دانلود رایگان ترجمه مقاله دسکتاپ و پهنای کم باند برای محیط های نمایش داده شده مشترک – الزویر 2016
دانلود رایگان مقاله انگلیسی تشریح پهنای کم باند دسکتاپ و بخش ویدئویی به همراه ترجمه فارسی
عنوان فارسی مقاله: | تشریح پهنای کم باند دسکتاپ و بخش ویدئویی |
عنوان انگلیسی مقاله: | Low bandwidth desktop and video streaming for collaborative tiled display environments |
رشته های مرتبط: | مهندسی کامپیوتر و فناوری اطلاعات، مهندسی نرم افزار، معماری سیستم های کامپیوتری، مهندسی سخت افزار، شبکه های کامپیوتری و سامانه های شبکه ای |
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نشریه | الزویر – Elsevier |
کد محصول | f270 |
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بخشی از مقاله انگلیسی: 1. Introduction Tiled display environments offer high resolution display resources at a scale unparalleled by other display technologies. These higher resolution display surfaces allow for larger datasets to be visualized on larger workspaces and support new modes of collaboration among users. Several techniques currently exist for filling the high pixel count with certain types of data, but challenges still exist for displaying many types of content on tiled display environments, such as a wide range of desktop applications and tools that researchers are already familiar with, and sharing content from multiple sources which are external to the display environment. While projects like the OptiPortal research initiative [1] that are developing cost-effective tiled display wall technology from commodity components aim to increase access to tiled display walls, wide spread adoption of tiled display environments willnot occur until users can access and visualize their data in a way that they are familiar with. Despite the benefits higher resolution display walls provide, an interim solution is necessary until these tiled display walls support all of the visualization functionality researchers need. Until now a popular solution has been to stream remote content directly from rendering nodes in an uncompressed format that requires high bandwidth interconnects. The high bandwidth required for this streaming limits the types of devices that can provide content, as well as the total resolution and update rate of the content streamed. To address the issue of high speed network dependence we present a new framework for streaming remote content to tiled display environments using low latency H.264 video compression. The use of video compression on a video stream significantly reduces the required bandwidth and network resources which provides several improvements over uncompressed streaming. Real-time video streaming capabilities become accessible to a new class of bandwidth constrained devices such as wireless laptops. Also, the number of concurrent video streams that can be sent over existing high speed network infrastructure is increased, allowing collaboration with multiple concurrent content streams on a network with a 1 Gbps bandwidth or significantly less. This paper describes the implementation of a complete endto-end system for streaming desktop content to tiled display walls as outlined in Fig. 1. It also addresses the challenges of streaming compressed video to a tiled display wall including acquisition of a range of source content, extremely low-latency video encoding, efficient network transport over heterogeneous wide area networks, video decompression, and visualization on a tiled display system. Also addressed is the issue of mobility, allowing the users to dynamically reposition and resize each video stream anywhere on the tiled display wall without interruption. The presented framework provides support for the acquisition and display of a variety of desktop and video content, allowing users the freedom to visualize and collaborate on tiled display walls with conventional desktop applications, HD video cameras, video game consoles, and almost any device which outputs to an HDMI or DVI interface. In the following sections we describe the components of the system that make this possible and present a performance analysis between streaming of uncompressed RGB pixel streams, single frame compressed streams, and H.264 compressed streams. We are able to demonstrate that using the system outlined in this paper, H.264 compressed video streams provide a higher frame throughput, lower end-to-end latency, and require significantly less bandwidth than uncompressed RGB streams while providing a higher quality and lower bandwidth usage than competing realtime single frame compression approaches. |