abstract.tex

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   2 This document is the specification of the Dirac video decoder and stream syntax.
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   4 Dirac is a royalty-free video compression system developed by the BBC
   5 utilising wavelet transforms and motion
   6 compensation. It is designed to be simple, flexible, yet highly effective.
   7 It can operate across a wide range of resolutions and
   8 application domains, including: internet and mobile streaming, delivery of
   9 standard-definition and high-definition
  10 television, digital television and cinema production and distribution,
  11 and low-power devices and embedded applications.
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  13 The system offers several key features:
  14 \begin{itemize}
  15 \item lossy and lossless coding using a common tool set
  16 \item intra-coded modes for professional production applications
  17 \item a special low delay mode for link adaption applications, such as the carriage of HDTV
  18 over SDTV infrastructure
  19  \item motion-compensated (`long-GOP') modes for distribution applications
  20 \item gradual quality reduction with increasing compression
  21 \end{itemize}
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