公开(公告)号：WO2006124058A2

公开(公告)日：2006-11-23

申请号：PCT/US2005/039279

申请日：2005-10-31

Applicant: SIGMATEL, INC.

Inventor： MAY, Michael, R. ,  MAY, Marcus, W. ,  BAKER, David, C. ,  HENSON, Mathew, Brady

IPC: H04M1/00 ,  H04B1/38

CPC classification number: H04H40/45

Abstract: A handheld audio system includes a radio signal decoder integrated circuit (IC) and a digital audio processing integrated circuit. The radio signal decoder integrated circuit produces a digital left channel signal and a digital right channel signal from a received radio signal in accordance with an enable signal and also produces a system clock. The digital audio processing integrated circuit includes a DC-­to-DC converter and a processing module. The DC-to-DC converter is operably coupled to produce at least one power supply voltage based on the system clock. The processing module is operably coupled to produce the enable signal when the at least one power supply voltage has reached a desired level and to produce audio signals for audio playback from at least one of the digital left and right channel signals and a stored digital audio file.

Abstract translation: 手持音频系统包括无线电信号解码器集成电路（IC）和数字音频处理集成电路。 无线电信号解码器集成电路根据使能信号从接收的无线电信号产生数字左声道信号和数字右声道信号，并且还产生系统时钟。 数字音频处理集成电路包括DC-DC转换器和处理模块。 DC-DC转换器可操作地耦合以基于系统时钟产生至少一个电源电压。 当至少一个电源电压已经达到期望的水平并且从数字左声道信号和右声道信号中的至少一个产生用于音频回放的音频信号时，处理模块可操作地耦合以产生使能信号，并且存储数字音频文件 。