Error protection coding methods and devices, error protection decoding devices, digital video recorders, unit storage media and digital video cassettes

摘要

Error protection data encoding for use with rotating head helical scan tape-recording, along with each write track defined in the first code word, is a second reed-solomon defined in the first worded Reed-Solomon code and the second code word. By providing the code. The first and second Reed Solomon codes together form a multiply code format. Each second code word has a sequence of symbols across a plurality of adjacent tracks. The symbols of a single second code word have a substantially constant displacement between adjacent symbols in a direction parallel to the length of the tape and in a direction perpendicular to the length of the tape. Each second code word extends substantially along the length of the track associated with the recording.