发明名称 |
BLOCK NOISE DETECTOR AND BLOCK NOISE ELIMINATOR |
摘要 |
<p>A vertical HPF 11 and a horizontal HPF 12 receive a video signal 101, and extract only a high frequency component in the vertical/horizontal directions, respectively. Absolute value taking parts 13 and 14 take an absolute value thereof and change the value to a positive value. A horizontal accumulating/adding part 15 and a vertical accumulating/adding part 16 accumulate/add an input signal so as to output a vertical one-dimensional signal and a horizontal one-dimensional signal each periodically having a peak value in the vertical and horizontal directions. A horizontal peak detecting part 18 detects a horizontal peak position according to the horizontal one-dimensional signal. A vertical peak detecting part 17 detects a vertical peak position according to the vertical one-dimensional signal and identifies a format thereof. A binarization part 19 obtains a block boundary image, according to the horizontal peak position and the vertical peak position, in which pixel positions having a peak is provided with 1 and remaining pixel positions are provided with 0. In this manner, even if a block boundary to eliminate block noise thereon is not clearly identified, it becomes possible to correctly detect and eliminate the block boundary.</p> |
申请公布号 |
EP0998146(A4) |
申请公布日期 |
2001.02.28 |
申请号 |
EP19990919649 |
申请日期 |
1999.05.18 |
申请人 |
MATSUSHITA ELECTRONICS CORPORATION |
发明人 |
NIO, YUTAKA;OKAMOTO, SATOSHI;TERAI, KATSUMI;OKUMURA, NAOJI;TANAKA, KAZUHITO |
分类号 |
G06T9/00;H04N7/26;(IPC1-7):H04N7/24;H04N7/30 |
主分类号 |
G06T9/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|