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在电视广播领域里,结束了模拟电视时代之后,就进入了数字电视时代。在解决了模拟电视的杂波、干扰和重影等问题之后,画面清晰度又成了人们的追求。标清电视已经不能满足越来越绚丽多彩的节目镜头,对大场面演出,或者广袤无垠的大海或太空,标清画面就无法让观众有身临其境的感受。于是,市场需求就转向了高清电视。可是,相应的高清电视只解决了画面清晰度问题,并没有在音频上做多大的改进。一些高清电视节目采用了多声道环绕声技术,但这只不过是声音的空间感有改善,而声音质量并没有提高,反而因为使用了压缩技术,使得每个声道的声
In the field of television broadcasting, after the end of the analogue television era, it has entered the digital television era. After solving the clutter, interference and ghosting problems of analog TV, the clarity of the picture has become the pursuit of people. Standard definition TV has been unable to meet more and more colorful program lens, the performance of large scenes, or vast expanse of sea or space, standard definition pictures can not let the audience have the immersive experience. As a result, the market demand turned to high-definition television. However, the corresponding high-definition television only to solve the problem of picture clarity, and did not make much improvement on the audio. Some high-definition television programs using multi-channel surround sound technology, but this is only a sense of space to improve the sound, and the sound quality did not improve, but because of the use of compression technology, making the sound of each channel