CN1309361A - Apparatus having configuration read-only memory storing format informations - Google Patents

Abstract

An electronic device includes a configuration ROM for storing information regarding its functions as keywords, which can be directly accessed from other electronic devices. Information regarding subunits existing within the electronic device (unit) are also stored in this configuration ROM as keywords. The information regarding the subunits includes information indicative of data formats that can be handled by the subunits, information indicative of types of subunits, and the like. Since the information regarding the subunits is stored in the configuration ROM which can be directly accessed from another electronic device, even if the other electronic device operates in accordance with a different protocol, the other electronic device can easily obtain the information regarding the subunits from the configuration ROM.

Description

Equipment with configuration read-only memory of storing format informations

The present invention relates to be used on video equipment, the audio frequency apparatus etc., can be according to specific protocol, " the electronic equipment that audio/video control (" AV/C ") is operated for example.Specifically, the present invention relates to comprise can be by the electronic equipment of the storer of other electronic equipment direct access, this electronic equipment has been stored the information of relevant subelement, even under its situation of operating according to different agreements, this information also can be obtained easily by other electronic equipment.

A plurality of electronic equipments according to the different agreement operation can pass through common bus, for example IEEE (Institute of Electrical and Electric Engineers) 1394 bus interconnections.

The electronic equipment (unit), for example video recorder that play IEEE 1394 node effects can comprise a configuration read-only memory (" ROM ") of some subelements and the various information of wherein having stored relevant these subelements.Other electronic equipment can directly carry out access to this configuration ROM by IEEE 1394 buses.

But, carrying out the comprising of apparatus operating about the information in the information configuration ROM of each subelement and inconsistent according to the different agreement apparatus operating according to specific protocol, for example AV/C agreement.Particularly, relevant with the specific protocol (AV/C) of the equipment interior information of configuration ROM can not be carried out access by the miscellaneous equipment according to the different agreement operation.

If above-mentioned configuration ROM is carried out direct access, just need to relate to the information of the operating protocol of electronic equipment, the information of relevant subelement for example more, can may be that other electronic equipment according to different agreement is operated carries out access.

Therefore, the purpose of this invention is to provide a kind of like this electronic equipment, the information of one (some) subelements of wherein relevant this equipment can be easily by or even obtain according to other electronic equipment of different agreement operation.Some will be conspicuous for other purpose of the present invention and advantage, and some can be found out from instructions and accompanying drawing.

Electronic equipment of the present invention comprises that a memory storage is used for the function of relevant himself electronic equipment is stored as key word, and this memory storage can be by other electronic equipment direct access; With at least one subelement, wherein storage arrangement is stored the information of relevant this subelement as key word.

The present invention can comprise the memory storage that the function of relevant its oneself electronic equipment is stored as key word, and this memory storage can be by other electronic equipment direct access.If its oneself electronic equipment is IEEE 1394 nodes, then memory storage for example can be a configuration ROM.Memory storage can be stored the information of a relevant subelement in this electronic equipment (or " unit ") as key word.The information of relevant this subelement can comprise the information etc. of type of information, expression one subelement of the form of the data that expression can be handled by a subelement.

Because the information of relevant this subelement is used as that key word is stored in can be by in the memory storage of other electronic equipment direct access, even so under the situation that this other electronic equipment is operated according to different agreement, this other electronic equipment also can easily be read the information of relevant this subelement from above-mentioned memory storage.

In addition, electronic equipment of the present invention can further comprise with minimum ASC II (ASCII) form and stored the memory storage of dealer or model name.So minimum ASC II just can easily show dealer or model name to its effective electronic equipment.

For better understanding the present invention, referring to following explanation and accompanying drawing, wherein:

Fig. 1 is the block scheme that expression utilizes the network system of IEEE 1394 interconnection;

Fig. 2 represents to utilize the periodic structure of the transmission data of the equipment that IEEE 1394 systems connect;

Fig. 3 is the diagram of the address space structure of expression CSR framework;

Fig. 4 represents the structure of PCR;

Fig. 5 (A) represents the structure of oMPR, oPCR, iMPR and iPCR respectively to 5 (D);

Fig. 6 represents the relation between plug (plug), plug control register and the synchronizing channel;

Fig. 7 represents the relation between control command and its response;

Relation between the order of the detailed presentation graphs 7 of Fig. 8 and the response;

Fig. 9 represents the example of pack arrangement of the synchronous driving bag of one embodiment of the invention;

Figure 10 represents the example of pack arrangement of the asynchronous communication bag of one embodiment of the invention;

Figure 11 is the diagram of the data structure of expression configuration ROM;

Figure 12 is the diagram of the data structure of expression bus message piece;

Figure 13 is the diagram of the type of the expression subelement that is used as key word storage;

Figure 14 is the diagram of the corresponding relation between expression subelement and the key word;

Figure 15 is the diagram of the corresponding relation between expression data layout and the key word;

But Figure 16 is the diagram that the format information of the data of expression quilt cell processing is used as an example of key word storage;

Below referring to accompanying drawing one embodiment of the invention are described:

Fig. 1 represents that wherein a plurality of nodes utilize a network system of IEEE 1394 buses 20 interconnection.In network system shown in Figure 1, integrated receiver demoder (" IRD ") 10 is connected with IEEE 1394 buses 20 with video recorder (video deck) 100.IRD 10 and video recorder 100 can be respectively IEEE 1394 nodes.Receiving antenna 30 is connected with IRD 10 with monitor 40.Receiving antenna 30 also is connected with video recorder 100.

As mentioned above, video recorder 100 is IEEE 1394 nodes, can operate according to the AV/C agreement.Video recorder 100 can comprise that tuner 110 and magnetic recording/reproducing part 120 as subelement, also can comprise the configuration ROM 130 of the information of storing relevant video recorder.In addition, video recorder 100 can be handled " MPEG2 " transport stream " (Motion Picture Experts Group) and " digital VCR " (videocassette recorder) video data format.

Fig. 2 represents the periodic structure according to the data of the device transmission of IEEE 1394 connections.In IEEE1394, data are divided into bag, and transmit with time-sharing format according to the cycle of 125 μ s (microsecond).This cycle is set up by the cycle commencing signal that the electronic equipment with dominant period function provides.Sync packet is guaranteed the necessary bandwidth of transmission (time quantum is known as bandwidth) that begins from each cycle.So synchronous transmission has guaranteed the data transmission in the set time.But if error of transmission, then data will be lost because of unprotect mechanism.

In the time that is not used in synchronous transmission in each cycle, the electronic equipment that has taken bus as the result who arbitrates sends asynchronous bag.Asynchronous transmission guarantees safe transmission by utilizing affirmation and retry, but transmit timing will be indefinite.

In order to make predetermined electronic equipment can carry out synchronous transmission, these electronic equipments must have synchronizing function.In addition, at least one in these electronic equipments must have the dominant period function.Also have, at least one electronic equipment that is connected with IEEE 1394 universal serial bus has isochronous resource manager function.

IEEE 1394 can be based on " control and status register (" the CSR ") framework that have according to 64 bit address space of ISO/IEC (ISO (International Standards Organization)/International Electrotechnical Commission) 13213 regulations.Fig. 3 represents to meet the structure of the address space of CSR structure.High 16 bits can form the node ID of the node on every IEEE1394 bus of expression.All the other 48 bits can be used to assignment of allocation and give each space, address of node.In addition, these high 16 bits can be divided into the bus ID of 10 bits and the actual ID of 6 bits (node ID of narrow sense).Because all bits all are set to 1 value and can be used to specific purposes, so they can specify 1023 buses and 63 nodes.

In the address space of 256 terabytes of low 48 bits regulation, can be divided into the initial register space (Initial Register Space), private space (Private Space), initial memory space (Initial Memory Space) of use in the register in the CSR of 2048 bytes special use, the register of IEEE 1394 special uses etc. etc. by the space of high 20 bits regulation.If the space by its high 20 bits regulation is initial register space etc., then the space by low 28 bits regulation can be used as: use and be exclusively used in the initial cell space (Initial Unit Space), plug control register (Plug ControlRegister (" PCR ")) of a node etc. in configuration ROM 130.Can be arranged in address 400h to the 800h scope in the initial register space based on the above-mentioned configuration ROM 130 of general ROM form.

Though each electronic equipment all has CSR shown in Figure 3, with regard to the register that bandwidth can be used, those that have only that Isochronous Resource Manager comprises are only effectively.In other words, bandwidth can with register in fact only comprised by Isochronous Resource Manager.

If in synchronous communication, do not distribute bandwidth, just in bandwidth can be with register, store maximal value, whenever bandwidth is assigned with, just reduce its value.

Each bit of Channels Available Register between skew 224h and 228h corresponds respectively to channel number 0 to 63.If a certain bit equals zero, just show that respective channel is assigned with.In this case, have only Channels Available Register to be only effectively as the electronic equipment of Isochronous Resource Manager operation.

In order to control per unit input and output by interface, each equipment has the PCR from address 900h to 9FFh in initial cell shown in Figure 3 space (plug control register) by IEC 61883 regulations.A kind of the specializing of the notion of plug (plug) is formed in the signal path that is similar to analog interface in logic.

Fig. 4 represents the structure of PCR.PCR has output plug control register (" oPCR ") that is used for representing output plug and the input plug control register (" iPCR ") that is used for representing input plug.In addition, PCR also has the main plug register of input (" oMPR ") and the input main plug register (" iMPR ") of the information of each device specific of expression on output plug or input plug.Each equipment can not have a plurality of oMPR and iMPR, but can have a plurality of oPCR and iPCR corresponding to each plug.PCR shown in Figure 4 has 31 oPCR and iPCR respectively.Control flowing of synchrodata by operation corresponding to the register of these plugs.

Fig. 5 A to 5D represents the structure of oMPR, oPCR, iMPR and iPCR: Fig. 5 A represents the structure of oMPR; Fig. 5 B represents the structure of oPCR; Fig. 5 C represents the structure of iMPR; Fig. 5 D represents the structure of iPCR.The area stores of the data rate capabilities of 2 bits of oMPR and iMPR one end is represented the maximum transfer speed of the synchrodata that can be transmitted or receive by this equipment.The channel number that the zoning of the broadcast channel radix of oMPR is used for broadcasting output.

The number of the output plug that the number of areas storage representation relevant device of the output plug of 5 bits of the oMPR other end has, be the value of the number of oPCR.The number of the input plug that the number of areas storage representation relevant device of the input plug of 5 bits of the iMPR other end is gathered around, be the value of the number of iPCR.The zone of impermanent extended field and permanent extended field is the zone of using for expansion in the future.

The user mode of each online region representation plug of oPCR and iPCR one end.In other words, 1 numeric representation plug is online, and 0 value representation plug off-line.The value representation broadcasting of each broadcasting linkage counter of oPCR and iPCR is connected and has (1) or do not have (0).The number that the point-to-point that the relevant plug of the value representation of each point-to-point linkage counter (6 bit width) of oPCR and iPCR has is connected.The synchronizing channel that the relevant plug of value representation of each channel number of oPCR and iPCR (6 bit width) is attached thereto number.The actual transmission speed of the synchronization packets of the relevant plug output of the value representation of the data rate of oPCR (2 bit width).Be stored in the bandwidth of the expense of the coded representation synchronous communication in expense ID (4 bit width) zone of oPCR.The maximal value of the data that sync packet comprised that the relevant plug of the value representation of the payload of oPCR (10 bit width) can be handled.

Fig. 6 represents the relation between plug, plug control register and the synchronizing channel.AV (audiovisual) equipment 50 to 52 is connected to each other by IEEE 1394 universal serial bus.The synchrodata that its channel is determined by the oMPR of AV equipment 52 by the number of (oPCR (0) to oPCR (2) in) oPCR (1) regulation, its transmission speed and oPCR is sent to the channel 1 of IEEE 1394 universal serial bus.The synchrodata of the channel 1 that sends to IEEE 1394 universal serial bus is read and stored to AV equipment 50.Similarly, AV equipment 51 sends synchrodata to the channel 2 by oPCR (0) regulation, and AV equipment 50 reads out the synchrodata of the channel 2 of free iPCR (1) regulation, and stores it.

Below be described in the AV/C command set that adopts in the audio system shown in Figure 1 referring to Fig. 7 and 8.

Fig. 7 represents the control command and the response that send asynchronously.As shown in Figure 7, the control side is represented with " controller " and controlled side is represented with " target ".The asynchronous transmission of utilization on IEEE 1394 write that issued transaction (transaction) carries out the transmission of control command between electronic equipment or to the response of this order.Target reception data are returned to controller and are acknowledged receipt of (ACK), to confirm the reception of data.

Fig. 8 represents the relation between control command shown in Figure 7 and the response in more detail.Electronic equipment A is connected with electronic equipment B by IEEE 1394 buses.Electronic equipment A is a controller, and electronic equipment B is a target.Electronic equipment A and electronic equipment B have command register and response register, and each all is 512 bytes.As shown in Figure 8, controller (device A) transmits order by the command register 123 that command messages is write target (equipment B).On the contrary, target (equipment B) is by transmitting response to the response register 122 of response message writing controller (device A).So control information utilizes these two kinds of message to exchange.

Fig. 9 is the diagram of expression for the part of the synchronous transmission bag of above-mentioned synchronous transmission use.The designated head of this bag, this head occupies 32 * 2 bits of front, comprises synchronous mode (sy), bag code (tcode), channel, mark, data length and error correcting code (CRC).In the continuous bag count value (DBC) of the data of dividing regular length when being responsible for assigning to each, number of partitions (FN), block size (DBS) and itself identification code (SID) etc. of sign (SPH), the source bag of active packet header are distributed to subsequently 32 bits to keep (RSV), expression.Posting field as time mark (SYT), the sampling frequency (FDF) that is sent out data, transformat (FMT) etc. are distributed to subsequently 32 bits.Giving 32 bits of back again the data allocations of being made up of the source data of a unit of 32 bits that is sent out again, is error correcting code (CRC) at these ends that are sent out data.

In addition, in the present example, to add expression transmission of audio signals speed be controlled mark (FC) to a bit (bit of the position that with dashed lines fences up among Fig. 9) that is used in the specific location in sampling frequency (FDF) zone that 8 bits form.If this mark (FC) is " 1 " signal, just expression has entered the controlled pattern of transfer rate.If mark (FC) is " 0 " signal, just expression has entered the not controlled pattern of transfer rate.In the following description, the controlled pattern of transfer rate is called the current control pattern.

The chained block (not shown) of the video recorder 100 of Fig. 1 adds digital audio and video signals (DA), digital video signal (DV) etc. for this synchronous driving bag according to fixing unit, and sends it to bus 20 by input-output circuit (not shown).

Figure 10 is that expression utilizes above-mentioned control command etc. to carry out the diagram of the asynchronous communication bag of asynchronous communication one to one.The input-output circuit of video recorder 100 is in the address of wrapping node that expression its oneself is set and bus number etc. etc., so that with its transmission.Specifically, from 32 bits previously of bag be assigned to retry (retry) code (rt) of code (tCode), this bag of priority (priority), this bag of this bag, the recognition data (imm) of the relation of wrapping continuously to this label that is responsible for assigning (tLabel), transmission speed (spd) and expression.In addition, the data (the destination skew is high, and the destination skew is low) of address of node, regulation destination and the data (destination ID) of expression destination node and bus have also been distributed.Also distributed the data length (data length) of transmission data etc., these transmission data are distributed with unit of 32 bits.

The chained block of video recorder 100 receives the bag of the One-to-one communication that the input-output circuit receives, to the treatment facility (not shown), inform the data of distributing to this bag as principal computer or integrated CPU (central processing unit) (" CPU ").Like this, just the various control commands that are sent to video recorder 100 from an equipment (not shown) have been informed to treating apparatus.

As for the data communication between the equipment that connects according to IEEE 1394, can be as a reference, that submit on January 25th, 2000, application number is 09/490,827 unexamined U.S. Patent application referring to here citing.

Figure 11 represents the data structure of configuration ROM 130 shown in Figure 1.Configuration ROM 130 can comprise bus message piece " Bus information block ", root directory " Root Directory ", example directories " Instance Directory " and unit catalogue " Unit Directory ".

Figure 12 represents the data structure of bus message piece shown in Figure 11.Preceding 5 four hytes of ROM 130 can comprise the bus message piece.Unique value can be assigned to " node-vendor-id (node vendor id) ", " chip-id-hi (the chip id height) " and " chip-id-lo (chip id is low) " of 64 bits in the bus message piece, each equipment can be distinguished from each other thus and come." node-vendor-id " can distribute to manufacturer by IEEE/RAC (the registration management council)." chip-id-hi " and " chip-id-lo " can be 40 bits, that quilt " node-vendor-id " distributes uniquely altogether ID.

Get back to Figure 11, vendor id can be positioned at the inlet of root directory " Vendor (manufacturer) "." Textualdescriptor (letter descriptor) " can follow this " Vendor " inlet.The position of " Textual descriptor " can be represented with " Descriptor leaf offset (descriptor finger offsets) ".In an embodiment of the present invention, the minimum ASC II character of expression manufacturer can be positioned at " Textual descriptor " and locates.

Perhaps, as shown in figure 13, the position " Descriptor Directory offset (skew of descriptor catalogue) " of expression " Descriptor Directory (descriptor catalogue) " can be positioned at the root directory place." the Descriptor leaf offset " of the position of expression pressure (" Mandatory ") " Textual descriptor " can be positioned at " Descriptor Directory " and locate." Descriptor leaf offset " can also represent to choose wantonly the position of (" Optional ") " Texture descriptor ", " Icon descriptor (icon depicting symbol) " etc.In this case, minimum ASC II character can be positioned at optional (" Optional ") " Texturedescriptor " and locates.Also have, the icon data of expression manufacturer can be positioned at " Icon descriptor " and locate.

Referring again to Fig. 1, example directories can be the catalogue of some examples of function of the electronic equipment of expression its oneself.Root directory can comprise " Instance directory offset (the example directories skew) " of the position of representing example directories.In addition, example directories can also comprise " Unit directory offset (skew of unit catalogue) " of the position of position of expression " Keyword leaf (key branching) " " Keyword leaf offset (key branching skew) " and expression unit catalogue.

Node as the access unit on IEEE 1394 buses can comprise a plurality of unit, and these unit can be operated independently, and some nodes can the shared address space.The unit catalogue can be represented the version and the position of the software of this unit.Point out that in passing though the position of bus message piece and root directory is fixed, other piece can utilize offset address to determine.

The information that is illustrated in the type of all subelements in the electronic equipment can be used as key word and is positioned at " Keyword leaf " and locates.This key word can be represented with the capitalization " A to Z " in the alphabet, numerical value " 0 to 9 " and hyphen "-".Figure 14 represents some examples of the corresponding relation between subelement type (" Subunit Type ") and the key word (" Keyword ").In one embodiment of this invention, video recorder 100 within it portion comprise tuner 110 and magnetic recording/reproducing part 120 as subelement.For this reason, " TUNER " of expression tuner 110 and " TAPE (tape) " of representing magnetic recording/reproducing part 120 can be used as key word and are positioned at " Keyword leaf " and locate.

Information that can be handled by the subelement in the electronic equipment in addition,, the expression full format can be used as key word and is positioned at " Keyword leaf " and locates.Some examples of corresponding relation between Figure 15 presentation format (" Format ") and the key word (" Keyword ").In finishing mode of the present invention, the video data of " MPEG 2 (Motion Picture Experts Group) transport stream " and " digital VCR (video recorder) " form can be processed.For this reason, " the MPEG 2-TS " of expression " MPEG 2 transport streams " and " DV " that represent " digital VCR " can be used as key word and are positioned at " Keyword leaf " and locate.

Get back to Figure 11, root directory can comprise " the Unit directoryoffset " of the position of expression unit catalogue.The unit catalogue can comprise the inlet of " Specifier-ID (indicator ID) ", " Version (version) " and " Model (model) ".Model ID can be positioned at " Model " porch." Textualdescriptor " can follow this " Model " inlet.The position of " Textual descriptor " can be represented with " Descriptor leaf offset ".In an embodiment of the present invention, the minimum ASC II character of expression model name can be positioned at " Textual descriptor " and locates.

Perhaps, as shown in figure 16, " the DescriptorDirectory offset " of expression " Descriptor Directory " position can be positioned at the root directory place, for example, expression is forced " the Descriptor leaf offset " of (" Mandatory ") " Textualdescriptor " position can be positioned at " Descriptor Directory " and is located optional (" Optional ") " the Textual descriptor " of expression, " Icon descriptor ", " the Descriptor leaf offset " of the position of " Modifiabledescriptor (can revise descriptor) " etc. can be positioned at same place.In this case, the minimum ASC II character of expression model name can be positioned at pressure (" Mandatory ") " Textual descriptor " and locates.The icon data of model can be positioned at " Icondescriptor " and locate.Also have, other data of expression model can be positioned at " Modifiable descriptor " and locate.

As mentioned above, according to embodiments of the invention, the information of the type of each subelement in the expression video recorder can be used as key word and is stored in the configuration ROM 130.Also have, the information that expression can videoed the form of the data that each subelement in the machine 100 handle also can be stored in the configuration ROM 130.Other electronic equipment direct access that configuration ROM 130 can be operated according to the agreement that is different from the AV/C agreement.Therefore, in the network system of Fig. 1, even when for example IRD 10 can operate according to the agreement that is different from the AV/C agreement, IRD 10 also can direct access video recorder 100 configuration ROM 130, and can easily obtain the format information of the data that the subelements in the machine that can videoed 100 handle.

By the way, though in the above embodiment of the present invention, the information about each subelement in the configuration ROM 130 of being stored in are the information of the data layout that can be handled by these subelements of the information and representing of the type of each subelement of expression, but the present invention is not limited.

Also have, though in invention described above, invention is applied to video recorder 100, and much less, the present invention can be applied to comprising other electronic equipment of similar configuration ROM equally.

According to the present invention and since the information of relevant subelement be stored in can by in addition the storage arrangement of other electronic equipment direct access of operating according to different agreement in, so this information can easily be obtained by these electronic equipments.In addition because electronic equipment comprises with minimum ASC II form and stored the storage arrangement of manufacturer or model name, so if electronic equipment be minimum ASC II to its effective electronic equipment, then manufacturer or model name just can easily be shown.

This shows, except that above description can be known the purpose of finding out, above-mentioned purpose has all obtained effective realization, because do not break away from spirit of the present invention and do not exceed its scope and can make some improvement aspect execution said method and the said structure, so will be appreciated that, more than describe comprised, the shown content of removing is illustrative and not restrictive in the accompanying drawing.

It should also be appreciated that appended claims is used for covering the general and specific feature of invention described herein, also be used for covering the explanation because of language of the present invention and can be considered to be in all statements in its scope.

Claims (28)

1. one kind is carried out the equipment that the operation handlebar data send bus to according to first agreement, and this equipment comprises:

The DIU data interface unit of input and output data; And

Store the data storage device of the information of closing the equipment that relates to first agreement, this data storage device can be carried out access by DIU data interface unit by the miscellaneous equipment of operating according to second agreement.

2. according to the equipment of claim 1, first agreement wherein is a host-host protocol.

3. according to the equipment of claim 1, first agreement wherein is the function control protocol.

4. according to the equipment of claim 3, first agreement wherein is the AV/C agreement.

5. according to the equipment of claim 1, data storage device is wherein stored information as key word.

6. according to the equipment of claim 1, data storage device wherein is with the hierarchical form canned data.

7. according to the equipment of claim 1, information wherein comprises the information of the function type of indication equipment.

8. according to the equipment of claim 7, also comprise one or more subelements, the information of the function type of indication equipment wherein comprises the information of the type of representing at least one these subelement.

9. according to the equipment of claim 1, data storage device wherein is with the mode canned data of minimum ASC II.

10. according to the equipment of claim 9, data storage device wherein comes canned data with letter.

11. according to the equipment of claim 9, data storage device wherein comes canned data with numeral.

12. according to the equipment of claim 9, data storage device stores trade name wherein.

13. according to the equipment of claim 9, data storage device stores model name wherein.

14. according to the equipment of claim 9, information wherein comprises the information of representing data layout.

15. one kind obtains the method for data from carry out apparatus operating according to first agreement, this equipment comprises data storage device and DIU data interface unit, and this method may further comprise the steps:

The information stores of the relevant equipment that relates to first agreement in data storage device; And

Come acquired information by DIU data interface unit access data memory storage, data storage device wherein can be carried out access by DIU data interface unit by the miscellaneous equipment of operating according to second agreement.

16. according to the method for claim 15, first agreement wherein is a host-host protocol.

17. according to the method for claim 15, first agreement wherein is the function control protocol.

18. according to the method for claim 17, first agreement wherein is the AV/C agreement.

19. according to the method for claim 15, data storage device is wherein stored information as key word.

20. according to the method for claim 15, data storage device wherein is with the hierarchical form canned data.

21. according to the method for claim 15, information wherein comprises the information of the function type of indication equipment.

22. according to the method for claim 21, equipment wherein also comprises one or more subelements, and the information of the function type of indication equipment comprises the information of the type of representing at least one these subelement.

23. according to the method for claim 15, data storage device wherein is with the mode canned data of minimum ASC II.

24. according to the method for claim 23, data storage device wherein comes canned data with letter.

25. according to the method for claim 23, data storage device wherein comes canned data with numeral.

26. according to the method for claim 23, data storage device stores trade name wherein.

27. according to the method for claim 23, data storage device stores model name wherein.

28. according to the method for claim 15, information wherein comprises the information of representing data layout.

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