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电视节目是以图像和声音有机结合表达一定意义的。以往在模拟复合电视时代,声音仅仅是伴音,是图像的陪衬。受技术条件的限制,人们追求的主要是语音的清晰和自然。今天,电视领域正在向全数字高清晰度的时代迈进,无论是生活中的视听欣赏还是教学或商务会议中的影音演示,各种大屏幕、高清晰度的画面显示设备已相当普及,视听环境亦有了很大程度的改善。在高画质时代,人们自然要求高音质与之相适应。因此,目前无论是专业和家用视听设备,还是各种多媒体影音技术及其标准,都支持高保真和环绕立体声的音频重放。
TV shows are based on the organic combination of images and sounds. In the past in the era of analog composite television, the sound is only sound, is the image of the foil. Subject to technical conditions, people are mainly seeking the clarity and nature of speech. Today, the field of television is moving towards an era of all-digital high definition. Whether it is audio-visual entertainment in life or audio-visual presentation in teaching or business meetings, various large-screen and high-definition picture display devices have become quite popular. There has also been a great improvement. In the high-quality era, people naturally require high-sound quality to adapt. Therefore, at present, both professional and home audio-visual equipment, multimedia multimedia technologies and their standards support high-fidelity and surround sound audio playback.