本文围绕杜比数字和环绕声技术等热点话题，探讨了有关高清晰度电视音频领域的一些专业问题。

This article discussed the hot topics focusing on Dolby Digital and surround sound technologies, with a probing into some professional issues related to the HDTV audio domain.

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介绍了基于人耳心理声学模型的数字音频压缩技术的杜比数字音频AC - 3。

Dolby digital audio AC-3 is introduced as a digital audio compressing technology based on human ear psychoacoustics models.

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