to be written is "replacement" info block Data "is described in the field. When text data is described, the content of the text data is described as, for example, an ASCII string. The response is" replacement "from the command packet. info block The data "field has no written data, and whether it is OK or NG is described in the response field in the upper header of this structure.
[0038]
As described above, the command of the present invention is a command that is issued to the data transmitting / receiving apparatus of the present invention, and indicates that the command is an access command to the ID number set for the data management attribute information list. It is a configuration having at least a field and a field indicating an arrangement order in the list of the data management attribute information.
[0039]
As described above, in the data processing system of this embodiment, when the attribute information of the AV data content such as the title and the artist name is represented by the list structure, the order of the songs described in the content list (in this embodiment, the song A , B, C playback time arrangement order), a list describing the attribute information in the same order as the order is generated, and the ID of the attribute information list is described as pointer information (210, 211) in the content list. Therefore, once the ID of the attribute information list described in the content list is read as the pointer information, it is not necessary to read the content list again by directly accessing the attribute information list. Can read and write information. This is because the order of the contents described in the content list (201) and the order of the contents described in the attribute information list (202, 203) are the same. As a result, it is not necessary to read the content list every time the attribute information is read and written, and the processing amount can be greatly reduced.
[0040]
Next, the operation when an instruction to change the arrangement order of the songs in the list is received from the external device via the digital interface 108 will be described with reference to FIG. In this song order switching process and the like, temporary copying and holding and reading of contents in each list are performed by processing control by the system control unit 103 using the list holding memory unit 110 shown in FIG. For example, when the order of the music B and the music C is switched, first, the order of the music B (214) and the music C (215) included in the content list 201 is switched in the list configuration shown in FIG. Then, the order of the song B (223) and the song C (224) in the title list 202 is changed, and similarly, the order of the song B (233) and the song C (234) in the artist list 203 is changed. As a result, the configuration of each list is as shown in FIG. Thereby, even when the arrangement order of the contents such as the music order is changed, it is guaranteed that the music order in the content list matches the order in the title list and the artist list. Note that the list holding memory unit 110 may be included in the list conversion unit 109. Based on the result of changing the arrangement order of the contents such as the music order, the arrangement order of the attribute auxiliary data recorded on the optical disc 107 is also changed when ejecting the disc.
[0041]
The operation when an instruction to delete a song in the list is received from the external device via the digital interface 108 will be described with reference to FIG. For example, when an instruction to delete the song B is received, first, in the list configuration shown in FIG. 2, the song B (214) included in the content list 201 is deleted, and the song B (223) in the title list 202 is deleted. Similarly, the song B (233) in the artist list 203 is deleted, and as a result, the structure of each list is as shown in FIG. With such an operation, even when a song is deleted, it is ensured that the order of songs in the content list matches the order in the title list and artist list. Based on the result of deleting the content of the song B, the attribute auxiliary data of the song B recorded on the optical disc 107 is also deleted when the disc is ejected.
[0042]
In the embodiment of the present invention, the case where a title list and an artist list are created separately as an example of a list of attribute information of data has been described. However, these lists may be integrated into one. An example in which the title list and artist list shown in FIG. 2 are integrated is shown in FIG. One attribute information list 501 is shown as an integrated list, and pointer information is also integrated as a pointer 500 to only one attribute information list. Further, the integration of the attribute information list can be similarly performed even when the types of attribute information are increased.
[0043]
(Embodiment 2)
Next, a data processing system according to the second embodiment of the present invention will be described. FIG. 7 shows a schematic configuration of a data processing system according to the second embodiment. As can be seen from the figure, the difference between the second embodiment and the first embodiment shown in FIG. 1 is that a second optical disk b (117) is further added to the data transmitting / receiving apparatus. Thus, one of the first optical disk a (107) and the second optical disk b (117) is selectively recorded and reproduced by a changer mechanism (not shown). Since the other basic configurations are the same, the description of overlapping parts is omitted here for simplicity.
[0044]
In this embodiment, it is assumed that the auxiliary data holding unit 102 holds the attribute management information of both the first optical disk a (107) and the second optical disk b (117). Therefore, the external device 200 can access the attribute information of both the first optical disc a (107) and the second optical disc b (117) via the digital interface. The method for accessing the attribute information is the same as the method described in the first embodiment.
[0045]
FIG. 8 shows the entire structure of the attribute information list generated by the list conversion unit 109 in the above configuration. In the figure, the entire list structure is a content list a (301), a title list a (302), an artist list a (303) corresponding to the first optical disc a (107), and a second optical disc b (117). Content list b (401), title list b (402), and artist list b (403). Here, audio data for three songs A, B, and C is recorded on the first optical disc a (107), and two songs D and E are recorded on the second optical disc b (117). Audio data is recorded.
[0046]
The content list a (301) includes the total playback time of the disc, the pointer to the title list a (310), the pointer to the artist list a (311), the number of songs (312), and the playback times of the songs A, B, and C. (313, 314, 315). The content list b (401) includes the total playback time of the disc, the pointer to the title list b (410), the pointer to the artist list b (411), the number of songs (412), and the playback times of the songs D and E (413). 414).
[0047]
The ID of the title list a (302) is described as the pointer information (310) to the title list a, and the ID of the artist list a (303) is described as the pointer information (311) to the artist list a. Yes. Similarly, the ID of the title list b (402) is described as the pointer information (410) to the title list b, and the ID of the artist list b (403) is described as the pointer information (411) to the artist list b. is described.
[0048]
The title list a (302) describes the pointer (319) to the content list a, the title (320) of the disc a, the number of songs (321), and the titles (322, 323, 324) of the songs A, B, and C, respectively. Has been. Here, as the pointer information (319) to the content list a, the ID of the content list a (301) is described, and the order of the titles described in the title list a (302) is the content list a (301). 301) is the same as the order of the music described in 301). The artist list a (303) includes a pointer (329) to the content list a, the artist name (330) of the disc a, the number of songs (331), and the artist names (332, 333) of the songs A, B, and C, respectively. 334). Here, as the pointer information (329) to the content list a, the ID of the content list a (301) is described, and the order of the artist names described in the artist list a (303) is the content list. The order of the music described in a (301) is the same.
[0049]
The content list b (401), the title list b (402), and the artist list b (403) corresponding to the second optical disc b are respectively configured as a content list a (301) and a content list a (301) corresponding to the first optical disc a. The configuration is the same as that of the title list a (302) and the artist list a (303).
[0050]
The method for reading and writing the title and artist name of the content of the attribute information recorded on the optical disc a or the optical disc b via the digital interface 108 from the external device is the same as in the first embodiment.
[0051]
Consider a case where the title list a (302) and the title list b (402) are searched and a song having a title including a certain character string is selected. In this case, the external device reads the title list a (302) and the title list b (402) via the digital interface 108. Then, a search is performed for a desired character string in the read title list, and a title including the desired character string is found. For example, when the title including the desired character string is the title (422) of the song D, the song D is included from the pointer (419) to the content list b included in the read title list b (402). Since it can be seen that the content list is the content list b (401) and the first song, the song D can be selected.
[0052]
In the second embodiment of the present invention, the case where the number of optical disks to be mounted is two has been described, but a configuration in which an arbitrary plurality of optical disks are mounted is also possible. Further, the example in which the data transmitting / receiving apparatus has a plurality of content lists has been described as having a changer configuration, but the content list may have a hierarchical structure. Even when only one content list is provided, a pointer to the content list corresponding to the attribute information may be described in the attribute information list.
[0053]
As described above, in the present invention, when content attribute information such as titles and artist names is represented by a list structure, a list in which attribute information is described in the same order as the order of songs described in the content list is generated. Then, the ID of each attribute information list is described as pointer information in the content list. In the attribute information list, the content list ID corresponding to the attribute information list is described as pointer information. Therefore, once the ID of the attribute information list described in the content list is read, the attribute information can be read and written by directly accessing the attribute information list thereafter. This is because the order of the contents described in the content list and the order of the corresponding contents described in the attribute information list are the same.
[0054]
Thereby, it is not necessary to read the content list every time the attribute information is read and written, and the processing amount can be reduced. In addition, when a character string is searched for a list of attribute information and attribute information matching the search is found, it is possible to easily know which content list includes content having the attribute information. This is because the ID of the content list corresponding to the attribute information list is described in the attribute information list, and the order of the contents described in the content list is the same as the order of the contents described in the attribute information list. Because.
[0055]
In the embodiment of the present invention, the optical disk is described as an example of the recording medium. However, the present invention is not limited to this, and any medium that records data management information and attribute information may be a magnetic disk, It may be a magnetic tape or the like.
[0056]
In the embodiments of the present invention, the optical disk 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.
[0057]
In the embodiment of the present invention, the configuration has been described in which attribute information held in the data holding unit 102 is converted into a list by the list conversion unit 109 when an external apparatus accesses the attribute information. May be held in the attribute information holding unit 102 in a list structure. With this configuration, the function of the list conversion unit 109 is included in the data holding unit 102.
[0058]
In the embodiment of the present invention, text information such as a title and an artist name has been described as an example of data attribute information as shown in FIGS. 2 and 8, but other attribute information may be included in the list. . Examples of other attribute information include a songwriter name, a composer name, icon data, and the like.
[0059]
In the embodiment of the present invention, the case where a title list and an artist list are created separately as an example of a list of attribute information of data has been described. However, these lists may be integrated into one. Of course, the same can be said even when the types of attribute information increase.
[0060]
In the embodiment of the present invention, an example in which the reproduction time of a song is described in the content list has been described. However, another item such as the remaining amount of the disc may be described in the content list.
[0061]
【The invention's effect】
As described above, in the present invention, when content attribute information such as titles and artist names is represented by a list structure, a list in which attribute information is described in the same order as the order of songs described in the content list is generated. Then, the ID of the attribute information list is described as pointer information in the content list. In the attribute information list, the ID of the content list corresponding to the attribute information list is described as pointer information.
[0062]
Therefore, if the ID of the attribute information list described in the content list is read, the attribute information can be read and written by directly accessing the attribute information list thereafter. This is because the order of the contents described in the content list and the order of the contents described in the attribute information list are the same. Therefore, it is not necessary to read the content list every time the attribute information is read and written, and the processing amount can be greatly reduced.
[0063]
In addition, when a character string is searched for a list of attribute information and attribute information matching the search is found, it is possible to easily know which content list includes content having the attribute information. This is because the ID of the content list corresponding to the attribute information list is described as pointer information in the attribute information list, and the order of the contents described in the content list and the order of the contents described in the attribute information list are By being the same.
[Brief description of the drawings]
FIG. 1 is a block diagram of a data processing system for explaining a first embodiment of the present invention.
FIG. 2 is a schematic diagram showing an attribute information list structure according to the first embodiment of this invention.
FIG. 3 is a schematic diagram showing the structure of read and write commands according to the first embodiment of the present invention.
The schematic diagram which shows the example of an arrangement | sequence of the list structure of the Example of this invention
FIG. 4 is a schematic diagram showing arrangement replacement of the attribute information list according to the present invention.
FIG. 5 is a schematic diagram showing attribute information deletion in the attribute information list of the present invention.
The schematic diagram which shows the command and response structure of the Example of this invention
FIG. 6 is a schematic diagram showing integration of attribute information lists according to the present invention.
FIG. 7 is a block diagram of a data processing system for explaining a second embodiment of the present invention.
FIG. 8 is a schematic diagram showing an attribute information list structure according to the second embodiment of the present invention.
The block diagram which shows the structure of the command transmitted on IEEE1394
FIG. 9 is a schematic diagram showing a data recording area on a conventional disc.
Configuration diagram showing the structure of the command frame of FIG.
FIG. 10 is a schematic diagram showing a list structure of a conventional data transmitting / receiving apparatus.
[Explanation of symbols]
101 Recording / playback signal processing unit 102 Auxiliary data holding unit
103 System control unit 105 Data transmission / reception unit
108 Digital interface 109 List converter
201 Content list 202 Title list
203 Artist List

Claims (18)

In a data transmission / reception device that performs data processing by transmitting / receiving auxiliary information data of actual data recorded on a recording medium to / from an external device by receiving a command from the external device via a digital interface,
Auxiliary information holding means for holding the auxiliary information data;
A list generation means for generating an auxiliary information list from the held auxiliary information data so as to be reverse-transformable;
The generated auxiliary information list has a content list describing the contents of the auxiliary information data and a text data list describing attribute text data corresponding to the contents of the auxiliary information data, and is described in the text data list. The data transmission / reception apparatus according to claim 1, wherein the attribute text data is arranged in the same order as the corresponding contents described in the content list.   2. The apparatus according to claim 1, wherein the auxiliary information list is assigned an access reference ID preset for each list, and the ID of the text data list is described in the content list.   3. The apparatus according to claim 2, wherein an ID of the content list is described in the text data list.   2. The apparatus according to claim 1, further comprising data transmission / reception means for transmitting / receiving the auxiliary information list and command via the digital interface.   The apparatus according to claim 1, wherein the actual data recorded on the recording medium is one of audio data, video data, and still image data.   The apparatus includes a list holding memory for temporarily storing and reading out contents in each list for the processing of changing the arrangement order of the auxiliary information data described in the auxiliary information list generated by the list generating means The apparatus of claim 1 comprising means.   In order to change the arrangement order of the auxiliary information data in the auxiliary information list by the list holding memory means, first, after changing the arrangement order of the desired content described in the content list, each text corresponding to the content The apparatus according to claim 6, wherein the arrangement order of the attribute text data described in the data list is changed.   The auxiliary information data described in the auxiliary information list generated by the list generating means is deleted first after the desired content described in the content list is deleted, and then each text data list corresponding to the content The apparatus according to claim 1, wherein the attribute text data described in (1) is deleted. The command is a command for accessing auxiliary information, and the command includes a field indicating an ID of the auxiliary information list to be accessed and a field indicating an arrangement order of desired auxiliary information to be accessed, and a desired information to be accessed 3. The apparatus according to claim 2, wherein the position of the auxiliary information is known and the position of the corresponding desired auxiliary information in the created list is accessed.   2. The apparatus according to claim 1, wherein the digital interface is an IEEE 1394 serial transmission system and uses an AV control command defined in the IEC61883 standard as an upper transmission protocol. In a data transmission / reception method for performing data processing by transmitting / receiving auxiliary information data of actual data recorded on a recording medium to / from an external device by receiving a command from the external device via a digital interface,
Holding the auxiliary information data;
Generating an auxiliary information list from the held auxiliary information data so as to be reversely converted,
The generated auxiliary information list has a content list describing the contents of the auxiliary information data and a text data list describing attribute text data corresponding to the contents of the auxiliary information data, and is described in the text data list. A data transmitting / receiving method, wherein the attribute text data is arranged in the same order as the corresponding contents described in the content list.   12. The method according to claim 11, wherein the auxiliary information list is assigned an access reference ID preset for each list, and the ID of the text data list is described in the content list.   13. The method according to claim 12, wherein an ID of the content list is described in the text data list.   The method according to claim 11, further comprising a step of transmitting and receiving the auxiliary information list generated in the list generation step via the digital interface.   A step of changing the order of arrangement of desired auxiliary information data in each list by temporarily sucking and holding and reading the contents in each list of auxiliary information data described in the auxiliary information list generated in the list generation step 12. The method of claim 11, comprising:   In order to change the arrangement order of the auxiliary information data in the auxiliary information list, first, the arrangement order of the desired content described in the content list is changed, and then described in each text data list corresponding to the content. The method according to claim 15, wherein the arrangement order of the attribute text data is changed.   In order to delete auxiliary information data described in the auxiliary information list generated in the list generation step, first, a desired content described in the content list is deleted, and then each text data list corresponding to the content is deleted. 12. The method according to claim 11, wherein the attribute text data described is deleted. The command is a command for accessing auxiliary information, and the command has a field indicating an ID of the auxiliary information list to be accessed and a field indicating an arrangement order of desired auxiliary information to be accessed, and a desired information to be accessed 13. The method according to claim 12, wherein the position of auxiliary information is known and the position of the corresponding desired auxiliary information in the created list is accessed.

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