Multimedia group synchronization protocols for integrated services networks

Akyildiz, Ian F.; Yen, Wei

doi:10.1109/49.481702

Cited by 69 publications

(34 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Entre los artículos del segundo grupo podemos destacar [YAV92], [LIT92], [LIT93], [YAV94], [ESC94], [ISH95], [ROT95], [SHI95], [AKY96], [BAQ96], [BIE96], [CHE96], [KOU96], [LAM96], [LIU96], [RAN96], [SON96], [SRE96], [STE96], [YAN96], [ZAR96], [GUE97], [QIA97], [ROT97], [TAS98a], [TAS98b], [XIE99], [GON00], [ISH01a] y [KUO01].…”

Section: Soluciones Particulares Al Problema De La Sincronización De unclassified

“…Entre los del tercer grupo podemos citar [ESC94], [AKY96], [ZAR96], [ISH97], [ISH99], [DIO99], [ISH01a] y [ISH02]. Como se puede apreciar existen trabajos que aparecen en más de un grupo ya que algunos de los algoritmos propuestos en los mismos incluyen varios tipos de sincronización.…”

Section: Soluciones Particulares Al Problema De La Sincronización De unclassified

“…En [AKY96] se plantea la necesidad de la sincronización, tanto en entornos unicast (punto a punto), multicast (punto a multipunto), de recuperación de información y de multipunto a multipunto. Como principales fuentes de asincronía señala el jitter, las desviaciones en las tasas de consumo de los reproductores, los diferentes instantes de transmisión de las fuentes de diferentes flujos y los diferentes instantes iniciales de reproducción.…”

Section: Sincronización Inter-flujo Y De Grupounclassified

See 2 more Smart Citations

Especificación y evaluación de un algoritmo de sincronización de grupo de flujos multimedia

Boronat¹

View full text Add to dashboard Cite

In this thesis an algorithm for Multimedia Group Synchronisation is proposed. It is based on feedback techniques and a global time reference.The algorithm solves the multimedia group synchronization problem in non critical multimedia applications, such as remote learning and telesurveillance. It includes not only inter-stream synchronization but it also guarantees the interreceiver synchronization, playing all the streams at the same time at all receivers.To cite an example, we can consider the remote learning application in which a teacher can send a film to his students and talk about it so they can work interconnected or answer him.The proposed algorithm is based on RTP/RTCP utilization, defining new RTCP data structures or even modifying the existing ones. So the devices in a multimedia application can interchange control information useful for the algorithm. It also considers a global time provided by NTP.The author presents several results from an objective and subjective evaluation. They show that the algorithm works well over point-multipoint and multipoint-multipoint communications, whit several sources and several receivers. ResumenEn la presente Tesis se presenta un algoritmo de sincronización de grupo de flujos multimedia, basado en técnicas de realimentación y la utilización de una referencia de tiempo global común a todos los sistemas involucrados en una aplicación multimedia.Dicho algoritmo trata de solucionar el problema de la sincronización de grupo de flujos en aplicaciones multimedia no críticas como, por ejemplo, las de aprendizaje a distancia o televigilancia. No sólo se ocupa de la sincronización local entre flujos en un mismo receptor, sino que garantiza también la reproducción simultánea (sincronizada), de todos los flujos en todos los receptores al mismo tiempo. Como ejemplo podríamos citar una aplicación de aprendizaje a distancia, en la que, por ejemplo, el profesor o tutor envíe un vídeo de una película (flujo de contenido almacenado) y, al mismo tiempo, en determinados instantes, pueda hacer comentarios (flujo de contenido en directo) sobre las imágenes que se están viendo de la película y los estudiantes discutir dichos comentarios o incluso contestar al profesor.El algoritmo propuesto se basa en la utilización de los protocolos RTP y RTCP, definiendo nuevas estructuras de datos de éste último y modificando algunas ya existentes, para que los equipos que se comunican puedan intercambiar información esencial para dicho algoritmo. También hace uso del protocolo NTP como referencia de tiempo global.Se presentan los resultados de una evaluación del mismo, tanto objetiva como subjetivamente, mostrando un comportamiento satisfactorio sobre configuraciones punto-multipunto y multipunto-multipunto, con varias fuentes y varios receptores de flujos multimedia. ResumAmb aquesta Tesi es presenta un algoritme de sincronització de fluxos d'informació de diferent naturalesa (multimedia), basat en tècniques de realimentació i en la utilització d'una referència de temps global comú a tots el...

show abstract

Section: Soluciones Particulares Al Problema De La Sincronización De unclassified

Section: Sincronización Inter-flujo Y De Grupounclassified

See 1 more Smart Citation

Especificación y evaluación de un algoritmo de sincronización de grupo de flujos multimedia

Boronat¹

View full text Add to dashboard Cite

show abstract

“…In [Aky96], IDMS protocols are proposed for both real-time multimedia applications (e.g., tele-conference, tele-orchestration) and on demand services. The proposed protocols provide synchronization for both one-to-many and many-tomany configurations, and does so without prior knowledge of the end-to-end delay distribution.…”

Section: Spec Layermentioning

confidence: 99%

“…Most of the IDMS solutions have been evaluated in real networked environments, but simulation techniques have also been used in [Aky96], [Num05] and [Rai14], even the IDMS solution proposed in [Dom04] was not evaluated. In some works, network emulators, such as NIST netem [NIST] (in [Has06] and [Hos09]), and data link simulators (in [Ish02]), are used to force specific networking conditions.…”

Section: Taxonomy Of Existing Idms Solutionsmentioning

confidence: 99%

Design, Development and Evaluation of an Adaptive and Standardized RTP/RTCP-Based Idms Solution

Climent¹

View full text Add to dashboard Cite

ii Design, Development and Evaluation of an Adaptive and Standardized RTP/RTCP-based IDMS Solutioniii ABSTRACT Nowadays, we are witnessing a transition from physical togetherness towards networked togetherness around media content. Novel forms of shared media experiences are gaining momentum, allowing geographically distributed users to concurrently consume the same media content while socially interacting (e.g., via text, audio or video chat). Relevant use cases are, for example, Social TV, networked games and multi-party conferencing.However, realizing enjoyable shared media services faces many challenges. In particular, a key technological enabler is the concurrent synchronization of the media playout across multiple locations, which is known as Inter-Destination Multimedia Synchronization (IDMS).This PhD thesis presents an inter-operable, adaptive and accurate IDMS solution, based on extending the capabilities of RTP/RTCP standard protocols (RFC 3550). Concretely, two new RTCP messages for IDMS have been defined to carry out the necessary information to achieve IDMS. Such RTCP extensions have been standardized within the IETF, in RFC 7272. In addition, novel standard-compliant Early Event-Driven (EED) RTCP feedback reporting mechanisms have been also designed to enhance the performance in terms of interactivity, flexibility, dynamism and accuracy when performing IDMS.The designed IDMS solution makes use of globally synchronized clocks (e.g., using NTP) and can adopt different (centralized and distributed) architectural schemes to exchange the RTCP messages for IDMS. This allows efficiently providing IDMS in a variety of networked scenarios and applications, with different requirements (e.g., interactivity, scalability, robustness…) and available resources (e.g., bandwidth, latency, multicast support…). Likewise, various monitoring and control algorithms, such as dynamic strategies for selecting the reference timing to synchronize with, and fault tolerance mechanisms, have been added. Moreover, the proposed IDMS solution includes a novel Adaptive Media Playout (AMP) technique, which aims to smoothly adjust the media playout rate, within perceptually tolerable ranges, every time allowable asynchrony thresholds are exceeded.Prototypes of the IDMS solution have been implemented in both a simulation and in real media framework. The evaluation tests prove the consistent behavior and Mario Montagud Climent iv the satisfactory performance of each one of the designed components (e.g., protocols, architectural schemes, master selection policies, adjustment techniques…). Likewise, comparison results between the different developed alternatives for such components are also provided. In general, the obtained results demonstrate the ability of this RTP/RTCP-based IDMS solution to concurrently and independently maintain an overall synchronization status (within allowable limits) in different logical groups of users, while avoiding annoying playout discontinuities and hardly increasing the computational and traffic load. De...

show abstract

Experiences from the Implementation and Use of Multimedia Synchronization Mechanisms

Bozios

Pronios

Georgiapis

2000

Trans Emerging Tel Tech

View full text Add to dashboard Cite

This paper presents experiences from the implementation of Multimedia Synchronization Mechanisms related to the support ol' the many-to-one inter-media synchronization and describes the proposed Synchronization Architecture and its Dcsign Objectives. The main goal of thc communication system in the proposed architecture is to maintain the asynchrony lcvels between the media streams belonging in a Synchronization Group between the levels speciticd by the Multimcdia Application. This is achieved through appropriate Synchronization Primitives related to the mnnagemcnt and monitoring of the synchronization. The pilper emphasizes on the implcmentation issues and problems, and the solutions adopted. concluding to thc lirst experiences from the use of the synchronization. 24-1 ETT

show abstract

Multimedia group synchronization protocols for integrated services networks

Cited by 69 publications

References 17 publications

Especificación y evaluación de un algoritmo de sincronización de grupo de flujos multimedia

Especificación y evaluación de un algoritmo de sincronización de grupo de flujos multimedia

Design, Development and Evaluation of an Adaptive and Standardized RTP/RTCP-Based Idms Solution

Experiences from the Implementation and Use of Multimedia Synchronization Mechanisms

Contact Info

Product

Resources

About