Chroma Quantization Parameter Control for HDR Video Coding

The patent replaces expensive logarithmic and exponential mathematical operations with cheaper approximation algorithms that consume less processing power. The approximation methods provide sufficient precision for video coding applications without the high computational cost of exact mathematical functions, effectively substituting expensive operations with more efficient alternatives.

The patent transforms the dynamic range adjustment process by changing the mathematical parameters and operations used. Instead of using standard logarithmic and exponential functions, the patent employs alternative computational approaches with different parameter representations that reduce processing power requirements while maintaining acceptable precision for video coding.

The patent enforces harmonized processing techniques for both luma and chroma dynamic range adjustment in encoding and decoding. By requiring that the same approximation methods and processing steps be used by both encoders and decoders, the patent ensures bit matching consistency while maintaining the flexibility needed for HDR and WCG video coding applications.

The patent creates a universal processing framework that handles both luma and chroma components using the same dynamic range adjustment techniques. This multi-functional approach ensures that encoders and decoders process video data consistently across different color components, improving compression efficiency and bit matching while preserving the adaptability required for various HDR and WCG scenarios.