Mis on RVQ (jääkivõttelise vektorkvantimise) helikodekis?

Residual Vector Quantization (RVQ) is a quantization method used in audio codecs for efficient compression of audio signals.

The idea of RVQ is to progressively approximate the original vector (for example, an audio frame) using multiple levels of quantization:

1. At the first level, the original vector is approximated by the nearest vector from the first codebook, and the residual is calculated — the difference between the original vector and this approximation.

2. At the second level, the residual is quantized using the second codebook.

3. This process is repeated for several levels, each time quantizing the residual of the previous approximation.

This allows for more accurate and efficient encoding of audio data, as each level reduces the quantization error, and the overall representation becomes compact.

RVQ is often used in audio codecs to balance quality and bitrate, ensuring good sound quality during compression.