Panasonic and Sony on Friday were revealed to have made a technology that could provide a third more space on a Blu-ray disc than existing technology. An evaluation technique known as i-MLSE (Maximum Likelihood Sequence Estimation) would better judge the optical quality when reading and writing discs, letting Blu-ray burners and readers work at up to a higher limit. The companies estimate that they could already produce 33.4GB per layer versus 25GB today and could result in a 66.8GB dual-layer disc.