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STB概述 STB(Set-Top-box)起源于上个世纪90年代初,当时在欧美有线电视网已建成和完善,有条件收视已成为保护节目版权和收取服务费的主要手段。有线电视台在每台用户TV之前加一个密钥盒,只有交付了费用的用户才能拥有电视台授权的密钥把电视信号去加扰,得到正常的图像。如果用户旁路掉这个盒子,就只能看见被干扰的图像和声音。直至今天,这种STB仍在广泛使用着,这就是最初的机顶盒。
STB Overview Set-Top-box (STB) originated in the early 90s of last century when cable networks in Europe and America were completed and perfected. Conditional viewing has become the main means to protect program copyright and collect service fees. Cable TV station in front of each user TV key box, only the cost of the user can have the television authorized key to the TV signal scramble to get the normal image. If the user bypassed the box, he could only see the disturbed image and sound. Until today, this STB is still widely used, which is the original set-top box.