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杜比AC—3,又称为杜比数字环绕声(Dolby,digital),是1994年美国杜比实验室与日本先锋公司联合开发的产品。由杜比AC—3解码器为核心电路组成的AV功放系统,具有很高的保真度,极好的环绕声效果。它的声道分离度、动态范围、信噪比、声场的深度、定位、临场感等均能达到相当高的水平,被广泛应用于高清晰度电视机、数字有线电视系统、AV家庭影院系统等。真正的AC—3环绕声,具有5.1声道的输出功能,它可分出四种音频信息:A型解码器解出全独立5.1声道数字环绕声;B型解码器
Dolby AC-3, also known as Dolby Digital (Dolby, digital), in 1994 Dolby Laboratories and Japan’s Pioneer joint development of products. AV amplifier system composed of Dolby AC-3 decoder core circuit, with high fidelity, excellent surround sound effect. Its channel separation, dynamic range, signal-to-noise ratio, sound field depth, positioning, presence and so can reach a very high level, is widely used in high-definition television, digital cable TV system, AV home theater system Wait. True AC-3 surround sound with 5.1-channel output, which separates four types of audio information: A-mode decoder for full independent 5.1-channel digital surround sound; B-mode decoder