Data processing method, data recording apparatus and data transmission apparatus
View Patent ↗Systems and methods for ending, storing and transmitting data generate error correcting code words for data that is provided for each of a plurality of channels. The error correcting code words include data from each of the plurality of channels and the resultant data is rearranged into a plurality of data blocks such that a loss of the rearranged physically adjacent data block reduces an amount of data lost from a common error correcting code word.
1. A data processing method for coding digital data by means of error-correcting codes and allocating them to a plurality of channels, using data blocks of a predetermined length as units, the method comprising:
initially allocating coded data to N channels, the data being arranged consecutively in the channels wherein different error correcting code words include coded data from each of the N channels; and
thereafter rearranging the coded data into blocks of data such that a−1 data blocks arranged consecutively in a channel are from channels or where a data blocks consecutively arranged in a channel are from b−1 channels and are from different error-correcting code words, where N is the number of the channels (N=a×b, where both a and b are integers not smaller than 2).
2. The method according to claim 1 , wherein the error-correcting codes are Reed-Solomon product codes and the data blocks are code words of one of the code series of the Reed-Solomon product codes.
3. The method according to claim 1 , wherein the allocated coded data of N channels are recorded on N recording tracks arranged in parallel with each other on a recording medium.
4. The method according to claim 1 , wherein the allocated data of N channels are transmitted by way of N parallel transmission channels.
5. The method according to claim 1 , wherein the N is not smaller than six.
6. The method according to claim 5 , wherein the N is 8, 9, 16 or 24.
7. A data recording apparatus comprising:
coding means for initially coding digital data by means of error-correcting codes such that each error correcting code word includes data from each of a plurality of data channels, rearranging the obtained coded data into data blocks and allocating the data blocks to a plurality of recording tracks; and
recording means for recording the coded data from the coding means on the plurality of recording tracks on the recording medium;
the coding means allocating the coded data to tracks so as to make N data blocks arranged continuously in the direction of data arrangement in tracks or in a track arranging direction such that a−1 data blocks continuously arranged in a track are from b continuously arranged channels or where a data blocks continuously arranged in a track are from b−1 tracks and are from different error-correcting code words, where N being the number of the channels (N=a×b, where both a and b are integers not smaller than 2).
8. A data transmission apparatus comprising:
coding means for coding digital data by means of error-correcting codes, dividing the obtained coded data into data blocks of a predetermined length and allocating them to a plurality of channels, wherein each of the error correcting code words includes data from each of the channels; and
transmission means for transmitting the coded data from the coding means by way of the plurality of channels; and further comprising
means for allocating the coded data to N channels wherein N data blocks are arranged such that a−1 data blocks arranged consecutively in a channel are from in b consecutively arranged channels or where a data blocks consecutively arranged in a channel are from b−1 channels are from different error-correcting code words, where N is the number of the channels (N=a×b, where both a and b are integers not smaller than 2).