Quality Enhancement of Coded Transient Audio with a Post-filter in Frequency Domain

摘要：

This paper proposed a post-filter in frequency domain for enhancing the perceptual quality of the coded transient audio. The post-filter is used to filter the frequency coefficients of the coded transient and consists of a short-term post-filter which is derived from the Linear Predictive Coding (LPC) predictor based on the Discrete Cosine Transform (DCT) coefficients of the transient frame. In order to compensate the overall spectral tilt, a spectral tilt compensation filter is used following the shortterm post-filter. As a result, the post-filter in frequency domain shapes the temporal noise in time domain while introducing a little distortion in audio. This kind of post-filter doesnt need side information from the encoder and can be used in any audio decoder.

关键词： transient audio Discrete Cosine Transform (DCT) post-filter short-term post-filter

作者: Jing Wang Hailong He Jingming Kuang

作者单位: Department of Electronic Engineering, Beijing Institute of Technology, Beijing, China

会议类型: 国际会议

会议名称: 2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)

会议地点: 北京

会议语种:英文

页码: 506-509

在线出版日期: 2010-08-24（万方平台首次上网日期，不代表论文的发表时间）