Title :
MPEG2 video parameter and no reference PSNR estimation
Author :
Li, Huiying ; Forchhammer, Søren
Author_Institution :
Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
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 estimating MPEG 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.
Keywords :
decoding; discrete cosine transforms; image reconstruction; parameter estimation; statistical analysis; video coding; video streaming; DCT; I-frame detection; MPEG2 video parameter; PSNR estimation; decoded video stream; discrete cosine transform; image reconstruction; parameter information estimation; reference image; statistical analysis; video coding; Decoding; Discrete cosine transforms; Image reconstruction; PSNR; Parameter estimation; Quality assessment; Quantization; Statistics; Streaming media; Testing; I-frame detection; MPEG; No reference PSNR; parameter estimation; quantization;
Conference_Titel :
Picture Coding Symposium, 2009. PCS 2009
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-4593-6
Electronic_ISBN :
978-1-4244-4594-3
DOI :
10.1109/PCS.2009.5167426