檢視前向错误更正的原始碼

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|<center>'''前向错误更正'''<br><img
src="https://ts1.cn.mm.bing.net/th/id/R-C.a794cc0dd40369bfe33bb62a02da87eb?rik=GeFD7p%2bERfEyfw&riu=http%3a%2f%2fwww.itavcn.com%2fpic%2fnews%2f201106%2f20110615%2fimage%2flxh0615023.jpg&ehk=CJeG%2fmOxvtWRH%2bpbMZ3r%2b3RIxlpzaJ0wKymlmISryrU%3d&risl=&pid=ImgRaw&r=0&sres=1&sresct=1" width="280"></center><small>  圖片來自youku </small> 
|}
'''单向通信系统中控制传输错误的技术'''

前向纠错（英语：forward error correction，缩写FEC）或信道编码（英语：channel coding）是一种在单向通信系统中控制传输错误的技术，通过连同数据发送额外的信息进行错误恢复，以降低[[比特误码率]]。FEC又分为带内FEC和带外FEC。FEC的处理往往发生在早期阶段处理后的数字信号是第一次收到。也就是说，纠错电路往往是不可分割的一部分的模拟到数字的转换过程中，还涉及数字调制解调，或[[线路编码]]和[[解码]]。