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Existing code designs for display-camera based visual communication all have an all-or-nothing behavior, i.e., they assume the entire code must be decoded. However, diverse operational conditions due to device hardware diversity (in camera resolution and frame rate) and distance range motivate more scalable designs. In this paper, we borrow the notion of hierarchical modulation from traditional RF communication, and design Strata, a layered coding scheme for visual communication. Strata candoi:10.1145/2639108.2639132 dblp:conf/mobicom/HuMHXSBS14 fatcat:p4h63lzcn5bspoky36o3dekv64