In order to handle issues about the lost, damaged, or delayed arrival of different modality signals after transmission, the corresponding signal recovery schemes should be designed. Firstly, for haptic-dominant multi-modal services, an audio-visual-aided haptic signal recovery scheme is proposed, while for audio-visual-dominant multi-modal services, a haptic-aided visual signal recovery scheme is presented. The core ideas are to utilize the one modality signal (audio-visual or haptic) to recover the other desired modality signal (haptic or visual) by leveraging their potential correlations. Then, for equally important multi-modal services, a visual-haptic mutual signal recovery scheme is provided, which can be seen as the general case for the two schemes mentioned above. Subsequently, besides these three representative cross-modal signal recovery solutions, information retrieval is another method with fast response and high-reliability characteristics. Under this circumstance, an information retrieval-based signal recovery scheme is designed. Finally, in order to enhance the display quality of the receiver and guarantee human experience, a cross-modal super-resolution reconstruction strategy is proposed, which achieves high-resolution visual signals from the received low-resolution visual signals and the related haptic signals.