نتایج جستجو برای: digital video broadcasting
تعداد نتایج: 481335 فیلتر نتایج به سال:
The promising video coding standard, H.264/AVC [1], is developed by the Join Video Team of ITU-T Video Coding Experts Group (VCEG) and ISO/IEC Moving Picture Experts Group (MPEG). By utilizing several new techniques, such as advanced intra predictions, variable block size ME, integer transformation, in-loop deblocking filter, H.264/AVC has achieved significant compression gain compared with pre...
We present a new video broadcasting protocol called the scalable preloading broadcast protocol. This protocol provides cost effective access times to viewers by using a scalable preloading method. The new protocol reduces the video stream management complexity as well as the required broadcasting bandwidth. To demonstrate the benefit of new protocol, we perform various simulations to compare it...
Abstract— In OFDM based single frequency networks (SFNs) used in digital audio broadcasting (DAB) and digital video broadcasting (DVB) the received signal can be a superposition of multiple useful and interfering lognormal components. In many cases considerable correlations exist among these components. These correlations are typically neglected in the system analysis. In this paper we show tha...
This paper deals with the second part of the latest digital TV standard DVB-SH (Digital Video Broadcasting – Satellite to Handhelds) with focus on utilization of its advantages for the next generation of mobile TV broadcasting. In the second part the simulation model of DVB-SH-B, which is using satellite configuration with TDM (Time Division Multiplexing) transmission mode, is presented. The wo...
Orthogonal frequency division multiplexing is a type of multicarrier modulation technique which is used in wireless communication. OFDM can be used in various wireless and wired application such Digital audio broadcasting, digital video broadcasting & wireless LAN. The Performance of OFDM system depends on various parameters such as using different transform, different modulation and by putting...
Video-on-demand (VoD) systems that can serve hundreds to thousands of concurrent users are already widely available. However, to deploy metropolitan-scale VoD services for potentially tens of millions of users, current VoD systems are still limited in capacity, and expensive in cost. To tackle this challenge, this study proposes a new periodic broadcasting scheme, called Constrained Consonant B...
With the growth of broadband networks, Video-on-Demand (VoD) has become realistic. Many significant broadcasting schemes have been proposed to reduce the bandwidth requirements for stored popular videos, but they cannot be used to support live video broadcast perfectly. Herein, we propose a new broadcasting scheme, called the Adaptive Live Broadcasting (ALB) scheme, which supports live video br...
امروزه گسترش زمینه های کاربرد تصاویر ویدیویی دیجیتال باعث افزایش تقاضا برای ذخیره این نوع داده ها در حافظه محدود یا ارسال آنها در پهنای باند محدود شده است. این نیاز روزافزون، لزوم فشرده سازی داده های مربوط به تصاویر ویدیویی را مطرح می نماید. روشهای فشرده سازی موجود که از تخمین حرکت برای حذف افزونگی زمانی بین فریم های متوالی تصاویر ویدیویی استفاده می کنند، بر اساس تقسیم تصویر به بلوک یا شبکه عمل...
There is a need for real-time copyright logo insertion in emerging applications, such as Internet protocol television (IPTV). This situation arises in IP-TV and digital TV broadcasting when video residing in a server has to be broadcast by different stations and under different broadcasting rights. Embedded systems that are involved in broadcasting need to have embedded copyright protection. Ex...
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