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1. 发明申请

US20090185695A1 METHOD AND SYSTEM FOR CLOCK DRIFT COMPENSATION 有权
标题翻译：时钟补偿的方法和系统
公开(公告)号：US20090185695A1
公开(公告)日：2009-07-23
申请号：US12338719
申请日：2008-12-18
申请人： Trygve Frederik MARTON , Torgeir Grothe LIEN
发明人： Trygve Frederik MARTON , Torgeir Grothe LIEN
IPC分类号： H04B3/20
CPC分类号： H04M9/082
摘要： Different sampling rates between a playout unit and a capture unit are compensated for via a system, method and computer program product. The playout unit receives samples from a computational unit, and the capture unit sends samples to the computational unit. A playout FIFO buffer operates in a playout time domain, and a capture FIFO buffer operates in a capture time domain. The computational unit is synchronized to a common clock. A first relationship is calculated between the common clock and a playout fifo buffer read pointer, and a second relationship is calculated between the common clock and a capture FIFO buffer write pointer. For each sample in the playout time domain a corresponding sample in the samples from said computational unit is found and sent to the playout FIFO buffer. For each sample in the common clock time domain the corresponding sample in the capture time domain is found and sent to the computational unit.
摘要翻译：通过系统，方法和计算机程序产品补偿播出单元和捕获单元之间的不同采样率。播放单元从计算单元接收样本，并且捕获单元将样本发送到计算单元。播放FIFO缓冲器在播放时域中操作，并且捕获FIFO缓冲器在捕获时域中操作。计算单元与公共时钟同步。在公共时钟和播出fifo缓冲区读指针之间计算第一关系，并且在公共时钟和捕获FIFO缓冲器写指针之间计算第二关系。对于播放时域中的每个样本，找到来自所述计算单元的样本中的对应样本并发送到播放FIFO缓冲器。对于公共时钟时域中的每个采样，捕获时域中的相应采样被发现并发送到计算单元。

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