MP3 format is used to reduce the amount of data necessary to represent the audio file. It tricks the listener's ear so it sounds like the original file being played although it has been compressed. This audio data compression changes the frequency of audio files so the listener cannot detect the file has been changed/compressed. There is a trade-off when using an MP3 between size of file and sound quality. The larger the file, the better the sound quality.
AAC (Advanced Audio Coding) is the "newer" form of MP3 that is said to have better sound quality with smaller bit rates. Apple uses AAC as their default format for audio files. This is probably because AAC has significant improvements from the MP3 format. AAC has better handling of larger audio frequencies as well as more flexibility to design codes than MP3. AAC supports up to 48 channels while MP3 supports up to only 2. AAC has a more efficient filtering technique (filterbank) and a higher coding efficiency. Overall, AAC is viewed as a successor of the MP3 format. Apple is always using the fastest technology available, so it makes sense Apple would use the newest version of audio file format.
No comments:
Post a Comment