Traditional video wall splicers under FPGA architecture usually do not support audio transmission, but the central control room or command center needs to process the audio signal. Integrators use the audio separator to separate the audio of the input signal source, and then. The audio signal is uniformly transmitted to the audio matrix or audio processor, and finally output to each speaker device. This solves the problem that the traditional splicer cannot handle the audio, but the system is too cumbersome, and the user needs to use two operating software (video wall controller software / audio matrix software), the project will have many more unstable factors.
The iSEMC VK-S video wall controller has been innovated. The audio output interface is integrated in the input card, which can directly strip the audio of the input signal and transmit the signal to the audio matrix through the audio cable. At the same time, the VK-S control software supports. The third-party control page, that is, you can customize a control page about the audio matrix in the page, which realizes the same software to control two devices, which is convenient for customers to operate and alleviates the maintenance problems in the later period.
Mainstream audio is usually divided into Mono and Stereo, so what is the difference between them?
When we listen to sound through audio playback equipment, our brain will perceive the information of the sound according to the difference between the sound signals received by the left and right ears, including loudness, width, depth, distance...
- Mono
Mono is the oldest and most basic way of recording sound using only one audio channel. Because there is only one audio channel for mono, our brain receives no difference in the information from the left and right ears, and the auditory system will not produce psychoacoustic positioning, so there will be no difference in width and depth.
Although the current audio recording methods are mainly stereo, mono recording is still very common, such as the broadcast we listen to. Mainly because the mono signal is simple and not easy to lose, it is still a good choice in some occasions that do not require too high sound quality.
- Stereo
Stereo includes many kinds, such as: two-channel stereo, surround sound, panoramic sound...Listen to me introducing you one by one:
2.1 Two-channel stereo: This is the stereo that we hear most often in our daily lives. Regardless of music, TV, etc., they are all made in stereo. Two-channel stereo has two audio channels, so it can give the listener a sense of breadth, and even a sense of direction under certain production conditions. We often wear headphones to listen to music, and we can feel that some sounds are on the left and some are on the right. When the sound on one side is louder than the other side, we will feel the sound has a direction. The current dual-channel stereo technology is very mature.
2.2 Surround sound: This audio production method is mainly used in the film industry. The current standard surround sound is 5.1 channels. Including 5 full-band audio channels, and a bass (cannon) channel. Because there are 3.1 channels more than two-channel stereo, in such a sound environment, the listener can clearly perceive the direction of the sound (front, back, left, and right), depth, and so on. Of course, surround sound equipment is very expensive, but it can bring us an excellent audio and video experience.
2.3 Panoramic sound: The simplest explanation for the difference between panoramic sound and surround sound is to give the listener an extra level of sound perception. It can be imagined that a person is placed in a ball, and all points of the ball can make sounds. More tends to our natural sound field, more immersive. Now we can feel the charm of panoramic sound in the "Dolby Atmos" movie theater. Simply put, a few additional speakers are installed on the ceiling of the auditorium.
The VK-S uses a 3PIN audio interface, with a distinction between left and right channels, which realizes stereo audio and improves the overall audio experience.
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