KR20010018893A - method for controlling connection between nodes in digital interface - Google Patents

Abstract

PURPOSE: A method for controlling device connection of a digital interface is provided so that a data stream of a specific program can be smoothly transmitted, received, reproduced and controlled by embodying point-to-point connection or broadcast connection between devices. CONSTITUTION: According to the user's request, the first device which is a master device having a display transmits a connection command having a predetermined format for determining a second device as a master device and transmitting a data stream. According to the connection command from the first device, the second device becomes the master device, and receives a channel and bandwidth from an isochronous resource manager. Thereafter, the first and second devices are point-to-point connected to transmit the data stream. Here, the connection command having the predetermined format includes a subfunction region for notifying the point-to-point connection or broadcast connection, a connection region for deciding connection or disconnection, a source node ID region for notifying a source node ID of the device transmitting the data stream, and a destination node ID region for notifying a destination node ID of the device receiving the data stream.

Description

Method for controlling connection between nodes in digital interface}

The present invention relates to a digital interface, and more particularly, to a method for controlling connection between devices of a digital interface.

Hereinafter, a method for controlling connection between devices of a digital interface according to the prior art will be described with reference to the accompanying drawings.

1 is a diagram illustrating an example of a device-to-device connection state of a 1394 system according to the prior art, according to a control signal of an application node (not shown) for connection information between devices connected to a 1394 serial bus 10. Between a first audio / video node 20 including first and second input plug control registers 21 and 22 and a first input master plug register 23 to input and output a device connected to the 1394 serial bus 10; A second audio / video node 30 including a third input plug control register 31 and a second input master plug register 32 for inputting / outputting connection information of the terminal according to a control signal of an application node. And a fourth input plug control register 41 and a third input master plug that input and output connection information between devices connected to the 1394 serial bus 10 according to a control signal of an application node. Fifth and fifth input and output connection information between a third audio / video node 40 including a register 42 and a device connected to the 1394 serial bus 10 according to a control signal of an application node. Application information for connection information between a fourth audio / video node 50 including six plug control registers 51 and 52 and a fourth input master plug register 53 and a device connected to the 1394 serial bus 10. And a fifth audio / video node 60 composed of an output plug control register 61 and an output master plug register 62 for inputting and outputting according to a control signal of a node.

A method of controlling connection between devices of a digital interface according to the related art configured as described above will be described in detail with reference to the accompanying drawings.

First, an application node is a point-to-point connection or a broadcast connection from the fifth audio / video node 60 to the first audio / video node 20. After receiving a channel for transmitting isochronous data over a broadcast connection, an output plug control register in the fifth audio / video node 60 and in the first audio / video node 20 The input plug control register is written in the output plug control register 61 and the second input plug control register 22 in the same format.

An application node is then on-line of the output plug control register 61 in the fifth audio / video node 60 to transmit the isochronous data. Writes "1" to the bit and the on-line bit of the second input plug control register 22;

In addition, an application node may be a point-to-point connection counter or a broadcast connection of the output plug control register 61 in the fifth audio / video node 60. Write to the broadcast connection counter.

Then, isochronous data is transmitted from the fifth audio / video node 60 to the first audio / video node 20 through the channel.

Through the above process, isochronous data transmission is performed from the fifth audio / video node 60 to the second and fourth audio / video nodes 30 and 40.

However, in the method for controlling the connection between devices of the digital interface according to the prior art, there is a problem in that the data stream of a predetermined program cannot be transmitted / received, played back and controlled smoothly because a command for connecting devices to the digital interface is not prepared.

Accordingly, the present invention has been made to solve the above problems, a point-to-point connection with another device by using the other device as a master from one device that is a master between the devices connected by a digital interface (Point-To-Point) It is an object of the present invention to provide a method for controlling connection between devices of a digital interface for controlling a connection or a broadcast connection.

1 is a view showing an example of a connection state between devices of a 1394 system according to the prior art;

2 is a diagram illustrating an embodiment of a system configuration to which a method for controlling access between devices of a digital interface according to the present invention is applied;

3A and 3B illustrate an embodiment of a connection command format according to a device-to-device connection control method of a digital interface according to the present invention.

A feature of the device-to-device connection control method of the digital interface according to the present invention for achieving the above object is to transmit a data stream using the second device as a master according to the user's selection in the first device, which is a master having a display device. Transmitting a connection command of a predetermined format for the second communication device; and according to the transmitted connection command of the predetermined format, the second device becomes a master from an isochronous resource manager (IRM). And after the channel and the band whiskey have been allocated, performing a point-to-point connection between the second device and the first device to transmit a data stream.

The connection command of the predetermined format may include a subfunction area indicating whether a point-to-point connection or a broadcast connection, a connection area indicating whether to make or disconnect the connection, and a data stream. Another feature is a source node ID region indicating a source node ID of a device and a destination node ID region indicating a destination node ID for receiving a data stream.

The subfunction area is another feature that it is possible to transmit a data stream by connecting to a different device from the second device to the first device by setting up a broadcast connection.

In the data stream transmission step, the second device transmits a response of a predetermined format corresponding to a connection command of the predetermined format to the first device.

The response is characterized in that the format is the same as that of the connection command.

The format of the response is a bandwidth range indicating a bandwidth assigned by the source node and a source channel number indicating a source channel number assigned by the source node. An output plug control register number area indicating an area, an output plug control register number of the source node, and a destination channel number of a destination node for transmitting the data stream; A destination channel number region indicating a number, and an input plug control register number region indicating an input plug control register number of the destination node. Another feature is that

A connection command of a predetermined format for transmitting a data stream by performing a point-to-point connection to a third device using the second device as a master according to a user's selection in the first device having the display device. ) And a channel and bandwidth are allocated from the isochronous resource manager in the second device, and then a point-to-point connection between the second device and the third device is performed to establish a data stream. Another feature is that it is possible to transmit.

The present invention controls a point-to-point connection or a broadcast connection with another device by using another device as a master as a master between devices connected by a digital interface. By doing so, it is possible to smoothly transmit, receive, reproduce, and control a data stream of a predetermined program.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, a preferred embodiment of a method for controlling connection between devices of a digital interface according to the present invention will be described with reference to the accompanying drawings.

2 is a view showing an embodiment of a system configuration applied to a method for controlling inter-device connection of a digital interface according to the present invention. The DTV 101, STB 102, and DVD Player (connected to each other by an IEEE 1394 cable) are illustrated in FIG. 103 and the disk 104. As shown in FIG.

3A and 3B illustrate an embodiment of a connection command format according to a device-to-device connection control method of a digital interface according to the present invention. The connection command is shown in FIG. Subfunction area indicating whether it is a point-to-point connection or a broadcast connection, a connection area indicating whether to make or disconnect the connection, and a source node ID (Source Node_ID) of the device transmitting the data stream. A source node ID area indicating the source node, a destination node ID area indicating the destination node ID receiving the data stream, and a bandwidth allocated by the source node. Bandwidth area indicated and the source channel number So assigned by the source node. a source channel number area representing an urce channel number, an output plug control register number area representing an output plug control register number of the source node, and the data stream. A destination channel number area indicating a destination channel number of a destination node for receiving and an input plug control indicating an input plug control register number of the destination node. It consists of a register number (Input PCR Number) area, the subfunction (Subfunction) of Figure 3a is shown in detail in Figure 3b.

Referring to the accompanying drawings, a method for controlling connection between devices of a digital interface according to the present invention configured as described above will be described in detail as follows.

First, when the user selects the DTV 101 and STB 102 displayed on the screen to watch a predetermined program received from the STB 102 through the IEEE 1394 cable as shown in FIG. 2, the DTV 101 is displayed. ) Transmits a connection command of a predetermined format as shown in FIGS. 3A and 3B to the STB 102 to transmit a data stream using the STB 102 as a master.

That is, the DTV 101 writes "Ox01" in the subfunction area of the connection command as shown in FIGS. 3A and 3B to make a point-to-point connection and "Ox00" in the connection area. In order to establish a connection, the node ID of the STB 102 is recorded in the source node ID area, and its node ID is recorded in the destination node ID area, and then transmitted to the STB 102.

Node IDs (Node_ID) of the devices displayed on the screen are connected to the IEEE 1394 cable and stored in the DTV 101 at power on or bus reset.

Then, the STB 102 transmits a response corresponding to the connection command to the DTV 101 according to the connection command transmitted from the DTV 101.

Here, the STB 102 may transmit a command identical to the connection command to the response.

In addition, the STB 102 assigns a bandwidth allocated from the isochronous resource manager to a bandwidth in the bandwidth area and the isochronous in the source channel number area in response to the response. The channel number allocated from the resource manager is assigned to its output plug control register number in the output plug control register number area, and the channel assigned to the destination channel number area is assigned to the output plug control register number. The number may be additionally recorded in the connection command by the input plug control register number of the DTV 101 in the input plug control register number area and transmitted to the connection command. have.

Subsequently, the STB 102 receives a channel and band whiskey from the isochronous resource manager (not shown), and then outputs its own output plug control register as shown in FIG. 1 and an input plug control register of the DTV 101. After setting the point-to-point connection, the data stream of the received predetermined program is transmitted to the DTV 101 and displayed on the screen.

Here, the DTV 101 records and transmits "Ox10", which means a broadcast connection, in the subfunction area of the connection command, so that not only the DTV 101 itself but also the DTV 101 can receive the data. Another device configured to be connected to an IEEE 1394 cable may broadcast the data stream of the received predetermined program.

After the display is completed, the DTV 101 records a point-to-point connection by recording "Ox01" in the subfunction area of the connection command and connects by writing "Ox10" in the connection area. The node ID of the STB 102 is recorded in the source node ID area, and the node ID of the STB 102 is recorded in the destination node ID area and transmitted to the STB 102. Or you can disconnect the broadcast.

Also, as shown in FIG. 2, a data stream of a predetermined program being watched on the disc 104 among the DTV 101, STB 102, and DVD Player 103 displayed on the screen is stored on the disc 104. When the DVD Player 103 is selected for storage, the DTV 101 sets a connection command of a predetermined format as shown in FIGS. 3A and 3B to store the data stream using the DVD Player 103 as a master. Connection Command) is transmitted to the DVD player 103.

That is, the DTV 101 writes "Ox01" in the subfunction area of the connection command as shown in FIGS. 3A and 3B to make a point-to-point connection and "Ox00" in the connection area. The node ID of the DTV 101 is recorded in the source node ID area, and the node ID of the DVD player 103 is recorded in the destination node ID area. To send.

Node IDs (Node_ID) of the devices displayed on the screen are connected to the IEEE 1394 cable and stored in the DTV 101 at power on or bus reset.

The DVD player 103 then transmits a response corresponding to the connection command to the DTV 101 according to the connection command transmitted from the DTV 101.

Here, the DVD player 103 may transmit a command identical to the connection command to the response.

In addition, the DVD player 103 transmits the bandwidth allocated from the isochronous resource manager to the bandwidth in the bandwidth and the isochrome in the source channel number area. The channel number allocated from the NUS resource manager is stored in the output plug control register number (Output PCR Number) area, and the output plug control register number (Output PCR Number) of the DTV 101 is stored in the destination channel number area. The channel number allocated from the isochronous resource manager is additionally recorded in the connection command by inputting its own input plug control register number into the connection command in the input plug control register number area. It may also transmit to the DTV 101.

The DVD player 103 is then assigned with a channel and band whiskey from the isochronous resource manager (not shown), and then its input plug control register as shown in FIG. 1 and the output plug control register of the DTV 101. Is set as a point-to-point connection, through which the data stream output from the DTV 101 is received and stored in the disk 104.

Here, the DTV 101 records and transmits "Ox10", which means a broadcast connection, in the subfunction area of the connection command, thereby transmitting not only the DVD player 103 but also the IEEE 1394 cable. The data stream of the predetermined program being watched may be broadcasted to another device connected to the device.

After the display is completed, the DTV 101 records a point-to-point connection by recording "Ox01" in the subfunction area of the connection command and connects by writing "Ox10" in the connection area. The node ID of the DTV 101 is recorded in the source node ID area, and the node ID of the DVD player 103 is recorded in the destination node ID area and then transmitted to the DVD player 103. You can release either a two-point connection or a broadcast connection.

Also, as shown in FIG. 2, a user can select a data stream of a predetermined program received from the STB 102 through an IEEE 1394 cable among the DTV 101, STB 102, and DVD Player 103 displayed on the screen. When the STB 102 is selected for storage on the disc 104, the DTV 101 stores the data stream of a predetermined program received with the STB 102 as a master, as shown in FIGS. 3A and 3B. A connection command of a predetermined format as described above is transmitted to the STB 102.

That is, the DTV 101 writes "Ox01" in the subfunction area of the connection command as shown in FIGS. 3A and 3B to make a point-to-point connection and "Ox00" in the connection area. The node ID of the STB 102 is recorded in the source node ID area, and the node ID of the DVD player 103 is recorded in the destination node ID area. send.

Node IDs (Node_ID) of the devices displayed on the screen are connected to the IEEE 1394 cable and stored in the DTV 101 at power on or bus reset.

Then, the STB 102 transmits a response corresponding to the connection command to the DTV 101 according to the connection command transmitted from the DTV 101.

Here, the STB 102 may transmit a command identical to the connection command to the response.

In addition, the STB 102 assigns a bandwidth allocated from the isochronous resource manager to a bandwidth in the bandwidth area and the isochronous in the source channel number area in response to the response. The channel number allocated from the resource manager is assigned to its output plug control register number in the output plug control register number area, and the channel assigned to the destination channel number area is assigned to the output plug control register number. The number is further recorded in the input plug control register number (Input PCR Number) area of the DVD player 103 in the input plug control register number (Input PCR Number) to the connection command and transmitted to the DTV 101. It may be.

Subsequently, the STB 102 receives a channel and band whiskey from the isochronous resource manager (not shown), and then outputs its own control plug control register as shown in FIG. 1 and an input plug control register of the DVD player 103. Is set as a point-to-point connection and then the data stream of the received predetermined program is transmitted to the DVD Player 103 through the point-to-point connection.

The DVD player 103 then stores the data stream of the predetermined program transmitted from the STB 102 via a point-to-point connection on the disc 104.

Here, the DTV 101 records and transmits a data stream of a predetermined program received from the STB 102 by recording and transmitting "Ox10", which means a broadcast connection, in a subfunction area of the connection command. Not only can it be stored on the disc 104 via the DVD Player 103, but it can also be broadcast to other devices connected to the IEEE 1394 cable.

After the display is completed, the DTV 101 records a point-to-point connection by recording "Ox01" in the subfunction area of the connection command and connects by writing "Ox10" in the connection area. The node ID of the STB 102 is recorded in the source node ID area, and the node ID of the DVD player 103 is recorded in the destination node ID area and then transmitted to the STB 102. The two-point connection or the broadcast connection can be released.

On the other hand, as shown in FIG. 2, the user selects the DVD player 103 from among the DTV 1, STB 102, and DVD Player 103 displayed on the screen as a data stream of a predetermined program stored on the disc 104. FIG. When the DVD player 103 is selected for playback through the DTV 101 and the DTV 101 is selected, the DTV 101 sets the data stream of a predetermined program stored in the disc 104 using the DVD player 103 as a master. In order to reproduce and transmit the same to the DTV 101 itself, a connection command of a predetermined format as shown in FIGS. 3A and 3B is transmitted to the DVD player 103.

That is, as shown in FIGS. 3A and 3B, the DTV 101 writes "Ox01" in the subfunction area of the connection command to establish a point-to-point connection and the "Ox00" in the connection area. Record the node ID of the DVD Player 103 in the source node ID area and record the node ID of the DVD player 103 in the destination node ID and transmits the node ID to the DVD player 103. .

Node IDs (Node_ID) of the devices displayed on the screen are connected to the IEEE 1394 cable and stored in the DTV 101 at power on or bus reset.

The DVD player 103 then transmits a response corresponding to the connection command to the DTV 101 according to the connection command transmitted from the DTV 101.

Here, the DVD player 103 may transmit a command identical to the connection command to the response.

In addition, the DVD player 103 transmits the bandwidth allocated from the isochronous resource manager to the bandwidth area by the response, and the bandwidth to the source channel number area. The channel number allocated from the Kronus resource manager, the output plug control register number thereof in the output plug control register number area, and the channel number assigned in the destination channel number area, The input plug control register number of the DTV 101 may be additionally recorded in the connection command in the input plug control register number area and transmitted to the connection command.

The DVD player 103 is then assigned a channel and band whistle from the isochronous resource manager and then point-to-points its own output plug control register as shown in FIG. 1 and the input plug control register of the DTV 101. After setting the point connection, the data stream of the predetermined program stored in the disk 104 is reproduced and transmitted to the DTV 101.

The DTV 101 then displays on the screen a data stream of a predetermined program transmitted from the DVD Player 103 via a point-to-point connection.

In addition, the DTV 101 records and transmits "Ox10", which means a broadcast connection, in a subfunction area of the connection command, and is reproduced from the DVD Player 103, and is programmed. In addition to displaying the data stream on the screen, it can also be broadcast to other display devices connected to the IEEE 1394 cable.

After the display is completed, the DTV 101 records a point-to-point connection by recording "Ox01" in the subfunction area of the connection command and connects by writing "Ox10" in the connection area. The node ID of the DVD player 103 is recorded in the source node ID area, and the node ID of the DVD player 103 is recorded in the destination node ID and transmitted to the DVD player 103. You can disconnect the connection or the broadcast.

As described above, the method for controlling the connection between devices of the digital interface according to the present invention is a point-to-point connection with another device by using another device as a master from one device that is a master between devices configured as digital interfaces. By controlling the point connection or the broadcast connection, there is an effect that the data stream of a predetermined program can be transmitted, received, played back and controlled smoothly.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (7)

Transmitting a connection command of a predetermined format for transmitting a data stream using the second device as a master according to a user's selection in a first device having a display device; According to the transmitted connection command of the predetermined format, the second device becomes a master and receives a channel and a band whistle from an isochronous resource manager (IRM), and then the second device and the first device. And performing a point-to-point connection to transmit a data stream. The method of claim 1, The connection command of the predetermined format is Subfunction area indicating whether it is a point-to-point connection or a broadcast connection, a connection area indicating whether to make or disconnect the connection, and a source node ID area indicating a source node ID of the device transmitting the data stream. And a destination node ID (Destination Node_ID) area indicating a destination node ID for receiving the data stream. The method of claim 2, And setting the subfunction area to a broadcast connection, and then performing a broadcast connection from the second device to the first device and the other device to transmit a data stream. The method of claim 1, And transmitting a response of a predetermined format corresponding to a connection command of the predetermined format to the first device in the data stream transmission step. The method of claim 4, wherein The format of the response is the same as the format of the connection command (Connection Command), the device-to-device connection control method of the digital interface. The method of claim 5, The format of the response is A bandwidth indicating a bandwidth assigned by a source node, a source channel number indicating a source channel number assigned by the source node, and an output plug control register number of the source node An output plug control register number area, a destination channel number area in which a destination node for receiving the data stream indicates a destination channel number, and an input plug control register of the destination node. And an input plug control register number area indicating a number. The method of claim 1, The first device having the display device transmits a connection command of a predetermined format for transmitting a data stream to the third device by using the second device as a master according to a user's selection, and then converting the data to the isochronous device in the second device. Digital interface, characterized in that after the channel (band) and bandwidth (Widewidth) is allocated from the resource manager to perform a point-to-point connection between the second device itself and the third device to transmit a data stream Method of controlling connection between devices.