Demodulation device, processing device, reception device, and data processing method

A data processing method by a reception device including demodulation circuitry configured to demodulate a received broadcast signal to generate demodulated data and supply the demodulated data to error correction circuitry, which is configured to error correct the data supplied from the demodulation circuitry and supply the error-corrected data, as a first transmission packet, to a predetermined interface, the data processing method comprising:

• by the predetermined interface, outputting a divided packet to processing circuitry, the divided packet being obtained by dividing the first transmission packet, which is a variable-length packet used in a first transmission method into a packet length according to a size of a second transmission packet, which is a fixed-length packet used in a second transmission method, arranging at least a portion of the first transmission packet in a payload, and adding, to the payload, a header including information for restoring the first transmission packet, wherein a length of the header varies depending on whether or not a head of the first transmission packet is included in the payload of the divided packet;
• and
• by the processing circuitry, processing the first transmission packet restored from data arranged in the payload based on information included in the header of the divided packet input from the predetermined interface.