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This method is also used in Hard Disk and other storage devices. To detect the errors caused in the original signal and reconstruct those signals back to original we use error detection and correction codes. While transmitting a signal from transmitter to receiver, the signal is effected by some noise or other impairments. There are 256 (2 8) different characters and each 8-bit representation is divided into two parts in which 4-bits from MSB are zone bits and 4-bits from LSB are numeric bits. In ASCII table 7-bits are divided into two parts in which 3-bits from MSB are called zone bits and 4-bits from LSB are called numeric bits.Įxtended Binary Coded Decimal Inter Change (EBCDIC) is an 8-bit code which was developed by IBM to operate large computer systems like mainframe. There are 128 (2 7) different characters listed in ASCII table. There are following types of alphanumeric codes exists in digital library:Īmerican Standard Code for Information Interchange (ASCII) is a 7-bit binary code which represents all the lower case letters (a to z), all the upper case letters (A to Z), decimal numbers (0 to 9), all special characters and symbols. These codes are called alphanumeric codes created by some hackers to hide working machine codes which displayed as text. In a computer system there are different types of alphabets (upper case and lower case), numbers, symbols and other mathematical signs which are represented by a standard code. To convert a binary number into gray code, we have to take care of each bit as 1 st bit from MSB is same as binary MSB and N th bit in gray code is the XOR of N and N+1 binary bit from LSB.ħ is a decimal number which is written as 0111 in binary and when converted to grey code is represented as 0100. The counting of gray codes is somewhat different from others as its digits has a difference of only 1-bit as of next number that is the reason it is also called unit-distance code. Gray codes are also non-weighted codes as its value is not dependent on any weights. It is defined as the increment of 3 in its binary units when converted from any other number system.ĩ is a decimal number which is written as 1001 in binary and on adding 0011, it is converted into 1100 which become an excess-3 code. Some of the non-weighted codes are as follows:Įxcess-3 are non-weighted codes which are also called biased representation. The value of any representation can be calculated by multiplying each bit from LSB with the increasing power of 2. Non-weighted codes are those binary representation which are independent of positional weighting. Every representation is a 4-bit binary number which defines the value of a single decimal number, i.e. The weight of the position of these codes are 2, 4, 2 and 1 from MSB to LSB. The value of the binary representation is defined by the sum of multiplication of weight and the binary digit of that position. The weight of the position are 6, 3, 1 and 1 respectively from MSB to LSB. Its weight of the position are 8, 4, 2 and 1 from MSB to LSB. Some of those codes are discussed as below:īinary coded decimal are the codes in which the value of the representation is the sum of weights defined by the position. Weighted codes are those binary representation in which every bit has a certain weight depending upon their specific position. Its capital and largest city is Indianapolis.There are many types of binary codes used in digital number system which are similar to each other but each have individual significance while using them in digital electronics. Indiana is ranked 38th in land area and is the smallest contiguous state west of the Appalachian Mountains. With about 6.3 million residents, it is ranked 15th in population and 17th in population density. It is located in the midwestern region of the United States of America. American, Californian, Eclectic, Healthy, Salads, Sandwiches, VegetarianĪmerican, Barbecue, Cajun, Hamburgers, International, Ribs, SteaksĪmerican, Fast Food, Hamburgers, Sandwiches