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The harmonic broadcasting using time-divided video data method that is suggested in this paper first by receiving the data segments and merging the sub-segments in order. With this the occupied resource is reduced by 11%, and the processing load is cut down by 32%, which are the advantages of this process. Accordingly, the resource occupation and the processing load, which have been the factors behind...
Application Layer Forward Error Correction (AL)-FEC is increasingly being employed in the emerging wireless multimedia applications, where the multimedia data is sent along with repair data that can be used at the receiver to recover any losses. Raptor codes and Random Linear Codes (RLC) have emerged as promising rateless coding solutions. The DVB-H standard has adopted Raptor codes for IP datacasting,...
Parallel structures may be used to increase a system processing speed in case of large amount of data or highly complex calculations. Dynamic Voltage and Frequency Scaling (DVFS) may be used for simpler calculations in order to decrease the system voltage or frequency and achieve lower power consumption. Combining these two mechanisms may lead to higher efficiency and lower power consumption. In this...
This paper is dedicated to the analysis of object identification under desynchronization distortions. While this class of degradations is almost unavoidable in the functionality of such systems especially at the verification stage via acquisition imperfections, currently available their performance limits do not take its impact into consideration. In this paper we will try to close this gap providing...
This paper evaluates the performance of FASTAR code in Multimedia Broadcast Multicast Service (MBMS) System. It is demonstrated that FASTAR code, which is optimised for erasure channel through its overhead minimising degree distribution, can improve the system performance compared to the conventional systematic Raptor code. The system is simulated under the Evolved UMTS Terrestrial Radio Access (E-UTRA)...
This work discusses a fast generation procedure of authentication codes, for multimedia content cryptography, whose length (and computational complexity) can be tuned accordingly to the specific mobile application and service. In this work, we propose a digital algorithm to generate a pair of long (asymmetric) keys from one short primitive key. According to our results, the devised procedure provides...
This paper propose an efficient interconnect interface, which has been applied in reconfigurable multimedia system (REMUS). In order to achieve high performance of data share between multi cores, this interconnect interface applies overlapping operation mechanism in memory. Test of H.264 HiP (High Profile) decoding shows that the data exchange rate achieves a speedup of 285% compared with the AHB...
In this paper, an AVS-embedded multi-format video decoder is presented. It integrates AVS JP@L6.2, H.264 HP@L4.2, VC-1 AP@L3, and MPEG-2 MP@HL in a single chip and features resources sharing, memory management, and early-stage acqusition to facilitate cost and bandwidth efficiency. For the applications of broadcasting, an adaptive error concealment method is proposed. A chip is fabricated and integrates...
Scalable video coding (SVC) is the extension of the H.264/AVC standard. Because of the variety of video transmission systems, storage systems and computing capabilities, video bit stream need to adapt the various needs of different terminals and network conditions, while SVC is a highly attractive solution to the problems above, it provides network-friendly scalability at a bit stream level with a...
In this paper, the implementation of a DSP based video decoder compliant with the H.264/SVC standard (14496-10 Annex G) is presented. A PC-based decoder implementation has been ported to a commercial DSP. Performance optimizations have been carried out improving the initial version performance about 32% and reaching real time for CIF sequences. Moreover, conformance tests have been done using different...
SECMPEG selectively encrypts data to protect MPEG video streams. However, this scheme is inefficient because it encrypts the whole I-frames whose size is relatively larger than B/P-frames. In this paper, we propose a more efficient selective encryption approach which exploits the error propagation property in MPEG2 standard. Our experimental results show that the proposed approach can reduce the execution...
This paper describes a system for the distribution of content over multicast and broadcast media that uses network coding techniques for concealing packet losses from the applications, improving the received Quality of Service. We propose a systematic network code designed for this purpose, analyze the performance of the code, comparing it with a standard approach based on random linear network coding,...
There's a gap in consumer communications on how networks, devices, and services handle and identify space & time in media resources in the Web. W3C's Media Fragments URI specification, which we edited and contributed to over the last couple of years, not only bridges this gap by homogeneously opening up time-related media to the Internet crowd, but also makes time-related annotation feasible for...
The impact of variability on sub-45nm CMOS multimedia platforms makes hard to provide application QoS guarantees, as the speed variations across the cores may cause sub-optimal and sample-dependent utilization of the available resources and energy budget. These effects can be compensated by an efficient allocation of the workload at run-time. In the context of multimedia applications, a critical objective...
Multimedia applications are expected to form the largest portion of workload in general purpose PC and portable devices. The ever-increasing computation intensity of multimedia applications elevates the processor temperature and consequently impairs the reliability and performance of the system. In this paper, we propose to perform dynamic thermal management using reinforcement learning algorithm...
We propose a contents-aware multicast (CAM) scheme in rate adaptive wireless networks. In CAM, transmission rate is determined depending on the contents type. That is, base layer packets are transmitted by the lowest rate for higher reliability. On the contrary, enhancement layer packets are sent by higher transmission rates. Moreover, enhancement layer packets are combined with base layer packets...
The Third Generation Partnership Project (3GPP), recently introduced the evolution of the third generation (3G) cellular networks, the Long Term Evolution (LTE) telecommunication system. A key aspect of LTE specifications is the enhancement of Multimedia Broadcast/Multicast Services (MBMS), where the same content is transmitted to multiple users located in a specific service area. A significant point...
Rateless codes such as LT codes have become more and more popular due to their abilities to handle varying channel conditions without much feedback. However, rateless codes have the drawback of unable to provide intermediate outputs when delivering layer-coded media content. Although some methods have been proposed to produce intermediate outputs based on adjusting the distribution of LT codes, they...
Recently it has been shown that network coding can highly improve the network throughput in the communication systems and specifically increase the downloading performance in P2P networks. This paper presents a new live streaming system for GIA-based P2P networks. In the proposed system the traditional GIA protocol is improved for an efficient use in multimedia applications. We introduce a new mesh-pull...
This paper proposes a reversible visible watermarking method which are contour style. According to the fact that it has informational redundancy in a nature images usually, it is possible to embed watermarking image in the corresponding area of original image. Based on the cryptography method, users can view the original image after remove the visible watermarking by the proposed method. The proposed...
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