电脑配上电视卡,可以收看电视,其中包括有线电视和其它视频信号。目前电视卡成本较高,没有良好的性价比,大部分电脑用户觉得电脑配电视卡的实际意义不大,故电视卡普及速度比较慢。 电视卡又称TV卡,可分三大类:一是单纯的插卡型,二是在显示卡基础上,增加一块电视信号接收子卡的升级型,三是独立的机外供电型。 早期电视卡均以插卡型方式出现,功能较单一,接收电视信号的灵敏度也不尽如人意。所有操作均由软件控制,使用不太方便,特别是安装更显麻烦,在设备较多的系统上,经常会出现“地址”和“通道”等硬件资源冲突。再有,电视卡一千余元的价位居高不下,更令家庭用户失去了兴趣,因为二千元就能买一台很不错的21英寸彩电了。总之,除了某些特殊用途外,早期的电视卡多少给人一种画蛇添足的 Computer equipped with a TV card, you can watch TV, including cable television and other video signals. The current TV card cost is higher, there is no good price, most computer users feel that the actual value of the computer with a TV card is not, so the TV card popularity is relatively slow. TV card, also known as TV card, can be divided into three categories: First, a simple plug-in type, the second is based on the graphics card, add a TV signal to receive sub-card upgrade, the third is an independent power supply type. Early TV cards are card-type way to appear more single-function, the sensitivity of receiving television signals are not satisfactory. All operations are controlled by software, which is inconvenient to use. In particular, it is more troublesome to install. In a system with more devices, hardware resource conflicts such as “address” and “channel” frequently occur. Moreover, the high price of a TV card of more than a thousand dollars makes home users lose interest more because they can buy a very good 21-inch color TV set at $ 2,000. In short, in addition to some special purposes, the early number of TV cards gives a superfluous