NVIDIA Broadcast software is a live broadcast software released with RTX 30 series graphics card conference. This software has powerful and easy-to-use live broadcast effects, such as one-button switching effects such as background deletion, portrait tracking, background replacement, background blurring, and noise elimination effects in noisy environments. It can be said that it is a professional software specially provided for anchors.
For the previous live broadcast, its strength is that the anchor no longer needs any background layout, and its working principle is that it is deeply learned by DGX supercomputer using AI algorithm, so users only need an ordinary camera and a GeForce RTX series graphics card.
NVIDIA Broadcast
At present, NVIDIA Broadcast software has been open for download. First, enter NVIDIA official website, in the top bar [Platform → Games and Entertainment → Overview]. After entering the official website of GeForce, you can also find live broadcasts in the top bar of games and technologies. After entering the page, you can find out the details and download them.
To use this software, the graphics driver version needs 456.38 or higher, and because the software uses AI algorithm, a GeForce RTX series graphics card is also essential.
01NVIDIA Broadcast software debugging
Noise reduction effect
Open NVIDIA Broadcast software, and the interface is simple and easy to understand. The home page is the microphone adjustment and testing interface, and the current effect is only noise elimination. I believe more audio effects will be added in the subsequent version update.
In the actual test, our recording location is the office, and the environment is noisy, accompanied by mechanical keyboard and ambient human voice. The noise reduction effect is very obvious, and the noise reduction intensity can be adjusted freely.
Audition of contrast effect
In the speaker setting in the second column, users can choose the noise reduction effects of different scenes for comparative audition. The preset scenes include environmental noises such as air conditioning, fans and rain.
Background blur
In addition, in the camera effect, the first one is the blurred background. When we turn on the effect, we can see that the portrait and the background are separated immediately, and there is almost no distortion at the edge of the character when the clothes are dark. If you want different blur intensity, you can also adjust it yourself and preview it in real time.
Background replacement
Of course, if you don’t feel satisfied with the blurring effect and don’t want your own room as the background, the software also provides the effect of virtual background replacement, and users can choose any picture as the background. We choose the wallpaper of Cyberpunk 2077 as the background, and we can see that the cutout is quite delicate and blends well with the background.
Background deletion
Background removal is also the most commonly used effect for game anchors at present. After selecting this effect, you can directly preview the characters after keying. In the past, if we want to achieve the effect in the picture, at least we need to prepare a green screen behind us for matting, but the power of NVIDIA Broadcast software lies in this, which can accurately identify portraits in our completely messy office and make your room instantly become an anchor room. Moreover, you don’t need to make any preparations for this, just need a GeForce RTX graphics card and NVIDIA Broadcast software.
Automatic focus tracking
The final autofocus effect is more suitable for live broadcast anchors with goods, chatting, dancing and other categories. It can automatically track the head of the person in front of the camera, as long as it can keep accurate tracking within the camera range, there is no need to worry about drawing the person because of taking the goods next to it.
Practical application of 02 software
At present, Cyberpunk 2077 can be said to be a phenomenal game, and the number of online users even jumped to the top in steam statistics. As a stand-alone game, it surpassed the popular online games such as DOTA2 and CS: GO.
Find Camera(NVIDIA Broadcast)
For live games, the most commonly used software is OBS, which is powerful and easy to use as the version is updated. Similarly, after turning on OBS, the camera device needs to be manually adjusted to [Camera(NVIDIA Broadcast)], and the professional anchor effect can be achieved after confirmation.
"Cyberpunk 2077" Live Test Scene
In the live broadcast test, we chose Cyberpunk 2077 to see the effect, but users should pay attention to the fact that if they want to broadcast live, they must choose the "no nudity" mode, otherwise …
Actual live broadcast picture
In the actual live broadcast, the anchor can achieve the key effect through the background deletion function of NVIDIA Broadcast software, which is very convenient. Moreover, this effect does not require any additional equipment for the user, just an ordinary camera.
03NVIDIA NVENC encoder
Coding setting
In addition, there will be two coding forms in the push stream setting, namely, soft solution x264 and NVIDIA hardware decoding NVENC. For users who have had live broadcast experience, it is known that the CPU will be occupied very much in the live broadcast process, and the performance may even reach 100% load. Let’s take a look at how the two encodings affect the CPU utilization.
X264 coding
First of all, we test the soft solution of x264 coding. The scene chooses Kabuki, the most popular block in Cyberpunk 2077, and uses x264 coding in the same scene. The CPU occupancy rate is 12.3%.
NVENC coding
Using hardware decoding NVENC coding in the same scene, the CPU occupancy rate is 3.3%, and the difference between the two decoding methods is 9%. The CPU used by the author is i7-9700KF, which belongs to the last generation of high-end products. In fact, for live streaming, streaming is more stressful for CPU, but game anchors usually don’t involve streaming, but NVENC decoding can still greatly reduce the burden on CPU.
Tensorcore third-generation 04Tensor Core
Sparse deep learning
In NVIDIA Ampere architecture, besides ray tracing, Tensor Core has also been greatly strengthened. In the third generation Tensor Core, NVIDIA introduced sparse acceleration, which can automatically identify and eliminate unimportant DNN (Deep Neural Network) weights, while still maintaining good accuracy.
Firstly, the original dense matrix will be trained to delete the sparse matrix, and then the sparse matrix will be trained to realize sparse optimization, thus improving the performance of Tensor Core.
The processing capacity of the third generation Tensor Core has been greatly improved.
In NVIDIA Broadcast software, according to NVIDIA official statement, the application of the third generation Tensor Core can reduce the performance expenditure by half. For anchors, less performance occupation means higher game frames and picture effects in live broadcast.
It is not difficult to find that NVIDIA Broadcast software is of great help to the increasingly popular live broadcast market. It has powerful functions and is easy to use, and it is constantly updated and improved. In live broadcast or conference, the background is no longer a problem at any time and place. As long as you have this software, your room can become a professional live broadcast room anytime and anywhere.
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