KR20060121389A - Apparatus and method for recent digital broadcasting receiving using former digital broadcasting receiver - Google Patents

Abstract

A new digital broadcasting receiving apparatus and method using an old digital broadcasting receiving apparatus are provided to receive new digital broadcasting using an old digital broadcasting receiver. A digital broadcasting receiving apparatus includes a tuner(410), a demodulator(420), a controller(430), a decoder(440), a memory(450), an image display(460), an audio output unit(470) and an input unit(480). A signal output from the demodulator is error-corrected through an error corrector. A demultiplexer outputs a signal other than broadcasting information to an IP data splitter to unpack IP using an error-corrected or bypass signal and transmits the signal to the decoder. The demultiplexer transmits the broadcasting information to a PSI(Program Specific Information)/SI(System Information) processor. The PSI/SI processor outputs processed data to a PSI/SI buffer and a time-division processor. The decoder executes only a video/audio decoding function.

Description

New digital broadcasting receiver and method using old digital broadcasting receiver {APPARATUS AND METHOD FOR RECENT DIGITAL BROADCASTING RECEIVING USING FORMER DIGITAL BROADCASTING RECEIVER}

1 is a structural diagram showing the configuration of a conventional spherical digital broadcasting receiver;

FIG. 2 is a diagram illustrating a configuration of a demodulator of FIG. 1. FIG.

3 is a diagram illustrating a configuration of a decoding unit of FIG. 1.

4 is a structural diagram showing the configuration of a new digital broadcasting receiver;

FIG. 5 is a diagram illustrating a configuration of a demodulator of FIG. 4. FIG.

FIG. 6 is a diagram illustrating a configuration of the media control unit of FIG. 4. FIG.

FIG. 7 is a diagram illustrating a configuration of the decoding unit of FIG. 4. FIG.

8 is a structural diagram showing a configuration capable of receiving new digital broadcasting using an old digital broadcasting receiving apparatus;

9 is a diagram illustrating a configuration of a control unit of FIG. 8.

10 is a diagram illustrating the configuration of a decoder of FIG. 8. FIG.

11 is a diagram showing the structure of a conventional portable communication terminal.

12 illustrates an embodiment in which the present invention is applied to a conventional mobile communication terminal.

13 is a view showing another embodiment in which the present invention is applied to a conventional mobile communication terminal.

14 shows another embodiment in which the present invention is applied to a conventional mobile communication terminal.

The present invention relates to an apparatus and method for digital broadcast reception, and more particularly, to an apparatus and method for receiving and processing a new digital broadcast using an old digital broadcast receiver.

As digital broadcasting is emphasized on portability and mobility, it requires a small size as possible, and a device and method for realizing it at a low price since it is not yet popularized at a high price. However, due to the change of digital broadcasting standard, it is inevitable to change the digital broadcasting receiver, and due to the disadvantage that it can not be processed without a separate circuit to realize a new function, the configuration is complicated and large to add to the current device. The price also increased.

In addition, in the case of mounting a digital broadcasting receiver in a portable terminal, a control unit and a calculating unit for portable communication must be provided and a digital broadcasting receiving control unit and a calculating unit must be provided. A problem occurred.

The present invention has been made to solve the above problems, it is an object of the present invention to provide an apparatus and method for enabling a new digital broadcast reception even when using a conventional digital broadcast receiver used in the prior art.

Another object of the present invention is to provide an apparatus and method for receiving an old digital broadcast while receiving a new digital broadcast using an old digital broadcast receiver.

Another object of the present invention is to provide an apparatus and method for processing power consumption reduction and data broadcasting enhancement, which are features of new digital broadcasting, using an old digital broadcasting receiver.

Meanwhile, an object of the present invention is to provide an apparatus and a method in which a portable communication unit and a digital broadcast receiver share a controller and a calculator.

It is also an object of the present invention to provide a computer readable recording medium having recorded thereon a program for realizing the above method.

DETAILED DESCRIPTION Hereinafter, a detailed description of the present invention will be described with reference to the accompanying drawings.

One example of the 'new digital broadcasting' referred to in the present invention may be 'DVB-H' which is a European digital broadcasting standard, and one example of the 'old digital broadcasting' corresponding thereto may be 'DVB-T'.

In the following description, specific details of the prior art and examples are shown to provide a general understanding. It will be apparent to those skilled in the art that the present invention may be readily practiced without these specific details and also by these modifications.

An embodiment of the present invention relates to a device and a method for enabling new and old digital broadcast reception by using an old digital broadcasting device without using a new digital broadcasting device introduced to receive a new digital broadcast. Therefore, it is possible to greatly simplify the device configuration by enabling new digital broadcasting reception without having a separate specialized new digital broadcasting reception device, and thus, it is possible to mount the device in a small area, and to drive the device. This has the advantage of being simplified. The digital broadcasting receiver includes a tuner, a demodulator, a decoder, and a controller, and includes a memory, an input unit, an image display unit, and an audio output unit. An embodiment of the present invention looks at the details of the above configuration and proposes a configuration and method for performing a digital broadcasting reception function.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Fig. 1 is a diagram showing the configuration of a conventional spherical digital broadcasting receiver. 1 shows a configuration in which the digital broadcasting receiver includes a tuner unit 110, a demodulator 120, a decoder 150, and a controller 100. In addition, the input / output device includes an image display unit 170, an audio output unit 180, and an input unit 190, and a memory device 160 as a storage device.

In FIG. 1, the image display unit 170 and the audio output unit 180 may be controlled by the controller 100, and the decoded video / audio signal may be directly output from the decoder 150. In other words, whether the controller 100 or the decoder 150 of the video / audio control and output unit may be changed according to the configuration of each device.

The controller 100 performs a function of performing overall control of the digital broadcasting receiver. In particular, the control of the digital broadcasting receiver and system initialization according to the input from the input unit 190, the control of the tuner unit 110 and the demodulator 120 for changing the physical channel, the demodulator 120 and the decoder 150 for service change and adjustment The control unit performs output control of the image display unit 170 and the audio output unit 180.

The tuner 110 selects a broadcast channel according to the physical channel change control signal of the controller 100 and converts an RF signal of the selected channel. The input signal may be an RF signal received from an antenna, and the frequency may be a signal in a VHF, UHF, L-Band, or S-Band region. In addition, the output may be an IF signal through frequency downconversion, or may be an in-phase / quarature (IQ) signal.

The demodulator 120 receives an intermediate frequency output or a sine / cosine output of the tuner 110 as an input, and demodulates the demodulated data in a set demodulation scheme. The output of the demodulator may be MPEG-2 TS. Hereinafter, the details of the demodulator 120 will be described.

2 is a diagram illustrating a detailed structure of the demodulator 120. The signal input to the demodulator is converted into a digital signal by the analog-to-digital converter 121, and in this process, the output level is adjusted through the automatic amplification adjustment 122. The digital signal is baseband converted into a frequency band actually processed by the baseband converter 123. The baseband signal is output by filtering only the result where the actual signal is located by the filtering and interpolation unit 124. The time and synchronization controller 127 delivers the basic frequency and time adjustment values to be processed according to each mode, and there are clocks, guard intervals, and carriers as control criteria. Can be. The FFT unit 128 receives the filtered input signal and demodulates the OFDM modulation in Coded Orthogonal Frequency Division Multiplexing (COFDM), which is an example of a digital broadcasting modulation method. ) Take the number as input and process accordingly. The channel decoding unit 126 rearranges and outputs demodulated information according to information transmission methods such as QPSK, 16QAM, and 64QAM, and also outputs TPS (Transmission Parameter Signaling) information that is first extracted during the rearrangement process. The TPS unit 128 is fed back to the time and synchronization adjusting unit 127 to be used as control information of the demodulation process. The Viterbi decoding unit 129 fills in the empty (Punctured) information of the demodulated and rearranged information. Finally, the data transmitted to the RS decoding unit 130 is output through a Reed-Solomon error correction process.

The decoder 150 receives the signals output from the demodulator 120 and separates them into video, audio, and general information, respectively, decodes them, outputs them as video and audio signals, and analyzes and outputs general information. In this case, the video signal may be an RGB or YUV signal that can be received as an input from the digital image display unit, and the audio signal may be a PCM signal or a general analog output that can be input as an input from the audio output unit. Hereinafter, the details of the decoder 150 will be described.

3 is a diagram showing the detailed structure of the decoder 150. As shown in FIG. The first input is applied to the demultiplexer 151 and PSI / SI (Program Specific Information / System Information), which is broadcast related information, is separately processed by the PSI / SI processor 158 and stored in the PSI / SI output buffer 159. The demultiplexed signal is divided into video and audio signals and stored in the input buffer 152, which is transmitted to the video decoder 153 and the audio decoder 156, respectively. The video signal decoded by the video decoder 153 is stored in the video output buffer 154 in the form of RGB or YUV, and the audio signal decoded in the audio decoder 156 is stored in the audio output buffer 157 in the form of PCM. At this time, the AV synchronizer 155 determines the decoding progress signal received from the video decoder 153 and the audio decoder 156, and transmits the video and audio output commands to the video output buffer 154 and the audio output buffer 157.

The memory 160 is used by the controller 100 and the decoder 150 to store programs for receiving digital broadcasts, and to store programs for driving an apparatus according to an embodiment of the present invention. The memory may be used as a data memory of the controller 100 and the decoder 150. The data stored in the memory may be temporary data or output video / audio information used in the decoding process, and may be PSI / SI information about a broadcast reception state in the control process.

The image display unit 170 outputs a broadcast image output from the decoding unit 150 and a program window output from the control unit 100. For example, the image display unit 170 includes an LCD. The voice output unit 180 outputs the broadcast voice output from the decoder 150 and other voice signals output from the control unit 100 and may exist as a speaker alone or include a voice codec.

The input unit 190 includes keys for inputting numeric and text information and function keys for setting various functions. It may also include a touch screen or remote control signal input. A user's input may be received through the input unit 190, and the input may be transmitted to the control unit 100 and used to control the system.

4 is a diagram showing a configuration of a conventional new digital broadcasting receiver. 4 illustrates a configuration in which the digital broadcasting receiver includes a tuner 210, a demodulator 220, a media controller 240, and a controller 200. In addition, the input / output device includes an input unit 300, an image display unit 280, and an audio output unit 290, and a storage device includes a memory 270.

In the following description, the characteristics of the new digital broadcasting receiver will be described through comparison with the old digital broadcasting receiver.

4, the image display unit 280 and the audio output unit 290 may be controlled from the controller 200 and / or the decoder 250. In addition, the operations of the control unit 200 and the tuner unit 210 are the same as those of the old digital broadcasting receiver of FIG. 1.

The demodulator 220 and the media controller 240 may be generally configured in one piece of hardware, but the present patent specifies that the demodulator 220 and the media controller 240 are formed of different hardware to facilitate understanding.

FIG. 5 is a diagram illustrating a detailed configuration of a demodulator 220 of the new digital broadcasting receiver in FIG. 2. The flow from the analog-digital conversion unit 221 to the RF decoding unit 230 is similar in general, but has an extended TPS unit 228 therein. Compared with the previous configuration TPS 128 of Figure 2, the example of the DVB-H standard, a new digital broadcasting standard, shows 4K carrier, DVB-H, time-slicing, error correction (MPE-FEC). ) Contains information. In addition, it is characterized by having a separate power control unit 231 for power management for all components.

FIG. 6 is a diagram illustrating a detailed configuration of the media control unit 240 of the new digital broadcasting receiver in FIG. 2. The time division processing unit 242 determines whether the broadcast information selected by the user or the broadcast information to be processed using the broadcast information stored in the PSI / SI output buffer 261 of FIG. 7 in performing time division transmission, which is the standard for the new digital broadcast reception. . In addition, the reception information is output, and the data to be processed is bypassed and output. The power management unit 241 controls power on / off of other devices, that is, the tuner 210 and the demodulator 220, according to the output of the time division processor 242. The error correction unit 243 corrects an error using the data bypassed by the time division processing unit 242 and transfers the error to the operation memory 244. At this time, the input may be MPE (Multi-Packet Encapsulation) data, and the error correction method may be a Reed-Solomon (RS) method which is Multi-Packet Encapsulation-Forward Error Correction (MPE-FEC). The time-correction processing unit 242 reads the error-corrected data from the operation memory 244 and transfers the data to the data output unit 246 again. Meanwhile, the external command processor 245 processes a command of an external user related to channel change and broadcast information reception and transmits the command to the time division processor 242.

FIG. 7 is a diagram illustrating a detailed configuration of a decoder 250 of the new digital broadcasting receiver in FIG. 2. The decoding unit 150 of the old digital broadcasting receiver will be described with reference to FIG. 3. The first input data is applied to the demultiplexer 251 to determine whether it is broadcast information or general video / audio information, and the output direction is changed. The reference information used at this time may be PID (Product ID). Among the output data, broadcast information is transmitted to the PSI / SI processing unit 260, analyzed / processed, and transmitted to the PSI / SI output buffer 261. The information stored at this time includes information for time division processing in addition to the basic information stored in the old digital broadcasting receiver. The video / audio information among the demultiplexed data is transmitted to the IP data divider 252, which is processed once more by the IP data divider 252 compared to that delivered to the input buffer 152 for common video / audio in the old digital broadcasting receiver. There is a difference. Therefore, the video input buffer 253 and the audio input buffer 256 are transmitted separately instead of the common input buffer. As a result, the demultiplexer 251 determines whether the output direction is determined by determining whether or not it is broadcast information. The video input buffer 253 is decoded by the video decoder 254 and stored in the video output buffer 255 and the audio input buffer 256 is decoded by the audio decoder 257 and stored in the audio output buffer 258 and in the AV synchronizer 259. The process of controlling and decoding the decoding and output processes thereof is the same as that of the old digital broadcasting receiver.

The memory 270, the image display unit 280, the audio output unit 290, and the input unit 300 are the same as those described with reference to FIG. 1.

8 is a diagram showing the configuration of a new digital broadcast receiver using an old digital broadcast receiver according to an embodiment of the present invention. 8 illustrates a configuration in which the digital broadcasting receiver includes a tuner unit 410, a demodulator 420, a controller 430, and a decoder 440. In addition, the storage device includes a memory 450, and the input / output device includes an image display unit 460, an audio output unit 470, and an input unit 480.

Referring to FIG. 8, the tuner 410 and the demodulator 420 can use the old digital broadcast receiver of FIG. 1 without adding or modifying functions. Hereinafter, the details of the control unit 430 and the decoding unit 440 according to some modification of some internal functions will be described.

9 is a view illustrating details of the controller 430 of FIG. 8. The signal output from the demodulator 420 is input to the error correction unit 431 and undergoes an error correction process, which can be processed by using a control function and a calculation function. On the other hand, this process is a process for improving the performance of broadcast reception and can be omitted depending on the processing power of the signal processing and the process can be moved to the next process. The demultiplexer 432 outputs the IP data splitter 433 to the decoder 440 through the process of unpacking the IP if it is not broadcast information using an error corrected or bypassed signal. In case it passes to the PSI / SI processor 434. The PSI / SI processor 434 outputs the processed data to the PSI / SI output buffer 435 as well as to the time division processor 436. The time division processing unit 436 determines only the reception according to the output of the PSI / SI processing unit without any complicated process, and outputs it to the power control unit 437. The power control unit 437 performs the control to turn on / off the power of an externally connected device. The determination of whether the time division processing unit 436 is received depends on a user input received from the external command processing unit 438.

In this process, the PSI / SI output buffer 435 may be omitted. In addition, the time division processing unit 436 can receive the real-time broadcasting information that is not buffered without delay, and there is no need for a complicated process for determining the time information inside the time division processing unit 436. Can be lowered. In addition, the power control function and the power management function for the configuration of the new digital broadcasting receiver has a single power control unit 437 compared to the separate has the advantage. In addition, despite the presence of a control unit that already includes control and arithmetic functions, there is an advantage in that the dual consumption of having a media control unit requiring control and arithmetic functions for the media control function can be reduced.

FIG. 10 is a diagram illustrating details of the decoding unit 440 of FIG. 8. Referring to FIG. 3, which is the detail of the decoding unit 150 of the old digital broadcasting receiver, and FIG. 7, which is the detail of the decoding unit 250 of the new digital broadcasting receiver, only the simple video / audio decoding function needs to be performed. Decoding can be performed. The video input buffer 441 receives and stores an image signal and outputs it. The audio input buffer 444 receives and stores an audio signal. In the video decoder 442, the video signal is decoded and stored in the video output buffer 443 in the form of RGB or YUV. In the audio decoder 445, the audio signal is decoded and stored in the audio output buffer 446 in the PCM format. At this time, the AV synchronizer 447 determines the decoded cooling signal and determines the video and audio viewpoints.

In particular, as described above, since the decoding unit 440 according to the present invention has the same structure as a general multimedia decoding apparatus, the decoder 440 does not implement a dedicated decoder for a digital broadcasting receiver, but is implemented in a conventional technique. It has the advantage of being available.

Hereinafter, a configuration when applied to a mobile communication terminal as one embodiment of the present invention described above will be described.

11 is a general structural diagram of a conventional mobile communication terminal. The tuner 510 receives an RF signal received from an antenna and outputs a baseband signal. The data processor 520 processes the baseband signal and outputs digital data. The processed content is transmitted to the control unit 500, and receives feedback from the voice processing unit 530 for call / voice processing, which is a core function of the mobile communication terminal. The control unit 500 manages the management of the entire system. In this process, the memory 540 is connected to the data processor 520 and the controller 500 to be used as a data memory or a program memory. On the other hand, the control unit is connected to the input unit 570 to receive the user's input, the processed data is output using the audio output unit 550 and the video display 560.

12 is a diagram illustrating a configuration in which a digital broadcasting reception function is added to a portable communication terminal according to an embodiment of the present invention. At this time, the digital broadcasting receiver is an old digital broadcasting receiver, characterized by being capable of receiving new digital broadcasting. The broadcast receiving tuner 410, the demodulator 420, and the decoder 440 are connected to the configuration of the portable communication terminal, and the control unit, memory, input unit, video display unit, and audio output unit of the digital broadcast receiver unit exist alone. It can be used publicly. The controller 500 controls the broadcast reception tuner 410, the demodulator 420, and the decoder 440 in addition to the portable communication terminal, and the functions thereof are the same as those in FIG. The function of the control unit 500 is possible because the control unit of the existing mobile communication terminal has sufficient arithmetic processing and control performance. This configuration constitutes an essential part of the digital broadcasting receiver and enables digital broadcasting reception on the mobile communication terminal. Let's do it.

FIG. 13 is a block diagram illustrating a configuration for enabling digital broadcasting reception in a mobile communication terminal according to another embodiment of the present invention. The decoding unit 440 of FIG. 12 is omitted, and the control unit 500 of the mobile communication terminal is rapidly increasing in computational processing capability according to the rapid development of technology. . Examples of the control / operation device having the multimedia processing capability include Qualcomm's MSM and TI's OMAP. In the above configuration, the control unit 500 not only performs the control function of FIG. 12 but also performs a decoding function of digital broadcasting reception.

FIG. 14 is a block diagram showing a configuration for enabling digital broadcasting reception in a mobile communication terminal as another embodiment of the present invention. Similar to FIG. 13, the data processor 520 manages the input / output device. That is, the data processing unit 520, which is the main body of data processing, not the control unit 500, which is the main body of control, is connected to the image display unit 560, the audio output unit 550, and the input unit 530.

The present invention as described above, there is an effect that can receive a new digital broadcast by using a relatively low-cost old digital broadcast receiver.

In addition, the present invention, there is an effect that can be mounted on the portable terminal to receive digital broadcasting without a separate operation unit or control unit.

Claims (11)

In a digital receiver, An RF tuner unit for converting an RF signal received from an antenna into a processable IF signal or an IQ signal; A demodulator for demodulating the converted signal and outputting the processed signal as raw data; A broadcast information extraction operator for extracting broadcast information data from the demodulated broadcast data; A control unit for performing power management and reception selection using the extracted broadcast information; An error correction operation unit for correcting errors in the received data of the selected broadcast; And a decoding operation unit configured to output video and audio data by decoding the error corrected data. The apparatus as claimed in claim 1, wherein the RF tuner unit and the demodulator unit are spherical digital receivers. The apparatus as claimed in claim 2, wherein the broadcasting information extraction calculating unit and the error correction calculating unit are processed in the same calculating unit. 3. The apparatus as claimed in claim 2, wherein the broadcasting information extraction calculation unit, the error correction operation unit, and the decoding operation unit are processed in the same operation unit. The apparatus as claimed in claim 2, wherein the apparatus supports a power consumption reduction function which is a feature of new digital broadcasting. The apparatus as claimed in claim 2, wherein the apparatus supports a data broadcasting enhancement function which is a feature of new digital broadcasting. In a mobile terminal having a digital broadcasting receiver and a portable communication device at the same time, The apparatus characterized in that the RF tuner unit and the demodulation unit of the digital broadcasting receiver is an old digital receiver. 6. The apparatus as claimed in claim 5, wherein the broadcasting information extraction calculating unit, the error correction calculating unit, and the decoding operation unit are processed in the same calculating unit. 6. The apparatus as claimed in claim 5, wherein the broadcasting information extraction calculating unit, the error correction calculating unit, and the decoding operation unit are processed in the same calculating unit. In a mobile terminal having a digital broadcasting receiver and a portable communication device at the same time, The apparatus of claim 1, wherein the arithmetic processing of the digital broadcasting receiver and the arithmetic processing of the mobile communication apparatus are processed in the same arithmetic unit. In a mobile terminal having a digital broadcasting receiver and a portable communication device at the same time, The apparatus characterized in that the control process of the digital broadcasting receiver and the control process of the mobile communication device are processed by the same controller.

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