Objective quality assessment of MPEG-2 video streams by using CBP neural networks
Tóm tắt
The increasing use of compression standards in broadcasting digital TV has raised the need for established criteria to measure perceived quality. Novel methods must take into account the specific artifacts introduced by digital compression techniques. This paper presents a methodology using circular backpropagation (CBP) neural networks for the objective quality assessment of motion picture expert group (MPEG) video streams. Objective features are continuously extracted from compressed video streams on a frame-by-frame basis; they feed the CBP network estimating the corresponding perceived quality. The resulting adaptive modeling of subjective perception supports a real-time system for monitoring displayed video quality. The overall system mimics perception but does not require an analytical model of the underlying physical phenomenon. The ability to process compressed video streams represents a crucial advantage over existing approaches, as avoiding the decoding process greatly enhances the system's real-time performance. Experimental evidence confirmed the approach validity. The system was tested on real test videos; they included different contents ranging from fiction to sport. The neural model provided a satisfactory, continuous-time approximation for actual scoring curves, which was validated statistically in terms of confidence analysis. As expected, videos with slow-varying contents such as fiction featured the best performances.
Từ khóa
#Quality assessment #Streaming media #Neural networks #Video compression #Transform coding #Real time systems #System testing #Measurement standards #Digital video broadcasting #TV broadcastingTài liệu tham khảo
mood, 1974, Introduction to the Theory of Statistics
10.1016/S0925-2312(97)00080-5
10.1109/82.769777
10.1109/72.914531
10.1117/12.371210
10.1109/76.875525
10.1049/el:20000847
10.1016/S0923-5965(98)00014-9
rumelhart, 1986, Parallel Distributed Processing, 10.7551/mitpress/5236.001.0001
10.1109/72.554194
vapnik, 1998, Statist Learning Theory
10.1109/72.774275
10.1007/BF00332914
1996, Information Technology— Generic Coding of Moving Pictures and Associated Audio Video Information Video
10.5594/J04353
10.1049/cp:19950676
schiffman, 1996, Sensation and Perception— An Integrated Approach
zou, 1997, methods for evaluation of digital television picture quality, IEEE Broadcast Tech Soc — 4th Meet G-2 1 6 Audio Video Techniques Committee G-2 1 Compression Processing Subcommittee
10.5594/J06425
voran, 1992, the development and evaluation of an objective video quality assessment system that emulates human viewing panels, Broadcasting Convention 1992 IBC International, 504
10.1109/72.238311
10.5594/J04308
10.5594/J06401
10.1109/11.664028
10.5594/J04354
2000, Methodology for the Subjective Assessment of the Quality of Television Pictures
1996, Introduction of a New Method for Single Stimulus Continuous Quality Evaluation (SSCQE)
10.1109/T-C.1974.224051
joliffe, 1986, Principal Component Analysis, 10.1007/978-1-4757-1904-8
10.1016/S0923-5965(99)00061-2
10.1080/01621459.1987.10478427
10.5594/J04356
10.5594/J15812