Multiple Description Source Coding for Cognitive Radio Systems
Multiple Description Coding (MDC) is applied for delay-sensitive data traffic to alleviate interruptions caused by primary users in cognitive radio systems. For Gaussian source, a simplified algorithm for the exhaustive search of optimal distortions and rates is proposed based on the achievable region of coding rates and delay requirement. For practical real-time image coding, source splitting is applied to generate multiple descriptions. When there is a single channel, two successive descriptions are composed of large and small coefficients in Discrete Cosine Transform (DCT) domain, respectively.