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Diffstat (limited to 'notes/data-rep.tex')
| -rw-r--r-- | notes/data-rep.tex | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/notes/data-rep.tex b/notes/data-rep.tex index f2f5ef4..7e93d0b 100644 --- a/notes/data-rep.tex +++ b/notes/data-rep.tex @@ -2,9 +2,9 @@ \section{Metadata} -Metadata means data about data. It is the information stored in a file -that is not part of the main information, but instead important -properties and data of the file, such as the author name of a PDF +Metadata is data about data: it is information stored in a file +that is not part of the main data, but instead +properties important to file, such as the author name of a PDF document. Although we do not take it into account when calculating file size, it is important to realise that in the real world, it would be there. @@ -188,8 +188,11 @@ the sting would be $7\times 10 = 70\ bits$ (as there are 10 characters). Using the Huffman tree we have generated we can encode $repetitive$ as -\begin{align*} - 0100000101001110111001100 -\end{align*} + + +\noindent\hspace*{0.3\textwidth}\texttt{0100000101001110111001100}\\ + \hspace*{0.3\textwidth}\texttt{r\ \ \ e\ p\ \ \ e\ t\ i\ t\ i\ v\ \ e\ } + + This uses $25\ bits$, which is a $(70-25)\div(70)\times 100 \approx 64.3\%$ saving. |