KR20070068015A - Dmb terminal unit and peripheral for the same - Google Patents

Abstract

A DMB(Digital Multimedia Broadcasting) receiving terminal and a peripheral device are provided to use both the functions of H.264 encoder and H.264 decoder and smoothly interface the DMB receiving terminal with an external device having no H.264 codec function. A DMB receiving terminal includes a data storage unit(300), a DMB receiver(110) for receiving a DMB signal, demodulating the received DMB signal and temporarily storing the demodulated DMB signal in the data storage unit, an external data input unit(200), a serial communication interface(400), an H.264 encoder(210) for encoding external data inputted through the external data input unit or data provided by the data storage unit according to H.264 encoding method, and an H.264 file generator(220) for receiving THE data encoded by the H.264 encoder and generating a file according to H.264 codec mode. The DMB receiving terminal further includes an H.264 decoder(120) for receiving the DMB signal stored in the data storage unit and decoding the DMB signal according to H.264 decoding method, a moving picture output unit(130) for displaying the signal decoded by the H.264 decoder, an operating unit(500) through which a user inputs a request signal, and a controller(600) for controlling input/output of data through the DMB receiver, the external data input unit, the serial communication interface, and the moving picture output unit according to the request signal and controlling the operations of the H.264 encoder and the H.264 decoder.

Description

Digital multimedia broadcasting receiving terminal and peripheral device according thereto {DMB terminal unit and peripheral for the same}

1 is an exemplary configuration diagram of a digital multimedia broadcasting receiving terminal according to the present invention.

2 is an exemplary view for explaining a signal flow between a digital multimedia broadcasting receiving terminal and a peripheral device according to the present invention;

The present invention relates to a digital multimedia broadcasting receiving terminal. In particular, when using a codec according to the H.264 standard, both the functions of an H.264 encoder and a decoder can be used for a smooth interface with an external device having no H.264 codec. A digital multimedia broadcasting receiving terminal.

In general, with the recent increase in the research on the wireless Internet, the mobility of portable digital devices, such as laptops, laptop computers, PDAs, etc. has attracted attention, and gradually occupy the market of desktop computers. In addition, display performance, which has been pointed out as a limitation of notebooks in the past, is gradually improving, and portable digital devices are no longer inferior to desktop computers in expressing multimedia information. Therefore, the combination of portable digital devices and multimedia technologies has become an important issue in the portable digital device market.

In addition, the interest in digital broadcasting has recently increased, and studies on the practical use of digital multimedia broadcasting (DMB) and digital audio broadcasting (DAB) have been continued.

The Korea Broadcasting Commission announced that in February 2003, the Comprehensive Plan for Digital Broadcasting, including Digital Media Center (DMC), Data Broadcasting and DMB, will allow DMB to be equipped with CD-level sound quality and data or video services. It is defined as 'Digital Multimedia Broadcasting that provides reception quality', and DMB is classified into terrestrial DMB and satellite DMB according to transmission means such as terrestrial and satellite.

Meanwhile, SK Telecom defined DMB as 'next-generation broadcasting that provides CD-quality high-quality voice and data service capable of mobile reception' in a document called 'Satellite DMB Status and Service Forecast' released in January 2003. The important attributes of DMB that can be inferred from the definitions of various institutions and companies about DMB are 'multichannel', 'multimedia' and 'mobility'.

In order to introduce such a DMB system, the premise that a small size and real-time processing of the image should be possible and the quality should be very excellent. The proposed technique is H.264 / MPEG-4 Advanced Video Coding (AVC). (Hereinafter referred to as H.264) Codec technology according to the standard.

The conventional DMB terminal according to the H.264 standard faithfully provides a function of reproducing the received broadcast signal. Actually, the display of the DMB terminal is provided to the user of the DMB terminal because the screen is small for the convenience of mobility. The disadvantage is that it can only provide a small screen.

Therefore, when the external display function of a large screen using another peripheral device is to be performed, it is difficult to maintain the image quality of the original image unless the corresponding external device has a decoder function of the H.264 codec.

In addition, although the decoder and encoder can perform both functions due to the characteristics of the codec, the conventional DMB terminal has only a broadcast reception function using only a decoder function of the H.264 codec. It does not provide the ability to use the advantages of the H.264 codec's Encoder function (eg high efficiency data compression technology).

An object of the present invention for solving the above-mentioned problems relates to a digital multimedia broadcasting receiving terminal, and in particular, an external device without the H.264 codec function while using both the functions of the encoder and the decoder when using the codec according to the H.264 standard. The present invention provides a digital multimedia broadcasting receiving terminal for a smooth interface with a.

A feature of the digital multimedia broadcasting receiver terminal according to the present invention for achieving the above object is a data storage means for temporary storage of data for data conversion and signal processing or storage of completed data; A DMB broadcast receiving unit for receiving satellite or terrestrial DMB broadcasts through a broadcast receiving antenna and demodulating the broadcasts and temporarily storing them in the data storage means; An external data input unit for receiving any external data requested by the user; A serial communication interface for transmitting and receiving serial data according to any communication scheme; An H.264 encoder unit for encoding an external data input through the external data input unit or data provided by the data storage unit according to an H.264 codec method; An H.264 file generation unit which receives data according to an encoding operation of the H.264 encoder unit and collects data to generate a file according to an actual H.264 codec method; An H.264 decoder which receives the DMB broadcast signal stored in the data storage means and performs decoding according to the H.264 codec method; A video output unit for displaying data decoded through the H.264 decoder; An operation unit for receiving a user's request signal; And controlling input and output of data through the DMB broadcasting receiver, the external data input unit, the serial communication interface unit, and the video output unit according to a user request signal input through the operation unit, and operate the H.264 encoder unit and the H.264 decoder unit. It includes a control unit for controlling.

As an additional feature of the digital multimedia broadcasting receiving terminal according to the present invention for achieving the above object, the serial communication interface unit uses a wired or wireless communication method.

As another additional feature of the digital multimedia broadcasting receiving terminal according to the present invention for achieving the above object, the external data input unit is input according to the capture ratio and sampling rate of the video / audio wave data set by the user It is to deliver the received natural video frame and audio PCM converted data to H.264 encoder unit (audio codec is BASC, AAC + SBR, etc.).

As another additional feature of the digital multimedia broadcasting receiving terminal according to the present invention for achieving the above object, the H.264 encoder unit is a video / audio wave that is not compressed at all from the external data input unit (Wave) Compressed or uncompressed natural video and audio data, which are read from a low data or a file in a data storage means, are compressed into a specific unit of H.264 bit string according to the quality requirements setting environment value. After that, the coded bit string is stuffed whenever the size of the bit string increases by a specific unit, and is transmitted to the H.264 file generator.

As another additional feature of the digital multimedia broadcasting receiving terminal according to the present invention for achieving the above object, the data storage means is a buffer for data sequential processing and dedicated memory and local storage media (HDD, SSD, etc.) It is configured.

As another additional feature of the digital multimedia broadcasting receiving terminal according to the present invention for achieving the above object, the serial communication interface unit receives compressed or uncompressed data (video / audio) received by wireless or wired communication. The packetized stream is stored in the transmission queue of the data storage means, the packet stream stored in the transmission queue is delivered, and the received data is received in the form of a packet stream. It is stored in the receiving buffer of the storage means and unpacketized in the form of output data through reassembly through the sequence number of the packet.

Features of the peripheral device for digital multimedia broadcasting receiving terminal according to the present invention for achieving the above object, the data storage means for the temporary storage of data for data conversion and signal processing or the storage of completed data; A DMB broadcast receiving unit for receiving satellite or terrestrial DMB broadcasts through a broadcast receiving antenna and demodulating the broadcasts and temporarily storing them in the data storage means; An external data input unit for receiving any external data requested by the user; A serial communication interface for transmitting and receiving serial data according to any communication scheme; An H.264 encoder unit for encoding an external data input through the external data input unit or data provided by the data storage unit according to an H.264 codec method; An H.264 file generation unit which receives data according to an encoding operation of the H.264 encoder unit and collects data to generate a file according to an actual H.264 codec method; An H.264 decoder which receives the DMB broadcast signal stored in the data storage means and performs decoding according to the H.264 codec method; A video output unit for displaying data decoded through the H.264 decoder; An operation unit for receiving a user's request signal; And controlling input and output of data through the DMB broadcasting receiver, the external data input unit, the serial communication interface unit, and the video output unit according to a user request signal input through the operation unit, and operate the H.264 encoder unit and the H.264 decoder unit. A digital multimedia broadcasting receiver terminal and an external device for data transmission and reception, comprising: an external device serial communication interface unit for data communication corresponding to a serial communication interface unit of the digital multimedia broadcasting receiver terminal; A serial H.264 file generation unit generating H.264 file data of a serial type by merging the H.264 file data received through the external device serial communication interface unit; External device data storage means for data processing and storage; And a serial H.264 viewer for receiving the serial H.264 file stored through the external device data storage means through the external device serial communication interface and displaying the serial H.264 file.

The above object and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

First, referring to the technical background applied to the present invention, a codec refers to a technology capable of compressing or reproducing an image or an audio. H.264 codec technology, a next-generation codec technology, is a next-generation multi-video codec technology capable of compressing 15 times more than MPEG2 and 10 times more than MPEG4 used in DVD systems.

In fact, by utilizing the H.264 codec technology, one DVD movie (movie file) of 1.4 gigabytes (GB) can be compressed to 140 megabytes (MB), which is equivalent to one-tenth the size, without any change in image quality and sound quality. This will allow you to store five DVD-quality movies on one 700MB CD.

The video compression standard is standardized on both axes of ITU-T and ISO / IEC. Among them, ITU-T recommendation is mainly designed for real-time video communication such as video-conference or video-telephony. The MPEG-X (MPEG-1, MPEG-2 and MPEG-4) standard, adopted by ISO / IEC, is mostly designed for storage, broadcast or streaming (video over Internet, video over Wireless). Because of the different orientations, the two groups are moving forward with independent and different standardizations, with the exception of exceptional standardizations such as H.262 / MPEG-2 in most standardizations.

H.264 / MPEG-4 AVC (Advanced Video Coding) (hereinafter referred to as H.264) is a new video compression standard that is obtained through the standardization process of ITU-T and ISO / IEC in this background. It is a new standard with significant performance improvements that can be applied to the area (DVD, digital cinema, low bit rate wireless applications, etc.).

H.264 provides significantly greater compression efficiency compared to the compression algorithms used in the past with its added features and functionality. Additional features include quarter-sample motion prediction accuracy, seven motion compensation modes, various reference frames, efficient entropy encoding, and predictive intra encoding, resulting in high picture quality at low bandwidths.

H.264 video compression allows users to experience improved picture quality at the same bandwidth, or at the same rate at half the speed of conventional bandwidth. For example, users familiar with 768Kbps high definition can now have the same effect on 384Kbps bandwidth.

H.264 also shows improved performance in case of network errors. In other words, even when there is a loss of image data due to a network error, the image is not completely disconnected but only a decrease in image quality. For example, if you compare MPEG-2 with the quality of H.264, H.264 requires only 70Kbits per second, while MPEG-2 requires 150Kbits per second for the same picture quality.

The profile structure of H.264-a combination of compression techniques-has been simplified. There were more than one million possible combinations in H.263, but other vendor-to-vendor implementations would only use the default mode. H.264 handles three profiles: basic, main and extended. The basic profile provides powerful error recovery tools and low latency coding, making it ideal for video conferencing applications, especially for dynamic networks such as the Internet, for transmitting video conferencing data at low bandwidths. Main and extended profiles will be used for broadcast video such as broadcast TV and DVD.

From a technical point of view, H.261, MPEC-2, MPEC-4 part 2 (formerly MPEG-4), H.263 and H.264 are all block motion compensation and variant-based codecs.

According to the evaluation of engineers involved in the standardization and implementation process, the data compression rate of H.264 is twice or three times that of MPEG-2 used in current DVD system and 1.5 ~ 2 times higher than MPEG-4. With H.264 technology, the same picture quality as a DVD can be obtained at a coding rate of about 2Mbps, and at 1Mbps, the same picture quality as a home VCR can be obtained. Regardless of the type of test video, reducing the coding rate by almost half did not change the picture quality.In some cases, 6Mbps was required for MPEG-2 encoding to achieve high picture quality, but H.264 achieved the same picture quality at 1.5Mbps. I was able to.

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

1 is a diagram illustrating a configuration of a digital multimedia broadcasting receiving terminal according to the present invention, which receives a satellite or terrestrial DMB broadcasting through a broadcasting receiving antenna 100 and demodulates the corresponding broadcasting, and Wired or wireless communication with an external data input unit 200 for receiving arbitrary external data requested by a user, a memory 300 for temporary storage of data for data conversion and signal processing or storage of completed data Serial communication interface 400 for transmitting and receiving serial data according to the method, and external data input through the external data input unit 200 or data provided from the memory 300 according to the H.264 codec method The H.264 encoder 210 performs an encoding operation, and receives data corresponding to the encoding (encoding) operation of the H.264 encoder 210. H.264 file generation unit 220 to generate a file according to the actual H.264 codec method and the DMB broadcast signal received and demodulated through the DMB broadcasting receiver 110 receives the H.264 codec H.264 decoder 120 performing a decoding (decoding) operation according to the scheme, a video output unit 130 for displaying data decoded through the H.264 decoder 120, and a user's request signal The DMB broadcast receiving unit 110, the external data input unit 200, the serial communication interface 400 and the video output unit according to the control unit 500 for receiving the input, and the user request signal input through the operation unit 500 The control unit 600 controls input / output of data through the 130 and controls operations of the H.264 encoder 210 and the H.264 decoder 120.

Looking at the operation features of the configuration of the main part of the configuration in detail, the external data input unit 200 is a capture rate (eg 30 frames per second) and sampling rate of the video / audio wave data set by the user ( For example, a natural video frame and audio PCM-converted data input according to 8 kHz are transmitted to the H.264 encoder unit 210 (audio codec is BASC, AAC + SBR, etc.).

In addition, the H.264 encoder 210 receives low data of a video / audio wave that is not compressed at all from the external data input unit 200 (eg, broadcast data, analog / digital). Video signal, etc.) or natural video (e.g., luminance component Y and chrominance components UV in RGB) of uncompressed or compressed data (for example, MPEG-2 video data) read from a file in the memory unit 300 (also referred to as CbCr). ) And audio data are compressed into H.264 bit strings in a specific unit (e.g., bytes) according to the quality request setting environment value (encoding: compressor) (BASC, AAC + SBR in case of audio). After the compressed bit stream is increased by a specific unit (for example, 1 byte), the encoded bit stream is stuffed and merged through the H.264 file generation unit 220. One file (e.g. ***. M) P4) is stored in a dedicated memory of the memory 300, and then a local storage medium of the memory unit 300 by a file system according to an operating system (OS) of the controller 600. : HDD, SSD).

In addition, the H.264 decoder 120 reads data stored in the memory 300 or is stored in the memory 300 by wired / wireless serial communication through the serial communication interface 400. After receiving the data and parsing the video / audio packet stream, it is divided into H.264 audio stream and H.264 video stream, and then H.264 audio decompressor (eg BASC, AAC + SBR, etc.) And the H.264 video decompressor is restored (decoded) and stored in a buffer of the memory 300, and the result is performed by the video output unit 130 or serial for video rendering. It is sent to the outside through the communication interface 400.

The serial communication interface 400 streams compressed or uncompressed data (video / audio) received by wireless or wired communication into a packet form and stores the data in a transmission queue of the memory unit 300. Deliver the packet stream stored in the transmission queue.

In addition, the data received in the form of a packet stream is stored in a receiving buffer of the memory unit 300 (for example, 50 bytes in size of 2000 bytes, that is, 1 Mbytes in maximum) and is output through reassembly through the sequence number of the packet. Unpacketize the data.

In addition, the digital multimedia broadcasting receiving terminal according to the present invention is known to be about DSP 400 Digital Signal Processing (DSP) although the clock speed required for purely executing the H.264 codec may vary. The H.264 encoder (encoder) of the present invention has a DSP function of high clock speed (e.g. 400 MHz) and an embedded CPU (e.g. ARM9) function in order to be able to perform complex computational processing of the H.264 codec. (Eg ARM Module and DSP Module are On-Chip).

Referring to Figure 2 attached to the operation of the digital multimedia broadcasting receiving terminal according to the present invention configured as described above, the satellite / terrestrial DMB composite terminal of the present invention is a DMB broadcast signal received from the conventional broadcast receiving antenna (100) (Multimedia services such as audio, video, and various interactive contents that are independent or interlocked with the broadcast program) are CDM demodulated in DAB modem (MODEM) via RF tuner of DMB broadcasting receiver 110, and then error correction and decryption It is converted into a port stream packet (MPEG-2 TS (Transport Stream): a transport stream specified by the MPEG system standard (ISO / IEC 13818-1)).

At this time, the packet of MPEG-2 TS (Transport Stream) is composed of two groups (Payload data 188 byte and Parity data 16 Byte including TS header containing Sync byte). The TS packet header has a Sync Byte value as the first byte value.

This Sync Byte value (for example, '0x47') is a value that arranges the input serial stream data, so it can be used as a synchronization signal when processing, storing, and reading data. .

For example, the signal sent from the DAB MODEM to the output may be TS_CLK, TS_SYNC, TS Data, etc. One of them, the TS_SYNC signal, may be generated in synchronization with a sync byte of '0x47'.

After descrambling the TS, the TS (Elementary Stream: encoded video, audio, independent data, etc.) by a PID (Packet Identifier) packet and a Section filter are processed. After filtering (dividing) into basic streams, the TS (Transport Stream) decoder is processed in the form of a packetized elementary stream (PES) packet having a same stream ID. As a result, the video, audio, and other data are separated and converted into word units in synchronization with Sync Byte in the TS packet and stored in the buffer memory of the memory 300.

Thereafter, the control unit 500, for example, an image constituting the H.264 decoder unit 120 in the buffer memory of the memory 300 according to a start-up instruction by a control device including a remote-controlled device. It is provided to the content decoder and the audio content decoder.

In this case, the video stream (video, still image, character figure) is a moving image (eg QVGA, 320x240x16 bits, YCbCr (4: 2: 2), 4: 3 ratio, MPEG-4), still image (eg : Same as moving picture resolution, JPEG), character figure (e.g. QVGA, 320x240x8 bit, PNG (Portable Network Graphics)] are decoded separately and then buffered and combined in each plane display memory of memory 300, then video output It is displayed through the unit 130.

On the other hand, audio streams (eg, MPEG-2 AAC Elementary Stream format, sampling frequencies of 48 kHz, 32 kHz, 24 kHz, 16 kHz and 16 bit encoded voice) are decoded by the audio content decoder and then output through the volume output device.

Accordingly, the received DMB broadcast signal (multimedia service such as audio, video, and various interactive contents, which are independent or interlocked with the broadcast program) may be connected to the DMB broadcast receiver 110, the H.264 decoder 120, and the memory 300. After being output to the video output unit 130 to listen to the DMB broadcast.

This is the same as the operation of the existing DMB terminal.

Referring to the configuration of an external device for data compatibility with the digital multimedia broadcasting receiving terminal according to the present invention in FIG. 2 briefly, the serial communication interface unit for data communication with the digital multimedia broadcasting receiving terminal according to the present invention ( 710 and a serial H.264 file generation unit 730 for generating H.264 files of serial type by merging the H.264 file data received through the serial communication interface unit 710; The memory 720 for data processing and the serial H.264 file temporarily stored through the memory 720 are received through the serial communication interface 710 and displayed on the display 740. It consists of a serial H.264 viewer 730.

At this time, the serial H.264 viewer 730 is executed by the operating system (Operating System) and performs the function of showing the video stream data file browsed by the user in the form of sound and video, that is, video.

That is, the external listening route of the overall DMB broadcast is formed by adding only a configuration for simple data compatibility without providing a separate H.264 codec processing means to the external device.

When an external signal is input at the request of the user through the operation unit 500, an external video device [camcorder, DVD, digital camera, other cameras (eg, PC cameras, CCTV cameras, etc.) through the external data input unit 200] The external video and audio are input from the H.264 encoder 210 and compressed by the H.264 decoder 120 in the reverse order of the operation, which is performed by the H.264 file generator 220. It is stored in.

In this case, the signal compressed by the H.264 encoder 210 may be provided to an external device through the serial communication interface 400.

External devices include general personal computers (eg, desktop PCs, notebook PCs) or portable embedded / non-embedded computer terminals (PDAs, smartphones, PMPs, tablet PCs, mobile PCs, etc.).

In addition, the serial communication interfaces 400 and 710 may use USB or IEEE 1394, UWB, Bluetooth, Koinonia, wireless LAN, portable Internet, etc. as the wired / wireless communication, and the external device may use the serial communication interface 710. Serial H.264 video file generator 730 for generating H.264 compressed video and audio data transmitted through the file to the device itself.

Therefore, the moving image content (e.g. DVD movie, camera output video, real-time scene data of video and audio by the preview function of the camcorder which is optical zoom, etc.) of the external large data can be stored in the memory 720 of the external device (eg : HDD, SSD (Solid State Disk, etc.)] can be stored in the form of a file, or the created serial H.264 video file can be moved or copied to the outside.

On the contrary, it is also possible to reproduce data in the terminal by providing data from the external device to the terminal according to the present invention.

The advantage of having serial communication interfaces 400 and 710 is that the H.264 codec has a complex computational process [P (Pentium) 4 (IV) 3.2GHz, which requires up to two CPUs of multiplier and division. Structured processing process], the conventional external device compresses the input image from the outside into high quality (e.g. VGA-class 15 frames or more) by H.264 codec with only its computational performance of 1.2GHz of Pentium 3. Function, or decompression and simultaneous decompression, and also when you want to play a serial H.264 video file on the external device (e.g. 15 or more frames per second VGA) Since it is difficult to convert the serial H.264 video file stored in the memory device to the serial communication interface method to transfer to the H.264 decoder function in the satellite / terrestrial DMB composite terminal of the present invention It is transmitted back to the external device through the serial communication interfaces 400 and 710 in the coded (decompressed) data format so that it can be viewed on the display device through the serial H.264 video viewer or the serial H.264 video external output ( Example: RGB output, S-video, component, NTSC / PAL output, etc., or through the input terminal (ex: RGB terminal) of an external display device (e.g. TFT-LCD monitor). do.

While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who owns it can easily find out.

When providing a digital multimedia broadcasting receiving terminal according to the present invention as described above, when using the codec according to the H.264 standard, both the function of the encoder and the decoder can be used, but the interface with the external device without the H.264 codec function Can be done.

Claims (7)

Data storage means for temporarily storing data for data conversion and signal processing or for storing completed data; A DMB broadcast receiving unit for receiving satellite or terrestrial DMB broadcasts through a broadcast receiving antenna and demodulating the broadcasts and temporarily storing them in the data storage means; An external data input unit for receiving any external data requested by the user; A serial communication interface for transmitting and receiving serial data according to any communication scheme; An H.264 encoder unit for encoding an external data input through the external data input unit or data provided by the data storage unit according to an H.264 codec method; An H.264 file generation unit which receives data according to an encoding operation of the H.264 encoder unit and collects data to generate a file according to an actual H.264 codec method; An H.264 decoder which receives the DMB broadcast signal stored in the data storage means and performs decoding according to the H.264 codec method; A video output unit for displaying data decoded through the H.264 decoder; An operation unit for receiving a user's request signal; And Controls input and output of data through the DMB broadcasting receiver, external data input unit, serial communication interface unit, and video output unit according to a user request signal input through the operation unit, and controls operations of the H.264 encoder unit and the H.264 decoder unit. Digital multimedia broadcasting receiving terminal comprising a control unit. The method of claim 1, The serial communication interface unit digital multimedia broadcasting receiving terminal, characterized in that using a wired or wireless communication method. The method of claim 1, The external data input unit H.264 encoder (audio codec is BASC, AAC +) for inputting natural video frame and audio PCM converted data according to the capture rate and sampling rate of video / audio wave data set by the user. SBR, etc.) digital multimedia broadcasting receiving terminal characterized in that the transmission. The method of claim 1, In the H.264 encoder unit, natural data of compressed or uncompressed data read from a file in a data storage unit or low data of a video / audio wave that is not compressed at all is input from the external data input unit. After compressing the video and audio data into H.264 bit strings of a specific unit according to a quality request setting environment value, the encoded bit stream is stuffed whenever the size of the bit string increases by a specific unit. Digital multimedia broadcasting receiving terminal characterized in that the transfer to the H.264 file generation unit. The method of claim 1, The data storage means is a digital multimedia broadcasting receiving terminal comprising a buffer for data sequential processing, a dedicated memory and a local storage medium (HDD, SSD, etc.). The method according to claim 1 or 2, The serial communication interface unit converts compressed or uncompressed data (video / audio) received by wireless or wired communication into a packet form, stores the data in a transmission queue of the data storage means, and stores the packet stream stored in the transmission queue. Deliver Packet Stream, and store received data in the form of packet stream in the receiving buffer of the data storage means and restore the output data by reassembling through the sequence number of the packet. (Unpacketization) Digital multimedia broadcasting receiving terminal characterized in that. Data storage means for temporarily storing data for data conversion and signal processing or for storing completed data; A DMB broadcast receiving unit for receiving satellite or terrestrial DMB broadcasts through a broadcast receiving antenna and demodulating the broadcasts and temporarily storing them in the data storage means; An external data input unit for receiving any external data requested by the user; A serial communication interface for transmitting and receiving serial data according to any communication scheme; An H.264 encoder unit for encoding an external data input through the external data input unit or data provided by the data storage unit according to an H.264 codec method; An H.264 file generation unit which receives data according to an encoding operation of the H.264 encoder unit and collects data to generate a file according to an actual H.264 codec method; An H.264 decoder which receives the DMB broadcast signal stored in the data storage means and performs decoding according to the H.264 codec method; A video output unit for displaying data decoded through the H.264 decoder; An operation unit for receiving a user's request signal; And controlling input and output of data through the DMB broadcasting receiver, the external data input unit, the serial communication interface unit, and the video output unit according to a user request signal input through the operation unit, and operate the H.264 encoder unit and the H.264 decoder unit. In the digital multimedia broadcasting receiving terminal including a control unit for controlling and an external device for transmitting and receiving data: An external device serial communication interface unit for data communication corresponding to the serial communication interface unit of the digital multimedia broadcasting receiving terminal; A serial H.264 file generation unit generating H.264 file data of a serial type by merging the H.264 file data received through the external device serial communication interface unit; External device data storage means for data processing and storage; And And a serial H.264 viewer for receiving a serial H.264 file stored through the external device data storage means through the external device serial communication interface and displaying the same through a display unit. Peripheral device.

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