![\"BIT](\"https:\/\/i.ytimg.com\/vi\/7ws_MXo_dHs\/mqdefault.jpg\")
<\/p>\n<\/p>\n
Frequently used bit depth in videos
\nThe commonly used bit depth for video is “24 bit” .<\/p>\n
![\"Video](\"https:\/\/www.freevideoworkshop.com\/wp-content\/uploads\/2019\/03\/Video-Color-Depth-Number-of-Colors.jpg\")
<\/p>\n
We usually look<\/p>\n
digital terrestrial broadcasting
\nBS\/CS Broadcasting
\nYoutube
\nNico Nico Douga
\n\u00b7 \u00b7 Etc.
\nEtc are all 24 bit.<\/p>\n
All the encoders that we use regularly are also 24-bit encoded. (Although not shown in settings)<\/p>\n
I think it’s good to recognize that “all the videos I usually watch are 24-bit!”.<\/p>\n
Difference in the number of colors.
\nFor example, in the case of 24bpp in RGB, 8 bits are assigned to R, G and B respectively.<\/p>\n
A: 8 bit
\nG: 8 bit
\nB: 8 bit
\n8 bits is “256” in decimal.<\/p>\n
In other words, you can see that “256 colors” can be expressed for each of R, G and B.<\/p>\n
Also, there are as many color combinations as there are R, G, and B combinations, so<\/p>\n
256 colors \u2715 256 colors \u2715 256 colors = 16777216 colors \u2252 16.77 million colors
\nThus, you can see that a total of 16.77 million colors (in the 24-bit case) can be expressed.<\/p>\n
By the way, most of the “maximum display colors” of general personal computer screens are 16.77 million colors.<\/p>\n
screenshot_2971
\n\u25b2 (Reference) Display I am using: DIOS-MF241XB specifications | Wide model | IODATA IO DATA DEVICE
\nAs you can see from the specifications of the screen of the personal computer you are using, it probably has 16.77 million colors.<\/p>\n
soon,<\/p>\n
The number of colors in the videos we usually watch… “16.77 million colors”
\nMaximum number of colors for the screen we are using… “16.77 million colors”
\nThat is, most of the images that we usually see are “16.77 million colors”, and the maximum number of colors on the screen that we usually use is also “16.77 million colors”.<\/p>\n
Image quality comparison
\nUp to about 24 bpp, the difference in image quality is relatively visible.<\/p>\n
2_bit 4_bit 8 bits True Color
\n\u25b22bpp \u25b24bpp \u25b28bpp \u25b224bpp
\nQuote: Color depth – Wikipedia<\/p>\n
For example, with an x264 encoder, you can encode at 24 bpp or more with a “high bit depth” setting of 30 bpp (10 bits each), but you can barely tell the difference from 24 bits.<\/p>\n
x264_high bit depth
\n\u25b2 In case of x264guiEx from AviUtl<\/p>\n
Also, (as mentioned above) most PC screens can only express up to “16.77 million colors (24-bit)” in the first place.<\/p>\n
Therefore, in most personal computer environments, it is (physically) impossible to distinguish between 30-bit and 24-bit.<\/p>\n
However, in the case of “video originally shot at 24 bits or more”, such as “animation” and “movie”, when encoding with 30 bits (10 bits each), the color-related filter effect will be applied without problems. As a result, banding (the noise that occurs in continuous parts of color) is reduced, and image quality tends to improve.<\/p>\n
\u25bc An image of an animation encoded in 24-bit and 30-bit and the same part of the same frame cropped (the original frame is this )
\n8bit– 10bit–
\n\u25b2 24bit
\n(You can see that the banding is noticeable compared to 30 bits) \u25b2 30 bits
\nSo that doesn’t mean it doesn’t mean anything at all.<\/p>\n
You can check it in the following blogs.<\/p>\n
rigaya diary and notepad image quality comparison 2015.01
\nX264 10 bit depth is effective in anime: Cute Leaf
\nName
\nFrequently used bit depths (color depths) are named.<\/p>\n
16 bpp (65,536 colors): high color
\n24 bpi (16,777,216 colors): Full color
\n32 bpp (16,777,216 colors + \u03b1 channel): true color
\n48 bpi (281,474,976,710,656 colors): Deep Color
\nReference : What is color depth? \uff5c Color Depth \u2013 Meaning \/ Definition: IT Glossary<\/p>\n
How to check the bit depth of a video
\nIf you use video identification software like MediaInfo ,<\/p>\n
You can easily check the bit depth of the video.<\/p>\n
screenshot_298 screenshot_298
\n\u25b2 In this case, 8 bits is the number of bits assigned to Y, U, and V.
\nSo the bit depth is 24 bits (however the effective bit is YUV420 so it is 12 bits).
\nresume
\n-Bit depth: the amount of data per pixel<\/p>\n
-The higher the bit depth, the more colors can be represented (= resulting in higher image quality).<\/p>\n
\u30fb The bit depth (color depth) of most videos is 24bpp.<\/p>\n","protected":false},"excerpt":{"rendered":"