文档介绍：毕业设计(论文)外文资料翻译
系别:
专业: 电子信息工程
班级: 081
姓名:
学号:
附件:;2外文原文
指导教师评语:
签名:
年月日
Dolby laboratory on Dolby
Author: Tiger
Multichannel perceptual coding
Dolby AC-3is a kind of efficiency, quality and functional aspects with unprecedented effect perceptual digital audio coding technology. From the beginning of 1992, it has been for the cinema provide multichannel digital audio system and achieved in 1994into the two channel I BS application. It in the cassette and disc type family television system for transmitting multichannel digital sound function has been to the consumer electronics industry with very excited. In the United States, high definition television ( HDTV ) broadcasting the selected Dolby digital surround sound transmission, estimated that in 1996will be put into a test screening.
Many have been announced and the potential applications of the technology of test shows, Dolby AC-3decoder has a beautifully versatility. AC-3 is not a single machine system, but a kind of use can make such as bit rate and number of channels such parameters to adapt to different special application flexible procedures for the treatment of familial. Various types of all decoder in order to work on the same principle as the foundation, and designed to take full account of the future need patibility and adaptability. Important is, Dolby AC-3will be high quality sound and excellent digital efficiency is very bination. Because of the Dolby Laboratory for more than 20 years focus on human auditory research, in the development of signal processing field has accumulated rich experience, so, although AC-3than in the CD disk to the last channel lower bit rate to create a multi-channel surround sound, however, it makes the sound quality fully meet the listener expectations.
Audio : past present and future
In 30, the famous Baer Laboratories began using the three channel stereo sound. In 50, when the stereo into public movie, it uses the channel in four above, so