Satellite Television Research Articles

CSLT: Contourlet-Based Siamese Learning Tracker for Dim and Small Targets in Satellite Videos

CSLT: Contourlet-Based Siamese Learning Tracker for Dim and Small Targets in Satellite Videos

Multi-Object Tracking by Detecting Small Objects in Satellite Video

Multi-Object Tracking by Detecting Small Objects in Satellite Video

Multiple Source Domain Adaptation for Multiple Object Tracking in Satellite Video

Multiple Source Domain Adaptation for Multiple Object Tracking in Satellite Video

A Feasibility Study on Opportunistic Rainfall Measurement From Satellite TV Broadcasts

Rainfall precipitation maps are usually derived based on the measurements collected by classical weather devices, such as rain gauges and weather stations. This article aims to show the benefits obtained by opportunistic rainfall measurements based on signal strength measurements provided by commercial-grade satellite terminals (e.g., used in TV broadcasting). To assess not only the feasibility of this approach, with significant advantages in terms of capital and operational expenditure, but also improvements in terms of accuracy, we focus on a case study for agricultural applications using a Gaussian-modeled synthetic rain over a specific, real-world test area.

Modeling of a DVB-S2 Transmission Chain with Optimization of Adjustment Parameters for a Good Quality of the Reception Signal

Digital television is part of our daily lives. We took an interest in the DVB-S2 standard in particular, because it is the one that governs the transmission by satellite of multimedia content from television programs. With ever-changing user needs, there are new challenges that the DVB-S2 standard is no longer able to meet due to errors caused by weather and hardware limitations. The main purpose of a satellite TV transmission is to obtain a video signal in reception of the best possible quality and at a high bit rate. It is therefore important to determine all the factors which could intervene in the process of transmission and which have a negative impact on the yield at the reception of the signal. We therefore designed and simulated the DVB-S and DVB-S2 transmission chains with QPSK modulation (and an FEC coding rate of 1/2), on MATLAB software (Simulink), and with an AWGN channel for the sake of comparison performance between these two chains. Then we carried out the design of the DVB-S2 transmission chain with an RF (Radio Frequency) satellite channel, by materializing all the elements which intervene in the downlink to evaluate the performance of this chain according to the factors which influence and/or degrade the signal quality between transmission and reception at the receiving earth station. The main results obtained relate to the DVB-S2 transmission chain and were interpreted using the visualization of the error rate blocks: With an AWGN channel, increasing the signal-to-noise ratio decreases the rate of erroneous packets and therefore improves the quality of the received signal. With an RF satellite channel on the downlink: increasing the transmit power improves the receive performance, this is useful for correcting most RF imperfections; having larger parabolic antennas is an advantage because they have greater gains; this makes it possible to minimize the rate of erroneous packets. These simulations allowed us to determine the precise and numerical impact of RF degradations on the performance of the downlink DVB-S2 transmission chain.

A Study on the Innovative Transformation Path of Local TV Stations in the New Media Era—A Case Study of Henan Satellite TV’s Out-of-Circle Cultural Programs

A Study on the Innovative Transformation Path of Local TV Stations in the New Media Era—A Case Study of Henan Satellite TV’s Out-of-Circle Cultural Programs

Analysis of Different Types of Antenna for Television Network and Extracting C Band Channels

Television network is a system of transmitting and receiving television signals over a large area. Antenna is a device that converts electromagnetic waves into electric currents or vice versa. Antenna plays a crucial role in the performance and quality of television network. In this paper, we will analyze different types of antenna for television network, such as dipole antenna, yagi antenna, parabolic antenna and fractal antenna. We will compare their advantages and disadvantages, and suggest some criteria for choosing the best antenna for different scenarios. Dipole antenna is the simplest and most common type of antenna for television network. It consists of two metal rods or wires of equal length that are connected to a transmitter or receiver. Dipole antenna can receive signals from any direction in a horizontal plane, but has a low gain and a narrow bandwidth. Dipole antenna is suitable for local television stations or indoor applications. Yagi antenna is a directional antenna that consists of a dipole antenna and several parasitic elements, such as reflectors and directors. Yagi antenna can focus the signals in one direction and reject the signals from other directions, thus increasing the gain and reducing the interference. Yagi antenna has a moderate bandwidth and can be easily adjusted to different frequencies. Yagi antenna is suitable for long-distance television network or outdoor applications. Parabolic antenna is another directional antenna that consists of a parabolic reflector and a feed horn. Parabolic antenna can concentrate the signals into a narrow beam and achieve a high gain and a wide bandwidth. Parabolic antenna can also receive signals from satellites or other high-altitude sources. Parabolic antenna is suitable for satellite television network or high-definition television network. Fractal antenna is a novel type of antenna that uses fractal geometry to design its shape and structure. Fractal antenna can have multiple resonant frequencies and a large effective area, thus increasing the bandwidth and the efficiency. Fractal antenna can also have self-similarity and scalability, which means it can be miniaturized or enlarged without affecting its performance. Fractal antenna is suitable for digital television network or wireless communication network. In conclusion, different types of antenna have different characteristics and applications for television network. Depending on the factors such as distance, frequency, direction, interference, quality and cost, one can choose the best antenna for their specific needs

تأثير وسائل الإعلام في السياسات الدولية بالمنطقة العربية

The study aims to study the influence of the media on international politics, and to support the axes of the thesis with case studies from various platforms and media outlets that lived through the phases of the democratic Arab Spring series in all the Arab countries that the thesis will address to talk about. The studies included in the content of the thesis reveal the available conceptual and theoretical links. Between the information and communication revolution on the one hand, and the democratic transition on the other. From these basic concepts and relationships, there are many objectives that are based on the influence exerted by the most prominent manifestations of the communications and information revolution, such as satellite television channels and the Internet, in their relationship to the process of forming public opinion, institutions, bodies and parties in the Arab region. The study also aims to democratize and build systems and institutions in the region. Al-Arabiya operates according to a forward-looking vision for political and social relations.

“Measurement of Effectiveness of Marketing Strategies of Satellite Television Channels in Bangladesh”

In today’s modern world television is not only a medium of entertainment, it has become edutainment. Satellite channels have enabled people to get knowledge and entertainment together. Realizing the need of people for edutainment different organizations have come forward and tried to meet the unsatisfied need. It has brought the world to our palms. In this paper, the author has tried to analyze the current situation of this industry and the marketing strategies undertaken by selected satellite channels in Bangladesh which include Channel I, RTV, NTV, and Bangla Vision. The channels are selected on the basis of the convenience of the researchers. The Personal interview method is used to collect data regarding the marketing activities of the mentioned channels. The main focus of this paper is to measure and evaluate the effectiveness of those marketing activities and to find out the shortcomings of the usage of marketing tools by these channels.

Recent Advances in Intelligent Processing of Satellite Video: Challenges, Methods, and Applications

Recent Advances in Intelligent Processing of Satellite Video: Challenges, Methods, and Applications

DFAT: Dynamic Feature-Adaptive Tracking

During target tracking process, the state of the target is usually unpredictable. In theory, it is often beneficial to automatically assign suitable features to describe the specific target in each frame. Inspired by this, in this paper, we propose a novel dynamic feature-adaptive tracking framework (DFAT) which automatically assigns appropriate features to the consecutive frames during tracking process to boost the tracking performance. To implement DFAT, a large pool consisting of trackers/experts based on correlation filtering (CF) is constructed which is called candidate pool (CandPool). The diversity of the experts lies in their feature configurations and we call them candidate experts (CandExp). In this way, different features can be assigned for continuously changed scenarios and the target. Then to assign suitable experts, for each frame, we design the dynamic tracking process as the following three steps: (1) Several experts which are called executive experts (ExeExp) are selected from the CandPool according to CandExps’ past performance. (2) The ExeExps generate the tracking results and the performance of them are evaluated via a novel evaluation mechanism. (3) The selection rate of each CandExp in the CandPool is updated according to the performance evaluation and the final tracking result is selected. To better evaluate the CandExp, we propose two novel criteria: (1) content similarity weighted intra-evaluation, and (2) response confidence based self-evaluation. Compared with traditional post-event ensemble trackers that use fixed experts, the proposed method learns to dynamically assign appropriate ExeExps selected from a large CandPool which leads to adaption to different cases. Moreover, overfitting caused by fixed experts can also be mitigated via dynamic tracking. Experiments on both public available general and satellite videos based data sets demonstrate the superiority of the proposed method.

Aircraft Tracking Based on an Antidrift Multifilter Tracker in Satellite Video Data

Aircraft Tracking Based on an Antidrift Multifilter Tracker in Satellite Video Data

Low-Frequency Attitude Error Compensation for the Jilin-1 Satellite Based on Star Observation

Owing to changes in the space thermal environment, the optical axis angle between the camera and star tracker (Cam-ST) changes as well, resulting in regular low-frequency attitude errors and a decline in the geometric positioning accuracy of the images. In this study, a star-observation-based low-frequency attitude error correction method is proposed. First, the star was used as the control point to be observed by satellite from different latitudes in an orbit. The star information is extracted using a priori attitude to obtain the camera pointing in inertial coordinates. Second, combined with the optical axis pointing value of the star tracker, the angle change between the camera and two star trackers (Cam-2STs) was calculated. A polynomial model was used to fit the angle change, and the fitting model and camera optical axis pointing compensation algorithm were used to compensate for the camera optical axis. Third, the regular low-frequency attitude error of the camera was realized. The experiment used 20 groups of star observation data from two missions of the Jilin-1 07 video satellite. After compensation, the camera pointing maximum root mean square error was reduced from 30.08" to 7.70", the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">X</i> -axis attitude error was reduced from 13.26" to 7.09", and the <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Y</i> -axis from 29.48" to 7.36". The geometric positioning accuracy of Jilin-1 ground images was 25.63 m after correction. The experimental results showed that the proposed method effectively improved the attitude measurement accuracy. This method can thus effectively improve the direct geometric positioning accuracy of a single image.

Modern approaches of high-voltage transmission lines monitoring

Transmission lines require timely inspection and monitoring to prevent emergency situations during operation. System emergency situations as blackout are very undesirable, so they need their previous detection and prevention. Accordingly, this can be avoided by detailed monitoring the functioning of all elements of the power system. The directions of remote control for researching the operational state of electric power facilities through the use of special equipment, in particular aerial vehicles, have gained sufficient development. Possibilities of practical means of remote monitoring of power transmission lines are also considered. Due to their relatively inexpensive use and ease of operation, distant controlled aerial vehicles are an effective approach for surveying high-voltage power lines. A number of advantages of using distant controlled aerial vehicles are the extended functionality of monitoring quality provided by modern equipment. Functional analysis of modern on-board equipment indicates the possibility of detecting research objects on a real-time scale, due to the use of telemetry, satellite and combined television and thermal imaging systems, with the possibility of detailed observe. The most perspective is the use of combined heat-television systems, which allow improving the technical characteristics of the surveillance system significantly. This method provides monitoring of heat losses, detection of overheated elements of transmission lines and assessment of the performance of elements. Such technology ensures more safer and timely detection of malfunctions, threats to operation and carrying out work on their elimination. In addition, the fields of application of distant controlled aerial vehicles as surveys for the design of energy systems are increasing.

Impact of Social Media Selected TV Programmes on Current Social Issues and Factors Affected the Categories of Viewers

Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location. The signals are received via an outdoor parabolic antenna commonly referred to as a satellite dish and a low-noise block down converter. A satellite receiver then decodes the desired television programme for viewing on a television set. Receivers can be external set-top boxes, or a built-in television tuner. Satellite television provides a wide range of channels and services. It is usually the only television available in many remote geographic areas without terrestrial television or cable television service. Early systems used analog signals, but modern ones use digital signals which allow transmission of the modern television standard high-definition television, due to the significantly improved spectral efficiency of digital broadcasting.

RESEARCH ON EMERGENCY RESPONSE SYSTEM OF DANGEROUS GOODS TRANSPORTATION VEHICLES

Abstract. Due to the flammable, explosive, corrosive, radioactive and other characteristics of dangerous goods, if a traffic accident or leakage accident occurs during transportation, it will seriously endanger public safety and the safety of people's lives and property. It is of great significance for urban safety and stability to establish a risk early warning mechanism, ensure the safe transportation of dangerous goods, and formulate emergency rescue measures. In view of the problems that may occur during the transportation of dangerous goods, such as weak supervision, low efficiency in obtaining accident information, and difficulty in emergency treatment, this paper constructed a comprehensive perception and collaborative integration of urban emergency response system by integrating vehicle target intelligent monitoring platform and decision support platform. Under the support of target detection and tracking technology, PyQt5 is used to build an intelligent vehicle target monitoring platform based on satellite video data, which realizes the real-time tracking, monitoring and early warning functions for dangerous goods transport vehicles, and can quickly complete the location of emergencies and the statistics of environmental road information after an accident. With the support of database technology and ArcGIS Engine embedded component library, a decision support platform integrating statistics and spatial analysis is constructed. GIS technology is used to realize the spatial analysis of emergency points and basic information management functions. At the same time, the platform is based on the two basic starting points of fast response to emergency events and high scheduling efficiency, which realizes the rapid determination of the accident impact area and the planning of emergency rescue routes. Taking Chengdu as an example, the emergency response system constructed in this paper can monitor dangerous goods transport vehicles in the urban area in real time, and formulate emergency response measures in seconds. The system is conducive to reducing the damage and loss caused by emergencies and improving the informatization level of emergency related departments.

Prehistoria nowych mediów w wersji krajowej (uwagi na marginesie lektury monografii Piotra Sitarskiego, Marii B. Gardy i Krzysztofa Jajki „Nowe media” w PRL)

The article presents the monograph by Piotr Sitarski, Maria B. Garda, and Krzysztof Jajko Nowe media w PRL [New Media in the Polish People’s Republic]. The authors of the book presented how technological development was assimilated by society in the final stage of the existence of the Polish People’s Republic. Individual chapters describe the process of social assimilation of video, microcomputers, and satellite television in Poland. Referring to social history, the authors show the beginnings of the Polish digital society in the 1980s. They do this using modern methodologies from history of technology, social history, and oral history. The aim of the article is to show the processes discussed in the book against the background of social and political changes of the epoch. The documents cited (Uchwała generalna VI Kongresu Techników Polskich [Resolution of the VI Congress of Polish Technicians]) and events (Rok Nauki Polskiej [Year of Polish Science], II Kongres Nauki [II Congress of Science]) allow us to see the links between the modernization of the Polish and communist propaganda. The technology was aimed to certify the strength of the socialist system.

Becoming a Good Chinese Father – Reality TV in China and its Reception

In 2013, Hunan Television, one of China’s most successful provincial satellite television stations, debuted a reality TV series featuring celebrity fathers and their children. A localized version of a Korean-developed format, Where Are We Going, Dad ( baba quna’er) brought dads and kids together to different locations in the countryside, usually very remote and exotic, to complete certain assignments. This inquiry takes Where Are We Going, Dad as its focus; it seeks to understand how and how far notions of fatherhood are being constructed and circulated in contemporary China. It does so by way of audiences. While the show was evidently configuring and promoting their versions of fatherhood, we wanted to find out what viewers thought of the show, and of fatherhood. Located in the juncture of fatherhood and reality show studies, this exploratory inquiry identifies three themes from the conversations of four families in urban China. First, they articulate the difficulty of being a good father in a rapidly changing China and the concomitant longing to a return of traditional Chinese fatherhood. A second recurring theme concerns the ways in which they accept this tension between tradition and modernity. Finally, they demonstrate savviness in their viewing of the show. We build on the three themes to argue that such reality shows do impact on Chinese families’ understanding of fatherhood, but their savvy viewership points to the limit of such media impact.

Deep locally linear embedding network

Recent years have seen great progress in many deep learning-based super-resolution methods that learn global responses through the non-local strategy. However, improper linear fitting tends to produce unsatisfactory results with notable artifacts. To relieve the improper linear fitting and reuse the hierarchical features, we propose an end-to-end locally linear embedding super-resolution network, termed as LLE-Net, based on the assumption that the local geometric relationship in the low-resolution manifold space also exists in high-level feature manifold space. The proposed LLE-Net includes two major components: 1) the local linear embedding block (LLEB) and 2) the hierarchical non-local block (HNB). In particular, LLEB searches sparse and similar feature maps and embeds the geometric relationship into the high-level feature space, allowing more attention to be paid to objects’ textural details. To promote the representation ability, the proposed HNB is able to explore layer- and pixel-level interdependencies. We conduct extensive experiments to evaluate the superiority of LLE-Net via two groups of experiments: (1) super-resolution tasks on two satellite image datasets and a satellite video image dataset, and (2) the subsequent high-level image processing tasks (i.e., satellite semantic segmentation). The proposed method achieves an 0.7 dB improvement in PSNR value on the Draper dataset and 0.07% segmentation accuracy improvement. The source code of the proposed LLE-Net is publicly available.

Role of Media for Promotion of Sports in Pakistan

Purpose of this article study, media influence on promoting sports’ that the media is tool which used for the promoting of sports the study about media and sports had been a popular topic for many years. Study on media and its influence many authors have point out the reality of a close link between sports and the Electronic, social media in the world. The media it consists of any form is taking part in promotion of sports, such as Television’s or Radio-show, (or commentator) on competitions or races. There is also best part; lives and contest shows about sports, on LED and Satellite Television’s. These events/ show, matches information and guides about events in the world about game. All players and sports hero or wining players have their own websites where anyone can get all kinds of information about the different games/ matches. Print media and magazines, as well as articles about athletes and clubs. The main objectives of this research are to show the influence of media on sports. This study was consisted of 2500 participants comparing both ganders (males and females). This research is qualitative in nature and design. In this research, researcher used questionnaires relevant to T.V, internet, electronic media as data collection tool. The data was analyzed through descriptive statistics A findings showed that both males and females participants were in favor of electronic media has a great influence on promoting the sports.