Palette Table Prediction for Video Coding Efficiency

The patent extends the functionality of color tables to serve dual purposes: they are used both for blocks coded in palette mode and for blocks coded in non-palette mode. By allowing color tables to be derived from and reused across different coding modes, the system achieves universal applicability, improving coding efficiency without significantly increasing complexity

The patent performs preliminary derivation and storage of color tables from previously processed blocks before they are needed for prediction. By preparing color tables in advance from non-palette coded blocks and storing them in a buffer, the system ensures that color tables are ready for reuse when palette coding is applied to subsequent blocks, eliminating the need for complex real-time generation

The patent implements a buffer-based system that manages color tables by retaining useful color information from previous blocks while discarding redundant data. The buffer stores color tables from non-palette coded blocks for potential reuse, and automatically manages the lifecycle of color tables, keeping only those that are likely to be useful for prediction, thus balancing accuracy with storage efficiency

The same buffer structure serves multiple functions: it stores color tables for prediction, manages memory allocation, and handles the transition between different coding modes. This multi-functional approach reduces the need for separate storage mechanisms for different types of color table management