公开(公告)号：US20150324322A1

公开(公告)日：2015-11-12

申请号：US14804569

申请日：2015-07-21

Applicant: GN Netcom A/S

Inventor： Rene Elbaek Jensen

IPC: G06F13/42 ,  G06F13/10

CPC classification number: G06F13/4291 ,  G06F13/102 ,  G06F17/00 ,  H04L7/02 ,  H04L7/04

Abstract: A method of and a system for synchronizing isochronous audio data frames provided by a USB interface to a clock of a wireless RF communication device is provided. The USB interface and the wireless RF communication device are connected via an I2S link, the method comprising receiving the isochronous audio data frames and the wireless RF communication device clock in a streaming controller, phase locking the isochronous audio data frames to a USB interface clock, counting start-of-frame pulses of the phase locked isochronous audio data frames, comparing the counted start-of-frame pulses with the wireless RF communication device clock to determine a difference signal, the difference signal triggering a synchronization event code when a threshold difference has been reached, rate matching the isochronous audio data frames to the wireless RF communication device clock upon receiving the synchronization event code.

Abstract translation: 提供了一种用于将由USB接口提供的同步音频数据帧同步到无线RF通信设备的时钟的方法和系统。 USB接口和无线RF通信设备通过I2S链路连接，该方法包括在流控制器中接收同步音频数据帧和无线RF通信设备时钟，将同步音频数据帧锁定到USB接口时钟， 计数锁相同步音频数据帧的开始帧脉冲，将计数的开始帧脉冲与无线RF通信设备时钟进行比较以确定差分信号，当阈值差异 已经到达，在接收到同步事件代码时，将同步音频数据帧与无线RF通信设备时钟速率匹配。