Video Encoding In-Loop Filter Parameter Prediction

The patent performs SAO and ALF filter parameter calculations before deblocking filtering, rather than after. This preliminary action allows the parameters to be ready in advance, enabling parallel processing and reducing the critical path delay, thus improving encoding speed while maintaining filtering accuracy through subsequent refinement steps.

The patent divides the filtering process into separate stages: parameter calculation stage, deblocking filtering stage, and in-loop filtering stage. This segmentation allows each stage to be optimized independently and processed in parallel where possible, reducing overall processing time and circuit complexity while maintaining accuracy.

By calculating filter parameters before deblocking filtering, the patent enables earlier initialization of filter structures and reduces the need for large buffers and complex timing control logic that would be required if calculations were performed after deblocking. This reduces overall circuit size and power consumption.

The patent uses prediction mechanisms where filter parameters for current blocks are copied or predicted from previously processed blocks, reducing the need for complete recalculation and thereby reducing circuit complexity and power consumption while maintaining adequate filtering accuracy.

The patent performs filter parameter calculations in advance before deblocking filtering, allowing these computations to overlap with other processing operations. This eliminates sequential waiting time and reduces total processing time while maintaining filtering accuracy through subsequent refinement.

The patent enables continuous processing by allowing parameter calculations to proceed continuously without waiting for deblocking to complete. This continuous action eliminates idle time and keeps processing pipelines full, thereby reducing overall processing time while maintaining accuracy.