Method and system for an efficient implementation of the Bluetooth® subband codec (SBC)

摘要

A method for processing audio may include performing using one or more processors and/or circuits in a Bluetooth enabled communication device, receiving audio samples that are encoded by a Bluetooth subband CODEC. The encoded audio samples may include inverse discrete cosine transformed windowed audio data. Shifted subband samples corresponding to the received encoded audio samples may be discrete cosine transformed during decoding by a receive Bluetooth subband codec. The inverse discrete cosine transformed windowed audio data may be generated by an encoding matrix operation. Windowing of the audio data may occur prior to the encoding matrix operation. A plurality of filter coefficients may be utilized for the windowing of the audio data. The shifted subband samples may be discrete cosine transformed during a decoding matrix operation.