This paper demonstrates the need of and objectives for new error criteria for mobile broadcasting and the problems related to defining numerical error criteria for video services. The current error criterion used in digital video broadcasting to handheld (DVB-H), namely, multiprotocol encapsulation forward error correction (MPE-FEC) frame error ratio (MFER) 5%, was defined to enable instantaneous measurements but is not accurate enough for detailed simulations or postprocessing of measured data. To enable accurate transmission system design, parameter optimization, and performance evaluation, it is necessary to define new practical criteria for measuring the impact of transmission errors. The ambiguity of the MFER criterion is studied, and results for other conventional error criteria are derived from transmission system simulations and objective video quality measurements. The outcomes are compared to results from studies on subjective audiovisual quality. Guidelines are given on the next steps of developing new objective criteria for wireless and mobile video. It is suggested that subjective tests are performed based on the average length and average amount of errors derived from verified mobile radio channel models.
This paper investigates the IP (Internet Protocol) level error statistics and their effects on the application layer for audio and video services transmitted over a DVB-H (Digital Video Broadcasting -Handheld) system. IP is the interface between the transmission system and applications in most Mobile TV systems. Understanding IP level error behavior and its effects to compressed audiovisual material forms an important foundation for the mapping of transmission system performance to subjectively perceived audiovisual quality. In this paper, simulation results and IP packet error statistics for typical parameter sets for audiovisual services transmitted over conventional MobileTV channels are presented.
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