KR100713440B1 - Bluetooth system for transmitting multimedia data external device from mobile terminal and method thereof - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a Bluetooth system.

2. The technical problem to be solved by the invention

An object of the present invention is to provide a Bluetooth system and method using a Bluetooth gateway device and a dongle for transmitting multimedia data of a portable terminal equipped with a Bluetooth module to an external device without a Bluetooth module.

3. Summary of the Solution of the Invention

The present invention is a Bluetooth system for transmitting multimedia data from a portable terminal to an external device, and outputting the multimedia data through a Bluetooth communication method by a user's input. Portable terminal for; When the multimedia data is received from the portable terminal, the received multimedia data is classified into audio data and video data according to a Bluetooth profile, the audio data is transmitted to an audio dongle, and the video data is transmitted to a video dongle. A Bluetooth Gateway device; An audio dongle for transmitting the received audio data to an external device when receiving audio data from the Bluetooth gateway device; And a video dongle for transmitting the received video data to an external device upon receiving video data from the Bluetooth gateway device.

4. Important uses of the invention

The present invention is used for multimedia data transmission of a portable terminal using Bluetooth.

 Bluetooth, Gateway, Multimedia, Dongle

Description

BLUETOOTH SYSTEM FOR TRANSMITTING MULTIMEDIA DATA EXTERNAL DEVICE FROM MOBILE TERMINAL AND METHOD THEREOF}

1 is a block diagram showing a Bluetooth system according to an embodiment of the present invention.

Figure 2 is a block diagram showing the configuration of a portable terminal having a Bluetooth module according to an embodiment of the present invention.

Figure 3 is a block diagram showing the configuration of a Bluetooth gateway device according to an embodiment of the present invention.

4 is a block diagram showing the configuration of an audio dongle according to an embodiment of the present invention.

5 is a block diagram showing the configuration of a video dongle according to an embodiment of the present invention.

6 is a flowchart illustrating an operation of a portable terminal for transmitting multimedia data to a Bluetooth gateway device according to an exemplary embodiment of the present invention.

7 is a flowchart illustrating operations of a Bluetooth gateway device according to an embodiment of the present invention.

8 is a flowchart illustrating an operation of an audio dongle according to an embodiment of the present invention.

9 is a flowchart illustrating operations of a video dongle according to an embodiment of the present invention.

The present invention relates to a Bluetooth system, and in particular, a Bluetooth system for transmitting multimedia data of a portable terminal equipped with a Bluetooth module to an external device without a Bluetooth module. And to a method thereof.

Recently, users' demand for multimedia is gradually increasing. As a result of this trend, multimedia services are emerging in mobile terminals such as PDAs (Smart Digital Assistants), smart phones, portable multimedia players (PMPs), and mobile communication terminals.

For example, a portable terminal equipped with an MP3 function has been released so that users can enjoy not only calls but also MP3 music through a mobile phone that is always carried with them, and can perform DMB broadcasting through a portable terminal equipped with a digital multimedia broadcasting (DMB) receiving module. You can watch.

The functions related to multimedia playback such as MP3 and DMB using the portable terminal have limitations that can be viewed through the small speaker or display window provided by the portable terminal, and the sound quality and image quality of the small speaker or display window provided by the portable terminal are portable. Compared to the external devices having a larger output than the terminal, for example, home theater, car audio, television, and the like, they are significantly lower.

In addition, users who want to watch multimedia with better sound quality and image quality than the small speaker or display window provided by the portable terminal can connect the portable terminal and the external device with a wire such as 3.5Φ A / V cable to connect the multimedia of the portable terminal to the external device. Watched.

However, the wired connection using 3.5Φ A / V cable between the portable terminal and the external device has a problem in that the wiring is very complicated when various electronic products are connected to each other, and the complicated wiring is not only aesthetically pleasing, It often provides the cause of a fire. In addition, in order to connect to an external device placed in a distant space, the connection line is very long, which causes inconvenience.

In addition, providing a short range wireless communication module in an external device for wireless connection between a portable terminal equipped with a short range wireless communication module such as Bluetooth and an external device that is not provided with a short range wireless communication module may increase costs.

The present invention has been proposed to solve the above problems, a Bluetooth system and method using a Bluetooth gateway device and a dongle for transmitting multimedia data of a portable terminal equipped with a Bluetooth module to an external device not provided with a Bluetooth module. The purpose is to provide.

The present invention for achieving the above object, in the Bluetooth system for transmitting the multimedia data (Data) from the portable terminal to the external device (Device), the multimedia data by the user's input A portable terminal for outputting via a Bluetooth communication method; When the multimedia data is received from the portable terminal, the received multimedia data is classified into audio data and video data according to a Bluetooth profile, the audio data is transmitted to an audio dongle, and the video data is transmitted to a video dongle. A Bluetooth Gateway device; An audio dongle for transmitting the received audio data to an external device when receiving audio data from the Bluetooth gateway device; And a video dongle that transmits the received video data to an external device when the video data is received from the Bluetooth gateway device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In an embodiment of the present invention, a portable terminal includes a personal digital assistant (PDA), a smart phone, a portable multimedia player, and a mobile communication terminal. The external device may include a home theater, a car audio, a television, and the like, capable of outputting multimedia.

In addition, in describing an embodiment of the present invention, the portable terminal includes a Bluetooth module for performing Bluetooth communication. However, short-range wireless communication methods such as Infrared Data Association (IrDA), Wireless Lan (LAN), and Swap (SWAP) are available in addition to the Bluetooth communication method depending on the manufacturer of the portable terminal and the user of the portable terminal. It will be apparent from the contents of the present invention that the module may be provided.

Since the technology for the infrared wireless communication, the wireless LAN, and the swap of the short range wireless communication method are already known, a detailed description thereof will be omitted.

Bluetooth, which is applied to an embodiment of the present invention, is a short-range wireless communication technology that can transmit information such as text data, voice data, and video data at a speed of up to 1 Mbps wirelessly at a distance of 10 m to 100 m. Hereinafter, a brief description of a communication method using Bluetooth.

Bluetooth devices that can communicate with each other by the Bluetooth communication method can establish a connection state through which operations such as Inquiry, Inquiry Scan, Page, and Page Scan can be performed. Configure. In this process, a master device and a slave device are determined according to their roles.

In order to configure a new connection state between Bluetooth devices, it is necessary to match an operation clock and a frequency pattern between the Bluetooth devices. Inquiry during the process of configuring the connection state refers to an operation of repeatedly transmitting the operating frequency from the master so that the slave device can match the frequency pattern with the master device. Inquiry scan is a process performed by the slave device to detect a received frequency and synchronize with the detected frequency. Page refers to the process of sending a clock signal from the master device so that the slave devices can match the operation clock of the master, and page scan refers to the slave device detecting and synchronizing the received clock. Through this process, a network formed by connecting one or more slave devices to a master device is called a piconet.

According to the currently proposed Bluetooth communication scheme, one master device in a piconet may perform communication with each other by connecting seven slave devices in an active state. In addition, in order to connect a new slave device to the piconet, the master device disengages the active connection to any one of the seven slave devices that are connected in the active state and performs an active communication connection with the new slave device. do.

1 is a block diagram illustrating a Bluetooth system according to an embodiment of the present invention.

Referring to FIG. 1, the portable terminal 101 is connected to the Bluetooth gateway device 102 in a Bluetooth communication method, and the Bluetooth gateway device 102 is connected to the external devices 105 and 106, the audio dongle 103, and the video. It is connected via the dongle 104.

In an embodiment of the present invention, the Bluetooth wireless communication method between the portable terminal 101, the Bluetooth gateway device 102, and the audio dongle 103 and the video dongle 104 supports point-to-point and point-to-multipoint connection. In addition, wireless communication according to the Bluetooth standard is performed between the portable terminal 101 including the Bluetooth module, the Bluetooth gateway device 102, and the audio dongle 103 and the video dongle 104.

Meanwhile, an interface called an HCI (Host Control Interface) is defined between Bluetooth modules, and a control command, a result thereof, and content data can be transmitted and received by exchanging a corresponding message packet. The HCI packet is divided into a command, an event, and a data packet. Among them, the command packet provides various commands to variously utilize the Bluetooth module.

Looking at the configuration of the Bluetooth system shown in Figure 1 in more detail, first, the portable terminal 101 is a PDA (Personal Digital Assistant), a smart phone (Smart Phone), PMP (Portable Multimedia Player) and a mobile communication terminal (Multimedia service) Mobile Communication Terminal) and equipped with a Bluetooth module.

When the portable terminal 101 outputs multimedia data from the user to the external devices 105 and 106 among the multimedia data output such as DMB (Digital Multimedia Broadcasting), the portable terminal 101 and the Bluetooth gateway device 102 through the Bluetooth module. Try a wireless connection. When the wireless connection with the Bluetooth gateway device 102 is made, the multimedia data being output is separated into audio data and video data.

If the multimedia data is audio data without video data such as MP3 (MPEG Audio Layer-3), WMA (WMA; Window Media Audio), or video data without audio data such as still images, the audio data and video The process of separating into data is omitted.

In the multimedia data divided into the audio data and the video data, the audio data is transmitted to the Bluetooth gateway 102 according to the A2DP (Advanced Audio Distribution Profile) specification of the Bluetooth profile. Video data is transmitted to the Bluetooth gateway 102 in accordance with the provisions of the Video Distribution Profile (VDP) of the Bluetooth profile. Here, the Bluetooth profile is a definition of the protocol arrangement for each Bluetooth application. As a definition of the protocol arrangement for each Bluetooth application, the interoperability between Bluetooth products of different manufacturers is defined. ) Can be secured.

Among them, there are A2DP profile and VDP profile related to transmission of multimedia data. First, the A2DP profile focuses on audio data transmission of multimedia data. Although the recommended codec is SBC (Sub Band Codec), MP3 (MPEG Audio Layer-3) and WMA (WMA; Window Media) are selected. Audio (Advanced Audio Coding) and AMR (Adaptive Multi-Rate) are also available. In an embodiment of the present invention, the audio data is encoded by the SBC (Sub Band Codec) codec and transmitted to the Bluetooth gateway device 102 in the form of streaming. The VDP profile focuses on the transmission of video data of multimedia data, and the recommended codecs include H.263 and Moving Picture Experts Group-4 (MPEG-4). It is encoded and sent to the Bluetooth gateway device 102 in the form of streaming.

In addition, when the portable terminal 101 transmits audio and video streaming data to the Bluetooth gateway device 102, the Bluetooth gateway device 102 may be configured to synchronize the playback of the audio data and the video data. Timeline information included in the VDP profile is included in the streaming data and transmitted. In this case, the timeline information indicates a reproduction time of audio and video data.

The Bluetooth gateway device 102 receives audio and video data in the form of streaming received from the portable terminal 101 through the provision of the A2DP profile and the VDP profile of Bluetooth, and converts the audio data into the A2DP profile and the video data of the VDP profile. After the classification, the audio data of the A2DP profile is transferred to the audio dongle 103 and the video data of the VDP profile is transferred to the video dongle 104 among the classified data.

In an embodiment of the present invention, the Bluetooth gateway device 102 is always in a pairing standby state, and allows multiple pairing, connection, and transmission. In addition, when the audio dongle 103 and the video dongle 104 are separated from the Bluetooth gateway device 102 and connected to the external devices 105 and 106, an attempt is made to pair the audio dongle 103 and the video dongle 104. If a pairing connection is not established between the audio dongle 103 and the video dongle 104, pairing is attempted according to a predetermined number of times, and the state is displayed on the display unit of the Bluetooth gateway device 102.

The Bluetooth gateway device 102 is paired with the audio dongle 103 and the video dongle 104, and the audio and video in the form of streaming received from the portable terminal 101 through the provision of the A2DP profile and the VDP profile of Bluetooth. Once the data is input, the Bluetooth gateway device 102 delivers the audio data of the A2DP profile to the audio dongle 103 and the video dongle 104 to the audio dongle 103 and the video dongle 104. To pass.

In addition, when the Bluetooth gateway device 102 simultaneously receives different multimedia from various portable terminals, the Bluetooth gateway device 102 may select a specific multimedia selected by the user and transmit the selected multimedia to the audio dongle 103 and the video dongle 104.

The audio dongle 103 and the video dongle 104 may be supplied with power through a dongle input unit provided in the Bluetooth gateway device 102. When the Bluetooth gateway device 102 checks the power states of the audio dongle 103 and the video dongle 104 input through the dongle input unit and completes the power charging, the Bluetooth gateway device 102 may cut off the power of the audio dongle 103 and the video dongle. have. On the other hand, when the power supply is disconnected from the Bluetooth gateway device 102, the audio dongle 103 and the video dongle 104 release the pairing, cut off the power, or switch to the deep sleep mode, which wastes unnecessary power. To prevent.

In addition, when the audio dongle 103 is disconnected from the Bluetooth gateway device 102 and connected to the external device 105, the audio dongle 103 is switched to a pairing standby state. When receiving audio data of the A2DP profile from the Bluetooth gateway device 102, the audio data of the audio dongle 103 is decoded after the received audio data is synchronized with the video data of the video dongle 104. Via the external device 105 for outputting audio data.

When the video dongle 104 is disconnected from the Bluetooth gateway device 102 and connected to the external device 105, the video dongle 104 is switched to a pairing standby state. When the video data of the VDP profile is received from the Bluetooth gateway device 102, the received video data is decoded and synchronized with the audio data of the audio dongle 103, and then the input terminal of the video dongle 104 is provided. The data is transmitted to an external device 106 that outputs video data.

Here, the method of synchronizing the reproduction of audio data and video data decoded by the audio dongle 103 and the video dongle 104 is performed after the decoding process of each data in the audio dongle 103 and the video dongle 104. This is accomplished by transmitting and receiving timeline information of A2DP profile and VDP profile included in audio data and video data.

Also, the audio data and the video data which have been decoded by the audio decoder and the video decoder become uncompressed digital sound source data and uncompressed digital video data. The data converted into uncompressed digital sound source data and uncompressed digital video data are transmitted to the D / A converters of the dongles 103 and 104, respectively, and decoded into analog signals. The decoded audio data and video data are converted into respective dongle ( The signals are delivered to and output from the external devices 105 and 106 through input terminals provided in the 103 and 104, respectively. In an embodiment of the present invention, the input terminal portion connecting the external devices 105 and 106 and the dongles 103 and 104 is composed of audio and video AUX input terminals.

The user can transmit the multimedia data of the portable terminal 101 to the external devices 105 and 106 through the above method, and can watch the multimedia data of the portable terminal 101 through the external devices 105 and 106. do.

2 is a block diagram illustrating a configuration of a portable terminal having a Bluetooth module according to an embodiment of the present invention.

Referring to FIG. 2, the portable terminal 101 includes a Bluetooth module 201, a memory 202, a controller 203, a multimedia unit 204, a display unit 205, an audio processor 206, and a radio frequency (RF). The module 207 includes a key input unit 208 and a transceiver 209.

Looking at the configuration of the portable terminal 101 according to the present invention in more detail, first, the Bluetooth module 201 and the Bluetooth gateway device 102 to transmit the multimedia data of the portable terminal 101 to the Bluetooth gateway device (102) Configure data link to perform data communication.

An interface called an HCI (Host Control Interface) is defined between the portable terminal 101 and the Bluetooth module of the Bluetooth gateway device 102. By transmitting and receiving a message packet corresponding thereto, a control command and its result and content data can be transmitted and received. have. The HCI packet is divided into a command, an event, and a data packet, and among these, the command packet provides various commands to variously utilize the Bluetooth module 201.

The Bluetooth module 201 converts the audio and video data of the streaming form encoded according to the A2DP profile and the VDP profile of the Bluetooth from the multimedia unit 203 according to the Bluetooth communication standard, and converts the data into the RF module 207. To pass. In addition, the audio data and the video data include timeline information indicating a reproduction time point.

The RF module 207 modulates the audio and video data converted according to the Bluetooth communication standard received from the Bluetooth module 201 into an RF signal and transmits the converted RF signal to the Bluetooth gateway device 102.

The memory 202 stores various information necessary for controlling the operation of the portable terminal 101 for transmitting multimedia data to the external devices 105 and 106 according to an embodiment of the present invention.

The controller 203 controls the overall operation of the portable terminal 101 for transmitting multimedia data to the external devices 105 and 106 according to an embodiment of the present invention.

The controller 203 outputs the multimedia data from the user to the external devices 105 and 106 among the multimedia data output such as DMB (Digital Multimedia Broadcasting), and the Bluetooth gateway device 102 through the Bluetooth module 201. Control wireless connection with Bluetooth.

Meanwhile, when outputting multimedia data from the user to the external devices 105 and 106, the controller 203 disables the internal speaker and the display unit 205 provided in the portable terminal 101. You can disable it.

The controller 203 controls to transmit the multimedia data to the Bluetooth gateway device 102 that is wirelessly connected when the Bluetooth gateway device 102 is wirelessly connected. At this time, the controller 203 controls the multimedia unit 204 to separate the multimedia data into audio data and video data. The audio data is encoded using the SBC codec according to the provisions of the Bluetooth profile, and the video data is encoded using the MPEG-4 codec and controlled to be transmitted to the Bluetooth module 201.

The multimedia unit 204 separates the multimedia data into audio data and video data under the control of the controller 203. The audio data is encoded by the SBC codec, and the video data is encoded by the MPEG-4 codec and transmitted to the Bluetooth module 201.

In addition, the multimedia unit 204, for example, in the case of a portable terminal equipped with a DMB broadcast receiving module, if there is a digital broadcast request corresponding to a specific frequency (ie, a channel selected by the user) of a predetermined broadcasting station from the user, the controller 203 The digital broadcast frequency is set to a specific frequency under the control of. Accordingly, the portable terminal 101 can receive a digital broadcast signal of a broadcast station channel desired by the user.

The multimedia unit 204 demultiplexes the received digital broadcast signal into an audio data stream and an image data stream when outputting the digital broadcast signal received by the speaker and the display unit 205 provided in the portable terminal 101. The multimedia unit 204 decodes the audio data stream and the image data stream into an analog audio signal and an analog video signal, and outputs the decoded audio data to the speaker and the display unit 205 of the audio processor 206.

The display unit 205 outputs various display data generated by the portable terminal 101 and is preferably configured of a liquid crystal display (LCD) or the like capable of sufficiently supporting the resolution of the multimedia data. In this case, when the LCD is implemented using a touch screen method, the display unit 205 may operate as an input unit. The display unit 205 may be formed of a liquid crystal display (LCD) or the like, and displays multimedia data under the control of the controller 203.

The audio processor 206 modulates an electrical signal input from a microphone and converts the electrical signal into voice data, and demodulates the converted voice data into an electrical signal and outputs the same to a speaker. In addition, the audio processor 206 may include a codec for converting and playing a digital audio signal received by the RF module 207 into an analog signal or converting an analog audio signal generated from a microphone into a digital audio signal. desirable. The codec is composed of a data codec for processing packet data and an audio codec for processing audio signals such as voice. Such a codec may be included in the controller 203.

The key input unit 208 includes a numeric key and various function keys to transmit a key input signal corresponding to a key input by the user to the controller 203. The key input unit 208 may include a key set for the multimedia data output request to the external devices 105 and 106.

The transceiver 209 is a part which is connected to the mobile communication network to receive a call from the outside or attempts to make a call connection, and transmits various data to the base station through an antenna under the control of the controller 203, and receives the data received from the base station. Transfer to control unit 203.

3 is a block diagram illustrating a configuration of a Bluetooth gateway device according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the Bluetooth gateway device 102 may convert the multimedia data received from the gateway RF module 301 and the gateway RF module 301 to receive an RF signal of the multimedia data output from the portable terminal 101. Gateway control unit 302 for classifying according to profile, audio RF module unit 303 and video RF module unit 304 for transmitting the classified multimedia to audio dongle 103 and video dongle 104, audio dongle ( 103 and a dongle input unit 305 for receiving the input of the video dongle 104, a power source unit 306 for receiving power through a normal power cable, and a gateway display unit for displaying a pairing attempt state of the gateway device 102. 307 is configured.

Looking at the configuration of the Bluetooth gateway device 102 in more detail, first, the gateway RF module 301 receives the RF signal of the multimedia data output from the portable terminal 101 wirelessly connected by the Bluetooth communication method. In addition, the gateway RF module 301 transmits the received multimedia data to the gateway controller 302.

The gateway controller 302 receives multimedia data from the RF module 301 and classifies the multimedia data into audio data of the A2DP profile and video data of the VDP profile according to the Bluetooth profile, and the audio data of the classified A2DP profile is the audio RF module unit. And the video data of the VDP profile to the video RF module unit 304.

The audio RF module unit 303 transmits the audio data of the A2DP profile input from the gateway controller 302 to the audio dongle 103.

The video RF module unit 304 transmits the video data of the VDP profile transferred from the gateway controller 302 to the video dongle 104.

The dongle input unit 305 receives an input of an audio dongle 103 and a video dongle 104. According to an exemplary embodiment of the present invention, when the audio dongle 103 and the video dongle 104 do not perform a function for transmitting multimedia data to the external devices 105 and 106, the Bluetooth gateway device through the dongle input unit 305 ( 102) to charge the power.

The power supply unit 306 receives the power of the Bluetooth gateway device 102 through a normal power cable.

The gateway display unit 307 outputs various display data generated by the gateway device 102. In an embodiment of the present invention, the Bluetooth gateway device 102 is always in a pairing standby state, and allows multiple pairing, connection, and transmission. In addition, when the audio dongle 103 and the video dongle 104 are separated from the Bluetooth gateway device 102 and connected to the external devices 105 and 106, an attempt is made to pair the audio dongle 103 and the video dongle 104. If a pairing connection is not established between the audio dongle 103 and the video dongle 104, pairing is attempted according to a predetermined number of times, and the state is displayed on the gateway display unit 307 of the Bluetooth gateway device 102.

As described above, the Bluetooth gateway device 102 receives the audio data of the A2DP profile and the video data of the VDP profile from the portable terminal 101 according to the Bluetooth profile, classifies the audio data of the A2DP profile to the audio dongle 103. The video data of the VDP profile is transmitted to the video dongle 104.

In addition, the Bluetooth gateway device 102 supplies power to the audio dongle 103 and the video dongle 104, and when the audio dongle 103 and the video dongle 104 are connected to the external devices 105 and 106, An attempt is made to pair the audio dongle 103 and the video dongle 104.

4 is a block diagram showing the configuration of an audio dongle according to an embodiment of the present invention.

Referring to FIG. 4, an audio dongle 103 according to an embodiment of the present invention includes an audio dongle RF module 401 for receiving audio data of an A2DP profile from a Bluetooth gateway device 102, and an audio of an A2DP profile. An audio dongle decoder unit 403 for decoding data, an audio dongle D / A converter unit 405 for decoding the decoded audio data into an analog signal, and transmitting the audio data decoded as an analog signal to an external device 105. An audio dongle input terminal unit 406, an audio dongle power unit 407 for receiving power from the Bluetooth gateway device 102, and an audio dongle memory for storing various kinds of information necessary for operation control of the audio dongle 103 ( 404 and an audio dongle control unit 402 for controlling the operation of the audio dongle 103.

Looking at the configuration of the audio dongle 103 in more detail, first the audio dongle RF module unit 401 receives the audio data of the A2DP profile from the Bluetooth gateway device (102). The audio data of the received A2DP profile is transmitted to the audio dongle control unit 402.

When the audio data of the A2DP profile is input from the audio dongle RF module unit 401, the audio dongle control unit 402 controls the audio dongle decoder unit 403 to decode the audio data. In an embodiment of the present invention, the audio dongle decoder 403 for decoding audio data is configured as an SBC decoder. However, in addition to the SBC decoder, a decoder used to decode audio data according to the manufacturer and user's choice of the audio dongle 103 is MP3 (MPEG Audio Layer-3), WMA (WMA; Window Media Audio), and AAC (Advanced Audio Coding). And AMR (Adaptive Multi-Rate).

After the audio dongle decoder 403 performs the decoding process of the audio data, the audio dongle control unit 402 receives the timeline information of the A2DP profile included in the audio data through the audio dongle RF module unit 401. ), And receives the timeline information of the VDP profile included in the video data from the video dongle 104 to synchronize playback. In this way, the audio dongle 103 and the video dongle 104 can transmit and receive timeline information of the audio data and the video data, thereby synchronizing the reproduction of the data.

In addition, the audio dongle control unit 402 controls the audio dongle D / A converter unit 405 to decode the uncompressed digital sound source data of the audio data decoded by the audio dongle decoder unit 403 into an analog signal. The audio dongle control unit 402 controls the audio data decoded as an analog signal to be transmitted to the external device 105 through the audio dongle input terminal unit 406.

The audio dongle decoder 403 decodes the audio data input from the audio dongle control unit 402 under the control of the audio dongle control unit 402. In an embodiment of the present invention, the audio dongle decoder 403 for decoding audio data is configured as an SBC decoder. However, in addition to the SBC decoder, a decoder used to decode audio data according to the manufacturer and user's choice of the audio dongle 103 is MP3 (MPEG Audio Layer-3), WMA (WMA; Window Media Audio), and AAC (Advanced Audio Coding). And AMR (Adaptive Multi-Rate).

The audio dongle D / A converter 405 decodes the uncompressed digital sound source data of the audio data decoded by the audio dongle decoder 403 into an analog signal under the control of the audio dongle control unit 402. The audio data decoded as an analog signal by the audio dongle D / A converter 405 is transmitted to the external device 105 through the audio dongle input terminal 406 under the control of the audio dongle control unit 402.

The audio dongle memory 404 stores various kinds of information necessary for controlling the operation of the audio dongle 103. The audio dongle memory 404 stores the uncompressed digital sound source data of the audio data decoded by the audio dongle decoder 403, and when the timeline information of the VDP profile of the video data is received from the video dongle 104, Enables synchronization of data and playback.

The audio dongle input terminal unit 406 connects the audio dongle 103 and the external device 105. The audio dongle input terminal unit 406 transmits the audio data decoded into an analog signal by the audio dongle D / A converter unit 405 to the external device 105.

In addition, when connected to the Bluetooth gateway device 102 through the audio dongle input terminal unit 406, the power of the audio dongle 103 is supplied from the Bluetooth gateway device 102 to charge the battery of the audio dongle power unit 407. do. In an embodiment of the present invention, the audio dongle input terminal unit 406 is configured as an audio AUX input terminal.

The audio dongle power unit 407 receives power from the Bluetooth gateway device 102 through the audio dongle input terminal unit 406 to charge the battery of the audio dongle 103.

5 is a block diagram showing the configuration of a video dongle according to an embodiment of the present invention.

Referring to FIG. 5, the video dongle 104 according to an embodiment of the present invention includes a video dongle RF module unit 501 for receiving video data of a VDP profile from a Bluetooth gateway device 102, and a video of a received VDP profile. The video dongle decoder unit 503 for decoding data, the video dongle D / A converter unit 505 for decoding the decoded video data into an analog signal, and the video data decoded into the analog signal to the external device 106. The video dongle input terminal unit 506, the video dongle power unit 507 for receiving power from the Bluetooth gateway device 102, and a video dongle memory for storing various kinds of information necessary for controlling the operation of the video dongle 104 ( 504 and a video dongle control unit 502 for controlling the operation of the video dongle 104.

Looking at the configuration of the video dongle 104 in more detail, first the video dongle RF module unit 501 receives the video data of the VDP profile from the Bluetooth gateway device (102). The video data of the received VDP profile is transferred to the video dongle control unit 502.

When the video data of the VDP profile is input from the video dongle RF module unit 501, the video dongle control unit 502 controls the video dongle decoder unit 503 to decode the video data. In an embodiment of the present invention, the video dongle decoder 503 for decoding video data is made of MPEG-4. However, a decoder used to decode video data according to the manufacturer and user's choice of the video dongle 104 may use a decoder such as H.263 in addition to the MPEG-4 decoder.

After the video dongle decoder 503 performs the decoding process of the video data, the video dongle control unit 502 receives the timeline information of the VDP profile included in the video data through the video dongle RF module unit 501. ), And receives the timeline information of the A2DP profile included in the audio data from the audio dongle 103 to synchronize playback. In this way, the audio dongle 103 and the video dongle 104 can transmit and receive timeline information of the audio data and the video data, thereby synchronizing the reproduction of the data.

The video dongle control unit 502 also controls the video dongle D / A converter unit 505 to decode the uncompressed digital video data of the video data decoded by the video dongle decoder unit 503 into an analog signal. The video dongle control unit 502 controls the video data decoded as an analog signal to be transmitted to the external device 106 through the video dongle input terminal unit 506.

The video dongle decoder 503 decodes the video data input from the video dongle control unit 502 under the control of the video dongle control unit 502. In an embodiment of the present invention, the video dongle decoder unit 503 for decoding video data is an MPEG-4 decoder. However, a decoder used to decode audio data according to the manufacturer and user's choice of the video dongle 104 may use a decoder such as H.263 in addition to the MPEG-4 decoder.

The video dongle D / A converter 505 decodes the uncompressed digital video data of the video data decoded by the video dongle decoder 503 into an analog signal under the control of the video dongle controller 502. The video data decoded as an analog signal by the video dongle D / A converter 505 is transmitted to the external device 106 through the video dongle input terminal 506 under the control of the video dongle controller 502.

The video dongle memory 504 stores various kinds of information necessary for controlling the operation of the video dongle 104. The video dongle memory 504 stores uncompressed digital video data of video data decoded by the video dongle decoder 503, and when the timeline information of the A2DP profile of the audio data is received from the audio dongle 103, Enables synchronization of data and playback.

The video dongle input terminal unit 506 connects the video dongle 104 and the external device 106. The video dongle input terminal unit 506 transmits the video data decoded into an analog signal by the video dongle D / A converter unit 505 to the external device 106.

In addition, when connected to the Bluetooth gateway device 102 through the video dongle input terminal unit 506, the power of the video dongle 104 is supplied from the Bluetooth gateway device 102 to charge the battery of the video dongle power unit 507. do. In an embodiment of the present invention, the video dongle input terminal unit 506 is configured as a video AUX input terminal.

The video dongle power supply unit 507 receives power from the Bluetooth gateway device 102 through the video dongle input terminal unit 506 to charge the battery of the video dongle 104.

6 is a flowchart illustrating an operation of a portable terminal for transmitting multimedia data to a Bluetooth gateway device according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the controller 203 outputs multimedia data such as DMB through the speaker of the display unit 205 and the audio processor 206 (S601).

The controller 203 checks whether there is a multimedia data output request to the external devices 105 and 106 during the multimedia data output (S602). The user may request to output multimedia data to the external devices 105 and 106 through a menu key input of the key input unit 208 or a key input separately set.

If there is a request for outputting multimedia data, the controller 203 attempts a wireless connection with the at least one Bluetooth gateway device 102 through the Bluetooth module 201 (S603). In this case, the controller 203 may disable the speaker of the audio processor 206.

The controller 203 checks whether the Bluetooth module 201 is wirelessly connected to the Bluetooth gateway device 102 in a Bluetooth communication method (S604).

The controller 203 retries the wireless connection according to a preset cycle and the number of times if the wireless connection with the Bluetooth gateway device 102 is not wirelessly connected. The controller 203 outputs a message indicating that the wireless connection has failed for the set number of times. Do.

The controller 203 wirelessly connects the Bluetooth gateway device 102 to the Bluetooth gateway device 102 through the Bluetooth module 201 when the wireless connection with the Bluetooth gateway device 102 is performed in a wireless manner (S605).

In this case, the controller 203 may make a different process of transmitting the multimedia data during playback, which is briefly described as follows.

When the Bluetooth module 201 is wirelessly connected to the Bluetooth gateway device 102, the controller 203 separates the multimedia data being played by the multimedia unit 204 into audio data and video data.

If the multimedia data is audio data without video data such as MP3 (MPEG Audio Layer-3), WMA (WMA; Window Media Audio), or video data without audio data such as still images, the audio data and video The process of separating into data is omitted.

The separated audio data is transmitted to the Bluetooth gateway 102 according to the A2DP provision of the Bluetooth profile, and the video data is transmitted to the Bluetooth gateway 102 according to the provision of the VDP of the Bluetooth profile.

In addition, when transmitting the audio data and the video data from the portable terminal 101 to the Bluetooth gateway device 102, the timeline information included in the A2DP profile and the VDP profile is included to synchronize the reproduction of each data. send. In this case, the timeline information indicates a reproduction time of audio and video data.

Using the A2DP profile and the VDP profile, it is possible to transmit video data with high quality audio from the portable terminal 101 to the Bluetooth gateway device 102.

7 is a flowchart illustrating an operation of a Bluetooth gateway device according to an embodiment of the present invention.

Referring to FIG. 7, the Bluetooth gateway device 102 receives multimedia data from the portable terminal 101 wirelessly connected through the Bluetooth communication method (S701). When the multimedia data is received from the portable terminal 101, the gateway controller 302 classifies the data into audio data and video data according to the Bluetooth profile (S702).

The audio data and the video data classified according to the Bluetooth profile are transmitted to the audio dongle 103 and the video dongle 104 which are wirelessly connected through the Bluetooth communication method (S703).

8 is a flowchart illustrating an operation of an audio dongle according to an exemplary embodiment of the present invention.

Referring to FIG. 8, the audio dongle 103 receives audio data of an A2DP profile from a Bluetooth gateway device 102 wirelessly connected through a Bluetooth communication method (S801). The audio dongle 103 that has received the A2DP profile audio data from the Bluetooth gateway device 102 decodes the received audio data through the audio dongle decoder 403 (S802). The audio data decoded by the audio dongle decoder 403 is digital uncompressed sound source data.

The audio dongle control unit 402 synchronizes reproduction of audio data decoded by the audio dongle decoder unit 403 (S803). Here, in the audio dongle 103, the method of synchronizing the reproduction of audio data is performed by the audio dongle decoder 403 after decoding the audio data. The timeline information of the A2DP profile included in the audio data is determined by the audio dongle RF module unit ( The data is transmitted to the video dongle 104 through the 401, and timeline information of the VDP profile included in the video data is received from the video dongle 104, and the timeline information is transmitted and received with the video dongle 104 to reproduce the data. Be able to stay motivated.

The audio dongle control unit 402 controls the audio dongle D / A converter unit 405 to decode the uncompressed digital sound source data of the audio data whose reproduction synchronization is synchronized (S804). The audio data thus decoded into analog signals is transmitted to the external device 105 through the audio dongle input terminal unit 406 and outputted (S805). In an embodiment of the present invention, the audio dongle input terminal unit 406 connecting the external device 105 and the audio dongle 103 is composed of an audio AUX input terminal.

9 is a flowchart illustrating an operation of a video dongle according to an embodiment of the present invention.

Referring to FIG. 9, the video dongle 104 receives video data of a VDP profile from a Bluetooth gateway device 102 wirelessly connected in a Bluetooth communication manner (S901). The video dongle 104 that has received the video data of the VDP profile from the Bluetooth gateway device 102 decodes the received video data through the video dongle decoder 503 (S902). The video data decoded by the video dongle decoder 503 is digital uncompressed video data.

The video dongle control unit 502 synchronizes the reproduction of the video data decoded by the video dongle decoder unit 503 (S903). Here, the method of synchronizing the playback of the video data in the video dongle 104 is performed by the video dongle decoder 503 after decoding the video data. The timeline information of the VDP profile included in the video data is determined by the video dongle RF module unit ( Receives the timeline information of the A2DP profile included in the audio data from the audio dongle 103 and transmits and receives timeline information to and from the audio dongle 103 through the audio dongle 103, thereby reproducing the data. Be able to stay motivated.

The video dongle control unit 502 controls the video dongle D / A converter unit 505 to decode the uncompressed digital video data of the video data whose reproduction synchronization is synchronized (S904). The video data decoded as an analog signal is transmitted to the external device 106 through the video dongle input terminal unit 506 and outputted (S905). In an embodiment of the present invention, the video dongle input terminal unit 506 connecting the external device 106 and the video dongle 104 is formed of a video AUX input terminal.

Through the above method, the user transmits the multimedia data of the portable terminal 101 to the external devices 105 and 106 through the Bluetooth gateway device 102, the audio dongle 103, and the video dongle 104. The multimedia data of the portable terminal 101 can be viewed through the external devices 105 and 106.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited by the drawings.

As described above, the present invention, by providing a Bluetooth gateway device and audio and video dongle, it is possible to simply transmit the multimedia data of the portable terminal equipped with a Bluetooth module to external devices that are not equipped with a Bluetooth module, Bluetooth to external devices There is an effect that can provide a relatively low-cost solution than having a module.

Claims (15)

In a Bluetooth system for transmitting multimedia data from a portable terminal to an external device, A portable terminal for transmitting the multimedia data according to a bluetooth communication method; A Bluetooth gateway device which receives the multimedia data and classifies it into audio data and video data according to a Bluetooth profile, and transmits the audio data and the video data according to a Bluetooth communication method; An audio dongle for receiving the audio data and transmitting the received audio data to an external device not provided with a Bluetooth module; And a video dongle for receiving the video data and transmitting the video data to an external device not provided with a Bluetooth module. The method of claim 1, The portable terminal, Bluetooth system comprising a PDA (Personal Digital Assistant) equipped with a Bluetooth module (Module), a smart phone, a portable multimedia player (PMP) and a mobile communication terminal (Mobile Communication Terminal). The method of claim 1, The external device, Bluetooth system, characterized in that it comprises a home theater, a car audio, a television that can output multimedia without the Bluetooth module. The method of claim 1, The Bluetooth gateway device, A gateway RF module unit for receiving multimedia data from the portable terminal wirelessly connected through the Bluetooth communication method; A gateway controller classifying the multimedia data received from the gateway RF module unit into audio data and video data according to a Bluetooth profile; An audio RF module unit for receiving the classified audio data from the gateway controller and transmitting the received audio data to the received audio dongle; And And a video RF module unit for receiving the classified video data from the gateway controller and transmitting the received video data to the video dongle. The method of claim 4, wherein The gateway controller, And classifying the multimedia data input from the RF module unit into the audio data and the video data according to an A2DP (Advanced Audio Distribution Profile) and a VDP (Video Distribution Profile) of a Bluetooth profile. The method of claim 1, The Bluetooth profile is, Bluetooth system, characterized in that for defining the arrangement of protocol (Protocol) for each application of Bluetooth. The method of claim 1, The audio dongle, An audio dongle RF module unit for receiving the audio data from the Bluetooth gateway device; An audio dongle decoder unit for decoding audio data received through the audio dongle RF module unit; An audio dongle D / A converter for decoding the audio data decoded by the audio dongle decoder into an analog signal; And an audio dongle input terminal unit configured to transmit audio data decoded as an analog signal to an external device through the audio dongle D / A converter unit. The method of claim 7, wherein The audio dongle, And a controller configured to decode audio data received through the audio dongle RF module unit, decode the analog data, and transmit the decoded audio data to the external device. The method of claim 7, wherein The audio dongle input terminal unit, And an audio AUX input terminal for connecting the external device to the audio dongle. The method of claim 1, The video dongle, A video dongle RF module unit for receiving the video data from the Bluetooth gateway device; A video dongle decoder unit for decoding the video data received through the video dongle RF module unit; A video dongle D / A converter for decoding the video data decoded by the video dongle decoder into an analog signal; And a video dongle input terminal unit for transmitting video data decoded as an analog signal to an external device through the video dongle D / A converter unit. The method of claim 10, The video dongle, And a controller which decodes the video data received through the video dongle RF module unit, decodes the analog data, and transmits the decoded video data to the external device. The method of claim 10, The video dongle input terminal unit, And a video AUX input terminal for connecting the external device and the video dongle.  In a Bluetooth system for transmitting multimedia data from a portable terminal to an external device, a method of transmitting the multimedia data, Transmitting multimedia data of the portable terminal to a Bluetooth gateway device according to a Bluetooth communication method; Receiving the multimedia data and classifying the audio data and the video data according to a Bluetooth profile; Transmitting the classified audio data and video data to an audio dongle and a video dongle, respectively; Receiving and decoding the audio data and the video data, and synchronizing the reproduction synchronization of the decoded audio data and the video data, and then decoding the analog data and transmitting them to an external device not equipped with a Bluetooth module. A method for transmitting multimedia data. The method of claim 13, The process of synchronizing the reproduction of the decoded audio data and video data, And transmitting and receiving the timeline information included in the A2DP profile and the VDP profile of the Bluetooth profile by transmitting and receiving the audio dongle and the video dongle. The method of claim 13, The timeline information, And a playback time point of the audio data and the video data.

Images