Client
A leading media services company specializing in video mastering, disc authoring, and high-fidelity encoding for UHD Blu-ray™, Blu-ray™, and DVD releases. Known for transforming studio master’s into polished final products, they bring a deep command of visual formats, color science, and restoration techniques to every project in the film and broadcast industries, with a focus on visually lossless video output and artifact-free encoding of complex visual elements like grain and texture.
Project
The client partnered with MulticoreWare to enhance the x265 HEVC encoder’s performance in chroma channel compression. The focus was on improving colored film grain representation and reducing artifacts such as chroma blocking and diagonal line distortions, ultimately delivering more accurate, efficient encodes for professional media workflows.
Challenges
Chroma Fidelity
The existing encoder pipeline needed tuning to preserve finer chroma details and mitigate visual artifacts in high-complexity scenes.
Visual Grain Preservation
Required better representation of colored film grain in final encodes without increasing file size significantly.
Artifact Reduction
Minimizing visible chroma blocking and edge distortions common in diagonal motion or gradients.
Code Transparency & Licensing
Ensuring all enhancements adhered to GPLv2 licensing, enabling contributions to the open-source x265 project.
Solution Overview
MulticoreWare delivered targeted enhancements to the x265 encoder, focusing on chroma channel improvements. Key components of the solution included:
- Advanced Chroma Processing Algorithms – Implemented improvements to better encode chroma planes in complex sequences, preserving color texture and reducing blockiness.
- Artifact Detection and Minimization – Developed code to identify and reduce artifacts in diagonal lines and color transitions.
- Test Harness and Reference Clips – Collaborated with the client using sample footage and x265 configurations to validate improvements under real-world encoding scenarios.
- Iterative Milestone Reviews – Provided weekly progress updates and milestone-based reviews with code walkthroughs and support.
- Licensing and Usage – Delivered all work under x265’s GPLv2 framework, enabling integration into upstream releases.
Solution Highlights
Business Impact
This project delivered substantial improvements in the visual quality of x265-encoded content for UHD Blu-ray™ and Blu-ray™ titles. By addressing long-standing chroma challenges, the client now benefits from:
- More accurate color detail reproduction
- Fewer encoding artifacts in complex scenes
- Film-Grain Preservation
- Enhanced compression results without sacrificing visual quality
- A stronger foundation for contributing improvements to the broader opensource x265 community
Conclusion
By improving chroma fidelity and minimizing artifacts, MulticoreWare delivered a measurable upgrade to the x265 encoder fine tuning for better chroma handling and artifact control. The outcome is a more dependable and visually precise encoding pipeline, capable of meeting the high standards required for UHD and Blu-ray™ authoring. This collaboration further reinforces the client’s position as a trusted partner in the premium physical media production space.
To know more, contact our team at info@multicorewareinc.com
