Audio Compression and Coding

FLAC (Free Lossless Audio Codec) is a lossless audio compression format that preserves the original audio quality.

Lossy compression techniques introduce distortion in the audio signal to achieve higher compression ratios, while lossless compression techniques do not introduce distortion.

AAC (Advanced Audio Coding) is a perceptual audio coding algorithm that uses psychoacoustic principles to remove inaudible information from the audio signal.

CD-quality audio files have a bitrate of 1411.2 kbps, which corresponds to a sampling rate of 44.1 kHz and a bit depth of 16 bits.

MP3 (MPEG-1 Audio Layer 3) is a variable bitrate audio coding algorithm that adjusts the bitrate based on the complexity of the audio signal.

Lossy audio compression techniques achieve smaller file sizes compared to lossless techniques, while still maintaining acceptable audio quality.

WMA (Windows Media Audio) is a hybrid audio coding algorithm that combines lossy and lossless compression techniques.

Lossy audio compression techniques introduce distortion in the audio signal, which can result in loss of audio quality.

Companding is a non-linear quantization technique that uses a logarithmic function to compress the audio signal before quantization.

Perceptual audio coding algorithms achieve smaller file sizes compared to non-perceptual algorithms, while still maintaining acceptable audio quality.

Mel-frequency Cepstral Coefficients (MFCCs) are a psychoacoustic model that is used to represent the human auditory perception of sound.

Perceptual audio coding algorithms are more computationally complex compared to non-perceptual algorithms.

Discrete Cosine Transform (DCT), Discrete Fourier Transform (DFT), and Wavelet Transform are all transform coding techniques used in audio compression.

Transform coding techniques achieve smaller file sizes compared to non-transform coding techniques, while still maintaining acceptable audio quality.

Tree-Structured Vector Quantization (TSVQ) is a vector quantization technique that uses a tree structure to represent the codebook.