CN1211127A - Electronic equipment and protocol switching method therefor - Google Patents
Electronic equipment and protocol switching method therefor Download PDFInfo
- Publication number
- CN1211127A CN1211127A CN98103352A CN98103352A CN1211127A CN 1211127 A CN1211127 A CN 1211127A CN 98103352 A CN98103352 A CN 98103352A CN 98103352 A CN98103352 A CN 98103352A CN 1211127 A CN1211127 A CN 1211127A
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- China
- Prior art keywords
- electronic equipment
- agreements
- bus
- agreement
- command
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/387—Information transfer, e.g. on bus using universal interface adapter for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40052—High-speed IEEE 1394 serial bus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0012—High speed serial bus, e.g. IEEE P1394
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Television Signal Processing For Recording (AREA)
- Communication Control (AREA)
- Small-Scale Networks (AREA)
Abstract
PROBLEM TO BE SOLVED: To enable the equipment which is connected to a bus to respond to a plurality of protocols on the bus. SOLUTION: When a CD player is to be controlled, for example, information on a subunit identifier descriptor in the CD players is read out (step S1) and a disk list entry is read out (step S2). Then, it is determined on the basis of the read information or the like whether or not a disk can operate by an AV/C command (step S3) and, if the answer is Yes, a control is performed by the AV/C command (step S4). If No is obtained at the step S3, it is determined whether the disk can operate by other command (step S5); if the answer is Yes, control is performed by the command (step S6) and when No, the control is not performed.
Description
The present invention relates to can to install on it such as IEEE 1394 high-speed serial bus (below be referred to as the bus of a plurality of agreements of 1394 universal serial bus, more particularly, relate to and can make the electronic equipment that is connected to bus technology corresponding to a plurality of agreements.
Here relate to a kind of communication system, in this communication system, electronic equipment (below be referred to as equipment), as personal computer (below be referred to as PC), digital VTR (below be referred to as DVCR) and digital television receiver, be connected by bus, they meet IEEE 1394 standards, and this connected mode makes digital video signal, digital audio and video signals and the control signal between these equipment transmit by packet and accepts.
In this communication system, can between equipment, carry out when transmitting the waiting of real time data such as digital vision signal and digital audio and video signals (below be called Isoch) with fixing interval and communicate by letter, also can communicate by letter with asynchronous (below be called Asynch) that be connected control command in execution transmission control signal such as operation of equipment control command between the equipment on request at interval with on-fixed.
In the aforementioned communication system,, an AV/C about FCP (function control protocol) (audio frequency-visual/control) command set is arranged as an order that is used for AV (audio frequency-visual) Equipment Control.In addition, as an agreement between PC and its ancillary equipment, can use SBP (serial bus protocol) and PC control command such as SCSI-3.
Figure 11 A shows by 1394 universal serial bus a CD player (below be referred to as CDP) is connected to the system that an audio frequency amplifier obtains.In this system, CDP is used as audio frequency apparatus.By the AV/C command set, can carry out the broadcast of machinery control as CD-DA (digital audio) and time-out and the control by catalogue such as program selection.
On the other hand, Figure 11 B shows by 1394 universal serial bus a disk drive is connected to the system that PC obtains.In this system, disk drive is used as the ancillary equipment of PC.In this system, can carry out file access to CD-ROM etc. by using PC control command such as SCSI.
In these equipment, (CD-DA CD-ROM) has different application, and such as inserting disk drive, if only support a kind of order of agreement, the application of this equipment will be restricted for different media.
In the AV/C command set, can carry out the machinery of CD-DA and control and use aforesaid catalogue and control.Simultaneously, it be consistent from the control of a plurality of controllers (sending the equipment of order side) and the operation of main body.Come the reliable control of self-controller not to be guaranteed conversely speaking.And, because AV equipment Be Controlled, so can not visit for example file of CD-ROM.
In addition, under PC control command, be possible as the file access of CD-ROM as SCSI, simultaneously, it also with machinery control as the broadcast of CD-DA with suspend consistent.Yet, need by controller (exciter) control as PC for control one by one reliably.
An object of the present invention is to make that the equipment of receiving on the bus is corresponding with a plurality of agreements on the bus.
Fig. 1 shows the structure chart of using a system of the present invention;
Fig. 2 shows the block diagram of the inside of CDP among Fig. 1;
Fig. 3 shows an example of the object listing that a plate unit has;
Fig. 4 shows an example of the object listing mid-game list-item in Fig. 3;
Fig. 5 A and 5B show the configuration example of a subelement identification descriptor;
Fig. 6 A and 6B show example and other command specification at subelement identification descriptor medium type field;
Fig. 7 is the flow chart of an order hand-off process;
Fig. 8 A and 8B show another structure chart of using system of the present invention;
Fig. 9 is the block diagram of the detailed structure of system shown in Figure 8;
Figure 10 is the flow chart that the IRD among Fig. 9 handles; And
Figure 11 A and 11B are the diagrammatic sketch of CDP connection mode.
Below, be described in detail with reference to the attached drawings one embodiment of the present of invention.
Fig. 1 shows the structure chart of using a system of the present invention.This system comprises PC1, DVCR2, monitoring arrangement 3, CDP4 and audio frequency amplifier 5 as equipment, and each parts of this equipment are connected by 1394 serial bus cables 6 to 9.In this system, DVCR2, monitor 3, CDP4 and audio frequency amplifier 5 are corresponding with the AV/C order.Simultaneously, PC1 is corresponding with the PC control command with CDP4.That is, CDP4 is corresponding to AV/C order and PC control command.
Fig. 2 shows the block diagram of the inside of CDP4 among Fig. 1.In this CDP, these are provided for pick device 11, signal processing circuit 12, CD decoder 13, mechanical control device 14, servo circuit 15, motor 16, D/A converter 17 and CD-ROM decoder 18 in well-known CD Player or the well-known CD-ROM drive, and these parts of equipment directly do not relate to the present invention, therefore omit the description to it.
If in CDP, put into the CD-DA dish, according to the audio transmission agreement, the digital audio and video signals that audio transmission piece 19 is handled by 13 decodings of CD decoder.Its output is converted into the Isoch packets of information by 1394 interfaces 20 and is transferred on 1394 universal serial bus.
If in CDP, put into the CD-ROM dish, according to the SCSI agreement, the data that digital interface controller 21 is handled by 18 decodings of CD-ROM decoder.Its output is converted into the Asynch packets of information by 1394 interfaces 20 and is transferred on 1394 universal serial bus.
In the AV/C command set, there is the notion of using object listing (target one tabulation) to select.This notion is introduced into the plate unit of CDP, thereby makes the selection of the system that for example comprises that 200 CD transducers are such.The plate unit has object listing as shown in Figure 3.Each project of listing in the dish tabulation is consistent with the groove in the transducer.Therefore, in the situation of ordinary playing device that is not transducer, in the dish tabulation, has only a project.Each project in the dish tabulation has the son tabulation (childlist) that is called as the track tabulation.By this track tabulation, can select program.In this regard, when placing CD-DA in CDP, based on the information in the toc region territory that writes on CD-DA, system controller 23 will coil the information storage of tabulation and track tabulation in internal storage.Fig. 4 illustrates an example of dish list-item.
For with PC order coexistence, the media type of being supported by the AV/C command set and remove media type that other order the AV/C order supports and write on subelement shown in Figure 5 in advance and discern on the descriptor.This subelement identification descriptor can be provided as the part of the ROM in the system controller 22 of above-mentioned Fig. 2.In addition, it is not stored among the above-mentioned ROM in advance, is stored but can wait from network to download to generate.
In Fig. 5, subelement type (subunit-type) field has a sign position, whether the expression subelement has a driving function (normally) or a gateway (gateway), this gateway has the function of implementing control when receiving the AV/C order, when the driving arrangement reality corresponding to this subelement does not exist, corresponding with it, AV/C order control external equipment.
And, in the field of the media type (number-of-supported-medium-types) of some supports, write the number (the m part among Fig. 5) of the media type of supporting by the AV/C command set, in media type (medium-type) field thereafter, write the type of the medium of support.Fig. 6 A shows an example of media type.
And, in Fig. 5, in some other control command (number-of-other-control-commands) fields, write the corresponding number order (the n part among Fig. 5) of other order except that the AV/C order, in other control command field (other-command) of this field back, for each order, the information shown in Fig. 6 B is write.
Then, with reference to figure 7, will the order hand-off process in the controller be described.For example, when the monitor apparatus among Fig. 13 will be controlled CDP4, monitor apparatus 3 at first read the subelement identification descriptor (step S1) among the CDP4, then reads dish list-item (step S2).Read by the AV/C order that is arranged on the Asynch packets of information on 1394 universal serial bus.
Then, whether monitor apparatus 3 to measure it be that the AV/C order can corresponding with it dish (step S3).More particularly, whether the information in media type (medium-type) field of its definite subelement identification descriptor that has been read in step S1 is included in the media type of the dish tabulation of reading among the step S2.
Which what particularly, be inserted in the groove of CDP4, with reference to the project of dish tabulation in order to find out dish.When, for example, when inserting a CD-ROM dish, CD-DATA (" 0101 ") enters in the media type field of list content.If CDP does not correspond to CD-ROM, CD-DATA is not written in some media type fields (number-of-supported-medium-types) media type field (medium-type) afterwards of subelement identification descriptor support.
If at step S3 is YES, under the AV/C order, carry out control (step S4).
If step S3 is NO, determine that whether dish is corresponding to other orders (step S5).More particularly, determine whether the media type that is write is included in the media type of the dish tabulation of reading among the step S2 in other control command (other-command) field of the subelement identification descriptor that step S1 has been read.
For example, if it is corresponding to the access under the scsi command, it is corresponding to the CD-DATA under the scsi command in other control command explanation (other-command-specification) as can be known.
If among the step S5 be YES, carry out control (step S6) under the order that in above-mentioned other control command (other-command) field, is write.
If be NO in step S5,, do not carry out control (step S7) because CDP is not corresponding with the dish of setting.
Fig. 8 A shows the another kind of structure of using system of the present invention.In this system, an IRD (comprehensive receiver decoder) 32, hard disk unit 31 are connected by 1394 serial bus cables 34,35 with monitor apparatus 33, thereby IRD 32 controls hard disk unit 31 under scsi command and order control with AV/C between IRD 32 and monitor apparatus 33.In this system, shown in Fig. 8 B, hard disk unit 31 is processed as the plate unit of IRD 32.That is, comprise at IRD under the situation of hard disk, it can be in Be Controlled under the AV/C order.
Fig. 9 is the more detailed block diagram of Fig. 8 A.In the IRD 32 of this system, front end 41, splitter 42, Video Decoder 43, D/A converter 44 and audio decoder 45, D/A converter 46 and a conditional jump access block 47 are known, and directly do not relate to the processing of control command, therefore, its description is omitted.
In this system, a tuner descriptor and a HD descriptor are provided in memory 49, memory 49 is connected to the processor 48 among the IRD 32.Processor 48 has a translation function between AV/C order and scsi command.Monitor apparatus 33 has a processor 62 and a digital interface 61, operates as a controller (transmitting terminal of AV/C order) at this.And hard disk unit 31 has a processor 52, a digital interface 51 and a hard disk unit 53, operates at this receiver end as scsi command.
Reference flowchart Figure 10 will be described the processing of IRD shown in Figure 9 32.
IRD accepts the AV/C order (step S11) of HD device 31.More particularly, the AV/C order of the HD device 31 that the processor 62 in the monitor apparatus 33 produces is converted to an Asynch packets of information on 1394 serial bus by digital interface 61, and be input to digital interface 50 among the IRD 32 by 1394 serial bus cables 35, separated in this AV/C order, be input to processor 48.
HD descriptor in processor 48 reference memory 49 determines whether the plate unit has a gateway function (step S12).If there is not the gateway function, processor 48 produces an AV/C response " not finishing ", and returns monitor apparatus 33 (step S13) by digital interface 50 and 1394 serial bus cables 35.
If be YES among the step S12, determine whether HD device 31 can Be Controlled (step S14).If can not Be Controlled, processor 48 will return AV/C response " being rejected " (step S15).For example, if HD device 31 is just being carried out another operation now, can not control it.
If determine may command in step S14, processor 48 will return AV/C response " time-out " (step S16).
Then, processor 48 becomes the AV/C command conversion of the HD that accepts at step S11 scsi command (step S17) to control HD device 31 (step S18).More particularly, the scsi command that processor 48 converts to is sent to 1394 universal serial bus 34 by digital interface 50 as an Asynch packets of information, and is sent to HD device 31.Digital interface 51 in the HD device 31 is accepted this Asynch packets of information, and is sent to processor 52 at this extraction scsi command.Processor 52 is according to scsi command control HDD 53.After the control HD, the processor 48 among the IRD 32 returns AV/C response " acceptance " (step 19).
As mentioned above, under AV/C order, monitor apparatus 33 can be controlled as a plate unit pack and be contained in hard disk unit 31 among the IRD32.
The as above detailed description of being carried out according to the present invention, is connected to the equipment of the bus a plurality of agreements on can response bus.Therefore, when insertion needs the medium of file access, for example control AV equipment under the AV/C command set, whether the level of AV/C order can be discerned AV equipment can be by the access of another agreement acquisition to the medium of insertion.Therefore, based on this information, controller can method for handover control.
Claims (9)
1. be connected to the electronic equipment of bus, on bus a plurality of agreements can be set, this equipment comprises storage and described agreement first storage device for information about, and described electronic equipment is corresponding to these agreements.
2. electronic equipment as claimed in claim 1, wherein said bus is the IEEE1394 high-speed serial bus.
3. electronic equipment as claimed in claim 2, wherein said a plurality of agreements are set up by the descriptor of setting corresponding to each destination apparatus.
4. electronic equipment as claimed in claim 1, wherein said a plurality of agreements are the agreements that are used for the agreement of audio frequency-visual device and are used for computer peripheral.
5. electronic equipment as claimed in claim 2, wherein said a plurality of agreements are AV/C order and scsi command.
6. electronic equipment as claimed in claim 1 further comprises the function that comprises the digital information signal of digital audio and video signals from recording medium reproducing.
7. the protocol switching method of electronic equipment is used on bus a plurality of agreements can being set being connected to bus corresponding to the electronic equipment of a plurality of agreements, switches the agreement of using by described electronic equipment, comprises following steps:
From wanting controlled described electronic equipment to read the information relevant with agreement, described electronic equipment is corresponding to these information relevant with agreement; With
By the described agreement of the described Information Selection of reference.
8. be connected to the electronic equipment of bus, a plurality of agreements can be set on the bus, wherein the electronic equipment corresponding to described a plurality of agreements is connected to described bus, and only the electronic equipment corresponding to a predetermined protocol in said a plurality of agreements is used as a sub-cell processing.
9. the protocol switching method of electronic equipment comprises step:
Can be corresponding to first electronic equipment of a plurality of agreements, can on bus, a plurality of agreements can be set to corresponding to second electronic equipment of a predetermined protocol in described a plurality of agreements with can be only be connected to bus corresponding to the 3rd electronic equipment of another predetermined protocol in described a plurality of agreements;
Under described predetermined agreement, described second electronic equipment transmits the control command of described the 3rd electronic equipment to described first electronic equipment; With
Described first electronic equipment converts the control command of accepting to described another predetermined agreement, is sent to described the 3rd electronic equipment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9177917A JPH1127299A (en) | 1997-07-03 | 1997-07-03 | Electric appliance and protocol switching method for the same |
| JP177917/97 | 1997-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1211127A true CN1211127A (en) | 1999-03-17 |
Family
ID=16039331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98103352A Pending CN1211127A (en) | 1997-07-03 | 1998-07-03 | Electronic equipment and protocol switching method therefor |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH1127299A (en) |
| KR (1) | KR19990013523A (en) |
| CN (1) | CN1211127A (en) |
| ID (1) | ID20746A (en) |
| TW (1) | TW381382B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000069122A1 (en) * | 1999-05-11 | 2000-11-16 | Sony Corporation | Network connection recognition method, network system and network connection terminal device |
| WO2000069121A1 (en) * | 1999-05-07 | 2000-11-16 | Sony Corporation | Information processing method, information processing system and information processor |
| CN1302371C (en) * | 1999-08-19 | 2007-02-28 | 索尼公司 | Image processing and printing method and device, printing system method and recording medium |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000332801A (en) * | 1999-05-19 | 2000-11-30 | Matsushita Electric Ind Co Ltd | Device and method for building up virtual av network and storage medium recording program relating to the method for building up virtual av network |
| JP2002185880A (en) * | 2000-12-14 | 2002-06-28 | Sony Corp | Information processing unit and method, receiver and method, and recording medium |
| JP2007150697A (en) * | 2005-11-28 | 2007-06-14 | Ricoh Co Ltd | Communication apparatus, communication control method, communication control program, and recording medium |
-
1997
- 1997-07-03 JP JP9177917A patent/JPH1127299A/en not_active Withdrawn
-
1998
- 1998-06-29 TW TW087110475A patent/TW381382B/en not_active IP Right Cessation
- 1998-07-02 KR KR1019980026521A patent/KR19990013523A/en not_active Application Discontinuation
- 1998-07-02 ID IDP980949A patent/ID20746A/en unknown
- 1998-07-03 CN CN98103352A patent/CN1211127A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000069121A1 (en) * | 1999-05-07 | 2000-11-16 | Sony Corporation | Information processing method, information processing system and information processor |
| US6941059B1 (en) | 1999-05-07 | 2005-09-06 | Sony Corporation | Information processing method, information processing system and information processor |
| US7088908B2 (en) | 1999-05-07 | 2006-08-08 | Sony Corporation | Information processing method, information processing system and information processing apparatus |
| US7095946B2 (en) | 1999-05-07 | 2006-08-22 | Sony Corporation | Information processing method, information processing system and information processing apparatus |
| US7130523B2 (en) | 1999-05-07 | 2006-10-31 | Sony Corporation | Information processing method, information processing system and information processing apparatus |
| WO2000069122A1 (en) * | 1999-05-11 | 2000-11-16 | Sony Corporation | Network connection recognition method, network system and network connection terminal device |
| CN1302371C (en) * | 1999-08-19 | 2007-02-28 | 索尼公司 | Image processing and printing method and device, printing system method and recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| TW381382B (en) | 2000-02-01 |
| KR19990013523A (en) | 1999-02-25 |
| ID20746A (en) | 1999-02-25 |
| JPH1127299A (en) | 1999-01-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |