An Improved Subband Domain Temporal Processing for MPEG Surround Audio Coding

• Main Authors: Tung, Yun-Hsiu, 董昀修
• Other Authors: Hsiao, Hsu-Feng
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/61094531916146692309

碩士 === 國立交通大學 === 多媒體工程研究所 === 99 === MPEG Surround Audio Coding is an efficient compression standard of high-quality multichannel sound. The compression concept uses down-mix and spatial parameters calculation to reduce the channel number and achieve high compression rate. In decoder, an upmixing module can reconstruct the multichannel signals by using the output signal of decorrelator and the spatial parameters. After the signal is processed by decorrelator, the transient property has been destroyed, affecting the perceptual listening quality. In order to overcome the defect, MPS proposes Subband Domain Temporal Processing (STP) shaping tool. However, the objective and subjective quality assessments still show negative results on the STP-processed signals. This thesis modifies the current STP structure for improving the results of the quality assessments