Abstract:
PURPOSE: A transmitting method of digital broadcasting signal, a transmitting apparatus, a receiving method, a receiving apparatus and a transmission frame structure thereof are provided to support various transmission modes in digital satellite broadcasting. CONSTITUTION: A digital broadcasting signal transmitting device includes a stream offering unit, a multiplexer, and a transmission frame generating unit. The stream offer unit changes the program service configuration element of a plurality of into a stream. The multiplexer falsifies in the mode of being a stream determined according to the transmission mode. The transmission frame maker produces a transfer frame(10) in the multiplexed information according to the transmission mode and each sub channel based on the stream information. The transfer frame includes a frame header(20) and a frame body(30). The frame header includes the multiplexed information of the transfer frame.
Abstract:
본 발명은 채널 프로파일의 분리 및 감쇄 현상을 보상하기 위한 식별신호 분석 장치 및 그 방법에 관한 것으로, 상관 값 보상 기법을 이용하여 기존의 식별신호 분석 장치에서 발생한 채널 프로파일이 분리되거나 감쇄되는 현상을 보상하기 위한, 식별신호 분석 장치 및 그 방법을 제공하고자 한다. 이를 위하여, 본 발명은 식별신호를 분석하기 위한 식별신호 분석 장치에 있어서, 송신 측 기기에 의해 삽입된 식별신호와 동일한 식별신호를 생성하기 위한 식별신호 생성수단; 상기 송신측 기기에 의해 약속된 식별번호가 삽입되어 수신된 수신신호와 상기 식별신호 생성수단에 의해 생성된 식별신호와의 상관 값을 부분상관 기법을 통해 계산하기 위한 부분상관수단; 상기 부분상관수단에 의해 계산된 상관 값의 분리 및 감쇄 현상을 보상하기 위한 상관 값 보상수단; 및 상기 상관 값 보상 수단에 의해 보상된 상관 값으로부터 채널 프로파일(channel profile)을 추출하기 위한 채널 프로파일 추출수단을 포함한다. 식별신호 분석, 약속된 식별신호 삽입, 동일 식별신호 생성, 부분상관, 가중 덧셈, 상관 값 보상
Abstract:
An apparatus and a method for rendering a depth based image in mobile broadcasting are provided to apply a discontinuous maintenance filter to a depth image, thereby minimizing distortion of the depth image. A discontinuous maintenance filter(111) smoothes a depth image correspondingly to gradient amplitude of the depth image. An adaptive smoothing filter(115) calculates a gradient degree of the depth image transmitted from the discontinuous maintenance filter. Only when gradient amplitude is larger than a preset value, the adaptive smoothing filter applies a filter feature according to a gradient direction to the depth image. The adaptive smoothing filter transmits the depth image to an encoding module(120). The encoding module transmits a reference image and the depth image.
Abstract:
커맨드라인 인터페이스 구현 방법이 개시된다. 커맨드라인 인터페이스 구현 방법은 헤드엔드 케이블 모뎀 맥 관리 서브 모듈이 운용자로부터 헤드엔드 케이블 모뎀의 상태 정보를 요청하는 콘솔 명령을 입력 받아 장치관리 메시지를 생성하는 단계, 헤드엔드 케이블 모뎀 맥 제어 서브 모듈이 상기 장치관리 메시지를 수신하는 단계, 상기 헤드엔드 케이블 모뎀 맥 제어 서브 모듈이 상기 헤드엔드 케이블 모뎀의 맥 모듈로부터 상기 상태 정보를 수신하는 단계 및 상기 헤드엔드 케이블 모뎀 맥 관리 서브 모듈이 상기 헤드엔드 케이블 모뎀 맥 제어 서브 모듈로부터 상기 상태 정보를 전달 받아 콘솔 출력을 생성하는 단계를 포함한다. 커맨드라인 인터페이스(command line interface), 헤드엔드(headend), 케이블 모뎀(cable modem), 매체접근제어(MAC), 채널 결합(channel bonding), 하향 채널
Abstract:
신호 수신 장치는 복수의 안테나를 통해 복수의 신호를 수신하고, 복수의 신호로부터 제1 계층 추정 심볼열 및 복수의 제2 계층 추정 심볼열을 생성하며, 복수의 제2 계층 추정 심볼열에 가중치를 적용하여 복수의 가중치 적용 심볼열을 생성한다. 이후 복수의 가중치 적용 심볼열에 대해 덧셈 연산을 수행하여 다이버시티 신호를 생성하고, 제1 계층 추정 심볼열을 바탕으로 제1 계층 신호를 생성하며, 다이버시티 신호를 바탕으로 제2 계층 신호를 생성한다. 이를 통해 새로 추가되는 신호의 수신율을 높일 수 있다. 방송, 계층 변조, 다이버시티, OFDM
Abstract:
A 3D(Dimensional) contents scene playback method and a device thereof are provided to support 3D text through a scene descriptor by suggesting a 3D text node including text information and disparity information of the text information to the scene descriptor. An MPEG(Moving Picture Expert Group)-4 control signal generator generates an MPEG-4 control signal including a scene descriptor. The scene descriptor includes 3D text node information for displaying text in 3D. The 3D text node information includes a left string field storing a first text corresponding to a left staring point, a right string field storing a second text corresponding to a right starting point, and a disparity field storing information for disparity of the first and second text.
Abstract:
An on channel repeater and a method thereof are provided to compensate for channel distortion occurring between a main transmitter and a repeater, thereby transmitting an output signal of high quality which is similar to a transmitting signal of the main transmitter the most through the on channel. The first subtraction unit(903) subtracts a feedback signal and a replica of a multi path signal from a signal of receiving units(901,902). A replica generating unit(913) generates each filter coefficient in a pilot section and a data section. The replica generating unit generates the feedback signal and the replica of the multi path signal by using the generated filter coefficient. Transmitting units(911,912) transmit an output signal from the first subtraction unit.
Abstract:
A method and an apparatus for detecting a downloadable conditional access system host with duplicated secure micro are provided to efficiently determine whether an SM is duplicated using authentication time difference information associated with a value of a difference between a time when a host is finally authenticated in a first address and a time when the host is authenticated in a second address. A head-end system(110) includes an AP(Authentication Proxy) server(111), an LKS(Local Key Server)(112), a DPS(Downloadable Conditional Access System Provisioning Server)(113), and an IPS(Integrated Personalization System) server(114). The head-end system is installed separately from an existing CAS(Conditional Access System) server(140). Also, the head-end system is operated independently from the CAS server, and thus is compatible with an existing cable broadcasting system. The LKS stores and manages information about keys of servers such as a key of an SM(Secure Micro), a history of ID(IDentification) information of the SM, a key of the AP server, a history of ID information of the AP server, and history of key information of the IPS server. Also, the DPS manages download-related information and policy associated with a DCAS service. The IPS server stores and manages an SM client to be downloaded to a DCAS host(160). When the DCAS host connected to a cable network exists, the AP server transmits information associated with an SM of the DCAS host to a TA(Trusted Authority)(120) to authenticate the DCAS host. The TA is a reliable external authentication device. The TA authenticates the DCAS host using the received information associated with the SM.
Abstract:
A signal transmission method and a signal receiving method in a broadcasting system are provided to mutually link services of two ensemble transfer frames, thereby offering a high-quality data service. An ensemble of a base layer and the ensemble of an enhancement layer are produced from data content of a broadcast signal. A base layer ensemble processor(130) comprises a base layer service component. The enhancement layer ensemble comprises an enhancement layer service component. Ensemble transfer frames of the basic layer and the enhancement layer are individually generated from the ensemble of the base layer and the ensemble of the enhancement layer. The ensemble transfer frames of the enhancement layer and the base layer are transmitted. The ensemble transfer frame of the enhancement layer comprises service control information.
Abstract:
A relay apparatus and a relay method thereof are provided to increase the power of a signal re-transmitted through a transmission antenna by removing a feedback signal from a signal received through a receiving antenna. A receiver(100) frequency-down-converts an RF receiving signal to an IF(Intermediate Frequency) signal. An echo remover(200) removes a feedback signal from an IF receiving signal. A demodulator(300) demodulates a T-DMB frame in the IF signal where the feedback signal is removed, and then extracts/outputs a phase reference symbol to an equalizer. The equalizer updates the coefficient of a filter to compensate for the distortion of the IF signal.