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I have only used Vudu a couple of times in the past. What I would be interested in is a paper or someone able to tell me about their HDX format? I was impressed
by X86BSD 9y ago
I have only used Vudu a couple of times in the past. What I would be interested in is a paper or someone able to tell me about their HDX format? I was impressed with the visual quality of that when it first came out. Does anyone have any details on that format?
- niftich 9y agoA 2008 TechCrunch article has an uncited blockquote about it [1]. From that verbiage, it appears it's H.264 produced with a good encoder, likely some custom quantizer matrices (vs. the default flat matrices, to allocate less detail to dark scenes and more to brighter scenes), less aggressive deblocking (to reduce smudging and impart 'fake sharpness'), ABR-like capped VBR -- similar to bit-reservoir MP3; multi-pass encoding, some tunings for film grain preservation (or emulation?), and maybe a sharpen filter. If you've ever used x264, all of the above techniques are common advice to encode film material, except for the use of multi-pass encoding, which is being used by Vudu to make the file more CBR-like in the beginning, and gradually attain VBR. [1] https://techcrunch.com/2008/10/02/vudu-officially-announces-full-hd-service-hdx/ https://techcrunch.com/2008/10/02/vudu-officially-announces-...
- X86BSD 9y agoThank you very much! That is very interesting.