how to find the bit allocation factor?

how bit allocation factor affects the quality of a video? how this factor can be used to find the quality of video? how this factors can be calculated if i have a video?

Answer 1

[Ayush]

The bit allocation factor, also known as bit-rate,significantly impacts the quality of video. This can be explained as follows:

Higher Bit Rate:

• Improved Quality: Allocating more data per second of video enhances image quality, resolution, and detail.
• Larger File Size: Higher bit rates result in increased file sizes, necessitating more storage space and bandwidth.

Lower Bit Rate

• Reduced Quality: Allocating less data per second can lead to compression artifacts, lower resolution, and a loss of detail.
• Smaller File Size: Lower bit rates produce smaller file sizes, facilitating easier storage and streaming.

Now, the Bit-rate affects the quality of video in various ways. Some of them are listed below:

• Resolution : Higher Resolution (eg. 1080p, 4K) require higher bit rate to allow streaming of video in a smooth and efficient way. For example: a 720p video can be run on a lower bit rate as compared to 1080p video, maintaing constant and similar quality.
• Content Complexity: Videos with a lot of motion or detailed scenes require higher bit rates compared to static or simple scenes.

Calculation of bit rate:

Here's the pseudo MATLAB code for calculation of bit-rate:

% calculating bits transferred per second
bitRateBps = fileSizeBits / durationSeconds;
% Converting bit rate to Megabits per second (Mbps)
bitRateMbps = bitRateBps / (1024 * 1024); % 1 Mbps = 1024 * 1024 bps

Hope it helps!