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

1978-12-28

1980-07-01

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

360 32, 360 9, H04N 579

Patent

active

042109310

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 display achieves the necessary high rate by means of two or more adders and two subtractors operating in parallel. A store that holds the data during successive passes through an arithmetic unit has accessing circuits 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.

REFERENCES:
patent: 3976826 (1976-08-01), Fulton, Jr.
patent: 4001564 (1977-01-01), Bied-Charreton et al.
patent: 4048658 (1977-09-01), Nakagawa
patent: 4134134 (1979-01-01), Lux

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