  Semantic communication technology is regarded as a method surpassing the
Shannon limit of bit transmission, capable of effectively enhancing
transmission efficiency. However, current approaches that directly map content
to transmission symbols are challenging to deploy in practice, imposing
significant limitations on the development of semantic communication. To
address this challenge, we propose a hybrid bit and semantic communication
system, named HybridBSC, in which encoded semantic information is inserted into
bit information for transmission via conventional digital communication systems
utilizing same spectrum resources. The system can be easily deployed using
existing communication architecture to achieve bit and semantic information
transmission. Particularly, we design a semantic insertion and extraction
scheme to implement this strategy. Furthermore, we conduct experimental
validation based on the pluto-based software defined radio (SDR) platform in a
real wireless channel, demonstrating that the proposed strategy can
simultaneously transmit semantic and bit information.
