【 Weak current College 】 what is a true surround sound---Power By 【 China power house network 】

Surround sound system is usually an audio-visual room rear surround speakers are set up, but not an audio-visual room rear mounted two speakers even if you have surround sound.

If it's just in front of two speakers and parallel to a pair of speakers, the latter after the sound and the former is exactly the same, without surround sound decoding and cannot be truly called the surround sound system.

So, what part of the surround sound decoding?

DVD or video tape the two current major software home video, voice part only have left channel signal space, generally the simplest Dolby matrix encoding needs to have left, right, Center and around the four groups of signals, how can "plug" to only two-channel space software? the answer is central and surround two sets of signals into the original left and right channels of signals. Center channel signal is the left channel has a message that surround you is the difference between the two. In other words, the left and right Mono-phase signal is the central channel, the inverted signals is to surround. In this way, the original four-channel signal is packed into a two-channel and surround sound decoder, that is, mixed with left and right channels of central authorities and surround signal separation (decode), then to the channel of the amplifier with power amplifier, speaker. Therefore, surround speakers, center channel and placed in the preceding two left and right speakers to the sound is not the same, do not think, just simply followed by one set of speakers, the front left and right speakers of the signal sent in parallel, you can get surround sound effect.