Abstract:
1. 청구범위에 기재된 발명이 속하는 기술분야 본 발명은 디지털 멀티미디어 방송 전송 스트림 분석 장치 및 그 방법과, 상기 방법을 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체에 관한 것임. 2. 발명이 해결하려고 하는 기술적 과제 본 발명은 멀티미디어 방송 서비스를 위해서 MPEG-4로 부호화하고 MPEG-2 시스템을 이용한 ETI 프레임이 정상적으로 구성되어 있는지를 검증할 수 있는 DMB 전송 스트림 분석 장치 및 그 방법과, 상기 방법을 실현시키기 위한 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체를 제공하고자 함. 3. 발명의 해결 방법의 요지 본 발명은, 멀티미디어 데이터를 가지는 앙상블전송접속(ETI) 프레임을 분석하여, ETI 프레임 분석정보를 바탕으로 상기 ETI 프레임에서 엠펙2(MPEG-2) 스트림을 추출하여 전송 스트림 패킷 단위로 구성하는 제 1 단계; 상기 MPEG-2 스트림을 분석하여, MPEG-2 스트림 분석정보를 바탕으로 엠펙4(MPEG-4) IOD 정보를 추출하고, MPEG-4 OD/BIFS 패킷, MPEG-4 오디오 및/또는 비디오 패킷을 구성하는 제 2 단계; 및 상기 MPEG-4 IOD 정보를 바탕으로 MPEG-4 OD/BIFS 패킷, MPEG-4 오디오 및/또는 비디오 패킷을 분석하는 제 3 단계를 포함함. 4. 발명의 중요한 용도 본 발명은 디지털 멀티미디어 방송(DMB) 서비스 등에 이용됨.
Abstract:
An apparatus and a method for inserting a multimedia stream for providing a multimedia broadcast service in a DAB(Digital Audio Broadcasting) transmission system are provided to reliably provide a multimedia service through a compact terminal in movement by using a Eureka 147-based DAB transmission system which is resistant to a transmission error. An ETI(Ensemble Transport Interface) frame receiving unit(300) receives an ETI frame, namely, a DAB transport frame. An ETI frame analyzing unit(301) analyzes configuration information of the ETI frame. An ETI frame buffering unit(302) temporarily stores the ETI frame for its re-configuration. An MPEG-2 stream receiving unit(303) receives an MPEG-2 stream with multimedia data. An MPEG-2 stream analyzing unit(304) calculates a transmission rate of the received MPEG-2 stream and detects a state of the inputted stream. An outer coding unit(305) performs outer coding so as to be resistant to a transmission error. An MPEG-2 stream buffering unit(306) temporarily stores the outer coded MPEG-2 stream in order to insert it in the ETI frame. An ETI frame reconstitution unit(307) reads data from the ETI frame buffering unit(302) and from the MPEG-2 stream buffering unit(306) and reconstitutes the ETI frame. A controller(308) controls re-configuring of the ETI frame. An ETI stream buffering unit(309) transmits the reconstituted DAB transmission frame. An ETI frame transmitting unit(310) transmits the ETI frame at a physical level.
Abstract:
PURPOSE: A media stream transforming apparatus and method for providing multimedia service in a DAB(Digital Audio Broadcasting) transmission system are provided to apply MPEG-2 system based multimedia data to the DAB transmission system to provide multimedia broadcasting service including moving pictures. CONSTITUTION: A media stream transforming apparatus includes a media transport stream receiver(201) for receiving a media transport stream, a media transport stream analyzer(202) for calculating a transfer rate of the media transport stream and analyzes the state of the stream, and a system manager(205) through which a system manager inputs/outputs control information using a graphic user interface. The apparatus further includes a system controller(206) for receiving control signals from the media transport stream analyzer and the system manager to transmit the control signals to a DAB transmission system, a media transport stream storage unit(203) for temporarily storing the media transport stream output from the media transport stream analyzer, and an ETI(Ensemble Transport Interface) frame manager(207) for controlling the media transport stream storage unit and processing the control signals from the system controller. The apparatus also has an ETI frame construction unit(204) for constructing an ETI frame using the media transport stream of the media transport stream storage unit, and an ETI transmitter(208) for transmitting the ETI frame to a physical level.
Abstract:
Disclosed is an apparatus and method for processing transport streams (TSs) and a delay-controlling apparatus that assigns a predetermined delay to MPEG-2 TS packets fed into a POD module in a digital cable broadcasting system, irrespective of a time delay caused by descrambling scrambled input TS packets, the apparatus including: a demultiplexer for receiving TSs and dividing them into scrambled and non-scrambled data; a descrambler controller for receiving the scrambled data from the demultiplexer and descrambling it; a delay controller for receiving the non-scrambled data from the demultiplexer and the descrambled data from the descrambler controller and delaying them by a predetermined time; and a remultiplexer for receiving the data from the delay controller, multiplexing them, and outputting the multiplexed data in the TS format.
Abstract:
PURPOSE: A device for converting contents and a method thereof are provided to use contents manufactured adapted to a specific standard in a digital broadcasting system which is adapted to other standard. CONSTITUTION: A demultiplexing unit(10) demultiplexes an inputted digital broadcasting stream(BS1) and classifies the digital broadcasting stream(BS1) into a video stream(VS1), an audio stream(OS1), a broadcasting protocol stream(PS1), and a data stream(DS1). A conversion unit(20) converts each classified and inputted stream adapted to a standard to be broadcasted. A multiplexing unit(30) multiplexes each converted stream and a corresponding broadcasting protocol stream. A protocol server(40) supplies the broadcasting protocol stream corresponded to the broadcasting standard to the multiplexing unit(30). Because the video stream(VS1) is used as the same standard in each broadcasting stream, the audio stream(OS1), the broadcasting protocol stream(PS1), and the data stream(DS1) are converted only.
Abstract:
PURPOSE: A program and system information protocol(PSIP) converting apparatus and method and a digital cable television broadcasting system using the PSIP converting apparatus are provided to convert PSIP of ground-wave broadcast and SI protocol of satellite broadcast into PSIP in cable broadcasting format in real time. CONSTITUTION: A PSIP converting apparatus includes a protocol data extraction unit(202), a protocol data conversion unit(203), a protocol data insertion unit(204), and a system controller(207). The protocol data extraction unit demultiplexes a digital ground-wave broadcast transport stream or satellite broadcast transport stream to extract A/V data and PSIP/PSI from the ground-wave broadcast transport stream and to extract A/V data and SI/PSI data from the satellite broadcast transport stream. The protocol data conversion unit generates PSIP/PSI data in a digital cable TV broadcast format, corresponding to the extracted PSIP/PSI data or SI/PSI data. The protocol data insertion unit inserts the PSIP/PSI data in the digital cable TV broadcast format into the extracted A/V data to generate a digital cable broadcast transport stream. The system controller controls the operations of the units.
Abstract:
PURPOSE: An apparatus and a method for controlling reception of multi-data using a single port and a multi-data transmission system are provided to receive both of transmission signals in two modes using only one port. CONSTITUTION: An apparatus for controlling reception of multi-data using a single port includes the first and second standard signal receivers(20,30), a switch(10), and a controller(40). The first standard signal receiver processes an input signal according to the first broadcasting standard. The second standard signal receiver processes an input signal according to the second broadcasting standard different from the first broadcasting standard. The switch selects one of the first and second standard signal receivers to transmit a signal inputted through the single port. The controller receives the signals processed by the first and second standard signal receivers and judges the broadcasting standards of the signals to generate control signals according to the judged broadcasting standards and outputs the control signals to the switch.