A scaler and method of scaling a data signal. In an example, the scaler may include an offset calculator receiving a data signal including a first signal (e.g., a chrominance signal) and a second signal (e.g., a luminance signal) and determining an initial offset relationship between the first signal and the second signal. The example scaler may further include a scaler core performing a scaling process on the received data signal based on a designated sampling mode and the determined initial offset relationship.