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Optimal Frame Transmission for Scalable Video with Hierarchical Prediction Structure  [PDF]
Saied Mehdian,Ben Liang
Computer Science , 2013,
Abstract: An optimal frame transmission scheme is presented for streaming scalable video over a link with limited capacity. The objective is to select a transmission sequence of frames and their transmission schedule such that the overall video quality is maximized. The problem is solved for two general classes of hierarchical prediction structures, which include as a special case the popular dyadic structure. Based on a new characterization of the interdependence among frames in terms of trees, structural properties of an optimal transmission schedule are derived. These properties lead to the development of a jointly optimal frame selection and scheduling algorithm, which has computational complexity that is quadratic in the number of frames. Simulation results show that the optimal scheme substantially outperforms three existing alternatives.
Wireless Transmission of Video for Biomechanical Analysis  [PDF]
Dr. Timur Mirzoev
Computer Science , 2014,
Abstract: When there is a possibility to wirelessly stream video over a network, a sophisticated computer analysis of the transmitted video is possible. Such process is used in biomechanics when it is important to analyze athletes performance via streaming digital uncompressed video to a computer and then analyzing it using specific software such as Arial Performance Analysis Systems or Dartfish. This manuscript presents some approaches and challenges in streaming video as well as some applications of Information Technology in biomechanics. An example of how scientists from Indiana State University approached the wireless transmission of video is also introduced.
Ontology based approach for video transmission over the network  [PDF]
Rachit Mohan Garg,Yamini Sood,Neha Tyagi
Computer Science , 2011, DOI: 10.5121/ijma.2011.3106
Abstract: With the increase in the bandwidth & the transmission speed over the internet, transmission of multimedia objects like video, audio, images has become an easier work. In this paper we provide an approach that can be useful for transmission of video objects over the internet without much fuzz. The approach provides a ontology based framework that is used to establish an automatic deployment of video transmission system. Further the video is compressed using the structural flow mechanism that uses the wavelet principle for compression of video frames. Finally the video transmission algorithm known as RRDBFSF algorithm is provided that makes use of the concept of restrictive flooding to avoid redundancy thereby increasing the efficiency.
Ontology Based Approach for Video Transmission Over the Network  [PDF]
Rachit Mohan Garg,Yamini Sood,Neha Tyagi
International Journal of Multimedia & Its Applications , 2011,
Abstract: With the increase in the bandwidth & the transmission speed over the internet, transmission of multimedia objects like video, audio, images has become an easier work. In this paper we provide anapproach that can be useful for transmission of video objects over the internet without much fuzz. The approach provides a ontology based framework that is used to establish an automatic deployment ofvideo transmission system. Further the video is compressed using the structural flow mechanism that uses the wavelet principle for compression of video frames. Finally the video transmission algorithm known as RRDBFSF algorithm is provided that makes use of the concept of restrictive flooding to avoid redundancy thereby increasing the efficiency.
Computer Simulation of the Transmission Channel Influence in the Video Signal
M. Pistek,V. Ricny
Radioengineering , 1999,
Abstract: This article contains the time-spatial and spectral description of video signals. There are described methods for computer simulations of real transmission channels and for determination of their influence upon the video signal and the quality corresponding picture.
Stereo Video Transmission Using LDPC Code  [PDF]
Rui GUO, Lixin WANG, Xiaoxia JIANG
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2008, DOI: 10.4236/ijcns.2008.13031
Abstract: Stereo video is widely used because it can provide depth information. However, it is difficult to store and transmit stereo video due to the huge data amount. So, high efficient channel encoding algorithm and proper transmission strategy is needed to deal with the video transmission over limited bandwidth channel. In this paper, unequal error protection (UEP) based on low density parity check (LDPC) code was used to transmit stereo video over wireless channel with limited bandwidth. Different correction level LDPC code was used according to the importance of video stream to reconstruction at the receiver. Simulation result shows that the proposed transmission scheme increases the PSNR of reconstructed image, and improves the subjective effect.
WiMAX Based Audio/Video Transmission
Irfanullah,Amjad Ali,Abdul Qadir,Rehanullah Khan
International Journal of Computer Science Issues , 2013,
Abstract: In this article, we present the idea of a WiMAX based audio/video transmission. The data transmitter will transmit an audio/video signal, which will be received by the receiver side. The hardware of the data transmitter consists of a CCD camera and audio mic. The CCD camera will capture the image and give the analog video signal to a fixed filter of 12 MHz. The filter is designed in such a way that it can only pass a signal of 12 MHz and 4 KHz audio signal. The analog signal is given at the base of C1815 transistor, which will amplify this analog signal. To remove the unwanted signals, we have used capacitors. The amplified signal is then passed through a capacitor of capacitance 504 pf. the output signal at the capacitor is than pass through an RF amplifier. The RF amplifier will give strength and power to the signal. In RF amplifier section we have used a variable tuned circuit. The inductor used at the RF amplifier section act as antenna that will transmit the video signal and audio to the air.
Layered Video Transmission on Adaptive OFDM Wireless Systems
Dardari D,Martini MG,Mazzotti M,Chiani M
EURASIP Journal on Advances in Signal Processing , 2004,
Abstract: Future wireless video transmission systems will consider orthogonal frequency division multiplexing (OFDM) as the basic modulation technique due to its robustness and low complexity implementation in the presence of frequency-selective channels. Recently, adaptive bit loading techniques have been applied to OFDM showing good performance gains in cable transmission systems. In this paper a multilayer bit loading technique, based on the so called ordered subcarrier selection algorithm, is proposed and applied to a Hiperlan2-like wireless system at 5 GHz for efficient layered multimedia transmission. Different schemes realizing unequal error protection both at coding and modulation levels are compared. The strong impact of this technique in terms of video quality is evaluated for MPEG- video transmission.
Optimisation of Video-Data Transmission in Telematic System  [cached]
Emilia Bubenikova,Peter Holecko,Rastislav Pirnik
Advances in Electrical and Electronic Engineering , 2013,
Abstract: The goal of this paper is to analyse, define, and summarise the requirements on networks connecting telematic technologies based on Intelligent Transport Systems (ITS). The paper describes the methodics of setting and a general concept of technological networks interface based on available and applicable standards Focus is set on optimisation of data transmission in the form of a video-stream and its tunnelling through xDSL transmission technology. The implementation of the designed compression algorithm and interface between open and technological-type networks is described. The summary describes a proposed subjective method for quality evaluation of transmitted video-flow for the needs of telematics supervision systems dispatchers.
Interactive Video Coding and Transmission over Heterogeneous Wired-to-Wireless IP Networks Using an Edge Proxy  [cached]
James W. Modestino,Yong Pei
EURASIP Journal on Advances in Signal Processing , 2004, DOI: 10.1155/s1687617204308073
Abstract: Digital video delivered over wired-to-wireless networks is expected to suffer quality degradation from both packet loss and bit errors in the payload. In this paper, the quality degradation due to packet loss and bit errors in the payload are quantitatively evaluated and their effects are assessed. We propose the use of a concatenated forward error correction (FEC) coding scheme employing Reed-Solomon (RS) codes and rate-compatible punctured convolutional (RCPC) codes to protect the video data from packet loss and bit errors, respectively. Furthermore, the performance of a joint source-channel coding (JSCC) approach employing this concatenated FEC coding scheme for video transmission is studied. Finally, we describe an improved end-to-end architecture using an edge proxy in a mobile support station to implement differential error protection for the corresponding channel impairments expected on the two networks. Results indicate that with an appropriate JSCC approach and the use of an edge proxy, FEC-based error-control techniques together with passive error-recovery techniques can significantly improve the effective video throughput and lead to acceptable video delivery quality over time-varying heterogeneous wired-to-wireless IP networks.
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