Error-resilient schemes for efficient transmission of Embedded Wavelet Coded Images

The reliable transmission of compressed images across noisy transmission channels and networks prone to packet losses is considered. The problem is viewed from a source coding perspective, where the main constraints are maximum coding efficiency and minimum redundancy. Error-resilient mechanisms are incorporated into wavelet-based image encoding schemes to obtain robust data streams that withstand significant bit errors and packet losses. The robust encoder requires no additional redundancy and shows coding improvements of 0.5-1.5 dB in SNR values over other similar methods. Redundant sets of wavelet coefficients generated by overcomplete discrete wavelet transform are used as side information to improve error-resilience at high packet loss rates. The implementations are flexible and can be easily adapted to any type of transmission channel with different network parameters.