KR101582801B1 - High definition multimedia interface dongle and control method thereof - Google Patents

High definition multimedia interface dongle and control method thereof Download PDF

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Publication number
KR101582801B1
KR101582801B1 KR1020150099644A KR20150099644A KR101582801B1 KR 101582801 B1 KR101582801 B1 KR 101582801B1 KR 1020150099644 A KR1020150099644 A KR 1020150099644A KR 20150099644 A KR20150099644 A KR 20150099644A KR 101582801 B1 KR101582801 B1 KR 101582801B1
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South Korea
Prior art keywords
output device
playback device
hdmi
playback
operation command
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KR1020150099644A
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Korean (ko)
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김태군
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주식회사 아이엠에스세미콘덕터코리아브랜치
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
    • H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
    • H04N21/43635—HDMI
    • H04L29/10—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The HDMI dongle and the control method thereof are provided with a first port portion coupled to an HDMI port provided in a playback device, a second port portion receiving power from the playback device, a second port portion connected to the first port portion, A signal conversion module for converting the audio and video signals from the HDMI standard to the MIPI standard, a communication module for communicating with the output device and the reproduction device, and a communication module for encoding the audio and video signals converted by the signal conversion module, And a control unit for receiving the operation command input to the output device to control the operation of the playback device through the UIBC and transmitting the packet to the playback device via the communication module, And provides bi-directional communication between the playback device and the output device, The effect of receiving the playback operation instruction from the operation unit by transmitting to the playback device via the HDMI dongle via the output device to control the operation of the reproducing apparatus can be obtained.

Figure R1020150099644

Description

HIGH DEFINITION MULTIMEDIA INTERFACE DONGLE AND CONTROL METHOD THEREOF BACKGROUND OF THE INVENTION [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an HDMI dongle and a control method thereof, and more particularly to an HDMI dongle and a control method thereof for transmitting audio and video reproduced in a mobile device to a large display device in a wireless communication manner.

Recently, a variety of mobile devices such as portable computers (notebooks), smart phones, and digital cameras have been used.

In such a mobile device, a display device for displaying various images or information on a screen is applied. However, the display device has a limitation on a screen size in order to improve portability and mobility.

Accordingly, in recent years, a miracast or mirroring technique for transmitting a screen of a mobile device or a desktop computer to a large display device such as a TV using a wireless communication method and a dongle for implementing the technology have been developed .

For example, Patent Document 1 and Patent Document 2 described below disclose a dongle configuration for displaying a screen of a mobile device on a large display.

Patent Document 1 discloses a wireless high-resolution interface unit for transmitting an AV signal transmitted through a PCMCIA port and a PCMCIA port, and a multi-input / output unit for transmitting a signal transmitted through a wireless high-resolution interface unit through a predetermined operating frequency band. A wireless AV transmission / reception dongle device configuration including an AV transmission dongle device is disclosed.

Patent Document 2 discloses a dongle configuration that enables a large display to be used together with mobile terminals without using a conventional display interface in a mobile terminal device.

In recent years, high-definition multimedia interface (HDMI) technology has been applied to connect a mobile device such as a portable computer or a smart phone with a large-sized display device such as a TV in a wired manner.

The HDMI transmits video and audio signals of a digital system at the same time through a single cable. When both a playback device and an output device are equipped with an HDMI port, only one HDMI cable can be connected to easily enjoy video and sound at the same time.

And since HDMI is a digital system that does not deteriorate quality, it has excellent image quality and sound quality, and can transmit full HD or UHD high definition video and 5.1 channel or 7.1 channel stereo sound with only one cable.

The HDMI port is used in various standards such as a mini HDMI terminal applied to a portable computer, a micro HDMI terminal applied to a smart phone, etc., in addition to a standard HDMI terminal, depending on a device to which it is applied.

Korean Patent Publication No. 10-2011-0004143 (published on Jan. 13, 2011) Korean Patent Registration No. 10-1005094 (issued on December 30, 2010)

However, the conventional dongle device is connected to the input terminal side of the output device, and receives the audio and video signals transmitted through the wireless communication module provided in the playback device and transmits the received audio and video signals to the output device (Rx) system.

For example, recent portable computers are adopting Wi-DI (Wireless Display) technology, which transmits various types of contents such as movies, music, pictures, videos and app screens wirelessly to HDTVs.

Accordingly, the conventional dongle device has a function of receiving a signal transmitted from a playback device at an output device having no Wi-Di function.

As a result, there is a problem that the conventional dongle device of the receiving method can not be applied to a reproducing device having no wireless transmitting function such as Wi-Di.

In order to support the Wi-Di technology, a portable computer has to be installed with an operating system (OS) of a specific version or more, and the load to be processed by the CPU of the portable computer is increased, thereby causing multi tasking .

Accordingly, the development of HDMI dongle technology capable of transmitting and outputting audio and video signals to a large display device regardless of the type of various playback devices such as a computer or a mobile device, combined with an HDMI terminal applied to a desktop computer and a mobile device It is necessary.

In addition, the conventional dongle apparatus provides only unidirectional communication for transmitting a signal from a playback apparatus to an output apparatus.

Therefore, the conventional dongle apparatus has a problem that it must operate the reproducing apparatus without directly receiving an operation command to be performed through the remote controller of the output apparatus.

Accordingly, in the conventional dongle apparatus, when the reproducing apparatus and the output apparatus are spaced apart from each other at a long distance, it is inconvenient for the user to move to the reproducing apparatus and operate it.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for transmitting audio and video reproduced by a reproduction apparatus in a transmission (Tx) A dongle and a control method thereof.

Another object of the present invention is to provide an HDMI dongle and a control method thereof that can minimize the load of the playback device and improve the sound quality and the image quality output from the output device.

It is still another object of the present invention to provide an HDMI dongle capable of transmitting an operation command input to an output device through bidirectional communication between a playback device and an output device and a control method thereof.

In order to achieve the above object, an HDMI dongle according to the present invention includes a first port portion coupled to an HDMI port provided in a playback apparatus, a second port portion supplied with power from the playback apparatus, And a communication module for communicating with the reproduction device, and a communication module for communicating the audio and video signals converted from the signal conversion module to the MIPI standard, Encodes the encoded audio and video signals and transmits the encoded audio and video signals to the output device through the communication module and receives an operation command input to the output device to control the operation of the playback device through the UIBC, And a control unit for controlling the transmission unit.

The present invention further includes a memory for storing a driving program for performing a mirroring function, wherein the controller controls the outputting device to perform a mirroring function simultaneously with connection with the output device by executing the driving program, And the drive program extracts and decodes the key code of the operation command received by the output device so as to be transmitted to the reproduction device.

Wherein the communication module further includes a Bluetooth module for communicating with the playback device and transmitting a key code of an operation command, and the control module is operable to transmit the key code to the playback device via the Bluetooth module instead of the second port module So as to be transmitted.

Wherein the playback device comprises a storage unit for storing a key code of an operation command input from the input device to the output device and storing the key code and a Bluetooth module for Bluetooth communication with the communication module, The key code stored in the storage unit is searched for and the operation corresponding to the search result is performed.

The control unit includes a voice encoder for encoding the voice signal through the AAC, a video encoder for encoding the video signal using the H.264 codec, a packetizer for dividing the encoded voice signal and the video signal into packets, Wherein the controller executes the drive program to select an output device to perform mirroring using RSSI, and controls the selected output device to immediately execute the mirroring function without any button operation or mode setting .

Wherein the output device comprises a communication unit for receiving a signal transmitted from the communication module via Wi-Fi and a signal conversion unit for depacketing, decoding and rendering the received signal, the communication unit communicating with the Wi- And a Bluetooth unit or an infrared communication unit for performing the infrared communication.

The input device may be a smart phone or a remote controller, and an operation command input from the input device may be one of pause, stop, play, forward, and rewind information in the audio and video playback process in the playback device, And the input function of the operation command is set to be operable only in the mirroring mode.

The present invention further comprises a receiver connected to the HDMI port of the output device when the output device is unable to receive Wi-Fi, the receiver comprising: a communication unit for receiving a signal transmitted from the communication module via Wi-Fi; And a third port unit for transmitting a signal output from the signal conversion unit to the output device.

According to another aspect of the present invention, there is provided a method of controlling an HDMI dongle, the method comprising the steps of: (a) receiving and encoding audio and video signals from a playback device in an HDMI dongle, (b) receiving an operation command received from the output device through the input device in the HDMI dongle via the UIBC and transmitting the received operation command to the playback device to control the operation of the playback device.

Wherein the step (a) includes the steps of: (a1) receiving the audio and video signals of the HDMI standard through the first port unit connected to the HDMI port of the playback device in the HDMI dongle signal conversion module and converting the received audio and video signals into MIPI standards; Encoding the audio and video signals converted by the control unit using AAC and H.264 codec, respectively, and (a3) packetizing the audio and video signals encoded by the control unit and transmitting them to the output device .

The step (a) includes: (a4) receiving a signal transmitted from the HDMI dongle using a receiver connected to the HDMI port of the output device or the output device, depacketing and decoding the received signal, And outputting the voice and image.

Wherein the step (b) includes the steps of: (b1) receiving an operation command input from the input device to the output device in the communication module; (b2) executing a drive program stored in a memory in the control unit, (B3) transmitting the decoded key code to the playback device in the communication module, and (b4) retrieving an operation command corresponding to the key code received from the playback device, And performing the operation according to the second embodiment.

In the step (b3), the communication module transmits the key code to the playback device using a second port connected to the HDMI port of the playback device or a Bluetooth module provided in the communication module.

As described above, according to the HDMI dongle and the control method thereof according to the present invention, by using the HDMI dongle of the transmission system connected to the playback device, the video and audio reproduced by the playback device are output to an output device An effect of transmitting and outputting can be obtained.

According to the present invention, the audio and video signals of the HDMI standard are encoded and packetized using the H.264 codec, and transmitted to the output device. The output device decapsulates and decodes the audio and video signals, The sound quality and the image quality of the image can be improved.

In addition, according to the present invention, the audio and video signals output from the playback device are encoded in the MIPI standard in the HDMI standard and transmitted to the output device, thereby achieving the effect that the mirroring function can be performed without increasing the load on the playback device Loses.

Further, according to the present invention, by providing bidirectional communication between a playback device and an output device, a playback operation operation command is received from an output device in an image playback process and is transmitted to a playback device via an HDMI dongle, It is possible to obtain the effect of controlling the operation of the vehicle.

Thus, according to the present invention, when the reproducing apparatus and the output apparatus are provided apart from each other, the operation of the reproducing apparatus can be easily controlled without the user moving to the reproducing apparatus.

1 is a configuration diagram of an HDMI dongle, a playback device, and an output device according to a preferred embodiment of the present invention;
FIG. 2 is a block diagram of the HDMI dongle shown in FIG. 1;
3 is a block diagram of a receiver connected to a receiver or output device provided in an output device,
4 is a block diagram of an HDMI dongle and a playback apparatus according to another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method of controlling an HDMI dongle according to a preferred embodiment of the present invention.

Hereinafter, an HDMI dongle according to a preferred embodiment of the present invention and a control method thereof will be described in detail with reference to the accompanying drawings.

FIG. 1 is a configuration diagram of an HDMI dongle, a playback device, and an output device according to a preferred embodiment of the present invention, and FIG. 2 is a block diagram of the HDMI dongle shown in FIG.

In the present embodiment, the audio and video signals reproduced by the portable computer provided in the reproducing apparatus 10 are transmitted via Wi-Fi and transmitted to an output device 20 having a signal receiving function via Wi-Fi, for example, a smart TV .

However, the present invention is not necessarily limited thereto, and various terminals such as a mobile device such as a smart phone or a tablet PC provided with an HDMI port as well as a portable computer may be used as the playback device 10, It should be noted that various large display devices having a screen larger than the screen of the player device such as a monitor can be applied as the output device 20. [

1, the HDMI dongle according to the preferred embodiment of the present invention includes a first port 31 coupled to an HDMI port provided in the playback device 10, A signal conversion module 33 connected to the second port unit 32 and the first port unit 31 and adapted to convert the audio and video signals received from the playback apparatus 10 into the HDMI standard to a Mobile Industry Processor Interface (MIPI) standard, A communication module 34 for communicating with the output device 20 and the playback device 10, and a communication module 34 for encoding the converted voice and video signals and packetizing the encoded voice and video signals, To the output device 20 via the user input back channel (UIBC) to control the operation of the playback device 10 and to transmit the operation command to the playback device 10 And a control unit 35 for controlling the control unit.

Further, the HDMI dongle 30 according to the preferred embodiment of the present invention may further include a memory 36 for storing a driving program for performing a mirroring function.

The memory 36 may be an SPI flash memory that communicates with the control unit 35 through a SPI (Serial Peripheral Interface).

The driving program selects the output device 20 to perform mirroring using Received Signal Strength Indication (RSSI), and can immediately execute the mirroring function in the selected output device 20 without setting a separate button or mode have.

The drive program can extract and decode the key code of the operation command received from the output device 20. [

That is, according to the present invention, when an operation command is input from an input device such as a remote control or a smart phone to control the operation of the playback device, the audio and video signals output from the playback device are transmitted to the output device, Receives the operation command through communication, extracts the key code of the operation command through the second port unit, decodes it, and transmits it to the reproduction apparatus.

Here, the playback apparatus 10 includes a storage unit (not shown) for storing the key code of an operation command input from the input device such as a remote controller or a smart phone into the output device 20 in order to control the operation of the playback device 10. [ (Not shown) for performing Bluetooth communication with the HDMI dongle 30 and a Bluetooth module (not shown) for performing Bluetooth communication with the HDMI dongle 30, searches for a key code corresponding to an operation command received from the stored key code, A daemon or an application is installed to perform the operation.

Accordingly, the present invention can control the operation of the reproducing apparatus by using a remote controller or a smart phone that controls the operation of the output apparatus by providing bidirectional communication between the reproducing apparatus and the output apparatus.

Thus, the present invention can easily control the operation of the reproducing apparatus without moving the reproducing apparatus to the reproducing apparatus when the reproducing apparatus and the output apparatus are provided apart from each other.

The first port 31 is formed in a shape corresponding to one of various standard HDMI ports such as a standard HDMI port, a mini HDMI port, and a micro HDMI port, And may further include a conversion gender (not shown).

The second port unit 32 may be provided as a USB port connected to a USB port provided in the playback apparatus 10. [

The second port unit 32 receives the driving power for driving the HDMI dongle 30 from the playback device 10 and can transmit the operation command received from the output device 20 to the playback device 10 .

The signal conversion module 33 may be provided with a high quality conversion interface bridge chip (hereinafter abbreviated as a bridge chip) for converting the audio and video signals of the HDMI standard into the MIPI CSI-2 standard.

The bridge chip has a structure of 1Gbps lane, MIPI CSI-2 interface 2 link, and 27MHz HDMI. The 4K Ultra HD 3840x2160 image is divided into two parts and output to two MIPI CSI-2 links and converted into a 60 frame 4K image Can be output.

The signal conversion module 33 may support I2S, TDM, and SLIMbus conversion.

For example, the first port unit 31 can transmit audio and video signals of the HDMI standard from the playback device 10 to the signal conversion module 33 in the form of TMDS (Transition Minimized Differential Signaling) .

The TMDS transmits video, voice, and other data using one of three modes: 'video data period', 'data island period', and 'control period'.

In the video data period, video data is transmitted, and the data island period may occur in a horizontal / vertical retrace period, in which voice and other data are divided into a plurality of packets and transmitted. The control period occurs between the video data period and the data period.

Here, HDMI uses TMDS to transmit 10-bit data using the 8b / 10b encoding method during the video data period and 2b / 10b encoding during the control period.

In addition, HDMI can transmit voice and other data using 4b / 10b encoding by adding a data island period. In one data island period, 32 pixels of data may be transmitted and a 32-bit packet header describing the contents of the packet may be included.

The signal conversion module 33 receives the control signal from the control unit 35 in the I2C system and transmits the audio signal to the control unit 35 in the I2S (Inter-IC Sound or Integrated Interchip Sound) system.

The control unit 35 includes a voice encoder 41 for encoding a voice signal, a video encoder 42 for encoding the video signal, a packetizer 43 for dividing the encoded voice signal and the video signal into packets, And a controller 44 for controlling the controller.

The controller 44 executes the driving program to select the output device 20 to perform mirroring using Received Signal Strength Indication (RSSI), and controls the selected output device 20 without needing to set a separate button operation or mode, So that the mirroring function can be executed immediately.

The control unit 35 may include an H.264 encoder capable of transmitting video and audio signals with high quality at a low bit rate.

The H.264 encoder uses a high-level efficient video compression algorithm and an advanced video processing technique to drastically reduce the DTV transmission cost and efficiently use the bandwidth, thereby improving the image quality and bit rate Reduce the error rate, optimize the algorithm, reduce the encoding time delay, and increase the encoding efficiency.

For example, the speech encoder 41 may encode the speech signal through AAC (Advaced Audio Coding), and the image encoder 42 may encode the image signal using the H.264 codec.

The packetizer 43 can packetize the audio and video signals encoded in the H.264 format into packets of MPEG2-TS (Transprot Stream) format for transmission to the output device.

The packetized signal from the packetizer 43 is transmitted to the communication module 34 connected via USB.

The communication module 34 transmits packetized audio and video signals to the output device 20 through the control unit 35 and receives an operation command from the output device 20 via the UIBC (10).

To this end, the communication module 34 may include a Wi-Fi module 37 for performing Wi-Fi communication with the output device 20.

The communication module 34 may include a dual antenna 36 so as to be able to communicate using signals in a dual frequency band of 2.4 GHz and 5 GHz.

3 is a block diagram of a receiver connected to a receiver or output device provided in an output device.

3, the output device 20 includes a communication unit 21 for receiving a signal transmitted from the communication module 34 via Wi-Fi, and a demodulator for depacketizing and decoding the received signal, And a signal converting unit 22 for redirecting the signal.

Although the smart TV having the Wi-Fi receiving function is used as the output device 20 in the present embodiment, the present invention can be applied to a separate TV And may further include a receiver.

That is, the receiver includes a third port unit 23 connected to the HDMI port provided in the output device 20, a communication unit 21, and a signal conversion unit 22, and outputs the decoded, To the output device (20) through the HDMI port of the output device (20).

The control unit 35 can control the performance of the HDMI dongle 30 by negotiating the performance of the HDMI dongle 30 through communication with the output device 20 and maintenance of the session.

The output device 20 can receive an operation command from an input device such as a smart phone or a remote control.

To this end, the communication unit 21, together with the HDMI dongle 30 and the Wi-Fi unit 24 performing the Wi-Fi communication, is connected to the Bluetooth unit 25 for performing Bluetooth communication with the smartphone, And may further include a communication unit (26).

On the other hand, in the present embodiment, an operation command is received from the output device 20 using the WiFi module 37 provided in the communication module 34, and the operation command is extracted from the operation command through the second port portion 32 provided in the USB The key code is transmitted to the playback device 10, but the present invention is not limited thereto.

For example, FIG. 4 is a block diagram of an HDMI dongle and a playback device according to another embodiment of the present invention.

The HDMI dongle 30 according to another embodiment of the present invention may further include a Bluetooth module 38 for performing Bluetooth communication with the playback device 10. [

That is, the HDMI dongle 30 according to another embodiment of the present invention may be connected to the playback device (not shown) via the Bluetooth module 38 using a Bluetooth Socket Communication Daemon 39 based on Embedded Linux 10) can perform Bluetooth communication.

The Bluetooth socket communication daemon 39 is installed in the memory 36 and is executed under the control of the control unit 35 to connect the communication with the playback device 10.

To this end, the playback device 10 is also provided with a Bluetooth socket communication daemon 12 interlocked with the operating system 11, and the playback device 10 executes the Bluetooth socket communication daemon 12 to transmit the HDMI dongle 30 ), And can operate according to the received key code.

Next, a method of controlling an HDMI dongle according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

5 is a flowchart illustrating a method of controlling an HDMI dongle according to a preferred embodiment of the present invention.

The first port portion 31 of the HDMI dongle 30 is connected to the HDMI port of the portable computer provided in the playback apparatus 10 and the second port portion 32 is connected to the USB port And supplies power to each device of the HDMI dongle 30 by receiving power from the portable computer.

At this time, the control unit 35 loads and executes the drive program stored in the memory 36, and prepares an operation for transferring the audio and video output from the playback device 10 to the output device 20 in accordance with the drive program .

In step S12, the signal conversion module 33 converts the audio and video signals of the HDMI standard, which are transmitted through the first port unit 31, into the MIPI CSI-2 standard.

In step S14, the speech encoder 41 encodes the speech signal through the AAC, and the image encoder 42 encodes the image signal using the H.264 codec.

In step S16, the packetizer 43 divides the encoded voice signal and the video signal into packets and packets them into the MPEG2 TS format.

In step S18, the control unit 35 controls the communication module 34 to transmit the packetized signal to the output device 20 via Wi-Fi (S18).

At this time, the control unit 35 searches the output device 20, i.e., the TV using the RSSI, and selects the searched TV (S20).

Then, the control unit 35 transmits audio and video signals to the selected TV and starts streaming (S22).

At this time, the control unit 35 transmits a setup request signal using a real-time streaming protocol (RTSP), receives a setup response signal and a play request signal of the output device 20, A corresponding response signal can be generated and transmitted.

Then, the communication unit 21 of the receiver connected to the HDMI port of the output device 20 or the output device 20 receives the signal through the Wi-Fi, and the signal conversion unit 22 converts the received signal Decodes and displays the image on the screen of the output device 20 and outputs the voice through the speaker (S26).

On the other hand, in step S28, the output device 20 receives an operation command for controlling the operation of the playback device 10 from an input device such as a remote controller or a smart phone through the Bluetooth unit 25 or the infrared communication unit 26 .

Here, the operation command may be a pause, a stop, a playback, a fast forward and a fast backward information in a voice and video reproduction process.

The smart phone or the smart remote controller can display a key corresponding to each operation information on the touch screen or receive an operation command according to the operation of the corresponding key provided on the keypad.

On the other hand, in a general remote controller in which each operation information is not provided with a preset key, a numeric key provided on the keypad may be set to correspond to each operation information as described above.

Such an operation command input function can be set to be operable only in the mirroring mode.

The operation command for operating the playback device 10 can be changed and set using the drive program according to the convenience of the user.

If the operation command is not inputted in step S28, the output device 20 continuously outputs the audio and video received from the HDMI dongle 30 and waits until the operation command is input.

On the other hand, if the operation command in step S28 is input, the output device 20 transmits the key code of the operation command input through the Bluetooth unit 25 of the communication unit 21 to the HDMI dongle 30 in step S30.

Then, in step S32, the control unit 35 of the HDMI dongle 30 receives the key code of the operation command through the Bluetooth module 38, and extracts and decodes the received key code using the drive program.

Then, the control unit 35 transmits the decoded key code to the playback device 10 via the Bluetooth module 38 or the second port unit 32 (S34).

Accordingly, the playback device 10 receives the key code, and can perform a pause, stop playback, playback, fast forward, and fast reverse operations in accordance with the received key code (S36).

On the other hand, in step S38, the control unit 35 checks whether or not the audio and video reproduction ends or the HDMI dongle 30 is disconnected from the playback apparatus 10, and until the playback end or the HDMI dongle 30 is disconnected It is possible to perform control to repeat steps S12 to S38.

On the other hand, if playback of the HDMI dongle 30 is disconnected from the playback device 10 in step S38, the control unit 35 stops the operation of each device provided in the HDMI dongle 30 and terminates.

Through the above-described process, the present invention can transmit and output video and audio reproduced by a playback device using an HDMI dongle of a transmission system connected to the playback device to an output device provided with a large display device or the like.

The present invention can control the operation of the playback device through the output device by receiving the playback operation operation command from the input device in the output device during the image playback process and transmitting the command to the playback device through the HDMI dongle.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention relates to an apparatus and method for connecting an HDMI dongle of a transmission system to a playback apparatus and transmitting video and audio reproduced by the playback apparatus to an output apparatus provided by a large display apparatus or the like and outputting the operation command to the playback apparatus And is applied to the HDMI technology for controlling the operation of the playback device.

10: Playback device 11: Bluetooth socket communication daemon
20: output device 21: communication unit
22: signal conversion unit 23: third port unit
24: Wi-Fi unit 25: Bluetooth unit
26: Infrared unit 30: HDMI dongle
31: first port portion 32: second port portion
33: Signal conversion module 34: Communication module
35: control module 36: memory
37: WiFi module 38: Bluetooth module
39: Bluetooth Socket Communications Daemon
41: speech encoder 42: video encoder
43: Packetizer 44: Controller

Claims (13)

A first port portion coupled to the HDMI port provided in the playback apparatus,
A second port for receiving power from the playback device,
A signal conversion module connected to the first port unit and converting the audio and video signals received by the playback device from the HDMI standard to the MIPI standard,
A communication module for communicating with the output device and the playback device,
The audio and video signals converted by the signal conversion module are encoded, the encoded audio and video signals are packetized and transmitted to the output device through the communication module, and the operation of the playback device is controlled from the input device through the UIBC And a control unit for receiving an operation command input to the output device and controlling to transmit the operation command to the playback device,
The output device comprising: a communication unit for receiving a signal transmitted from the communication module via a Wi-Fi; and
And a signal conversion unit for depacketizing, decoding, and rendering the received signal,
Wherein the communication unit comprises: a Wi-Fi unit for communicating with the communication module;
A Bluetooth unit or an infrared communication unit performing communication with the input device,
A dongle device of a transmission system coupled to the playback device and performing WiFi communication with the output device through the communication module to transmit the audio and video signals reproduced by the playback device to the output device And extracts a key code of an operation command received through the output device from the input device, decodes the key code, and transmits the extracted key code to operate the reproduction device. The method according to claim 1,
Further comprising a memory for storing a drive program for performing a mirroring function,
Wherein the controller controls the output device to perform a mirroring function upon connection with the output device without executing a separate mode setting by executing the driving program. 3. The method of claim 2,
Wherein the communication module further comprises a Bluetooth module that communicates with the playback device and transmits a key code of an operation command,
Wherein the control unit controls to transmit the key code to the playback device via the Bluetooth module instead of the second port unit. The method of claim 3,
Wherein the playback device comprises: a storage unit for storing a key code of an operation command input from the input device to the output device in a database;
And a Bluetooth module for performing Bluetooth communication with the communication module,
Wherein the control unit executes a pre-installed daemon or an application to search for a key code received from the key code stored in the storage unit, and performs an operation corresponding to the search result. 5. The apparatus according to any one of claims 1 to 4, wherein the control unit
A voice encoder for encoding a voice signal via AAC,
A video encoder that encodes a video signal using an H.264 codec,
A packetizer for dividing the encoded voice signal and the video signal into packets, and
And a controller for controlling the operation of each device,
Wherein the controller executes the drive program to select an output device to perform mirroring using the RSSI and controls the selected output device to immediately execute the mirroring function without any button operation or mode setting. . delete 6. The method of claim 5,
The input device may be a smart phone or a remote control,
Wherein the operation command input from the input device is any one of a pause, a reproduction stop, a reproduction, a forward and a backward in the audio and video reproduction process in the reproduction device,
Wherein the input function of the operation command is set to be operable only in the mirroring mode. delete (a) receiving and encoding audio and video signals from a playback device in an HDMI dongle and transmitting the encoded and packetized audio and video signals to an output device; and
(b) receiving an operation command received through the UIBC from the HDMI dongle via the input device to the output device, and transmitting the received operation command to the playback device to control the operation of the playback device;
Wherein the step (a) includes the steps of: (a1) receiving the audio and video signals of the HDMI standard through the first port unit connected to the HDMI port of the playback device in the signal conversion module of the HDMI dongle,
(a2) encoding the converted voice and image signals using the AAC and H.264 codec, respectively, and
(a3) packetizing the audio and video signals respectively encoded by the control unit and transmitting them to the output device
(a4) receiving a signal transmitted from the HDMI dongle using a receiver connected to the HDMI port of the output device or the output device of the output device, depacketing and decoding the received signal to perform rendering, And outputting,
And an audio and video signal reproduced by the playback device is transmitted to the output device by performing WiFi communication with the output device through a communication module using a transmission type dongle device coupled to the playback device,
The step (b) includes the steps of (b1) receiving an operation command input from the input device to the output device in the communication module,
(b2) extracting and decoding a key code of the operation command by executing the drive program stored in the memory by the control unit,
(b3) transmitting the decoded key code to the playback device in the communication module; and
(b4) searching for an operation command corresponding to the key code received from the playback device, and performing an operation according to the retrieved operation command. delete delete delete 10. The method of claim 9,
Wherein the communication module transmits the key code to the playback device using a second port connected to the HDMI port of the playback device or a Bluetooth module provided in the communication module in step (b3) / RTI >
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