KR20000014997A - Method for tracking a broadcasting channel automatically - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs:

Channel auto tracking technology of radio system

I. The technical problem the invention is trying to solve:

Automatically track specific broadcasts having different broadcast frequencies in predetermined regions and always tune to the same broadcast frequency.

All. The gist of the solution of the invention:

A method for automatically tracking a broadcast channel in a radio device that receives a broadcast signal transmitted from a radio station by adding broadcast station unique identification information indicating its own broadcast station, the method comprising: identifying a currently selected broadcast channel through the broadcast station unique information. And searching whether a broadcast signal of the checked broadcast channel is received in another frequency band when the reception strength of the broadcast signal is out of a predetermined stable value, and broadcasting the checked broadcast channel in another frequency band during the search. When the signal is received, the process of tuning to the frequency.

la. Significant use of the invention: Applied to the automatic tracking of channels in radio systems.

Description

How to auto track channel

The present invention relates to a tuning apparatus for a radio system, and more particularly, to a method for automatically tracking a specific broadcast channel having a different channel frequency in a predetermined region.

Current broadcasts such as TV and radio broadcasts do not use the whole country as a frequency due to transmission output problems, and are divided into broadcast frequencies for each region. For example, broadcasting station A transmits the same broadcast program as the first frequency in the metropolitan area and the second frequency in the Yeongnam area. Therefore, if you move to the Yeongnam region while listening to A broadcast in the metropolitan area with a radio mounted on a moving object such as a vehicle, the radio in the vehicle must be tuned from the first frequency to the second frequency to continuously listen to the A broadcast.

Nowadays, if you don't know the broadcasting frequency of the new area after the move, you have to use the auto scan function to automatically scan the entire band of the radio. Even if you know, manual tuning while driving distracts the driver's attention. There was a problem that caused the risk of an accident. In addition, the method of using the auto-scan function when the broadcast channel is not caught due to the change of area also has to be inconvenient to use by repeatedly selecting the desired broadcast frequency.

Accordingly, an object of the present invention is to provide a method for automatically tracking a radio broadcast channel that automatically tracks a specific broadcast having a different broadcast frequency in a predetermined region and always tunes to the same broadcast frequency.

In order to achieve the above object, the present invention provides a method for automatically tracking a broadcast channel in a radio device that receives a broadcast signal transmitted from a radio station by adding broadcast station unique identification information representing its own broadcast station. Identifying a currently selected broadcast channel through identification information; searching for whether a broadcast signal of the checked broadcast channel is received in another frequency band when the reception strength of the broadcast signal is out of a predetermined stable value; When the broadcast signal of the identified broadcast channel is received in another frequency band, the tuner may tune to the corresponding frequency.

1 is a schematic overall configuration diagram of a radio system for automatically tracking a channel of a radio broadcast according to an embodiment of the present invention;

FIG. 2 is a block diagram of the entire radio device of FIG.

3 is a flowchart illustrating a process of automatically tracking a channel of a radio broadcast of the controller of FIG. 2.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific matters such as specific processes are shown, which are provided to help a more general understanding of the present invention, and the specific matters may be modified or changed within the scope of the present invention. It is self-evident to those of ordinary knowledge in Esau.

1 is a schematic overall configuration diagram of a radio system for automatically tracking a channel of a radio broadcast according to an embodiment of the present invention. Referring to FIG. 1, in the present invention, when each radio station 10 transmits a broadcast signal to a radio device 20 of a vehicle, the station specific identification information (ID) indicating its own station is added to the corresponding program. The broadcasting station unique identification information is for identifying each broadcasting station, and the broadcasting station transmits identification information unique to each broadcasting station together with the voice signal. Such a station unique address is used even if the frequency of the local broadcast is different. For example, even if the broadcasting channel frequency of the metropolitan area of Broadcasting Station A is 89 MHz and the broadcasting channel frequency of the Yeongnam region is 108 MHz, the broadcasting station unique identification information is used the same. The radio apparatus 20 performs the broadcast channel automatic tracking operation according to the feature of the present invention by using the unique station identification information.

FIG. 2 is a block diagram of the entire radio device of FIG. 1. Referring to FIG. 2, the radio apparatus according to the present invention includes a tuner 21, a signal separator 22, an amplifier 23, a speaker 24, a received field strength detector 25, a decoder 6, an operator 27, and a controller 28. The tuner 20 performs a tuning operation in response to the tuning signal provided from the control unit 28, and receives and demodulates a signal having a corresponding frequency. The signal separator 22 separates and outputs the unique identification information and the audio signal of the corresponding broadcasting station from the signal output from the tuner 20. The amplifier 23 amplifies the voice signal output from the signal separator 22 under the control of the controller 28 and outputs the audible sound through the speaker 24.

The decoder 26 decodes broadcasting station unique identification information output from the signal separator 22 and outputs the decoded information to the controller 28. The operation unit 27 includes a plurality of keys for selecting a broadcast channel, adjusting a volume, and the like, and outputs a key input signal according to the driver's key input to the controller 28 to interface the driver with the radio device. The receiving field strength detector 25 measures the electric field strength of the received broadcast signal and outputs it to the controller 28.

The control unit 28 outputs the tuning signal to the tuner 21 according to the channel selection signal according to the operation of the driver's control unit 27, analyzes the output signal of the decoder 23, recognizes the corresponding broadcasting station, and receives the received broadcast signal through the reception field strength detection unit 25. The electric field is identified and the channel auto tracking operation according to the characteristics of the present invention is controlled. Hereinafter, the operation of the controller 28 will be described in more detail with reference to FIG. 3.

3 is a flowchart illustrating a process for automatically tracking a channel of a radio broadcast of the controller of FIG. 2. First, when the driver initially operates the radio device or performs a channel selection operation, the controller 28 outputs a tuning signal according to the channel selection signal to the tuner 21 to start the operation. Thereafter, the control unit 28 is provided with unique broadcasting station identification information of the broadcast signal received through the tuner 21 by the operation of the tuner 21, the signal separator 22, and the decoder 26.

The controller 28 identifies the broadcast channel currently selected in step 30 of FIG. 3 based on the received broadcast station unique identification information. Thereafter, in step 32, it is determined whether the electric field strength of the broadcast signal currently received by the reception electric field strength detection unit 25 is equal to or less than a preset stable value. That is, step 32 is a step for determining whether the vehicle moves to another broadcasting region. When the vehicle moves to another broadcasting region, the received electric field strength of the broadcasting signal received at the currently tuned frequency is weakened. Therefore, in step 32, if the current received electric field strength is out of a previously set stabilized value, the vehicle is considered to have moved to another broadcasting area, and then step 34 is performed.

In step 34, the controller 28 searches the entire frequency band. When searching for the entire frequency band, if the broadcast signal of the currently selected broadcast channel identified in step 30 is received in another frequency band, it is checked in step 36 and then proceeds to step 38, and the broadcast signal of the currently selected broadcast channel is in a different frequency band. If it is not received from the process returns to step 32 to repeat the above process.

In step 38, in step 36, the broadcast signal of the broadcast channel currently selected in another frequency band is tuned to a corresponding frequency.

Through the above process, the broadcast channel automatic tracking process according to the features of the present invention may be performed.

Meanwhile, 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 by the equivalents of the claims and claims.

As described above, the present invention provides a method for automatically tracking a broadcast channel in a radio device that receives a broadcast signal transmitted from a radio station by adding broadcast station unique identification information indicating its own broadcast station. Checking the currently selected broadcast channel, searching for whether a broadcast signal of the checked broadcast channel is received in another frequency band when the reception strength of the broadcast signal is out of a preset stable value, and searching for another frequency band in the search When the broadcast signal of the checked broadcast channel is received, the process has a process of tuning to a corresponding frequency, thereby automatically tracking a specific broadcast having a different broadcast frequency for each predetermined region and always tuning to the same broadcast frequency.

Claims (1)

A method for automatically tracking a broadcast channel in a radio device that receives broadcast signals transmitted from a radio station by adding broadcast station unique identification information representing its own broadcast station, the method comprising: Identifying a currently selected broadcast channel through the broadcast station unique identification information; Searching whether a broadcast signal of the checked broadcast channel is received in a different frequency band when the reception strength of the broadcast signal is out of a predetermined stable value; And when the broadcast signal of the identified broadcast channel is received in another frequency band during the search, tuning to the corresponding frequency.