The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 1997
Filed:
Oct. 20, 1995
Susumu Tsuchida, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A display apparatus wherein a video signal of a child picture read out at a double speed is inserted accurately with a high resolution into a parent picture of another video signal having a double frequency. Control signals for designating a write area and a read-out area of a four field sequence memory provided for forming a double speed field frequency is formed in accordance with odd/even number field discrimination signals for write and read-out video signals, a vertical synchronizing signal prior to double speed conversion and a double speed synchronizing signal for a parent picture so that, even when the parent picture is scrolled, passing of the read-out side memory area does not take place. Where the parent picture is formed from a video signal of the interlace system by a line double speed, the double speed child picture video signal is delayed, upon reading out in an even-numbered field, by one horizontal scanning period so that lines may be overlapped between the parent and child pictures.