Cross-Component Intra Prediction Mode Derivation for Video Coding Efficiency

The decoder derives the target mode for cross-component intra prediction autonomously using neighboring sample data, without requiring explicit signaling from the encoder. This self-service approach eliminates the need for mode indication bits in the bitstream, thereby improving coding efficiency while maintaining decoding accuracy through consistent derivation at both encoder and decoder sides

The target mode is pre-derived at the encoder side using neighboring reconstructed or predicted samples, and the same derivation process is performed at the decoder side. This preliminary action ensures that both encoder and decoder arrive at the same mode selection without requiring communication of the mode information, thus reducing bitrate while preserving decoding accuracy

Both encoder and decoder independently derive the target mode using the same algorithm based on neighboring samples, eliminating the need to signal mode information. This self-service mechanism maintains mode selection flexibility through adaptive derivation while avoiding bitrate increase by removing explicit mode signaling

The target mode is determined dynamically by changing parameters such as gradient calculations and neighboring sample values, allowing flexible mode selection adapted to local image characteristics. This parameter-based derivation provides adaptability without requiring additional bits for mode signaling, as the mode is inferred from image content parameters