Television signal conversion system and image encoding and decod

Details Television signal conversion system and image encoding and decod Television signal conversion system and image encoding and decod

1996-05-23

1999-04-06

Tung, Bryan

Television

Format conversion

Involving both line number and field rate conversion

348452, H04N 701

Patent

active

058925503

ABSTRACT:
In this invention, the duplicate field included in a telecine signal that is produced from a movie film or the like by 2-3 pull down system is detected without failure, and completely removed before being encoded or transmitted. The result of the accumulation of the duplicate field in the telecine signal is regarded as an amount of noise resulting from the conversion of a film into the telecine signal. Then, a threshold is used as a reference for detecting the duplicate field and changed in accordance with the noise. In addition, a memory is provided to store the location of the duplicate field in the telecine signal, thus making it possible to surely eliminate the duplicate field at the same location even when the same video signal is received again.

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Eiji Iwasaki, et al; "A Study on Preprocessing of MPEG2 Video Coding for Telecine Source"; Jul. 26, 1995; ITE '95, 1995 ITE Annual Convention; pp. 129-130.

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