Abstract:
A method and an apparatus for generating a frame in DVB-H(Digital Video Broadcasting-Handheld) are provided to remove the necessity to repeat a packetizing process and a depacketizing process when generating frame data through arbitrary encoded packet data, thereby generating arbitrary frame data within a short time. UDP(User Datagram Protocol) data including at least one or more encoded RTP(Real time Transport Protocol) packet data is continuously received(501). An encoded AU(Access Unit) payload unit is extracted by depacketizing the RTP packet data and decoded(503). To configure one frame data, the AU payload unit is cumulated(505). If all AU payload units configuring the frame data are cumulated, the frame data is generated through the all AU payload units(507,509). After that, the generated frame data is outputted to a user(511).
Abstract:
A method for synchronizing an external program by using portable mobile broadcasting is provided to receive and execute an online game, and need a lot of communication resources, through the portable mobile broadcasting such as DMB(Digital Multimedia Broadcasting), thereby executing the online game with less communication resources. A method for synchronizing an external program by using portable mobile broadcasting comprises the following steps of: receiving server data, transmitted from a server, through a data channel of the portable mobile broadcasting(S504); storing the received server data(S506); and executing the external program by synchronizing the program with the stored server data(S510). If the portable mobile broadcasting is DMB(Digital Multimedia Broadcasting), the server data is received in an NPAD(Non Program Association Data) from through a data channel of the DMB.
Abstract:
A multi-screen display device for a digital broadcasting receiver and a method thereof are provided to display broadcasting data of a main service channel and at least one sub service channel selected by a user on a multi-screen of one display unit. A broadcasting receiving unit(110) receives burst data of a set main service channel and at least one sub service channel. A protocol processing unit(120) extracts video and audio data of the service channels. A decoding unit(130) includes a video decoder and an audio decoder. The video decoder performs the time division of a frame period per each frame and decodes video frame data of the main and sub service channels. The audio decoder decodes audio data of a predetermined service channel. A multi-screen processing unit(140) multiplexes and outputs the decoded video data of the main and sub service channels to be capable of being displayed on a multi-screen. A display unit(150) displays the video data outputted from the multi-screen processing unit(140) on the multi-screen. A speaker(155) reproduces the decoded audio data.
Abstract:
A method and a system for transmitting and receiving a notification message in a portable broadcasting system are provided to generate the notification message and transmit the generated notification message to a terminal which is receiving broadcasting. An NDAF(Notification Distribution/Adaptation Function)(103b) transmits control information including channel information of a notification message, and generates a notification message on the basis of the channel information. A BDS(Broadcast Distribution System) transmits the generated notification message to a mobile terminal(108). The mobile terminal(108) receives the control information transmitted from an interaction network(107), sets channel information about the notification message, and receives the notification message by using the channel information.
Abstract:
A method and an apparatus for managing a memory in a digital broadcasting receiver are provided to share a memory region required for coarse carrier recovery and data demodulation in a DVB-H(Digital Video Broadcasting-Handheld) receiver to reduce hardware of the receiver and increase an operating speed. A FFT(Fast Fourier Transform) unit fast-Fourier-transforms a received digital broadcasting signal(500). The FFT unit stores a fast-Fourier-transformed symbol required to acquire synchronization of a receiver in a memory(504). A coarse carrier recovery unit acquires synchronization by using the symbol stored in the memory(512). The FFT unit stores effective sub-carriers in the memory for channel estimation. A channel estimation/compensation unit estimates a channel by using the effective sub-carriers stored in the memory in order to demodulate data.
Abstract:
An apparatus and a method for detecting a mode in a digital broadcast reception system are provided to maintain a power saving effect by detecting an FFT(Fast Fourier Transform) mode and a GI(Guard Interval) mode and minimizing a synchronizing time. A mode detection apparatus of a digital broadcast reception system decodes a signal received by an OFDM(Orthogonal Frequency Division Multiplexing) transmission method into complex number signals and detects an FFT mode and a GI mode. A mode correlator performs the correlation calculation of the complex number signals and outputs the power level value of a received signal. A pulse generator compares the power level value received from the mode correlator with a threshold value set in advance and outputs a pulse signal. A mode detection part detects the pulse signal outputted from the pulse generator and detects the FFT mode and the GI mode.
Abstract:
본 발명은 텔레비전 방송 수신기에 관한 것으로서, 특히 차량용 지상파 디지털 텔레비전 방송 수신장치 및 방법에 관한 것으로, 안테나를 통해 디지털 방송신호를 수신하고, 소정의 제어를 받아 상기 디지털 방송신호로부터 소정의 채널에 대한 방송신호를 검출하고, 상기 방송신호로부터 비디오 신호와 오디오 신호를 분리하고, 상기 비디오 신호로부터 컴포지트 비디오 뱅킹 싱크 신호와 슈퍼 비디오 신호 및 제1비디오(601) 신호를 생성하고, 상기 오디오 신호로부터 스테레오 신호를 생성하여 출력하는 지상파 디지털 텔레비전 방송 모듈과, 상기 컴포지트 비디오 뱅킹 싱크 신호와 슈퍼 비디오 신호를 입력받고 제2슈퍼 비디오 신호를 생성하여 출력하는 변환기와, 상기 제1비디오(601) 신호와 제2비디오(601) 신호를 비교하여 더 우수한 신호에 대한 정보를 나타내는 비교기 신호를 출력하는 신호 비교기와, 상기 제1비디오(601) 신호와 제2비디오(601) 신호를 입력받고 소정의 제어를 받아 선택 출력하는 선택기와, 선택된 채널에 대한 채널 정보를 가지고, 상기 지상파 디지털 텔레비전 방송 모듈을 제어하며, 상기 비교기 신호를 입력받아 상기 선택기로 선택신호를 출력하는 마이컴으로 이루어진다. DVB-T, IDB-1394, 비디오(601) 신호
Abstract:
PURPOSE: A method of processing a non-real time(NRT) service and a broadcast receiver are provided to enable an NRT receiver to receive and process NRT service types and detailed and corresponding information of a service through a broadcast network. CONSTITUTION: A NRT receiver receives signaling information including NRT service information and access information that indicates files of a content item can be accessed by Internet. The NRT receiver receives FLUTE(File Delivery over Unidirectional Transport) files through a FLUTE session. An FDT(File Delivery Table) instance of the FLUTE session for each file belonging to the content item includes information for content location of the file. The information for content location includes an URL(Uniform Resource Locator). The NRT receiver provides an NRT service using the files belonging to the content item.
Abstract:
PURPOSE: A DVB-H test signal generating apparatus is provided to generate an I/Q modulation signal for broadcast by a test signal generating apparatus. CONSTITUTION: A modulation signal generating unit(100) generates an I/Q modulation for broadcast of a baseband from broadcasting source data. A control unit synchronizes output of the I/Q modulation signal with output of the I/Q modulation signal for broadcast. A first frequency offset generating unit(160) generates a first oscillation frequency. A first mixer(150) mixes the I/O modulation signal with the oscillation frequency.