KR20030090826A - Data transmitting/receiving apparatus of digital radio, and data control system thereof and data control method thereof - Google Patents

Abstract

PURPOSE: An apparatus for transmitting and receiving data in a digital radio, a data control system thereof, and a data control method thereof are provided to control various devices which work for the profitability of public or private companies by digital data transmitted through a digital broadcasting. CONSTITUTION: An OFDM(Orthogonal Frequency Division Multiplexing) modulator(110) uses input channels having an acoustic broadcasting channel(C1), a public control service channel(C2) and a profit company service channel(C3), and modulates acoustic broadcasting data, public control data and public company data to be suitable for a digital broadcasting. An up-converter(120) broadcasts the data modulated in the OFDM modulator(110) through a dynamic frequency conversion operation.

Description

DATA TRANSMITTING / RECEIVING APPARATUS OF DIGITAL RADIO, AND DATA CONTROL SYSTEM THEREOF AND DATA CONTROL METHOD THEREOF}

The present invention relates to a data transmission / reception device of a digital radio, a data control system thereof, and a data control method thereof. More particularly, the present invention relates to digital data that uses additional data other than sound broadcast data to control a specific controller for public or profitable business purposes. A data transmitting / receiving apparatus for a radio, a data control system thereof, and a data control method.

Since analog radio only broadcasts in sound, data transmission is difficult. However, as digital radio has been recently developed and introduced into broadcasting, complex data transmission has been realized from simple information transmission.

For example, a digital radio may transmit data such as lyrics, composer, singer, or even a singer's photo or music video while transmitting music.

Unlike conventional analog radios, such digital radios are easy to expand a large number of channels and provide additional data to perform various services. In the future, the satellite radio, digital radio is expected to increase the number of broadcast channels that the user can select.

Although digital radio can transmit a lot of information to users, digital broadcasting using digital radio has not been widely commercialized until now.

Therefore, the conventional method using a beeper or other wireless communication equipment for remote control is expensive to maintain and has a problem in controlling a large number of devices.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to transmit / receive data of a digital radio which can control various devices for promoting profitability of public or private companies by using digital data transmitted through digital broadcasting. The present invention provides a receiving device, a data control system thereof, and a data control method.

Fig. 1 shows the configuration of a transmitting apparatus in a data control system of a digital radio of an embodiment according to the present invention.

2 is a block diagram of a receiving apparatus in a data control system of a digital radio according to an embodiment of the present invention.

3 is a flowchart of a data control method of a digital radio of an embodiment according to the present invention.

A feature of the data transmission apparatus of the digital radio according to the present invention for realizing the above object is that the digital channel is mixed with an input channel having a plurality of service channels such as sound broadcast data, public control data, and revenue business data. Modulation means suitable for broadcasting; And converting means for broadcasting the mixed and modulated data through the modulating means through a dynamic frequency conversion operation.

In this case, the modulation means uses an OFDM modulator that modulates a plurality of data input through the input channel into a plurality of digital modulation waves to enable multi-path and modulates them into a transmission signal of orthogonal frequency division multiplexing (OFDM). The converting means uses an up-converter.

On the other hand, a feature of the data receiving apparatus of the digital radio according to the present invention, the baseband unit for receiving the intermediate frequency signal of the transmission signal broadcast by radio waves and performing signal conversion to calculate the valid data; A decoder which classifies valid data transmitted through the baseband unit into audio data and data for data transmission using channel information; A user interface for outputting channel information corresponding to data classified through the decoder to the outside; And a microcomputer that receives data for data transmission from the data classified through the decoder, determines the validity of the data for data transmission, and then performs control of the controller.

It is preferable that a radio frequency (RF) unit for receiving a transmission signal and outputting an intermediate frequency signal is disposed in front of the baseband unit.

The decoder includes an audio decoder for extracting sound broadcast data from the valid data of the baseband unit; And an information transmission decoder for extracting X-PAD data provided for information transmission from the valid data.

The microcomputer verifies whether the control ID (ID) in the information transmission data matches the ID of the controller and verifies the validity of the data.

A feature of the data control system of a digital radio according to the present invention is a transmission device that broadcasts a transmission signal to which an input channel used for digital radio broadcasting, in addition to sound broadcasting data, is added a service channel such as public control data and revenue business data. ; And a receiving device which receives a transmission signal broadcast from the transmitting device, classifies a channel, checks the validity of the classified channel information, and controls a controller to control according to a control signal in the channel information.

The transmitting device,

Modulating means for mixing a plurality of service channels and modulating the digital broadcasting to be suitable for digital broadcasting; And conversion means for broadcasting mixed and modulated data through the modulation means through a dynamic frequency conversion operation.

The receiving device,

A radio frequency (RF) unit for receiving the transmission signal and outputting the intermediate frequency signal; A baseband unit configured to receive the intermediate frequency signal of the radio frequency unit and perform signal conversion to calculate valid data; A decoder which classifies valid data transmitted through the baseband unit into sound broadcast data and data for data transmission using channel information; A user interface for outputting channel information corresponding to data classified through the decoder to the outside; And a microcomputer that receives data for data transmission from the data classified through the decoder, determines the validity of the data for data transmission, and then performs control of the controller.

The decoder includes an audio decoder for extracting sound broadcast data from the valid data of the baseband unit; And an information transmission decoder for extracting X-PAD data provided for information transmission from the valid data.

A feature of the data control method of a digital radio according to the present invention includes the steps of: a) receiving a transmission signal of a digital radio broadcast by radio waves and determining whether the transmission signal includes data for transmitting information for controlling a specific controller; b) determining whether to remove the acoustic broadcast data by determining whether the acoustic broadcast data is used in the transmission signal when the data for data transmission is included in the step a); And c) when step b) is completed, checking only validity by extracting data for information transmission from the transmission signal and controlling the controller.

The step of checking the validity of the information transmission data in step c) confirms whether the control ID and the ID of the controller in the information transmission data match.

In the controlling of the controller in the step c), the control target data value of the information transmission data is compared with the state of the current controller to determine whether the control operation is terminated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows the configuration of a transmitting apparatus in a data control system of a digital radio of an embodiment according to the present invention.

As shown in FIG. 1, the transmission apparatus of the embodiment according to the present invention propagates a modulated transmission signal through an orthogonal frequency division multiplexing (OFDM) modulator 110 and an OFDM modulator 110 that use a plurality of input channels. Up-Converter 120 to be broadcasted to.

Unlike conventional analog radios, digital radios are easy to expand to a large number of channels and provide additional data to perform various services.

Therefore, the input channel is a public broadcast service channel C1 for sound broadcast data of a broadcasting station, a public control service channel C2 for controlling a controller 200 having a public purpose such as a government or a municipality, a product of a private enterprise. Various channels may be configured in addition to the service channel C3 for profitable business for performing an advertisement or a notification function at a certain time.

The OFDM modulator 110 is a type of multicarrier modulation. Since the OFDM modulator 110 has excellent performance in a multipath and mobile reception environment, the OFDM modulator 110 is suitable for terrestrial digital TV and digital voice broadcasting.

The up-converter 120 implements LNA, BPF, Mixer, PLL, and IF Amp as a module according to the requirements of the wireless communication equipment manufacturer, and is designed for dynamic frequency conversion.

2 is a block diagram of a receiving apparatus in a data control system of a digital radio according to an embodiment of the present invention.

As shown in FIG. 2, the reception device according to the embodiment of the present invention includes an RF unit 210 that receives a digital radio broadcast transmission signal and outputs the intermediate frequency signal, and receives an intermediate frequency signal to perform signal conversion. A baseband unit 220 that calculates an audio decoder 230, extracts sound broadcast data from valid data, a PAD decoder 240 extracts X-PAD data provided for information transmission from the valid data, and decoders 230 The user interface unit 250 outputs the channel information corresponding to the classified data through the external terminal 240, and receives the data for data transmission from the classified data through the decoder to determine the validity before controlling the controller. It includes a microcomputer 260 to perform.

In this case, the X-PAD data is accompanied by the sound broadcast data, that is, the audio data, and the PAD data basically provides information related to the audio, but in the embodiment of the present invention, the PAD data is independent of the audio data. It transmits one control signal and has various sizes depending on the length of the information.

Here, the PAD data is a packet for transmitting audio-related or unrelated data from a broadcasting station to provide an additional function to a receiver. PAD data includes X-PAD and F-PAD data. F-PAD data consists of only two bytes and has a very low bit rate (0.667 Kbits / s). This F-PAD data is for transmitting strong real-time information such as warning, and the X-PAD data is a packet whose length is variable according to the information provider and can add various data.

In general, the receiving device of the digital radio has a frame length of 96 ms in the case of mode 1, 24 ms in the mode 2 and mode 3, and 48 ms in the mode 4 mode.

Therefore, in the case of Mode 1, X-PAD data is determined with user information after storing audio data and X-PAD data having a length corresponding to the previous 96ms.

In the above, each mode is used because only the frame length is changed in consideration of the characteristics of the channel environment according to the frequency, and thus the same meaning is used.

In mode 1, 12 fast information channel (FIC) data are embedded within 96ms, and 8 subchannels are configured. FIC data is a fast information channel, which is audio data which is main information and information transmitted in a packet ahead of a main service channel (MSC), and is a packet including various information for analyzing the MSC.

In this case, six subchannels among the eight subchannels are acoustic broadcast channels, and two subchannels are data transmission channels.

In an embodiment according to the present invention, PAD data transmitted by being attached to six acoustic broadcast channels is used, and the acoustic broadcast channel includes audio data and X-PAD and F-PAD data.

As mentioned above, the F-PAD data is control information, and the X-PAD data is extended PAD data provided for information transmission. Unlike the service channel of other data, X-PAD data is suitable as a control format by removing interleaving and lowering the data rate in order to prevent data corruption, and according to an embodiment of the present invention, the X-PAD data is used as information transmission data. Use as.

Meanwhile, the microcomputer 260 analyzes the starting point of each service by analyzing the address information, the protection information, and the CU size of each service channel (C2, C3) by extracting the FIC data from the transmission signal for PAD data analysis. do.

When a specific service is selected, the microcomputer 260 decodes audio data corresponding to the service. The microcomputer 260 stores the X-PAD data following the audio data in a RAM.

The data control system of the digital radio of the embodiment according to the present invention includes the transmitting device of the digital radio and the receiving device thereof in the above-mentioned embodiment.

Looking at the data control operation of the digital radio of the embodiment according to the present invention configured as described above with reference to the accompanying drawings as follows.

3 is a flowchart of a data control method of a digital radio of an embodiment according to the present invention.

As shown in FIG. 3, the transmission apparatus of the embodiment according to the present invention puts X-PAD data for a public or profitable business to broadcast a transmission signal through radio waves.

That is, the OFDM modulator 110 combines the data of the acoustic broadcast channel C1, the public control service channel C2, and the profitable business service channel C3 into a plurality of digital modulated waves to enable multipath. Modulates to OFDM transmission signal. In addition, the up-converter 120 allows the transmission signal of the OFDM to be broadcast over the air through dynamic frequency conversion.

Then, in the receiving apparatus of the embodiment according to the present invention, the RF unit 210 inputs an OFDM transmission signal and outputs it as an intermediate frequency (IF) signal. (S1) The baseband unit 220 inputs an intermediate frequency signal. After performing the analog-to-digital conversion, the OFDM signal is demodulated, and valid data is calculated through processes such as interleaving and Viterbi decoding (S2).

The valid data passed through the baseband unit 220 extracts sound broadcast data through the audio decoder 230 using channel information, and the PAD decoder 240 extracts X-PAD data.

The user interface 250 outputs the channel information classified through the audio decoder 230 and the PAD decoder 240 to the outside.

On the other hand, the microcomputer 260 inputs the X-PAD data extracted by the PAD decoder 240 to determine the presence or absence of control information for controlling the specific controller 200 (S3).

When the microcomputer 260 confirms the existence of the control information, the microcomputer 260 determines whether to use the sound broadcast data in the controller 200 (S4), and when the sound broadcast data is used in the controller 200, the audio decoder 230. Acoustic broadcast data is output through S5.

However, when the controller 200 does not use the acoustic broadcast data, only the PAD information, that is, the X-PAD data is used, and thus the acoustic broadcast data is removed.

In this way, the sound broadcast data and the X-PAD data are classified through the decoders 230 and 240 to extract only necessary X-PAD data (S7), and the validity of the X-PAD data is determined (S8).

Here, the validity of the X-PAD data is determined by checking whether the control ID of the header portion of the X-PAD data and the ID of the controller 200 match.

The microcomputer 260 controls the controller 200 only when the control ID of the X-PAD data and the ID of the controller match. (S9)

At this time, the microcomputer 260 determines whether the control operation is terminated by determining whether the control target value reaches the control target value in comparison with the state of the current controller 200 in the control information in the X-PAD data. )

That is, the microcomputer 260 terminates the control operation when the state of the current controller 200 reaches the control target value. However, if the state of the controller 200 does not reach the control target value, the microcomputer 260 feeds back to the control operation and continues the control operation, and then the control operation is performed when the state of the controller 200 reaches the control target value. To exit.

As described above, embodiments according to the present invention can control a company device such as a toy or home appliance, or a control device of a general service such as a street lamp, a traffic light, a lighthouse for a public purpose, or a specific device by using a digital radio broadcast. Send advertisements, alerts, or other useful information.

It is apparent to those skilled in the art that the information mentioned in any one embodiment can be applied to other embodiments even if it is not specifically mentioned in the other embodiments.

The drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are not intended to limit the scope of the invention as defined in the claims or in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The apparatus for transmitting / receiving data of a digital radio according to the present invention, a data control system thereof, and a data control method thereof provide useful information in addition to an advertisement and notification function of a specific controller by adding a service channel for public control and a profitable business in addition to an audio broadcasting channel. There is an effect that can perform a variety of services, such as.

In addition, according to the present invention, a data transmission / reception apparatus of a digital radio, a data control system, and a data control method thereof provide a service channel for a profit business to a general company or a channel management organization by dividing a service channel for public control and a service channel for a profit business. It also allows multiple companies to share one channel to control, advertise and alert their products.

Claims (14)

Modulating means for mixing an input channel having a plurality of service channels, such as acoustic broadcast data, public control data, and profitable business data, to modulate the digital broadcast to be suitable; And Conversion means for broadcasting mixed and modulated data through the modulation means through a dynamic frequency conversion operation; Data transmission device of the digital radio comprising a. The method of claim 1, The modulation means uses a digital digital modulation (OFDM) modulator that modulates a plurality of data input through the input channel into a plurality of digital modulated waves to enable multipath and modulates them into transmission signals of orthogonal frequency division multiplexing (OFDM). Radio data transmission device. The method of claim 1, And said converting means is an up-converter. A baseband unit configured to receive an intermediate frequency signal of a transmission signal broadcast by radio waves and perform signal conversion to calculate valid data; A decoder which classifies valid data transmitted through the baseband unit into audio data and data for data transmission using channel information; A user interface for outputting channel information corresponding to data classified through the decoder to the outside; And The microcomputer that receives the information transmission data from the data classified through the decoder and determines the validity of the information transmission data and then performs the control of the controller. Data receiving device of a digital radio comprising a. The method of claim 4, wherein And a radio frequency (RF) unit configured to receive a transmission signal and output an intermediate frequency signal in front of the baseband unit. The method of claim 4, wherein The decoder, An audio decoder for extracting sound broadcast data from the valid data of the baseband unit; And And a data transmission decoder for extracting X-PAD data provided for information transmission from the valid data. The method of claim 4, wherein And the microcomputer verifies the validity of the data by determining whether a control ID (ID) in the information transmission data matches the ID of a controller. A transmission device that broadcasts a transmission signal to which an input channel used for digital radio broadcasting, in addition to sound broadcasting data, is added a service channel such as public control data and revenue business data; And Receiving apparatus for classifying a channel by receiving a transmission signal broadcast from the transmitting apparatus, checking the validity of the classified channel information and controlling the controller to control according to the control signal in the channel information Data control system of the digital radio comprising a. The method of claim 8, The transmitting device, Modulating means for mixing a plurality of service channels and modulating the digital broadcasting to be suitable for digital broadcasting; And Conversion means for broadcasting mixed and modulated data through the modulation means through a dynamic frequency conversion operation; Data control system of the digital radio comprising a. The method of claim 8, The receiving device, A radio frequency (RF) unit for receiving the transmission signal and outputting the intermediate frequency signal; A baseband unit configured to receive the intermediate frequency signal of the radio frequency unit and perform signal conversion to calculate valid data; A decoder which classifies valid data transmitted through the baseband unit into sound broadcast data and data for data transmission using channel information; A user interface for outputting channel information corresponding to data classified through the decoder to the outside; And The microcomputer that receives the information transmission data from the data classified through the decoder and determines the validity of the information transmission data and then performs the control of the controller. Data control system of the digital radio comprising a. The method of claim 10, The decoder, An audio decoder for extracting sound broadcast data from the valid data of the baseband unit; And And a data transmission decoder for extracting X-PAD data provided for information transmission from the valid data. a) receiving a transmission signal of a digital radio broadcasted by radio waves and determining whether the transmission signal includes information transmission data for controlling a specific controller; b) determining whether to remove the acoustic broadcast data by determining whether the acoustic broadcast data is used in the transmission signal when the data for data transmission is included in the step a); And c) when step b) is completed, extracting only information transmission data from the transmission signal to check validity and then controlling the controller device; Data control method of the digital radio comprising a. The method of claim 12, Checking the validity of the information transmission data in step c), And a control ID in the data for transmitting information and an ID of the controller. The method of claim 12, Controlling the controller in step c), And comparing the control target data value of the information transmission data with the state of the current controller to determine whether to end the control operation.