数字电影视频解压卡驱动程序设计

介绍了2K数字电影视频解压卡的总体硬件结构,并重点介绍了2K数字电影视频解压卡驱动程序设计(包括DMA驱动设计),及其性能测试.     

DCI规范数字电影视频解压卡的WDM驱动设计

以符合数字影院DCI规范的教字电影视频解压卡的驱动程序设计为例,介绍了使用微软公司的DDK和Compuware公司的DdverWorks开发PCI设备WDM驱动程序的方法.包括DriverWorks中PCI设备WDM驱动程序的架构,对于不同类型IO请求的不同处理方法,DMA的过程以及DMA线程之间的同步,以及将驱动程序从单CPU计算机系统移植到多CPU计算机系统的设计要点.实验结果表明,驱动程序能够控制数字电影视频解压卡对符合DCI规范的视频码流进行实时解码,该视频码流速率可以达到DCI规范给出的最大值(250M Bits/sec).     

新型图象解压缩处理器STi3400

概述SGS．THomson公司的STi3400是实时视频图象解压缩处理器，它是多媒体计算机中知名度最高的MPEG－1标准解压卡中的核心器件。这种解压卡与CD－ROM驱动器配合使用，可以播放Video－CD或CD－I光盘中的MPEG电影。MPEG是运动图象专家组（MovingPicturesExpertsGroup）的缩写，它代表了ISO11172号标准，在这个标准中规定了3个方面的内容：MPEG音频。MPEG视频、音频与视频的同步。其中MPEG视频是其核心内容。MPEG有2个标准，现在应用较广泛的是MPEG－1，采用此标准的图象质量介于VHS录象带和LD影碟之间，但具有CD级…     

构建新一代超高清数字电影放映系统

数字电影联盟(DCI)的超高清数字电影标准时数字放映系统提出了极高的要求,我们采用高性能数字信号处理器组和超大规模可编程逻辑阵列构建超高清数字电影放映系统,充分利用系统的信号处理能力,成功地实现了2K和4K两种超高清格式新一代数字电影解码.     

用DVD解压卡打造点歌系统

说起DVD解压卡可能知道的朋友不是太多，这个东东是早期为了低配置的电脑播放DVD节目而开发的一种解压硬件。它的好处是在占用很少系统资源的前提下，流畅地播放DVD视频。由于现在的电脑硬件发展迅速，DVD解压卡很快就成了明日茧花，似乎没有什么用武之地了，所以市面上产品也罕见。不过笔者意外的发现，现在歌厅里的VOD视频点播系统居然是利用DVD解压卡采打造的。[编者按]     

多媒体电脑应用中的两个问题

1.ESS1688芯片声卡驱动程序 一台Compaq PRESARIO 7170多媒体电脑,内置声卡,还配有一块解压卡,跨接解压卡和主板之间的音频和视频接口,可播放CD和VCD。最近由于硬盘出现故障,CD和VCD播放程序丢失,找回解压卡驱动程序,重新安装后可     

软解压五大热点问题释疑

一、软解压最终能取代电影卡吗? 从长远来讲,软解压替代电影卡是大势所趋,但是目前解压卡还有一些解压软件所替代不了的优势,主要有四: 1、不受机型影响的固定播放速度(每秒30帧); 2、不受电脑配置影响的真彩色或高彩色输出; 3、具有视频输出功能,可以连接到电视上播放; 4、解压由卡上芯片完成,不影响CPU正常工作、不占用内存。     

《金山影霸》与国外热门共享解压软件的比较

软解压是94年开始兴起的一种最新多媒体技术,它使得人们无需电影解压卡的支持,只花费极少的资金甚至不花分文(共享软件),就能在电脑上欣赏到效果相当不错的视频电影,给人们提供了新的视听享受。国外共享的解压软件在我国最为流行的主要有XingMPEGPlayerl.3(简称XING),VMPEGl.6a(简称VMPEG)和SoftPEG0.8(简称SOFTPEG)三种(以下统     

DVD不再只是美丽的梦

当MPEG解压卡出现时,我一下就被其绚烂的画面吸引住了,于是勒紧腰带买了一块,当时很威风了一阵。可随着电脑的日新月异,很快便出现了软解压这个解压卡的克星。看着别人用软解压也可以看电影,甚至比解压卡更方便,感觉就象吃了个没熟的柿子。     

基于DirectX的视频采集与处理系统

视频采集与处理一直是人们关注的应用技术热点之一,被广泛应用于许多场合。针对流媒体处理的复杂性和技术性,分析了流媒体应用程序开发所面临的挑战,并深入剖析了DirectShow的应用架构。DirectX的多媒体处理系统——视频采集与处理是基于Microsoft Visual C 6.0开发环境以及Microsoft DirectX SDK 9.0b开发包开发的。基于DirectShow框架开发多媒体应用程序是非常的简单并且支持不同的视频采集设备,实现了多画面的视频采集,视频播放和视频图像处理等功能。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.