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Quality enhancement of coded transient audio with a post-filter in frequency domain

  • Jing Wang*
  • , Hailong He
  • , Jingming Kuang
  • *Corresponding author for this work
  • Beijing Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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 doesn't need side information from the encoder and can be used in any audio decoder.

Original languageEnglish
Title of host publicationICSP2010 - 2010 IEEE 10th International Conference on Signal Processing, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages506-509
Number of pages4
ISBN (Print)9781424458981
DOIs
Publication statusPublished - 2010

Publication series

NameInternational Conference on Signal Processing Proceedings, ICSP
ISSN (Print)2164-5221
ISSN (Electronic)2164-523X

Keywords

  • Discrete Cosine Transform (DCT)
  • Post-filter
  • Short-term posr
  • Transient audio

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