Abstract:
PURPOSE: A signal reception apparatus including a digital front end and signal reception method using the same are provided to variably control decimation rates according to the channel band or frequency bandwidth of a signal at the digital front end by inputting a channel selecting filter. CONSTITUTION: A CIC(Cascated Integrator Comb) decimation filter(110) reduces sampling rates of a reception signal. A CIC compensation filter(120) compensates errors generated in the CIC decimation filter. A re-sampler(130) controls the sampling rates of the reception signal. A channel selecting filter(140) rapidly filters a channel frequency band. The channel selecting filter eliminates noise except for signal bands.
Abstract:
PURPOSE: A digital reception apparatus for mobile communication and operation method thereof are provided to support multi-mode sampling by using integer and rational decimation. CONSTITUTION: An ADC(Analog-to-Digital Converter) changes an RF(Radio Frequency) analog signal into a digital signal. A digital front end(140) includes a filter(220) and a digital mixer(210). The digital mixer changes the center frequency of the output signal of the ADC into DC(Direct Current). The filter satisfies with signals of multiple bands through a digital AGC(Auto Gain Control). A modem modulates the output signal of a digital front end.
Abstract:
본 발명은 멀티 앵글 디지털 방송 서비스 제공 방법에 관한 것으로, 다수의 카메라로 촬영된 좌우 스테레오 영상을 포함하는 3차원 입체 영상 형태의 촬영 영상을 입력받는 단계; 상기 입력된 촬영 영상들을 멀티 앵글 디지털 방송 서비스로 제공하기 위한 전송 스트림 형태로 인코딩하는 단계; 및 상기 인코딩된 전송 스트림을 단말 장치로 전송하는 단계;를 포함하는 것을 특징으로 하는 멀티 앵글 방송 서비스 제공 방법에 의해 보다 생동감 있는 방송 서비스의 제공이 가능하고 IPTV 에서도 멀티 앵글 서비스를 구현할 수 있게 된다.
Abstract:
PURPOSE: A channel sever, a channel prediction server, a terminal and method for a fast channel change system based on multiplicity multicast with program rating prediction are provided to predict a channel to be changed based on a program rating. CONSTITUTION: Based on channel preference information, a streaming module(111) applies delay values to an original multicast stream. The streaming module generates at least one delay multicast stream. An analysis module(112) receives query information on the original multicast stream from a terminal. The analysis module receives the query information on the original multicast stream, and determines the optimized multicast stream among the delay multicast streams. The analysis module transfers the response information related to the optimized multicasts stream to a terminal(140).
Abstract:
PURPOSE: A telephone order processing server, a gateway, and a broadcasting terminal for a digital TV advertisement are provided to efficiently identify the data advertisement by using an advertisement exposure information corresponding to advertisement data transmitted to the broadcasting terminal. CONSTITUTION: A call processor(1121) receives an order request from a terminal of an orderer. A detector(1122) detects advertisement exposure information related to the orderer. A synchronizer(1123) distinguishes a first advertisement data related to the order based on the advertisement exposure information. A order processing unit(1124) processes an order procedure about the first advertisement data.
Abstract:
PURPOSE: A method for measuring a network available bandwidth in high speed and a device for measuring transmission delay tendency are provided to make measurement traffic not interfere an original media by using a duplicated packet of the original media as a measuring traffic. CONSTITUTION: A transmitting party transmits a media to a receiving party(510). The receiving party collects time interval between the packets of the transmitted media(520). The receiving party inspects one-way delay related to the packet based on the collected time interval(530). The receiving party reports the inspected one-way delay to the transmitting party(540). The transmitting party controls a bit rate of the media based on the reported one-way delay(550).
Abstract:
본 발명은 오버레이 멀티캐스트 트리 구성 방법 및 전송 트리 관리 장치에 관한 것으로, 상기 에이전트의 동작 모드를 파악하는 단계; 및 상기 파악된 동작 모드에 기초하여 오버레이 정책을 결정하고, 상기 결정된 정책에 따라 상기 에이전트들의 전송 트리를 구성하는 트리 구성 단계;를 포함하는 것을 특징으로 하는 전송 트리 구성 방법에 의해 해당 응용에 최적화된 전송 트리를 구성할 수 있다.