CDN technology vendor Edgeware made an uncharacteristic move at the tail end of last week, when the Swedish firm opened up its check book and snapped up subtitling specialist Cavena Image Products for $0.9 million. While plenty of medium-sized OTT technology supplier outfits like Edgeware have been feeling the effects of industry commoditization, leading to job cuts, write downs, and private equity buy outs, Edgeware has sought to diversify its business. But what does a cache server expert want with a subtitling company? Well, apparently Cavena, also from Sweden, drastically improves QoE for OTT video services with its optical character recognition technology (OCR), which converts subtitles from image formats to text formats. As we said, diversity seems to be the…