scispace - formally typeset
Search or ask a question

Answers from top 9 papers

More filters
Papers (9)Insight
Expansion in 3G cellular coverage and the emergence of more powerful mobile devices has increased demand for massively scalable mobile video delivery.
Proceedings ArticleDOI
J. Vass, S. Zhuang, Jia Yao, Xinhua Zhuang 
01 Jan 1999
16 Citations
As a result, no additional requirements are imposed on the mobile client and video server, so that mobile users interact with the server in exactly the same way as stationary users, and all they experience are better picture quality, less jerky video and shorter delays.
Video coding with this method is inherently scalable, and has applications in mobile broadcast.
Experimental results show that the proposed method enables the H.264/AVC coder to be effectively adopted for mobile video communications.
For real-time video broadcast where multiple users are interested in the same content, mobile-to-mobile cooperation can be utilized to improve delivery efficiency and reduce network utilization.
Open accessJournal ArticleDOI
Wei Song, Dian Tjondronegoro 
66 Citations
Future user-centred mobile video delivery systems can benefit from applying the proposed QoE-based management to optimize video coding and quality delivery strategies.
In return, the user perception of the mobile video quality can be substantially improved.
Journal ArticleDOI
Yanwei Liu, Song Ci, Hui Tang, Yun Ye, Jinxia Liu 
16 Oct 2012
25 Citations
In this article, we propose a QoE-oriented transcoding approach to enhance the quality of mobile 3D video service.
Therefore, the proposed algorithm is suitable for mobile video broadcasting applications.

See what other people are reading

Customer experience on 5G network services?
5 answers
Customer experience on 5G network services is a critical aspect influenced by various factors. The evolution to 5G networks brings forth challenges and opportunities for enhancing Quality of Experience (QoE). The coevolution of 5G technology and market demands reveals patterns in user expectations and infrastructure needs. In the context of User Equipment camping on both 4G and 5G networks, optimizing parameters for EUTRAN New-Radio Dual-Connectivity (EN-DC) is crucial to avoid compromising QoE due to radio-link failures or voice muting. By leveraging machine learning models and optimization techniques, operators can maximize EN-DC activation while minimizing risks to QoE, ensuring a seamless and satisfactory customer experience on 5G services.
What are the key factors that influence the subjective assessment of television picture quality?
5 answers
Subjective assessment of television picture quality is influenced by various factors. These include the importance of human vision in evaluating image quality, the role of memory in quality assessment, the impact of image content versus structural distortions, the effects of packet loss, bit rate, frame rate, and codec on video quality, and the limitations of Mean Opinion Score (MOS) assessments in capturing user experience accurately. Factors such as viewing conditions, observers, test preparation, test methods, and result analysis are crucial in subjective evaluation methods for high-quality display devices. Additionally, the frequency of watching online video content and user delight with the content significantly influence user feedback, emphasizing the need for additional metrics alongside MOS for more precise content ratings.
How does the allocation of frame rates affect the overall gaming experience in cloud-based platforms?
5 answers
The allocation of frame rates significantly impacts the gaming experience in cloud-based platforms. Cloud gaming providers face challenges in meeting the demands of users with varying hardware limitations. Strategies like predictive frame transmission aim to reduce frame loss rates and enhance user experience by pre-transmitting game frames based on network conditions. Research indicates a trade-off between frame rate and bit rate, where lower bit rates may improve video quality initially, but excessively low frame rates can lead to negative impacts on video quality and gameplay control. Optimizing frame rate allocation not only influences the Quality of Experience (QoE) for users but also plays a crucial role in maximizing profitability for cloud service providers.
What is the main technology underlying Uber's mobile app ?
5 answers
Uber's mobile app relies on a sophisticated real-time data infrastructurethat processes petabytes of data collected from various users daily, including drivers, riders, restaurants, and more. This infrastructure heavily leverages open-source technologies customized to meet Uber's unique scale and requirements. Additionally, Uber has implemented a smart reply system called one-click-chat (OCC), which enables driver-partners to quickly respond to rider messages using machine learning algorithms for intent detection and reply retrieval. The app's functionality is further enhanced by mobile computing and peer-to-peer technology, facilitating the peer-to-peer provision of services without owning any physical assets like cars or tutors. Overall, Uber's mobile app is underpinned by a blend of real-time data processing, machine learning, and peer-to-peer technology to deliver efficient and seamless services to its users.
What are three software types?
5 answers
Three types of software systems can be identified based on their specifications and behavioral patterns. These types include software for mobile computing devices that utilize a runtime library with three key components: raw binary data transmission, ordered name/value pairs, and an abstract API definition. Additionally, in the realm of software development and maintenance, managing system complexity is crucial, leading to the growth of programming methodologies and languages that focus on abstractions. These abstractions simplify system descriptions by emphasizing significant information while suppressing irrelevant details, aiding in coping with system complexity and facilitating software development and maintenance processes.
How to hack cell device with out having acces to mobile?
5 answers
To hack a cell device without physical access, attackers can exploit vulnerabilities in mobile communication protocols and services. Techniques include de-authentication attacks using the ESP8266 microchip, draining battery power through insecure cellular services like MMS and PDP context retention, utilizing voice commands for unnoticed security breaches, initiating attacks like data quota drain and battery drain on devices with public IP addresses, and using sound-based covert channels like ultrasonic and isolated sound to bypass information flow control systems. By leveraging these weaknesses, hackers can remotely compromise mobile devices, drain their resources, and potentially gain unauthorized access without physical contact.
What are the current trends and projections for the growth of the global mobile phone market?
5 answers
The global mobile phone market is experiencing exponential growth with projections indicating a significant increase in mobile data traffic. By 2020, mobile networks are expected to handle 127 exabytes of data annually, marking a 30-fold increase from previous levels. The emergence of 5G technology is set to offer peak data rates of up to 20 Gbps by 2020, catering to the rising demand for high-quality services like ultra-high-definition video and mobile cloud computing. Additionally, forecasts suggest a shift towards mobile devices substituting desktops in the near future, highlighting the increasing importance of mobile gadgets in the industry. These trends underscore the indispensable role of mobile phones in modern life, with continuous advancements and innovations shaping the competitive landscape of the market.
What is an identification system?
5 answers
An identification system is a mechanism designed to uniquely identify users or items based on specific data sets or patterns. Various approaches exist, such as utilizing accumulated data on mobile devices, algorithmic problems related to computing isomorphisms in algebras, optical systems for specimen identification, and labels with data representations on products. Additionally, personal identification systems can involve color pattern generation, eye imaging, and pattern estimation for identity verification. These systems employ different technologies and methods, ranging from mobile data collection to optical spectroscopy and color pattern recognition, to ensure accurate and secure identification processes for users or products.
Whatsapp group chat definition
5 answers
A WhatsApp group chat refers to a communication setting within the WhatsApp messaging application where multiple participants can exchange various types of messages like text, voice, images, and videos. These group chats are instrumental in facilitating information sharing among a large number of users, impacting mobile network traffic due to the transmission of messages to all group members. Research highlights the significance of WhatsApp group chats in fulfilling information needs, such as career opportunities for university students, showcasing how these chats enable job search, information sharing, and career preparation. Detailed analyses of WhatsApp group messages involve identifying active participants, preferred message types, peak activity days, and the age groups most engaged, often utilizing machine learning algorithms for data interpretation.
How math solving app affect academic performance of the senior high school students?
5 answers
Math solving apps have shown varying effects on the academic performance of senior high school students. Studies have indicated that the use of electronic applications like Mathspace can lead to improvements in solving algebra problems involving exponents, although performance levels may decrease once app usage ceases. Additionally, the perceived effects of app utilization on study habits and academic performance have been explored, with findings suggesting that math apps can aid in problem-solving, learning specific lessons, and improving academic performance, but may also lead to dependency, laziness, and tiredness among students. Moreover, the use of offline mobile game applications has been found to increase numeracy skills, positively impacting academic performance in mathematics among Grade 11 students. However, a study on traditional classroom teaching augmented by mobile learning revealed that while both teaching methods yielded similar post-test results, interesting relationships between student performance and app usage were uncovered.
What are the struggles in having no resources for research experiment?
5 answers
Having limited resources for research experiments poses significant challenges, including inadequate infrastructure, lack of educational resources, and limited support from supervisors. In resource-limited settings, conducting clinical trials faces obstacles such as poor record-keeping, budgetary constraints, and communication challenges. Furthermore, in low-resource environments, frontline research staff encounter risks like job insecurity, moral distress, and physical harm, especially during public health crises, emphasizing the need for additional risk assessment and support mechanisms. Additionally, poor ICT infrastructure in remote regions hinders participation in international research projects, particularly those relying on electronic data capture and internet technologies. These struggles highlight the importance of addressing resource limitations to ensure the successful and ethical conduct of research experiments.