Deep Color is a technology employing more than 24-bits/pixel to represent colors on LCD displays.
HDMI 1.3 digital interface standard recently introduced as an optional the Deep Color 48-bits/pixel xvYCC color space which reduces banding over HD resolutions on large screen areas.
Other external references:
As video resolutions increase, up to 3200x2048 pixels with HDMI™ TypeB connector, there is a demand for a high quality of the picture being displayed on LCD HD-TV sets. Deep Color playback devices re-sample the original compressed 24-bits/pixel movie to the 48-bits/pixel format by interpolating and de-blocking the source data.
This requires a notable amount of processing power leading to increased costs, increased power consumption and increased heating while losing details compared to the original 48-bits/pixel uncompressed movie.
Generally, it must be noted how any MPEG-based algorithm is based on "blocks" of pixels - 16x16 to 4x4 pixels - which are not related to any other adjacent block, thus leading to "blocking" artifacts once the video is decoded.
That is why computationally expensive de-blocking filters are basically always applied after decoding, even in very recent standards such as H.264, which contains an in-loop de-blocker.
All the present solutions have been adopted because any movie in any DVD, HD-DVD™ or Blu-Ray Disc™ is still stored in a 24 bits/pixel MPEG format.
Other external references:
CLARITY-48™ allows for compressing and storing the 48-bits/pixel movie using standard MPEG formats, thus allowing for reconstruction rather than re-sampling, without using de-blocking hardware.
This means that by employing CLARITY-48™, DVD, HD-DVD™ or Blu-Ray Disc™ players and recorders can use any MPEG-like algorithm in order to store and playback the movie in a 48 bits/pixel format which is still fully compatible with other non-Deep Color players and devices.
With CLARITY-48™ it is possible to avoid post-filtering - i.e. de-blocking - of the decoded movie since blocking and banding artifacts are automatically removed once CLARITY-48™ is applied to decode the stored 48 bits/pixel movie.
Moreover, the increased storage space offered by Blu-Ray Disc™ and HD-DVD™ makes CLARITY-48™ a perfect solution for providing superior picture quality right from the stored movie.
Specifically, CLARITY-48 TM
allows for:
Up to 48-bits/pixel encoding using JPEG/MPEG standard algorithms.
Backward compatibility with LDR 24-bits/pixel data.
Encoding once for both LDR and DeepColor™ data.
Reconstruction of original data at full precision (subtle details are preserved)
No need for de-blocking with BluRay Disc™ or HD-DVD™.
Can be used with common LDR 24-bits/pixel sources.
Serial or parallel processing.
Extremely "light" algorithm.
Seamless integration with CLARITY-HDR™.
CLARITY-48 TM
is currently in patent pending status.
If you want to learn more about it, please visit the dedicated
Download Page, or contact us and we will provide you with
detailed information and any available software implementation.
DISCLAIMER | Trellis Management Co. Ltd. is not affiliated in any way with those companies, institutions and/or individuals cited herein, if not otherwise specifically stated.
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