KR20030025602A - Digital Audio brodcasting Receiver having a function of receiving moving image - Google Patents

Abstract

PURPOSE: A digital audio broadcasting receiver having a motion picture receiving function is provided to receive a multimedia motion picture with an audio signal, and to restore data of each signal, then to store the received data, thereby transmitting the stored data outside. CONSTITUTION: A digital audio broadcasting receiver(10) comprises as follows. A digital broadcasting signal processor(12) processes digital broadcasting signals. An audio output unit(15) outputs an audio signal of the digital broadcasting signals. A video output unit(16) displays an operation state, and outputs motion picture data of the digital broadcasting signals. A storage(13) stores digital data and a driving program. A controller(11) receives external digital audio broadcasting signals, and controls each unit to process the digital signals. A communication unit(14) transmits additionally stored data outside.

Description

Digital audio brodcasting receiver having a function of receiving moving image}

The present invention relates to a digital audio broadcasting receiver having a video receiving function.

More specifically, a video reception function configured to selectively receive digital signals including analog and video signals to restore and output data of each signal, and further, to store and transmit the received data to an external device. It relates to a digital audio broadcast receiver having.

Currently, the transmission method in a broadcast medium is changing from an analog transmission method to a digital transmission method. Digital radio broadcasting has been proposed in two ways. One is the EUREKA-147 scheme jointly proposed by Pan-Europe and the other is the IN-BAND scheme proposed by the United States. Among the two methods, many countries are currently selecting the new method, EUREKA-147, as their standard and preparing or implementing broadcasting service.

As shown in FIG. 1, the digital broadcasting system includes a broadcast service using terrestrial waves and a service using satellites in a local broadcasting station.

In the satellite broadcasting, a signal is transmitted from a terrestrial digital broadcasting earth station to a satellite for digital broadcasting, and the transmitted signal is received by the satellite and downstream through the L-band.

In the above-described terrestrial broadcasting system, a digital broadcasting station directly outputs a digital broadcast.

Broadcast signals output by these two methods are received by mobile and fixed digital receivers.

According to this preparation process, it takes considerable time for the analog broadcasting system to be completely converted to the digital broadcasting system. Therefore, the period of coexistence of analog broadcasting and digital broadcasting will continue for a long time, and only one broadcasting method can be received during the period of analog broadcasting and digital broadcasting coexisting with a single method, that is, an analog dedicated receiver or a digital dedicated receiver. There is a problem that can not provide simultaneous reception for the two broadcast schemes, that is, analog broadcast and digital broadcast.

In addition, the conventional digital broadcasting receiver has a problem that can not receive video data.

An object of the present invention to solve the above problems is to provide a digital audio broadcasting receiver having a video receiving function capable of receiving digital audio broadcasting including analog broadcasting and video.

In another aspect, the present invention provides a digital audio broadcast receiver to receive additional services using a radio data system, to reproduce and store the received digital broadcast as audio and video signals and to transmit to the outside using a portable communication To do it for another purpose.

1 is a diagram illustrating the concept of digital broadcasting;

2 is a block diagram showing a block of a digital audio broadcasting receiver having a video receiving function as a preferred embodiment according to the present invention;

3 is a block diagram of a digital signal processor;

Description of the main symbols in the drawings

10: digital audio broadcast receiver

11 control unit 12 digital signal processing unit

13 storage unit 14 communication unit

15: audio output unit 16: video output unit

26: video decoder

The present invention for achieving the above object is a digital signal processing unit for receiving and processing digital broadcast therein, a storage unit for storing the received broadcast data, and a communication unit for transmitting the stored broadcast data to the outside and the received digital broadcast And an audio output unit for outputting an audio signal and a video output unit for outputting a moving image or an image. The digital audio broadcasting receiver having a video receiving function according to the above-described configuration may be developed into various types of products such as a car audio, a portable receiver, a pc-card type, or a built-in card type of a broadcasting device.

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention will be described in more detail the present invention.

2 is a block diagram of a digital audio broadcasting receiver having a video receiving function as a preferred embodiment of the present invention.

As shown in FIG. 2, the digital audio broadcast receiver 10 having a video reception function according to the present invention includes an antenna, a digital broadcast signal processor 12 performing digital broadcast signal processing, and audio out of a digital signal processed broadcast signal. An audio output unit 15 for outputting a signal, a video output unit 16 for displaying a reception state of a broadcast and an operation state of each component, and outputting moving image data among the digital signal processed broadcast signals, digital data and And a storage unit 13 for storing a driving program and a control unit for controlling each component to receive an external digital audio broadcast signal and to process a digital signal, and a communication unit provided to transmit data additionally stored in the configuration to the outside. It may be configured to further include (14).

In addition to the above-described configuration, a key input unit for receiving a user's control signal may be further configured.

Each of the above-described components may be implemented in the form of a predetermined chip and attached to a substrate for the digital audio broadcasting receiver 10 according to the present invention. It is also possible to connect to an external output means using a jack or the like as the predetermined connection means.

The above antenna has a digital broadcasting antenna.

The above-described control unit 11 has an automatic channel search function, an automatic channel storage function, a data display function of a received additional service, an RS-232 output function of a received additional data, an alarm function in a non-service area, and an automatic display function of another medium. It displays the search status, additional data, etc. on the front LCD, saves the last channel, and operates the remote controller. In addition, the above-described control unit 11 transmits a control signal for operating the corresponding component to each component of the digital audio broadcasting receiver 10 to control the entire component.

The digital signal processor 12 implements a method for receiving a digital broadcast signal in a conventional digital broadcast technology, and an operation process thereof will be described in more detail with reference to FIG. 3.

The storage unit 13 stores audio and data information desired by a user, and a flash memory, a hard disk, a floppy disk, a DVD, or the like may be used as the storage medium.

The communication unit 14 provides a communication interface with the outside in case of transmitting the broadcast signal received by the digital audio broadcasting receiver 10 to the outside, and wireless transmission function, or external equipment by RS-232 and various communication interfaces. Performs a connection function with Here, the externally connected equipment is a remote controller, a PC, a notebook, a PDA, a mini disc player, a CDR, a cassette recorder, an MP3 player, a cell phone, or an analog and digital broadcast receiver.

The operation of the above-described digital audio broadcasting receiver 10 will be described below.

The digital broadcast signal is input through an antenna and the digital signal processor 12 performs signal processing according to a preset operation mode to display data on the video output unit 16 and to output audio through the audio output unit 15. Will print. In addition, when the user requests, the data may be stored in the storage unit 14 and may be transmitted to other external devices such as a PC or an audio device through the communication unit 15.

The digital audio broadcast signal performs data restoration and amplification and D / A conversion, and stores the result signal in a storage unit or transmits the result to the outside through a communication unit, outputs audio through an output unit, and a video signal through a display unit. Or outputs a data signal. The video signal and the data signal are output through the video output unit 16.

FIG. 3 is a block diagram showing the configuration of the digital signal processing unit 12 included in the digital audio broadcasting receiver 10 of FIG.

As shown, the digital signal processor 12 includes a down converter 21, a front end 22, an analog-to-digital converter (hereinafter referred to as an ADC) 23, a data / audio decoder 24, and an audio DA. It comprises a converter 25 and a video decoder 26.

The down converter 21 converts the received high frequency signal into a frequency band that can be processed by the front end 22.

The front end 22 filters the input frequency into the intermediate frequency IF for filtering and decoding. In addition, the front end 22 communicates with the control unit 11 and is set according to the frequency to be received according to the tuner control signal input from the control unit 11. In addition, the signal input from the front end 22 is subjected to OFDM modulation on the signal converted by OFDM modulation, frequency modulation, DQPSK encoding, time interleaving, and Viterbi encoding performed by the transmitter, and error correction is performed. A frequency interleaving signal is recovered, and after decoding the DQPSK coded signal, the interleaving for time is reconstructed in the time deinterleaver and the Viterbi decoder is decoded.

The data / audio decoder 24 decodes channel information and data audio information from the input signal. The channel information decoded in this process is transmitted to the control unit 11 so that the control unit 11 converts audio information of the channel designated by the control unit 11 into the audio DA converter 24 and the audio output unit 16 using the channel information. Output through

In this process, the data / audio decoder 24, unlike conventional analog methods, decodes the program related data (data such as the title of a broadcast, a title of a song, a singer's name, a news title, and a related picture) to a transmitted signal. The data information signal is transmitted to the control unit so that the information data (data such as traffic situation, stock information, text message, photo, etc.) is transmitted to the user through the control unit 11. In addition to the above-described transmission process, the data / audio decoder 24 transmits channel information to the controller 11 as described above. In addition, the decoder 11 receives the decoder control signal from the controller 11 so as to perform decoding to output a broadcast signal of a channel desired by the user, and transmits and outputs data information of the corresponding channel to the controller.

The above-described video decoder 26 receives the digital video data as a video decoded by the data audio decoder, processes the digital signal to be output through the video output unit 16, and transmits the digital signal to the video output unit 16.

The method of transmitting the above-mentioned moving picture data in a digital audio broadcasting signal includes a multimedia object transfer (MOT) encoding and decoding based on a study of Eureka 147, a digital audio broadcasting standard, packet mode or PAD (Program Associated Data). A signal encoded and multiplexed by a DAB broadcasting station by a method of encoding and decoding and transmitted through an additional channel of the DAB broadcasting signal is received by a digital audio broadcasting receiver having a multimedia receiving function according to the present invention and encoded by the above-described MOT and PAD. The extracted signal is decoded and the extracted signal is decoded as a multimedia signal to decode and output data such as a moving picture and an image so as to be output from the video output unit 18.

The above-described reproduction of the video signal may be configured such that data is transmitted and output in a variable manner at a speed of a transmission channel using a streaming technique.

As the coding scheme for the above-described video data, a multimedia object transfer coding scheme, a packet coding scheme, and a program complex data coding scheme may be used.

Next, a digital signal processing process will be described with reference to the above-described description of each component.

When the digital audio broadcast receiver 10 receives the digital broadcast signal, the digital broadcast signal is transmitted to the digital signal processor 12. The transmitted signal is converted into a frequency band that can be processed by the front end 21 by the down converter 21 and input to the front end 21. The frequency converted by the down converter 21 is input to the front end 21, and the frequency signal input to the front end 21 is converted into an intermediate frequency IF for filtering and decoding. The signal converted to the intermediate frequency is bandpass sampled by the ADC 23 and input to the data / audio decoder 8. The data / audio decoder 8 decodes channel information, data, video, and audio information from the input signal, and outputs audio information of the channel designated by the controller through the audio DA converter 21 and the audio output unit 17. At the same time, the data or video information is decoded and transmitted so that the data information is output through the video output unit 16.

In the above-described configuration, it is obvious that a key input unit is additionally configured in the digital audio broadcasting receiver 10 to receive a user's control command.

The present invention overcomes the conventional digital audio broadcasting receiver having a reception limited to a still picture at the time of switching from analog broadcasting to digital broadcasting so that video data can be transmitted and received in an additional signal region of the digital audio broadcasting signal. Provide effect.

Claims (3)

An antenna for receiving an external broadcast signal; A digital signal processor which processes the digital broadcast signal received from the antenna; An audio output unit configured to output an audio signal among the digital signal processed broadcast signals; A video output unit which displays a reception state of a broadcast and an operation state of each component, and outputs moving image data among the digital signal processed broadcast signals; A storage unit for storing digital data and a driving program; And And a control unit for controlling each component to receive an external digital audio broadcast signal and to process the digital signal. The method of claim 1, wherein the digital signal processing unit A down converter converting the high frequency signal received by the antenna into a low frequency; A front end for converting the low frequency signal converted by the down converter into an intermediate frequency; An analog-digital converter for converting the intermediate frequency converted at the front end into a digital signal; A data / audio decoder for decoding data and audio signals in the signal converted by the analog to digital converter: A video decoder which decodes video data included in the digital signal to output to the video output unit; And And an audio DA converter for converting the audio signal decoded by the data / audio decoder into an analog signal to output an audio signal. The method of claim 1, wherein the coding method comprises: A digital audio broadcasting receiver having a video receiving function, characterized in that the multimedia object transfer coding method, the packet coding method and the program complex data coding method.