Television image format non-linear conversion device

Television – Format conversion – Conversion between standards with different aspect ratios

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348441, 348704, H04N 701

Patent

active

059430982

ABSTRACT:
The present invention relates to a device for converting a television image format including two memories for storing image lines, alternatively switched in the read and write mode, and a control circuit issuing to these memories a first write frequency and a second read frequency, the control circuit including programmable means for generating said frequencies controlled by a horizontal synchronization signal, the read frequency being programmed to follow a predefined variation law having a period corresponding to the duration of one scanning line.

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patent: 4868656 (1989-09-01), Geiger
patent: 4920407 (1990-04-01), Stoddard
patent: 5343256 (1994-08-01), Kimura et al.
patent: 5673086 (1997-09-01), Fukuoka et al.
French Search Report from French Patent Application 96 11682, filed Sep. 20, 1996.
Patent Abstracts of Japan, vol. 95, No. 6, Jul. 31, 1995 & JP-A-07 067046 (NEC).
Patent Abstracts of Japan, vol. 95, No. 6, Jul. 31, 1995 & JP-A-07 067045 (Mitsubishi Electric).
Patent Abstracts of Japan, vol. 96, No. 3, Mar. 29, 1996 & JP-A-07 298086 (Toshiba).

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