KR20060117386A - Methode for processing same type slave device in device link system based television - Google Patents

Abstract

A method of processing slave devices of the same type in a device link system based on television is provided to change physical IDs(Identifications) allocated to the slave devices of the same type such that the slave devices have different physical IDs to prevent the generation of communication error. A master device of a device link system based on television generates and transmits a request message for detecting slave devices. Each of the slave devices receives the request message, initiates a physical ID allocated thereto, generates a response message and transmits the response message to the master device. The master device determines whether there are slave devices of the same type with reference to the physical ID of each slave device, which is included in the response message. When there are slave devices of the same type, the master device generates a request message for requesting the physical ID to be changed and transmits the request message to the slave devices of the same type. The slave devices of the same type arbitrary change their initialized physical IDs.

Description

Method for processing same type slave device in device link system based television}

1 shows an overall configuration of a device link system according to the present invention,

2 illustrates a stereo jack applied to a device link system according to the present invention,

Figure 3 illustrates an embodiment of a television remote control applied to the device link system according to the present invention.

4 illustrates an embodiment of an interface structure of a slave device to which the present invention is applied;

FIG. 5 illustrates an embodiment in which a master device and a slave device to which the present invention is applied transmit and receive a command through a daisy chain method.

6 illustrates a configuration of a request message format according to the present invention;

7 illustrates a configuration of a response message format according to the present invention;

8 illustrates an embodiment in which a request message and a response message are transmitted / received according to the present invention.

9 illustrates an embodiment in which a request message is retransmitted according to the present invention;

10 illustrates a process of discovering each slave device according to the present invention;

11 illustrates an embodiment of a request message transmitted from a master device to which the present invention is applied.

12 illustrates an embodiment of a response message transmitted from a slave device to which the present invention is applied.

FIG. 13 illustrates an embodiment in which physical IDs of homogeneous slave devices are changed differently according to the present invention.

?? Explanation of symbols for main parts of the drawings

10: digital television 11: set-top box

12: V13 13: DVD recorder

14: receiver 110: jack connector

111: line driver 112: microcomputer

The present invention relates to a method of processing a homogeneous slave device in a device link system based on a television. For example, various types of A / V devices installed in a home are connected based on a digital television. Accordingly, the present invention relates to a method for processing a homogeneous slave device in a television-based device link system for enabling a user to more conveniently control the desired A / V device.

In recent years, digital televisions (D-TVs) capable of outputting and displaying high-definition video and high-quality audio have been widely used and commercialized. For example, digital TVs (VCRs) and DVD recorders (DVDs) are available. -Recorder, and Set Top Box (STB) can be connected.

Meanwhile, the DVD recorder or set-top box may include a hard disk recorder (HDD-Recorder) capable of recording and storing digital data in a large recording medium such as a hard disk (HDD).

In addition, a receiver capable of three-dimensionally outputting high-quality multi-channel (eg, 5.1 CH) audio through a plurality of speakers may be connected to the digital television. The receiver may be connected to a VCD or a DVD. Combi-Home Theater, a combination product that includes a recorder, can be used.

Then, the user selectively controls the devices connected to the digital television to watch analog audio and video played in the VR or digital audio and video played in the DVD recorder, or the set top. Audio and video of the digital broadcast received through the box can be viewed.

In addition, a user may control the combination home theater so that high-quality multi-channel audio is three-dimensionally output through a plurality of speakers, and a video screen displayed through the digital television and a plurality of speakers are output. Multi-channel audio can be heard in three dimensions.

However, in order to control the operation of the V-Cal, DVD recorder, set-top box, and combination home theater connected through a digital television as described above, the user has to operate the remote control of the device, which is inconvenient in use. Of course, the problem that takes a long time to control the operation of the desired device occurs.

Accordingly, the present invention was created to solve the above problems, and for example, various types of slave devices such as V-Cal, DVD recorders, set-top boxes, and receivers installed in homes, using stereo jacks In a daisy chain method, a connection and connection to a master device such as a digital television is generated, and a request message and a response message transmitted and received between the master device and the slave devices are generated and transmitted in an optimized predetermined format. Homogeneous slave device in a television-based device link system for detecting that the presence of a CDMA device and then randomly changing a unique physical ID (PID) assigned to the homogeneous slave device so that a communication error does not occur.To provide a method Lee, it will have its purpose.

A homogeneous slave device processing method in a television-based device link system according to the present invention for achieving the above object, in the master device of the television-based device link system, a request for discovering each slave device Generating and transmitting a message; In each slave device receiving the request message, initializing a unique physical ID assigned to the slave device, generating a response message, and transmitting the response message to the master device; Determining, by the master device, whether a homogeneous slave device exists by referring to a physical ID of each slave device included in the response message; Step 4 of generating a request message requesting a change of a physical ID when the homogeneous slave device exists and transmitting the same to the homogeneous slave device; and step 5 of arbitrarily changing the initialized physical ID in the homogeneous slave device, respectively. Characterized in that comprises a,

The method may further include: generating, at the homogeneous slave device, a response message including a randomly changed physical ID and transmitting the generated response message to the master device; Determining, by the master device, the existence of a homogeneous slave device by referring to a physical ID of each slave device included in the response message; And generating a request message for changing a physical ID when the homogeneous slave device exists and transmitting the same to the homogeneous slave device, and using the changed physical ID when the homogeneous slave device does not exist, It further comprises the eight steps of communicating with the slave device.

Hereinafter, a preferred embodiment of the method of processing a homogeneous slave device in a television based device link system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an overall configuration of a device link system based on a television according to the present invention. For example, a set top box 11, a BC12, Various types of devices, such as the DVD recorder 13, the receiver 14, and the like, are connected to the digital television 10 through an A / V signal line, respectively.

In addition, as shown in FIG. 1, the devices are serially connected and connected to the digital television 10 through a daisy chain type control line. For example, in addition to a plurality of signal input / output ports for transmitting and receiving A / V signals with each device, the digital television 10 includes one stereo jack port for a control line with the set-top box 11. Stereo Jack Port) is provided separately.

Meanwhile, the set top box 11 is provided with two stereo jack ports for a control line with the digital television 10 and a control line with a V-CAL 12. Two stereo jack ports are provided for the control line with the set top box 11 and the control line with the DVD recorder 13.

In addition, the DVD recorder 13 includes two stereo jack ports for a control line with the VRC 12 and a control line with the receiver 14 such as a Combi-Home Theater. The receiver 14 is provided with two stereo jack ports for a control line with the DVD recorder 13 and a control line (unassigned) with any other device.

On the other hand, the stereo jack, for example, as shown in Figure 2, 3.5mm stereo jack mainly used in general personal computer (PC) or earphone, etc. can be used, as described above in a daisy chain method through the stereo jack In addition to a plurality of key buttons for selecting and controlling a television function, the remote controller for operating and controlling a digital television connected to each device operates each device connected in a daisy chain manner. Key buttons for control are additionally assigned.

For example, assuming that the device link system according to the present invention is an 'XLink' system, the remote control includes a key button for turning on / off the TV and the XLink devices, as shown in FIG. Key buttons for providing a graphical user interface (GUI) screen and key buttons for selectively outputting audio output through a TV or a home theater are additionally allocated.

In the set-top box 11 connected to a device connected in a daisy chain manner through a stereo jack, for example, a digital television, which is a master device, and operated as a slave device, as shown in FIG. As shown in the drawing, the jack connector 110, the line driver 111, the microcomputer 112, and the like are included.

On the other hand, the request command received from the digital television 10 via the jack connector 110 of the set top box, via the R1_In / Out terminal of the line driver 111, to the microcomputer 112. At the same time as the input, it is transmitted through the T2_In / Out terminal of the line driver 111 to the VRC 12 connected to the other stereo jack input / output port of the jack connector 110.

On the other hand, when a response command is generated by the microcomputer 112 of the set top box, the response command is input / output of the jack connector 110 via the T1_In / Out terminal of the line driver 111. When a response command is generated from the V12 or the like, the response command is transmitted through the R2_In / Out terminal and the T1_In / Out terminal of the line driver 111. And the digital television 10 connected to the input / output port of the jack connector 110.

In addition, in the digital television 10, for example, when performing a system booting operation, as shown in FIG. 5, a request command (for example, DiscoverDevices) for confirming connection of each slave device is generated. The request command is serially transmitted to the respective devices through a series of daisy chain methods described above with reference to FIG.

Each device that receives the request command generates a corresponding response command (eg, Slave1Res (), Slave2Res () ...), and the response command is a digital television through a daisy chain method. In the digital television, each device currently linked can be identified, and a request message format (transmitted / received) between the digital television operated as the master device and the respective devices operated as the slave device is provided. Request Message Format and Response Message Format are described in detail as follows.

Fig. 6 shows a configuration of a request message format according to the present invention. For example, a request message transmitted from a digital television which is a master device includes a header type and a destination address. A destination address, a source address, a length, a command, and N data blocks 1 to N and checksum information are sequentially recorded.

7 illustrates a configuration of a response message format according to the present invention. For example, a header is included in a response message transmitted from a slave device, a DB recorder, a set-top box, a reserver, and the like. Type (Header Type), Destination Address, Source Address, Length, Command, Response Code, and N Data Blocks (Data Block 1 ~ N) And checksum information are recorded in order.

Meanwhile, when transmitting the request message or the response message, as shown in FIGS. 6 and 7, '0xFF 0xFF' is transmitted first. When a message collision occurs, the slave devices detect the fact. Also, it is used to recover data in which a message transmission error occurs in a digital television which is a master device.

And. The header information indicates a start of a message. In the case of a request message, for example, 5 bits of '10001' for indicating a corresponding message type and 3 bits for indicating a corresponding version. '001' is recorded, and in the case of a response message, a 5-bit '10010' for indicating a corresponding message type and a 3-bit '001' for indicating a corresponding version may be recorded.

In addition, an 8-bit physical ID and a logical ID assigned to the corresponding device to receive the message are recorded in the destination address, and the source address is assigned to the corresponding device transmitting the message. 8-bit physical ID and logical ID are recorded. The physical ID is assigned a unique value for each product type, and the logical ID is included in the corresponding product. Each unit is assigned a unique value.

For example, when the DVD recorder is a combination device including a hard disk recorder (HDD-Recorder) inside the device, the combined product is assigned one physical ID and two logical IDs. When the request message and the response message correspond to each other 1: 1, the destination address and the source address are exchanged with each other, but the request message and the response message, such as the 'DiscoverDevices' command described above with reference to FIG. Since 1: corresponds to N, the destination address and the source address do not change exceptionally.

And, the length information indicates the number of bytes corresponding to the total message length from the header information to the checksum, and the command is a specific command to be transmitted, and the data block corresponds to when additional information is to be transmitted. Information is recorded in a data block and transmitted. Depending on the type of the command, the existence and length of the data block are determined as optional.

On the other hand, in general, information is divided into units of 1 byte, but the data block is classified by a detailed format rather than 1 byte. When an unused lower bit occurs among data blocks, it is filled with '0' and transmitted. In addition, the response code is included only in the response message, and records success or failure of the request message (OK, Error), and the check sum is used to detect a message error, except for the check sum. A specific value is recorded that XORs all remaining message data.

The message transmission method between the master device and the slave devices uses, for example, an RS232C transmission method. The start bit uses '1' and the stop bit uses '0'. The baud rate is 9600bps, and no parity, and a half duplex method is used for communication.

In addition, the LSB First transmission method that first transmits a Least Significant Bit (LSB) is used. As shown in FIG. 8, a slave device receiving a request message transmits a response message within 50 ms, and has a maximum response delay. The time should be less than 200 ms, and as shown in FIG. 9, the master device retransmits when the waiting time for the response exceeds 200 ms after transmitting the request message, wherein the retransmission is repeated one or more times. Done.

In the master device, if a response message is received after transmitting the request message, the master device waits 10 ms or more until the next request message is transmitted, and the internal byte interval of the message is maintained within 5 ms. When the master device receives the standby response RES_WAIT instead of the ok response RES_OK as a response message, the master device informs that the processing speed of the slave device is slow and that the current processing is in progress.

On the other hand, when the master device wants to know the exact completion time, it can repeatedly transmit the same request message later according to the processing criteria, and finally the slave device responds with an OK response (RES_OK), and wait response (RES_WAIT). The master device, for example, displays a user interface message similar to 'during XLink communication', so that the user can know the processing delay.

In the master device, if only the standby response WAIT_RES is continuously received for 1 s without the ok response RES_OK, the slave device treats the error as an error of the slave device and stops the communication, even after retransmitting the request message. If not, it is determined that there is no device, and outputs a corresponding guide screen so that the user can know.

Meanwhile, as shown in FIG. 10, when the master device generates and transmits a request message for discovering each slave device, each slave device that receives the request message has a unique physical assigned to itself. After initializing the ID, a response message is sent to the master device.

For example, as shown in FIG. 11, in the master device, a physical ID (eg, Physical_ALL) and a logical ID representing the entire slave device in a destination address of a request message for discovering each slave device (DiscoverDevice). (Eg Logical_ALL).

As shown in FIG. 12, each slave device initializes the lower 3 bits of the unique physical ID assigned to itself to '000', and then records the physical ID in the source address of the response message. In this case, the response message generated by the slave device of the same type, for example, the first DVD player and the second device player, respectively, has the same physical ID (eg XXXXX000) in which the lower 3 bits are initialized to '000'. Is recorded.

On the other hand, in the response message generated by another type of slave device, for example V-Cal, a unique physical ID (eg, YYYYY000) in which the lower 3 bits are initialized to '000' is recorded. By comparing the physical IDs recorded in the source address of the response message received through the above-described process, if there is a physical ID having the same value, it is determined that the same slave device exists.

Meanwhile, as illustrated in FIG. 13, the master device generates a request message for differently changing (ChangePID) a physical ID (for example, XXXXX000) initialized with the same value to the same slave device, thereby generating the same slave device. The same slave device receiving the same, for example, the first DVD player and the second DVD player, randomly change the values of the same physical IDs assigned to them.

Also, a response message including the physically changed physical IDs is generated and transmitted to the master device, and the master device, as described above, receives a response received from the first DVD player and the second DVD player, respectively. The physical ID of the source address included in the message is searched and compared.

When the comparison result has a different value, the respective slave devices are separately controlled using their respective physical IDs. If the comparison result has the same value, in the master device, As described above, a request message for changing the physical ID differently (ChangePID) is generated, and the operation of transmitting to the homogeneous slave device is repeated.

Accordingly, by changing the unique physical ID (PID) assigned to the same slave device differently, it is possible to prevent the communication error from occurring due to the same slave device.

Or more, preferred embodiments of the present invention described above, for the purpose of illustration, those skilled in the art, within the technical spirit and the technical scope of the present invention disclosed in the appended claims below, to further improve various other embodiments Changes, substitutions or additions will be possible.

The homogeneous slave device processing method in the television-based device link system according to the present invention constructed and constructed as described above may be, for example, various types of VRCs, DVD recorders, set-top boxes, and receivers installed in homes. Connect and connect slave devices to a master device such as a digital television in a daisy chain manner using a stereo jack, and request and response messages transmitted and received between the master device and the slave devices. By generating and transmitting a message in an optimized predetermined format, detecting whether there is a homogeneous slave device, and then randomly changing a unique physical ID (PID) assigned to the homogeneous slave device. Loin Are able to prevent in advance that the communication error has occurred, is extremely useful inventions which allow a user to more conveniently and the operation control accurately the desired specific device.

Claims (8)

At a master device of a television-based device link system, generating and transmitting a request message for discovering respective slave devices; In each slave device receiving the request message, initializing a unique physical ID assigned to the slave device, generating a response message, and transmitting the response message to the master device; Determining, by the master device, whether a homogeneous slave device exists by referring to a physical ID of each slave device included in the response message; Step 4 of generating a request message requesting a change of a physical ID and transmitting the same to the peer slave device when the peer slave device exists; and And in the homogeneous slave device, a step of arbitrarily changing the initialized physical ID, respectively. The method of claim 1, In step 1, a physical ID and a logical ID representing the entire slave device are recorded in a destination address included in a request message for discovering each slave device. Homogeneous slave device processing method. The method of claim 1, In the second step, in each slave device receiving the request message, after initializing the lower 3 bits of the physical ID assigned to itself to '0', the slave device writes the physical ID to the source address included in the response message. A method for processing homogeneous slave devices in a television based device link system. The method of claim 1, In step 3, when the master device has the same value with reference to the physical ID of each slave device included in the response message, it is determined that a homogeneous slave device exists. The method of claim 1, In step 4, when the homogeneous slave device exists, the television-based device records the physical ID of the homogeneous slave device in the destination address included in the request message requesting the physical ID change. Method of handling homogeneous slave device in link system. The method of claim 1, In step 5, the homogeneous slave device processing method of the television-based device link system, characterized in that, in the homogeneous slave device, the initialized physical ID is respectively changed to an arbitrary value irrelevant to each other. The method of claim 1, Generating, at the homogeneous slave device, a response message including a randomly changed physical ID and transmitting the generated response message to the master device; And In the master device, further comprising the step of determining the existence of the homogeneous slave device by referring to the physical ID of each slave device included in the response message in the device link system based on the television, characterized in that Homogeneous slave device processing method. The method of claim 7, wherein When the homogeneous slave device exists, a request message for changing the physical ID is generated and transmitted to the homogeneous slave device, and when the homogeneous slave device does not exist, the homogeneous slave using the changed physical ID 8. The method of claim 1, further comprising communicating with the device.

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