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What is the AAC format? How to Easily Convert MP4 Video to AAC


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What is the AAC format? How to Easily Convert MP4 Video to AAC

AAC

Q1: “I want to extract audio data from .mp4 video, but I am wondering what output format to use, MP3 or AAC, can you tell me the difference between MP3 and AAC?”

AAC Vs. MP3

Q2: “I am looking for a tool that can convert video files to music format. There are many files that I want to convert, and if possible, please show me a tool that can quickly convert or batch convert. I would be happy if I could

There are times when it is enough to enjoy music, not as a video. For example, when you watch the music video of your favorite singer, you want to enjoy the singing voice itself instead of the video.

Also, if you turn the video into music, you can easily listen to music even with your smartphone in your pocket, and the file size will be small.

However, to convert video files to music format, you need tools that can edit media files, but today there are not so many tools that have fast conversion speed on the Internet.

This time, I will explain the difference between AAC and MP3.

What is AAC
AAC (Advanced Audio Coding) is one of the technologies for compressing audio data and is a container format for storing audio data, which was developed in 1997 as a successor to MP3.

It is mainly used as a standard format for Apple products such as iPod and iPhone, and it is not compatible with Windows compatible software, making it difficult to play and edit on those devices.

Also, there are MPEG-2 AAC and MPEG-4 AAC in the AAC format, but the latest MPEG-4 AAC is often used.

The unique features of AAC are that it supports sample rates up to 96 kHz, supports up to 48 channels, and has a fairly high data compression efficiency.

Here I will talk a bit about the difference between MPEG-2 AAC and MPEG-4 AAC.

MPEG (Moving Picture Experts Group) is a group that establishes the standards used when compressing multimedia data such as video, audio, and text. Both MPEG-2 AAC and MPEG-4 AAC are audio data compression methods specified by MPEG.

MPEG-2 AAC A popular format for digital terrestrial broadcasting, it is considerably inferior to MPEG-4 in terms of compression efficiency.

It is a widely used music standard in portable devices such as MPEG-4 AAC digital audio players and digital cameras. The compression efficiency is significantly improved from 2, and the compressed music file size is also smaller.

Difference between AAC and MP3
In this part, I will explain the difference between “AAC” and “MP3”, which are often compared to each other.

Either also “lossy compression in the form of” as it is not returned based on sound quality. When compressing the sound source at once it is a “lossy compression” characteristic.

By the way, in addition to “lossy compression”, there are “lossy compression (representative: FLAC, ALAC)” and “uncompressed (representative: AIFF, AAC)” as music compression formats.

Both AAC and MP3 can compress the sound source data to about 1/10 of the original size with some deterioration in sound quality, but in terms of compression ratio, AAC is about 1.4 times higher than MP3. This means that AAC compressed files are smaller in size than MP3 files.

Therefore, for the same file size, AAC has higher sound quality than MP3, while for the same sound quality, AAC file is smaller than MP3.

However, from a bit rate point of view, if it is 128 kbps or less, AAC is by far the highest sound quality, but if it exceeds 198 kbps, MP3 will have a higher sound quality. .

PS: Bitrate is a numerical value that indicates how much audio data is packed during compression. The higher the number, the less audio data will be deleted and the higher the sound quality, but the larger the compressed file size.


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AAC, all about the AAC format

AAC Format

What is AAC? AAC is short for Advanced Audio Coding.

This makes AAC an extremely compressed audio file. This is to save storage space. And this is achieved by dispensing with frequencies in an AAC file that are imperceptible to the human ear anyway. We speak here of the so-called audio codecs.

AAC

In this way, the AAC file works exactly the same as the MP3: in both cases, the goal is to reduce the amount of data so that it can be transferred or saved more quickly. AAC versus MP3, which is better? The AAC format does not exist that long as MP3. But does that automatically mean that the newest version is the best?

Basically, it can be said that AAC allows stronger compression with better sound quality compared to MP3. The AAC file achieves higher quality standards through error correction algorithms. Assuming the same sound output, the AAC file needs three-quarters of the storage space of an MP3 file.

AAC occupies more and more the space that MP3 files occupy. This means that more and more Internet radios are also using AAC transmissions. Several other music websites also see this audio compression as the model of the future. In addition to the standard format, many MP3 players are also designed for AAC files.

In addition, AAC formats appear in iTunes, are used on iPhone, iPad and iPod and are compatible with PlayStation and oriented to Nintendo. Playing AAC format You can play the AAC format with a standard audio player.

Common file extensions for AAC files are .acc, .mp4, .m4a, .m4p, and .m4v. Convert AAC Format If you don’t have any programs on your Windows or Mac computer that can be used to play AAC files, you can convert individual files.

You can access various offers. You can create a WAV file, a WMA file or an MP3 file from the AAC file. Is it recommended to convert the files to another format? Although it is always possible to change the file being played so that it can be listened to with a player on the mobile device or computer, this is not necessarily advisable.

Every file format conversion is accompanied by a loss of quality: regardless of whether you convert an AAC file to MP3 format or play the MP3 file as an AAC file, the audio quality suffers. Therefore, you should only do this in exceptional cases, for example if you do not have a suitable playback device or program.

Tones that the human ear cannot perceive are considered unnecessary for sound and can be eliminated. In addition to the inaudible frequencies, this means redundant sounds that are produced when they overlap.

ACC files score with high sound standards. This is also a reason why Apple’s iTunes relies on AAC files. You can also provide copy protection for files. This prevents uncontrolled distribution of sound files.