发明名称 |
Reconstitution of program streams split across multiple program identifiers |
摘要 |
A method and apparatus for reconstituting packetized data streams representing a television program when the program uses multiple packet identifiers (PID) as in selective encryption schemes. Transmission of multiple sets of system information (SI) is avoided by incorporating a lookup table within a private data packet. A dual buffer arrangement in the set-top box provides ease of reconstitution of a data stream by generation of an interrupt upon receipt of a packet with a shadow PID. The buffers are toggled as a result of the interrupt and a corresponding packet can be found either at the beginning of the newly active buffer or the end of the inactive buffer. The stream of packets representing a program can then be reconstituted by creation of a new packet having the primary PID and shadow packet's payload. |
申请公布号 |
US2002194613(A1) |
申请公布日期 |
2002.12.19 |
申请号 |
US20020084106 |
申请日期 |
2002.02.27 |
申请人 |
UNGER ROBERT ALLAN |
发明人 |
UNGER ROBERT ALLAN |
分类号 |
H04N7/16;H04N7/167;(IPC1-7):H04N7/173 |
主分类号 |
H04N7/16 |
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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