Abstract:
본 발명은 하나의 증폭기에서 복수의 그룹들로 분할된 확성기로 구성된 구내방송시스템에서 어느 하나 이상의 확성기 선로가 단락되었을 경우 단락된 채널을 순차적으로 검색하지 않고서도 단락된 확성기 선로를 간단하면서도 신속하게 탐색할 수 있는 구내방송장치의 단락채널 검색 및 차단 시스템 및 그 방법에 관한 것이다.
Abstract:
본 발명은 CAN 통신을 이용한 전관 방송 장치에 관한 것으로서, CAN 버스 라인에 에러가 발생했는지 유무를 체크하여 CAN 통신을 복구하는 CAN 통신을 이용한 전관 방송 장치에 관한 것이다. 이를 위해 음원신호, 음성신호 및 미디어신호인 전관방송신호와 제어신호를 통신 프로토콜에 따라 전송하는 주 제어기, 및 주 제어기로부터 전관방송신호 및 제어신호를 입력받아 전관방송신호를 출력하도록 제어하는 부 제어기를 포함하며, 주 제어기 및 부 제어기는 CAN 통신에 의해 서로 데이터를 주고받도록 CAN 통신부를 구비하는 것을 특징으로 하는 CAN 통신을 이용한 전관 방송 장치가 개시된다.
Abstract:
Procédé de sécurisation de la diffusion numérique d'un contenu audiovisuel dans un réseau de diffusion numérique, ledit contenu étant généré par un équipement principal et/ou de secours d'une tête de réseau dudit réseau. Ledit procédé, mis en oeuvre au sein d'un dispositif de sécurisation de ladite tête de réseau, comprend: - une étape d'enregistrement (20) dudit contenu audiovisuel, au fur et à mesure de sa génération, et - une étape de fourniture (21), en vue de sa diffusion dans ledit réseau, d'une portion (Contenu 3) préalablement enregistrée dudit contenu audiovisuel lorsqu'une coupure, d'une durée supérieure à un seuil prédéterminé, de la génération par lesdits équipements principal et de secours est détectée par ledit dispositif de sécurisation.
Abstract:
La présente invention concerne un dispositif de réception d'un flux multiplexé spécifié par la norme DVB-SI comportant au moins un flux principal comportant une première table PAT identifiant au moins une première table PMT contenant au moins la liste des flux élémentaires d'un service audiovisuel en cours de diffusion et destiné à être reproduit en temps réel. Le dispositif détermine dans le contenu de la première table PMT un descripteur listant des identificateurs de flux élémentaires constituant un flux secondaire. Le flux secondaire transmet au moins un document audiovisuel en mode PUSH, sans contrainte temporelle. Le dispositif reçoit le document audiovisuel en utilisant les données incluses dans le descripteur et l'enregistre pour le reproduire plus tard. La présente invention concerne aussi le procédé de génération du flux multiplexé et les dispositifs aptes à mettre en œuvre le procédé.
Abstract:
The present invention relates to a converged broadcasting and communication system for schools, which is installed in a school to provide broadcasting and communication services. The system comprises: a broadcasting / communication convergence unit for multiplexing together broadcast and communication signals with optical signals of different wavelengths and then transmitting a converged broadcast-communication optical signal through an optical fiber; and a receiver for receiving the optical signal from the broadcast / communication convergence unit, demultiplexing the signal according to wavelength band, and then transmitting the separated broadcast and communication signals to a corresponding end terminal, wherein the receiver includes: a sensor part equipped with a temperature sensor for detecting an indoor temperature; and a receiving control part, which controls the processing of the signal transmitted from the broadcasting / communication convergence unit and receives a signal outputted from the temperature sensor of the sensor part to display the detected temperature on a display. With this converged broadcasting and communication system for schools, it is possible to integrate the broadcasting service and the communication service and facilitate monitoring of the classroom environment by detecting and providing information about classroom temperature, the presence of students and carbon concentration to an administration server, thereby increasing the device utility.
Abstract:
A system for detecting and locating a digital TV leakage signal in an HFC network (121). The system comprises a headend unit (102) and a leakage detector (119). The headend unit (102) receives the TV signal (202) at the headend (101) for use as a reference signal. The reference signal is sampled at a rate corresponding to a time reference signal, to produce reference signal samples. The samples and timestamp are transmitted to the leakage detector. The detector receives the digital TV signal (204) from a leakage source, for detection as a leakage signal. The detector (119) includes a cross-correlation processor (114). The leakage signal is sampled at a rate corresponding to the time reference signal, to produce leakage signal samples. The cross-correlation processor (114) performs a cross-correlation of the reference signal samples with the leakage signal samples to produce a cross-correlation function (207) having a peak, and the TV leakage signal is detected from this peak.
Abstract:
The quality of service in a digital television link (SME, LI, SMR) is surveyed cyclically by means of an analyzer (AM1 or AM2 or AM3) which analyzes the transport stream packets (TS) in order to determine a number of standardized analysis parameters which are complex to interpret. The invention minimizes the number of measurements of these parameters by selecting first and second analysis parameters in advance and periodically determining a first maximum for variations from the first selected parameters and the second maximum for variations from the second parameters selected in order to determine, respectively, a first parameter (SS) which is representative of the synchronization relative to the equipment in the link and at least one second parameter (TS; FD) which is representative of a degradation in a link.
Abstract:
Error sampling broadcast data is disclosed. One embodiment includes a system. The system includes a main station, a plurality of receivers, and one or more sampling stations. The main station broadcasts information to one or more predetermined regions. The plurality of receivers are in each of the predetermined regions and receive the information broadcasted. The one or more sampling stations are within the predetermined regions and receive the same information broadcasted by the main station and then convey information regarding reception back to the main station.