JPH11205411A - Data transmission / reception method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a data transmission / reception method that makes it easy for a user to manage rewritable information when managing management information and attribute information of data recorded on a recording medium in a list structure. SOLUTION: Management information of data recorded on an optical disk 107 is stored in a data holding unit 104 by distinguishing between rewritable management information and non-rewritable management information. When the user rewrites the management information, the data holding means 10
4 to access the rewritable information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for storing data recorded on a recording medium such as an optical disk, a magnetic tape, or the like.
The present invention relates to a data transmission / reception method for transmitting / receiving data via a digital interface such as 94.

[0002]

2. Description of the Related Art In recent years, the IEEE 1394 system has attracted attention as a serial data transmission system. IEEE13
The 94 system can be used not only in place of the transmission of computer data by the conventional SCSI system or the like, but also in the transmission of AV data. This is because the IEEE 1394 system defines two communication methods, asynchronous communication and isochronous communication. Isochronous communication is a data transmission method that can be used for transmitting data that requires real-time properties, such as AV data. In the isochronous communication, a band necessary for transmitting data is acquired before starting transmission. Then, data transmission is performed using the band. Thereby, the 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 properties, such as transmission of computer data. This can be considered as a method equivalent to a conventional transmission method such as the SCSI method.

[0003] Various methods have been proposed as transmission protocols on IEEE 1394, one of which is called an AV protocol. The AV protocol defines a method of transmitting and receiving AV data that requires real-time properties by isochronous communication, a method of transmitting and receiving a command to be given to a device by asynchronous communication, and the like.

On a compact disk (hereinafter referred to as CD) or a mini disk (hereinafter referred to as MD), management information of audio data is recorded in addition to actual audio data. This management information is recorded in the TOC area for a CD, and in the TOC area and the UTOC area for an MD. As the management information, information such as a start address and an end address of music data, a music title and a recording time are recorded. For the data such as the title of the music and the recording time, a method for transmitting the data is not specified in the above-mentioned AV protocol. Therefore, a method of holding specific information such as a song title and a recording time in a list structure as attribute information of a device, and a method of accessing the list from outside have been proposed.

[0005] An example of use of this method will be described with reference to FIG.
FIG. 5 is a schematic diagram showing the device 1000 and the device 1001 connected via the digital interface 1002. Now, it is assumed that the device 1000 has the CD 1004 mounted. Audio data and TOC information are recorded on the CD 1004. As TOC information,
If the CD 1004 is a CD that does not include text information, the number of recorded audio data, the total playback time, the playback time of each audio data, and the like are recorded, and the title of the disc and the title of the song are recorded. It has not been.

[0006] When loading the CD 1004, the device 1000 reproduces the number of music pieces of audio data recorded on the CD 1004, the total reproduction time, and the reproduction time of each audio data, and stores them in a memory as a list 1003. If the user wants to enter the title of the disc, the device 1
Input is performed by accessing the list 1003 via 001. When the CD 1004 is ejected, the title information input by the user cannot be recorded on the CD 1004, and therefore is recorded on the nonvolatile memory unit 1005 in the device 1000. When the CD 1004 is loaded again, a list 1003 is created based on the TOC information of the CD 1004 and the title information recorded in the nonvolatile memory unit 1005. The device 1001 is a CD10
In the case of obtaining the playback time, title information, etc. of the device 04, the information can be obtained by accessing the list 1003 in the device 1000 from the device 1001.

[0007]

However, according to the above-mentioned conventional method, the user can obtain the list 1 via the device 1001.
When writing the title of the disc in 003, first the entire list 1003 is
02, the list is updated by adding a disc title to the read list, and the updated list is not overwritten on the list 1003 of the device 1000 again via the digital interface 1002. No. Therefore, when the data amount of the list 1003 is large, or when the amount of data that can be transmitted at one time through the digital interface 1002 is small, when the list 1003 is transmitted between the device 1000 and the device 1001, transactions are performed many times. And the operation takes a very long time.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problem. When a user inputs title information or the like not originally recorded on a disc through a digital interface, the processing can be completed in a short operation time. An object of the present invention is to provide a data transmission / reception method that can perform the data transmission.

[0009]

According to one aspect of the present invention, there is provided a data transmitting / receiving method for transmitting / receiving data via a digital interface. The data transmitting / receiving method includes the steps of: A system control unit that reads management information of data recorded on the recording medium from the recording medium, a data holding unit that stores the management information read from the recording medium by the system control unit, and a data holding unit. Data transmitting / receiving means for transmitting / receiving the held management information to / from the digital interface, wherein the data holding means holds the management information by distinguishing between rewritable management information and non-rewritable management information. It has a configuration.

A data transmitting / receiving method according to the present invention is a data transmitting / receiving method for transmitting / receiving data via a digital interface, wherein a recording medium on which data is recorded, and management information of the data recorded on the recording medium are stored in the data transmitting / receiving method. System control means for reading from a recording medium, data holding means for storing the management information read from the recording medium by the system control means, and transmission and reception of the management information held by the data holding means to and from the digital interface Comprising a data transmitting and receiving means, the data holding means distinguishably holds the management information rewritable management information and non-rewritable management information, and when the data transmitting and receiving means receives a command to write the management information, The system control unit is configured to transmit the frame received by the data transmission / reception unit. It is provided with a configuration to output to the digital interface the response denying the command from the data transmitting and receiving means when the management information specified is not possible management information rewritten by de.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a data transmission / reception method according to the present invention will be described with reference to the drawings. FIG.
Are the reproduction signal processing means 101 and the system control means 10
3, data holding means 104, data transmitting / receiving means 105,
FIG. 2 is a block diagram of a data transmission / reception device including an optical head 106 and an optical disk 107.

Here, it is assumed that the optical disk 107 is a CD on which no text information is recorded. The operation of the data transmitting / receiving device of FIG. 1 will be described. The data transmission / reception device of FIG. 1 reproduces data in the TOC area when the optical disk 107 is loaded. The reproduced data is subjected to processing such as demodulation and ECC decoding by the reproduction signal processing means 101, and is input to the system control means 103. Data obtained from the TOC information input to the system control unit 103 is input to the data holding unit 104 and held by the data holding unit 104. Here, since the optical disk 107 is a CD on which no text information is recorded, the TOC
Data obtained from the information is the total playback time of the disc, the number of songs, and the playback time of the songs. The system control means is 1
03 denotes a non-volatile memory means 109 to an optical disc 107
Read the data corresponding to. For example, by recording the TOC pattern of a CD and the data related to the disc in the nonvolatile memory means 109, data corresponding to the optical disc 107 can be read from the nonvolatile memory means 109 using the TOC pattern as a key. Here, the non-volatile memory means 109 stores the optical disc 1
It is assumed that data corresponding to 07 is not recorded.

FIG. 2A shows data held in the data holding means 104 in this state. In FIG. 2A, a list A201 shows data obtained from the optical disk 107 and which cannot be rewritten by the user. The list B202 is data read from the non-volatile memory means 109, and shows data that can be rewritten by the user. FIG. 2 (a)
In FIG. 7, the hatched portion indicates that valid data is held at this point. In other words, the portions that are not shaded only indicate data holding positions, and indicate that valid data is not held.

Here, the digital interface 10
8 allows the user to connect to another device (hereinafter referred to as device B).
From the data transmission / reception device of FIG. 1 (hereinafter referred to as device A)
Of the title of the optical disc 107 is input. In this case, the device B sends a list B202 to the device A.
Issue a read command. The read command issued by the device B is input to the data transmission unit 105 of the device A via the digital interface 108. The data transmission / reception unit 105 passes the received command to the system control unit 103. When the system control means 103 knows that the received command is a command for reading the list B, it reads the data of the list B from the data holding means 104 and outputs it to the data transmitting / receiving means 105. The data transmission / reception unit 105 packetizes the data of the list B received from the system control unit 103 and transmits the packet to the device B via the digital interface 108.

The device B updates the list by inserting the title of the disc input by the user into the title 215 of the disc with respect to the data of the list B transmitted from the device A. And the digital interface 10
8 and a command to write the updated list as the list B of the device A is sent.

The write command from the device B and the updated list data are transmitted to the data transmitting means 10 of the device A.
5 is input. The data transmission / reception unit 105 passes the received command and data to the system control unit 103. When the system control unit 103 knows that the received command is a command for overwriting the updated data on the list B, the system control unit 103 writes the data transmitted from the device B as the list B into the data holding unit 104. As a result, the new list is overwritten on the position of the list B of the data holding unit 104 of the device A.

When the user sets the title of the song a, the title of the song b, and the title of the song c, the same procedure as in the case of inserting the disc title as described above can be performed. As a result, the list held in the data holding unit 104 is as shown in FIG.

Next, consider the case where the optical disk 107 is ejected when the list held in the data holding means 104 is in the state shown in FIG. 2B. This is for example
This occurs when the user presses the eject button of the device A or when the device B sends a command to the device A to eject the optical disc 107. In this case, the system control unit 103 reads the contents of the list B 202 held in the data holding unit 104 and writes the contents in the nonvolatile memory unit 109. Also, the nonvolatile memory means 10
9 to write the data of the list to the optical disk 1
07 is written with a unique pattern as a key. As a key, a TOC pattern or the like can be used. When the writing of the list data to the nonvolatile memory unit 109 is completed, the system control unit 103 ejects the optical disk 107.

When a command to write data is transmitted from the device B, the system control means 103
Is compared with the amount of data to be recorded in the non-volatile memory means 109 by comparing the capacity of the non-volatile memory means 109 with the amount of data to be recorded in the non-volatile memory means 109. , And instructs the data transmitting / receiving means 105 to transmit a response rejecting the command from the device B. As a result, the data transmission / reception unit 105 transmits a command rejection for the device B to the device B via the digital interface 108.

When a command to write data is transmitted from the device B, the system control means 103
Determines whether the item of the list that the device B tried to write is an item supported by the device A. If the item on the list to be written from the device B is not supported by the device A, the data transmission / reception unit 105 is instructed to transmit a response rejecting the command from the device B. As a result, the data transmission / reception unit 105 transmits a command rejection for the device B to the device B via the digital interface 108. For example, if device A only supports the contents of the list shown in FIG.
When the device B attempts to write the artist name of the disc in the list, the device A sends a rejection response to the device B.

As described above, the data transmitting / receiving apparatus of the present invention holds the management information of the data recorded on the optical disk 107 in a list structure. Then, by accessing this list from an external device via a digital interface, access to management information and attribute information of data recorded on the optical disk 107 is realized. At this time, by generating a list by separating the information that cannot be rewritten by the user and the information that can be rewritten by the user, when the user rewrites the list, the user accesses only the rewritable list. . Also, if the user tries to write a list beyond the capacity that the device can record, or if the user tries to write management information that the device does not support,
It returns a rejection response to the write. This makes it possible to greatly reduce the amount of transmission data and the amount of processing as compared with the conventional case where the user rewrites the generated list regardless of whether the list can be rewritten. In addition, when the user accesses the list, the data transmission / reception device can easily manage whether or not the items in the list can be rewritten.

Next, a second embodiment of the data transmitting / receiving apparatus of the present invention will be described with reference to FIG. FIG.
Recording / reproducing signal processing means 301, system control means 10
3, data holding means 104, data transmitting / receiving means 105,
FIG. 2 is a block diagram of a data transmission / reception device including an optical head 106 and an optical disk 302.

Here, the case where the optical disk 107 is a rewritable mini disk (MD) will be described. The operation of the data transmitting / receiving device of FIG. 3 will be described. When the optical disc 302 is loaded, the data transmitting / receiving apparatus of FIG.
The data in the OC and UTOC areas is reproduced. The reproduced data is demodulated by the recording / reproducing signal processing means 301,
After being subjected to processing such as CC decoding, the system control means 103
Is input to T input to the system control means 103
Data obtained from the OC information is stored in the data holding unit 104.
And is held by the data holding unit 104. Here, it is assumed that the optical disk 107 is a rewritable MD, and audio data and the title of the disk have already been recorded by the user. The data obtained from the TOC information is the total playback time of the disc, the number of songs, the playback time of the songs, and the title of the disc. The system control means is 10
Reference numeral 3 reads data corresponding to the optical disk 302 from the nonvolatile memory means 109. For example, by recording the TOC pattern of the MD and the data related to the disc in the non-volatile memory 109, the data corresponding to the optical disc 302 can be read from the non-volatile memory 109 using the TOC pattern as a key. Here, the non-volatile memory means 109 includes the optical disc 30
It is assumed that data corresponding to No. 2 is not recorded.

FIG. 4A shows the data held in the data holding means 104 in this state. Here, the data held in the data holding means 104 is a rewritable MD.
Are all data rewritable by the user. Therefore, FIG.
In list B401, data that can be rewritten by the user with data obtained from the optical disc 302 is shown. The hatched portion in FIG. 4A indicates that valid data is held at this point. That is, the parts that are not shaded are
Only the data holding position is shown, indicating that valid data is not held.

Here, the digital interface 10
8 allows the user to connect to another device (hereinafter referred to as device B).
From the data transmission / reception device of FIG. 3 (hereinafter referred to as device A)
Input the artist name of the optical disc 302, the title of the song a and the title of the song b, and the artist name. The input method is the same as the method shown in the first embodiment. As a result, the list held in the data holding unit 104 is as shown in FIG.

Next, consider the case where the optical disk 302 is ejected when the list held in the data holding means 104 is in the state shown in FIG. 4B. In this case, the system control unit 103 reads the contents of the list B 401 a held in the data holding unit 104 and writes the contents on the optical disk 302 and the nonvolatile memory unit 109. Here, the total playback time 405, the title 406 of the disc, the number of songs 408, the title 410a of the song a, and the title 4 of the song b
Since 13a can be recorded on the MD, these are recorded on the optical disc 302. Further, since the area for recording in the MD is not allocated to the artist name 407a of the disc, the artist name 411a of the song a, and the artist name 414a of the song b, the nonvolatile memory means 109
Is written to. When writing the list data to the non-volatile memory means 109, a pattern unique to the optical disk 302 is written as a key. When the writing of the data of the list to the optical disc 302 and the nonvolatile memory means 109 is completed, the system control means 103 ejects the optical disc 302.

As described above, the data transmitting / receiving apparatus of the present invention holds the management information of the data recorded on the optical disk 302 in a list structure. Then, by accessing this list from an external device via a digital interface, access to management information and attribute information of data recorded on the optical disk 302 is realized. At this time, by generating a list by separating the information that cannot be rewritten by the user and the information that can be rewritten by the user, when the user rewrites the list, the user accesses only the rewritable list. . This makes it possible to greatly reduce the amount of transmission data and the amount of processing as compared with the conventional case where the user rewrites the generated list regardless of whether the list can be rewritten. In addition, when the user accesses the list, the data transmission / reception device can easily manage whether or not the items in the list can be rewritten.

In the embodiment of the present invention, an optical disk has been described as an example of a medium. However, if the medium is a medium for recording data management information and attribute information, a magnetic disk,
It may be a magnetic tape or the like.

In this embodiment, the optical disk is C
D, a rewritable MD has been described as an example.
An optical disk such as D may be used.

In the embodiment of the present invention, a disk for handling audio data such as a CD or MD has been described. However, this may be a disk for handling video data or still images.

In this embodiment, a case has been described in which the list is generated in the data holding means when the TOC information is reproduced from the optical disk. However, the list is generated when an external device accesses the list. Is also good.

In this embodiment, the case where the attribute information of the data is recorded in the non-volatile memory means has been described using the TOC pattern of the disk as the unique information of the disk, but this is done by using other unique information. Is also good.

In this embodiment, the information shown in FIGS. 2 and 4 has been described as an example of data management information and attribute information. However, other management information and attribute information may be included in the list. Examples of management information and attribute information include recording time, songwriter name, icon data, and the like.

In this embodiment, the case where the data management information and the attribute information are recorded in the optical disk or the non-volatile memory means in the apparatus when the optical disk is ejected has been described. May be recorded on the optical disc or in the nonvolatile memory means in the apparatus in a case other than the ejection, if necessary.

In this embodiment, the case where the data transmitting / receiving apparatus has the non-volatile memory means has been described. However, the non-volatile memory means need not be provided.

In this embodiment, a case has been described in which the writing by the user is refused in the first embodiment. However, it goes without saying that the same method can be used in the second embodiment. Absent.

[0037]

As described above, the data transmission / reception method of the present invention holds management information such as the time length and name of data recorded on an optical disc and attribute information in a list structure.
Then, by accessing this list from an external device via a digital interface, access to management information and attribute information of data recorded on the optical disc is realized. At this time, by generating a list by separating the information that cannot be rewritten by the user and the information that can be rewritten by the user, when the user rewrites the list, the user accesses only the rewritable list. . Also, the user may try to write a list beyond the capacity that the device can record,
If the user attempts to write management information not supported by the device, a rejection response is returned for the writing.

As a result, the amount of transmission data and the amount of processing can be greatly reduced as compared with the conventional case where the list of management information and attribute information generated regardless of whether the user can rewrite the information is rewritten. . In addition, when the user accesses the list, the data transmission / reception device can easily manage whether or not the items in the list can be rewritten.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a data transmission / reception device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a list structure according to an embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a data transmission / reception device according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a list structure according to an embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a conventional data transmission / reception device.

[Explanation of symbols]

 101 reproduction signal processing means 103 system control means 104 data holding means 105 data transmission / reception means 106 optical head 107, 302 optical disk 108, 1002 digital interface 109, 1005 nonvolatile memory means 301 recording / reproduction signal processing means 1000, 1001 equipment 1004 CD

Continuation of the front page (72) Inventor Hiroyuki Kaminaka 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (10)

[Claims] 1. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, wherein the data transmission / reception device manages a recording medium on which data is recorded and data recorded on the recording medium. System control means for reading information from the recording medium; data holding means for storing the management information read from the recording medium by the system control means; and the management information held in the data holding means to the digital interface. Data transmission / reception means for transmitting / receiving data to / from the information processing apparatus, wherein the data transmission / reception method distinguishes between the rewritable management information and the non-rewritable management information and holds the management information in the data holding means. How to send and receive data. 2. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, wherein the data transmission / reception device records a recording medium on which data is recorded and first management information of the data. A non-volatile memory means, a system control means for reading the first management information from the non-volatile memory means, and reading second management information of data recorded on the recording medium from the recording medium; Data holding means for storing the first and second management information read from the nonvolatile memory means and the recording medium by the system control means,
Data transmitting / receiving means for transmitting / receiving the first and second management information held by the data holding means to / from the digital interface, wherein the data transmitting / receiving method comprises: A data transmission / reception method, wherein rewritable management information and non-rewritable management information are distinguished and held in the data holding means. 3. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, the data transmission / reception device comprising: a recording medium on which data is recorded; and management information of the data recorded on the recording medium. System control means for reading out from the recording medium, data holding means for accumulating the management information read from the recording medium by the system control means, and the management information held in the data holding means for the digital interface. The data transmitting and receiving method, wherein the data transmitting and receiving method distinguishes between the rewritable management information and the non-rewritable management information and holds the management information in the data holding unit. Upon receiving a command to read the rewritable management information, Method of transmitting and receiving data and outputting to said data communication means to a predetermined format by reading the rewritable management information held in the over data holding means. 4. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, the data transmission / reception device comprising: a recording medium on which data is recorded; and management information of the data recorded on the recording medium. From the recording medium, data holding means for storing the management information read from the recording medium by the system control means, and the management information held in the data holding means to the digital interface. A data transmitting / receiving means for transmitting / receiving, wherein the data transmitting / receiving method distinguishes the rewritable management information from the non-rewritable management information and holds the management information in the data holding means. When a command to write rewritable management information is received, the data Data transmission and reception method characterized in that rewriting the rewritable management information held in the holding means to the information data transmitting and receiving means has received. 5. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, wherein the data transmission / reception device includes a recording medium on which data is recorded, and management information of the data recorded on the recording medium. From the recording medium, data holding means for storing the management information read from the recording medium by the system control means, and the management information held in the data holding means to the digital interface. A data transmitting / receiving means for transmitting / receiving, wherein the data transmitting / receiving method distinguishes the rewritable management information from the non-rewritable management information and holds the management information in the data holding means. The rewritable management information held in the holding unit is recorded on the recording medium. Data transmitting and receiving method comprising Rukoto. 6. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, wherein a recording medium on which data of the data transmission / reception device is recorded, and first management information of the data are recorded. A non-volatile memory means, a system control means for reading the first management information from the non-volatile memory means, and reading second management information of data recorded on the recording medium from the recording medium; Data holding means for storing the first and second management information read from the nonvolatile memory means and the recording medium by the system control means,
Data transmitting / receiving means for transmitting / receiving the first and second management information held by the data holding means to / from the digital interface, wherein the data transmitting / receiving method comprises: The rewritable management information and the non-rewritable management information are distinguished and held in the data holding unit, and the rewritable management information held in the data holding unit is stored in the recording medium and the non-volatile storage as necessary. A data transmission / reception method, wherein the data is recorded in a memory means. 7. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, wherein the data transmission / reception device manages a recording medium on which data is recorded and data recorded on the recording medium. System control means for reading information from the recording medium, data holding means for storing the management information read from the recording medium by the system control means, and the management information held in the data holding means to the digital interface. The data transmitting and receiving method, wherein the data transmitting and receiving method distinguishes between the rewritable management information and the non-rewritable management information and holds the management information in the data holding unit. When a command to write management information is received, the data transmitting / receiving means receives the command. Data transmission and reception method for causing output to the digital interface the response denying the command from the data transmitting and receiving means when the management information specified is not possible management information rewritten by said commands. 8. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, wherein the data transmission / reception device manages a recording medium on which data is recorded and data recorded on the recording medium. System control means for reading information from the recording medium, data holding means for storing the management information read from the recording medium by the system control means, and the management information held in the data holding means to the digital interface. The data transmitting and receiving method, wherein the data transmitting and receiving method distinguishes between the rewritable management information and the non-rewritable management information and holds the management information in the data holding unit. Upon receiving a command to write management information, the system control means When the management information specified by the command received by the data transmission / reception means is management information that cannot be recorded on the recording medium, a response rejecting the command is output from the data transmission / reception means to the digital interface. Data transmission and reception method. 9. A data transmission / reception method for a data transmission / reception device for transmitting / receiving data via a digital interface, the data transmission / reception device comprising: a recording medium on which data is recorded; and a first management information of the data. Non-volatile memory means being recorded, system control means for reading the first management information from the non-volatile memory means, and reading second management information of data recorded on the recording medium from the recording medium, Data holding means for storing the first and second management information read from the nonvolatile memory means and the recording medium by the system control means; and the first and second management information held by the data holding means. Data transmission / reception means for transmitting / receiving information to / from the digital interface; Retains the first and second management information in rewritable management information and non-rewritable management information in the data holding unit, and when the data transmitting / receiving unit receives a command to write management information, If the management information specified by the command received by the data transmission / reception means is management information that cannot be recorded on the recording medium or the non-volatile memory means, a response rejecting the command is sent from the data transmission / reception means to the digital device. A data transmission / reception method characterized by outputting the data to an interface. 10. The data is audio data, and the management information is a reproduction time of the audio data,
10. The data transmission / reception method according to claim 1, further comprising at least one of a recording date and time, a title, and an author name.