KR100561388B1 - Method for managing connection of digital interface - Google Patents

Abstract

Disclosed is a connection management method between digital devices connected through a digital interface such as IEEE1394. According to an embodiment of the present invention, the sink digital device stores the connection state and periodically monitors the presence or absence of a device accessing a bitstream transmitted through the stored connection among digital devices connected to the digital interface network. In the process, if the sink digital device finds a digital device that accesses the bitstream, the step includes requesting the bitstream transmission control to the source digital device, and between the digital devices through a digital interface such as IEEE 1394. When a connection is established, the user of the existing connection can effectively control the access of other third-party digital devices to the special or private bit streams being transmitted over the connection.

Description

Method for managing connection of digital interface

1 illustrates a digital interface connection management method according to the prior art.

FIG. 2A is a detailed view of the oPCR of device 1 of FIG. 1.

FIG. 2B is a detailed view of iPCR of device 2 of FIG. 1.

3 is a block diagram illustrating digital interface connection management according to the present invention.

4 is a flowchart illustrating digital interface connection management according to the present invention.

The present invention relates to a digital interface connection management method, and more particularly, to a connection management method between digital devices connected through a digital interface such as IEEE1394.

Digital devices such as digital TVs, digital VCRs, and digital set-top boxes are emerging, and IEEE 1394, a network that allows these digital devices to interface with each other, is introduced (see IEEE1394-1995 High Performance Serial Bus, IEC 61883, etc.). ).

In systems where multiple digital devices are interconnected through digital interfaces such as IEEE 1394, the IEC61883 standard specifies connection management between these digital devices. The IEC61883 standard defines an input plug and an output plug as an inlet and an outlet for a bitstream for each digital device, and also includes an output master plug register (oMPR) contained within each digital device. ) manages input and output plugs to manage connection between digital devices by managing output plug control registers (oPCRs), input master plug registers (iMPRs), and input plug control registers (iPCRs).

There are two types of connection between digital devices: point-to-point connection and broadcast connection. A point-to-point connection is a connection consisting of an output plug, an input plug, and these different channels so that any digital device can establish / overlay the connection and establish the connection. One device is responsible for all the management of the connection. A broadcast connection is divided into a broadcast-in connection and a broadcast-out connection. The broadcast connection is a connection between an input plug and a channel, and the broadcast connection is a connection between an output plug and a channel. Connection. The broadcast connection can only be established by the device that actually inputs and outputs the bitstream by this connection, and the release of the connection can be established by any device on the network. All management, including the establishment or release of point-to-point and brocast connections, uses the iMPR, oMPR, iPCR, and oPCR registers.

1 illustrates a digital interface connection management method according to the prior art.

Device 1 110 is called the source device (e.g. DVCR), Device 2 120 is called the sink device (e.g. DTV), and Device 3 130 is called another sink device (e.g. DTV).

When device 1 110 and device 2 120 are connected through a point-to-point connection, the content of oPCR of device 1 110 is oPCR.P-2-P_Connection_Counter = 1, oPCR.Channel_Number = 33, The contents of the iPCR of 2 120 are iPCR.P-2-P_Connection_Counter = 1 and iPCR.Channel_Number = 33.

Accordingly, according to the information setting, the IEEE 1394 module is controlled between the device 1110 and the device 2 120 so that the device 2 120 can receive the output contents of the device 1110.

At this time, if the connection between the device 1 (110) and the device 2 (120) is set, if the third party device 3 (130) wants to see the current output of the device 1 (110) device 3 (130) is currently set The point-to-point connection between the device 1 110 and the device 2 120 is overlaid to establish a point-to-point connection or a broadcast-in connection. When the point-to-point connection between the device 3 130 and the device 1 110 is set to overlap, the content of oPCR of the device 1 110 is oPCR.P-2-P_Connection_Counter = 2, oPCR.Channel_Number = 33, and the device The contents of iPCR of 3 130 are iPCR.P-2-P_Connection_Counter = 1 and iPCR.Channel_Number = 33.

Accordingly, as shown in FIG. 1, the IEEE 1394 module is controlled between the device 3 130 and the device 1 110 so that the device 3 130 may receive the output contents of the device 1 110.

However, in the related art, a third party device 3 130 uses the bit stream in a state in which a point-to-point connection or a broadcast connection exists between the device 1 110 and the device 2 120. If you want to access it, there is no way for you to control it. For example, if device 1 (110) and device 2 (120) are DVCR and DTV in the parent's room and device 3 (130) is the DTV in the child's room, the children control access to the bitstream contents of the VCR watched by their parents. Can not. Therefore, in the related art, the connection between the digital devices is not private and a third party device may access randomly.

The technical problem to be achieved by the present invention is to periodically check whether a sink device is accessing a bitstream transmitted by another sink device through this connection while a connection is established between digital devices through a digital interface such as IEEE 1394. Therefore, the present invention provides a method of managing connection of a digital interface requiring a source device to control bitstream transmission.

In order to solve the above technical problem, the present invention provides a connection management method of a digital interface for controlling the access of another digital device while the digital device for the source and the sink digital device is connected by a digital interface,

Periodically monitoring the presence of a digital device storing the connection state by the sink digital device and accessing a bitstream transmitted through the stored connection among digital devices connected to the digital interface network. ;

If the sink digital device finds a digital device that accesses the bitstream in the above process, the step of requesting the bitstream transmission control to the source digital device is a connection management method.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a block diagram illustrating digital interface connection management according to the present invention.

Referring to FIG. 3, device 1 310, device 2 320, and device 3 330 are connected to an IEEE 1394 bus. Device 1 310 is called a source device (e.g. DVCR), Device 2 320 is called a sink device (e.g. DTV), and Device 3 330 is a different sink device (e.g. DTV in another room). Assume that device 4 340 is another sink device (e.g., another room DTV), and device 5 350 is another sink device (e.g., another room DTV). The device 1 310 is connected between the device 2 320 and the device 2 320 receives the output bit stream of the device 1 310 and displays it on the screen. The connection between the device 1 310 and the device 2 320 may be a point-to-point connection or a broadcast-out / broadcast-in connection. The device 2 320 monitors the device 3 330, the device 4 340, and the device 5 350 to check whether the device 1 310 transmits a bitstream access.

The flowchart of FIG. 4 will be described with reference to FIG. 3.

First, a point-to-point or broadcast connection is established between the source device 1 310 and the sink device 2 320 in step 410.

For example, when the connection between the device 1 310 and the device 2 320 is established through the point-to-point connection, the content of the oPCR of the device 1 310 is oPCR.P-2-P_Connection_Counter = 1, oPCR.Channel_Number = 33, iPCR contents of the device 2 320 are iPCR.P-2-P_Connection_Counter = 1 and iPCR.Channel_Number = 33.

At this time, if the device 3 (330) wants to see the current output of the device 1 (310) while the connection between the device 1 (310) and the device 2 (320) is established, the device 3 (330) is currently set device 1 The point-to-point connection between the 310 and the device 2 320 is overlaid to establish a point-to-point connection or a broadcast-in connection. Therefore, when the point-to-point connection between the device 3 330 and the device 1 310 is set to overlap, the content of oPCR of the device 1 310 is oPCR.P-2-P_Connection_Counter = 2, oPCR.Channel_Number = 33, The contents of iPCR of device 3 330 are iPCR.P-2-P_Connection_Counter = 1 and iPCR.Channel_Number = 33.

If the broadcast-in connection is overlapped between the device 3 330 and the device 1 310, the contents of the oPCR of the device 1 310 are oPCR.P-2-P_Connection_Counter = 1 and oPCR.Broadcast_Connection_Counter = 1. , oPCR._Channel_Number = 33, iPCR contents of the device 3 (330) is iPCR.Broastcast_Connection_Counter = 1, iPCR.Channel_Number = 33.

In the state in which the connection between the device 1 310 and the device 2 320 is performed in step 420, the user may use a remote control operation to prevent other third parties from accessing the bitstream transmitted through this connection. Select an option.

If the user selects the option that the bitstream is special content in step 430, the device 2 320 monitors the device 3 330, the device 4 340, and the device 5 350 while the connection is stored.

For example, assuming that the channel number used between the device 1 310 and the device 2 320 is 33, the connection between the device 1 310 and the device 2 320 may be point-to-point or broadcast-out / Regardless of the broadcast-in, the channel number 33 to be used is written in the Channel_Number field of the oPCR of the device 1 310 and the Channel_Number field of the iPCR of the device 2 320. The device 2 320 recognizes that the third party devices (eg, device 3, device 4, and device 5) do not arbitrarily access the contents of the bitstream transmitted through the channel 33. Periodically or at an appropriate time point, it is checked whether third-party devices on the current digital interface network are accessing this channel number. To this end, the device 2 320 examines the Channel_Number field included in the iPCR of the device 3 330, the device 4 340, and the device 5 350, which are third party devices. In this case, the device 2 320 may inspect all devices currently present on the digital interface network or only devices that can operate for a sink.

In operation 440, the device 2 320 determines whether there is a device that is accessing (or attempts to access) the channel number 33 currently managed among other devices (device 3, device 4, and device 5).

If it is recognized in step 450 that there is a device accessing (or attempting to access) the channel number 33, one of the following listed operations or any combination of these operations is performed. That is, the first action is to notify the original user that the device exists (and possibly information about that device) to device 1 310, and the second action is a special reason for device 1 310. The third operation is to send a message requesting a quick channel stop because it is a special management channel for the newly accessed user. The fourth operation is for a new sink device. For special reasons, it is sending a command to stop receiving the bitstream.

As described above, according to the present invention, when a connection is established between digital devices through a digital interface such as IEEE 1394, a user of an existing connection may use a special or private bit stream transmitted through the connection. Access to other third party digital devices can be monitored and controlled effectively.

Claims (4)

In the connection management method of the digital interface for controlling the access of other digital devices while the digital device for the source and the digital device for the sink is connected to the digital interface, Periodically monitoring, by the sink digital device, whether the device accesses the bitstream transmitted through the stored connection among the digital devices connected to the digital interface network; And if the sink digital device discovers a digital device that accesses the bitstream, requesting the source digital device to control the bitstream transmission. The method of claim 1, wherein the monitoring process is a process in which the sink digital device checks a channel number recorded in a channel number field of an input plug control register (iPCR) of another digital device. The method of claim 1, further comprising the step of the sink digital device monitoring other devices when an option is selected by the user that the content of the bitstream is special. The method of claim 1, wherein the connection of the digital interface is applied in the IEEE 1394 interface standard.

Images