Holographic data storage (HDS) can access data in a short amount of time and can also quickly transmit data because HDS records and reads data in units of pages. Thus HDS is regarded as a promising candidate for future optical recording storage systems. Conventional storage systems such as CD, DVD, and HDD have one-dimensional (1D) inter-symbol interference (ISI). However, HDS has a 2D ISI that degrades performance. In this study, to avoid and overcome the 2D-ISI problem, the authors propose a 14/16 modulation code for 4-ary HDS systems which represents 2 bits on each pixel. The proposed 14/16 modulation code allows a bit of unwanted ISI cases in order to raise the code rate, but it has a higher code rate but similar performance compared to a 3/4 modulation code that has no unwanted ISI cases.

中文翻译：

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用于减少二维符号间干扰的4进制14/16调制码

全息数据存储（HDS）可以在短时间内访问数据，并且还可以快速传输数据，因为HDS以页为单位记录和读取数据。因此，HDS被认为是未来光学记录存储系统的有希望的候选者。诸如CD，DVD和HDD之类的常规存储系统具有一维（1D）符号间干扰（ISI）。但是，HDS具有降低性能的2D ISI。在这项研究中，为避免和克服2D-ISI问题，作者提出了针对4进制HDS系统的14/16调制代码，该代码在每个像素上代表2位。提出的14/16调制码允许一些不想要的ISI情况，以提高编码率，但是与没有不想要的ISI情况的3/4调制码相比，它具有更高的码率，但性能相似。