文件名称:
Low-Power Implementation of the Bluetooth Subband Audio Codec.pdf
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上传时间: 2020-06-03
详细说明：This paper describes a low power implementation of the
Bluetooth Subband CODEC (SBC) for high-fidelity wireless
audio. The design uses a configurable Weighted Overlap-Add
(WOLA) filterbank coprocessor to implement the analysis and
synthesis filterbanks. A new method to convert the two-times
over-sampled, complex WOLA subband signals to equivalent
critically sampled, real-valued SBC subband signals is presented.
The WOLA coprocessor allows for an efficient parallel
implementation of the filterbank and quantization portions of the
SBC algorithm. Details of the overall system design are also
presented, including measurements of power consumption and
resource requirements. The final real-time, fixed-point
implementation is compared to an off-line floating-point
reference and found to produce no audible difference in decoded
signal quality.
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