What is Dolby Vision? Well, HDR10 uses a single peak brightness for an entire film, which can cause problems with overall brightness on less capable HDR TVs. The big new feature on the X700 is support for Dolby Vision, unfortunately Sony's update hadn't been released at the time of the review, so I was unable to actually test it. It can also convert HDR content into standard dynamic range (SDR), thanks to Sony's proprietary algorithms that map the brightness and colour space to older 4K TVs that don’t support the HDR10 format. Since it's also an Ultra HD Blu-ray player, the X700 supports 4K, HDR10 and a wide colour gamut in the form of the Rec.2020 colour space.
The player's capabilities also extend to excellent upscaling, allowing the Sony to make the most of lower resolution disc formats, whether that's Blu-ray or DVD. In terms of other disc formats the X700 is fairly comprehensive, with support for 4K Ultra HD Blu-ray, along with CD, DVD, Blu-ray and 3D Blu-ray. While the loss of Hi-Res Audio is a shame, the lack of DVD-Audio isn't really a big deal and the player still supports the more popular SACD disc format. In order to reach a lower price point Sony has dropped some features from the X700, so there's no support for Hi-Res Audio and DSEE-HX upscaling and no DVD-Audio disc playback either.
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