DECODING ISSUES
Challenges in Decoding
- Search space size --- exhaustive search is
impractical
- Efficiency --- requirements on computation time
and memory
- Accuracy --- generate the correct hypotheses
- Scalability --- increase in computation is
proportional to the gain of using complex models
- Flexibility --- ability to perform under different
constraints
Approaches
- Search space reduction
- - Efficient hypotheses generation
- - Merging common hypotheses
- Pruning unlikely hypotheses
- Applying external knowledge
Sub-optimal choices