音频频带扩展是根据接收的宽带信号在解码端人为地重建出丢失的高频成分,以提升音频听觉质量。该文基于耳蜗滤波器倒谱参数提出了一种盲目式音频频带扩展方法。该方法模拟外耳听觉系统,提取耳蜗滤波器倒谱系数来描述宽带音频频谱信息,并利用Gauss混合模型对高频谱包络进行估计。结合基于最近邻匹配的谱细节恢复方法,实现了宽带向超宽带音频的有效扩展。主客观测试表明,该方法的重建音频质量优于基于传统音频特征的扩展方法。 Audio band extension is based on the received wideband signal in the decoding side artificially reconstructed the loss of high-frequency components, in order to improve audio and hearing quality. This paper proposes a blind audio frequency band extension method based on cochlear filter cepstrum parameters. The method simulates the auditory system of the external ear, extracts the cochlear filter cepstral coefficients to describe the broadband audio spectrum information, and estimates the high-frequency spectral envelope using Gaussian mixture model. Combined with the spectral details recovery method based on nearest neighbor matching, an effective extension of broadband to ultra-wideband audio is achieved. The subjective and objective tests show that the proposed method has better audio quality than the traditional audio features.