Title :
A constant subjective quality MPEG encoder
Author :
Lin, Fu-Huei ; Mersereau, Russell M.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
We present an video objective quality measure which has good correlation with subjective tests. We then introduce the objective measure into the design of an MPEG encoder. The new MPEG encoder extracts four features (bit rate, a feature that measures blockiness, one that measures false edges, and one that measures blurred edges) from the input and output video sequences and feeds those features into a four-layered back-propagation neural network which has been trained by subjective testing. Then the system uses a simple feedback technique to adjust the GOP (group of pictures) bit-rate to achieve a constant subjective quality output video sequence
Keywords :
backpropagation; code standards; correlation methods; feature extraction; image sequences; multilayer perceptrons; telecommunication standards; video coding; MPEG encoder; bit rate; blockiness measure; blurred edges; constant subjective quality; correlation; false edges; feature extraction; feedback technique; four-layered back-propagation neural network; group of pictures; input video sequence; output video sequence; subjective testing; subjective tests; video objective quality measure; Bit rate; Distortion measurement; Feature extraction; Feeds; Humans; Image quality; Neural networks; Neurofeedback; Nonlinear distortion; Output feedback; Testing; Video sequences; Visual perception;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location :
Detroit, MI
Print_ISBN :
0-7803-2431-5
DOI :
10.1109/ICASSP.1995.479907
