一种高效的前向纠错码桶分配DNA存储解码方法

昝乡镇; 姚翔宇; 许鹏; 陈智华; 石晓龙; 李树栋; 刘文斌

doi:10.11999/JEIT210697

一种高效的前向纠错码桶分配DNA存储解码方法

doi: 10.11999/JEIT210697

1.
广州大学计算科技研究院广州 510006
2.
广州大学网络空间技术先进研究院广州 510006

基金项目: 国家自然科学基金(62072128, 61876047, 62002079)

详细信息

作者简介:
昝乡镇：男，博士生，研究方向为DNA存储、生物信息学

姚翔宇：男，硕士生，研究方向为DNA存储、生物信息学

许鹏：男，副教授，研究方向为DNA存储、生物信息学

陈智华：女，副教授，研究方向为DNA存储、生物信息学

石晓龙：男，教授，研究方向为DNA存储、生物信息学

李树栋：男，副教授，研究方向为DNA存储、网络安全

刘文斌：男，教授，研究方向为DNA存储、生物信息学

通讯作者:
刘文斌　wbliu6910@gzhu.edu.cn

中图分类号: TN918.3
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- 被引次数: 0
出版历程
- 收稿日期: 2021-07-13
- 修回日期: 2021-09-30
- 网络出版日期: 2021-10-26
- 刊出日期: 2022-10-19

An Efficient Bueket-allocation Decoding Method Based on Forward Error Correction Codes for Deoxyribo Nucleicecid Storage

1.
Institution of Computational Science and Technology, Guangzhou University, Guangzhou 510006, China
2.
Cyberspace Institute of Advanced Technology, Guangzhou University, Guangzhou 510006, China

Funds: The National Natural Science Foundation of China (62072128, 61876047, 62002079)

摘要

摘要: 与传统存储方式相比，脱氧核糖核酸(DNA)存储的难点是测序序列中的插入和删除错误给信息解码过程带来了巨大挑战。针对具有1位纠错能力的前向纠错编码DNA存储，该文提出一种桶式分配策略提高解码的精度和效率。首先，搜索每个分组中所有测序读长的可识别DNA码，根据1位纠错能力确定其对应的合法编码；其次，根据每个可识别DNA码在测序读长的位置确定相应编码的最佳编码位置(即桶)；最后，按照众数投票确定每个桶中的最终编码。仿真结果表明在0.10和0.05错误率条件下，平均解码准确率在20X测序深度时可达94%以上；在0.15错误率条件下，平均解码准确率在60X测序深度时可达90%以上。
- 存储解码方法 /
- 脱氧核糖核酸存储 /
- 插入错误 /
- 删除错误 /
- 替换错误
Abstract: Compared with traditional storage, the difficulty of DeoxyriboNucleic Acid (DNA) data storage is that insertion and deletion errors in sequenced reads pose a great challenge to data recovery. For forward error-correcting coded DNA storage with one-base error-correcting capability, a bucket allocation strategy is proposed to improve the decoding accuracy and efficiency. Firstly, all identifiable DNA codes of reads in each cluster are searched and the corresponding valid codes according to the one-base error-correcting capability are determined; Then, for each identifiable DNA code, appropriate coding position (i.e. bucket) according is allocated to its position in a read; Finally, the consensus code for each bucket is determined using majority voting strategy. Simulation results show that the proposed method can correct more than 94% errors at the coverage of 20X when error rate is 5% or 10%, and correct more than 90% errors at the coverage of 60X when error rate is 15%.
- Storage decoding method /
- DeoxyriboNucleic Acid (DNA) storage /
- Insertions error /
- Deletions error /
- Substitutions error

HTML全文

图 1 DNA存储序列结构示意图

下载: 全尺寸图片幻灯片

图 2 桶式分配纠错策略示意图

下载: 全尺寸图片幻灯片

图 3 3种分组策略性能比较

下载: 全尺寸图片幻灯片

图 4 解码过程的平均正确率与平均运行时间

下载: 全尺寸图片幻灯片

表 1 编码表

DNA编码	字母	标点符号	数字	DNA编码	字母	标点符号	数字
TAACCG	a	@	4	ACACAC	l		6
TAAGGC	p	￥		ACTCTG	i	"	5
ATCACG	e	$	2	TCAGAG	j	%
ATGAGC	y	,	8	ACAGGT	x	}{
ATGGAG	g	*		ACTGCA	f	~	9
TACCAC	k	/		AGACCT	s	+	0
ATCCGT	b	()		TCTCGT	h	-
ATGCCA	v	:		TCGAAC	c	?	1
TAGCGA	r	'	3	ACGACT	o	!
TAGGCT	t	[]		CATTCG	z	&
ACATCG	w	;		CTACAG	q	=
ACTTGC	n	.		CAACGT	d	__
TCTACG	m	Enter		CAGACA	u	#	7
TGCATA	大写键			GTATGA	标点符号键
CTTGTC	数字键			CGGTAT	空格键

下载: 导出CSV

表 2 与其他方法的比较

文献	纠错策略	是否插入/删除？	测序深度(X)	错误率(%)	数据恢复准确率	存储方法
文献[20]	HEDGES	是	50	3	1.000	体外
文献[21]	莱文斯坦码	是	NA	1	0.900	体外
文献[22]	德布莱茵图	是	60	10	0.920	体外
文献[23]	3层纠错机制	是	20	5	0.905	体外
文献[25]	否	否	2740	≤2	0.998	体外
文献[26]	否	否	NA	≤2	1.000	体内
本文方法	桶式分配纠错	是	20	5	0.970	体外
			20	10	0.940
			60	15	0.906

下载: 导出CSV

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