Method and system for handling the processing of bluetooth data during multi-path multi-rate audio processing

摘要

An audio codec in a baseband processor may be utilized for mixing audio signals received at a plurality of data sampling rates. The mixed audio signals may be up sampled to a very large sampling rate, and then down sampled to a specified sampling rate that is compatible with a Bluetooth-enabled device by utilizing an interpolator in the audio codec. The down-sampled signals may be communicated to Bluetooth-enabled devices, such as Bluetooth headsets, or Bluetooth-enabled devices with a USB interface. The interpolator may be a linear interpolator for which the audio codec may enable generation of triggering and/or coefficient signals based on the specified output sampling rate. An interpolation coefficient may be generated based on a base value associated with the specified output sampling rate. The audio codec may enable selecting the specified output sampling rate from a plurality of rates.

主权项

1. A method for signal processing, the method comprising:
mixing audio signals in an audio codec integrated within a baseband processor in a wireless device to provide a mixed audio signal, wherein said audio signals are received in said audio codec at a plurality of data sampling rates; up-sampling said mixed audio signal to a sampling rate that is higher than the sampling rate of each of said audio signals to provide an up-sampled mixed audio signal; down-sampling said up-sampled mixed audio signal to a specified output sampling rate using a linear interpolator to provide a down-sampled mixed audio signal; and triggering said linear interpolator at appropriate times to interpolate a new output sample of said down-sampled mixed audio signal based on a ratio of the sampling rate of said up-sampled mixed audio signal to said specified output sampling rate.