Patent ID: 8467667

Claim:
A video playback device comprising: a plurality of memories including a first memory and a second memory, each of the first and second memories configured to record content data, and to create first packet data and second packet data on a basis of the content data, the second packet data being identical to the first packet data, and one of the first and second memories configured to add a serial number and an IP address added to the first packet data, to output the first packet data added with the serial number and the IP address, to add a serial number and an IP address added to the second packet data, the serial number being the same as the serial number added to the first packet data, and the IP address being different from the IP address added to the first packet data; to output the second packet data added with the serial number and the IP address; and a first switch unit configured to receive the first packet data outputted from the one of the first and second memories, and to output the first packet data to the IP address added to the first packet data; a second switch unit configured to receive the second packet data outputted from the one of the first and second memories, and to output the second packet data to the IP address added to the second packet data; a plurality of decoders including a first decoder and a second decoder, the first decoder including a first port assigned to a first IP address and a second port assigned to a second IP address, the first decoder configured to receive the first packet data by use of the first port, the first packet data outputted from the first switch unit to the first port, to receive the second packet data by use of the second port, the second packet data outputted from the second switch unit to the second port, to decode normal packet data selected from the first packet data and the second packet data which have the same serial number, and to output the decoded data, and the second decoder including a first port assigned to a third IP address and a second port assigned to a fourth IP address, the second decoder configured to receive the first packet data by use of the first port of the second decoder, the first packet data outputted from the first switch unit to the first port of the second decoder, to receive the second packet data by use of the second port of the second decoder, the second packet data outputted from the second switch unit to the second port of the second decoder, to decode normal packet data selected from the first packet data and the second packet data which have the same serial number, and to output the decoded data; and a video switch configured to select one of the data outputted from the first decoder and the data outputted from the second decoder, and to output the selected data to a selected line.