However , the speed of the storage memory and the data transform between memory and processing units is not as high as the processing units . it becomes the bottlenneck of the system Mpeg - 4asp规定的图像大小为720x576 ，帧率为25fps ，解码过程中的数据量是非常大的，帧存只可能放在片外ram中。
Digital video post - processing ic is designed for consumer video format conversion to attain high quality image , which mainly includes de - interlacing spatial conversions and picture rate conversion 视频后处理芯片可以完成各种格式转换，包括去隔行、空间缩放、帧率变换等等，进一步提高观赏的效果。
I have seen countless posts on this and other message boards , and even personal email has been sent to me , all asking the same question : how do i make it so my stupid objects move at the same speed if the frame rate rises or drops 在各种论坛以及我收到的个人邮件里，很多人都问我相同的一个问题：我是怎样让我游戏里那些物体以相同速度运动，而无论帧率是下降还是上升？
The analysis of physical layer performance is mainly about harq and amc . first discuss the implemention of physical layer . then in front to simulation results , we can find their advantages in cell throughput and ber or fer 本文的物理层性能分析围绕harq和amc技术展开,在分析物理层实现方案后给出仿真结果,分析harq和amc技术分别对系统吞吐量的贡献,以及对误码率和误帧率的优化,发现他们的优势。
The main task of our project is to design a high - resolution and real - time image acquisition and processing system which can process the high images timely the fpga chip is the main controller and the main processor of the system based on pci bus 本课题给出了一种基于高速pci总线、以fpga为核心处理器和控制器的高分辨率实时图像处理系统,该系统可实现对高分辨率高帧率图像( 1024 * 768 @ 60hz )的实时采集、处理以及输出。
First , in this paper , powercontrol technology is discussed , including its principle , methods of realization and status of research . then reverse outer - loop power controlarithmetic based on fer ( frame error rate ) measurement and adaptive variablestep - size inner - loop power control arithmetic are proposed . the simulation is doneand the result shows the deviation is smaller using the arithmetic fortracking the idealfer 然后在此基础上给出了基于误帧率fer ( frameerrorrate )测量的反向外环功率控制优化算法和自适应变步长内环功率控制算法,计算结果表明,与传统的外环算法相比本文模型化的算法对目标fer的跟踪具有较小的误差。
According to the information that reflected the condition of channel , this thesis classified acm into heuristic acm and snr - estimation acm . the system that using the first one of acm decide the scheme of modulation and coding according to the frame error ratio that reflected indirectly the condition of channel , while it using the another of acm decide the scheme according to the snr estimation 根据反映信道状态的信息不同,本文将自适应编码调制技术分为基于探索的自适应编码调制技术和基于信道信噪比预测的自适应编码调制技术,前者根据间接反映信道条件的误帧率和重传次数信息来决定编码调制方式,而后者根据信道信噪比预测的结果调节编码调制方案。
With the development of the computer technique and the multimedia technique , digital image processing has already been widely used in such fields as communication , biomedicine , monitor and control , remote sensing telemetering measurement , spaceflight aviation , military and information safety etc . in these systems of digital image processing , a question is put forward on how to process a large amout of image data 随着计算机技术和数字多媒体技术的不断发展,数字图像处理技术被广泛应用于通信、生物医学、监控、遥感遥测、航空航天、军事、信息安全等领域中。在这些数字图像处理系统中,一个突出的问题就是对海量图像数据的实时处理,特别是在对图像的分辨率和帧率要求比较高的场合下,仅仅采用专用视频处理芯片、专用视频信号处理器或通用的高性能数字处理芯片,均无法取得令人满意的效果。
According to the result of the fpga verification , the design of the usb2 . 0 ip is absolutely up to the mustard . especially , the frame rate of the image transfer system is faster 25 times based on the usb2 . 0 interface than the usb 1 . 1 interface , so the interface bottleneck between the pc and peripheral devices is drastically eliminated 值得一提的是，目前采用嵌入usb2 . 0接口ip的图像传输系统与以前嵌入usbi . 1接口ip的产品相比，将图像传输的帧率提高了近25倍，彻底解决了以往pc与外设之间的图像传输瓶颈问题。
Embedded technologies , multi - way technologies and sampling technologies are used to reduce the sampling rate by software , so that the system can provide appropriate image format according to the condition of network and can eliminate aliasing noise . the system also uses motion detection to control the frame rate . therefore , the system can save transmission bandwidth effectively and design to provide multiple degrees qos according to the network condition 本方案采用了嵌入式技术和多路技术,并从采样技术入手,软件调整采样率,使得系统能够根据网络状态提供适当格式的图像,消除欠采样噪声,而且通过运动检测来控制帧率,从而可以有效地节省传输带宽,达到根据网络情况自适应地提供多种qos服务等级的目的。
