Data processing device and data processing method

A data processing device for processing video data transmitted through a wireless network, the data processing device comprising:

• a bandwidth estimator, configured to estimate a transmission rate of the wireless network;
• a frame composition ratio obtaining unit, configured to obtain a frame composition ratio that indicates a ratio between I frames using intra-frame encoding and P frames using inter-frame predictive encoding, the I and P frames forming a video;
• a temporary redundant packet rate calculator, configured to calculate a number of temporary redundant packets based on the frame composition ratio and the transmission rate estimated by the bandwidth estimator and to calculate a temporary redundant packet rate from the transmission rate and the number of temporary redundant packets;
• an encoding rate calculator, configured to calculate an encoding rate for encoding the video data from the transmission rate and the temporary redundant packet rate;
• a video data processor, configured to encode the video data at the encoding rate and packetize the encoded video data;
• and
• a redundant encoding processor, configured to calculate a number of redundant packets to be added to each frame, which is obtained as a result of processing in the video data processor, and to add redundant packets to each frame, wherein the redundant packets are obtained by performing redundant encoding processing on data packets of the encoded video data.