Service-Oriented Multimedia Delivery in Pervasive Space

Abstract

Service composition is an effective approach for largeDue to the device heterogeneity, user mobility and scale multimedia delivery. One of the challenge issues is how to instability of pervasive environment, it is a challenge to choose services to build a multimedia delivery path from source construct a multimedia service path to deliver the QoS-assured to destination based on user's requirements. In previous works, multimedia data to end user as the context changes. To user's requirement is represented as one fixed functional path terminal users, delay and media quality (e.g. image pixel, frame which is composed of several functional components in a certain rate) mainly affect their viewing experience. Intuitively, low order. Actually, there may be several functional paths (deliver delay and high quality media is perfect. However, these two different quality level multimedia data, e.g. image pixel, frame factors have opposite to each other. High quality media means rate) that can meet one request. And due to the diversity of the large amount of data transmission which results in higher devices and connections in pervasive environment, system should delay. On the other hand, high quality media is not always the choose a suitable media quality delivery path in accordance with best choice, because the quality of image is also limited by the context, instead of based on one fix functional path. This paper display device. To a high pixel video, a low pixel display proposes LDpath which aims at delivering multimedia data to end users with lowest delay. It chooses services to build delivery device has to discard redundant data which costs computing path hop-by-hop and the generated path matches one of the resources. In a pervasive computing environment, most mobile possible functional paths, which essentially achieves the context devices (e.g. cellphone, PDA, MP4 player) have limited aware multimedia delivery. Furthermore, the amount of data computing resources, low bandwidth connection and a transmission deeply affects delay, thus, LDpath considers data relatively small screen. Generally, to delivery media data to volume changing as one of the metrics of service selection. these mobile devices in a pervasive environment by instableExperimental results show that LDpath is an effective approach connection, delay is a major factor to be considered.for multimedia delivery in pervasive space.In multimedia composition system, some multimedia

Context-Aware Multimedia Processing System in a Pervasive Environment

“…The random algorithm arbitrarily chooses a subsequent service that satisfies the media quality requirement such that a service path can be composed eventually in a hop-by-hop manner. In addition, the LDpath algorithm (the previous version of CMpath) [11] and the strictrandom algorithm (s-random) are also employed for a performance comparison. Both LDpath and s-random generate the service paths strictly according to the functional graph without considering the non-functional instances.…”

“…Our previous work LDpath [11] has conquered the first limitation by considering multiple candidate functional paths to achieve lowest delay. The above analysis motivates us to extend LDpath by incorporating the non-functional services into the functional graph and achieving a joint optimization to meet both requirements of media quality and the low delay.…”

Mobile Multimedia Communications

“…This platform includes both the operating system and the frameworks and libraries needed for developing iOS compatible applications. All these stuff is only available inside the iOS developer program [28] in which you have to be registered to access the information, forums, tools, SDK, etc. All these stuff is only available inside the iOS developer program [28] in which you have to be registered to access the information, forums, tools, SDK, etc.…”

A binary graph reduction algorithm for multi-constrained QoS routing

“…And service oriented architecture (SOA) is considered as a effective way [17] [16] [12] to deliver real-time multimedia data. In a SOA based multimedia delivery system [16][10] [9] [18], multimedia service components (e.g., image compression, subtitle embedding, logo adding) are deployed in different computing nodes over the wide-area Internet and there are several service replicas for each service component. A key problem is how to choose service replicas to construct a path that satisfies multiple QoS constraints to deliver the multimedia data, and QoS routing technology could effectively build such a delivery path.…”