DATA ENCODING AND DECODING

摘要

Data coding apparatus in which a set of ordered data is encoded comprises an entropy encoder for encoding the ordered data, in which each data item is split into respective subsets of data and the respective subsets are encoded by first and second encoding systems so that for a predetermined quantity of encoded data generated in respect of a group of data items by the first encoding system, a variable quantity of zero or more data is generated in respect of that group of data by the second encoding system; and an output data stream assembler for generating an output data stream from the data encoded by the first and second encoding systems, the output data stream comprising successive packets of a predetermined quantity of data generated by the first encoding system followed, in a data stream order, by the zero or more data generated by the second encoding system in respect of the same data items as those encoded by the first encoding system.