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给出了MEPG-4AAC实时解码器在NIOSII平台的实现方案,介绍了MPEG-4AAC-LC解码算法及各关键模块优化算法。在完成实时解码要求下,结合NIOSII平台特性,对解码器在软件代码与处理器上进行优化。实验结果表明CPU时钟为80MHz时能达到实时解码要求。
The implementation scheme of MEPG-4AAC real-time decoder on NIOSII platform is given. The MPEG-4AAC-LC decoding algorithm and key module optimization algorithms are introduced. In the completion of real-time decoding requirements, combined with NIOSII platform features, the decoder in the software code and processor optimization. Experimental results show that the CPU clock to 80MHz to achieve real-time decoding requirements.