HADAMARD TRANSFORMATION PROCESSOR

摘要

A video player/reeorder receives video information on line 12 to be recorded on a disk 28 or reproduced from the disk 28 for display on a television set 46. Prior to recording, the information is compressed in compactor 20 and following reproduction, the information is decompressed in decompacter 35. The information is prepared for compression by means of an arithmetic unit 17 and is processed following decompression by the same unit 17. …The unit 17 performs a Hadamard transform on the video data and achieves the necessary high processing rate by means of two adders and two subtractors operating in parallel. A store 16 that holds the data during successive passes through the arithmetic unit 17 has accessing circuits and a set of registers and associated gates that fetch and store the data in a repetitive sequence that simplifles storage accessing. Data is processed in units that represent for example eight lines of a television picture and are supplied to an output buffer 41.