基于均匀色彩空间的LED可见光通信调制方法

针对LED可见光通信系统中传输信号容易被人眼感知而导致视觉质量下降的缺陷,提出一种使用均匀色彩空间的数据信号调制方法。首先将非均匀的RGB颜色空间转换到符合人类色彩感知特性的Lab和ULAB均匀色彩空间,并将数据信号嵌入其中;接着使用色差方程来计算色彩变化的幅度,并结合数据信号的误码率来评估通信质量;最后对所提的方法与传统使用YCrCb色彩空间的方案进行了实验对比,结果表明提出的方法通信质量和视觉质量效果更好,色差NBS(0.02-2.0)和误码率(0.006 3-0.07)均能够稳定地保持在较低的数值范围。

LED visible light communication modulation method based on uniform colour space

Aiming at the defect that the transmission signal in the LED visible light communication system is easily perceived by the human eye,which leads to the degradation of visual quality,a data signal modulation method using a uniform colour space is proposed.This method converts the non-uniform RGB colour space to Lab and ULAB,which conforms to human colour perception characteristics,and embeds the data signal into it.Then use the colour difference equation to calculate the amplitude of the colour change,and combine the bit error rate of the data signal to evaluate the communication quality.Finally,the method proposed in this paper is compared with the traditional scheme using YCrCb colour space,the results show that the proposed method has better communication quality and visual quality,and the chromatic aberration and bit error rate are kept in a lower numerical range.