Question: In the context of Enhanced Voice Services (EVS) codec, what is the primary purpose of applying the Levinson-Durbin algorithm to the autocorrelation of windowed speech in Linear Prediction (LP) analysis?
Option 1: To directly quantize the speech signal for efficient transmission
Option 2: To transform the speech signal into the frequency domain for easier analysis
Option 3: To determine the optimal window size for speech processing
Option 4: To convert autocorrelation values to LP coefficients for synthesis filter construction
Explanation: The Levinson-Durbin algorithm is specifically used in Linear Prediction (LP) analysis of speech coding (like in EVS codec) to efficiently convert the autocorrelation of windowed speech into Linear Prediction coefficients, crucial for constructing the synthesis filter that models the vocal tract, generating high-quality synthesized speech at the decoder.