| 摘要 |
<p>The invention relates to a method of variable length coding in which a set of data symbols comprising a certain first number of data symbols having a first value and a certain second number of data symbols having values other than said first value, in which a set of symbols to be variable-length encoded is formed from said set of data symbols, and variable-length encoding is applied to the set of symbols to be variable-length encoded. According to the method, at least one characteristic of the variable length encoding applied to the set of symbols to be variable-length encoded is adapted according to the number of the symbols to be variable-length encoded and an indication of the number of variable-length encoded symbols is provided. According to the invention, the indication is a variable length codeword representative of the number of symbols to be variable length encoded selected from one of at least two alternative sets of variable length codewords according to the number of symbols to be variable length encoded. The invention also relates to a corresponding method of variable length decoding, as well as an encoder and decoder which implement the variable length coding and decoding methods according to the invention.</p> |
