Techniques for synchronous retrieval of concurrent multimedia I/O streams
نام عام مواد
[Thesis]
نام نخستين پديدآور
M. F. Khan
نام ساير پديدآوران
A. Ghafoor
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
Purdue University
تاریخ نشرو بخش و غیره
1996
مشخصات ظاهری
نام خاص و کميت اثر
109
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
Purdue University
امتياز متن
1996
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
I/O has traditionally been a limiting factor in the performance of modern high-performance computer systems consisting of CPUs, memories, secondary storage devices, user interfaces, and the network. This I/O bottleneck becomes even more pronounced for currently evolving systems handling digital multimedia, such as audio and video data. In this dissertation, we study the characteristics of multimedia data, and based on these characteristics, we study and develop efficient techniques for the storage and synchronous retrieval of such data. We propose methods to quantify user perceived quality via QOP (quality of presentation) parameters. We combine QOP and OCPN (object composition petri-net) multimedia data modeling techniques to develop techniques to allow efficient synchronous retrieval of multimedia data. Since I/O bandwidth is a precious resource, we develop methods for the allocation of I/O bandwidth among several concurrent multimedia I/O streams. These methods are fair among users and make judicious utilization of the I/O bandwidth. Inter-media and intra-media temporal synchronization at the user-interaction level is an essential concern in multimedia systems. In order to effect such synchronization, we propose several usdO(n\ \log\ n + mn)usd (where m is the number of logical I/O channels and n is the number of frames of multimedia data) heuristics to schedule multimedia frames between the disks and destination memories of the multimedia systems. We study the performance of these heuristics via simulations and show the tradeoffs between the system resources, such as memory, and QOP parameters. Finally, we identify promising avenues for future advances in multimedia I/O.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Applied sciences
موضوع مستند نشده
bandwidth
موضوع مستند نشده
Computer science
موضوع مستند نشده
object composition
موضوع مستند نشده
petri net
موضوع مستند نشده
quality of presentation
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )