科研之友
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摘要
The MPEG-D unified speech and audio coding (USA C) standardization process was initiated by MPEG to develop an audio codec that is able to provide consistent quality; for mixed speech and music contents. The current USAC reference model structure consists of frequency domain (FD) and linear prediction domain (LPD) core modules and is controlled using a signal classifier tool. In this letter we propose an LPD single-mode USAC structure using an adaptive widowing-based transform-coded excitation module. We tested our system using official test items for all mono-evaluation modes. The results of the experiment show that the objective and subjective performance of the proposed single-mode USAC system are better than those of the FD/LPD dual-mode USAC system.
- 出版日期2012-6
