人们对多媒体经常有一个错误的概念,似乎认为一台电脑配备了声卡和光驱就能算得上多媒体了,其实这个想法大谬不然。也就是说,一台能让你输入声音,输入图象甚至视频并经过处理输出的电脑才是真正的多媒体电脑。图象和视频最关键的就是采集的问题,我们身边一般都有些视频源,可怎样把它们和电脑连接在一起呢?视频采集卡是一种解决方案,但存在的问题也不少,使用视频卡需要有较强的计算机基础,你得开机安装、设备,还要解决各种各样的软硬件冲突。而且好的视频采集卡大多价格不菲,一般用户尤其是家庭用户显然是很难接受的。近来市场上又出现了一种外接式的摄像头,不用插卡,实时采集视频信号。但这类设备作为网上可视电话尚可。但它不能连接其它的视频设备,功能比较单一,效果也不尽人意。事实上,人 People often have a wrong concept of multimedia, it seems that a computer equipped with a sound card and optical drive can be regarded as multimedia, in fact, this idea is wrong. That is to say, a computer that lets you input sound, input video and even video and output it is the real multimedia computer. Video and video is the most crucial acquisition problems, we generally have some video sources around, how can they be connected with the computer? Video capture card is a solution, but there are many problems, the use of video Card needs a strong computer foundation, you have to start the installation, equipment, but also to solve a wide range of hardware and software conflicts. And good video capture cards are mostly expensive, the average user, especially home users is clearly difficult to accept. Recently there has been an external camera on the market, no card, real-time video signal acquisition. However, this type of device is still acceptable as an online videophone. But it can not connect to other video equipment, the function is relatively simple, the effect is not satisfactory. In fact, people