发明名称 |
COMPATIBLE TRANSMISSION AND RECEPTION OF OPERATIONAL SIGNALS TO BE PROCESSED BY A RECEIVER |
摘要 |
<p>There exists a problem of backwards compatibility and future proofness of data transmission systems and, more particularly, interactive television broadcast transmissions. In view hereof, service providers must take into account that their service is to be processed by receivers having different capabilities. To this end, operational signals for different receiver types are identified by respective level data (operation-level) defining which receiver capabilities are required to perform the operation. Two operation levels (full-operation-level and minimum-operation-level) are sufficient. More levels can be defined by means of chaining techniques. In a practical embodiment, a plurality of operations is packed in a transmission block. Events (e.g., user actions) are represented by an index to the list, the index depending on whether the receiver has full or minimal capabilities.</p> |
申请公布号 |
EP0928542(B1) |
申请公布日期 |
2005.09.14 |
申请号 |
EP19980922995 |
申请日期 |
1998.06.11 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;PHILIPS AB |
发明人 |
VAN GESTEL, HENRICUS, ANTONIUS, WILHELMUS |
分类号 |
H04N21/236;H04B1/16;H04H20/81;H04N5/38;H04N5/445;H04N7/08;H04N7/088;H04N7/173;H04N21/2362;(IPC1-7):H04N7/24 |
主分类号 |
H04N21/236 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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