电子防震系统音频编解码器及编解码方法研究

为提高电子防震系统音频编解码效率，分别在编解码器关键模块上进行了算法优化，提出了一种高效的编解码实现方案。在时频分析模块中，利用MDCT的对称性和奇偶性，快速得到MDCT变换输出值，节省了运算时间和计算资源，提高了编码效率。在量化／熵编码模块中，采用非线性量化和Huf fman编码来压缩数据，使量化的循环迭代次数减少，在保证量化误差最小化的前提下，提高编码速度。

Electronic Shock Protection System Audio Encode/Decode Technology

An efficient audio encoder/decoder for Electronic Shock Protection System is exhibited in this paper, by carrying out the algorithm level optimizations of critical modules. In time frequency analysis module, the N-point MDCT transform is employed to improve the computation rate and the data throughput. Finally, to meet the bit rate/distortion critical, a novel technique through pre-processing and adjustment of scale factor in quantization block is used.