Multimedia Communications Research Papers - Academia.edu (original) (raw)

2025

The stringent requirements of wireless multimediatransmission lead to very high radio spectrum solicitation. Although the radio spectrum is considered as a scarce resource, theissue with spectrum availability is not scarcity, but the inefficientutilization. Unique characteristics of cognitive radio (CR) suchas flexibility, adaptability, and interoperability, particularly havecontributed to it being the optimum technological candidate toalleviate the issue of spectrum scarcity for multimedia communications. However, multimedia communications over CRnetworks (MCRNs) as a bandwidth-hungry, delay-sensitive, andloss-tolerant service, exposes several severe challenges speciallyto guarantee quality of service (QoS) and quality of experience(QoE). As a result, to date, different schemes based on source andchannel coding, multicast, and distributed streaming, have beenexamined to improve the QoS/QoE in MCRNs. In this paper,we survey QoS/QoE provisioning schemes in MCRNs. We firstdiscuss the ...

2025, Quórum Académico

El trabajo que se presenta a continuación se deriva de una propuesta para estandarizar nuevas formas de escritura en los cibermedios a partir de los postulados de Nielsen (1997), Pérez y Perea (1998), Salaverría (1999) y Díaz Noci (2002). La propuesta establece diferencias y tendencias evolutivas a la luz de los recursos que aporta la virtualidad, interactividad e hipermedia a las posibilidades narrativas del texto periodístico. Luego del análisis se concluye que fusionar la estructura informativa de la pirámide invertida con el hipertexto, aparece como la vía más idónea para construir la estructura de una noticia en formato Web.

2025, Advanced Computational Intelligence: An International Journal (ACII)

2025

Ce document est une simulation de projet élaborée dans le cadre d'un Executive Master of Business Administration (EMBA) à l'IPES Business School, axée sur la cacaoculture à Aquin, Haïti. Il identifie un problème récurrent de gaspillage du cacao durant la période de récolte dû à une insuffisance de compétences et un désintérêt de la communauté. Le projet vise à résoudre cette situation inacceptable en renforçant les capacités techniques des agriculteurs et en améliorant l'exploitation commerciale du cacao pour optimiser la cacaoculture à Aquin.

2025, Nanotechnology Perceptions

design model via a transformation. A solution design model provides sufficient and complete information to provision the requested service. A high-level solution design model is then refined into a set of provisioning parameters that can... more

2025, Kurdish Studies

Zero-touch networks and services design and management have been studied both in academia and industry. This text focuses on the overall operation of the telecom field, especially on operations support systems and business support systems. The traditional telecom OSS/BSS ecosystem has been observed as being too complex and evolving slowly. This has impacted service providers in a variety of business and technological aspects. This text explains the new OSS/BSS ecosystem, its fundamental components, AI's critical role, the need for a new AI paradigm, and its advanced implementation during a service provider's zero-touch OSS/BSS transformation journey. The future of a zero-touch telecom OSS/BSS ecosystem is analyzed. The telecom industry is transitioning to zero-touch network and services across the whole telecom ecosystem including the network operating environment (network operation, deployment, and maintenance);services;business. This text focuses on the first one: zero-touch OSS/BSS, the evolution of the telecom OSS/BSS ecosystem, and the convergence of advanced DevOps and agentic AI. Zero-touch OSS/BSS can automate and orchestrate complex engineering tasks without human intervention. This allows a multitude of technologies and subsystems in the OSS/BSS ecosystem to collaborate in a multi-domain way. This allows for the entire OSS/BSS ecosystem to deliver fully autonomous, intelligent, and high-velocity operation capabilities. Exponential growth of complexity in service providers' OSS/BSS ecosystems (demand for complex and sophisticated capabilities, emergent requirements from multi-partner collaboration, diversifying applications of emerging technologies). Underlying reasons include: Slow evolution leading to technology and system siloed issues; Tendencies of building orchestration-centric OSS/BSS systems. The need for a new OSS/BSS ecosystem (digital transformation requires a paradigm shift). The only viable option is to completely overhaul the OSS/BSS ecosystem: Construction principles (augmented intelligence, DAO, service-centric), and Technical framework (OSS/BSS architecture stack).

2025

In this paper, we introduce a joint flow control and scheduling algorithm for multi-hop cognitive radio networks with spectrum underlay. Our proposed algorithm maximizes the total utility of secondary users while stabilizing the cognitive radio network and still satisfies the total interference from secondary users to primary network is less than an accepted level. Based on Lyapunov optimization technique, we show that our scheme is arbitrarily close to the optimal.

2025, DEFENSIVE ARCHITECTURE OF THE MEDITERRANEAN

The transition of the Kingdom of Sardinia to the House of Savoy in 1720 initiated series of comprehensive restoration and modernization campaigns aimed at the region's defensive architecture. The Savoy administration recognized the urgent need to strengthen military fortifications in response to evolving warfare demands, particularly along the coastlines. This led to the construction of advanced coastal defenses, replacing the simpler watchtowers of previous centuries with more complex and strategic fortifications, including anti-landing structures that integrated the latest military theories.
A pivotal figure in this ambitious architectural campaign was Saverio Belgrano, a military engineer active in Sardinia from 1761 to 1769. Graduated at the Military Academy of Turin, Belgrano expertly applied contemporary military knowledge, paying close attention to the strategic and topographical requirements of each site. His notable projects included the Fortezza Vecchia in Villasimius, the fort of San Vittorio in Carloforte, and the tower-fort on the island of Santo Stefano, all strategically located along key maritime routes.
Belgrano's designs were informed by both Vauban’s fortification principles and the Montalembert school, reflecting his ability to synthesize these influences and innovate based on Sardinia’s unique defense needs. Despite the constraints of his official responsibilities, Belgrano produced a diverse array of innovative architectural projects throughout the region, effectively addressing both public and private commissioning needs.

2025, Defense Architecture of the Medieterranean, vol. XIX, a cura dim Ornella Zerlenga, Vincenzo Cirillo, pp. 539-546.

The contribution offered focuses on a topic that has so far been little systematically investigated by historiography, but is equally stimulating for the complexity of the theme and the wealth of evidence that characterizes it: tower houses.
It is a passive defense system conceived by feudal lords to defend their possessions, both from attacks coming from the sea and from internal ones. The construction of these factories, begun in the second half of the 16th century, integrated that of the coastal towers built from the 1630s onwards at the behest of the vice-kings of Naples (affecting the entire territory of the Kingdom, from the Tyrrhenian coast to the Adriatic coast). Much of the northern territory of the Kingdom of Naples was affected - the area investigated in this contribution - of which there are testimonies in the current province of Caserta: in the Garigliano Valley and in that of the Volturno, in the territories of Sessa Aurunca, Cellole, Mondragone, to push into the Aversa countryside up to Naples and even beyond, in Cilento.
The typological and constructive aspects of these buildings are interesting, and closely recall the contemporary factories of the Papal State.
Currently, many of them are privately owned and have lost the identifying features that characterized them, with the risk that important testimonies of a constructive practice that was in continuity with the central power may be lost.
The research, investigating these architectures, aims to bring out the methodological process that favored their construction, the constructive and typological features that characterize them, to reach the conservation problems and advance proposals for the protection and enhancement of the cultural landscape that these determine.

2025

Network Function Virtualization (NFV) has emerged as a transformative paradigm in the field of telecommunications and networking. It introduces a revolutionary approach by decoupling network functions from dedicated hardware appliances and instead, vitalizing them to run on general-purpose servers. This shift from traditional, hardware-centric infrastructure to a more flexible and scalable virtualized environment offers numerous advantages, including improved resource utilization, reduced operational costs, and enhanced agility in deploying and managing network services. As the telecommunications industry continues to evolve towards a more software-centric model, NFV stands out as a pivotal enabler for achieving flexibility, scalability, and efficiency in the delivery of next-generation network services. The ongoing evolution of NFV technologies, coupled with collaborative industry efforts, holds the promise of unlocking new possibilities and driving innovation in the dynamic world of telecommunications. NFV allows for the virtualization of network functions, enabling them to run on commodity hardware. This leads to better resource utilization and reduced dependency on specialized hardware appliances, translating to cost savings for service providers. Research in NFV provides valuable insights into real-world applications and case studies, demonstrating how organizations can leverage NFV to solve specific challenges, improve efficiency, and deliver innovative network services. Method: TOPSIS, Using the positive ideal solution and the negative ideal solution as reference solutions, this method calculates the geometric distance between each alternative solution. The fundamental tenet of TOPSIS is that the performance criteria are assumed to be ascending, with higher numbers denoting superior performance. In order to accommodate different dimensions or scales between the criteria, the TOPSIS architecture frequently uses normalization. Result: From the result Isolation and security is got the first rank and Vendor lock in mitigation is having the lowest rank.

2025, Defensive Architecture of the Mediterranean / Vol. XIX / Zerlenga, Cirillo (Eds.)

The paper reports the results of an analysis on the ducal tower of Mondragone, in northern Campania. Attributable to building initiatives of the 16th century, the building is one of the most impressive turreted structures of the viceregal period.
It has a truncated pyramidal shoe base surmounted by a parallelepiped structure, in turn surmounted by battlements. Its height and form allude to medieval defensive structures, rather than to Renaissance military architecture, less vulnerable to artillery: the tower, although far from the sea, represented a significant protection and lookout position for the internal areas.
A further reason for inspiration from the constructions of the Middle Ages lies in the need of architects, in the peripheral territories of the Kingdom of Naples, to follow executive practices closer to their knowledge in the building field, the result of consolidated experiences.
The tower, subject to protection restrictions after the Second World War, has a quadrangular plan and masonry made with regular tuff ashlars and split limestone elements.
It is divided into three overlapping environments. The one on the first level allowed the storage of armaments, while the upper ones were intended for housing.
The aforementioned rooms have various vaults’ kinds: at the first there are order barrels, at the second sail, at the third pseudo-cross. The roof is flat.
In the thickness of the western wall runs a staircase that leads up to the battlements. Below, inside the wall, there is a tunnel that runs along its perimeter, in which slits open for defence and for spotting enemies.
The tower is privately owned: today the ground floor is used as a warehouse and the upper floors are used as a residence. The adjacent structure is also residential and has, on the second level, a loggia with three arches.

2025, Indonesian Journal of Computer Science

Efficient and reliable video communication is required to maintain highquality and uninterrupted streaming in order to minimize bandwidth usage and to tackle network variability. Scalable Video Coding (SVC) introduces efficiency for video communication by introducing a base layer and a set of enhancement layers, while Unequal Error Protection (UEP) can provide high protection to important layers while having low redundancy for less important layers/bits/frames. Moreover, scalable video transmission's efficiency can be further improved by multicasting a video to multiple recipients simultaneously over a network efficiently, where each user can adapt to network conditions. As existing surveys do not concentrate on discussing the improving efficiency and reliability of video communication by multicasting scalable video communication focusing on UEP, we review these factors individually and in combination. We first gathered 113 original research studies using qualification criteria searched using electronic libraries, leveraging an elaborative process. As per the review, video scalability has been achieved using temporal scalability, spatial scalability with spatial resolution, quality scalability using quantization steps, and slice grouping for region of interest scalability, while UEP is achieved using transceiver, packet level, bit level, and cross-layer methods. Moreover, simulcast, multiple access techniques, multi-resolution modulation, and antenna heterogeneity have shown to be the promising SVC multicasting techniques. Review analysis shows that from reviewed work, 10.3% provide H.265-based scalability, 19.2% use transceiver UEP, and 7.7% use simulcast. Finally, we conclude our review by discussing the advantages and challenges of the concept of SVC-UEP video communication and then presenting guidance to overcome them.

2025

A Quos aware model for streaming multiple heterogeneous multimedia services over ubiquitous networks is presented whose aim is to simultaneously support as many service streams as possible and to optimally guarantee all users' Quos within these environments. This paper proposes a novel admission control algorithm, in conjunction with a quality adaptation scheme, which is capable of effectively guaranteeing and improving the service quality. Upon examination of the simulation results, we conclude that the proposed model and schemes provide valuable guidelines for the planning of future ubiquitous networks and multimedia systems.

2025

2 Abstract: A Quos aware model for streaming multiple heterogeneous multimedia services over ubiquitous networks is presented whose aim is to simultaneously support as many service streams as possible and to optimally guarantee all users' Quos within these environments. This paper proposes a novel admission control algorithm, in conjunction with a quality adaptation scheme, which is capable of effectively guaranteeing and improving the service quality. Upon examination of the simulation results, we conclude that the proposed model and schemes provide valuable guidelines for the planning of future ubiquitous networks and multimedia systems.

2025

O presente estudo aborda questoes relacionadas a educacao e as tecnologias educacionais utilizadas nos processos de construcao de materiais didaticos direcionados para a educacao a distância, tendo como foco o trabalho da Equipe Multidisciplinar do NTE da UFSM. Busca-se refletir a respeito dos atores e processos envolvidos no desenvolvimento de materiais para a EaD, contemplando desde o apoio pedagogico, as revisoes linguisticas e tecnicas, as ilustracoes, as fotografias, a producao de audiovisuais, a diagramacao, ate a area de tecnologia da informacao. Este estudo baseou-se no aporte teorico-metodologico de autores como Freire (2002); Pulino Filho (2005); Mill, Oliveira e Ribeiro (2010); Tracy (1986); e Lidwell, Holden e Butler (2010). A Equipe Multidisciplinar do NTE configura-se como um elemento fundamental no processo de auxilio didatico, pedagogico e tecnico ao trabalho docente no âmbito da EaD. Nesse sentido, a figura do docente e suas diversas funcoes, assumidas no ensino a d...

2025

Ficha catalográfica elaborada por Alenir Goularte -CRB-10/990 Biblioteca Central da UFSM Educação ATENção: faz uma chamada ao leitor sobre um assunto, abordado no texto, que merece destaque pela relevância. iNTErATiviDADE: aponta recursos disponíveis na internet (sites, vídeos, jogos, artigos, objetos de aprendizagem) que auxiliam na compreensão do conteúdo da disciplina. SAiBA MAiS: traz sugestões de conhecimentos relacionados ao tema abordado, facilitando a aprendizagem do aluno. TErMo Do gloSSário: indica definição mais detalhada de um termo, palavra ou expressão utilizada no texto.

2025

Speech signal processing and voice identification is having its own significance in critical investigation process. Voice signal are non stationary. Wavelet transforms used for processing non stationary voice signals. Word dependent voice recognition system is proposed with the combination of Relative Spectral Algorithm (RASTA) for signal filtering and linear predictive coding (LPC) for detecting the voice signals. Wavelet coefficients are derived for statistical analysis. The proposed methodology comprises Voice registration process and Voice verification process. This process is simulated using MATLAB. The mean, standard deviation, variance, median statistical parameters are considered to verify the test voice signal with the registered voice signal. Index Terms — RASTA , LPC, Wavelets, mean, variance, standard deviation, median

2025, International journal of multimedia and its applications

High efficiency video coding (HEVC) is the newest video codec to increase significantly the coding efficiency of its ancestor H.264/Advance Video Coding. However, the HEVC delivers a highly increased computation complexity. In this paper, a coding unit partitioning pattern optimization method based on particle swarm optimization (PSO) is proposed to reduce the computational complexity of hierarchical quadtree-based coding unit partitioning. The required coding unit partitioning pattern for exhaustive partitioning and the rate distortion cost are efficiently considered as the chromosome and the fitness function of the PSO, respectively. To reduce the computational time, the cellular automata-based (CA) rule based time limit is used in order to find out the best possible modes of operation. Compared to the current state of the art algorithms, this scheme is computationally simple and achieves superior reconstructed video quality (12% increase in PSNR compared to existing methods) at less computational complexity (overall delay by 40%), Increasing the bandwidth and reducing the errors..

2025

Um dos grandes desafios dos estudantes do ensino superior, em particular aqueles cujas bases de formacao ou a motivacao vocacional nao se encontram consolidadas, e encontrarem equilibrios entre as suas apetencias formativas, os conhecimentos e capacidades detidas, a descoberta de maior autonomia individual, a integracao numa nova comunidade, as novas relacoes com a Escola e meio exterior e a melhor forma de se automotivarem. Face a esta situacao, bem como a outras a que sao confrontados durante o periodo de aulas, os estudantes acabam por gerar situacoes de desmotivacao, por vezes associando alguma ansiedade e inadaptacao funcional/organizacional que induz a falta de assiduidade e perturbam o processo de ensino-aprendizagem e, consequentemente, o sucesso escolar e/ou abandono escolar. Verificando-se que este problema ganha significado no ensino superior e gera efeitos perniciosos nas instituicoes de ensino, torna-se determinante conhecer as causas de falta de assiduidade e indagar s...

2025, Encontro De Pesquisa Em Educacao

Museus são instituições promotoras de atividades de cunho educativo, que visam despertar o interesse da sociedade para os mais diversos temas, divulgando uma cultura científica que não está presente, ou não é percebida, no cotidiano de muitos de nós. Para atingir seu público, as equipes museais lançam mão de diversas atividades e recursos que colocam o visitante como sujeito em um processo de descoberta, que o permitem interagir com a exposição e descobrir o que está por trás dela. Os jogos digitais se mostram como possíveis potencializadores do papel educativo dos museus por apresentarem características que permitem a interação do visitante, ao mesmo tempo em que o envolve em um contexto que traz um recorte da realidade. Neste estudo, propomos a criação de um game para fins de divulgação científica em um museu, levando em consideração as características que são destacadas por pesquisadores da área de aprendizagem baseada em jogos como sendo importantes para que os jogos digitais sejam atrativos e interessantes. Apresentamos aqui os resultados preliminares da criação de um jogo digital para fins de divulgação científica no Museu de Biodiversidade do Cerrado, Uberlândia -MG, analisando a complexidade das interações entre os diferentes envolvidos neste processo e as modificações que o recurso sofreu no contato com diferentes profissionais, através de uma análise descritiva e interpretativa de cada fase dessa construção. Palavras-chave: Game. Divulgação científica. Museu de Biodiversidade do Cerrado.

2025

In this article, we present the challenges faced by communication networks in delivering high-quality video content to mobile and stationary devices serving CDN users. Starting with Content Distribution Network types, an overview is given in order to show how this field develops on the research as well as on the commercial side. Research or academic CDNs, new aspects and features are tested to add scalability and functional features to known systems and prototypes. On the other hand, commercial CDNs serve alternatively customers that use broadcasting services. We also show which performance metrics such as quality of experience (QoE) and time to first byte (TTFB) best capture the dynamics of traffic and services in CDNs. The core of this paper is our proposed network architecture for CDN providers/operators. The architecture combines video multicast optimized trees and cross-layer coordination between the physical DWDM layer (L1) and network layer (L3) for achieving higher efficiency and lower latency values for live streaming and on demand (VoD) video. Due to the pilot implementation of the presented concept being limited in scale, we use simulations in order to perform proof-of-concept on a sufficiently large environment. Results show that there is a strong correlation between the TTFB and QoE metrics with the former taking on values as low as 75 msec in a national 3-tier network. Ultimately, our aim is to familiarize readers with the field of CDNs and also to help them see how network research especially in the architectural, protocol design, and cross-layer design help bring applications in this field to a quality level acceptable by a large community of users.

2025, Anais do XV Congresso Brasileiro de Pesquisa e Desenvolvimento em Design - P&D Design

Este estudo investigou práticas inovadoras no design e produção de livros, revistas e outras publicações que utilizam do meio digital e não possuem os mesmos limites das publicações físicas convencionais. Por meio de uma busca exploratória, 39 resultados foram encontrados, categorizados e filtrados. Após, realizou-se um estudo de múltiplos casos, por meio do qual se analisaram seis tecnologias: Calibre, CoWriter, Issuu, Twine, HedgeDoc e OMP. Os resultados indicam que as ferramentas tendem a ser de fácil acesso, com foco na colaboração e publicação online, se utilizando de recursos como linguagens de marcação e inteligência artificial para auxiliar no design e na produção. Com isso, as ferramentas permitem a criação de publicações interativas e multimídia, explorando as potencialidades do meio digital, fazendo uso de diferentes tecnologias para tal. Finalmente, o estudo contribui para a compreensão de diferentes práticas inovadoras neste campo e abre caminho para pesquisas futuras que explorem outros achados.

2025

Tesis Univ. Granada. Programa Oficial de Doctorado en Tecnologias de la Informacion y la Comunicacion

2025, Zeszyt Naukowy Wyższej Szkoły Zarządzania i Bankowości w Krakowie

Wszechobecność ekranów sprawiła, że o współczesnej kulturze i formacji społecznej mówi się odpowiednio: kultura ekranów lub społeczeństwo ekranów i monitorów. Ekran stał się nową kategorią kulturową i doczekał swoistej typologii. 1 W Słowniku Wyrazów Obcych znaleźć można trzy sposoby opisywania tego pojęcia. Po pierwsze, ekran to płaszczyzna, na którą rzutuje się obrazy świetlne, np. filmy czy przeźrocza; po drugie, termin ten funkcjonuje na oznaczenie składowej telewizyjnego kineskopu, i wreszcie, jako przesłona zabezpieczająca, np. użytkownika komputera przed niekorzystnym promieniowaniem 2 lub na określenie współcześnie spotykanych -ekranów przy drogach i autostradach -chroniących mieszkańców przez hałasem. Ekran rozdziela dwa światy: realny i wirtualny, jest bramą do tego ostatniego, a także chroni użytkownika przed całkowitą immersją w alternatywną rzeczywistość. Przestrzeń egzystencji człowieka jest nasycona różnymi typami ekranów, co powoduje, iż niektórzy badacze widzą w nich nową kategorię kulturową, natomiast współczesną formację społeczną określają wręcz społeczeństwem ekranu. Pokolenie ponowoczesnych globalnych nastolatków to -z uwagi na ciągłe użytkowanie przez nich mediów audiowizualnych -"ekranolatki" (od angielskiego słowa screenagers) 4 ; natomiast relacje międzyludzkie to coraz częściej relacje między ekranami rozmaitych technologii komunikacyjnych, za którymi ukrywają się ludzie uwikłani w określone konteksty społeczne. Wystarczy wskazać na ekran bankomatu, telewizora, laptopa, ifona, czy nawet telefonu komórkowego. Każdy z nich zastępuje bezpośrednią rozmowę z pracownikiem różnych instytucji społecznych i z prywatnymi osobami, narzuca nową technologiczną przestrzeń i

2025, Parrots Media Magazine

The magazine was published in commemoration of the World AIDS Day 2022, and it gives insights from different individuals, Parrots UG Online Newspaper journalists on advocating for HIV/AIDS Free Generation.

2025

The advent of 5G technology has introduced unprecedented opportunities for enhancing mobile network performance, driving the need for innovative solutions to meet the demands of diverse services. Vertical network slicing, a key feature of 5G architecture, allows operators to create multiple isolated and optimized virtual networks, each tailored to specific applications and user requirements. This paper explores the role of vertical network slicing in optimizing 5G performance by examining its impact on resource allocation, quality of service (QoS), and service delivery. By leveraging the flexibility of slicing, operators can allocate network resources more efficiently, ensuring higher throughput, reduced latency, and improved reliability for different verticals such as IoT, industrial automation, and enhanced mobile broadband. The study also highlights the challenges associated with vertical slicing, including network orchestration, inter-slice interference, and security considerations. Furthermore, the paper evaluates the potential of vertical slicing in supporting emerging technologies like AI, autonomous vehicles, and smart cities. The findings demonstrate that vertical network slicing is pivotal in unlocking the full potential of 5G networks, offering tailored solutions that address the specific needs of diverse sectors while ensuring optimized performance and scalability.

2025, Folklore of Malin Kundang

This paper explores the use of technology in teaching reading, which is one of the fundamental skills in language learning. Technology has brought significant changes to education, particularly through the use of reading applications and digital platforms. This study highlights how digital tools can enhance students' learning experiences by offering interactive, adaptive, and gamified features that support engagement and comprehension.
By reviewing relevant literature, this study demonstrates how technology facilitates reading processes, from vocabulary development and text comprehension to learning outcome assessments. Additionally, challenges in implementing technology, such as educators' digital literacy and equitable access to resources, are also discussed to provide a more comprehensive perspective.
This research argues that technology can not only improve students' reading skills but also address some of the challenges often encountered in traditional teaching methods. Thus, this paper provides practical guidance for educators to effectively utilize technology in teaching reading.

2025

This document describes D2.2 of the Internet Next Generation project. Internet Next Generation is a project performed within the context of the Gigaport programme, and is funded by many organizations within the Netherlands. Details of the Internet Next Generation project can be obtained from . The architecture that is described within this document explains how customers of a Differentiated Services (DiffServ) network can manage the service that is provided by them, by reading and modifying QoS parameters in an interactive way. Which parameters are available and which values these parameters can take, is defined in the Service Level Specification (SLS), which is part of the Service Level Agreement (SLA). The form of management in which customers can modify the behaviour of the provided service is called Customer Service Management (CSM); the idea that customers can manage the behaviour of the provided service is not only interesting in case of DiffServ, but also in cases like Mobile IP, IP security or Virtual Private Networks (VPNs).

2025

Introduction Speech Processing is the study of speech signals and the processing methods of these signals. The signals are usually processed in a digital representation, so speech processing is regarded as a special digital signal processing. Digital signal processing (DSP) is concerned with the representation of discrete time signals by a sequence of numbers or symbols and the processing of these signals. DSP includes subfields like audio and speech signal processing. In sound processing the MFC (Mel-Frequency Ceptrum) is used to represent the short-term power spectrum of sound. It is based on a linear cosine transform of a log power spectrum on a non-linear Mel scale of frequency. Mel-Frequency Ceptral Coefficients (MFCC) are the co-efficients that collectively make up an MFC. The MFCC values are usually normalized in speech recognition systems to lessen the influence of noise as these values are sensitive to the additive noise. VQ (Vector Quantization) is a data compression metho...

2025

This paper presents an approach to the development of a speaker independent, continuous word Speech Recognition System for a large vocabulary. The feature extraction is based on Mel-scaled Frequency Cepstral Coefficients (MFCC) and template matching employs Dynamic Time Warping (DTW). In general, efficiency of the speech recognition system in noise free environment is impressive. But, in the presence of environmental noise the efficiency of the speech recognition system deteriorates drastically. As an attempt to overcome this drawback, Spectral Subtraction (SS) is used for de-noising the speech signal before feature extraction and Convolutional Noise Removal is performed after feature extraction.

2024, Advances in multimedia

This research work designs and evaluates synchronized second screen interactive digital media using Moving Picture Experts Group Dynamic Adaptive Streaming over HTTP (MPEG-DASH). Second screen technology involves the use of a computing device, such as a smartphone or tablet, to provide an enhanced viewing experience for content on another device. The study design uses a structured format for defining MPEG-DASH inline events to trigger the second screen events. Furthermore, the ability for users to make choices that impact the story was implemented by generating several manifests and enabling the trigger manifest to refresh after each question. By performing a formal subjective user experiment, this study assesses the Quality of Experience (QoE) performance of the prototype. The results were positive and strongly indicate a high QoE for the entire system. A secondary result of our work is enhancing the QoE methodology for the assessment of second screen applications. The implemented system can easily be incorporated in the MPEG-DASH standard, allowing support for using the inline event for second screen triggering.

2024

Neste estudo,ambientes de cariz não-formal são desafiados a integrarem ambientes formais de aprendizagem. Como elementos integradores foram desenvolvidas: i) atividades práticas laboratoriais; ii) aprendizagem entre pares; e o iii) questionamento. Esta investigação com bases metodológicas de índole predominantemente qualitativa, foiconstituída comoum estudo de caso.Os resultados apontamque todos estes elementos tiveram influência na integração entre os ensinos não-formal e formal, fazendo a alavancagem dos níveis: cognitivo dos alunos participantes, através da aquisição de conhecimentos e conteúdos formais. Este estudo aponta um caminho possível e válido para a concretização da integração destes contextos, cuja complementaridade acarreta um conjunto de mais-valias, a vários níveis, que dificilmente seriam adquiridas de outra forma. PALAVRAS CHAVE: Questionamento, Atividades laboratoriais, Aprendizagem entre pares. A sala de aula é, por excelência, um contexto de aprendizagem e de ensino formal. Todavia, a Ciência, mais do que um conjunto de disciplinas, é uma área de conhecimento que permite explicar os fenómenos naturais, ou seja, tudo oque nos rodeia, logoa sala de aula não é o único ambiente onde se aprende Ciência, mas o local onde se aprende a ciência escolar, a qual se «supõe essencial para prosseguir estudos científicos e superar os exames externos para tal» (Oliva, Acevedo, & Matos, 2005, p. 52) e que se preocupa, sobretudo, com o currículo e seu cumprimento. Os professores de ciências devem consciencializar-se das mais-valias que os ambientes não-formais podem oferecer ao processo de ensino e de aprendizagem. Acoautora do estudo aqui apresentado, enquanto docente de Ciências Físico-Químicas tem organizado anualmente a iniciativa Laboratório Aberto -LA, nos laboratórios de Química e Física de uma instituição educativa da zona urbana de

2024

A formação de habilidades profissionais no contexto pedagógico é um dos pilares fundamentais para o desenvolvimento de competências essenciais à inserção no mercado de trabalho e à construção de trajetórias profissionais bem-sucedidas. Este estudo busca explorar as diversas abordagens e metodologias utilizadas no âmbito pedagógico para fomentar o desenvolvimento de habilidades profissionais, destacando sua relevância para a construção de uma sociedade mais preparada e competitiva.

2024

Introducao. O uso da tecnologia na educacao e um assunto que sempre esta nas linhas de discussao quando o assunto e metodologia de ensino. Muitos recursos tecnologicos podem ser utilizados como ferramentas no processo de ensino aprendizagem. “As novas tecnologias surgem com a necessidade de especializacoes dos saberes, um novo modelo surge na educacao, com ela pode-se desenvolver um conjunto de atividades com interesses didatico-pedagogica”. (LEOPOLDO, 2004, p.13). As aulas expositivas realizadas em sala de aula sao vistas pelos estudantes apenas uma vez em sua totalidade, e apos isso apenas algumas explicacoes e depois nada mais, o estudante tera que buscar em livros e anotacoes para relembrar a aula. Essa dificuldade que nesse estudo, procuraremos solucionar trazendo uma ferramenta que possa auxiliar o estudante e com isso trazer melhorias na metodologia de ensino e aprendizagem. O uso de recurso audiovisual especificamente videoaula e uma das ferramentas tecnologicas propostas pa...

2024

- Definisi kompresi Video
- Teknik Komppresi Video
- Perbandingan Teknik Kompresi

2024, Conference Paper

The rapid advancement of artificial intelligence (AI) has transformed the field of education globally. AI generative tools hold immense potential to revolutionize the way students of Journalism and Media Studies (JMS) learn and create contents. The recent unbundling of Mass Communication into eight distinct disciplines by the National Universities Commission (NUC) in Nigeria and the introduction Core Curriculum Minimum Academic Standards (CCMAS) aims among others at producing graduates that would be creative, innovative, employable and entrepreneurial in the already competitive and ever-evolving digital landscape. Against this background, the study examined the utilization of AI generative tools to enhance the learning experience of Journalism and Media Studies’ students at Federal University Otuoke, Bayelsa State, Nigeria. Anchored on Digital Generative Media Tool Theory (DGMTT), the study investigated the benefits, challenges, and considerations of using AI generative tools in journalism and media education. The study employed a mixed-method involving survey and in-depth interviews. Findings reveal that AI generative tools hold immense potential for transforming journalism and media studies education by providing students with more opportunities to practice their skills with personalized learning experiences, automating routine tasks, and fostering creativity. Despite the transformative potential of AI generative tools, the study found the challenges associated with their application to include potential biases inherent in AI models, plagiarism risks, and the need for human oversight to ensure ethical and responsible usage. The study recommended that Federal University Otuoke should provide students with access to AI generative tools; offering training and workshops; integrating AI tools into the curriculum; and developing ethical usage guidelines.
Keywords: AI generative tools, Journalism and Media Studies (JMS) education, Federal University Otuoke, Digital Generative Media Tool Theory (DGMTT), Core Curriculum Minimum Academic Standards (CCMAS)

2024

Has the ability to generate human-like text based on a given prompt (Brown et al., 2020).  DeepArt AI generative tool that uses deep learning algorithms to transform photos into artwork (Gatys et al., 2015).

2024

Cognitive Radio (CR) appears as a more attractive solution for the efficient use of the radio frequency spectrum and has gained much interest in the field of research in recent years. Spectrum sensing is the main objective of the cognitive radio and detects the presence of the idle channel of the frequency spectrum. Cognitive radio, an intelligent spectrum sensing technology detects the spectrum holes or white spaces in the spectrum which reallocates this idle spectrum to unlicensed users called Secondary Users (SU) and without causing harmful interference to licensed users called Primary Users (PU). Normally prediction-based channel sensing carried out for the efficient utilization of spectrum for the unlicensed users using different prediction models and probability theory-based algorithms available in the literature. In this paper, we proposed a methodology for the prediction of channel state using Hidden Markov Model (HMM). A comparative analysis is carried out between the proposed technique with that of the traditional spectrum sensing technique and the accuracy of the predictor is established through numerous simulations. From the simulation results, conclusions are drawn and discussed.

2024, Volume 3, Issue 2 (special issue). International Journal of Semiotics and Visual Rhetoric (IJSVR).

Intermedial studies represent an area of research that has evolved mainly from comparative literature. In the United States it started as comparative arts and it later became Interart studies; in Europe, especially in Germany and the Nordic countries, the approach was more general since the beginning, with stronger interest in interactive multi-semiotic phenomena (Clüver, 2007). According to Rajewsky (2005: 44), the recognition of the term “intermediality” to deal with similar phenomena in different areas opened up “possibilities for relating the most varied of disciplines and for developing general, transmedially relevant theories of intermediality.” There are several definitions of intermediality. The great variation found in the form of explanatory strategies, rivals models and basic terminologies reveals that there are open ontological and methodological problems. For Clüver (2011, p. 6), it implies all kinds of inter-relation and interaction between media. How to approach such a broad phenomenon? Clüver stresses the importance of semiotics, asserting that it “has supplied useful concepts and methods in dealing with a number of crucial issues” (Clüver, 2007, p. 20). For Elleström (2010, p. 4), it is important to answer what is a medium before one can deal with what happens between media. Bateman has insisted on the importance of a rigorous treatment on notion of “semiotic mode”. For Müller (2010), one must consider social and historical features of intermedial processes. In fact, there are not unified consistent theoretical models about intermediality, transmediality, multimodality. Historically, scholars interested in intermedial phenomena come from Literary, Media, Communication, General Semiotics and Arts Studies. They tend to privilege the models of their own area. Clüver (2007) and Müller (2010), for example, mention the strong influence literary theory has been imposing on intermedial issues. Marais (see this special issue) submits the whole discussion to the known models in translation studies and semiotics. The topics multiplied to include problems related to (i) the precise definition of the fundamental assumptions and explanatory components, such as the definition of “medium” or “semiotic mode”; (ii) the comparison between rival models and theories, such as social oriented theories versus formal and communication models; (iii) the relation between multimodality, transmediality and intermediality, and so on.

2024

Speech signal processing and voice identification is having its own significance in critical investigation process. Voice signal are non-stationary. Wavelet transforms used for processing non stationary voice signals. Word dependent voice recognition system is proposed with the combination of Relative Spectral Algorithm (RASTA) for signal filtering and linear predictive coding (LPC) for detecting the voice signals. Wavelet coefficients are derived for statistical analysis. The proposed methodology comprises Voice registration process and Voice verification process. This process is simulated using MATLAB. The mean, standard deviation, variance, median statistical parameters are considered to verify the test voice signal with the registered voice signal.

2024, Signal Processing: An International Journal ( …

Extraction and selection of the best parametric representation of acoustic signal is the most important task in designing any speaker recognition system. A wide range of possibilities exists for parametrically representing the speech signal such as Linear Prediction Coding (LPC) ,Mel frequency Cepstrum coefficients (MFCC) and others. MFCC are currently the most popular choice for any speaker recognition system, though one of the shortcomings of MFCC is that the signal is assumed to be stationary within the given time frame and is therefore unable to analyze the non-stationary signal. Therefore it is not suitable for noisy speech signals. To overcome this problem several researchers used different types of AM-FM modulation/demodulation techniques for extracting features from speech signal. In some approaches it is proposed to use the wavelet filterbanks for extracting the features. In this paper a technique for extracting the features by combining the above mentioned approaches is proposed. Features are extracted from the envelope of the signal and then passed through wavelet filterbank. It is found that the proposed method outperforms the existing feature extraction techniques.