Receiver and receiving method for receiving data in a broadcast system using incremental redundancy received through a unicast system

摘要

A receiver includes: a broadcast receiver receiving a receiver input data stream segmented into frames, wherein basic codeword portions of codewords are mapped onto the frames, a codeword including at least a basic codeword portion generated from an input data word according to a first code; a data demapper demapping the basic codeword portions; a decoder error correction code decoding the codewords into output data words of at least one output data stream in a regular decoding using the basic codeword portion in a codeword; a check unit checking if the regular decoding of a codeword is erroneous; a unicast request unit requesting, if the regular decoding of a codeword is erroneous, an auxiliary codeword portion of the erroneously decoded codeword for incremental redundancy in an additional decoding; a unicast receiver unit receiving an auxiliary codeword portion of the erroneously decoded codeword.

主权项

1. A receiver comprising:
circuitry configured to
receive an input data stream segmented into frames, each frame including basic codeword portions of codewords mapped onto said frames, each codeword comprising at least one of the basic codeword portions generated from an input data word according to a first code;de-map the basic codeword portions from said frames of the receiver input data stream;decode said codewords into output data words of at least one output data stream in a regular decoding by decoding the at least one of the basic codeword portions;check whether the regular decoding of a codeword is erroneous;when said regular decoding of a codeword is erroneous:
estimate an amount of incremental redundancy that is required to correctly decode the codeword;request through a unicast system an auxiliary codeword portion that provides at least said estimated amount of incremental redundancy, the auxiliary codeword portion being of the codeword in which the regular decoding is erroneous;receive from said unicast system the auxiliary codeword portion; anddecode the codeword in which the regular decoding is erroneous by using the auxiliary codeword portion; andoutput said at least one receiver output data stream segmented into said decoded output data words.