Question: In the Enhanced Voice Services (EVS) codec's PVQ (Perceptual Vector Quantization) technique, what is the primary factor influencing the initial distribution of a minimum amount of bits across the selected bands after determining the number of bands for quantization?
Option 1: Emphasis on low frequencies
Option 2: Equal distribution across all selected bands
Option 3: Priority to bands with higher noise levels
Option 4: Allocation based solely on the bit rate
Explanation: The correct answer is Option 1 because, according to the PVQ bit allocation process in EVS, after deciding on the number of bands for quantization, a minimum amount of bits is spread over these bands with an emphasis on the low frequencies. This approach is likely due to the human auditory system's greater sensitivity to lower frequency ranges, thus prioritizing them for better voice quality perception.