A method of encoding video data, the method comprising: generating prediction data of the video data; generating residual data based on the prediction data and digital sample values of the video data; generating coefficients based on the residual data; performing an interlacing process to generate an interlaced amplitude value, wherein the interlacing process interlaces bits of two or more of the coefficients to generate the interlaced amplitude value; modulating an analog signal based on the interlaced amplitude value; generating digital values based on the prediction data; and outputting the analog signal and digital values based on the prediction block.