KR100788610B1 - Dmb receiver equipped with navigation capability - Google Patents

Abstract

The present invention relates to a DMB receiving apparatus having a navigation function, comprising: an antenna for receiving a DMB signal and a GPS signal, respectively; A baseband converter converting the DMB signal and the GPS signal received from the antenna into a digital signal of the baseband; A DMB decoder which receives the DMB signal output from the baseband converter and decodes the DMB signal and outputs video / audio data and traffic information data; A navigation processor configured to restore GPS data in a coordinate form from a GPS signal output from the baseband converter and display the GPS data in a pre-stored map, and receive and display traffic information data from the DMB decoder on the map; An interface unit for receiving video / audio data output from the DMB decoder and graphic data of a map output from the navigation processor and converting the graphic data into a display signal or an audio signal according to each data format; A display unit for outputting a display signal output from the interface unit; It includes a speaker for outputting an audio signal output from the interface unit.

DMB, Navigation, Traffic Information, Data Broadcasting

Description

DMB receiver with navigation function {DMB RECEIVER EQUIPPED WITH NAVIGATION CAPABILITY}

1 is a block diagram of a DMB receiver according to the prior art.

2 is a block diagram of a DMB receiving apparatus equipped with a navigation function according to a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: antenna 120: tuner

130: A / D converter 140: demodulator

150: deinterleaver 160: audio decoder

170: data decoder 180: interface unit

190: control unit 200: DMB receiving device

210: DMB and GPS antenna 220: RF and DAB baseband portion

230: DMB multimedia decoder 240: interface unit

250: Navigation FPGA 260: Graphics Accelerator

270: flash memory 280: USB controller

290: CDMA module 310: display unit

320: speaker

The present invention relates to a car audio device, and more particularly, to a DMB receiving device having a navigation function.

The DMB service provides digital multimedia in a mobile environment such as a vehicle or a pedestrian. The DMB service can provide digital audio broadcasting (DAB) and broadcast of additional information, as well as high-definition digital video, and is based on the European DAB standard.

1 is a block diagram showing the configuration of the above-described DMB receiver according to the prior art, for example, disclosed in Korean Patent Laid-Open No. 2005-33304 "DMB Receiver" and the like.

As shown in FIG. 1, the DMB receiver receives an analog DMB signal through the antenna 110, and the tuner 120 tunes a channel to be watched and converts it into a baseband signal. The A / D converter 130 converts the analog baseband signal output from the tuner 120 into a digital signal, and the demodulator 140 then converts the digital signal output from the A / D converter 130 into a digital signal. Fast Fourier Transform (FFT) and differential demodulation.

Next, the de-interleaving unit 150 performs inverse interleaving on the output of the demodulator 23 in the time and frequency domain to restore the interleaved data to the pre-interleaving state. The audio decoder 160 and the data decoder 170 decode the output of the deinterleaving unit 150 and finally output the digital audio stream and the digital video stream.

The output interface unit 180 receives the above-described digital audio stream / digital video stream and provides the same to the display unit or the speaker (not shown above). For example, the output interface unit 180 may output an RGB signal, a DVI signal, or the like according to the interface method provided by the display unit. Conversion or filtering to improve the image quality.

However, in the DAB standard, additional information provided through ANNOUNCEMENT is defined, and such additional information includes traffic information, news, weather information, and sports information. In order to receive the additional information, the controller 190 selects additional information that matches the additional information input by the user from the ANNOUNCEMENT information of the broadcast signal in response to a user's command, and displays the additional information on the display unit (not shown). The audio decoder 160 and / or the data decoder 170 are controlled.

As described above, the conventional DMB receiver provides only a function of displaying traffic information broadcasting (TPEG or MOT) as simple data, thereby reducing visibility, and thus, it is difficult for a driver to immediately grasp while driving a vehicle.

In addition, most vehicles are equipped with a navigation device separately from the DMB receiver, but since the vehicle does not support interworking between the DMB receiver and the navigation device, there is a problem in that traffic information provided through the DMB service cannot be effectively utilized.

In order to solve the above problems, the present invention integrates a navigation function to the DMB receiver to more efficiently use traffic information broadcasting, and provides a DMB reception and navigation function with a simpler configuration by minimizing the required parts. Its purpose is to.

In order to achieve the above object, according to an aspect of the present invention, there is provided a DMB receiving apparatus with a navigation function, the antenna for receiving a DMB signal and a GPS signal, respectively; A baseband converter converting the DMB signal and the GPS signal received from the antenna into a digital signal of the baseband; A DMB decoder which receives the DMB signal output from the baseband converter and decodes the DMB signal and outputs video / audio data and traffic information data; A navigation processor configured to restore GPS data in a coordinate form from a GPS signal output from the baseband converter and display the GPS data in a pre-stored map, and receive and display traffic information data from the DMB decoder on the map; An interface unit for receiving video / audio data output from the DMB decoder and graphic data of a map output from the navigation processor and converting the graphic data into a display signal or an audio signal according to each data format; A display unit for outputting a display signal output from the interface unit; It includes a speaker for outputting an audio signal output from the interface unit.

At this time, preferably, a graphic accelerator for processing the map information stored in the navigation processing unit to generate the graphic data; A memory unit which stores the map information and traffic information data; A USB controller for accessing data stored in the memory unit; The apparatus may further include a CDMA module for wirelessly accessing data stored in the memory unit.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram showing the configuration of a DMB receiving apparatus with a navigation function according to a preferred embodiment of the present invention.

As shown in FIG. 2, the DMB receiving apparatus 200 having a navigation function according to an exemplary embodiment of the present invention includes a DMB and GPS antenna 210, an RF and DAB baseband unit 220, and a DMB multimedia decoder 230. ), An interface unit 240, a navigation FPGA 250, a graphics accelerator 260, a flash memory 270, a USB controller 280, a CDMA module 290, a display unit 310, and a speaker 320. It is.

First, the DMB and GPS antennas 210 may respectively receive a DMB signal and a GPS signal, and may include a plurality of antenna modules for receiving signals of different frequency bands, respectively.

The RF and DAB baseband unit 220 converts the DMB signal and the GPS signal received from the antenna 210 into digital signals of the baseband. For example, in the case of a DMB signal, a channel that a driver wants to watch can be tuned, down-converted into a baseband signal, and further, an analog baseband signal can be converted into a digital signal. In the case of GPS signals, GPS signals received from a plurality of satellites are processed and converted into baseband digital signals, so that GPS data in the form of coordinates can be extracted by the navigation FPGA 250 at a later stage.

Meanwhile, according to the design idea, the RF and DAB baseband unit 220 may additionally perform FFT conversion on the digitally converted DMB signal as described above, and in the case of the GPS signal, output GPS data in the form of coordinates. You may.

Next, the DMB multimedia decoder 230 receives the DMB signal output from the RF and DAB baseband unit 220, decodes the DMB signal, and outputs video / audio data and traffic information data (eg, TPEG or MOT data). In this case, the video / audio data output from the DMB multimedia decoder 230 is provided to the interface unit 240, and the traffic information data is provided to the interface unit 240 and / or the navigation FPGA 250.

Meanwhile, in a preferred embodiment of the present invention, the DMB multimedia decoder 230 is implemented in an SoC form including a processor, for example, an ARM (registered trademark) core, so that in addition to the above-described decoding function, each module in the DMB receiving device may be Control and data exchange can be mediated.

The interface unit 240 receives video / audio data output from the DMB multimedia decoder 230 and converts the video / audio data into a display signal and an audio signal, respectively. In addition, the interface unit 240 receives graphic data of the navigation map from the navigation FPGA 250 or the graphic accelerator 260 which will be described later, and converts the graphic data into a display signal. In this case, the interface unit 240 may convert the display signal into a form suitable for the interface standard of the display unit 310, and may further perform a filtering function for image / audio correction.

Accordingly, the interface 240 may selectively display the DMB broadcast image or the navigation map according to a user's operation command, and the traffic information data may be overlaid on the DMB broadcast image or displayed together on the navigation map.

The navigation FPGA 250 restores the GPS data in the form of coordinates from the GPS signals output from the RF and DAB baseband unit 220 and displays the GPS data in a pre-stored map. In addition, traffic information data may be received from the DMB multimedia decoder 230 and displayed on the map. In this case, the navigation FPGA 250 may extract location name or location information from the traffic information data and display the traffic information in a correspondence on the map. For example, when the traffic information data called "A road congestion" is received, the position corresponding to the "A" road in the map may be displayed in red or the like to clearly indicate the congestion section.

The graphic accelerator 260 processes (renders) map information on which GPS data and / or traffic information data is displayed by the navigation FPGA 250 and converts the map information into displayable graphic data. Graphic data rendered by the graphics accelerator 260 may be provided to the interface unit 240 sequentially through the navigation FPGA 250 and the DMB multimedia decoder 230, or may be directly provided to the interface unit 240.

The flash memory 270 stores the above-described map information and may store states before and / or after being processed by the navigation FPGA 250. In addition, the above-described GPS data and / or traffic information data may be stored in the flash memory 270. In this case, the flash memory 270 may be combined with the time information so as to identify a reception time.

The USB controller 280 is a means for accessing data stored in the flash memory 270, and may store data in or withdraw data from the flash memory 270.

The CDMA module 290 is connected to the aforementioned USB controller 280 to wirelessly access data stored in the flash memory 270, thereby enabling two-way wireless communication.

Meanwhile, the data input / output of the flash memory 270, the flash memory access by the USB controller 280, and the CDMA module 290 may be processed by a CPU core included in the DMB multimedia decoder 230.

Finally, the display unit 310 visually displays a display signal output from the interface unit 240, and the speaker 320 outputs an audio signal output from the interface unit 240.

Although the preferred embodiment according to the present invention has been described above, this is merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the protection scope of the present invention should be defined by the following claims.

As described above, according to the present invention, it is possible to more efficiently use the traffic information broadcast provided by the DMB service by implementing telematics by integrating a navigation function in the DMB receiver. In addition, by sharing the parts required for the DMB and navigation as much as possible, there is an additional advantage that the integrated implementation of the DMB reception and navigation functions more easily.

Claims (5)

DMB receiving device with a navigation function, An antenna for receiving a DMB signal and a GPS signal, respectively; A baseband converter converting the DMB signal and the GPS signal received from the antenna into a digital signal of the baseband; A DMB decoder for receiving a DMB signal output from the baseband converter, decoding the same, and outputting video / audio data and traffic information data; Reconstructing the GPS data in the form of coordinates from the GPS signal output from the baseband converter and displaying the coordinates on a map stored in advance, and a graphic of the traffic information corresponding position of the map based on the traffic information data received from the DMB decoder. A navigation processor for converting and displaying attributes; An interface unit for receiving video / audio data output from the DMB decoder and graphic data of a map output from the navigation processor and converting the graphic data into a display signal or an audio signal according to each data format; A display unit for outputting a display signal output from the interface unit; A speaker for outputting an audio signal output from the interface unit DMB receiving apparatus having a navigation function including a. The method of claim 1, A graphic accelerator for processing the map information stored in the navigation processor to generate the graphic data DMB receiving device with a navigation function further comprising. The method according to claim 1 or 2, A memory unit for storing the map information and traffic information data DMB receiving device with a navigation function further comprising. The method of claim 3, USB controller for accessing data stored in the memory unit DMB receiving device with a navigation function further comprising. The method of claim 3, CDMA module for wirelessly accessing data stored in the memory unit DMB receiving device with a navigation function further comprising a.

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