The 3-stage encoder/decoder of the proposed VTR-SISO-OFDM system. Figure 1 represents the proposed 3-stage (a) encoder/ (b) decoder in the proposed VTR-SISO-OFDM system. The proposed 3-stage encoder in Figure 1a consists of source data, mapping functions, and the side information. We utilize a specific switch to select different transmission rates. For the proposed 3-stage decoder in Figure 1b, the source data is reconstructed using reversible mapping functions and the side information.