1. Dolby sound effect means: Dolby Pro Logic is a surround sound system developed by the American Dolby Company. Dolby surround sound system is a theater sound system successfully developed by Dolby Laboratories in the United States to improve stereo sound quality.

2. 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), and center channel The four signals of channel (C) and 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 left, right, center, and surround signals are four independent signals that are independent of each other. After amplification, they are input to the left speaker, right speaker, center speaker, and surround speaker respectively.

3. Dolby Sound refers to powerful technologies used to provide very rich, clear and shocking sound effects in theaters, homes and on the road. It is generally mainly used to provide a vibrant listening experience for content that is broadcast, played or enjoyed through optical discs, and its applications are relatively wide.