KR20000044696A - Apparatus for selecting automatically frequency of mobile receiver and method for controlling the same - Google Patents

Abstract

PURPOSE: An apparatus for selecting automatically a frequency of a mobile receiver and a method for controlling the same are provided to switch a current received broadcasting channel to a broadcasting channel nearest to a current location of a vehicle when reception status of the current received broadcasting channel is poor. CONSTITUTION: An apparatus for selecting automatically a frequency of a mobile receiver and a method controlling the same comprises a location detection portion, a storage portion, a receiving portion, and a channel switching portion. The location detection portion detects a current location of a vehicle. The storage portion stores channel data of a broadcasting station according to each area. The receiving portion receives television signals. The channel switching portion switches the current received television channel to a broadcasting station channel nearest to the current broadcasting channel when the current received television signal is a bad status.

Description

Automatic frequency selection device for mobile receiver and its control method.

The present invention relates to an automatic frequency selection device for a mobile receiver and a control method thereof. More particularly, the present invention relates to an automatic frequency selection device and a control method for automatically selecting a frequency of a neighboring broadcasting station when a reception failure occurs in a moving state. It is about.

With the spread of automobiles, peripheral devices that can be used in automobiles are being developed in various forms. One such is the car navigation system and the car television.

The vehicle navigation system refers to a device that helps to safely drive a vehicle to a destination by identifying a current location and a final destination of the vehicle. Such a vehicle navigation system serves as a basic function to alleviate the burden on a human driving a vehicle. This basic function is expressed by detecting the position of the vehicle and displaying it on a map. Therefore, the range of movement by the car, the contents of the road, etc. should be extensive, and the place where the road density is high is quite high. In consideration of such a situation, the system is constructed based on the combination of independent navigation / movement trajectory and map.

In-vehicle televisions have the same functionality as home televisions that are now used around us a lot. That is, the vehicle television is a device that can watch television broadcast on the screen in a moving vehicle.

In addition, there are radios that can listen to radio broadcasts, and many peripheral devices that can be used in a vehicle continue to be developed.

On the other hand, in the vehicle television or radio, broadcasting stations are divided regionally. Thus, when watching a television broadcast while the vehicle is in motion, it is impossible to continuously receive the television channel broadcast received at the first departure point. So, if you want to watch TV with good quality continuously regardless of the movement of the region, every time the region is moved, you need to change the frequency to the channel of the closest station from where the vehicle is currently located so that you can get clear picture and sound quality. do.

Most viewers, however, only know the broadcast channels in the region they live for a long time, and most of the other channels do not. Therefore, even if the television reception becomes blind when moving, the frequency can not be changed quickly, so most users give up watching television broadcasts.

As described above, a vehicle television developed for mobile use has a result of failing to function as a television because the channel frequency used in each broadcasting station is regionally different, resulting in user dissatisfaction.

Thus, in order to solve the inconvenience of using the mobile receiver, the present invention is to be assisted by the vehicle navigation system currently used in the vehicle.

In other words, the present invention uses a vehicle navigation system to find a broadcast station with the most reception where the current vehicle is located, and to automatically induce a change to the broadcast channel of the broadcast station.

Accordingly, an object of the present invention is to provide an automatic frequency selection device for a mobile receiver and a control method thereof, which can automatically change the frequency of the mobile receiver.

1 is a block diagram of an automatic frequency selection device for a mobile receiver according to the present invention;

2 is an operation flowchart for automatic frequency control of a mobile receiver according to the present invention.

Explanation of symbols on the main parts of the drawings

5 GPS antenna unit 15 GPS tuner unit

20: Navigation Computer 25: CD-ROM Driver

30: CD-Map 50: Vehicle Navigation System

55: TV antenna unit 60: TV tuner unit

65 monitor unit 70 TV control unit

75: key control unit

According to an aspect of the present invention, there is provided an automatic frequency selection device for a mobile receiver comprising: position detecting means for detecting a current position of a vehicle; Storage means for storing channel data of a broadcasting station according to a region; Receiving means for receiving a television signal; And channel changing means for monitoring the reception state of the received television signal and automatically adjusting to a channel of a broadcasting station close to the current vehicle position when the screen is in a bad state.

An automatic frequency selection method for a mobile receiver according to the present invention for achieving the above object comprises the steps of: receiving a television signal; Monitoring whether the reception state of the television signal is good or bad; Detecting a location of a current vehicle; Recognizing channel data of a broadcasting station close to the detected position; And when the received television signal is in a bad state, automatically adjusting to a channel of a broadcasting station close to the current vehicle position.

An automatic frequency selection device of a mobile receiver of the present invention is characterized by using a GPS receiver in a vehicle navigation system to detect a current vehicle position.

In addition, the present invention is characterized by using the CD-Map in the vehicle navigation system to find the broadcast station closest to where the current vehicle is located.

Thereafter, the television control unit of the present invention is characterized in that after recognizing the channel frequency of the broadcasting station closest to the current vehicle position, the control unit changes to the same channel frequency as the channel currently being viewed by the user.

Hereinafter, with reference to the accompanying drawings will be described in detail an automatic frequency selection device and a control method of a mobile receiver according to the present invention.

1 is a block diagram of an automatic frequency selection device for a mobile receiver according to the present invention.

The present invention provides a CD-ROM driver (25) for driving a digital map from a GPS antenna unit (5) and a tuner unit (15) for receiving the current position of a vehicle from a GPS satellite, and a CD-Map (30) containing a digital map. And a navigation computer 20 for processing navigation functions. In other words, this configuration is the configuration of the vehicle navigation system 50.

Each of the above components operates as follows.

The GPS receivers 5 and 15 are position sensors for receiving an electric wave transmitted from a Global Positioning System (GPS) and positioning an absolute position of the host vehicle. It is interfaced to provide the vehicle's position, direction, time and navigation information.

The CD-ROM driver 25 is used to store map information of the navigation system because of its large storage capacity and ease of use. In particular, the CD-ROM driver 25 requires an error compensation circuit, an anti-noise measurement, and a floating structure to avoid vibration. In general, in order to reduce errors in high-speed data transmission, it is configured integrally with a navigation computer with a CPU, and data transmission with them is about 3 Mbps.

The navigation computer 20 has a circuit configuration similar to that of a personal computer, and includes a ROM, a RAM, a decoder circuit, an I / O circuit, a graphic generator, and the like, with a real-time OS connected thereto. Application software is built to control and process data like the human brain. In general, the navigation computer 20 performs functions such as positioning of the vehicle, displaying a map and the vehicle position on the display device, inputting signals from the sensor, inputting data from the CD-ROM driver 25, communication from the outside, and route guidance. Holds.

That is, the vehicle navigation system 50 recognizes the position of the host vehicle from the GPS through the GPS receivers 5 and 25 under the control of the navigation computer 20. In addition, through the CD-ROM driver 25, necessary information (for example, digital map) from the CD-Map 30 is read and provided to consumers. The CD-Map 30 is map data that stores location data of a national broadcasting station required by the present invention.

Next, the mobile receiver 80 is configured as follows.

An antenna unit 55 for receiving television broadcasts, a tuner unit 60 for tuning to a channel frequency specified by the user, a monitor unit 65 for displaying television broadcasts received from the tuner unit 60, and a user Key control unit 80 for inputting a key, and a TV control unit 70 for controlling the tuner unit 60 to recognize the selected channel through the key control unit 80 and to receive a television broadcast accordingly. .

The mobile receiver 80 configured as described above is operated as follows.

The user selects a broadcasting channel to be watched through the key operation unit 80 and inputs it to the television control unit 70. The television control unit 70 tunes the frequency of the tuner unit 60 so that the selected broadcast channel can be received.

After that, the television broadcast received through the antenna 55 is displayed on the monitor unit 65 and is provided to the user.

The navigation computer 20 and the television control unit 70 are connected via terminals 85 and 90. That is, the mobile receiver 80 and the vehicle navigation system 50 are connected through the terminals 85 and 90. The connection between the mobile receiver 80 and the vehicle navigation system 50 is to control the frequency change of the mobile receiver 80 according to the visual field.

In order to control such a frequency change of the mobile receiver 80, although not shown in the drawings of the present invention, memory means for storing channel data for broadcasting stations in each region of the country for automatic adjustment of the broadcasting channel is included. Should be. The memory means may be included in the television control unit 70, may be stored in the navigation computer 20, or may be provided as a separate peripheral device.

Next, a process of automatically changing a frequency according to a region with the help of a vehicle navigation system in a mobile receiver will be described with reference to FIG. 2.

2 is a flowchart illustrating an operation for automatic frequency change of a mobile receiver according to the present invention.

If the user wants to watch the television while the vehicle is in motion, power is supplied to the television through the key operation unit 70 (step 100), and the desired broadcast channel is selected. The selected broadcast channel is input to the television control unit 70.

The television control unit 70 adjusts the frequency of the television tuner unit 60 so that the broadcast selected by the user can be received. In this way, the broadcast selected by the user is received through the antenna 55, and the received television signal is displayed on the monitor unit 65 under the control of the control unit 70 (step 102).

On the other hand, the television control unit 70 checks the television signal received through the tuner unit 60 by a predetermined time unit. That is, by continuously monitoring the AGC voltage or the horizontal synchronizing signal of the television signal received through the tuner unit 60 by a predetermined time unit, the reception state of the television signal is determined (step 104).

If it is determined in step 104 that the reception state of the television signal is good, the television control unit 70 continues to control the reception of the television signal while maintaining the current channel (step 106).

However, if it is determined in step 104 that the reception state of the television signal is poor, the control signal for changing the frequency is transmitted to the navigation computer 20 through the terminal 90.

When the navigation computer 20 inputs a control signal for changing the frequency of the television control unit 70 through the terminal 85, the navigation computer 20 determines the current position of the vehicle through the GPS receivers 5 and 15. do. That is, the data according to the position of the current vehicle is read from the GPS receivers 5 and 15 (step 108).

After determining the position of the current vehicle from the GPS receiver in step 108, the navigation computer 20 searches for the broadcast station closest to the current position from the CD-Map 30. The TV control unit 70 recognizes the code corresponding to the broadcasting station.

When the television control unit 70 inputs data for the broadcasting station closest to the current vehicle location from the navigation computer 20, the television control unit 70 recognizes the channel frequency for the broadcasting station.

On the other hand, after the current position of the vehicle is detected in step 108, the TV controller 70 determines whether the user wants to receive the same broadcast continuously (step 110). If the user has made an operation of selecting the broadcast having the best reception state through the key operation unit 80 or the like, the television control unit 70 performs control accordingly.

That is, the television control unit 70 changes the channel frequency for the broadcasting station transmitted from the navigation computer 20 to the channel frequency having the best reception state (step 114).

However, when the user has not performed any operation in accordance with the channel change, the television control unit 70 determines that the user continues to watch the current broadcast. Accordingly, the frequency is changed from the channel frequency of the broadcasting station received from the navigation computer 20 to the same broadcast as the broadcast that the user was watching (step 112).

That is, after the 112th and 114th steps, the television signal of good quality is continuously received through the tuner unit 60, and the signal is displayed to the monitor unit 65 and is provided to the user.

That is, according to the present invention, if a reception state is poor depending on a region while watching a broadcast using a mobile receiver, the broadcasting frequency is automatically changed to receive a signal from a broadcasting station of the region.

That is, the present invention is supported by a vehicle navigation system currently mounted on a vehicle, but has a means for knowing the current position of the vehicle and data about a broadcasting station in the region without directly assisting the vehicle navigation system. If so, it is of course possible to receive good broadcasts.

As described above, the automatic frequency selection device and the control method of the mobile receiver according to the present invention, when the user watches television broadcasts while the vehicle is running, when the vehicle is located in the blind spot, the channel frequency is automatically By changing, it is possible to eliminate the hassle of use and to provide a user with a good quality broadcasting at all times.

Claims (4)

Position detecting means for detecting a current position of the vehicle; Storage means for storing channel data of a broadcasting station according to a region; Receiving means for receiving a television signal; And a channel changing means for monitoring the reception state of the received television signal and automatically adjusting to a channel of a broadcasting station close to the current vehicle position when the screen is in a bad state. The method of claim 1, And the position detecting means uses a GPS receiver. Receiving a television signal; Monitoring whether the reception state of the television signal is good or bad; Detecting a location of a current vehicle; Recognizing channel data of a broadcasting station close to the detected position; And automatically adjusting to a channel of a broadcasting station close to the current vehicle position when the received television signal is in a bad state. The method of claim 3, wherein And automatically adjusting the channel, selecting the same broadcast or a broadcast having the best reception condition according to a user's request.