Jaime Lloret Mauri

An RTP/RTCP based approach for multimedia group and inter-stream synchronization

Most multimedia group and inter-stream synchronization techniques define or use proprietary protocols with new control messages. Many multimedia applications have been developed using RTP/RTCP as the standard for transmission of multimedia streams over IP networks. Instead of defining a new protocol, we propose the use of RTP/RTCP to provide synchronization. We take advantage of the feedback capabilities provided by RTCP and the ability to extend the protocol by extending and creating RTCP messages containing synchronization information. We have implemented our proposal and tested it in our University WAN. Our experiments have shown that network load resulting from synchronization is minimized and that asynchronies are within acceptable limits for multimedia applications.Most multimedia group and inter-stream synchronization techniques define or use proprietary protocols with new control messages. Many multimedia applications have been developed using RTP/RTCP as the standard for transmission of multimedia streams over IP networks. Instead of defining a new protocol, we propose the use of RTP/RTCP to provide synchronization. We take advantage of the feedback capabilities provided by RTCP and the ability to extend the protocol by extending and creating RTCP messages containing synchronization information. We have implemented our proposal and tested it in our University WAN. Our experiments have shown that network load resulting from synchronization is minimized and that asynchronies are within acceptable limits for multimedia applications.

Multimedia Group Synchronization Algorithm Based on RTP/RTCP

Most of actual multimedia tools use RTP/RTCP for inter-stream synchronization, but not for group synchronization. In this paper we describe and evaluate a proposal of modification of RTCP packets to provide a sender-based method for synchronization of a group of receivers

Multimedia Group synchronization based in standard protocols

Most of actual multimedia tools use RTP/RTCP for inter-stream synchronization, but not for group synchronization. A new proposal of modification of RTCP packets to provide a sender-based method for synchronization of a group of receivers is described and evaluated both objectively and subjectively. The solution takes advantage of the feedback RR RTCP messages and the malleability of RTP/RTCP to provide the information required by the synchronization approach, defining a few new APP RTCP packets useful for synchronization purpose. This modification hardly increases the workload of the network and helps to avoid the asynchronies, between receivers (distributed) and between streams (locally), exceeding the limits, in accordance with the related literature.

The Use of Internet of Things for Smart Cities.

This paper includes the information for the keynote speech of Jaime Lloret.

La coevaluación del equipo versus el resultado académico

En este trabajo se describe la implementacion de un sistema de coevaluacion del trabajo colaborativo de los alumnos como herramienta para medir el nivel de conciencia que los alumnos adquieren del trabajo desarrollado grupalmente, y comparar su percepcion con los resultados academicos obtenidos por el grupo. El docente proporciona una rubrica de evaluacion de la capacidad de trabajo colaborativo del grupo. Con ello se fomenta la reflexion grupal sobre los procedimientos y aptitudes desarrollados en el ejercicio del trabajo colaborativo, y asi fomentar el analisis critico de los individuos como una unidad de trabajo. A traves de esta metodologia se pretende aportar informacion al grupo, y al docente, para conocer mejor la valoracion que el grupo hace sobre sus capacidades y compararlos con los resultados academicos obtenidos. Palabras clave: trabajo colaborativo, coevaluacion, resultados academicos, analisis critico.

Green Communication and Consumer Electronics Sustainability in Delivering Cost Benefit Business Federation in Professional Service Firms

We present the business federation as a new organizational form using insights from business literature as means to tailor make services to clearly defined market segments. We illustrate how professional service firms can achieve economic growth through operating locally within an international network. Within the business federation local offices gain access to resources through an extreme form of delegation as it is not top management that delegates to local offices but rather local units that give top management the permission to handle certain tasks because it is most efficient this way. With these new realities existing strategies do not seem to provide the necessary cure. Firms must constantly innovate using insights from new organizational models.

Green Communication and Corporate Sustainability of Computer Aided Audit Techniques and Fraud Detection

Fraud is prevalent in society and is increasing considerably over in recent years. Auditors have been criticized severally because they tend to reach conclusion based upon inadequate audit processes, and hence, the validity of the audit conclusion has often been questioned. This study thus sought to identify the various types of fraud encountered during financial transactions, evaluate the adoption of Computer Aided Audit Tools (CAATs) in fraud detection in an organization, appraise the impact of CAATs on performance of an organization, and ascertain the problems of CAATs’ application within an organization. Data for the study was collected using a well-structured questionnaire which was distributed among 250 employees of an auditing company. The data were analysed using descriptive statistics and SPSS package, and the hypothesis of the study was analysed using regression analysis. The findings of the study showed that 72.8 % of the respondents agreed that CAATs have played a major role in fraud detection, and hence can be used to curb fraud to a minimal level in organisations. It was also discovered that CAAT helped to improve the auditors’ performance as corroborated by 58.1 % of the respondents. However, quiet a handful of respondents (23.0 %) were undecided in this respect as they claimed that the improved performance has been associated with much stress and pressure. Furthermore, the cost of implementing CAAT, the required skills to be acquired for its usage, and systems database requirements, were some of the problems found to be associated with the application of CAAT in organisations.