| 摘要 |
A method for synchronizing multiple digital signals is disclosed herein which synchronizes samples of audio information generated by independent digital audio sources to a single master sampling clock reference. An interpolation filter associated with each independent digital audio source determines an interpolated audio sample based on audio samples from the associated digital audio source and based on a ratio between the master sampling rate and the sampling rate of the associated digital audio source. This ratio is derived from averaging a code indicating the number of samples received from an associated one of the independent digital audio sources during each master sampling clock period. The interpolation filter for each of the independent digital audio sources uses this ratio in combination with the audio samples to output an interpolated sample at each master sampling clock reference signal. Using this method, any number of independent digital audio sources may have their outputs interpolated with the above-described interpolation filter, and the interpolation filters will output interpolated samples which are synchronous with one another. |
