人们口中常说的播放系统主要包括三大部分组成，分别为音视频播放机、AV放大器、音箱系统。三者缺少了任何一部也不能称为家庭影院的播放系统。
People often say that the playing system mainly consists of three parts: audio and video player, AV Amplifier and speaker system. None of the three is a broadcast system that can't be called a home theater.
音视频播放机
Audio and video player
在市面上我们可以找到很多之如LD、录像机、VCD机或DVD机等。但作为现代家庭影院中使用的播放系统，有一部分LD、录像机、VCD机也算不上是其中的一部分。好像VCD机，其使用的VCD碟片为MPEG-1格式，图像被严重压缩，画质失真非常之大，根本不能说是影院效果。所以使用VCD机不能算是家庭影院播放系统的中的音视频播放机。DVD机是现在最普及也是组成家庭影院播放系统的基本配置。而不支持多声道播放的也不能算是组成家庭影院播放系统的音视频播放机。
In the market, we can find a lot of them, such as LD, VCD or DVD player. But as a modern home theater used in the play system, there are some LD, video recorder, VCD machine is not a part of it. Like a VCD, its VCD disc is MPEG-1 format, the image is seriously compressed, the image quality distortion is very large, can not be said to be cinema effect at all. Therefore, the use of VCD can not be regarded as a home theater broadcast system in the audio and video player. DVD player is now the most popular and basic configuration of home theater playing system. The audio and video players that do not support multichannel play can not be regarded as the audio and video players that constitute the home theater playing system.