It is the non-weighted code and it is not arithmetic codes. The excess-3 codes are obtained as follows − Example Gray Code The Excess-3 code words are derived from the 8421 BCD code words adding (0011) 2 or (3)10 to each code word in 8421. It is non-weighted code used to express decimal numbers. The Excess-3 code is also called as XS-3 code. The examples of non-weighted codes are Excess-3 code and Gray code.

In this type of binary codes, the positional weights are not assigned. In these codes each decimal digit is represented by a group of four bits. Several systems of the codes are used to express the decimal digits 0 through 9. Each position of the number represents a specific weight. Weighted binary codes are those binary codes which obey the positional weight principle. The codes are broadly categorized into following four categories. Since only 0 & 1 are being used, implementation becomes easy. Advantages of Binary Codeįollowing is the list of advantages that binary code offers.īinary codes are suitable for the computer applications.īinary codes are suitable for the digital communications.īinary codes make the analysis and designing of digital circuits if we use the binary codes. The binary code is represented by the number as well as alphanumeric letter. This group is also called as binary code. The digital data is represented, stored and transmitted as group of binary bits. The group of symbols is called as a code.

In the coding, when numbers, letters or words are represented by a specific group of symbols, it is said that the number, letter or word is being encoded.

Arithmetic coding ppt