Video Encoding Quantization Parameter Adaptation

The patent applies local quality by determining separate quantization parameters for different quantization bins based on the frequency distribution of color component values. Instead of using a uniform quantization parameter for all values, the encoder assigns different QP values to different bins, allowing regions with high frequency values to use finer quantization (lower QP) and regions with low frequency values to use coarser quantization (higher QP), thereby optimizing video quality where it matters most while maintaining encoding efficiency.

The patent changes the quantization parameter based on the frequency distribution characteristics of color component values. The QP is dynamically adjusted according to the determined frequency distribution, transforming from a static uniform QP approach to a dynamic adaptive QP approach that matches the actual data characteristics, thus improving coding efficiency and video quality.

The patent changes the quantization step size dynamically based on the frequency distribution of color component values. For color components with high frequency values, a smaller quantization step size is used to maintain precision, while for low frequency values, a larger step size is used to reduce bit consumption. This adaptive parameter adjustment ensures that the available code words are utilized efficiently without wasting bits on rarely used color values.

The patent applies partial action by allocating quantization precision selectively only where needed. Instead of uniformly applying fine quantization across all color component values (which would waste bits), the encoder applies fine quantization only to the specific bins that contain actual data, while using coarser quantization for bins that would otherwise remain unused, thus eliminating bit waste while maintaining necessary color representation range.