Auravision Corporation

Miles S Simpson

Scott A Kimura

Steven S Chan

Steven L Gibson

The bandwidth capability of a full-motion video buffer is prevented from being exceeded by automatically controlling the horizontal scaling of the incoming video data and the horizontal zooming or expansion of the outgoing display data to force the bandwidth of the video data to virtually match the bandwidth capability of the video buffer. In one embodiment, this automatic control of the horizontal scaling and zooming is performed in a dynamic fashion where a detector detects the dropping of any video bits caused by the bandwidth of the incoming video data exceeding the bandwidth capability of the video buffer. Upon detection of these dropped bits, the horizontal scaling of the incoming video data is incrementally reduced (and the horizontal zooming is proportionally increased) until the bandwidth of the incoming video data is at or below the maximum bandwidth capability of the memory buffer. In this way, the video buffer cannot be overdriven and no video data is lost. This technique also applies to processing non-video data.

Data processing technique for limiting the bandwidth of data to be

A multimedia video processor chip for a personal computer in employs a multi-port central cache memory to queue all the incoming data to be stored in a DRAM and all the outgoing data being retrieved from the DRAM. Such a cache memory is used in one of several modes in which the cache memory is partitioned by cache boundaries into different groups of storage areas. Each storage area of the cache is dedicated to storing data from a specific data source. The cache boundaries are chosen such that, for a given mode, the storage areas are optimized for worst case conditions for all data streams.

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San Jose, CA, United States of America

Miles S Simpson