外文翻譯----視頻會(huì)議通過(guò)tcpip協(xié)議在個(gè)人電腦上的實(shí)現(xiàn)-wenkub
2023-05-19 11:21:43 本頁(yè)面
【正文】 ing hardware and software is not standard on most PC’s. Installation must occur at the user site. Generally, PC’s vary significantly with different hardware and software installed on each PC. Even an experienced installer can encounter a new situation on a particular user’s PC. All versions of Windows Windows , Windows for Workgroups , Windows 95, the uping “Memphis”, and Windows NT are built on a plex system of operating system ponents and vendorsupplied device drivers. Some device drivers manage actual hardware devices such as video display adapters, video capture boards, sound cards, and work interface cards. Other device drivers share many properties with the hardware device drivers but implement TCP/IP protocols and other software features of the system. Device drivers are extremely powerful as they access the hardware and software at a privileged level in all versions of Windows. Even in Windows and Windows 95, which can allow applications to overwrite memory within the operating system or other applications, device drivers operate at a privileged level which allows the drivers to do even more damage than an application. Because of this device drivers can cause severe problems, inexplicable crashes, and strange conflicts between devices. Most configuration and installation problems involve the device drivers. While it is impossible to anticipate the many situations that will be encountered in the field, this document provides an overview of the installation and configuration issues for videoconferencing systems on PC’s over TCP/IP works. Video Display Videoconferencing systems make heavy use of the PC’s video display: video adapter card and video drivers. Video display drivers can contain subtle bugs that can conflict with applications, including the videoconferencing applications, causing many problems including general protection faults and updating problems on the screen. In general, make sure to have the latest drivers for a video card. Most major video card and video chip vendors provide drivers on their Web sites and ftp sites. Use the video card drivers rather than generic video chip drivers where possible. For example, for Diamond Multimedia video cards, both Diamond and S3, the manufacturer of the video chips used in the Diamond Multimedia video cards, provide video drivers. Diamond has substantially enhanced the drivers for Diamond cards over the drivers provided by S3. It can be very unclear that a faulty display driver is the cause of a problem in a PC. The digital video standards used in videoconferencing such as and work in the YCrCb color space rather than the RGB color space used by video cards and monitors. The latest generations of video chips provide hardware color space conversion. The chip converts the decoded video from the YCrCb (luminanceco
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