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What is the audio bit rate?

Relationship between “bit depth” and “sample rate” and sound quality

Bit rate is one of the factors that determines the quality of a video job.

Among them, the audio bit rate determines the end of the audio. Understanding the bit rate will allow you to control the sound quality and create higher quality audio.

So on this occasion, I will explain bit depth and sample rate, which are essential to talk about sound quality.

What is a bit rate?
What is a bit rate?
■ Bit rate represents high quality

Bit rate is a numerical value that represents the amount of information in the data, and the height of the bit rate is proportional to the quality of the data.

By looking at the bit rate, you can see how much data is packed in one second. Generally, the higher the bit rate, the higher the sound quality and the more realistic the sound and video are.

■ Audio bit rate and video bit rate

In the case of video, the bit rate is divided into two types, video and audio, and the overall quality of the video is determined by the height of each bit rate.

The “video data rate” shown in the video properties is the video bit rate and the bit rate assigned to “audio” is the audio bit rate. The “total bit rate” is the total of the two types of bit rates, video and audio, and is the bit rate of all video.

However, high bit rate audio is not always good sound. This is because if the quality of the original audio data or the equipment used for recording is poor, poor quality audio will be played. For example, if the original voice contains noise, the noise part will be reproduced realistically and the voice will be difficult to hear. Similarly, if the video bit rate is low, the movement will be choppy and unnatural, or the video will be uneven.

What is the bit depth that determines the sound quality?
What is the bit depth that determines the sound quality?
The bit rate is calculated by multiplying the two factors of bit depth and sample rate. Bit depth represents the amount of data per divided sample and is an element that affects the quality and expressiveness of the sound.

The sample rate is the finely divided horizontal axis and the bit depth is the one that overlaps the vertical axis. By providing a large amount of data (bit depth) to each sample, it is possible to create finer and more accurate audio data.

Bit depth is the precision of each image in animation production. The higher the bit depth, the more expressive the sound and effects will be, and the higher the sound quality will feel.

What is the sample rate that determines the smoothness?
Of the bit rates that determine audio quality, the sample rate is an element that represents the number of data divisions per second on the horizontal axis. It shows how many tens of thousands of data are divided per second, and the greater the number of divisions, the higher the sound reproducibility and sound quality.

It is even easier to understand if you consider it a mechanism similar to animation production. The more images you use per second, the smoother your character will move, and the higher the sample rate (the number of data divisions), the smoother the sound. Also, the amount of data increases according to the size of the sample rate.

in conclusion
To improve sound quality, it is important to increase the audio bit rate. The audio bit rate is determined by two factors: the bit depth, which determines the expressiveness of the sound, and the sampling rate, which determines the smoothness of the sound.

However, it should be noted that the higher the audio bit rate, the more beautiful the audio will be and it will also be affected by the original sound source. If you want to create high-quality data from the moment of recording, why not ask a production company that has high-quality recording equipment?

I think a lot of people are concerned about the balance between capacity and sound quality when it comes to a computer-mounted audio system. Professional engineers and mixers will come up with the best balance, so don’t hesitate to contact us on these points.

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What is a bit rate?

What is the relationship between image quality and sound quality?

Video conversion
Video video format conversion

When you burn video to DVD, rip DVD, or use video-related software, you will often hear the word “bit rate”. What is a bit rate? What is the relationship between video quality and sound quality? This article describes the relationship between bit rate and video quality and sound quality.

Part 1. What is a bit rate?
Part 2. Relationship between bit rate and image quality / sound quality
Part 3. Adjust video bitrate with Leawo Video Pro

Part 1. What is bit rate?
Bit rate is the number of bits transferred or processed per unit of time in telecommunications and computing. Simply put, it is the amount of data that can be sent and received per second. It can also be called bit rate. It is represented as the variable R.

In digital multimedia, bit rate often refers to the number of bits used per unit of playback time to represent continuous media such as audio and video after source encoding (data compression). The media file encoding bit rate is the size of the media file in bytes divided by the playback time (seconds) of the recording multiplied by 8.

In digital multimedia, the bit rate represents the amount of information recorded per unit of time. The bit rate depends on several factors.

The source material can be sampled at different frequencies.
The sample can use a different number of bits.
The data can be encoded using different schemes.
Information can be digitally compressed with different algorithms or different degrees.

Part 2. Relationship between bit rate and image quality / sound quality
Simply put, the higher the bit rate, the better the picture and sound quality.

The sum of the video and audio bit rates is called the oval bit rate (total bit rate). Oval bit rate = video bit rate + audio bit rate

The higher the bitrate, the better the picture and sound quality, but it consumes a lot of net bandwidth and requires PC specs. Here are some points about bit rates.

What is video coding? Explain how to generate video distribution and basic knowledge files.

What is the reason for the
coding?

What are the four points to take into account before coding work? Is
important to perform the coding according to the purpose of the video.

Recently, many people publish videos in video distribution services such as YouTube. Have you ever heard the word encoding in such a situation?
The coding refers to compressing and encrypting format data, such as video and audio, according to certain rules, and converting them to another data format.
If a video file taken with a video camera is distributed online as it is through a video distribution service, the amount of data will be too large and it can be difficult to see it comfortably depending on the viewer’s Internet environment.
When coding the video he recorded and created, he can turn it into adequate data for his purpose and purpose, and he can see it comfortably.
On this occasion, for those who want to publish a video, I will explain the importance and necessary of the coding work.

What is the reason for coding?
Coding is the conversion of signals and data according to certain rules. It mainly has the meaning of “coding”, “encrypted”, “data compression”, etc. Coding is a necessary task when creating a video. First, I will explain the reason for coding.

A video is like an animated book, and dozens of images per second are recorded, and the data is processed so that they seem to move when connecting them. The frame rate (FPS) indicates how many images are projected per second and, at 20 fps, it means that 20 frame frames per second are used.

Depending on how it records and creates the video, the value of the frame speed can increase, which makes it difficult to see it comfortably. The coders, which are hardware or software to convert data into several formats, are necessary for coding.

Coders are distributed abundantly and some programs can be downloaded free of charge. “XMedia Recode” and “Handbrake” are relatively well known as free software. Try it and find an encoder that is easy to use.

[Basic knowledge of video]

An easy-to-understand explanation of the differences between file formats and codecs!

Differences between video file formats and codecs

In this article, I will explain the difference between “file format” and video “codec” in an easy to understand way.

First of all, I don’t understand the meaning of “file format” and “codec”

Even such people can understand it without much thought.

To conclude first

File format (.mov / .mp4, etc.) → Video container
Codec (H264 / AIC, etc.) → Video compression method
It makes a big difference.

To summarize briefly, the codec is the method of compressing the file format.

There are many video file formats and codecs.

Even if the file format is the same, if the codec used is different, it may not be playable depending on the environment. Therefore, knowing these differences and types will be helpful when making or playing videos.

Come on ~

Table of Contents
Understand the file structure of videos
Featuring three main file formats
Quick time (.mov)
Windows Media Video (.wmv)
MP4 (.mp4)
Differences between file formats and codecs
resume
Understand the file structure of videos
First, let’s take a quick look at the structure of video files!

The file format of the video can be recognized by the “extension” when the video is placed on the desktop.

mov screenshot
By the way, this is a video file in “.mov” format.

There are several types of file formats (video containers), but the content is the same.

Video file structure
Video file structure Content
file format There are various formats such as “.mov”, “.mp4”, “.wmv” and “.avi” in terms of extension. Some file formats cannot be played depending on the type of terminal or PC.
Video data The visual part of the video file. Without this, the image will not be displayed on the screen. Due to the large volume of video data, it is almost always compressed.
Audio data Sound data. Without this, there will be no sound. Although the capacity is small compared to video data, it is often compressed as well.
Metadata Text data such as copyright information and shooting date and time.
Featuring three main file formats

I mentioned earlier that there are several types of “file formats” for videos.

If you know everything, you will lose motivation, which is why I will introduce three main video file formats.

Quick time (.mov)
It is a video file format created by Apple Inc. called Quick Time Movie.

You can play it with QuickTime Player on Mac or iTunes.

To play on Windows, you need to install the Windows version of QuickTime Player (free).

Orally, it is called a “mob file” or “M point or buoy”.

Windows Media Video (.wmv)
This is a video file created in Microsoft’s “Windows Media” format.

It can be played with Windows Media Player on Windows.

If you want to play it on Mac, you need to download a media player like LVC.

Taken by mouth, it is called “Double MV”.

MP4 (.mp4)
You have probably heard more about video files.

The reading is “MP4”.

This is the most widely used format.

You can play it with QuickTime Player on Mac, iTunes, and Windows Media Player on Windows.

It is also compatible with many mobile terminals.

Video Basics Part 2

There are two types of bit rates

Bit rate type
There are two types of bit rates.

Constant Bit Rate (CBR)
Variable Bit Rate (VBR)
Constant Bitrate keeps the set bitrate constant regardless of the video content.

An important feature is that the load on the playback device (PC or smartphone) is small, but since the pattern with violent movement becomes a block, it is necessary to set a relatively large bit rate.

In other words, the file size tends to be large.

On the other hand, variable bit rate is a method that automatically increases the bit rate for parts with complicated movements and reduces it for parts with little change, so the overall file size can be kept small.

Instead, the load on the playback device (PC or smartphone) will be high, so the movement may be choppy depending on the device.

Bit rate type Features
Constant Bit Rate (CBR) The
File size tends to be large, making it less burdensome for the playback device.
Variable Bit Rate (VBR)
The file size, which is a large burden on the playback equipment, can be kept small
Which is better depends on the application, but if the image quality is fixed, like Youtube, we recommend variable bit rate with high image quality and light file size.

He didn’t know the difference between the two when he was working. Let’s keep it in our head as knowledge.

Video Basics: What is Frame Rate?

Frame rate knowledge is essential for those who are just starting to record and edit videos!

The video appears to move “showing continuous still images one after another.” Right now, “frame rate (fps)” is the number of still images displayed per second.

It is easy to understand if you imagine a flip book.

Photos and videos feel different, but videos are a collection of photos.

The frame rate is expressed in the unit of “fps”.

This is an abbreviation for “Frame Per Second” and is the number of still images displayed per second.

Remember the general frame rate
Generally, movies are recorded at 24 fps and TV shows are recorded at 29.97 fps.

29.97fps is often downgraded to 30fps because the numbers are not sharp.

The camcorder was originally designed to record video for viewing on a television, so by default it records at the same 30fps as a television.

You can see that a movie has 24 photos per second / a TV has about 30 photos per second.

Frame rate (fps) Features
15 fps Single segment stream frame rate
30 (29.97) fps Domestic TV broadcasts and video cameras in general.
24 fps Frame rate used in movies
60 fps In recent video cameras, as a project with a definition higher than 30 fps, the number of cameras that can record and play back at 60 fps per second is increasing.
The higher the frame rate, the smoother the video will be, but it won’t be blurry and the video won’t be natural.

When exporting as video, there is no question that it should be set to 30 fps or 24 fps general.

Please note that if you edit a video recorded at 24fps to 30fps, you will end up with choppy video due to a lack of still images.

When recording a video → edit, be sure to check the camcorder’s settings (frame rate).

resume
that’s it! As a basic knowledge of video, I explained the difference between “bit rate” and “frame rate”.

The names are similar, but they are completely different.

By the way, what can you think about when video motion stutters

The bit rate is too high to keep up with the playback device’s processing.
The frame rate setting is too low
These two are possible.

There is no doubt that the bit rate and frame rate should be basically set according to the presets.

However, it is easy to fix it if you know the cause, such as when there is a problem playing the video.