KR100754646B1 - Method for transmitting an audio signal detected from digital broadcasting signal in mobile terminal equipment - Google Patents

Abstract

According to an aspect of the present invention, there is provided an audio transmission method of a digital broadcasting reception mobile communication terminal including a short range wireless communication unit, the digital communication signal being received by the mobile communication terminal in a digital broadcasting output mode, and outputting through the output unit. If there is a request for outputting an audio signal to an external speaker device during signal output, wirelessly connecting the at least one external speaker device through the short range wireless communication unit, and wirelessly connecting the audio signal of the received digital broadcasting signal to the at least one external speaker. And transmitting to the device, and receiving and outputting the transmitted audio signal by the at least one external speaker device. Accordingly, the present invention wirelessly connects an external speaker device having a short range wireless communication unit such as Bluetooth and a mobile communication terminal for digital broadcast reception to transmit an audio signal of a digital broadcast signal received to the terminal to a wirelessly connected external speaker device. Since the transmitted audio signal is output through a wirelessly connected external speaker device, the user can listen to audio of better sound quality and sound when watching digital broadcasting.

Digital broadcast receiving terminal, transmission

Description

TECHNICAL FOR TRANSMITTING AN AUDIO SIGNAL DETECTED FROM DIGITAL BROADCASTING SIGNAL IN MOBILE TERMINAL EQUIPMENT}

1 is a block diagram illustrating a mobile communication terminal and an external speaker device according to an exemplary embodiment of the present invention.

2 is a block diagram illustrating a digital broadcast receiving mobile communication terminal according to an embodiment of the present invention.

3 is a flowchart illustrating an operation process of a mobile communication terminal for receiving digital broadcasts according to an embodiment of the present invention.

4 is a flowchart illustrating an operation process of a mobile communication terminal for receiving digital broadcasting according to another embodiment of the present invention.

The present invention relates to a mobile communication terminal for receiving digital broadcasts, and more particularly, to an audio transmission method of a mobile communication terminal for receiving digital broadcasts.

In general, digital broadcasting refers to a broadcasting service that provides a user with high quality, high sound quality, and higher service in place of a conventional analog broadcasting, and is classified into satellite digital broadcasting and terrestrial digital broadcasting.

 Satellite digital broadcasting is mainly intended for mobile services, and is a broadcast capable of watching multi-channel multimedia broadcasting anytime, anywhere through a portable receiver (mobile phone, personal digital assistant) or a vehicle receiver.

Terrestrial digital broadcasting, which is based on DAB (Digital Audio Broadcasting), is a concept of performing multimedia broadcasting for mobile reception using the VH channel 12, which is currently empty, and using TV, radio and data broadcasting using multiple channels. Means a broadcast that transmits a combination of the two. Conventional terrestrial operators operated one analog channel, but digital broadcasters have a concept of operating multiple digital channels, and these services are called ensemble.

In addition, in the terrestrial digital broadcasting, three ensembles can be transmitted in one VHF (Very High Frequency) channel, and one video, two audio, and one channel of data can be provided per ensemble. It aims at free broadcasting with the use in mind. Operators include Korean Broadcasting (KBS), Cultural Broadcasting (MBC), SBS (SBS), Digital Skynet, which provides audio channels to CBS, YTN, and Sky Life. Eight companies are preparing for business.

On the other hand, when a user generally watches a digital broadcast using a mobile terminal for receiving digital broadcasts, the audio is heard through a speaker built in the terminal.

However, since the speaker embedded in the terminal has a limit of its output, the volume of the audio sound output through the built-in speaker also has a limit, and the sound quality or the sound also has a large output (for example, a car audio speaker device). As a result, the user's dissatisfaction with the better sound quality and sound is expected.

Therefore, if the audio signal of the digital broadcast signal received by the digital broadcast receiving mobile communication terminal can be output through an external loud speaker device, the user's dissatisfaction as described above and user convenience can be increased.

Accordingly, an object of the present invention is to provide a method for outputting an audio signal of a digital broadcast signal received by a mobile communication terminal for digital broadcast reception through an external speaker device.

In order to achieve the above object, the present invention provides an audio transmission method of a digital broadcast receiving mobile communication terminal having a short range wireless communication unit, wherein the mobile communication terminal receives a digital broadcast signal in a digital broadcast output mode and outputs it through an output unit. And if there is a request for outputting an audio signal to an external speaker device during the digital broadcast signal output, wirelessly connecting the at least one external speaker device through the short range wireless communication unit, and the audio signal of the digital broadcast signal being received. And transmitting to the at least one external speaker device wirelessly connected, and receiving and outputting the transmitted audio signal by the at least one external speaker device.

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More preferably, in the audio transmission method of the digital broadcasting reception mobile communication terminal having a short range wireless communication unit, the step of stopping the transmission of the audio signal when a call is received while transmitting the audio signal to the at least one externally connected speaker device. And informing the incoming call of the call through the output unit.

The present invention also provides an audio transmission method of a digital broadcasting reception mobile communication terminal having a short range wireless communication unit, wherein the mobile communication terminal wirelessly connects to at least one external speaker device through the short range wireless communication unit in response to a user request. And transmitting an audio signal of a digital broadcast signal received in response to a digital broadcast output request to the at least one externally connected external speaker device, and wherein the at least one external speaker device receives the transmitted audio signal. Characterized in that the output process.

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More preferably, in the audio transmission method of the digital broadcasting reception mobile communication terminal having a short range wireless communication unit, the step of stopping the transmission of the audio signal when a call is received while transmitting the audio signal to the at least one externally connected speaker device. And, characterized in that it further comprises the process of notifying the incoming call.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram illustrating a mobile communication terminal and an external speaker device according to an exemplary embodiment of the present invention.

The illustrated mobile communication terminal 100 and the external speaker devices 200a, 200b, and 200c are assumed to perform Bluetooth communication. However, the mobile communication terminal 100 and the external speaker devices 200a, 200b, and 200c may be used not only for Bluetooth communication but also for short distance wireless communication such as infrared communication, the Internet, a general telephone network, and a mobile communication network. In addition, the external speaker devices 200a, 200b, and 200c include a short range wireless communication unit.

The Bluetooth wireless communication supports point-to-point and point-to-multipoint connection, and wireless communication between the mobile communication terminal 100 having a Bluetooth module and the external speaker devices 200a, 200b, and 200c according to the Bluetooth standard. This is done.

2 is a block diagram illustrating a digital broadcast receiving mobile communication terminal including a short range wireless communication unit according to an exemplary embodiment of the present invention.

The illustrated mobile communication terminal 100 for receiving a digital broadcast includes a short range wireless communication unit 110, a memory 120, a controller 130, a multimedia unit 140, a display unit 150, an audio processor 160, and a demodulator ( 170 and a digital broadcast receiver 180.

The short range wireless communication unit 110 performs a data communication by forming a data link with an external speaker device having a short range wireless communication means (for example, a Bluetooth module) to transmit an audio signal of a digital broadcast signal according to an embodiment of the present invention. And, it is preferably implemented to be detachable to the mobile communication terminal (100).

Meanwhile, an interface called an HCI (Host Control Interface) is defined between Bluetooth modules, and a control command, its result, and content data can be transmitted and received by exchanging message packets corresponding thereto. 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.

The memory 120 stores various necessary information necessary for controlling the operation of the mobile communication terminal 100 for receiving digital broadcasts according to an embodiment of the present invention.

The controller 130 (eg, the MSM) controls the overall operation of the mobile terminal 100 for receiving digital broadcasts according to an embodiment of the present invention. In addition, the controller 130 controls the digital broadcast signal received by the digital broadcast receiver 180 in the digital broadcast output mode to be output through the speaker of the display unit 150 and the audio processor 160. The digital broadcast signal may be either a digital multimedia broadcasting (DMB) signal or a digital audio broadcasting (DAB) signal.

The controller 130 controls to wirelessly connect to at least one external speaker device through the short range wireless communication unit 110 (eg, a Bluetooth module) when an audio signal output request from a user to the external speaker device is output during the digital broadcast signal output. . Of course, the external speaker device must also have a short range wireless communication unit. Meanwhile, the controller 130 may disable the internal speaker provided in the mobile communication terminal 100 when there is a request for outputting an audio signal from the user to the external speaker device during the digital broadcast signal output.

The controller 130 controls to transmit the audio signal of the digital broadcast signal received by the digital broadcast receiver 180 to the at least one externally connected external speaker device when the wireless speaker is wirelessly connected to the external speaker device. The transmitted audio signal is output through an external speaker device having a short range wireless communication unit.

On the other hand, if the user wants to output the audio signal of the digital broadcast signal from the beginning to the external speaker device (for example, the speaker provided in the audio system of the vehicle), the control unit 130 requests a user (that is, audio to the external speaker device) In response to the signal output request), a wireless connection with the external speaker device is attempted through the short range wireless communication unit 110. At least one external speaker device may be provided.

The controller 130 receives the digital broadcast signal to the digital broadcast receiver 180 when a user requests a digital broadcast output in a wirelessly connected state with an external speaker device, and the short range wireless communication unit 110 receives the audio signal of the received digital broadcast signal. ) To be transmitted to an external speaker device connected wirelessly. In this case, the controller 130 may not output the audio signal through the internal speaker provided in the terminal.

For example, when the multimedia unit 140 receives 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 multimedia unit 140 controls the frequency of the digital broadcasting receiver 180 under the control of the controller 130. Set to a specific frequency. Accordingly, the digital broadcast receiver 180 may receive a digital broadcast signal of a broadcast station channel desired by the user.

In addition, the multimedia unit 140 demultiplexes the digital broadcast signal demodulated by the demodulator 170 into the digital data stream and classifies the audio broadcast stream and the video data stream. In addition, the multimedia unit 140 decodes the audio data stream and the image data stream into an analog audio signal and an analog video signal, and then outputs them to the speaker and the display unit 150 of the audio processor 160. The speaker and the display unit 160 serve as an output unit in the mobile communication terminal 100 for receiving digital broadcasts according to an embodiment of the present invention.

Meanwhile, in the embodiment of the present invention, the multimedia unit 140 is separately provided, but the multimedia unit 140 may be implemented by being included in the controller 130.

The display unit 150 outputs various types of display data generated by the mobile communication terminal 100 for receiving digital broadcasts, and is preferably composed of a liquid crystal display (LCD) or the like capable of sufficiently supporting the resolution of the digital broadcast signal. In this case, when the LCD is implemented using a touch screen method, the display unit 150 may operate as an input unit. The display unit 150 may be formed of a liquid crystal display (LCD) or the like, and displays the digital broadcast signal received by the digital broadcast receiver 180 under the control of the controller 130.

The audio processor 160 may configure a codec, and the codec includes a data codec for processing packet data and an audio codec for processing an audio signal such as voice.

The audio processor 160 modulates the electrical signal input from the microphone and converts the electrical signal into voice data, and demodulates the encoded voice data input from the wireless transmitter / receiver (not shown) or the digital broadcast receiver 180 into the electrical signal. Output to speaker. In addition, the audio processor 160 converts and reproduces the digital audio signal received by the wireless transmitter / receiver (not shown) or the digital broadcast receiver 180 into an analog signal or converts an analog audio signal generated from a microphone into a digital audio signal. It is preferable to have a codec. The codec is composed of a data codec for processing packet data and the like and an audio codec for processing audio signals such as voice. The codec may be included in the controller 130.

The demodulator 170 demodulates the digital broadcast signal received by the digital broadcast receiver 180 into a digital data stream and outputs the demodulated signal to the multimedia unit 140. At this time

The demodulator 170 outputs the digital audio broadcast signal to the audio processor 160 under the control of the controller 130 when the digital broadcast signal is a digital audio broadcast signal. In this case, since the digital audio broadcast signal does not pass through the multimedia unit 140, the signal processing speed may be improved accordingly.

The digital broadcast receiver 180 receives a predetermined digital broadcast signal under the control of the controller 130 and outputs the received digital broadcast signal to the demodulator 170.

Meanwhile, although not shown in FIG. 2, the digital broadcasting reception mobile communication terminal 100 includes a key input for transmitting a key input signal corresponding to a key input by a user to the controller 130, having a numeric key and various function keys. The key input unit may include a key for digital broadcast output request or a key set for an audio signal output request to an external speaker device.

3 is a flowchart illustrating an operation process of a mobile communication terminal for receiving digital broadcasts according to an exemplary embodiment of the present invention.

2 and 3, the controller 130 outputs the digital broadcast signal received by the digital broadcast receiver 180 in the digital broadcast output mode through the speaker of the display unit 150 and the audio processor 160 (S110). ). The digital broadcast signal is either a digital multimedia broadcast signal or a digital audio broadcast signal.

The controller 130 checks whether there is an audio signal output request to an external speaker device during the digital broadcast signal output (S120). The user may request an audio signal output to an external speaker device through a menu key input of a key input unit (not shown) or a key input separately set.

When the request is made, the controller 130 attempts to wirelessly connect to at least one external speaker device through the short range wireless communication unit 110 (eg, a Bluetooth module) (S130). In this case, the controller 130 may disable the speaker of the audio processor 160. On the other hand, it is obvious that the external speaker device also includes a short range wireless communication unit.

The controller 130 checks whether the mobile communication terminal 100 for digital broadcast reception is wirelessly connected to the external speaker device through the short range wireless communication unit 110 (S140).

If the wireless connection with the external speaker device is not wirelessly connected, the controller 130 retries the wireless connection according to a preset cycle and number of times. If the wireless connection fails for a predetermined number of times, the controller 130 may output a message informing of this.

When the wireless connection with the external speaker device is wirelessly connected, the controller 130 transmits the audio signal of the digital broadcast signal being received by the digital broadcast receiver 180 to the at least one externally connected external speaker device through the short range wireless communication unit 110 ( S150). In this case, the controller 130 may perform a process of transmitting an audio signal differently according to the type of the digital broadcast signal being received.

First, the demodulator 170 includes a main service channel (MSC) including broadcast data for each sub-channel (ie, video channel, audio channel, and data channel) from the digital broadcast signal received by the digital broadcast receiver 180. The high speed information channel (FIC) indicating the information of the service channel is separated and transmitted to the controller 130. The main service channel includes broadcast data (ie, actual audio / video data).

If the digital broadcast signal being received is a digital audio broadcast signal, the controller 130 controls the demodulator 170 to transmit the digital audio broadcast signal directly to the multimedia unit 140 without analyzing the high speed information channel. The control unit 160 transmits the data to the processor 160 to transmit the short-range wireless communication unit 110 through the audio codec. Of course, the digital audio broadcast signal may be transmitted to the audio processor 160 via the multimedia unit 140.

On the other hand, if the received digital broadcast signal is a digital multimedia broadcast signal as a result of analyzing the high-speed information channel, the controller 130 broadcasts the data (ie, actual audio / video data) through a 13-bit PID (Program IDentifier) of a TS packet. ), The multimedia unit 140 is controlled to demultiplex the digital broadcast signal, and classified into an audio data stream and an image data stream. In addition, the controller 130 decodes the audio data stream and the video data stream into an analog audio signal and an analog video signal through the multimedia unit 140, and then outputs the video signal through the display unit 150, and the audio signal is audio. Output to the short-range wireless communication unit 110 through the codec.

Therefore, the external speaker device may receive and output the transmitted audio signal through a short range wireless communication unit.

The controller 130 stops transmission to the external speaker device when a call is received while the audio signal is being transmitted to the external speaker device through the short range wireless communication unit 110, and the audio processor 160 of the audio processor 160 transmits the call. It is preferable to notify that the call has been received through the speaker, and the call notification of the call may be a text message through the display unit 150.

4 is a flowchart illustrating an operation of a digital broadcasting reception mobile communication terminal according to another embodiment of the present invention. That is, FIG. 4 is a flowchart illustrating an operation process of a digital broadcast reception mobile terminal when a user wants to output an audio signal of a digital broadcast signal to an external speaker device (for example, a speaker provided in an audio system of a vehicle) from the beginning. to be.

2 and 4, the controller 130 checks whether there is a user request (ie, an audio signal output request to an external speaker device) (S210).

When the request is made, the controller 130 attempts to wirelessly connect with at least one external speaker device through the short range wireless communication unit 110 (S220).

The controller 130 checks whether the digital broadcasting reception mobile communication terminal 100 is wirelessly connected to the external speaker device through the short range wireless communication unit 110 as a result of the attempt (S230).

If there is a digital broadcast output request from the user in a state of wirelessly connecting with the external speaker device (S240), the controller 130 receives the corresponding digital broadcast signal through the digital broadcast receiver 180 (S250).

Subsequently, the controller 130 transmits the audio signal of the received digital broadcast signal to an external speaker device wirelessly connected through the short range wireless communication unit 110 (S260).

According to the above-described embodiments of the present invention, an external speaker device wirelessly connected to an audio signal of a digital broadcast signal received by the terminal by wirelessly connecting an external speaker device having a short range wireless communication unit such as Bluetooth and a mobile communication terminal for digital broadcast reception. This allows users to listen to audio with better sound quality and sound when watching digital broadcasts.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined not only by the claims but also by the equivalents of the claims.

As described above, the present invention wirelessly connects an external speaker device having a short range wireless communication unit such as Bluetooth and a mobile communication terminal for digital broadcast reception to transmit an audio signal of a digital broadcast signal received to the terminal to a wirelessly connected external speaker device. . Since the transmitted audio signal is output through a wirelessly connected external speaker device, the user can listen to audio of better sound quality and sound when watching digital broadcasting.

Claims (13)

delete delete In the audio transmission method of the digital broadcast receiving mobile communication terminal having a short-range wireless communication unit, Receiving and outputting a digital broadcast signal through an output unit by the mobile communication terminal in a digital broadcast output mode; If there is a request for outputting an audio signal to an external speaker device during the digital broadcasting signal output, wirelessly connecting at least one external speaker device through the short range wireless communication unit; Transmitting an audio signal of the received digital broadcast signal to the at least one externally connected external speaker device; And receiving and outputting the transmitted audio signal by the at least one external speaker device. The method of claim 3, Stopping transmission of the audio signal when a call is received while transmitting the audio signal to the at least one externally connected speaker; And informing the incoming call of the call through the output unit. The method of claim 3, The short range wireless communication unit is a Bluetooth module, characterized in that the audio transmission method of the mobile terminal for digital broadcast reception. The method of claim 3, And the digital broadcast signal is any one of a digital multimedia broadcast signal and a digital audio broadcast signal. The method of claim 3, wherein the wireless connection process And disabling an internal speaker provided in the mobile communication terminal when a user request is output while outputting the digital broadcast signal. delete delete In the audio transmission method of the digital broadcast receiving mobile communication terminal having a short-range wireless communication unit, In response to a user request, the mobile communication terminal wirelessly connecting to at least one external speaker device through the short range wireless communication unit; Transmitting an audio signal of a digital broadcast signal received in response to a digital broadcast output request to the at least one externally connected external speaker device; And receiving and outputting the transmitted audio signal by the at least one external speaker device. The method of claim 10, Stopping transmission of the audio signal when a call is received while transmitting the audio signal to the at least one externally connected speaker; And informing the incoming call of the call. The method of claim 10, The short range wireless communication unit is a Bluetooth module, characterized in that the audio transmission method of the mobile terminal for digital broadcast reception. The method of claim 10, And the digital broadcast signal is any one of a digital multimedia broadcast signal and a digital audio broadcast signal.

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