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Nowadays, Bluetooth Low Energy (BLE) technology has a great attention in the field of wireless localization techniques, especially in the case of indoor scenarios. Study presented in this paper explores BLE localization performance in indoor scenarios based on a received signal strength (RSS). Firstly, we present a Ray-Launching based application to emulate BLE radio frequency (RF) signal propagation...
This paper presents results from the study of co-existence between second generation digital video broadcasting terrestrial-lite (DVB-T2-Lite) and Long-Term Evolution (LTE) downlink networks in a shared radio frequency (RF) band. Partial overlapping coexistence scenarios are considered. A laboratory measurement testbed is used to measure the impact of interfering LTE system on DVB-T2-Lite system....
Nowadays, there are many kinds of technologies to provide multimedia TV content in different formats and picture quality. Three-dimensional (3D) video is one of the next generation TV services with specific features from the video image quality point of view. Naturally, efficient compression tools enabling significant bit rate reduction to ease 3D video distribution are an integral part of any practical...
In the last decade, fulfilling the growing users’ expectations on the quality of provided multimedia services is one of the biggest challenges for different wireless communication systems. However, many times, different kinds of wireless systems can operate in the same (shared) frequency band. Such coexistence generally negatively affects the performance of the systems colliding. This is especially...
The multiple-input single-output (MISO) technique is definitely one of the most perspective innovations which has been adapted for the second generation terrestrial DVB-T2 standard. Compared to the single-input single-output (SISO) technique it can reduce destructive interferences and improved the coverage of Single Frequency Networks. The main goal of this paper is to explore the DVB-T2 performance...
The main purpose of this paper is to explore the influence of Long-Term Evolution (LTE) system (as interfering) on the Digital Video Broadcasting-Terrestrial (DVB-T) system (as victim) at different coexistence scenarios. Three coexistence scenarios are considered, namely: non-overlapping (adjacent channel with no guard band), partial overlapping and full overlapping RF spectrum. To measure the interaction...
The DVB-T2 standard is a very flexible system with a wide range of adjustable parameters. Moreover, within its main profile, another specification is defined, marked as DVB-T2-Lite. It is based on the same digital TV (DTV) system as the DVB-T2, but is more oriented on the mobile and portable TV scenarios. This paper deals with exploration of the DVB-T2-Lite profile using spatial diversity technique...
The number of wirelessly connected multimedia devices and different communication standards, supported by these devices, is rapidly increasing. However, the appropriate frequency bands (licensed and unlicensed) for data transmission by these standards are very limited. The rising density of wireless networks and their coexistence in the same or adjacent radio frequency (RF) spectrum can significantly...
Nowadays, the demand for high-quality multimedia services (video, audio, image, and data) is rapidly increasing. The Digital Video Broadcasting - terrestrial (DVB-T) standard, its second-generation version (DVB-T2), and the Long-Term Evolution (LTE) standard are the most promising systems to fulfill the demand for advanced multimedia services (e.g., high-definition image and video quality), especially...
The development and effective use of wireless communication systems to provide mobile services is rapidly increasing. Nowadays, the world's most perspective standards to provide wireless multimedia services in high quality are LTE (Long-Term Evolution) and DVB-T2 Lite (DVB-2nd Generation Terrestrial). On the other hand, these wireless multimedia systems can many times operate in a neighboring frequency...
Quality of Experience (QoE) in 3DTV may be influenced by many factors, such as the viewing conditions, the characteristics of the panel of viewers, etc. In this study, the impact of two factors, namely the test environment and the display technology are analyzed. Particularly, two paired comparison experiments have been carried out to assess the overall preference of experience (PoE) for a set of...
This contribution introduces a new system for foot arch 3D scanning. The aim of this scanning is mainly automatic arch deformity detection and treatment efficiency evaluation in comparison among alternative therapeutic methods. Common arch deformities, which should be scaled and measured by the proposed method, are well known pes planus and pes cavus. Contemporary methods of their detection and description...
The rising density of wireless networks and the related rising number of user equipment increase the vulnerability of interference generation. These interfering signals could be generated as the result of the co-existence of wireless standards like DVB-T, LTE, WCDMA, WiMAX, GSM, Wi-Fi and other services transmitted in adjacent bands of the radio spectrum. The received signals are mixed with the higher...
In this paper the influence of mobile network interfering products on DTV (Digital Television) services is explored and evaluated. More precisely, the overall aim of this paper is to measure and show the interactions between the mobile (GSM) and digital terrestrial television (DVB-T/H) broadcasting networks and services. In the DVB-T/H system configuration, the TPS (Transmission Parameter Signaling)...
This paper briefly summaries relation of camera configuration and extended stereo baseline to distortions that can be caused by camera shooting. The reasons, why to use these are also mentioned in the paper. Influence of nontraditional configuration of the cameras on the depth map generation of the 3D video content has been practically described and measured. Depth map dynamic range compression and...
This article deals with possibilities of using profilometry as a macroscopic depth scanning system for 3D real time video shooting. It consists of short theoretical part about classical depth map estimation from images of stereo pair and basic profilometry. Then there are discussed three types of profilometry algorithms, which were tested on real scenes and related problems, caused by profilometry...
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