Popularity: Differences in bit rate, frame rate, and resolution

Bit rate is the number of digits transmitted per unit time during data transmission. Generally, the unit is kbps, that is, a thousand bits per second. The general understanding is the sampling rate. The larger the sampling rate per unit time, the higher the accuracy. The closer the processed file is to the original file, but the file volume is proportional to the sampling rate, therefore, almost all encoding formats focus on how to use the lowest Bit Rate to achieve the least distortion, and the CBR (fixed bit rate) and VBR (Variable Bit Rate) derived from this core ), all the articles are made in this regard, but things are not absolute. In terms of audio, the higher the bit rate, the smaller the compression ratio, and the smaller the sound quality loss, the closer the sound quality is to the source. "Bit Rate" is distortion. The higher the bit rate, the clearer it is. On the contrary, the picture is rough and multi-Mosaic. The information in the computer is represented by binary 0 and 1, each of which is 0 or
1 is called a single bit, expressed in lowercase B, that is, bit (BIT); capital B Represents byte, that is, byte, one byte = eight digits, that is, 1B = 8B; the preceding capital K indicates a thousand characters, that is, a thousand characters (Kb) or kilobytes (KB ). Indicates the size unit of the file. Generally, bytes (Kb) are used to indicate the file size.
Kbps: First, you need to know that PS refers to/s, that is, every second. Kbps indicates the network speed, that is, the number of kilobytes of information transmitted per second (k indicates the kilobytes and kb indicates the number of kilobytes ), in order to intuitively display the fast transmission speed of the network, companies generally use KB (kilobytes) to indicate the number of kilobytes transmitted per second if it is kbps. 1 kbps = 8 kbps.
The Internet access speed of ADSL is 512 kbps. If it is converted into bytes, It is 512/8 = 64 Kbps (that is, 64 kilobytes per second ).

In short, the number of frames is the number of frames transmitted in one second. It can also be understood as the number of frames that a graphic processor can refresh several times per second. FPS (frames per second) is usually used). Each frame is a static image, and the rapid continuous display of frames forms the illusion of motion. A higher frame rate allows you to get smoother and more realistic animations. Frames per second
The more FPS, the smoother the displayed action. Generally, 30 FPS is acceptable, so the minimum FPS to avoid lD is 30. Apart from 30 FPS, some computer video formats, such as Avi, can only provide 15 frames per second. The reason why we can use cameras to see continuous images is that image sensors constantly capture images and transmit them to the screen. When the transmission speed reaches a certain level, the human eye cannot identify the time gap between pictures, so you can see continuous dynamic pictures.
The number of frames per second (FPS) or frame rate indicates the number of times a graphic processor can update each second. A higher frame rate allows you to get smoother and more realistic animations. In general, 30fps is acceptable, but improving the performance to 60fps can significantly improve the interaction and authenticity, but generally it is not easy to notice that there is a significant increase in smoothness when it exceeds 75fps. If the frame rate exceeds the screen refresh rate, only the graphic processing capability is wasted, because the display cannot be updated at such a fast speed, so that the frame rate exceeding the refresh rate is wasted.
Generally, "FPS (frame per second, number of screen updates per second)" is used to represent this indicator. When watching TV and movie images, as long as the screen refresh rate reaches 24 frames/Second, it can satisfy people's needs. Similarly, when playing a normal game, you only need to update it at a rate of 24 frames/second, but in some high-speed games (such as shooting games ), if the screen update rate is still only 24 frames per second, the screen will feel dull and not smooth enough.
Although theoretically, the faster the image refresh rate, the better, the higher the refresh rate has no practical significance-when the image FPS reaches 60 frames/Second, it can already meet the needs of most applications. Under normal circumstances, if the average FPs of the game screen can reach 30 frames/Second, the screen is basically smooth; 50 frames/second is supported, you can basically feel the feeling of the cloud flow. It is difficult for ordinary people to tell 60
What is the difference between frame/second and 100 frame/second.

(2) What affects FPS?
Since the higher the refresh rate, the better, why do we need to emphasize that there is no need to pursue a high refresh rate? The reason is that when the display resolution remains unchanged, the higher the FPS, the higher the processing capability of the video card.

The screen displayed on the computer is output by the video card. Therefore, the filling of each pixel on the screen must be calculated and output by the video card. When the screen resolution is 1024 × 768, the screen refresh rate must reach 24 frames/second, the number of pixels that the video card needs to process in one second reaches "1024 × 768 × 24 = 18874368 ". If the screen update rate is required to reach 50
Frame/Second, the data volume suddenly increases to "1024 × 768 × 50 = 39321600 ".

The relationship between FPS and resolution and video card processing capability is as follows: processing capability = resolution × refresh rate. This is why the image becomes smoother when the resolution is set to a greater value during a game.
The bit rate affects the volume, which is proportional to the volume. The larger the bit rate, the larger the volume. The smaller the bit rate, the smaller the volume.
The frame rate affects the smoothness of the image, which is proportional to the smoothness of the image. The larger the frame rate, the smoother the image. The smaller the frame rate, the more dynamic the image is. If the bit rate is a variable, the frame rate also affects the volume. The higher the frame rate, the more images pass through each second, the higher the bit rate and the larger the volume.
Resolution affects the image size, which is proportional to the image size. The higher the Resolution, the larger the image. The lower the Resolution, the smaller the image.

After reading the relationship above, you will find that the definition content is not mentioned, because the definition is dependent on the two elements, you need to discuss the two situations.

First, let's clarify the concept of "clarity": "clarity" means that the image is very delicate and has no mosaic. The higher the Resolution, the clearer the image.

To put it simply:

When the bit rate is fixed, the resolution is inversely proportional to the definition. The higher the Resolution, the less the image is, the lower the resolution, and the clearer the image.
When the resolution is fixed, the bit rate is directly proportional to the definition. The higher the bit rate, the clearer the image. The lower the bit rate, the less unclear the image.

However, the fact is not that simple.

This can be said: When the bit rate is certain, the resolution values within a certain range will be clear; similarly, when the resolution is certain, the bit rate values within a certain range are clear.

Let's talk about mosaic first, according to Baidu Encyclopedia:
Mosaic is a widely used image (video) processing method. This method degrades the Color Order details of a specific area of the image and causes the color block to be disrupted, because the Blur looks like a small grid, the image is called Mosaic.
We don't want mosaic during video conversion. The reason is that the bit rate is insufficient and the color order is missing. For example, each of the 10 adjacent pixels of the source video represents a color. The 10kbp/S bit rate is required, and you only allocate 2kbp/s to it, then the original 10 colors can only be left with two. If the resolution of 10 pixels is maintained, each 5 pixels will share one color, the result is that the screen area of these five pixels is filled with a color, and the screen becomes rough.

For example, we give a video 8000 kbp/S bit rate, which is a relatively high bit rate, it ensures that each pixel on the screen represents an independent color block at a resolution of 720*576 instead of rendering from an adjacent Color Block. In this 8000 kbp/S bit rate, we say that as long as the resolution is smaller than 720*576, the image is clear, because the smaller the image, the less you need to add color blocks by rendering.

Conversely, when the resolution is limited to 352*288 (the image size is 720*576 of 1/4), The kbp/S bit rate ensures the independence of each pixel, as long as the bit rate is higher than kbp/s
The image definition can be ensured.
We recommend that you refer to "common video CD algorithm, standard resolution, and standard frame rate (vcd svcd kvcd DVD kdvd hdvd)" to see which resolution the source video and which resolution are similar, in this way, the source video can be rendered to a minimum.

If the source video is of high-definition quality and the resolution is extremely high, it is much higher than the DVD specification. Therefore, because the maximum resolution of the DVD specification is 720*576, it cannot be higher, the target resolution can be up to 720*576.

As mentioned above, the resolution does not determine the definition. when the resolution is fixed, the bit rate must be higher than a certain value to maintain absolute clarity. Therefore, if the target bit rate is too low, mosaic is normal.

Reducing the resolution can certainly solve the mosaic problem, but it will lose a lot of details. playing on a large screen TV will produce a grain sensation due to magnified rendering. However, there is no obvious difference on small TVs.

When no mosaic occurs or no mosaic occurs, and more image details are retained with higher resolution, the result is that the space occupied by the disc is huge, and a disc cannot burn much content.

The conflicts here are a headache. If someone else cannot help you make this decision, you can only weigh the advantages and disadvantages yourself. You cannot have both the fish and the bear's paw!