Brain Computer Interface (BCI) helps in processing and extraction of useful information from the acquired brain signals having applications in diverse fields such as military, medicine, neuroscience, and rehabilitation. BCI has been used to support paralytic patients having speech impediments with severe disabilities. To help paralytic patients communicate with ease, BCI based systems convert silent speech (thoughts) to text. However, these systems have an inconvenient graphical user interface, high latency, limited typing speed, and low accuracy rate. Apart from these limitations, the existing systems do not incorporate the inevitable factor of a patient's emotional states and sentiment analysis. The proposed system EmoWrite implements a dynamic keyboard with contextualized appearance of characters reducing the traversal time and improving the utilization of the screen space. The proposed system has been evaluated and compared with the existing systems for accuracy, convenience, sentimental analysis, and typing speed. This system results in 6.58 Words Per Minute (WPM) and 31.92 Characters Per Minute (CPM) with an accuracy of 90.36 percent. EmoWrite also gives remarkable results when it comes to the integration of emotional states. Its Information Transfer Rate (ITR) is also high as compared to other systems i.e., 87.55 bits per min with commands and 72.52 bits per min for letters. Furthermore, it provides easy to use interface with a latency of 2.685 sec.
翻译:脑计算机界面(BCI)有助于处理和提取从获得的大脑信号中有用的信息,这些信号应用于军事、医学、神经科学和康复等不同领域。BCI被用于支持有严重残疾言语障碍的麻痹性病人。为帮助麻痹性病人进行轻松的交流,BCI系统将静语(想法)转换成文字。但是,这些系统有一个不方便的图形用户界面、高悬浮度、有限的打字速度和低准确率。除了这些局限性外,现有系统没有包含患者情感状态和情绪分析的不可避免的因素。提议的EmoWrite系统安装了一个动态键盘,字符的外观背景化减少了曲时间,改善了屏幕空间的利用。为准确性、方便性、感性分析和打字速度,对该系统进行了评估和比较。这个系统的结果是6.58个Words Permine(WPM)和31.92字符Pronic(CPM),精确度为90.36%。EmoWrite系统在将情感状态和情绪状态整合时也得出了显著的结果。与字符背景化的外,其信息传输速度速度率(ITR)与每平方平方之间提供高。