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With the rapid development of digital television technology , people on the audio quality requirements are also increasing . Audio post-processing as part of the audio playback system , the audio quality improvement has played a crucial role , allowing device manufacturers to allow devices with better sound quality from the many products on the market today come to the fore , with to huge economic benefits. Audio post-processing to achieve a variety of programs , including a dedicated chip , general DSP, embedded RISC processor, FPGA , these options have their pros and cons . Considering the performance, price , energy efficiency, flexibility and other factors, and post- processing algorithms for audio features , the subject of the final selection of LX5180 as an audio post-processing algorithm development platform. LX5180 is a RISC processor , except with the MIPS architecture , but also joined the DSP features, which greatly improves the performance of digital signal processing , fully able to meet the needs of the development of the project . In this thesis, audio post-processing of the parametric equalizer design, reverberation design and SRS virtual surround sound algorithms have been studied and successfully LX5180 processor platform to achieve a 5-band parametric equalizer , based on the model Schroeder reverb and SRS virtual surround sound algorithms SRS WOW HD feature. For LX5180 processor features , the thesis of the audio post-processing algorithm optimized key modules were compiled , optimized code performance has been greatly improved. For a sampling rate of 44.1kHz, a length of 9,564,576 samples of dual-channel wav files for processing ,5-band parametric equalizer occupies approximately 19.6% of the CPU, reverb takes about 21.2% of the CPU, SRS WOW HD about occupied 48.8% of the CPU, has reached the real-time requirements .
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