KR100641789B1 - Digital video broadcasting terrestrial receiver and method for vehicle - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television broadcast receiver, and more particularly, to a terrestrial digital television broadcasting receiver and method for a vehicle. Detects a signal, separates a video signal and an audio signal from the broadcast signal, generates a composite video banking sync signal, a super video signal, and a first video 601 signal from the video signal, and generates a stereo signal from the audio signal. A terrestrial digital television broadcasting module which generates and outputs a signal, a converter which receives the composite video banking sync signal and a super video signal, and generates and outputs a second super video signal, the first video 601 signal and a second video ( 601) Information about better signals by comparing signals A signal comparator for outputting a comparator signal indicating a signal, a selector for receiving the first video 601 signal and the second video 601 signal, and selectively outputting the selected video signal under predetermined control, and channel information of the selected channel; The microcomputer controls the terrestrial digital television broadcasting module and receives the comparator signal and outputs a selection signal to the selector.

DVB-T, IDB-1394, and Video 601 Signals

Description

Terrestrial digital television broadcasting receiver and method for vehicle {DIGITAL VIDEO BROADCASTING TERRESTRIAL RECEIVER AND METHOD FOR VEHICLE}             

1 is a diagram showing the configuration of a terrestrial digital television broadcast receiver according to an embodiment of the present invention.

2 is a flowchart illustrating a reception operation of a terrestrial digital television broadcast receiver according to an exemplary embodiment of the present invention.

The present invention relates to a television broadcast receiver, and more particularly, to an apparatus and method for terrestrial digital television broadcasting for a vehicle.

In general, an analog television broadcast receiver receives a broadcast signal transmitted to the air from a broadcast transmitting station or a repeater of a broadcasting station and displays it on a screen. Currently, the analog broadcast signal transmitted to the air is noisy or the strength of the signal is degraded by the buildings while being transmitted through the air to the analog television broadcast receiver.

In order to solve the problems of the analog broadcast signal, a digital broadcast scheme will be applied. This is because digital signals are more noise resistant than analog signals and have less signal distortion, so that a better signal can be obtained. Digital video broadcasting (DVB), which is a European method, of the digital broadcasting methods has the advantage of receiving a broadcast signal even in a driving vehicle by providing mobility. The DVB scheme includes a terrestrial digital television broadcasting (DVB-T) scheme using a base station of a general broadcasting station and a satellite digital television broadcasting (DVB-Satellite) scheme using a satellite.

As a digital broadcasting technology capable of receiving digital broadcasting signals in a driving vehicle as described above, a receiver capable of receiving a digital broadcasting signal transmitted by the DVB method in a moving vehicle is required.

Accordingly, an object of the present invention is to provide a terrestrial digital television broadcast receiver and method for a vehicle capable of receiving a digital broadcast signal in a vehicle.

The apparatus of the present invention for achieving the above object; In a vehicle terrestrial digital television broadcasting receiver, a digital broadcasting signal is received through an antenna, and under a predetermined control, a broadcasting signal for a predetermined channel is detected from the digital broadcasting signal, and a video signal and an audio signal from the broadcasting signal. And a terrestrial digital television broadcasting module for generating a composite video banking sync signal, a super video signal, and a first video 601 signal from the video signal, and generating and outputting a stereo signal from the audio signal. A converter that receives a banking sync signal and a super video signal and generates and outputs a second super video signal, and compares the first video 601 signal and the second video 601 signal to represent information about a superior signal. A signal comparator for outputting a comparator signal and the first video ( A selector for receiving the 601 signal and the second video 601 signal, and selectively outputting the predetermined signal under predetermined control; and having channel information on the selected channel, controlling the terrestrial digital television broadcasting module and receiving the comparator signal. Characterized in that the microcomputer for outputting the selection signal to the selector.

The method of the present invention for achieving the above object; A method for receiving a terrestrial digital television broadcast for a vehicle having a microcomputer having selected channel information, the method comprising: detecting a broadcast signal for a predetermined channel from a digital broadcast signal received through an antenna, and separating a video signal and an audio signal from the broadcast signal And generating a composite video banking sync signal, a super video signal, and a first video 601 signal from the video signal, generating a stereo signal from the audio signal, and performing the composite video banking sync signal. Receiving a super video signal and generating and outputting a second super video signal; comparing the first video signal 601 with the second video signal 601 to determine a better signal; The video 601 signal and the second video 601 signal are input and the best signal is determined. According to the features a constituted by any process of the first video 601 and the output selected one of the second video (601).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

1 is a diagram showing the configuration of a terrestrial digital television broadcast receiver according to an embodiment of the present invention. Hereinafter, a configuration of a DVB-T receiver according to the present invention will be described with reference to FIG. 1.

The microcomputer 103 is composed of a program memory for storing the control program and a memory for storing data such as channel information set when the power (not shown) is turned off to control the overall operation of the DVB-T receiver according to the present invention. .

The key input unit 117 includes a channel selection key and a volume key mode key, and generates key data for the corresponding key and outputs the key data to the microcomputer 103.

The DVB-T module 101 receives a digital broadcast signal received through an antenna ANT, detects and outputs only a broadcast signal of a desired channel from the digital broadcast signal under the control of the microcomputer 103, and outputs the digital broadcast signal. Separate video and audio signals included in radio signals. The DVB-T module 101 then performs a composite video banking sync (CVBS) signal, a super-video (S-Video) signal, and the know-how from the video signal. Generates and outputs a ratio (Red, Green, Blue: "RGB") signal and a Video 601 signal (Video (601)), and the Sony / Philips Digital Interface: Hereinafter, a signal and a stereo signal are generated and output.

Since the internal configuration and operation of the DVB-T module 101 are detailed in the European communication standard ETS 300.744, a detailed description thereof will be omitted.

The CVBS signal is a term indicating a type of television signal, and is a video signal, that is, a signal in which color difference, luminance, and sync are all mixed in one signal line. The S-Video signal is also referred to as a Y / C video signal or a component signal, and is an image signal that is transmitted by separating a light emission signal and a color signal in order to achieve a good image quality. The RGB signal is a signal in which R, G, B, and sink are all separated. The video 601 is composed of a digital luminance signal and two color difference signals. The luminance signal Y is sampled at 13.5 MHz, and the two color difference signals Cr and Cb are sampled at 6.75 MHz by sharing one luminance sample. Cr is R-Y, Cb is B-Y digitized signal. The CVBS signal, the S-Video signal, and the RGB signal are input to the video output unit 105.

The SPDIF signal is a signal obtained by converting an analog audio signal into a digital audio signal. The SPDIF signal and the stereo signal are input to the audio output unit 107.

The video output unit 105 is connected to an external device and outputs the CVBS signal, the S-Video signal, and the RGB signal to the external device. The audio output unit 107 is connected to an external device and outputs the SPDIF signal and the stereo signal to the external device.

The converter 109 receives the CVBS signal and the S-Video signal from the DVB-T module 101 and generates and outputs a video 601 signal from the CVBS signal and the S-Video signal. The signal comparator 111 is a video 601 signal (hereinafter referred to as a "first video 601 signal") output from the DVB-T module 101 and a video 601 signal output from the converter 109. (Hereinafter referred to as a "second video 601 signal") and the signal-to-noise ratio of the first video 601 signal and the second video 601 signal is compared to detect and detect a signal with a cleaner image quality The result is output to the microcomputer 103. The first video 601 signal and the second video 601 signal are broadcast signals for the same channel.

The selector 113 receives the first video 601 signal from the DVB-T module 101 and the second video 601 signal from the converter 109 and is controlled by the microcomputer 103. And one of the second video 601 signals is output.

The interface module 115 receives the video 601 signal selected by the selector 113, the stereo audio signal output from the DVB-T module 101, and the channel information from the microcomputer 103 according to a predetermined protocol. Convert it and send it on the network. The predetermined protocol applies an Intelligent Transportation System Data Bus 1394 (hereinafter referred to as "IDB 1394") protocol. The IDB 1394 protocol is a vehicular 1394 protocol. Typically, one IDB 1394 port may have 63 nodes. In other words, the IDB 1394 port can connect 63 external devices. Accordingly, the IDB 1394 protocol format signal including channel information, node information, audio signal, and video signal may be simultaneously transmitted to a plurality of external devices through the interface module 115.

1 illustrates a configuration of a vehicle digital broadcast receiver according to the present invention. 2 is a flowchart illustrating a reception operation of a terrestrial digital television broadcast receiver according to an embodiment of the present invention. Hereinafter, an operation of a vehicle digital broadcast receiver will be described with reference to FIGS. 1 to 2.

When the power supply is turned on, the microcomputer 103 receives a broadcast signal through the antenna ANT and the DVB-T module 101 (step 201). The microcomputer 103 reads the channel information stored when the power is turned off, and controls the DVB-T module 101 to detect a broadcast signal for the channel. The microcomputer 103 checks whether the channel selection key is input from the key input unit 117 at the same time as receiving the broadcast signal for the initial channel (step 203). If the channel selection key is input in this step, the broadcast signal for the input channel is detected (step 205). If not, the broadcast signal for the previous channel is continuously detected (step 207).

The DVB-T module 101 separates a video signal and an audio signal from the broadcast signal for the detected channel and generates a CVBS signal, an S-Video signal, an RGT signal, and a first video 601 signal from the broadcast signal. To print. The converter 109 receives the CVBS signal and the S-Video signal to generate and output a second video 601 signal. The signal comparator 111 receives the first video signal 601 and the second video signal 601 and outputs information on the video signal 601 having a signal having a higher quality to the microcomputer 103. Then, the microcomputer 103 monitors whether there is a signal input from the signal comparator 111 and checks whether a comparator signal having information about a video 601 signal having a good signal is input (step 209). If a signal is input from the signal comparator 111 in step 209. The microcomputer 103 outputs a selection signal for selecting the excellent video 601 signal input from the signal comparator 111 to the selector 113 to selectively output the corresponding video 601 signal (step 211). For example, if the first video 601 signal is superior to the second video 601 signal as a result of the comparison of the signal comparator 111, the microcomputer 103 may provide a comparator signal indicating that the first video 601 signal is excellent. The microcomputer 103 outputs a selection signal for selecting the first video 601 signal to the selector 113 according to the comparator signal.

When the video 601 signal is selected and output, the microcomputer 103 outputs channel information about the video 601 signal to the interface module 115. The interface module 115 receives the channel information, the video 601 signal, and the stereo signal and transmits the IDB-1394 format signal on the network.

As described above, the present invention has an advantage that digital television broadcasting (DVB-T) can be used to enjoy clearer digital broadcasting even in a running vehicle.                     

Furthermore, the present invention compares the video 601 signal generated by the DVB-T module with the video 601 signal generated by the CVBS signal and the S-Video signal to select and output a better signal for clearer digital broadcasting. There is an advantage to enjoy.

In addition, the present invention has the advantage that multi-channel broadcasting can be enjoyed by applying IDB 1394 as an interface module.

Claims (6)

In a vehicle terrestrial digital television broadcasting receiver, Receives a digital broadcast signal through an antenna, detects a broadcast signal for a channel stored in a power off state or a channel selected by a user under the control of a microcomputer, and receives a video signal and an audio signal from the broadcast signal. A terrestrial digital television broadcasting module for separating and generating a composite video banking sync signal, a super video signal, and a first video 601 signal from the video signal, and generating and outputting a stereo signal from the audio signal; A converter for receiving the composite video banking sync signal and the super video signal and generating and outputting a second video signal 601; A signal comparator for comparing the first video 601 signal with the second video 601 signal and outputting a comparator signal indicating information on a better signal; A selector which receives the first video signal 601 and the second video signal 601 and selectively outputs the microcomputer under the control of a microcomputer; And a microcomputer for controlling the terrestrial digital television broadcasting module having channel information on a selected channel and receiving the comparator signal and outputting a selection signal to the selector. delete The method of claim 1, It is connected to a plurality of external devices, receives channel information from the microcomputer, receives a video 601 signal output from a selector, receives a stereo signal from the terrestrial digital television broadcasting module, and receives the channel information and video 601 signals. And an interface module for outputting to the external devices in a format according to an IDB-1394 protocol including a stereo signal. In a vehicle terrestrial digital television broadcast receiving method comprising a microcomputer having selected channel information, Detecting a broadcast signal for a channel stored in a power off state or a channel selected by a user from a digital broadcast signal received through an antenna, and separating a video signal and an audio signal from the broadcast signal; Generating a composite video banking sync signal, a super video signal, and a first video 601 signal from the video signal; Generating a stereo signal from the audio signal; Receiving the composite video banking sync signal and the super video signal and generating and outputting a second video signal 601; Comparing the first video signal 601 with the second video signal 601 to determine a better signal; And receiving one of the first video signal 601 and the second video signal 601 and selectively outputting one of the first video 601 and the second video 601 according to the determination result of the even signal. Vehicle terrestrial digital television broadcasting receiving method, characterized in that. delete The method of claim 4, wherein And outputting over the network in a format according to an IDB-1394 protocol including the channel information, the video (601) signal and the stereo signal.

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