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Encoding of Closed Caption in a Video Using Matlab

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CLOSED CAPTION Decoder presents the integration of several IPs to produce a system-on-chip (SoC) for digital television STB compliant to the SBTVD standard. The digital television (DTV) transport stream is planned to accommodate NTSC &DTV caption services DTVCC. The project report describes how services are inserted into and transported within the bit stream and the challenges that must be overcome in order to provide properly format and corresponding captioning. These service transmission starts at the caption encoding head end feeding the DTV encoder and ends at the decoding hardware in the DTV receiver. Obstacle to be overcome include ensure system integration, minimize codec latency and maintain synchronization. Consciousness of these concerns is essential for engineers and management in the digital video industry. Besides, those systems are built from heterogeneous processing units designed to perform specific tasks in order to maximize the on the whole system efficiency.
Keywords: ATSC, CEA-708, DTVCC, Line 21, PSIP


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