It synthesizes four-channel stereo sound into two channels through specific encoding methods during recording, that is, the original left channel (L), right channel (R), center channel ( C), the four signals of the surround channel (S) are encoded and synthesized into LT and RT composite two-channel signals. During playback, the encoded two-channel composite signals LT and RT are restored to the encoded The four independent signals of left, right, center and surround are amplified and input into the left speaker, right speaker, center speaker and surround speaker respectively.
SRS sound effect: (Sound Retrieval System) is the most representative 3D stereo technology developed by SRS Research Institute. It is a collective name for a series of patented audio processing technologies based on psychoacoustic principles. The original SRS three-dimensional audio technology was invented by Arnold Klayman in the early 1980s. It widens the emperor's position (i.e. the best listening area) based on the head-related transfer function (HRTF), creates a wider sound field and very accurately positions different instruments in the audio reverberation, and ultimately creates it with only two speakers Immersive three-dimensional sound field. This technology is SRS, also known as SRS 3D.
Comparative listening results between SRS surround sound system and Dolby decoding surround sound system:
Use the same two speakers and use switches to switch SRS and Dolby multiple times. During SRS, inspectors often check whether the rear speakers are working. In fact, SRS means that the front main speakers are working. SRS sound playback clarity is higher than Dolby Logic. Surround sound is a continuous three-dimensional sound field that fills the entire space; while Dolby surround sound comes from five speakers, and the listener feels a flat two-dimensional sound field.
If SRS is placed in front of Dolby, the original flat two-dimensional sound field will be transformed into a continuous three-dimensional sound field with a sense of space, giving people a real sense of a surveillance field. SRS surround sound makes people subjectively feel that the sound sources are distributed in the entire three-dimensional space. The speakers are no longer the point of the sound source. The masking effect between the sound sources is weaker than the traditional multi-channel system where the sound comes from only a few points. Much better, so SRS clarity is higher than multi-channel surround. In conventional stereo playback, the background noise is replayed from two speakers (two points), and the noise is concentrated at two points. However, when the SRS system is played back, the noise is distributed throughout the space. Compared with the concentrated noise of ordinary stereo systems, , the background noise of SRS has a very small interference effect on the sound signal, so SRS is superior to stereo playback in terms of sound restoration, playback clarity and noise reduction.
Through the above comparison, SRS is better, because good external and 3D surround can give people a better audio-visual enjoyment, but the prerequisite for this is that external speakers are needed to achieve the effect. If you only listen to the small speakers of your laptop or use headphones, the effect of SRS will not be fully exerted. In this case, the effect of Dolby may be better for you. After all, headphones only have two playback units.