Robust 3-D subband video coder

In this paper we explain our results on development of a robust video coder. The coder consists of 3-D subband filtering in the first stage, an optimized scalar quantization (SQ) of lowest tempo-spatial frequency subband, and a pyramid vector quantization (PVQ) for high frequency subbands. To increase robustness to noise productive enumeration used for PVQ. Also with a phase scrambling the distribution of lowest tempo-spatial band changed to Gaussian which results in a better SQ coding gain for this band. The output indices of SQ were sent using a folded binary code to improve noise robustness. Results show that at high bit-error rate (5x10(-3)) the coder peak signal to noise ratio drop maximum 5.3 dB.