Binary Data Encoding in Telecommunication Systems
What are the two encoding schemes used in telecommunication systems for efficient and error-free data transmission?
The binary data '10000110000' results in '+0000-+0000' after AMI encoding and '+000+-+-00-' after HDB3 encoding, but what are AMI and HDB3 encoding exactly?
Encoding Schemes Explanation
In telecommunication systems, two common encoding schemes used for efficient and error-free data transmission are AMI (Alternate Mark Inversion) and HDB3 (High-Density Bipolar 3) encoding.
AMI encoding is a bipolar rule that represents binary 0s as 'no change' and binary 1s as changes in the level of voltage. This scheme helps in reducing the average DC component of the signal, making it easier to transmit and receive data without losing synchronization.
On the other hand, HDB3 encoding ensures that no more than three consecutive zeros are sent by replacing sequences of four zeros with specific sequences. This technique prevents long runs of zeros in the data stream, which can cause synchronization issues between the transmitter and receiver.
Both AMI and HDB3 encoding play crucial roles in maintaining data integrity and efficient transmission in telecommunication systems.