发明名称 |
A SYSTEM AND METHOD FOR ADAPTING TRANSMISSION RATE OF A MULTIMEDIA STREAMING SERVER USING A VIRTUAL CLOCK |
摘要 |
A so-called "Virtual Clock" with varying frequency is provided for used by a multimedia streaming server to adapt its transmission rate dynamically to changing network conditions. The "Virtual Clock" system and method of the present invention compensates for a potential limitation of the Internet Real-time Transmission Protocol (RTP), that stamps every packet it delivers with a timestamp and expects the server using this timestamp to schedule the transmission of this particular packet accordingly. Consequently, the transmission rate is pre-determined by the encoded multimedia content when RPT is used. Using the "Virtual Clock" of the present invention, the streaming server has a mechanism to overcome this RTP limitation and can conduct transmission rate adaptation in a way that can balance the bandwidth requirement of the content with the bandwidth availability of the network.
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申请公布号 |
KR20050085549(A) |
申请公布日期 |
2005.08.29 |
申请号 |
KR20057010610 |
申请日期 |
2005.06.10 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
LI QIONG;VAN DER SCHAAR MIHAELA |
分类号 |
H04L12/56;H04L29/06;(IPC1-7):H04L12/56;H04L12/28 |
主分类号 |
H04L12/56 |
代理机构 |
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