ABSTRACT
Differential coding technique has played an important role in image and video coding. Instead of encoding a signal directly, the differential coding technique codes the difference between the signal itself and its prediction. Therefore, it is also known as predictive coding. By utilizing spatial and temporal interpixel correlation, differential coding is an efficient and yet computationally simple coding technique. Transmission error caused by channel noise may reverse the binary bit information from 0 to 1 or from 1 to 0 with what is known as bit error probability, or bit error rate. The effect of transmission error on reconstructed images varies depending on different coding techniques. Channel encoding with an error correction capability was applied to lower the bit error rate. Recognizing the great similarity between consecutive TV frames, a conditional replenishment coding technique was proposed and developed. It was regarded one of the first real demonstrations of interframe coding exploiting interframe redundancy.
