KR101551033B1

KR101551033B1 - A switching method of the digital-to-analog broadcasting and an switching apparatus thereof

Info

Publication number: KR101551033B1
Application number: KR1020130165250A
Authority: KR
Inventors: 이진우
Original assignee: 현대자동차주식회사
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2015-09-07
Also published as: KR20150076721A; DE102014213242A1

Abstract

The present invention relates to a method of switching a digital analog broadcast, and more particularly, to a method of switching a digital analog broadcast, which includes receiving a digital broadcast, measuring a strength of a digital broadcast signal, A step of receiving a signal of an analog broadcasting, a step of storing a signal of an analog broadcasting in a buffer, a step of adding a signal of an analog broadcasting stored in a buffer to a signal of a digital broadcasting, Step is included.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a digital analog broadcasting,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a switching method and a switching apparatus for digital analog broadcasting, and more particularly, to a broadcasting switching method and a switching apparatus that are switched naturally without interruption in a process of switching from digital audio broadcasting broadcasting to F- .

Digital audio broadcating (DAB) is an audio broadcasting capable of transmitting high-quality, character graphic moving pictures at the same level as a compact disc using terrestrial waves.

In the case of a digital audio broadcasting system applied to a vehicle, when the signal of the currently received broadcast signal is not good, it is replaced with the same broadcast signal of another channel or converted to an FM (Frquency Modulation) radio broadcast do.

However, in the case of the conventional digital audio broadcasting, there is a problem that the broadcasting is interrupted due to the time delay when switching from digital audio broadcasting broadcasting to EFM broadcasting.

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a digital audio broadcasting broadcasting system in which, in a process of switching from a digital audio broadcasting broadcasting to an Efam broadcasting, And to provide a switching method and a switching device of digital analog broadcasting in which a break phenomenon does not occur in the process of switching from digital broadcasting to analog broadcasting.

According to an aspect of the present invention, there is provided a digital broadcasting receiver, Measuring a strength of the digital broadcasting signal; Receiving a signal of an analog broadcast if the intensity of the digital broadcast signal is lower than a preset first reference value; Storing a signal of the analog broadcast in a buffer; And adding a signal of the analog broadcast stored in the buffer to the signal of the digital broadcasting and transmitting the analog broadcasting signal to a speaker.

When the intensity of the digital broadcasting signal is lower than a preset second reference value after the analog broadcast signal stored in the buffer is added to the digital broadcasting signal and is transmitted to the speaker, And replacing the analog broadcasting signal with a signal of the analog broadcasting.

Also, the digital broadcasting is digital audio broadcasting (DAB) broadcasting, and the analog broadcasting is FM (Frequency Modulation) broadcasting.

According to another aspect of the present invention, there is provided a signal strength measuring apparatus comprising: a signal strength measuring unit measuring a strength of a digital broadcasting or analog broadcasting signal; A buffer serving as a temporary storage space; If the strength of the signal of the digital broadcasting measured by the signal strength measuring unit is lower than a predetermined first reference value, storing the analog broadcasting signal in the buffer, adding the analog broadcasting signal to the digital broadcasting signal, And a controller for controlling the switching of the digital broadcasting apparatus.

Wherein the control unit replaces a signal transmitted to the speaker by the analog broadcasting if the intensity of the digital broadcasting signal measured by the signal strength measuring unit is lower than a preset second reference value, Thereby providing a switching device.

Also, the digital broadcasting is a digital audio broadcasting broadcasting, and the analog broadcasting is an EFAM broadcasting.

As described above, the switching method and switching device of the digital analog broadcasting according to the present invention can prevent the sound from being cut off when switching from digital broadcasting to analog broadcasting.

In addition, even when a signal loss phenomenon occurs due to passage of a tunnel or the like during listening to a digital broadcast, it is possible to maintain continuous broadcasting without stopping the sound.

FIG. 1 is a block diagram showing a configuration of a general digital audio broadcasting system.
FIG. 2 is a diagram showing a flow of signals of digital broadcasting and analog broadcasting in the conventional digital audio broadcasting system.
FIG. 3 is a diagram illustrating an internal configuration of a digital-analog broadcasting switching apparatus according to a preferred embodiment of the present invention.
FIG. 4 is a diagram showing a comparison between a digital analog broadcasting switching method and a conventional digital analog broadcasting switching method according to a preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

FIG. 1 is a block diagram showing a configuration of a general digital audio broadcasting system.

A typical digital audio broadcasting system may include a digital audio broadcasting module 100, a host 200, a speaker 300, a digital audio broadcasting antenna 140, and an FMP antenna 210.

The digital audio broadcasting module 100 may include RF-baseband (BB) modules 110 and 120 and a digital audio broadcasting reception chip 130 .

The digital audio broadcasting module 100 and the host 200 may perform Universal Asynchronous Receiver Transmitter (UART) communication and SPI (Serial Peripheral Interface) data communication. Then, an audio signal, an IIS signal, may be sent to the host 200 to drive the speaker 300.

FIG. 2 is a diagram showing a flow of signals of digital broadcasting and analog broadcasting in the conventional digital audio broadcasting system.

The digital signal received through the digital audio broadcasting antenna 140 passes through the digital audio broadcasting reception chip 130 along the arrow A in the drawing and is transmitted to the speaker 300 directly through the host 200 .

The analog signal is received through the Fem antenna 210 and then directly output through the host 200 via the speaker 300.

That is, since the transmission paths of the digital signal and the analog signal are binary, the digital broadcasting is not naturally switched in the process of replacing with the analog broadcasting, but a break occurs.

FIG. 3 is a diagram illustrating an internal configuration of a digital-analog broadcasting switching apparatus according to a preferred embodiment of the present invention.

The apparatus for switching digital-analog broadcasting according to the preferred embodiment of the present invention may further include a buffer 131 in the de-embedding chip 130. [

The buffer 131 can temporarily store the Femm broadcast signal received through the FemA antenna 210 through the 'C' path.

Therefore, when the digital broadcast signal received through the digital audio broadcasting antenna 140 is transmitted through the 'D' path and the digital broadcast signal becomes weak and needs to be replaced with an analog signal, It is possible to naturally substitute an analog signal while transmitting the analog signal to the digital signal.

Therefore, the user who receives the digital broadcasting in the vehicle can continuously listen to the broadcasting even if the digital broadcasting is switched to the analog broadcasting while the vehicle is moving.

This process will be described again as follows.

When the digital broadcast signal is normally received, the digital broadcast signal reproduces the broadcast through the speaker 300 through the 'C' path.

However, if the value of the digital broadcasting signal is lower than a predetermined first reference value due to vehicle movement or the like, the method of switching digital analog broadcasting according to the preferred embodiment of the present invention may include: 131 to add it to the digital broadcast signal and send it again.

When the digital broadcasting signal becomes lower in intensity and becomes lower than the second reference value, the method of switching the digital analog broadcasting according to the preferred embodiment of the present invention completely replaces the digital broadcasting signal with the analog broadcasting signal.

Therefore, at the time of switching between digital broadcasting and analog broadcasting, broadcasting can be naturally switched without a break phenomenon.

FIG. 4 is a diagram showing a comparison between a digital analog broadcasting switching method and a conventional digital analog broadcasting switching method according to a preferred embodiment of the present invention.

Conventionally, in order to switch from digital broadcasting to analog broadcasting, two paths are binary, and there is no process of storing analog broadcasting in the middle, so that there is a signal interruption of about 2 seconds.

However, in the method of switching the digital analog broadcasting according to the preferred embodiment of the present invention, the analog broadcasting is temporarily stored in the buffer and is output in addition to the digital broadcasting, thereby preventing the signal from being interrupted in the middle.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. And changes may be made without departing from the spirit and scope of the invention.

100: Digital Audio Broadcasting Module
110, 120: RF-baseband module
130: Digital Audio Broadcasting Receive Chip
131: buffer
140: Digital Audio Broadcasting Antenna
200: Host
210: Ff antenna
300: Speaker

Claims

Receiving digital broadcasting;
Measuring a strength of the digital broadcasting signal;
When a measured signal intensity of the digital broadcast signal is lower than a preset first reference value, a signal of an analog broadcast signal is stored in a buffer located in a digital audio broadcasting receiving chip;
Adding a signal of the analog broadcasting stored in the buffer to the digital broadcasting signal and transmitting the analog broadcasting signal to a speaker;
A signal transmitted to the loudspeaker when the strength of the signal of the digital broadcasting is lower than a preset second reference value after the signal of the analog broadcasting stored in the buffer is added to the signal of the digital broadcasting and the signal is transmitted to the speaker Replacing the signal with the analog broadcasting signal;
And converting the digital broadcast signal into a digital broadcast signal.

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The method according to claim 1,
The digital broadcasting is digital audio broadcasting (DAB) broadcasting,
Wherein the analog broadcasting is FM (Frequency Modulation) broadcasting.

A signal strength measuring unit for measuring a strength of a digital broadcasting signal or an analog broadcasting signal;
A buffer located in a digital audio broadcasting receiving chip to serve as a temporary storage space for an analog broadcast signal;
If the intensity of the digital broadcast signal measured by the signal strength measuring unit is lower than a predetermined first reference value, the analog broadcast signal is stored in the buffer, and the analog broadcast signal stored in the buffer is added to the digital broadcast signal, A controller for replacing a signal transmitted to the speaker with an analog broadcast if the intensity of the digital broadcast signal measured by the signal strength measuring unit is lower than a preset second reference value;
Wherein the switching unit is configured to switch between the digital broadcasting mode and the analog broadcasting mode.

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5. The method of claim 4,
The digital broadcast is a digital audio broadcasting broadcast,
Wherein the analog broadcast is an FFF broadcast.