You might be thinking of one of these real papers:
Psycho-visual rate-distortion (psy-rd) settings determine how much the encoder prioritizes visual quality over mathematical efficiency. : The default in many tuning scenarios.
However, there is titled "Undertone x264" in standard video coding literature (ACM, IEEE, SPIE, etc.). undertone x264
x264 is an open-source library used to encode video into the H.264/MPEG-4 AVC format, as detailed by Wikipedia .
x264 provides hundreds of parameters for precise tuning that hardware encoders simply do not offer. Conclusion: The Art of Encoding You might be thinking of one of these
For high-definition, high-bitrate encoding where you want to keep sharp edges, lowering the deblocking strength (e.g., -deblock -1:-1 ) can preserve fine details, while increasing it can soften an image. 3. Psycho-visual RD and Trellis
(2026), the tag signifies a video file encoded with this specific library. x264 is an open-source library used to encode
In the world of digital encoding, the ultimate goal is transparency—compressing a file until it's small, but stopping right before the eye notices a difference. That is the philosophy behind the Undertone x264 standard.