KR200377895Y1 - Digital audio broadcasting receiver module capable of controlling and communicating with external apparatus - Google Patents

Abstract

The present invention is a digital audio broadcast receiving module that can control and communicate with an external device, and provides a interface for communication of control commands and data with an external device and generates a control signal for the operation of the digital audio broadcast receiving module. And an RF unit for collecting the signal received from the antenna by the control signal of the microcontroller unit and extracting only the selected frequency signal from the antenna, and converting the signal extracted from the RF unit by the control signal of the microcontroller unit and converting the signal. (Orthogonal Frequency Division Modulation) The present invention relates to a digital audio broadcast receiving module capable of controlling and communicating in an external device including a digital audio broadcast baseband portion decoded by a signal.

According to the present invention, I2C, which is used in a conventional external device in a digital audio broadcast receiving module to easily add a digital audio broadcasting function while minimizing design changes to an external device such as an analog / digital audio / multimedia device, It is configured to support the interface such as SPI, UART, and the interface with the external device is configured to dynamically select the standard supported by the external device from the digital audio broadcast receiving module, so that the digital audio broadcast receiving function can be performed at a conventional external device at a low cost. Can be added to facilitate the dissemination of digital audio broadcasting.

Description

Digital audio broadcast receiving module that can control and communicate with external devices {DIGITAL AUDIO BROADCASTING RECEIVER MODULE CAPABLE OF CONTROLLING AND COMMUNICATING WITH EXTERNAL APPARATUS}

The present invention relates to a digital audio broadcast receiving module that can be controlled and communicated from an external device. More specifically, the digital audio broadcast function can be easily performed while minimizing design changes to an external device such as an analog / digital audio / multimedia device. The digital audio broadcast receiving module may be configured to support I2C, SPI, UART, etc. interfaces used in conventional external devices so that the digital audio broadcast receiving module supports the standard supported by the external device. The present invention relates to a digital audio broadcast receiving module capable of controlling and communicating in an external device capable of adding a digital audio broadcast receiving function to a conventional external device at a low cost by configuring to select dynamically.

With the digitization of various wired and wireless communication systems such as mobile communication, satellite communication, and high-speed subscriber lines, the era of full-scale broadband multimedia service has come. However, the broadcasting sectors such as TV and radio, which are the media that can easily access information such as audio and video in daily life, are relatively less converted to digital systems than other fields.

In particular, in radio broadcasting, analog broadcasting such as AM (Amplitude Modulation) and FM (Frequency Modulation) have provided various information to many people for the last 20 centuries. Power efficiency is reduced by using high transmit power to reduce, and there are technical limitations such as spectral efficiency being degraded by using different frequencies in the near area to avoid co-channel interference.

Digital Audio Broadcasting or Digital Multimedia Broadcasting has been developed to improve the shortcomings of the conventional analog AM or FM broadcasts. It is a mobile multimedia broadcasting service that can provide a variety of additional data services as well as provide a clear video quality service anytime, anywhere with a screen of less than 7 inches even during high-speed travel. These digital audio broadcasts are expected not only to replace current AM and FM broadcasts but also to become new mobile multimedia services.

As a receiver capable of accommodating such digital audio broadcasting, many developments are being made in various forms such as a vehicle receiver, a fixed receiver, a portable receiver, and a receiver for a PC. Current digital audio broadcasting receivers are mostly embedded with digital audio broadcasting reception functions in existing vehicle media players.

The prior art for such a digital audio broadcasting receiver is, for example, a patent registration number of "analog and digital broadcasting composite receiver" filed on February 27, 2001, and registered on September 3, 2003 by PRIZE Korea, Inc. Registered Utility Named "Digital Audio Broadcasting Receiver with Removable Storage Means", filed Nov. 8, 2001 and registered by Jan. 8, 2001 by Prize Korea Co., Ltd. Utility Model Registration No. 20-0262897 or "Digital Audio Broadcasting Receiver with External Display Means", filed Nov. 8, 2001 and registered by Sep. 12, 2002, on September 12, 2002 Registered name of "Portable Digital Audio Broadcasting Receiver" filed on May 1, 2002 and registered on August 23, 2002 by No. 20-0290274 or PREMIUM Korea Co., Ltd. Not disclosed in the No. 20-0288055. These prior art discloses a composite receiver in which digital audio broadcasting or digital multimedia broadcasting receiving system itself or a digital audio broadcasting function is added to an existing receiving medium.

1 is an exemplary block diagram of a digital audio broadcast receiving system according to the prior art.

As shown, the digital audio broadcasting receiving system includes a tuner 110 for collecting a signal received from an antenna and extracting only a selected frequency signal, and an analog-to-digital converter (ADC) for converting the signal received from the tuner 110 to digital. 120, the baseband end / decoding unit 130, 140, and 145 which decodes the digital signal converted by the ADC 120 by Orthogonal Frequency Division Modulation (OFDM), and an audio signal from the decoded signal as an analog signal. It includes a changing digital-analog converter (DAC) 150, a speaker 160 for outputting the converted audio signal, and a controller 170 for managing overall operations. The decoders 140 and 145 include an audio decoder 140 and a data decoder 145. In addition, it may include a key input unit 180 and a display 190 such as an LCD for displaying the current operating state.

Also, the digital audio broadcast receiver may be implemented in a form including a digital audio broadcast receiving module by communicating with an external device such as an analog / digital audio / multimedia device capable of performing other functions. The digital audio broadcast receiving module has a structure that can interface with an external device such as an existing analog audio device or a digital audio / multimedia broadcast receiving device, and thus, it is relatively easy to add a digital audio broadcasting function in time. I have it.

When the digital audio broadcast receiving system having such a structure is implemented in one module form, that is, in the case of the digital audio broadcast receiving module, an external device in which CD play, cassette play, DVD play, and existing analog FM / AM radio functions are combined. Interfacing with the controller requires hardware and software tasks for communication between the controller 170 and the external device. However, a specific interface scheme has not been developed yet.

The purpose of the present invention is to use I2C, which is used in a conventional external device in a digital audio broadcast receiving module to easily add a digital audio broadcasting function while minimizing design changes to external devices such as analog / digital audio / multimedia devices It is configured to support the interface such as SPI, UART, and the interface with the external device is configured to dynamically select the standard supported by the external device from the digital audio broadcast receiving module, so that the digital audio broadcast receiving function can be performed at a conventional external device at a low cost. It is to provide a digital audio broadcast receiving module capable of controlling and communicating in an external device that can add.

In order to achieve the above technical problem, the present invention is a digital audio broadcast receiving module that can be controlled and communicated from an external device, and provides an interface to enable communication of control commands and data with the external device and controls the operation of the digital audio broadcast receiving module. A microcontroller for generating a control signal for the control unit; an RF unit for collecting a signal received from an antenna by a control signal of the microcontroller; and extracting only a frequency signal selected therefrom; and the RF unit by a control signal of the microcontroller. The present invention provides a digital audio broadcast receiving module capable of controlling and communicating in an external device including a digital audio broadcasting baseband unit for converting a signal extracted from the video signal and decoding the same into an OFDM signal.

In the digital audio broadcast receiving module which can be controlled and communicated with an external device according to the present invention, the microcontroller unit preferably communicates with the external device by providing an I2C, SPI, or UART type interface.

In the digital audio broadcast receiving module capable of controlling and communicating in an external device according to the present invention, the microcontroller unit dynamically provides one of the I2C, SPI, and UART interface according to the interface specification used in the external device. It is desirable to.

In addition, in the digital audio broadcast receiving module that can be controlled and communicated from the external device according to the present invention, the microcontroller unit, an external interface for connecting to the interface portion of the external device, and the data communication with the external device through the external interface unit And a controller unit for generating a command to control the digital audio broadcasting baseband unit and the RF unit.

In addition, in the digital audio broadcast receiving module that can be controlled and communicated from an external device according to the present invention, the digital audio broadcast baseband unit, an ADC for converting the signal received from the RF unit to digital, and the digital converted from the ADC It is preferable to include a baseband stage and a decoding unit for decoding the signal into an OFDM signal.

In addition, in the digital audio broadcast receiving module that can be controlled and communicated from the external device according to the present invention, the digital audio broadcast baseband unit, the DAC which converts the audio signal into an analog signal among the signals decoded in the baseband stage and the decoder; And a speaker for outputting the converted analog audio signal.

In addition, in the digital audio broadcast receiving module that can be controlled and communicated from an external device according to the present invention, the digital audio broadcast baseband portion of the decoded signal in the form of a bit stream of the data stream for data service in the external form through the microcontroller portion The data stream is preferably transmitted to a device, and the external device outputs the data stream.

Hereinafter, a digital audio broadcast receiving module that can be controlled and communicated with an external device of the present invention will be described in more detail with reference to the accompanying drawings.

2 is a block diagram of a digital audio broadcast receiving module capable of controlling and communicating in an external device according to the present invention.

As shown, the digital audio broadcast receiving module that can be controlled and communicated with an external device according to the present invention includes a microcontroller unit 210, a digital audio broadcast baseband unit 220, and an RF unit 230.

The microcontroller unit 210 may communicate data with the external device 300, and includes an external interface unit 213 and a controller unit 216.

When the external device 300 sends command data to control the digital audio broadcast receiving module according to the present invention, the data is transmitted to the digital audio broadcast receiving module by one of the general interface methods. Such an interface scheme may be, for example, I2C, SPI, UART, or the like.

In order to receive data transmitted through such an interface, the microcontroller unit 210 is allocated and connected to the hardware corresponding to the interface, and easily communicates with the interface unit of the external device through the external interface unit 213. can do.

That is, when the desired external interface is determined and connected in a corresponding interface manner, the controller unit 216 may generate a corresponding control command to operate the digital audio broadcast receiving module through the external interface unit 213. Therefore, by designing and implementing the desired digital audio broadcasting baseband unit 220 and the RF unit 230 to control them, the design time and the amount of work according to the design can be reduced.

The digital audio broadcasting baseband unit 220 includes an ADC 120 and baseband stage / decoding units 130, 140, and 145. The signal decoded by the decoder is transmitted to the external device through the microcontroller 210 and subjected to DAC conversion in the external device, and then output through the speaker.

Alternatively, the digital audio broadcasting baseband unit 220 may further include a DAC 150 and a speaker 160 for outputting the converted audio signal, and thus may be configured to process itself.

In addition, in the case of a data stream for data service, the data decoded by the digital audio broadcasting baseband unit 220 is transmitted to the external device 300 through the microcontroller unit 210 in the form of a vis stream and output from the external device 300. Can be.

The RF unit 230 includes a tuner, collects a signal received from an antenna, and extracts only a frequency signal selected from the antenna.

3 is a diagram illustrating data transmission between a digital audio broadcast receiving module capable of controlling and communicating with an external device and an external device according to the present invention, in which control data is transmitted from an external device to a receiver module, and FIG. FIG. 3 is a diagram illustrating data transmission between a digital audio broadcast receiving module and an external device that can be controlled and communicated with an external device, wherein control data is transmitted from the receiving module to the external device.

The details of the control / communication between the external device 300 and the digital audio broadcast receiving module are as follows. First, the direction in which control data goes from the external device 300 to the receiving module is defined as a "transmission direction," and conversely, the direction from the receiver module to the external device 300 is defined as a "receiving direction."

As shown in FIG. 3, the transmission direction is controlled by the microcontroller unit 210 using the predefined protocol to transmit control data for controlling the digital audio broadcast baseband unit 220 and the RF unit 230. The external interface unit 213 in the microcontroller unit 210 transmits the same to the controller unit 216. In this case, the controller unit 216 interprets the control data through parsing the received data and, as interpreted, the defined control for the hardware chipset of the digital audio broadcasting baseband unit 220 and the RF unit 230. Generate a signal to set the chipset.

As shown in FIG. 4, the reception direction corresponds to a case in which there is data to be transmitted to the external device 300. Once there is data to be transmitted from the digital audio broadcast baseband unit 220 to the external device, this data is transmitted to the microcontroller unit 210. The data transmitted may be, for example, additional data processed through the data decoder or an audio stream decoded in the audio decoder. The data transmitted to the microcontroller unit 210 is transmitted to the external device 300 through the external interface unit 213, and the external device 300 transmits the information through a display or a speaker mounted in the external device 300. Show or output audio.

5 is a flowchart for controlling and communicating a digital audio broadcast receiving module by receiving control data of the external device in the digital audio broadcast receiving module that can be controlled and communicated with the external device according to the present invention.

First, the system is initialized (S110).

After the interrupt occurs in the external device 300, it is checked whether the interrupt corresponds to which standard (S120).

For example, it is checked whether interrupts such as SPI, UART, and I2C are generated.

After checking and confirming which standard corresponds to the interrupt, the interface for the standard is selected in the external interface unit 213 (S130), and the controller unit 216 uses the digital audio broadcasting baseband unit 220 to use the interface. Initialize the RF unit 230 (S140). That is, the external interface unit 213 supports all interface specifications such as SPI, UART, and I2C, and dynamically communicates with external devices by selecting among the interface standards such as SPI, UART, and I2C according to the interface specification used by the external device. Do this.

After the control command is transmitted from the external device 300 (S150), the control command is received through the external interface unit 213, and the controller unit 216 interprets it to generate the command (S160).

As can be seen through Figure 5, in the digital audio broadcast receiving module that can be controlled and communicated from the external device according to the present invention, the software control of data transmission is a command processed in the module for the external interface and the digital audio broadcast receiving module It is composed of a module for controlling the digital audio broadcasting baseband unit 220 and the RF unit 230 by performing.

The module performing the external interfacing role may be changed according to the interface method of the external device 300. In other words, the module is modularized so that even if the interface method of the external device 300 is changed, the micro device is interlocked through fine modification.

In addition, the module for controlling the digital audio broadcasting baseband unit 220 and the RF unit 230 is implemented to control the chipset for the baseband processing and RF processing selected by the designer, the processing of audio data is an external device ( 300 may be processed to be processed or through an audio DAC part built in the digital audio broadcast receiving module. The processing for the data service may output the data information received through the digital audio broadcast receiving module to the external device 300 in the form of a bit stream.

Although the present invention has been described by way of example only, it is for illustrative purposes only, the scope of protection of the present invention is not limited by these examples, the protection scope of the present invention is defined through the description of the claims .

According to the present invention, I2C and SPI used in conventional external devices in the digital audio broadcast receiving module can be easily added to the digital audio broadcasting function while minimizing design changes to external devices such as analog / digital audio / multimedia devices. , The UART interface and the like, and the interface with the external device is configured to dynamically select the standard supported by the external device in the digital audio broadcast receiving module to provide digital audio broadcast receiving function to the conventional external device at low cost. Since it can be added, the spread of digital audio broadcasting can be promoted.

1 is an exemplary block diagram of a digital audio broadcast receiving system according to the prior art.

2 is a block diagram of a digital audio broadcast receiving module capable of controlling and communicating in an external device according to the present invention.

3 is a data communication between a digital audio broadcast receiving module capable of controlling and communicating in an external device and an external device according to the present invention, and showing that control data is transmitted from the external device to the digital audio broadcast receiving module.

4 is a diagram illustrating data transmission between a digital audio broadcast receiving module and an external device that can be controlled and communicated with an external device according to the present invention, in which control data is transmitted from the digital audio broadcast receiving module to the external device.

5 is a flowchart for controlling and communicating a digital audio broadcast receiving module by receiving control data of the external device in a digital audio broadcast receiving module that can be controlled and communicated with an external device according to the present invention.

<Description of the symbols for the main parts of the drawings>

110: tuner 120: ADC

130: baseband stage 140: audio decoder

145: data decoder 150: DAC

160: speaker 170: controller

180: key input unit 190: display

210: microcontroller unit 213: external interface unit

216: controller portion 220: digital audio broadcasting baseband portion

230: RF unit 300: external device

Claims (7)

Digital audio broadcast receiving module that can control and communicate from an external device, A microcontroller unit providing an interface to communicate control commands and data with an external device and generating a control signal for operation of the digital audio broadcast receiving module; An RF unit for collecting the signal received from the antenna by the control signal of the microcontroller and extracting only the selected frequency signal from the antenna; The digital audio broadcasting baseband unit converts the signal extracted by the RF unit according to the control signal of the microcontroller unit and decodes it into an Orthogonal Frequency Division Modulation (OFDM) signal. Digital audio broadcast receiving module capable of control and communication from an external device comprising a. The method of claim 1, The microcontroller unit provides I2C, SPI, and UART interface to communicate with the external device. The method of claim 2, The microcontroller unit is a digital audio broadcast receiving module capable of controlling and communicating in an external device to dynamically provide one of the interface of the I2C, SPI, UART type according to the interface specification used in the external device. The method of claim 1, The microcontroller unit, An external interface for connecting with the interface portion of the external device, The controller unit performs data communication with the external device through the external interface unit and generates a command to control the digital audio broadcasting baseband unit and the RF unit. Digital audio broadcast receiving module capable of controlling and communicating in an external device comprising a. The method of claim 1, wherein the digital audio broadcast baseband unit, An analog-digital converter (ADC) for converting the signal received from the RF unit into digital; A baseband stage and a decoder for decoding the digital signal converted by the ADC into an orthogonal frequency division modulation (OFDM) signal Digital audio broadcast receiving module capable of controlling and communicating in an external device comprising a. The method of claim 5, wherein the digital audio broadcast baseband unit, A digital-analog converter (DAC) for converting an audio signal into an analog signal among the signals decoded in the baseband terminal and the decoder; Speaker to output converted analog audio signal Digital audio broadcast receiving module that can be controlled and communicated from the external device further comprising. The method of claim 1, The digital audio broadcasting baseband unit, Among the decoded signal is to transmit a data stream for data service to the external device through the microcontroller in the form of a bit stream, And the external device outputs the data stream. The digital audio broadcast receiving module can control and communicate with the external device.