KR101980620B1 - Sink device, source device and methods of controlling the same - Google Patents

Abstract

The present invention relates to a sink device and a source device supporting a Mobile High-definition Link (MHL). One embodiment of the present invention relates to a control method of a sink device that is connected to a source device through a MHL (Cable High-definition Link) cable and includes a display unit and displays a content received from the source device on a screen of the display unit . The control method of the sink device includes: receiving an input signal from an external input device; Controlling a pointer displayed on the screen based on the input signal; Transmitting a burst command to the source device in response to the control of the pointer; Inserting a coordinate value of the pointer into a control packet according to the burst command; And transmitting the control packet to the source device.

Description

SINK DEVICE, SOURCE DEVICE, AND CONTROL METHOD THEREOF

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sink device and a source device, and more particularly, to a sink device and a source device supporting a Mobile High-definition Link (MHL).

Interfaces connecting the sink device and the source device include DVI (Digital Visual Interactive), HDMI (High-Definition Multimedia Interface), and MHL (Mobile High-definition Link).

DVI is an interface for delivering digital video signals and is a standard developed by the Digital Display Working Group (DDWG). HDMI is a multimedia interface for delivering uncompressed digital audio and video signals over a single cable, enabling the transmission of control signals between connected devices. The MHL is an interface for delivering digital audio and video signals, such as HDMI, and enables transmission and power supply of high-quality video data through fewer pins between connected devices.

An object of the present invention is to control a source device using information input through a sink device.

It is another object of the present invention to provide an MHL protocol for efficient data transmission between a sink device and a source device.

One embodiment of the present invention relates to a control method of a sink device that is connected to a source device through a MHL (Cable High-definition Link) cable and includes a display unit and displays a content received from the source device on a screen of the display unit . The control method of the sink device includes: receiving an input signal from an external input device; Controlling a pointer displayed on the screen based on the input signal; Transmitting a burst command to the source device in response to the control of the pointer; Inserting a coordinate value of the pointer into a control packet according to the burst command; And transmitting the control packet to the source device.

In one embodiment of the present invention, the control method of the sink device includes the steps of: requesting the source device to confirm whether or not the protocol defining the control packet is supported; And receiving information indicating whether the protocol is supported from the source device.

In one embodiment of the present invention, the control method of the sink device includes: displaying a soft key associated with the control of the source device on the screen; And transmitting the control signal generated by the soft key to the source device when the soft key is selected by the pointer. Here, the soft key may correspond to a hard key included in the source device.

In an embodiment, the external input device includes a spatial remote control device, and the pointer can move according to the motion of the spatial remote control device.

In an embodiment, in the step of transmitting the burst command and the control packet, the burst command and the control packet include a control bus (Control BUS: CBUS) defined by an MHL between the source device and the sink device Lt; / RTI > to the source device.

An embodiment of the present invention relates to a method of controlling a source device connected to a sink device through an MHL cable to provide a content to the sink device. The method of controlling a source device includes receiving a control packet according to a burst command from the sink device; Detecting a coordinate value of a pointer displayed on a screen of the sink device in the control packet; And recognizing the coordinate value of the pointer as a control command.

In one embodiment of the present invention, the control method of the source device includes: receiving, from the sink device, a confirmation request as to whether or not the protocol defining the control packet is supported; And transmitting information indicating whether the protocol is supported to the sink device in response to the confirmation request.

In one embodiment of the present invention, the control method of the source device further comprises: receiving, from the sink device, a control signal generated by the soft key when the soft key displayed on the screen is selected by the pointer; And recognizing the control signal as an input of a hard key included in the source device.

One embodiment of the present invention relates to a sink device for receiving content from a source device connected via an MHL cable. The sink device includes: an interface unit for receiving an input signal from an external input device; A display unit for displaying the content and a pointer controlled based on the input signal; And a controller for generating a burst command in response to the control of the pointer, calculating a coordinate value of the pointer, inserting the pointer into a control packet according to the burst command, and transmitting the burst command and the control packet to the source device do.

In an exemplary embodiment, the control unit may request the source device to confirm whether or not the protocol defining the control packet is supported, and receive information indicating whether the protocol is supported from the source device.

In an exemplary embodiment, the display unit may display a soft key corresponding to a hard key included in the source device. When the soft key is selected by the pointer, the control unit may transmit a control signal recognized as an input by the hard key to the source device. In addition, the control unit may transmit the burst command and the control packet to the source device via a control bus defined by the MHL.

One embodiment of the present invention relates to a source device connected to a sink device via an MHL cable to provide content to the sink device. Wherein the source device comprises: a detector for receiving a control packet according to a burst command from the sink device and detecting a coordinate value of a pointer displayed on the screen of the sink device in the control packet; And a controller for recognizing the coordinate value of the pointer as a control command.

In one embodiment, the control unit receives from the sink device a confirmation request as to whether or not the protocol defining the control packet is supported, and transmits, in response to the confirmation request, information indicating whether or not the protocol is supported to the sink device Lt; / RTI >

In an embodiment, the source device may further comprise a hard key located in the body. The control unit receives the control signal generated by the soft key from the sink device when the soft key displayed on the screen is selected by the pointer and recognizes the control signal as the input of the hard key can do.

According to the present invention, the coordinate value of the pointer displayed on the sink device through the control packet corresponding to the MHL burst command can be provided to the source device and used as a control command of the source device. As a result, extended control information can be transmitted between the sink device and the source device over the MHL interface.

Further, according to the present invention, a user interface for controlling a source device in a sink device is provided, so that a user can indirectly control a source device via a sink device. Thus, the control of the sink device is easy, while the control of the source device is difficult, the user convenience can be improved.

1 is a block diagram showing an image display apparatus and an external input apparatus according to the present invention.
FIG. 2A and FIG. 2B are conceptual diagrams showing the mutual operation of the video display device and the external input device according to the present invention.
FIG. 3 is a block diagram showing the external input device of FIG. 1 in detail.
4 is a block diagram illustrating an MHL interface associated with the present invention.
5 is a block diagram illustrating an external input device, a sink device, and a source device according to an embodiment of the present invention.
6 is a flowchart illustrating a method of controlling a sink device and a source device according to an embodiment of the present invention.
7 is a conceptual diagram illustrating a structure of a control packet according to an embodiment of the present invention.
8 is a flowchart illustrating a method of controlling a sink device and a source device according to another embodiment of the present invention.
FIG. 9 is a conceptual diagram showing an operation example of a sink device and a source device to which the control method of FIG. 8 is applied.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the technical idea of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention, parts not related to the description are omitted, and like parts are denoted by similar reference numerals throughout the specification.

In this specification, a sink device refers to a device that receives content from a source device and displays it on a screen, and a source device refers to a device that provides content to a sink device. For example, the sink device includes a TV, a computer monitor, a projector, and the like as a video display device, and the source device may be a set top box, a DVD player, a PVR player, a digital video recorder, a game device, a camcorder, , A smart phone, and the like. Hereinafter, a video display device implemented as a sink device will be described first.

1 is a block diagram showing an image display apparatus 100 and an external input apparatus 200 according to the present invention.

1, an image display apparatus 100 includes a tuner 110, a demodulator 120, a signal input / output unit 130, an interface unit 140, a control unit 150, a storage unit 160, Unit 170 and an audio output unit 180.

The tuner 110 selects an RF broadcast signal corresponding to a channel selected by the user among RF (Radio Frequency) broadcast signals received through the antenna, and converts the RF broadcast signal into an intermediate frequency signal or a baseband video / audio signal . For example, if the RF broadcast signal is a digital broadcast signal, the tuner 110 converts the RF broadcast signal into a digital IF signal (DIF). On the other hand, if the RF broadcast signal is an analog broadcast signal, the tuner 110 converts the RF broadcast signal into an analog baseband video / audio signal (CVBS / SIF). As described above, the tuner 110 may be a hybrid tuner capable of processing a digital broadcasting signal and an analog broadcasting signal.

The digital IF signal DIF output from the tuner 110 is input to the demodulator 120 and the analog baseband video / audio signal CVBS / SIF output from the tuner 110 is input to the controller 160 . The tuner 120 can receive an RF broadcast signal of a single carrier according to an Advanced Television Systems Committee (ATSC) scheme or an RF broadcast signal of a plurality of carriers according to a DVB (Digital Video Broadcasting) scheme.

Although one tuner 110 is shown in the drawing, the present invention is not limited thereto. The video display device 100 may include a plurality of tuners, for example, first and second tuners. In this case, the first tuner may receive the first RF broadcast signal corresponding to the broadcast channel selected by the user, and the second tuner may sequentially or periodically receive the second RF broadcast signal corresponding to the previously stored broadcast channel . The second tuner can convert the RF broadcast signal into a digital IF signal (DIF) or an analog baseband video / audio signal (CVBS / SIF) in the same manner as the first tuner.

The demodulator 120 receives the digital IF signal DIF converted by the tuner 110 and performs a demodulation operation. For example, if the digital IF signal DIF output from the tuner 110 is of the ATSC scheme, the demodulator 120 performs an 8-VSB (8-Vestigal Side Band) demodulation. At this time, the demodulator 120 may perform channel decoding such as trellis decoding, de-interleaving, and Reed-Solomon decoding. For this, the demodulator 120 may include a trellis decoder, a de-interleaver, and a Reed Solomon decoder.

For example, if the digital IF signal DIF output from the tuner 110 is of the DVB scheme, the demodulator 120 performs COFDMA (Coded Orthogonal Frequency Division Modulation) demodulation. At this time, the demodulator 120 may perform channel decoding such as convolutional decoding, deinterleaving, and Reed-Solomon decoding. For this, the demodulator 120 may include a convolution decoder, a deinterleaver, and a Reed-Solomon decoder.

The signal input / output unit 130 may be connected to an external device to perform signal input and output operations, and may include an A / V input / output unit and a wireless communication unit.

The A / V I / O section is composed of an Ethernet terminal, a USB terminal, a CVBS (Composite Video Banking Sync) terminal, a component terminal, an S- video terminal (analog), a DVI (digital visual interface) terminal, , A Mobile High-definition Link (MHL) terminal, an RGB terminal, a D-SUB terminal, an IEEE 1394 terminal, a SPDIF terminal, and a liquid HD terminal. The digital signal input through these terminals may be transmitted to the control unit 150. At this time, the analog signal inputted through the CVBS terminal and the S-video terminal may be converted into a digital signal through an analog-digital converter (not shown) and transmitted to the controller 150.

The wireless communication unit can perform a wireless Internet connection. For example, the wireless communication unit performs wireless Internet access using a WLAN (Wi-Fi), a Wibro (wireless broadband), a Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) can do. In addition, the wireless communication unit can perform short-range wireless communication with other electronic devices. For example, the wireless communication unit can perform near field wireless communication using Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee have.

The signal input / output unit 130 may be a video input / output unit for inputting video signals and audio signals provided from external devices such as a digital versatile disk (DVD) player, a Blu-ray player, a game device, a camcorder, Signals and data signals to the controller 150. [ The controller 150 can also transmit video signals, audio signals, and data signals of various media files stored in an external storage device such as a memory device, a hard disk, and the like. In addition, the video signal, audio signal, and data signal processed by the control unit 150 can be output to other external apparatuses.

The signal input / output unit 130 may be connected to a set top box, for example, a set top box for IPTV (Internet Protocol TV) through at least one of the various terminals described above to perform signal input and output operations. For example, the signal input / output unit 130 can transmit a video signal, an audio signal, and a data signal processed by the settop box for IPTV to the controller 150 so as to enable bidirectional communication, Signals to IPTV set-top boxes. Here, the IPTV may include ADSL-TV, VDSL-TV, FTTH-TV, etc. classified according to the transmission network.

The digital signal output from the demodulation unit 120 and the signal output unit 130 may include a stream signal TS. The stream signal TS may be a signal in which a video signal, an audio signal, and a data signal are multiplexed. For example, the stream signal TS may be an MPEG-2 TS (Transprt Stream) multiplexed with an MPEG-2 standard video signal, a Dolby AC-3 standard audio signal, or the like. Here, the MPEG-2 TS may include a header of 4 bytes and a payload of 184 bytes.

The interface unit 140 may receive an input signal for power control, channel selection, screen setting, etc. from the external input device 200, or may transmit the signal processed by the control unit 160 to the external input device 200 . The interface unit 140 and the external input device 200 may be connected by wire or wirelessly.

The control unit 150 may control the overall operation of the image display apparatus 100. [ For example, the controller 150 may control the tuner 110 to tuning an RF broadcast signal corresponding to a channel selected by the user or a previously stored channel. Although not shown in the figure, the controller 150 may include a demultiplexer, an image processor, a voice processor, a data processor, an OSD (On Screen Display) generator, and the like.

The control unit 150 may demultiplex the stream signal TS, for example, the MPEG-2 TS into a video signal, a voice signal, and a data signal.

The control unit 150 may perform image processing, e.g., decoding, on the demultiplexed video signal. In more detail, the control unit 150 decodes an MPEG-2 standard-encoded video signal using an MPEG-2 decoder, and encodes the video signal in accordance with a DMB (Digital Multimedia Broadcasting) scheme or an H It is possible to decode the encoded video signal of the .264 standard. In addition, the controller 150 may perform image processing such that the brightness, tint, and color of the image signal are adjusted. The image signal processed by the control unit 150 may be transmitted to the display unit 170 or may be transmitted to an external output device (not shown) through an external output terminal.

The control unit 150 may perform speech processing, e.g., decoding, on the demultiplexed speech signal. More specifically, the control unit 150 decodes an MPEG-2 standard-encoded audio signal using an MPEG-2 decoder, and uses an MPEG 4 decoder to decode an MPEG 4 bit sliced arithmetic coding Decodes the encoded voice signal, and decodes the encoded voice signal of the AAC (Advanced Audio Codec) standard of MPEG 2 according to the satellite DMB scheme or DVB-H using the AAC decoder. In addition, the controller 150 may process a base, a treble, a volume control, and the like. The voice signal processed in the control unit 150 may be transmitted to the audio output unit 180, for example, a speaker, or may be transmitted to an external output device.

The control unit 150 may perform signal processing on the analog baseband video / audio signal (CVBS / SIF). Here, the analog baseband video / audio signal CVBS / SIF input to the controller 150 may be an analog baseband video / audio signal output from the tuner 110 or the signal input / output unit 130. The signal-processed video signal is displayed through the display unit 170, and the signal-processed audio signal is output through the audio output unit 180.

The control unit 150 may perform data processing, for example, decoding, on the demultiplexed data signal. Here, the data signal may include electronic program guide (EPG) information including broadcast information such as a start time and an end time of a broadcast program broadcasted on each channel. The EPG information includes, for example, TSC-PSIP (ATSC-Program and System Information Protocol) information in the ATSC scheme and DVB-SI information (DVB-SI information) in the DVB scheme. The ATSC-PSIP information or the DVB-SI information may be included in the header (4 bytes) of the MPEG-2 TS.

The controller 150 may perform a control operation for the OSD process. In more detail, the control unit 150 may include at least one of a video signal and a data signal, or an OSD for displaying various information in graphic or text form based on an input signal received from the external input device 200. [ Signal can be generated. The OSD signal may include various data such as a user interface screen of the image display apparatus 100, a menu screen, a widget, and an icon.

The storage unit 160 may store a program for signal processing and control of the controller 160 or may store a video signal, a voice signal, and a data signal. The storage unit 160 may be a flash memory, a hard disk, a multimedia card micro type, a card type memory (for example, SD or XD memory), a random access (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM) Or at least one storage medium.

The display unit 170 may convert a video signal, a data signal, an OSD signal, etc. processed by the controller 150 into an RGB signal to generate a driving signal. The display unit 170 may be a plasma display panel (PDP), a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT-LCD), an organic light emitting diode A light emitting diode (OLED), a flexible display, a three-dimensional display (3D display), and an electronic ink display (e-ink display). The display 180 may also be implemented as a touch screen to perform the functions of an input device.

The audio output unit 180 outputs the audio signal processed by the control unit 160, for example, a stereo signal or a 5.1 channel signal. The audio output unit 180 may be implemented by various types of speakers.

The external input device 200 is connected to the interface 140 via a wired or wireless network and transmits an input signal generated according to a user input to the interface 140. The external input device 200 may include a remote control device, a mouse, a keyboard, and the like. The remote control device can transmit an input signal to the interface unit 140 through Bluetooth, RF communication, infrared communication, UWB (Ultra Wideband), ZigBee, or the like. The remote control device may be implemented as a space remote control device. The spatial remote control device can detect an operation of the main body in a space and generate an input signal.

The video display device 100 receives at least one of ATSC (8-VSB) digital broadcasting, DVB-T (COFDM) digital broadcasting, ISDB-T (BST-OFDM) And can be implemented as a fixed digital broadcasting receiver as much as possible. In addition, the video display device 100 may be a terrestrial DMB digital broadcasting, a satellite DMB digital broadcasting, an ATSC-M / H digital broadcast, a DVB-H (COFDM) digital broadcast, a Media Foward Link Only) type digital broadcasting, or the like. Also, the video display device 100 may be implemented as a digital broadcast receiver for cable, satellite communication, and IPTV.

2A and 2B are conceptual diagrams showing the mutual operation of the image display apparatus 100 and the external input apparatus 200 related to the present invention. Here, a TV receiver is shown as an example of the video display device 100, and a spatial remote control device is shown as an example of the external input device 200. [

Referring to FIGS. 2A and 2B, the external input apparatus 200 can transmit or receive a signal with the image display apparatus 100 according to an RF communication standard. A pointer 102 controlled according to a control signal of the external input apparatus 200 may be displayed on the screen of the image display apparatus 100. [

The user can move or rotate the external input apparatus 200 up, down, left and right and back and forth. At this time, the external input device 200 can detect the movement and generate an external input signal. To this end, the external input device 200 may include a sensor for detecting movement. Also, the external input device 200 includes a plurality of buttons, and can generate an external input signal according to a user's operation of the button.

The image display apparatus 100 can control the pointer 102 displayed on the screen according to an external input signal received from the external input apparatus 200. [ For example, when the external input device 200 moves to the left, as shown, the pointer 102 can also move to the left in response. In more detail, the image display apparatus 100 can detect the motion information of the external input apparatus 200 from the received control signal, and analyze the motion information to calculate the pointer coordinate value. Then, the image display apparatus 100 can display the pointer 102 on the screen in accordance with the calculated pointer coordinate value. At this time, the moving speed and moving direction of the pointer 102 may correspond to the moving speed and moving direction of the external input device 200, respectively.

3 is a block diagram showing the external input device 200 of FIG. 1 in detail. 3, the external input device 200 includes a wireless communication unit 210, a user input unit 220, a sensing unit 230, an output unit 240, a power supply unit 250, a storage unit 260, (Not shown).

The wireless communication unit 210 transmits a signal to the video display device 100 or receives a signal from the video display device 100. For this, the wireless communication unit 210 may include an RF module 211 and an IR module 212. The RF module 211 is connected to the interface unit 140 of the video display device 100 according to the RF communication standard to transmit and receive a signal and the IR module 212 is connected to the interface of the video display device 100 according to the IR communication standard. (140).

The user input unit 220 may include a key pad, a key button, a scroll key, and a jog key as input means. The user can input a command related to the image display apparatus 100 by operating the user input unit 220. [ Such an instruction may be input, for example, by a push operation of the hard key button of the user input unit 200 by the user.

The sensing unit 230 may include a gyro sensor 231 and an acceleration sensor 232. The gyro sensor 231 can sense the spatial movement of the external input device 200 based on the x, y, and z axes. The acceleration sensor 232 can sense the moving speed of the external input device 200 or the like.

The output unit 240 outputs information corresponding to the operation of the user input unit 230 and information corresponding to the transmission signal of the image display apparatus 100. [ Accordingly, the user can recognize the operation state of the user input unit 230 or the control state of the image display apparatus 100 through the output unit 230. [ For example, the output unit 240 may include an LED module 241 that is turned on, a vibration module 242 that generates vibration, a vibration module that generates vibration, An audio output module 243 for outputting sound and a display module 244 for outputting an image.

The power supply unit 250 supplies power to various electronic devices of the external input device 200. When the external input device 200 is not moved for a predetermined period of time, the power supply unit 250 may stop power supply, thereby reducing power consumption. The power supply unit 250 may resume power supply when a predetermined key of the external input device 200 is operated.

The storage unit 260 may store various programs, applications, frequency band information, and the like related to the control or operation of the external input device 200. The control unit 270 performs an overall control operation of the external input device 200.

In the following, an MHL system including a sink device and a source device interconnected via a Mobile High-definition Link (MHL) cable will be described.

4 is a block diagram illustrating an MHL interface associated with the present invention. Referring to FIG. 4, the MHL interface includes a TMDS (Transition Minimized Differential Signaling) channel, a CBUS (Control Bus), and a VBUS (Voltage BUS), through which audio data, video data, device information, Lt; / RTI >

The TMDS channel is used to transmit video data, audio data, Auxiliary Information, and the like. CBUS is a path through which a control signal is transmitted, through which a remote control protocol (RCP) signal and a burst command can be transmitted and received. The burst command includes a write burst command and a read burst command. VBUS is used to transmit power signals.

5 is a block diagram illustrating an external input device 200, a sink device 300, and a source device 400 according to an embodiment of the present invention. Hereinafter, description of the same or similar components to those of the above-described embodiment will be omitted.

5, the sink device 300 and the source device 400 may be interconnected via an MHL cable. The source device 400 provides the content to the sink device 300 and the sink device 300 can receive the content from the source device 400 and display the content on the screen. Content can also be referred to as digital content or multimedia content, and refers to information that digitalizes, processes, and distributes text, images, moving pictures, audio, and the like.

Hereinafter, the sink device 300 and the source device 300 according to the embodiment of the present invention will be described in order, while omitting redundant description of the external input device 200. FIG.

The sink device 300 may include an interface unit 310, a display unit 320, and a control unit 330.

The interface unit 310 may be connected to the external input device 200, for example, a space remote control device by wire or wirelessly, to receive an external input signal. The external input signal received from the spatial remote control device may include motion information of the spatial remote control device, a control command according to the key operation, and the like.

The display unit 320 may display image contents received from the source device 400. [ At this time, the image content can correspond to the execution screen of the application executed in the source device 400. [ This means that the image displayed on the sink device 300 and the image displayed on the source device 400 can be synchronized.

In addition, the display unit 320 may display a pointer corresponding to the external input device 200. These pointers can be controlled based on an external input signal, as described with reference to Figs. 2A and 2B.

In addition, the display unit 320 may display soft keys, menus, and the like related to the control of the source device 400. [ For example, the display unit 320 may display a soft key corresponding to a hard key included in the source device 400. [

The control unit 330 may calculate the coordinate value of the pointer in response to the control of the pointer, and may generate the burst command and the control packet. Here, the burst command is a command defined in the MHL specification, and includes a write burst command and a read burst command. The burst command is recognized as a write burst command on the side of transmitting the control packet at the generation of the burst command and the burst command is recognized as the read burst command on the side receiving the control packet. The control unit 330 inserts the coordinate value of the calculated pointer into the control packet corresponding to the burst command and sends the burst command and control packet to the source device 400 via the control bus CBUS (see FIG. 4) defined in the MHL Lt; / RTI >

In order to transmit the coordinate value of the pointer using the control packet corresponding to the burst command, the sink device 300 and the source device 400 first transmit a protocol defining the control packet as described above Quot;). ≪ / RTI > Accordingly, when it is detected that the sink device 300 and the source device 400 are interconnected through the MHL cable, the control unit 330 requests the source device 400 to confirm whether or not the coordinate transmission protocol is supported, It may receive information indicating whether or not the support is supported from the source device 400 in response to the request.

If the source device 400 does not support the coordinate transfer protocol, the control unit 330 may not perform the operation related to the transfer of the coordinate value of the pointer at the time of controlling the pointer. Therefore, the load due to unnecessary data transmission can be reduced.

When the soft key displayed on the display unit 320 is selected by a pointer, the control unit 330 transmits a control signal recognized as an input by a hard key included in the source device 400 to the source device 400 ). This means that the soft key of the sink device 300 can replace the hard key of the source device 400. [

The source device 400 includes a detection unit 410, a storage unit 420, and a control unit 430.

The detecting unit 410 receives the control packet corresponding to the burst command from the sink device 300 through the MHL cable and can detect the coordinate value of the pointer displayed on the screen of the sink device 300 in the control packet.

The storage unit 420 may store contents to be provided to the source device 400, various applications, information related to the MHL interface, and the like. The storage unit 420 may store coordinate values of the control signal received from the sink device 300 and the pointer detected by the detection unit 410. [

The control unit 430 may recognize the coordinate value of the pointer as a control command and perform a control operation. For example, the control unit 430 may recognize the coordinate value of the pointer as a touch input to the source device 400. Accordingly, the user can control the pointer of the sink device 300 using the external input device 200 without directly touching the source device 400, so that the source device 400 can be controlled based on the touch input Can be obtained.

In addition, the controller 430 receives a request for confirmation of whether or not the coordinate transmission protocol is supported by the sink device 300, and transmits the information indicating whether or not the coordinate transmission protocol is supported to the sink device 300 in response to the request.

The control unit 430 receives a control signal generated by the soft key of the sink device 300 from the sink device 300 and can perform a control operation based on the received control signal. For example, the control unit 430 can recognize the control signal received from the sink device 300 as an input of the hard key of the source device 400 and perform a control operation.

6 is a flowchart illustrating a method of controlling the sink device 300 and the source device 400 according to an embodiment of the present invention.

Referring to FIG. 6, a step of connecting the sink device 300 and the source device 400 with an MHL cable (S102) is performed. Next, a step S104 of transmitting a confirmation request as to whether or not the coordinate transmission protocol is supported from the sink device 300 to the source device 400 (S104), and a step of indicating whether or not the coordinate transmission protocol is supported in response to the confirmation request The step of transferring the information from the source device 400 to the sink device 300 (S106) is performed.

Subsequently, with reference to FIG. 6, the following steps will be described in the case where both the sink device 300 and the source device 400 support the coordinate transfer protocol.

The step of transmitting the external input signal of the external input device 200 generated by the user's operation from the external input device 200 to the sink device 300 is performed (S108). Next, a step S110 is performed in which the sink device 300 controls a pointer displayed on the display unit 320 (refer to FIG. 5) based on an external input signal. For example, the pointer can move in one direction based on an external input signal.

When the pointer is controlled as described above, the sink device 300 generates a burst command and transmits the burst command to the source device 400 (S112). When the burst command is generated, the corresponding control packet can be defined, as described above.

Thereafter, the sink device 300 calculates the coordinate value of the pointer and inserts it into the control packet corresponding to the burst command (S114) and the step of transferring the control packet from the sink device 300 to the source device 400 (S116 ) Is performed.

Next, step S118 of detecting the coordinate value of the pointer in the control packet received from the sink device 300 by the source device 400 and step S120 of recognizing it as a control command are performed.

As described above, according to the present invention, the coordinate value of the pointer displayed on the sink device 300 through the control packet corresponding to the MHL burst command is provided to the source device 400, Can be used. Thus, extended control information can be transmitted between the sink device 300 and the source device 400 through the MHL interface.

7 is a conceptual diagram illustrating a structure of a control packet according to an embodiment of the present invention. 7, the control packet has a size of, for example, 8 bytes and includes a 1-byte category field (CATEGORY), a 1-byte command field (COMMAND), and a 6-byte payload . ≪ / RTI >

The category field CATEGORY may have a field value (e.g., 0x01) indicating that the control packet is for control information delivery, a field value indicating that the connection device type is to be confirmed (e.g., 0x02), and the like.

The command field (COMMAND) indicates the associated external input device. For example, the command field (COMMAND) may include a field value (e.g., 0x01) indicating that the control packet is associated with the remote control device, a field value indicating that the control packet is associated with the remote device (e.g., 0x02) (E.g., 0x03).

The payload PAYLOAD may include a 1-byte action field ACTION, a 2-byte X coordinate field X_POS, a 2-byte Y coordinate field Y_POS, a 1-byte spare area field RESERVED, . The action field ACTION indicates information about whether or not the sink device and the source device are connected, and hard key information of the external input device. The coordinate fields X_POS and Y_POS indicate the screen size information of the sink device, the coordinate values of the pointer corresponding to the motion of the external input device, and the like.

8 is a flowchart illustrating a method of controlling a sink device 300 and a source device 400 according to another embodiment of the present invention.

8, first, a step S210 is performed in which the sink device 300 displays a soft key related to the control of the source device 400 on the display unit 320 (see FIG. 5).

Thereafter, when an external input signal is transmitted from the external input device 200 to the sink device 300 (S220) and the pointer of the sink device 300 is controlled based on the external input signal, the soft key is selected by the pointer (S230) is performed.

When the soft key is selected, the control signal generated by the soft key is transmitted from the sink device 300 to the source device 400 (S240). Next, the source device 400 recognizes the control signal as the input of the hard key corresponding to the soft key (S250).

As described above, according to the present invention, the user interface for controlling the source device 400 in the sink device 300 allows the user to indirectly control the source device 400 through the sink device 300 . Accordingly, the control of the sink device 300 is easy, while the control of the source device 400 is difficult, the user convenience can be improved.

9 is a conceptual diagram showing an operation example of the sink device 300 and the source device 400 to which the control method of FIG. 8 is applied. Here, a remote control device as the external input device 200, a smart TV as the sink device 300, and a smart phone as the source device 400 are shown.

Contents provided by the source device 400, a pointer 302 corresponding to the external input device 200, various soft keys 322 and 324, and the like may be displayed on the display unit 320 of the sink device 300 have. At this time, at least one 322 of the soft keys 322, 324 may correspond to the hard key 422 of the source device 400. In addition, at least one other 324 of the soft keys 322, 324 may be associated with the control of the source device 400. For example, a soft key 324 for enlarging or reducing the screen of the source device 400 may be displayed on the display unit 320 of the sink device 300.

In addition, although not shown in the figure, a menu, an application list, and the like for executing a predetermined function of the source device 400 may be displayed on the display unit 320 of the sink device 300.

The sink device 300 can control the pointer 302 based on an external input signal received from the external input device 200. [ When the soft key 322 corresponding to the hard key 422 of the source device 400 is selected by the pointer 302, the sink device 300 determines that the soft key 322 corresponding to the hard key 422 of the source device 400 is selected. A control signal recognized as an input of the hard key 422 can be generated and transmitted to the source device 400. [

The configuration and method of the embodiments disclosed herein may not be limitedly applied, but all or some of the embodiments may be selectively combined so that various modifications may be made.

Claims (16)

delete delete delete delete delete delete delete delete delete A sink device for receiving content from a source device interconnected via an MHL cable, the device comprising:
An interface unit for receiving an input signal from an external input device;
A display unit for displaying the content and a pointer controlled based on the input signal; And
And a control unit for requesting the source device to confirm whether or not the coordinate transfer protocol is supported when it is interconnected with the source device through the MHL cable and receiving information indicating whether the coordinate transfer protocol is supported from the source device and,
Wherein,
When the source device does not support the coordinate transfer protocol, does not perform an operation related to the transmission of the coordinate value corresponding to the control of the pointer,
If the source device supports the coordinate transfer protocol,
Generating an MHL burst command in response to the control of the pointer, calculating a coordinate value of the pointer, inserting the calculated value into a control packet according to the MHL burst command, and transmitting the MHL burst command and the control packet to the source device Features a sink device. delete 11. The method of claim 10,
The display unit includes:
A soft key corresponding to a hard key included in the source device,
Wherein,
Wherein when the soft key is selected by the pointer, a control signal recognized as an input by the hard key is transmitted to the source device. 11. The method of claim 10,
Wherein,
And transmits the MHL burst command and the control packet to the source device via a control bus defined by the MHL. CLAIMS What is claimed is: 1. A source device interconnected with a sink device via an MHL cable to provide content to the sink device, the source device comprising:
Receiving a confirmation request as to whether or not the coordinate transmission protocol is supported from the sink device supporting the coordinate transmission protocol when it is interconnected with the source device through the MHL cable, And transmits the information to the sink device; And
And a detector for receiving a control packet according to an MHL burst command from the sink device after the transmission of the information and detecting a coordinate value of a pointer displayed on the screen of the sink device in the control packet,
Wherein,
And recognizes the coordinate value of the pointer as a control command. delete 15. The method of claim 14,
Further comprising a hard key located in the body,
Wherein,
Characterized in that when a soft key displayed on the screen is selected by the pointer, a control signal generated by the soft key is received from the sink device, and the control signal is recognized as an input of the hard key device.

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