基于音频感知编码的减谱去噪和水印嵌入算法

Spectral subtraction and watermark embedding algorithm based on audio perceptual encoding

将音频感知编码的减谱去噪和水印嵌入算法与编码算法有效结合在一起 ,通过合理利用编码过程中的变换和控制 ,使得新算法获得了优于传统算法的性能 ,并完善了软件编码器性能 .实验结果表明去噪算法提高了信噪比并改善了主观听觉效果 ;水印嵌入算法既避免了后续压缩编码过程对水印信号的损坏 。

The spectral subtraction and watermark embedding algorithm are combined with audio perceptual encoding algorithm efficiently to achieve better performance than the traditional methods and perfect the software encoder by means of reasonable utilization of the transforms and controls in the encoding process. The experiments show that the noise reduction algorithm can improve the SNR and get better subjective impression. By using the new watermark-embedding algorithm the imperceptibility can be ensured, the loss in the following compression and encoding process can be avoided at the same time.