Abstract
We study an approach that applied the digital watermarking for the MPEG-4 bitstream error detection enhancement in video coding. There are some conventional error detection methods, such as the syntax violation detection in the decoding process and the method based on the DCT (Discrete Cosine Transform) coefficient features embedding in the DCT block. However they are not a conclusive one yet. This paper presents a new scheme which is much more practical than the conventional one. In the encoder, some features are extracted from the macroblock headers, motion vectors, and DCT coefficients, which are embedded in the quantized DCT coefficients as the digital watermarks. The decoder performs the accurate error detection through the watermark extraction. Simulation results demonstrate that the error detection ability of the proposed approach can be significantly improved, and that digital watermark embedding incurs little degradation to the picture quality.
