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[单选题]
以下对视频设备的描述中，正确的是______。
A
视频设备只能采集视频数据，不能播放视频数据
B
视频采集卡的功能是用于采集视频数据
C
视频采集卡的功能是用于采集音频数据
D
视频设备包括音频采样卡﹑合成器﹑中高频音箱﹑话筒﹑PC的声卡﹑耳机等
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参考答案
试题答案：
B
答案解释：
视频设备主要视频采集卡﹑DV卡﹑电视卡﹑视频监控卡﹑视频压缩卡等，视频采集卡用于采集视频数据。音频采样卡﹑合成器﹑中高频音箱﹑话筒﹑PC的声卡﹑耳机等是音频设备，因此答案是B。
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