Multiple Description Spherical Quantization of Sinusoidal Parameters with Repetition Coding of the Amplitudes

Recently, multiple description spherical trellis-coded quantization (MDSTCQ) for quantization of sinusoidal parameters
was proposed, which suffered from a suboptimal implementation. Therefore, we propose the multiple description spherical quantization with repetition coding of the amplitudes (MDSQRA) scheme. Here, we apply repetition coding to the amplitudes, whereas the phases and the frequencies are coded using multiple description quantization. We measure the relation between the expected perceptual distortions for the two quantization schemes, which shows that MDSQRA outperforms MDSTCQ for most packet-loss probabilities. Also, we measure the perceptual distortion obtained when applying MDSQRA on synthetic data and show that it matches the expected perceptual distortion. Furthermore, due to MDSTCQs suboptimal implementation, MDSQRA outperforms MDSTCQ in terms of measured perceptual distortion even at packet-loss probabilities where the expected perceptual distortion was lowest for MDSTCQ.