![]() At the same time, ATSC developed the advanced common application platform (ACAP) and later released its ATSC 3.0 interactive content standard. DVB-T is traditionally associated with multimedia home platform (MHP) and, more recently, hybrid broadcast broadband TV (HbbTV). Consequently, receivers in those regions should conform to specific DTV standards, usually accomplished with commercial testing systems or proprietary approaches.īesides, DTV standards often include middleware specifications. In addition, most of South America chose its variant known as ISDB-T version B (ISDB-Tī) or Brazilian digital television system (SBTVD), as a substitute to PAL, SECAM and NTSC. Japan adopted the standard named integrated services digital broadcasting - terrestrial (ISDB-T). North America moved from national television system committee (NTSC) to advanced television system committee (ATSC), now being updated to ATSC 3.0. In Europe, Séquentiel couleur à mémoire (SECAM) and phase alternating line (PAL) were replaced by digital video broadcasting terrestrial (DVB-T) and, more recently, DVB-T second-generation (DVB-T2). Over the last decades, many countries migrated from analogue TV systems to digital TV (DTV) standards. Experiments using such a fuzzing scheme have shown its efficacy and provided opportunities to improve robustness regarding commercial DTV platforms. They are created with guided fuzzing based on real problems, protocol structure, and system architecture to provide resources for handling them, thus ensuring correct operation. In particular, devices are submitted to unforeseen conditions and incorrect configuration. This error scenario is addressed here, and a novel receiver robustness evaluation methodology based on non-compliance tests using grammar-based guided fuzzing is proposed. ![]() Indeed, everything may happen since any deviation can incur problems, depending on each specific implementation. ![]() ![]() Moreover, the way those problems are usually introduced in DTV signals presents some randomness, but with known restrictions given by the underlying transport protocols used in DTV systems, which resembles fuzzing techniques. Since most receivers were not designed to operate under such conditions, malfunction and incorrect behaviour may be noticed, often recognized as field problems, thus compromising a given system's operation. However, many broadcasters inadvertently misconfigure their devices and transmit the wrong information concerning data structures and protocol format. Digital TV (DTV) receivers are usually submitted to testing systems for conformity and robustness assessment, and their approval implies correct operation under a given DTV specification protocol. ![]()
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