发明名称 |
Television transmission system using transmission of basic picture weighting factors. |
摘要 |
<p>In a television transmission system for digital picture signals each picture is partitioned into sub-pictures of N1xN2 pixels for limiting the bit rate. Each sub-picture is subjected to a forward picture transform for generating basic picture weighting factors. To this end each sub-picture is multiplied by a reference picture which has different values for different pixels (for example, as described by a Gauss function). This multiplied sub-picture is subsequently multiplied by a number of kernel pictures so that the said basic picture weighting factors are obtained. Each kernel picture is equal to the product of the reference picture and a basic picture. Of the collection of basic pictures each basic picture is an orthogonal polynomial associated with the square value of the reference picture. For regaining the original sub-pictures each weighting factor is multiplied by the original kernel picture from which the weighting factor is obtained. Each weighting factor of a sub-picture thus supplies an auxiliary sub-picture. Summation of all auxiliary sub-pictures yields a replica of the original sub-picture.</p> |
申请公布号 |
EP0340853(A1) |
申请公布日期 |
1989.11.08 |
申请号 |
EP19890201088 |
申请日期 |
1989.04.27 |
申请人 |
N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
MARTENS, JEAN BERNARD OSKAR SUZANNA |
分类号 |
H04N7/26;H04N7/30 |
主分类号 |
H04N7/26 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|