发明申请
US20060143678A1 System and process for controlling the coding bit rate of streaming media data employing a linear quadratic control technique and leaky bucket model
审中-公开
使用线性二次控制技术和漏斗模型来控制流媒体数据的编码比特率的系统和过程
- 专利标题： System and process for controlling the coding bit rate of streaming media data employing a linear quadratic control technique and leaky bucket model
- 专利标题（中）： 使用线性二次控制技术和漏斗模型来控制流媒体数据的编码比特率的系统和过程
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申请号： US11010114申请日： 2004-12-10
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公开(公告)号： US20060143678A1公开(公告)日： 2006-06-29
- 发明人: Philip Chou , Anders Klemets , Cheng Huang
- 申请人： Philip Chou , Anders Klemets , Cheng Huang
- 申请人地址： US WA Redmond
- 专利权人： Microsoft Corporation
- 当前专利权人： Microsoft Corporation
- 当前专利权人地址： US WA Redmond
- 主分类号： H04N7/173
- IPC分类号： H04N7/173
摘要：
A system and process for controlling the coding bit rate of streaming media data is presented. This coding bit rate control involves dynamically adjusting the coding bit rate to control client buffer duration to prevent the buffer from underflowing, while keeping the average coding bit rate close to the average transmission bit rate of the network (an thus maximizing the quality of the data playback). Using the theory of optimal linear quadratic control, the client buffer duration is kept as close as possible to a target level while still keeping the coding bit rate (and hence the quality) as constant as possible. In addition, a leaky bucket model is incorporated into the control loop so that the changes in buffer duration due to natural variation in the instantaneous coding bit rate are not mistaken for changes in buffer duration due to network congestion.