多声道环绕声技术是中高档音响普遍采用的声音处理技术,目前该技术以四声道的杜比环绕定向逻辑技术(Dolby Surround Pro Logic)和5.1声道的杜比数字技术(Dolby Digital,即AC-3)为代表。杜比环绕定向逻辑技术有四个声道(即左、中、右和环绕声),采用模拟矩阵处理技术,将四个独立声道的音轨编码到两条声道,播放时再解码回四个独立声道,成为真实的环绕声,但它 Multi-channel surround sound technology is commonly used in high-end audio sound processing technology, the technology is currently four-channel Dolby Surround Pro Logic (Dolby Surround Pro Logic) and 5.1-channel Dolby Digital technology (Dolby Digital, AC-3). Dolby surround directional logic technology has four channels (left, center, right and surround), the use of analog matrix processing technology, the four independent channels track encoded to two channels, and then decoded back to play Four independent channels to make real surround sound, but it