Dual memory buffer scheme for providing multiple data streams from stored data

Abstract From the Canadian patent

Successive frames of data are processed to provide a plurality of data streams containing the data in different orders. In an illustrated embodiment, two different data streams are output for incoming frames of video data. Pixels are grouped from an incoming current video frame to provide successive pairs thereof for storage in a first memory bank at a first clock rate .PHI.. Stored pixel pairs are read from a second memory bank containing a previous video frame at a second clock rate 2.PHI. while the pairs of pixels from the current video frame are being stored in the first memory bank at rate .PHI.. This provides two pairs of pixels from the previous video frame for each one pair of …