Dolby and THX
How They Work Together

Dolby和THX如何协同工作

 

 

 

To clarify a popular misconception, Dolby and THX are not competing sound systems. Rather, the two coexist in high-quality theatres the world over to bring you the very best sound experience possible.

There are two subsets of equipment which comprise the sound system in a theatre. The "A" chain consists mainly of the equipment installed in the projection booth to actually read the soundtrack from the film, decode it, and process it. The signal that results is fed to the "B" chain—that is, basically, the theatre's amplification and loudspeaker system.

The professional cinema equipment manufactured by Dolby Laboratories is used in the "A" chain: cinema sound processors for converting the analog and digital sound information on the filmstrip into high-quality audio. Lucasfilm's THX division sets standards primarily for the "B" chain, including loudspeaker placement and the acoustics of the theatre auditorium. To obtain THX certification, a theatre must comply with those standards and also make use of equipment from THX-approved manufacturers. All Dolby cinema processors are THX-approved, and by far the majority of THX theatres are Dolby installations.

What does this mean for you as a moviegoer? That if you see both the Dolby and THX logos on the theatre marquee or in the newspaper, it's not a mistake: Dolby and THX can and often do go together. Neither is "better" than the other, but different and complementary, and Dolby soundtracks played back in THX auditoriums will give you a sound experience that is exceptionally close to what the filmmaker intended.

Wherever possible, look for theatres that offer both Dolby Digital and THX, since the added dynamic range and frequency response a Dolby Digital soundtrack provides benefit greatly from playback in an auditorium that meets THX specifications.

What's more, both Dolby and THX are sound advantages you can enjoy in your home as well as at the movies. In home theatre, Dolby Surround Pro Logic is the core audio technology for surround sound and Home THX components optimize the reproduction of film soundtrack material. See our Home Theater section for more information.

Visit the THX web site to find out more about the Lucasfilm THX program both in movie theatres and in the home.

 

   

 

需要说明的是,Dolby和THX并不是相互竞争的系统,而是相互共存的。在世界各地的电影院里,两者结合,努力带来最好的声音体验。

电影院的音响系统包括两个环节。A环节主要是安装在放映室里的设备,负责从胶片上读取信号,解码并处理。处理的结果送入B环节--影院的功放和音箱。

A环节使用Dolby实验室的专业电影设备,从胶片上读取数字或模拟的信号,并把其转换为高质量的音频。Lucasfilm的THX主要负责B环节,包括音箱的摆位和厅堂的声学调整。为了获得THX认证,影院不但要使用THX认证的设备,影院本身还要按照THX标准改造。所有的Dolby电影院处理器都是THX认证的,绝大多数的THX电影院都安装了Dolby的设备。

对于电影观众这有什么意义?Dolby和THX可以并且经常协同工作的,所以电影海报上同时有Dolby的THX的标志没有什么不对。两者之间,并不是一个比另一个更好,两者不是同一概念,两者互为补充。Dolby的音轨在THX认证的厅堂里回放时,你能更接近的体会到导演的意图。

尽可能到Dolby Digital和THX标准的电影院去看电影,因为Dolby Digital提供更大的动态范围和频率响应,更适应THX的规格。

Dolby和THX也可以使你在家中得到电影院里一样的体验。THX为在家庭环境中回放Dolby的电影音轨做了特别的优化。可以访问Dolby的Home Theater章节获得更多信息。

你还可以访问THX的站点 找到更多关于THX的内容。

 

 

m17design.myetang.com
m17译自www.dolby.com
2002/01

 

 

 

 

 

 
 
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