In this paper a video processing architecture for use in a set top box (STB) compatible with the Brazilian Digital Television System (SBTVD) is presented. After the decoding process, a video frame is stored in the STB memory and is scanned by the output subsystem while executing several operations in order to fit the external display. The paper discusses design and implementation issues for several modules like video scaler, video captioning and also the generation of video outputs signals (VGA or composite PAL-M). Implementation results using a FPGA-based hardware platform are also provided. The goal is to go to silicon implementation after the FPGA validation phase.
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