Explanation Series on Recent Resolution Independence Announcement – Finale: The Science Behind the Term
In the finale to our Explanation Series on our recent Resolution Independence Announcement, we will briefly explain the science behind “Resolution Independence” and how TRUDEF™’s video compression technology accommodates its features.
Video codec refers to compression and decompression of digital video. There are many ways for raw frames or footage to be converted to a format that is compressed. The resolution on the other hand is what we see. The resolution is the number of pixels along the edge of a digital frame – this is what you see when images are displayed on the screen. For example we see a 2k frame at 2048 by 1080 pixels, as specified by Digital Cinema Systems.
Now let’s dig deeper and see what can happen when we upscale a video. Say we upscale a 2k frame to 4k. We now have an image that is approximately 4000 pixels wide. But what is really happening when we double the size?
With the TRUDEF™ algorithm, during compression each group of pixels is analyzed and the digital data is converted into a set of very sophisticated math equations. Since these equations are smaller than the current video compression algorithms, TRUDEF™ compression ratios are higher and the amount of information discarded is extremely small. This really means color and detail are retained even when upscaling because fractal scaling is based on information gathered during the compression process.
Why is Retaining Information during compression important?
With the retention of information, upscaling a fractal frame is more accurate. All other compression systems upscaling is based on heavily contaminated pixels. During DCT compression, detail and color are thrown out making the image less than what it was in “Raw” format making the compressed images contaminated.
Let us explain a little further:
During the compression process each frame is divided into pixel macro blocks. TRUDEF™ presently handles 2X2, 4X4, 8X8, up to 16X16 blocks of pixels.
- The blocking size determines the amount of compressed information collected on the group of pixels.
- When selecting a large block size, the resulting compressed video will have a higher compression ratio but less detail and more artifacts.
- In DCT compression, the compression artifacts tend to remain on several generations of decompressed frames, and move with the optic flow of the image, leading to a peculiar effect, part way between a painting effect and “grime” that moves with objects in the scene.
In Summary: TRUDEF™ fractal code captures and encodes the camera sensor information in a resolution independent mathematical set of equations. The fractal player builds each pixel in a video frame to the resolution that the player requests.
Visualizing Resolution Independence
Resolution independence can be visualized by the fonts on a computer monitor for they are described by a formula and the font size can be selected and built: You a hit key to tell the computer you want the font size to be 8, 12, 16 or 32 depending on the usage for the font. Much easier than in the days before digital type (analog and by hand).
Analog Lead Type
TRUDEF™ compressed video in small block sizes can be used in:
- Digital frame storage
- Post video production
TRUDEF™ compressed video in large block sizes can be used in:
- TV signals
- Mobile Devices
Theoretically, a fractal encoded image could be scaled to an infinite size but practically as the scaling increases; the pixelation increases. The practical limit to upscaling for each video shot is directly related to the quality of the camera lens and its sensor.
This will conclude our Resolution Independence Explanation Series. To find out more about our TRUDEF™ video compression technology, visit http://www.tmmi.us/technology .
TRUDEF™ BLOG – http://trudefblog.us
TMMI is a technology company headquartered in the US, specializing in video image management and compression. Founded in 1990, the company is dedicated to improving bandwidth utilization and video image quality. TMMI develops digital video compression technology that provides end-to-end workflow and distribution solutions for cinema, sports, mobile, streaming media, cable, medical imaging, security, defense, space exploration and education. TRUDEF™ fractal technology offers users enhanced image quality, reduced bandwidth utilization and digital media storage requirements.