KR20150061808A - Method for channel auto switching of radio broadcasting - Google Patents

Abstract

According to the present invention, disclosed is an automatic switching method for a radio broadcasting channel. The automatic switching method for a radio broadcasting channel of the present invention comprises steps of: allowing a control unit to sense a broadcast signal of the corresponding channel, when a digital radio broadcasting channel is inputted from a channel selection unit; searching for a digital radio broadcasting channel in a channel DB, if the broadcast signal of the corresponding channel is not sensed, as a result of the sensing; and performing a digital radio broadcasting service by determining whether the broadcast signal is sensed or not according to the search result.

Description

{METHOD FOR CHANNEL AUTO SWITCHING OF RADIO BROADCASTING}

The present invention relates to a radio broadcast channel automatic switching method, and more particularly, to a radio broadcast channel automatic switching method in which when a broadcast signal is not detected due to a movement of a region while listening to a digital radio broadcast channel, Searching for an analog radio broadcast channel, and automatically switching the radio broadcast channel.

Conventionally, a wide variety of information has been provided to a large number of people through analog radio broadcasting in the world. However, since the quality of the received signal is rapidly deteriorated when moving, the power efficiency is reduced by using high transmission power to reduce the influence of noise, There are technological limitations such that the spectrum efficiency is lowered by using different frequencies in the vicinity region in order to avoid it.

Therefore, AM / FM broadcasting band is providing new digital broadcasting technology in FM / AM frequency band and OUTBAND for better sound quality and data service.

Discussions on the introduction of digital radio in Korea began in 1997, and in 2001, the European radio DAB (Eureka-147) was selected as the digital radio system for FM radio. However, in 2003, DAB decided to use it for mobile TV service, so it was not a radio broadcasting service but a TV broadcasting service.

This was DMB, and in December 2005, commercial service was launched for the first time in the world. After the commercialization of DMB, the discussion of digital conversion of radio has resumed and technical analysis of digital radio has been continued.

Currently, the domestic standard for digital radio broadcasting is not defined, but DRM and DAB +, which have the IBOC method that utilizes the existing frequency, are becoming the plural standards.

Therefore, digital broadcasts as well as analog broadcasts such as DAB / DRM / FM also exist simultaneously.

At this time, the same broadcasting service is provided not only in analog but also in digital broadcasting. In digital broadcasting, a broadcasting service is selected from among a plurality of mobiles in the case of a vehicle, while a plurality of broadcasting services are provided in a SUB service in various frequencies. It is necessary to develop an algorithm that enables the same service of different frequencies.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2011-0100781 (published on Mar. 15, 2011, entitled "Vehicle Radio Broadcast Receiver and Automatic Frequency Switching Method").

Generally, in the case of digital radio broadcasting, the same broadcast is transmitted over a plurality of frequencies. At this time, since the same broadcast ID has the same service ID, if the region is moved or the reception state is poor, another channel of the same broadcast is searched and provided to provide a better service quality to the user.

In this case, since the digital radio broadcast is switched to the analog radio broadcast in the normal case, the broadcast quality is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a digital radio broadcasting system, The present invention provides a method of automatically switching a radio broadcast channel to search for an analog radio broadcast channel after first searching in the channel, and automatically switching the service.

Another object of the present invention is to provide a digital radio broadcasting service capable of searching for a broadcast signal of the same broadcast by using hard link information without switching to analog radio broadcasting if a broadcast signal of the selected digital radio broadcast channel is not detected, And to provide a method for automatically switching radio broadcasting channels.

A method of automatically switching a radio broadcast channel according to the present invention includes the steps of: when a control unit receives a digital radio broadcast channel from a channel selection unit, detecting a broadcast signal of the channel; If the broadcast signal of the corresponding channel is not detected as a result of the detection, searching for the digital radio broadcast channel in the channel DB; And determining whether the broadcast signal is sensed according to the search result and providing digital radio broadcast service.

In the present invention, the step of searching for the digital radio broadcasting channel may search the channel DB to find whether the same ensemble ID or service ID exists as the broadcasting signal.

In the present invention, the step of searching for the digital radio broadcasting channel may search for the channel DB and search for the existence of the same hard link information as the broadcast signal.

According to another aspect of the present invention, there is provided a method of searching for an analog radio broadcasting channel, And further comprising:

A method of automatically switching a radio broadcast channel according to the present invention is a method for automatically switching a radio broadcast channel when a region is moved while listening to a digital radio broadcast channel or a broadcast signal is not detected due to a bad reception state, It is possible to provide seamless digital radio broadcasting regardless of the moving region of the vehicle by searching for and automatically switching the broadcasting channel.

In addition, according to the present invention, if a broadcast signal of a selected digital radio broadcast channel is not detected, the broadcast signal of the same broadcast is searched using the hard link information, without switching to analog radio broadcast, The broadcast quality can be improved.

1 is a block diagram illustrating an apparatus for automatically switching a radio broadcast channel according to an embodiment of the present invention.
2 is a flowchart illustrating an operation flow of a radio broadcast channel automatic switching method according to an embodiment of the present invention.

Hereinafter, a method for automatically switching a radio broadcast channel according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

Further, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a block diagram illustrating an apparatus for automatically switching a radio broadcast channel according to an embodiment of the present invention.

1, an apparatus for automatically switching a radio broadcast channel according to an exemplary embodiment of the present invention includes an analog radio broadcast receiving unit 10, an analog broadcast audio processing unit 20, a digital radio broadcast receiving unit 30, a digital broadcast audio processing unit 40, a channel selection unit 50, a channel DB 60, a control unit 70, an audio selection unit 80, an AMP 90, and a speaker 100.

The analog radio broadcast receiving unit 10 includes a plurality of FM tuners 11 and an AM tuner 12 for selectively tuning and tuning only a specific frequency signal among the radio signals received via the antenna 13. [

The analog broadcast audio processing unit 20 receives the specific frequency signal tuned from the analog radio broadcast receiving unit 10, demodulates and decodes the specific frequency signal, and extracts it as an analog radio broadcast signal.

The digital radio broadcast receiving unit 30 includes a plurality of DAB tuners 31 and a DRB tuner 32 for selectively tuning and tuning only a specific frequency signal among the radio signals received through the antenna 33. [

The digital broadcast audio processing unit 40 receives the specific frequency signal tuned from the digital radio broadcast receiving unit 30, demodulates and decodes the specific frequency signal, and extracts it as a digital radio broadcast signal.

The channel selection unit 50 transmits the selected radio broadcast channel to the controller 70 when the user selects the radio broadcast channel.

The channel DB 60 stores service ID, ensemble ID, hard link information, and channel list information of the digital / analog radio broadcast channel.

At this time, the service ID may be defined as being physically the same channel or logically providing a different channel, and the ensemble ID may be defined as a collection of these service IDs.

In addition, the hard link information can be defined to provide two services simultaneously in one ensemble ID even if the service ID is different.

When a digital radio broadcast channel is inputted from the channel selector 50, the controller 70 detects a broadcast signal of the corresponding channel and provides a digital radio broadcast service when a broadcast signal of the corresponding channel is detected.

If the broadcast signal of the corresponding channel is not detected, the channel DB 60 is searched to determine whether the same ensemble ID or service ID as the broadcast signal of the digital radio broadcast channel input from the channel selection unit 50 exists If it exists, it judges whether or not the broadcast signal is received, and services digital radio broadcasting.

At this time, if there are several ensemble IDs or service IDs, it is determined whether or not the broadcast signals are received for both the ensemble IDs and the service IDs, and repeated search is performed until the same ensemble IDs and service IDs exist.

However, if the same ensemble ID or service ID does not exist, the channel DB 60 is re-searched to determine whether or not the same hard link information as the broadcast signal of the digital radio broadcast channel input from the channel selection unit 50 exists And judges whether or not there is a digital radio broadcasting service according to whether the broadcasting signal is received.

At this time, it is repeatedly searched for the number of hard link information to determine whether the same hard link information exists, and if not, the analog radio broadcast channel is searched.

That is, the control unit 70 searches the channel DB 60 and detects the same broadcasting signal as the broadcasting signal of the digital radio broadcasting channel input from the channel selection unit 50. When the same broadcasting signal exists, S / F) to service digital radio broadcasting.

When the controller 70 detects an analog radio broadcasting channel, the controller 70 determines whether or not the same broadcasting signal is detected. If the same is detected, the controller 70 determines whether the broadcasting signal is received and performs AF with an FM-RDS (Radio Data System) It serves radio broadcasts.

At this time, the RDS adds simple data to the FM broadcast by adding an additional data signal. The RDS transmits the FM broadcast signal at a frequency of about 1.1 kbps at 57 kHz, the frequency of the current broadcast genre, a similar genre, It is a function that shows related information together with text.

In addition, the AF (Alternative Frequency), for example, when a specific broadcast is received from a vehicle in Seoul and then goes down to the local area, the broadcast frequency is changed and the broadcast is not captured. At this time, when the AF function is operated, It is a function that allows you to listen to the broadcast while listening to it without interruption.

When the digital / analog radio broadcast is selected by the control unit 70, the audio selection unit 80 outputs the broadcast as analog audio.

The AMP 90 outputs the analog audio output from the audio selection unit 80 through the speaker 100. [

As described above, according to an embodiment of the present invention, when a radio broadcasting channel is automatically switched and a region is moved while listening to a digital radio broadcasting channel, or when a broadcasting signal is not detected due to a poor reception state, After searching for a channel first, it searches for analog radio broadcasting channel and automatically switches and services it, so that seamless digital radio broadcasting service can be provided regardless of the moving region of the vehicle.

In addition, if the broadcast signal of the selected digital radio broadcast channel is not detected, the broadcast signal of the same broadcast is searched using the hard link information instead of directly switching to the analog radio broadcast, Can be improved.

FIG. 2 is a flowchart illustrating an operation flow of a radio broadcast channel automatic switching method according to an embodiment of the present invention, and a specific operation of the present invention will be described with reference to FIG.

When the control unit 70 receives a digital radio broadcast channel from the channel selection unit 50 (S10), it detects a broadcast signal of the corresponding channel (S20).

As a result of the detection in step S20, if a broadcast signal of the corresponding channel is detected, digital radio broadcasting of the corresponding channel is serviced (step S21).

However, if the broadcast signal of the corresponding channel is not detected, the channel DB 60 is searched to determine whether a broadcast signal identical to the broadcast signal of the digital radio broadcast channel input from the channel selection unit 50 is sensed (S30, S40) .

More specifically, the channel DB 60 is searched to determine whether or not the same ensemble ID or service ID as the broadcast signal of the digital radio broadcast channel input from the channel selection unit 50 exists, and if there is a broadcast signal, And services the digital radio broadcasting (S21).

At this time, if there are several ensemble IDs or service IDs, it is determined whether or not the broadcast signals are received for both the ensemble IDs and the service IDs, and repeated search is performed until the same ensemble IDs and service IDs exist.

If the same ensemble ID or service ID does not exist, the channel DB 60 is re-searched to determine whether hard link information identical to the broadcast signal of the digital radio broadcast channel input from the channel selection unit 50 exists And judges whether or not there is a digital radio broadcasting service according to whether the broadcasting signal is received.

At this time, it is repeatedly searched for the number of hard link information to determine whether the same hard link information exists. If not, the analog radio broadcast channel is searched (S50).

That is, the control unit 70 searches the channel DB 60 and detects the same broadcasting signal as the broadcasting signal of the digital radio broadcasting channel input from the channel selection unit 50. When the same broadcasting signal exists, S / F) to service digital radio broadcasting.

In step S60, the control unit 70 determines whether the same broadcast signal is detected when searching for an analog radio broadcast channel. If the same broadcast signal is detected in step S60, the control unit 70 performs AF on the FM-RDS (Radio Data System) (S70).

If the same broadcast signal is not detected, it is determined that there is no broadcast signal and the broadcast service is not performed (S61).

As described above, according to an embodiment of the present invention, a method for automatically switching a radio broadcasting channel includes moving a region while listening to a digital radio broadcasting channel, or if a broadcasting signal is not detected due to a poor reception state, After searching for a channel first, it searches for analog radio broadcasting channel and automatically switches and services it, so that seamless digital radio broadcasting service can be provided regardless of the moving region of the vehicle.

In addition, if the broadcast signal of the selected digital radio broadcast channel is not detected, the broadcast signal of the same broadcast is searched using the hard link information instead of directly switching to the analog radio broadcast, Can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. will be. Accordingly, the true scope of the present invention should be determined by the following claims.

10: analog radio broadcast receiving unit 20: analog broadcast audio processing unit
30: digital radio broadcast receiving unit 40: digital broadcast audio processing unit
50: channel selection unit 60: channel DB
70: control unit 80: audio selection unit
90: AMP 100: Speaker

Claims (4)

When the control unit receives a digital radio broadcast channel from the channel selection unit, sensing a broadcast signal of the channel;
If the broadcast signal of the corresponding channel is not detected as a result of the detection, searching for the digital radio broadcast channel in the channel DB; And
Determining whether a broadcast signal is detected according to the search result, and providing a digital radio broadcast service.
The method of claim 1, wherein the step of searching for the digital radio broadcast channel comprises:
Searching for the channel DB, and searching whether the same ensemble ID or service ID exists as the broadcast signal.
The method of claim 1, wherein the step of searching for the digital radio broadcast channel comprises:
Searching for the channel DB and searching for the existence of the same hard link information as the broadcast signal.
The method according to claim 1,
If the digital radio broadcast channel is not searched, searching for an analog radio broadcast channel and providing an analog radio broadcast service; Further comprising the steps of:

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