The adult movie industry seems set to standardise on the HD-DVD format, and it appears that Sony has banned pornographers from using its Blu-ray discs.

Reports from the adult industry exhibition in Las Vegas suggest that all the major adult movie studios are standardising on HD-DVD, citing the lower costs of production as the primary driver.

But there are reports that Sony may be encouraging this by banning Blu-ray disc manufacturers from accepting adult content at all.

'Joone', the founder of Digital Playground, one of the biggest adult studios, told German magazine Heisse that he was originally planning to switch from DVD to Blu-Ray because the capacity of the discs was larger. 

But Joone found that no manufacturer would take his content, citing fears that Sony would cancel production licences with any facility printing pornography.

If true, this seems a bizarre decision by Sony. The adult industry's adoption of the VHS standard is seen is one of the key reasons why Sony's Betamax format lost in the video player market.

So far no adult movie studio is currently stocking Blu-ray titles, while major names like Bangbros and Pink Visual have come out for HD-DVD.