Variable bitrate vs constant bitrate, what are the differences between them? What are the pros and cons of them respectively?

1. Variable Bitrate vs Constant Bitrate: A Comparative Analysis in Audio
Encoding
In the realm of audio encoding, the choice between variable bitrate (VBR) and constant bitrate (CBR)
has long been a subject of debate and consideration. Each method has its own set of advantages and
disadvantages, catering to different use cases and priorities. In this article offered by MiniTool audio
converting application, we will delve into the differences between variable bitrate and constant
bitrate, explore their applications in the context of neural fields and OBS (Open Broadcaster
Software), and discuss the implications of variable bitrate encoding in the popular MP3 format.
Variable Bitrate vs Constant Bitrate: Overview
Variable bitrate encoding, as the name suggests, allows for fluctuations in the bitrate of the encoded
audio stream. This means that the bitrate dynamically adjusts based on the complexity of the audio
content. During portions of the audio with higher complexity, such as music with intricate
instrumentation, the bitrate can increase to capture the details accurately. Conversely, during
simpler passages, the bitrate can decrease, conserving file size without compromising perceptible
audio quality.
On the other hand, constant bitrate encoding utilizes a fixed bitrate throughout the entire audio
stream. This results in a predictable file size, making it ideal for applications that require a specific
file size or bit rate consistency. However, since the complexity of the audio content remains
unaccounted for, constant bit rate encoding may allocate excessive bits for simpler segments,
resulting in inefficient utilization of storage space.

2. Variable Bitrate Neural Fields
When it comes to neural fields, which encompass the representation and processing of neural data,
variable bit rate encoding plays a crucial role. Neural fields often contain diverse information, with
some parts requiring higher fidelity than others. By employing variable bitrate encoding, researchers
and practitioners can efficiently allocate bits to represent crucial aspects of the neural data while
utilizing fewer bits for less critical components. This flexibility allows for more efficient data storage
and transmission, facilitating advancements in fields like neuroscience and artificial intelligence.
Also read: What Is Video Bitrate? 4 Things You Need to Know
OBS Variable Bitrate
Moreover, variable bitrate encoding finds utility in the domain of Open Broadcaster Software (OBS),
a popular tool for live streaming and recording. OBS allows streamers to adjust the bitrate based on
their available bandwidth and the desired streaming quality. In situations where network conditions
fluctuate, variable bitrate encoding adapts dynamically to maintain optimal audio quality and
minimize buffering or artifacts, ensuring a smooth streaming experience for viewers.
Variable Bitrate vs Constant MP3
In the context of the widely used MP3 audio format, variable bitrate encoding offers distinct
advantages over constant bitrate. MP3 files encoded with variable bitrate achieve higher audio
quality compared to those encoded with a constant bitrate. By allocating more bits to complex
sections of the audio and fewer bits to simpler portions, variable bitrate encoding maximizes the
efficiency of data representation while preserving perceptible fidelity. This is particularly relevant for
music with varying levels of complexity, where constant bitrate encoding may result in an
unnecessary allocation of bits for simpler sections.
How to Change Audio Bitrate?
If you are not satisfied with the current bitrates of your videos, you can alter them with a
professional and quick bitrate changer like MiniTool Video Converter, which can easily convert your
audio files from one bitrate to another in a few seconds.
Step 1. Download and install MiniTool Video Converter on your Windows computer.
Step 2. Open this program and enter its main user interface (UI).
Step 3. Under the default Converting subtab of the Video Convert tab, click Add or Drag files here to
start conversion option in the center of the window to upload your target audio or songs.

3. Step 4. Click on the settings icon for the conversion destination media file to trigger the
corresponding setup.

4. Step 5. In the new window, switch to the Audio tab from the top menu, choose an audio file format
like MP3 from the left submenu, and pick up an audio quality option in the right section. You can
further personalize the parameters of the selected audio format option or directly click Create
Custom at the bottom of the window.

5. Step 6. In the next popup, you are able to change the encoder, channel, sample rate, as well as
bitrate of the audio file. Once done, click the Create button to save the changes.

6. Step 7. You will be directed back to the upper-level window, there, don’t forget to select your
customized audio format and click the Convert button to start the process.

7. Wait until the process finishes. Then, you have got the bitrate of the audio file adjusted to your
favorite one.
Constant Bitrate vs Variable Bitrate: Conclusion
The choice between constant bitrate and variable bitrate encoding depends on the specific
requirements and priorities of the audio application. While constant bitrate offers predictability and
consistency, variable bitrate encoding excels in situations where efficient storage, adaptive
streaming, or capturing the nuances of complex audio content are essential. As technology
continues to advance, variable bitrate encoding is likely to play an increasingly significant role in
various domains, enabling optimal representation and transmission of audio data.