; we must not need to seek to build a 100%
  complete bitstream.</li>
<li>Use no more than approximately 1-2% of bitstream bandwidth for
  packet boundary marking, high-level framing, sync and seeking.</li>
<li>Specification of absolute position within the original sample
  stream.</li>
<li>Simple mechanism to ease limited editing, such as a simplified
  concatenation mechanism.</li>
<li>Detection of corruption, recapture after error and direct, random
  access to data at arbitrary positions in the bitstrea