Question: In the Complex Low Delay Filter Bank (CLDFB) synthesis stage, what determines the sample rate of the reconstructed output signal?
Option 1: The type of windowing function applied to the demodulated vector
Option 2: The number of coefficients initialized for the analysis stage
Option 3: The number of bands used for the CLDFB synthesis stage
Option 4: The frequency of the overlap-add operations performed
Explanation: The correct answer is Option 3 because, according to the principles of filter bank design and the specifics of the CLDFB synthesis stage, the sample rate of the reconstructed output signal is directly influenced by how many bands are utilized during the synthesis process. This is a common principle in multi-rate signal processing where the number of sub-bands (or channels) in analysis or synthesis can alter the effective sampling rate of the processed signal. The other options do not directly impact the sample rate of the reconstructed output in the context of CLDFB synthesis.