Video player and/or recorder with hadamard transform

Details Video player and/or recorder with hadamard transform Video player and/or recorder with hadamard transform

H - Electricity

04

N

352/32.2

H04N 5/781 (2006.01) G06F 17/14 (2006.01) H04N 5/926 (2006.01) H04N 5/85 (2006.01)

Patent

CA 1133129

VIDEO PLAYER AND/OR RECORDED WITH HADAMARD TRANSFORM ABSTRACT An apparatus for performing a Hadamard transform on video data for compression of data to be recorded and decompression of data read from a record for dis- play achieves the necessary high rate by means of two or more adders and two subtractors operating in para- llel. A store that holds the data during successive passes through an arithmetic unit has accessing cir- cuits and a set of registers and associated gates that fetch and store the data in a repetitive sequence that simplifies storage accessing. Data is processed in units that represent for example eight lines of a television picture and an output buffer is provided for the decompressor of a video disk player that receives data as it is processed and holds previously processed data unit by a storage accessing circuit that minimizes the amount of buffer storage that must be provided in the player. PO9-77-029

339629

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