公开(公告)号：US20120053709A1

公开(公告)日：2012-03-01

申请号：US12870619

申请日：2010-08-27

申请人： JANE ZHENG ,  Zhibing Liu ,  Jay Liang

发明人： JANE ZHENG ,  Zhibing Liu ,  Jay Liang

IPC分类号： G06F17/00

CPC分类号： H03L7/183

摘要： System and method for implementing a self-adjusting audio clock in an audio receiver comprising an audio data buffer for buffering data received from a transmitter are described. In one embodiment, the system includes an audio clock recovery circuit for recovering an audio clock signal from a reference clock signal received from the transmitter, wherein the audio clock is provided to the audio data buffer for use in reading data therefrom. The system further includes an adjustment circuit for providing an adjustment signal to the audio clock recovery circuit in accordance with a status of the audio data buffer. Responsive to the status of the audio data buffer indicating that the audio data buffer is approaching overflow, the adjustment signal provided to the audio clock recovery circuit causes an increase in the frequency of the audio clock signal. Responsive to the status of the audio data buffer indicating that the audio data buffer is approaching underflow, the adjustment signal provided to the audio clock recovery circuit causes a decrease in the frequency of the audio clock signal.

摘要翻译： 描述了一种在音频接收机中实现自调节音频时钟的系统和方法，包括用于缓冲从发射机接收的数据的音频数据缓冲器。 在一个实施例中，该系统包括音频时钟恢复电路，用于从从发射机接收的参考时钟信号中恢复音频时钟信号，其中音频时钟被提供给音频数据缓冲器，用于从其读取数据。 该系统还包括调整电路，用于根据音频数据缓冲器的状态向音频时钟恢复电路提供调整信号。 响应于指示音频数据缓冲器正在接近溢出的音频数据缓冲器的状态，提供给音频时钟恢复电路的调整信号导致音频时钟信号的频率的增加。 响应于指示音频数据缓冲器正在下溢的音频数据缓冲器的状态，提供给音频时钟恢复电路的调整信号导致音频时钟信号的频率的降低。