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Editor to share with you what dolby audio refers to the software, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to understand it!

Dolby audio is an auxiliary tool for Dolby sound enhancement; Dolby directional logic is a surround sound system developed by Dolby; and Dolby surround sound system is a film sound system developed by Dolby Lab to improve stereo quality, which combines four-channel stereo into two channels through specific coding recording.

Dolby Audio (Dolby Sound Enhancement tool) is a very easy to use Dolby Audio Enhancement tool. The Dolby Audio tool is powerful, easy to use and supports Lenovo laptops and desktops.

Directed logic:

The decoding of Dolby Pro Logic II is to restore the Dolby Surround encoded signal (2 + 0 signal) to 5.1 channel decoding. This is a new standard based on Dolby directional logic. Directional logic II has made the greatest improvement in surround channel frequency response and mono to stereo, followed by major improvements in the main sound field (left, middle, right three sound fields). The stereo signal which is not processed by Dolby coding has a certain effect by using Dolby directional logic II decoding.

Main principles:

Dolby directional logic surround sound in order to play back symmetry, the surround loudspeaker uses the left surround and right surround loudspeaker output from the amplifier, so the output of Dolby directional logic surround sound is commercially called five channels. However, because the left and right surround speakers are connected to one channel, the output is the same surround channel information, so it is still basically four channels. There are also commercial six-channel and seven-channel Dolby Pro Logic AV amplifiers. The so-called six-channel output center channel has two amplification lines, which are connected to the left center speaker and the right center speaker. However, the left and right center speakers are connected to the central channel, so it is basically four channels. The seven channels divide the surround sound into four channels, that is, the left rear surround sound, the right rear surround sound and the four surround sound, and the latter becomes the seven-channel output. However, the four surround speakers of the seven-channel output are connected to the surround sound channel and can only be counted as four-channel output. Therefore, the AV amplifier with Dolby directional logic decoder is basically four channels, whether it is five-channel output, six-channel output or seven-channel output. The left channel, middle channel and right channel of Dolby directional logic surround sound can reach 20-20000 Hz, which can meet the requirements of the full range, but the frequency range of the surround channel is only 10-7000 Hz.

Basic introduction:

Dolby orientation logic is a surround sound system developed by Dolby. Dolby surround sound system is a film sound system developed by Dolby laboratory to improve stereo quality. It combines the four-channel stereo into two channels by a specific coding method, namely, the original left channel (L), the right channel (R), the central channel (C), and the surround channel (four signals of S) are encoded into the LT and RT composite dual-channel signals, and the encoded dual-channel composite signals LT and RT are restored by the decoder to the encoded left, right, center and surround during playback. Four independent signals that do not interfere with each other are amplified and input to the left, right, center and surround speakers.

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