LP/WLP Hybrid Scheme for Quality Improvement of TCX Coders Operating at Low Bit Rates

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概要

• 論文の詳細を見る

• In this paper, we propose a switchable linear prediction (LP)/warped linear prediction (WLP) hybrid scheme for the transform coded excitation (TCX) coder, which is adopted as a core codec in AMR-WB+ and USAC. The proposed algorithm selects either an LP or WLP filter on a per-frame basis. To provide a smooth transitions between LP and WLP frames, a window switching scheme is developed using sine and rectangular windows. In addition, a Gaussian Mixture Model (GMM)-based classification module is used to determine the prediction mode. Through a subjective listening test it was confirmed that the proposed LP/WLP switching scheme offers improved sound quality.

• 2012-07-01

著者

• Youn Dae-hee

  Yonsei Univ. Biometrics Engineering Research Center

• Park Young-cheol

  Yonsei Univ.

• LEE Tung-chin

  Yonsei Univ.

• YOUN Dae-hee

  Yonsei Univ.

関連論文

• Efficient FFT Algorithm for Psychoacoustic Model of the MPEG-4 AAC
• A Robust Room Inverse Filtering Algorithm for Speech Dereverberation Based on a Kurtosis Maximization
• LP/WLP Hybrid Scheme for Quality Improvement of TCX Coders Operating at Low Bit Rates

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