A unified rate-distortion analysis framework for transform coding
IEEE Transactions on Circuits and Systems for Video Technology
A method of estimating coding PSNR using quantized DCT coefficients
IEEE Transactions on Circuits and Systems for Video Technology
Postprocessing MPEG based on estimated quantization parameters
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Hardware implementation of MPEG analysis and deblocking for video enhancement
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Estimating QP and motion vectors in H.264/AVC video from decoded pixels
Proceedings of the 2nd ACM workshop on Multimedia in forensics, security and intelligence
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MPEG coded video may be processed for quality assessment or postprocessed to reduce coding artifacts or transcoded. Utilizing information about the MPEG stream may be useful for these tasks. This paper deals with estimatingMPEG parameter information from the decoded video stream without access to the MPEG stream. This may be used in systems and applications where the coded stream is not accessible. Detection of MPEG I-frames and DCT (Discrete Cosine Transform) block size is presented. For the I-frames, the quantization parameters are estimated. Combining these with statistics of the reconstructed DCT coefficients, the PSNR is estimated from the decoded video without reference images. Tests on decoded fixed rate MPEG2 sequences demonstrate perfect detection rates and good performance of the PSNR estimation.