Adaptation of transmission bit-rate for video multicasting is a challenging problem because of heterogeneous client speed and variable bit-rates.Prior approach based on leader based schemes to achieve the video multicasting for the node that experiences the worst channel condition .However ,this could affect the other nodes that can receive a higher throughput. Our goal is to provide clients heterogeneous visual quality matching their channel conditions .we providing differentiated video quality for various clients to match their heterogeneous channel conditions and guaranteeing minimum visual quality for each client. Specifically, our goal is to develop a software-based rate scheduling protocol in order to produce the maximal total visual quality for quality-differentiated video multicast under the constraint of ensuring at least minimum visual quality for each member.
Keywords: modulation, multicast, Quality Differentiated Multicasting(QDM),transmission bit-rates ,leader based protocol
I. INTRODUCTION
In this paper we have found a way to transmit the video to different multirate system in a wireless network connection such that every client node gets the video streaming with a effective quality without any data loss using a technology called QDM(Quality differentiated multicast) and LBP(Leader Based Protocol).
II. SYSTEM ANALYSIS
Due to the heterogeneity among multicast members, different multicast recipients may observe dissimilar link qualities. Recently, several works have focused on how to allocate bandwidth efficiently for broadcasting video streams to clients either with heterogeneous resources, e.g., screen resolution or decoding capability, or with multiple...
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...ives at least a minimum video quality. In addition, the two-state rate-adaptation scheme in QDM can adapt the rate to network dynamics and variable video bit rates with a reduced sampling overhead.
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After compression, the structure data, audio and video must be multiplexed. A number of compressed TV signals are combined by a multiplexer and put unto a shared transition medium. This is done by one of the two possible kinds of multiplexers that result in either a transport or a program stream, which is suited for secure transmission paths since it can contain large amounts of information. In addition multiplexing can be done using various methods. Time division multiplexing allocates a distinct time interval for each channel in a set; with the help of synchronization and a fixed interval order the channels take turns using the common line.
The streaming devices are on the rise and it is fastest emerging customer market. Every application now comes with an add on feature to cast the videos using the streaming devices on their TV’s or laptop. Currently, there are many options available for using streaming devices.
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A high speed Internet connection is required to stream video. The Netflix Help Center recommends an Internet connection speed of 5.0 Megabits per second (Mbps) for HD video ("Internet Connection Speed Recommendations") Today most American households have access to broadband speeds capable of high-definition video. According to Anne Neville of the National Telecommunications and Information Administration, 98% of Americans have access to broadband speeds of six megabits per second and 83% to speeds of twenty five Mbps or more (Neville). These speeds are more than adequate for HD quality video streaming. With the current broadband initiatives in place this should continue to improve in coming years, along with the possibility of even greater speeds. Beginning in November 2013, Cox Communications began offering increased Internet connectio...
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