本文提出一种基于实时硬件抽象层RTHAL的方法增强μCLinux实时性能以便应用于实时视频编码系统。具有硬实时性能的RTHAL运行于硬件层和μCLinux之间，通过尽可能少地修改μCLinux内核而获得完全的硬实时性能，平均任务调度延迟仅为3～4μs左右。本文还提出了如何计算和设置RTHAL和μCLinux之间FIFO缓冲区的大小以便实现实时数据稳定传输的方法。通过实时视频编码实例测试表明，该方法能够简单高效地提高μCLinux的实时性能。

The paper proposes an implementation of the realtime μCLinux based on RTHAL(Real Time Hardware Abstract Layer). RTHAL with hard realtimeness runs between hardware and μCLinux,and only with a few modifications μCLinux can have harder realtimeness with a scheduling delay of about 3μs. The paper further proposes an effective method to calculate the size of the FIFO buffer for transferring realtime data stably between RTHAL and μCLinux. An example of realtime video coding proves the method can provide μCLinux with good realtimeness easily and effectively.