What is Audio Encoding?

Audio encoding is a technique used for encoding scheme digital audio files. This technology can be used for coding audio files at medium to high bit rates. Advanced audio coding is designed to be the logical successor to MP3 (ISO/MPEG Audio Layer -3) and can offer better sound quality than its predecessor at the same bit rate.

Encoding digital audio requires five major steps. First, Modified Discrete Cosine Transform (MDCT) converts the signal from time-domain to frequency domain. Filter banks are used to convert an exact number of time samples into frequency samples.

Second, the frequency domain is quantized using a psychoacoustic model and then encoded. Third, appropriate internal correction codes are applied. Fourth, the signal is stacked or transmitted. Finally, the Luhn Mod N Algorithm is used for each frame to avoid sample corruption.