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随着MD、DCC、DAB的相继推出,数字音频技术得到了广泛的应用。由于数字音频信号要求大存贮量和传输能力,因此数字音频信号压缩编码对于多媒体通信.HDTV和DAB等具有重大意义。本文对DCT在宽带数字音频编码中存在的问题以及MDCT的性能做了分析,结果表明MDCT应用于宽带数字音频编码比DCT具有明显的优越性,并且克服了DCT存在的边界效应,最后给出了MDCT在宽带数字音频编码中的应用实例。
With the launch of MD, DCC and DAB, digital audio technology has been widely used. Because digital audio signals require large amounts of storage and transmission capacity, digital audio signal compression codes for multimedia communications. HDTV and DAB have great significance. In this paper, we analyze the problems of DCT in wideband digital audio coding and the performance of MDCT. The results show that the application of MDCT to broadband digital audio coding has obvious advantages over DCT and overcomes the boundary effect of DCT. Finally, Application Example of MDCT in Wideband Digital Audio Coding.