1、 DOLBY AC-3 编解码技术 摘 要 创建家庭影院，是广大声友们和 AV 爱好者谈论已久的话题。时至今日，杜比家庭影 院环绕声系统，已发展到第三代，即杜比 AC-3 早年，老牌的英国杜比研究所研制成功适 用于剧场和影院的多声道采用“道尔贝 4-2-4”制式的多声道系统 DOLBY STEREO，使世 界各地的影视公司利用这一系统.创造了不少音响效果优秀的名片佳作。在此基础上。杜 比公司又开发了相应的家庭杜比环绕声系统，将其称为 DOLBY SUR-ROUND，与影院用 的杜比系统相区别。并于 1987 年推出改良的家用 DOLBY SURROUND PRO LOGIC 解码 器，在原有的
2、基础上增加中央声道，采用“主动式矩阵编码解码技术” ，使音频的分离度、 方向性有了较大的提高，具有“正常” “虚拟” “宽频”三种选择方式，以适应各种配置的 需要。得到更加真实的临场效果。关用 PRO LOGIC 解码器，可以与现有的电视机和相应 的功放音箱配置组成家庭影院系统。现有的 AV 功放和 AV 解码器大多采用这一制式，市 场占有率极大。 关键词：DOLBY,AC-3(杜比杜比AC-3)：AUDIOPERCEPTURAL CODING SYSTEM ABSTRACT Create a home theater, is the vast number of less two. Frie
3、nds and lovers AV has long been the topic to talk about. Today, Dolbys home theater surround sound system, has been developed to the third generation, Dolby AC-3s early years, veteran of the Dolby Research Institute successfully developed for theater and theater multichannel using the“ Doyle4-2-4“ s
4、tandard multichannel system DOLBY STEREO, the world s film and television companies using this system was created. Many sound effects of excellent business card. On the basis of. Dolby also developed the corresponding family Dolby surround sound system, called the DOLBY SUR-ROUND, and theaters in the Dolby system phase difference. And dry launched 1987improved domestic DOLBY SURROUND PRO LOGIC decoder, in the original basis of increased central channel, using“ active matrix coding an
