KR100304898B1 - method for controlling connection between nodes in digital interface - Google Patents

Abstract

It is to provide a method of controlling access between devices in a digital interface so that contents of contents data as well as on screen display data between devices connected by a digital interface can be transmitted without damage. A method for controlling device-to-device connection of a digital interface having a plurality of connected devices, the method comprising: performing asynchronous connection with a second device selected by a user from a first device having a display device when a user selects a device; Receiving a display data (On Screen Display data), and when the completion of the asynchronous connection (secondary connection) is completed, the second device is a master and is assigned a channel and band whis from an isochronous resource manager (isochronous resource manager) After child And transmitting content data such as an MPEG stream by performing an isochronous connection, and performing an asynchronous connection when the devices connected to the digital interface are connected. By performing an isochronous connection afterwards, on screen display data and contents of content data can be delivered without damage.

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 control plug register 61 and the second input control plug register 22 in the same format.

That is, an application node is on-line of the output plug control register 61 in the fifth audio / video node 60 to transmit the isochronous data. Write a '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 broadcastconnection 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 of controlling the connection between devices of the digital interface according to the prior art, the devices are connected to each other by a digital interface to deliver content data such as on screen display data and MPEG stream. Since no specific method is specified, when connecting or disconnecting devices in different ways, the connection and disconnection are not smooth. There is a problem that can not pass the data itself.

Accordingly, the present invention has been made to solve the above problems, and is intended to deliver on-screen display data (Contents data) as well as contents of content data (damage) without damage between devices connected via a digital interface It is an object of the present invention to provide a method for controlling connection between devices of a digital interface.

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

2A and 2C are diagrams 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 a process of performing and releasing an Asynchronous Connection applied to a method for controlling device-to-device connection of a digital interface according to the present invention.

4A and 4B are views illustrating formats of an input / output plug control register applied to a method for controlling inter-device connection of a digital interface according to the present invention.

5 is a flowchart illustrating an embodiment of a method for controlling connection between devices in a digital interface according to the present invention.

6 is a flowchart illustrating another embodiment of a method for controlling connection between devices of a digital interface according to the present invention.

7 is a flowchart illustrating still another embodiment of a method for controlling connection between devices in a digital interface according to the present invention.

Another feature of the device-to-device connection control method of the digital interface according to the present invention for achieving the above object, in the device-to-device connection control method of the digital interface having a plurality of devices connected to the digital interface, when selecting a user device Performing an asynchronous connection with the second device selected by the user in the first device having the display device to receive On Screen Display data; and performing the asynchronous connection. Upon completion, the second device becomes a master, receives a channel and band whistle from an isochronous resource manager, and performs isochronous connection to perform content data such as an MPEG stream. This step, including sending There makin word.

The isochronous connection is another point-to-point connection.

Another feature of the device-to-device connection control method of the digital interface according to the present invention for achieving the above object is a device-to-device connection of the digital interface consisting of a first device having a display device and a second device that is a receiving device connected to the digital interface A control method comprising: recognizing and displaying on a screen a device configured to be connected to the digital interface when the user presses a digital interface key to watch a program received from a second device connected to the digital interface; If the user selects a second device from the screen, the first device performs an asynchronous connection to the second device to receive and display on-screen display data from the second device. Wow, Upon completion of the asynchronous connection, the second device becomes a master after receiving a channel and bandwhis from an isochronous resource manager and then performs an isochronous connection with the first device. Initiating an isochronous transmission.

The isochronous connection is another feature of point-to-point connection.

Another feature of the method for controlling device-to-device connection of a digital interface according to the present invention for achieving the above object is a device-to-device connection of a digital interface comprising a first device having a display device and a second device, which is a storage medium, connected by a digital interface. A control method comprising: recognizing and displaying on a screen a device configured to be connected to the stored digital interface when a user presses a digital interface key to watch, record, or play a program through a digital interface; When the user selects a device, the first device receives an on-screen display data from the second device by performing an asynchronous connection to the second device, and displays the on-screen display data from the second device. Ounce If the user selects PLAY among the on-screen display data, the second device becomes the master, and after receiving the channel and band whis from the isochronous resource manager, the isochronous connection with the first device. starting the isochronous transmission by performing isochronous connection, and when the user selects RECORD among the displayed on-screen display data, the second device is mastered. After the channel is allocated from the isochronous resource manager and the band whiskey and the isochronous connection with the first device is initiated isochronous transmission (isochronous transmission) .

The isochronous connection is another feature of point-to-point connection.

According to another aspect of the present invention, there is provided a method of controlling a device-to-device connection of a digital interface according to an embodiment of the present invention. A method of controlling connection between devices of a connected digital interface, the method comprising: recognizing and displaying on a screen the devices connected to the stored digital interface when a user presses a digital interface key to watch, record, or play a program through the digital interface; When a user selects a second device from the displayed screen, the first device receives an On Screen Display data from the second device by performing an asynchronous connection to the second device and displays the on-screen display data. To do that, Upon completion of the asynchronous connection, the second device becomes the master after receiving the channel and the band whistle from the isochronous resource manager, and then performs the isochronous connection with the first device. Starting the isochronous transmission, and if the user selects PLAY among the displayed on-screen display data, the third device becomes a master and then isochronous resource manager. Starting the isochronous transmission by performing isochronous connection after the channel and the band whiskey are allocated, and a first device of the displayed on screen display data. You can select the recording of the program you are watching. In this case, after the third device becomes the master, the channel and the band whiskey are allocated from the isochronous resource manager, and then isochronous transmission is performed by performing an isochronous connection with the first device. Step and when the user selects the record (RECORD) of the program received by the second device among the displayed on-screen display data (Channel) from the isochronous resource manager after the third device becomes a master And performing isochronous connection with the second device after being allocated to the band whistle and initiating isochronous transmission.

The isochronous connection is another feature of point-to-point connection.

The present invention performs an isochronous connection after performing an asynchronous connection when the devices connected to the digital interface are connected, thereby enabling the on-screen display data and the content data. The contents of the contents data can be delivered without damage.

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.

2A and 2C are diagrams showing 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, and FIG. 2A is a diagram in which the DTV 101 and the STB 102 are connected by 1394 cables. 2B is a diagram in which the DTV 201 and the D-VHS 202 are connected by a 1394 cable, and FIG. 2C is a diagram in which the DTV 301, the STB 302, and the D-VHS 303 are connected by a 1394 cable. to be.

3A and 3B illustrate a process of performing and releasing an Asynchronous Connection applied to a method for controlling device-to-device connection of a digital interface according to the present invention. FIG. 5 is a flowchart illustrating a format of an input / output plug control register applied to a connection control method. FIG. 5 is a flowchart illustrating an embodiment of a device-to-device connection control method of a digital interface according to the present invention. FIG. 6 is a digital interface according to the present invention. Fig. 7 is a flowchart showing another embodiment of the inter-device connection control method of Fig. 7 is a flowchart showing still another embodiment of the inter-device connection control method of the digital interface according to the present invention.

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 embodiment

First, a user watches a program through the DTV 101, as shown in FIG. 2A, and then, as shown in FIG. 5, the DTV 101 or a remote controller (not shown) to watch a program received through a 1394 cable. When the 1394 key is provided, DTV 101 recognizes the devices connected to the currently stored 1394 node and displays them on the screen.

Here, the DTV 101 stores a plurality of devices connected with a 1394 cable when the power is turned on.

Thereafter, when the user selects the STB 102, the DTV 101 establishes an asynchronous connection with the STB 102, and then transmits On Screen Display data.

That is, the control unit 101a in the DTV 101 establishes an on-screen display (OSD) data processing unit 101b as shown in FIG. 3A to establish an asynchronous connection with the STB 102. ) Transmits an ALLOCATE command frame and then receives an corresponding ALLOCATE response frame from the OSD data processor 101b.

Subsequently, the DTV 101 transmits an ALLOCATE_ATTACH command frame to the producer 102, and then receives an corresponding ALLOCATE_ATTACH response frame from the producer 102.

The producer 102 here is the STB 102.

Then, the control unit 101a in the DTV 101 transmits an ATTACH command frame to the OSD data processing unit 101b according to the ALLOCATE_ATTACH response frame, and then displays the OSD data processing unit ( A corresponding ATTACH response frame is transmitted from 101b).

Subsequently, the DTV 101 receives a limit count update (run = 1) to the STB 102 and receives On Screen Display data from the STB 102.

Then, the STB 102 becomes a master at the completion of the asynchronous connection and isochronous resource manager (not shown) in order to transmit contents data such as an MPEG stream. After receiving the channel and the band whiskey from the isochronous connection (isochronous connection) is performed to start the isochronous transmission (isochronous transmission).

That is, the STB 102 has a channel number, a data rate, an overhead id, and a payload value of its output plug control register as shown in FIG. 4A. After recording this, increase the point-to-point connection counter value by '1' and turn on the on-line bit.

In addition, the STB 102 stores the channel number and the point-to-point connection counter value of the input plug control register of the DTV 101 as shown in FIG. 4B. Point-to-point connection, which is an isochronous connection, of content data such as an MPEG stream received by increasing '1' and turning on-line bits on. Output via Point connection).

That is, the STB 102 is a source for outputting content data such as received MPEG streams through a point-to-point connection, which is an isochronous connection. source node, and a destination node for receiving content data, such as an MPEG stream, output through the point-to-point connection. do.

Then, the DTV 101 receives content data such as an MPEG stream output from the STB 101 through an isochronous connection and displays the content data on the screen.

Thereafter, when the user presses the 1394 key to release the connection during the viewing of the program received from the STB 102 via the 1394 cable or after the viewing is completed, the DTV 101 connects to the STB 102 as an asynchronous connection. Release it.

That is, the control unit 101a in the DTV 101 displays a detach command frame as shown in FIG. 3B to release an asynchronous connection with the STB 102. After the transmission to the 101b, a corresponding response response frame (DETACH response frame) is received from the OSD data processor 101b.

Subsequently, the DTV 101 transmits a DETACH_RELEASE command frame to the STB 102 which is the producer 102 according to the DETACH response frame, and then corresponds to the corresponding response from the STB 102. A detach release response frame (DETACH_RELEASE response frame) is received.

Subsequently, the controller 101a in the DTV 101 transmits a release command frame to the OSD data processor 101b according to the detach release response frame DETACH_RELEASE response frame, and then the OSD data processor 101b. A release response frame corresponding thereto is received from the RELEASE response frame to release an asynchronous connection with the STB 102.

At this point, the STB 102 returns the channel and bandwhis allocated from the isochronous resource manager to release the isochronous connection, as shown in FIG. 4A. Similarly, it decrements the value of the point-to-point connection counter of its output plug control register by '1' and turns off the on-line bit.

And STB 102 decreases the point-to-point connection counter value of the input plug control register of DTV 101 by '1', as shown in FIG. Turn off the on-line bit to release the point-to-point connection, which is an isochronous connection.

Second embodiment

First, when a user watches a program through the DTV 201, as shown in FIG. 2B, and wants to record to the D-VHS 201 through a 1394 cable, as shown in FIG. When the 1394 key provided in the DTV 201 or the remote controller (not shown) is pressed to reproduce the same contents data, the DTV 201 recognizes the devices connected to the currently stored 1394 node and displays them on the screen.

Here, the DTV 201 stores a plurality of devices connected with a 1394 cable at power on.

Afterwards, when the user selects the D-VHS 202, the DTV 201 establishes an asynchronous connection with the D-VHS 202 and then transmits On Screen Display data.

That is, the DTV 201 establishes an asynchronous connection with the D-VHS 202 in the same manner as in the above-described first embodiment except that the producer 202 is the D-VHS 202. Only thing is different.

When an asynchronous connection is established through the above process, the D-VHS 202 transmits On Screen Display data to the DTV 201.

Then, the DTV 201 displays 'play' and 'record' of the on-screen display data transmitted from the D-VHS 202 on the screen.

Then, when the user selects 'PLAY', the D-VHS 202 becomes an isochronous resource manager in order to play and transmit contents data such as stored MPEG stream after becoming a master. After receiving a channel and band whiskey (not shown), an isochronous connection is performed to start an isochronous transmission.

That is, when the D-VHS 202 attempts to reproduce Contents data such as the stored MPEG stream, the channel number and data rate of its output plug control register as shown in FIG. Record the data rate, overhead id, and payload, increase the point-to-point connection counter to '1', and add the on-line bit. bit)

In addition, the D-VHS 202 is a channel number and a point-to-point connection counter of the input plug control register of the DTV 201, as shown in FIG. 4B. Increasing the value to '1' and turning on the on-line bit turns on content data such as stored MPEG stream Point-to-point connection, which is an isochronous connection. -Point connection)

The DTV 201 then displays content data such as stored MPEG streams output from the STB 101 through an isochronous connection on the screen.

That is, the D-VHS 202 is a source for outputting content data such as stored MPEG streams through a point-to-point connection, which is an isochronous connection. (Destination) node, the DTV 201 destination node for receiving content data, such as an MPEG stream output through the point-to-point connection (point-to-point connection) Becomes

In addition, when the user selects record, the D-VHS 202 may change the channel number, data rate, and data rate of the output plug control register of the DTV 101, as shown in FIG. 4A. After recording the overhead id and payload values, increase the point-to-point connection counter value by '1' and turn on the on-line bit. Let's do it.

In addition, the D-VHS 202 may set a channel number and a point-to-point connection counter value of its input plug control register as shown in FIG. 4B to '1. 'Point-to-point' isochronous connection of content data such as an MPEG stream of a program being watched by the DTV 201 after increasing the on-line bit. Record through a point-to-point connection.

That is, the DTV 202 is configured to output content data such as an MPEG stream of a program being watched through a point-to-point connection, which is an isochronous connection. A destination node, and the DTV 201 receives a destination data, such as an MPEG stream, output through the point-to-point connection. Become a node.

Thereafter, when the user presses the 1394 key to release the connection during the viewing or the completion of the program being recorded to the D-VHS 202 or the program being played back from the D-VHS 202 through the 1394 cable, the DTV 201 The asynchronous connection with the D-VHS 202 is released.

That is, the process of releasing the asynchronous connection with the D-VHS 202 by the DTV 201 is the same as that of the first embodiment described above, except that the producer 202 is the D-VHS 202. Only thing is different.

In this state, when the D-VHS 202 is playing Contents data such as a stored MPEG stream, the point-to-point connection counter of its output plug control register as shown in FIG. Decrease the value of Point-To-Point connection counter by '1' and turn off the on-line bit.

In addition, the D-VHS 202 decreases the point-to-point connection counter value of the input plug control register of the DTV 201 by '1' as shown in FIG. 4B. It turns off the on-line bit to release the point-to-point connection, which is an isochronous connection.

In addition, when the D-VHS 202 is recording a program being watched, the point-to-point connection counter of the output plug control register of the DTV 201 as shown in FIG. 4A. Decreases the value '1' and turns off the on-line bit.

In addition, the D-VHS 202 decreases the value of the point-to-point connection counter of its input plug control register by '1', as shown in FIG. Turn off the on-line bit to release the point-to-point connection, which is an isochronous connection.

Third embodiment

First, when a user watches a program through the DTV 301, as shown in FIG. 2C, and then wants to record to the D-VHS 303 via a 1394 cable, as shown in FIG. 7, the STB 302 If you press the 1394 key provided on the DTV 201 or the remote controller (not shown) to record a program received from the TV or to play content data such as a stored MPEG stream, the DTV 201 stores the current 1394. It recognizes the devices connected to the node and displays them on the screen.

Here, the DTV 301 stores a plurality of devices connected with a 1394 cable at power on.

Thereafter, when the user selects the D-VHS 303, the DTV 301 establishes an asynchronous connection with the D-VHS 303 through the STB 302, and then displays on-screen display data. ).

At this time, the STB 302 performs a function of a repeater.

That is, the process of establishing an asynchronous connection with the D-VHS 303 by the DTV 301 is the same as that described in the first embodiment, except that the producer 302 is the D-VHS 303. Only thing is different.

Then, the DTV 301 displays 'PLAY' and 'RECORD' among the On Screen Display data transmitted from the D-VHS 303 through the STB 302 on the screen. do.

Afterwards, when the user selects 'PLAY', the D-VHS 303 becomes a master and plays an isochronous resource manager (not shown) in order to play content data such as stored MPEG streams. After receiving the channel and the band whiskey from the si), isochronous connection is performed to start isochronous transmission.

That is, when attempting to reproduce Contents data such as the stored MPEG stream, the D-VHS 303 has a channel number and data rate of its output plug control register as shown in FIG. 4A. (data rate), overhead id and payload values are recorded, then the point-to-point connection counter value is increased to '1' and the online bit (on- line bit).

In addition, the D-VHS 303 may include a channel number and a point-to-point connection counter of the input plug control register of the DTV 301 as shown in FIG. 4B. Increasing the value to '1' and turning on the on-line bit turns on content data such as stored MPEG stream Point-to-point connection, which is an isochronous connection. -Point connection)

Then, the DTV 301 plays content data such as an MPEG stream stored in the D-VHS 303 output from the STB 302 through an isochronous connection, and displays the same on the screen.

That is, the D-VHS 303 is a source for outputting content data such as stored MPEG streams through a point-to-point connection, which is an isochronous connection. (Destination) node, the DTV 301 destination node for receiving content data, such as an MPEG stream output through the point-to-point connection (point-to-point connection) Becomes

In addition, when the user selects recording, the D-VHS 303 transmits the source to be recorded in a menu form, that is, 'DTV' and 'STB' to the DTV 301 to display on the screen.

In this state, if the user selects 'DTV', the D-VHS 303 becomes a master and the channel number and data of the output plug control register of the DTV 301 as shown in FIG. 4A. Record the data rate, overhead id, and payload, then increase the point-to-point connection counter to '1' -line bit)

In addition, the D-VHS 303 sets a channel number and a point-to-point connection counter value of its input plug control register as shown in FIG. 4B to '1. 'Point-to-point connection, which is an isochronous connection of content data such as MPEG stream received from the DTV 101 after increasing the on-line bit. Record through (Point-To-Point connection).

That is, the DTV 301 outputs content data such as an MPEG stream of a program being viewed through a point-to-point connection, which is an isochronous connection. The destination node becomes a source node, and the D-VHS 302 receives destination data such as an MPEG stream output through the point-to-point connection. destination) node.

On the other hand, when the user selects 'STB', the D-VHS 303 becomes a master and then the channel number and data rate of the output plug control register of the STB 301 as shown in FIG. 4A. Record the data rate, overhead id, and payload, increase the point-to-point connection counter to '1', and add the on-line bit. bit)

In addition, the D-VHS 303 sets a channel number and a point-to-point connection counter value of its input plug control register as shown in FIG. 4B to '1. 'Point-to-point connection, which is an isochronous connection of content data such as MPEG stream received from the STB 302 after increasing the on-line bit. Record through (Point-To-Point connection).

That is, the STB 302 outputs content data such as an MPEG stream of a program through a point-to-point connection, which is an isochronous connection. A destination node, and the D-VHS 303 receives destination data such as an MPEG stream output through the point-to-point connection. (destination) node.

The user then disconnects during or after viewing a program being recorded from the DTV 301 or from the STB 302 to the D-VHS 303 via a 1394 cable or a program being played from the D-VHS 303. In order to press the 1394 key, the DTV 301 releases an asynchronous connection with the D-VHS 303.

That is, the process of releasing the asynchronous connection with the D-VHS 202 by the DTV 201 is the same as that of the first embodiment described above, except that the producer 202 is the D-VHS 202. Only thing is different.

In this state, the D-VHS 303 returns the channel and the band whiskey allocated from the isochronous resource manager and then plays the contents data such as the stored MPEG stream. VHS 302 decrements the point-to-point connection counter value of its output plug control register by '1' and shows an on-line bit as shown in FIG. 4A. Off).

In addition, the D-VHS 303 decreases the point-to-point connection counter value of the input plug control register of the DTV 301 by '1', as shown in FIG. 4B, Turn off the on-line bit to release the point-to-point connection, which is an isochronous connection.

Also, when the D-VHS 303 is recording a program being watched by the DTV 301, the point-to-point connection counter (Point-) of the output plug control register of the DTV 301, as shown in Fig. 4A, is shown. Decrease the value of To-Point connection counter by '1' and turn off the on-line bit.

In addition, the D-VHS 303 decreases the value of the point-to-point connection counter of its input plug control register by '1' as shown in FIG. Turn off the on-line bit to release the point-to-point connection, which is an isochronous connection.

Also, when recording from the STB 302 to the D-VHS 303, the D-VHS 303 is the point-to-point connection counter of the output plug control register of the STB 302, as shown in Fig. 4A. Decrease the value of (Point-To-Point connection counter) by '1' and turn off the on-line bit.

In addition, the STB 302 decreases the value of the point-to-point connection counter of its own input plug control register by '1', as shown in FIG. Turn off the -line bit to release the point-to-point connection, which is an isochronous connection.

As described above, the method for controlling connection between devices of the digital interface according to the present invention is performed by performing an isochronous connection after performing an asynchronous connection when the devices connected by the digital interface are connected. On screen display data as well as the contents of the contents data (Contents data) can be delivered without damage.

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 (8)

In the method of controlling the connection between devices of a digital interface having a plurality of devices connected by a digital interface, Receiving on-screen display data by performing an asynchronous connection with the second device selected by the user in the first device having the display device when the user selects the device; Upon completion of the asynchronous connection, the second device becomes a master, receives a channel and a band whis from an isochronous resource manager, and performs an isochronous connection to perform an MPEG stream. The method of claim 1, further comprising transmitting the contents data. The method of claim 1, And the isochronous connection is a point-to-point connection. In the method of controlling connection between devices of a digital interface configured by connecting a first device having a display device and a second device which is a receiving device by a digital interface, When a user presses a digital interface key to watch a program received from a second device connected to the digital interface, recognizing and displaying the devices connected to the digital interface stored on the screen; When a user selects a second device from the displayed screen, the first device receives an On Screen Display data from the second device by performing an asynchronous connection to the second device and displays the on-screen display data. Making a step; Upon completion of the asynchronous connection, the second device becomes a master after receiving a channel and bandwhis from an isochronous resource manager and then performs an isochronous connection with the first device. A method of controlling inter-device connection of a digital interface, comprising the step of initiating an isochronous transmission. The method of claim 3, wherein And the isochronous connection is a point-to-point connection. In the method of controlling the connection between devices of a digital interface consisting of a first device having a display device and a second device which is a storage medium connected by a digital interface, When the user presses a digital interface key to watch, record or play a program through the digital interface, recognizing and displaying the devices connected to the stored digital interface on a screen; When a user selects a second device from the displayed screen, the first device receives an On Screen Display data from the second device by performing an asynchronous connection to the second device and displays the on-screen display data. Making a step; When the user selects PLAY among the displayed on-screen display data, the second device becomes a master and is assigned a channel and a band whistle from the isochronous resource manager after the second device becomes a master. Performing an isochronous connection to initiate an isochronous transmission; If the user selects RECORD from among the displayed On Screen Display data, the second device becomes a master, and after receiving a channel and band whis from the isochronous resource manager, A method of controlling connection between devices of a digital interface, comprising: performing an isochronous connection to start an isochronous transmission. The method of claim 5, And the isochronous connection is a point-to-point connection. In the method of controlling the connection between devices of a digital interface consisting of a first device having a display device, a second device as a receiving device and a third device as a storage medium connected by a digital interface, When the user presses a digital interface key to watch, record or play a program through the digital interface, recognizing and displaying the devices connected to the stored digital interface on a screen; When a user selects a second device from the displayed screen, the first device receives an On Screen Display data from the second device by performing an asynchronous connection to the second device and displays the on-screen display data. Making a step; Upon completion of the asynchronous connection, the second device becomes a master after receiving a channel and bandwhis from an isochronous resource manager and then performs an isochronous connection with the first device. Initiating an isochronous transmission; If the user selects PLAY during the displayed On Screen Display data, the third device becomes a master, and after receiving a channel and band whis from an isochronous resource manager, isochronous connection. performing isochronous connection to initiate isochronous transmission; If the user selects a RECORD of a program being viewed on the first device among the displayed On Screen Display data, the third device becomes a master and then a channel and a band whistle from the isochronous resource manager. Performing an isochronous connection with the first device after being allocated to start an isochronous transmission; If the user selects a RECORD of a program received by the second device among the displayed On Screen Display data, the third device becomes a master and then a channel and band whistle from the isochronous resource manager. And performing an isochronous connection with the second device after the allocation to initiate the isochronous transmission. The method of claim 7, wherein And the isochronous connection is a point-to-point connection.