Patent ID: 7685498

Claim:
A digital broadcasting system for transmitting and receiving, via a network, a broadcast stream created from a broadcast source, the broadcast source including image and audio data and being used for broadcasting, said digital broadcasting system comprising: a coding unit operable to code the broadcast source based on a characteristic of the broadcast source and operable to generate a first layer code and a second layer code from the coded broadcast source, the first layer code and the second layer code, respectively, being for reproduction of the broadcast source; a synthesizing unit operable to generate data bursts, each of the generated data bursts including the generated first layer code and second layer code; a multiplexing unit operable to create the broadcast stream by multiplexing the generated data bursts; a transmitting unit operable to transmit the created broadcast stream to the network; a receiving unit operable to receive the transmitted broadcast stream; a decoding unit operable to extract, from the received broadcast stream, at least one of the first layer code and the second layer code; and a reproducing unit operable to reproduce the broadcast source using the at least one of the first layer code and the second layer code extracted by said decoding unit.