摘要 :
A real-time transmission system for digital video materials has been developed for remote editing or making digital archives through high speed networks. In this system a lossless codec has newly developed in which the motion comp...
展开
A real-time transmission system for digital video materials has been developed for remote editing or making digital archives through high speed networks. In this system a lossless codec has newly developed in which the motion compensated prediction coding method is utilized. This codec can he connected to PCI-bus of Workstation, so it becomes general and can he used for any high speed networks such as ATM, Gigabit-Ethernet or Fibre-channel. In this paper, the system configuration and specified lions of lossless CODEC are introduced and they are evaluated via computer simulation and real transmission experiments.
收起
摘要 :
A real-time transmission system for digital video materials has been developed for remote editing or making digital archives through high speed networks. In this system a lossless codec has newly developed in which the motion comp...
展开
A real-time transmission system for digital video materials has been developed for remote editing or making digital archives through high speed networks. In this system a lossless codec has newly developed in which the motion compensated prediction coding method is utilized. This codec can he connected to PCI-bus of Workstation, so it becomes general and can he used for any high speed networks such as ATM, Gigabit-Ethernet or Fibre-channel. In this paper, the system configuration and specified lions of lossless CODEC are introduced and they are evaluated via computer simulation and real transmission experiments.
收起
摘要 :
In this paper, we explore the design of forward error control (FEC)-based error concealment schemes for digital video transmission on ATM networks. In particular, we study the impact of code selection on the overall performance an...
展开
In this paper, we explore the design of forward error control (FEC)-based error concealment schemes for digital video transmission on ATM networks. In particular, we study the impact of code selection on the overall performance and provide a judicious code selection strategy. The use of FEC provides an active and powerful means of recovery from packet loss which is particularly useful when the encoded video material has high motion and scene changes. The best technique for applying FEC is to throttle the source coding rate so that the overall transmission rate after FEC application equals the original unprotected rate. However, the resulting performance then depends on the particular code selected. A well-chosen code provides good protection while allowing little sacrifice in quality and at the same time satisfies specified delay constraints. Our results show that a single code is generally insufficient to provide good performance under all operating conditions. However, a small group of codes can be preselected, using the efficient code-selection strategy described here, which will provide efficient and robust performance over a wide range of channel conditions. We show that this simple code selection strategy is sufficient to select codes judiciously for a wide range of operating conditions and constraints. Employing this selection strategy, we demonstrate that moderate length codes are sufficient to provide good performance while meeting the imposed delay constraint
收起
摘要 :
The present article describes methods of determining the coefficient of visual extinction that are fundamental in the technology of digital processing of video information along with methods of determining the transmission spectru...
展开
The present article describes methods of determining the coefficient of visual extinction that are fundamental in the technology of digital processing of video information along with methods of determining the transmission spectrum in the visible region of optically semitransparent materials. The article is also concerned wtih the case of materials subjected to the action of high-energy optical radiation. The investigations demonstrated that the proposed designs would be useful in estimating the optical properties of materials in aids for the protection of eyes.
收起
摘要 :
In this brief, we propose a newly designed quarter-rate quasi-cyclic low density parity check (LDPC) code for the cloud transmission system. The cloud transmission system requires a near Shannon limit low-rate coding for the next ...
展开
In this brief, we propose a newly designed quarter-rate quasi-cyclic low density parity check (LDPC) code for the cloud transmission system. The cloud transmission system requires a near Shannon limit low-rate coding for the next generation terrestrial digital television system. The proposed LDPC code is optimized for $R={scriptstyle1/scriptstyle4}$. At the code length of 64 K, it is only 0.6 dB away from Shannon limit.
收起
摘要 :
In this paper, we propose a two dimensional (2-D) code based on a vertical low-density parity check (LDPC) code and a horizontal Reed–Solomon code for the cloud transmission system. The proposed 2-D code shows superior performanc...
展开
In this paper, we propose a two dimensional (2-D) code based on a vertical low-density parity check (LDPC) code and a horizontal Reed–Solomon code for the cloud transmission system. The proposed 2-D code shows superior performance under fading channels due to its inherent block-type interleaving feature. Furthermore, the proposed 2-D code can be adaptively decoded to reduce decoding latency and complexity because the vertical LDPC code has raptor-like rate-compatible feature.
收起
摘要 :
The reduction of Non-Revenue Water (NRW) through leakage detection is gaining ever higher significance for well-run water utilities. Tethered leak detection technology has become an essential tool for detecting the presence pinpoi...
展开
The reduction of Non-Revenue Water (NRW) through leakage detection is gaining ever higher significance for well-run water utilities. Tethered leak detection technology has become an essential tool for detecting the presence pinpointing the location as well as estimating the magnitude of leaks in large diameter (300 mm and above) water transmission mains of all pipe materials. For the past 7 years, inline CCTV inspection has also been available for in-service water mains using the Sahara® tethered video inspection system. These two technologies were used independently, which required two surveys for the same pipeline to deliver leak detection and CCTV inspection.
This paper introduces Sahara AV, tethered combined leak detection and CCTV inspection technology designed to deliver multi functions such as leak detection, leak location and CCTV inspection through only one deployment for in-service water mains; recently wall thickness assessment has also been added to the list of technologies which can be mounted on the Sahara system. This paper introduces the Sahara AV system along with its specifications and explains the mechanism adopted to introduce the sensor into the live pipeline. The paper also discusses Sahara case study from Asia describing the benefits and return on investment experienced by clients that have engaged with programs involving Sahara technology.
收起
原文获取