A data hiding approach for correcting errors in H.263 videotransmitted over a noisy channel

摘要

The performance of syntax-based error detection in the frameworkof H.263 video transmission is not sufficient to detect errors reliably,calling for the adoption of more effective error detection techniques. Anew technique, based on data hiding concepts, is proposed here toincrease the error detection rate in H.263 video sequences transmittedover error-prone communication channels. Some information is embeddedinto the compressed H.263 video stream aimed at highlighting the regionsof the frame corrupted by transmission errors. The method preserves theimage quality and maintains the original bit rate, without anymodifications of the H.263 standard. The proposed approach allows one toavoid the transmission overhead typical of FEC-based or header-basederror detection algorithms, and the extra computational burden peculiarto image analysis-based techniques, achieving better results withrespect to syntax-based error detection, thanks to the use of sideinformation at the decoder