It is important to show that a codeword cannot be a valid codeword because it ensures the accuracy and reliability of the data being transmitted. If an invalid codeword is used, it can result in errors and corruption of the data.
A valid codeword is a sequence of symbols or characters that can be accurately transmitted and decoded without any errors. It follows the rules and guidelines set by the coding system in place.
A codeword can be determined as not valid if it does not follow the specific coding rules and guidelines, such as having the correct number of symbols or characters, or if it contains errors or inconsistencies.
There are several reasons why a codeword may be invalid, such as errors in transmission, incorrect coding or decoding, or the use of an outdated or incorrect coding system.
In some cases, an invalid codeword can be fixed or corrected by identifying and correcting the errors or inconsistencies. However, in other cases, a new codeword may need to be generated to ensure accuracy and reliability of the transmitted data.