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SDI flywheel video decoder reference design

Posted: 24 Dec 2009     Print Version  Bookmark and Share

Keywords:digital interface serial  decoder video  reference design 

This application note describes the Serial Digital Interface (SDI) flywheel video decoder reference design based on the current Altera SDI MegaCore function. The SDI flywheel video decoder is used in video processors to handle real video signal streaming without noise or interruptions. The SDI flywheel video decoder synchronises its internally-generated video timing to the incoming video stream, and provides the horizontal and vertical timings to the other blocks in the video processor.

After synchronising, the SDI flywheel video decoder continuously compares its internal timing information with the input video stream. Whenever a difference occurs, the SDI flywheel video decoder does not immediately resynchronise with the input video stream, but instead, continues to generate video timing. The internal timing usually resumes in sync with the SDI flywheel video decoder if the input video stream contains only a few corrupted data words. If the video stream is switched to a different source or standard causing the synchronisation to go off, the SDI flywheel video decoder resynchronises with the incoming video stream.

The following sections describe the functional description, interface signals and steps to get started using the reference design.

View the PDF document for more information.

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