A processing device comprising: a pull-down cadence detector (410; 1222) configured to receive an input video stream (IVS) generated by pulling down raw data from an external device, detect a pull-down cadence format indicating a rate at which the raw data is pulled down based on the input video stream (IVS), and output detection result information (DRI); and a pull-down cadence controller (420; 500; 1230) configured to output an output video stream (OVS) having a second frame rate that is an integer multiple of a first frame rate of the raw data, based on the input video stream (IVS) and the detection result information (DRI), and characterized in that the detection result information (DRI) comprises information indicating a type of the pull-down cadence format, the pull-down cadence controller (420; 500; 1230) is configured to output the output video stream (OVS) by changing a third frame rate of the input video stream (IVS) to the second frame rate when the type of the pull-down cadence format is a non-linear pull-down cadence format, wherein a non-linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is a non-integer multiple of the first frame rate, and by bypassing the input video stream (IVS) when the type of the pull-down cadence format is a linear pull-down cadence format, wherein a linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is an integer multiple of the first frame rate. a pull-down cadence detector (410; 1222) configured to receive an input video stream (IVS) generated by pulling down raw data from an external device, detect a pull-down cadence format indicating a rate at which the raw data is pulled down based on the input video stream (IVS), and output detection result information (DRI); and a pull-down cadence controller (420; 500; 1230) configured to output an output video stream (OVS) having a second frame rate that is an integer multiple of a first frame rate of the raw data, based on the input video stream (IVS) and the detection result information (DRI), and characterized in that the detection result information (DRI) comprises information indicating a type of the pull-down cadence format, the pull-down cadence controller (420; 500; 1230) is configured to output the output video stream (OVS) by changing a third frame rate of the input video stream (IVS) to the second frame rate when the type of the pull-down cadence format is a non-linear pull-down cadence format, wherein a non-linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is a non-integer multiple of the first frame rate, and by bypassing the input video stream (IVS) when the type of the pull-down cadence format is a linear pull-down cadence format, wherein a linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is an integer multiple of the first frame rate. by changing a third frame rate of the input video stream (IVS) to the second frame rate when the type of the pull-down cadence format is a non-linear pull-down cadence format, wherein a non-linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is a non-integer multiple of the first frame rate, and by bypassing the input video stream (IVS) when the type of the pull-down cadence format is a linear pull-down cadence format, wherein a linear pull-down cadence format indicates a pull-down ratio at which the third frame rate is an integer multiple of the first frame rate. <EOS>