A robust image vector quantization transmission system with an embedded degradation control mechanism

This paper proposes a vector quantization (VQ) transmission system that both has a mechanism for detection and correction quantization artifacts, and is channel-robust, in the sense that provides some degree of immunity against channel noise. The basic idea of the source coding scheme is to treat separately the blocks whose direct quantization generates a high level of degradation. They are reconstructed via an interpolating procedure that exploits the spatial correlation in the image. The protection against the channel noise is provided by an appropriate index assignment (IA) procedure, based on Hadamard transform.