公开(公告)号：EP2235928A1

公开(公告)日：2010-10-06

申请号：EP08862488.7

申请日：2008-12-16

申请人： Tandberg Telecom AS

发明人： MARTON, Trygve, Fredrik ,  LIEN, Torgeir, Grothe

IPC分类号： H04M9/08

CPC分类号： H04M9/082

摘要： Different sampling rates between a playout unit and a capture unit are compensated for. 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： 补偿播出单元和捕获单元之间的不同采样率。 播出单元从计算单元接收采样，并且捕获单元将采样发送到计算单元。 播出FIFO缓冲器在播出时间域中操作，并且捕获FIFO缓冲器在捕获时域中操作。 计算单元被同步到一个公共时钟。 计算公共时钟和播出FIFO缓冲器读指针之间的第一关系，并计算公共时钟和捕获FIFO缓冲器写指针之间的第二关系。 对于播出时域中的每个样本，找到来自所述计算单元的样本中的对应样本并将其发送到播出FIFO缓冲区。 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被发送到计算单元。