发明名称 |
Video signal processing apparatus with means for magnifying and processing a picture image correspondingly to video signals |
摘要 |
The present invention relates to a video signal processing apparatus for converting video signals based on a desired transmission system such as NTSC, PAL, MUSE or any other system so as to conform to a display unit of a desired screen system such as XGA, VGA or the like. The apparatus has a feature that it is provided with a PLL circuit for changing a sampling frequency used by an analog-to-digital converter for converting inputted video signals into digital signals in accordance with the sort of the transmission system of the video signals, and a controller for controlling picture element interpolation of the digital signals performed by a picture image magnifying circuit for magnifying the video signals horizontally and vertically, in accordance with the sort of the transmission system of the video signals.
|
申请公布号 |
US5953075(A) |
申请公布日期 |
1999.09.14 |
申请号 |
US19970900512 |
申请日期 |
1997.07.25 |
申请人 |
HITACHI, LTD.;HITACHI VIDEO AND INFORMATION SYSTEM, INC. |
发明人 |
NAGATA, TATSUO;MATONO, TAKAAKI;SAKAI, TAKESHI;HASEGAWA, RYO;SUDO, KOICHI |
分类号 |
G06F3/147;G09G3/20;G09G5/00;H04N5/44;H04N7/01;(IPC1-7):H04N9/74;H04N3/223 |
主分类号 |
G06F3/147 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|