Download Broadband Mobile Multimedia: Techniques and Applications by Yan Zhang, Shiwen Mao, Laurence T. Yang, Thomas M Chen PDF

By Yan Zhang, Shiwen Mao, Laurence T. Yang, Thomas M Chen

Multimedia carrier provisioning is thought to be one of many must haves to assure the luck of next-generation instant networks. interpreting the position of multimedia in cutting-edge instant platforms and networks, Broadband cellular Multimedia: suggestions and functions offers a suite of introductory options, basic concepts, the most recent advances, and open matters during this very important zone.

Divided into 4 sections, the quantity starts off with an advent to varied broadband instant multimedia platforms. utilizing video as an software instance, it then specializes in the routing and cross-layer layout factor of multimedia communique over multihop instant advert hoc and sensor networks. the following part discusses concerns with regards to multimedia communications over WLANs—a dominant a part of today’s broadband instant entry networks. The booklet concludes with contemporary advancements in quality-of-service (QoS) provisioning mechanisms and different permitting applied sciences, together with middleware, mobility administration, scheduling, and gear regulate.

With quite a few illustrative figures and vast references, this beneficial technical consultant offers in-depth remedies of easy themes, a high-quality review of state-of-the-art advances, and a consultant sampling of vital learn results.

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Extra info for Broadband Mobile Multimedia: Techniques and Applications (Wireless Networks and Mobile Communications)

Example text

Between these two situations, one of the different encoding modes with different rates is selected. The rate estimation does not involve motion compensation and hence is necessarily inaccurate if motion compensation is used at the decoder. Further, the flexibility of the decoder is restricted. 3 System Software and Middleware The development of efficient and flexible system software to make functional abstractions and information gathered by scalar and multimedia sensors available to higher-layer applications is one of the most important challenges faced by researchers to manage complexity and heterogeneity of sensor systems.

Congestion control. Multimedia data rates are typically in the order of 64 kbit/s for constant bit rate voice traffic, whereas video traffic may be bursty and approximately 500 kbit/s [43]. Although these data generation rates are high for a single node, multiple sensors in overlapped regions may inject similar traffic on sensing the same phenomenon, leading to network congestion. The Event-to-Sink Reliable Transport (ESRT) protocol [44] leverages the fact that spatial and temporal correlation exists among the individual sensor readings [45].

The main design objectives of a coder for multimedia sensor networks are thus High compression efficiency. Uncompressed raw video streams require high data rates and thus consume excessive bandwidth and energy. It is necessary to achieve a high ratio of compression to effectively limit bandwidth and energy consumption. Low complexity. Multimedia encoders are embedded in sensor devices. Hence, they need to be of low complexity to reduce cost and form factors, and of low power to prolong the lifetime of sensor nodes.

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