ABSTRACT
To reduce the effect of increasing the number of commands, the multilevel selection is an efficient approach. Besides, Huffman coding, which is an efficient way to generate the structure of multilevel selection, had been widely used in coding applications. Huffman coding can find a minimal prefix code if the probability distribution of source symbol sets is known (Huffman, 1952). Besides, a Huffman coding based binary selection was used to represent the entire text (Roark et al., 2013). To increase the efficient of binary selection, D-ary
1 INTRODUCTION
Motor neuron disease that attacks motor neurons reduces the muscle ability to talk, lift object, and perform some body movements. In the next stages, the patient may lose their ability to pick an object, speak, or walk. Therefore, it make them difficult to perform even the most simple activities, such as talk with other people. Thus, providing an alternative method to communicate with other people will be helpful.
