Perceptual audio coding is a fascinating digital audio compression method that’s based on how we perceive sound – otherwise known as psychoacoustics. Essentially, it uses our understanding of the way we hear and process sound to compress audio files without sacrificing quality.
The technology is able to do this by removing quieter noises that most people wouldn’t notice anyway. For example, when multiple instruments are playing at once, the sounds from one instrument may appear to cancel out the sounds of another depending on the frequency and volume present at that one time. By removing these unnoticeable sounds, the audio still retains its high quality and creates a smaller file size.
Many formats of audio files use perceptual audio coding to compress files, including MP3 and AAC files. This technology has revolutionized digital audio, making it possible for us to easily and quickly share high-quality audio files over the internet.
What is psychoacoustics?
Psychoacoustics is the science of how humans perceive sound. This includes everything from how we identify different instruments to how we recognize speech.
What are some common audio file formats that use perceptual audio coding?
The most popular audio file formats that use perceptual audio coding include MP3 and AAC files.
Can perceptual audio coding be used for video files as well?
Yes, perceptual audio coding can be used for compressing audio in video files to make them smaller and more manageable.
The Bottom Line
Perceptual audio coding is a groundbreaking technology that relies on our understanding of psychoacoustics to compress digital audio files. By removing sounds that are unlikely to be noticed by human ears, we can create smaller and high-quality digital audio files that are perfect for sharing over the internet.