High performance speech vocoder using SIMD coprocessor

In recent years,traditional processors can’t meet the demands of data-intensive applications.An application-oriented method is presented to accelerate the speech coding algorithm,in which a coprocessor with extended instructions has been used as the main architecture.In practical,a vector-like MAC unit has been attached to a configurable LEON-2 RISC core to form a solution to reduce the computational complexity of speech coding algorithm,performance has been improved without designing dedicated hardware blocks.Results show a best improvement of those multiply-accumulation operations,in average,the time has been reduced by 45%.The whole system has been tested and verified on Stratix2 EP2S60C5 FPGA at 50 MHz.