Techniques and tools for encoding enhancement layer video with quantization that varies
spatially and/or between color channels are presented, along with corresponding decoding …

A video encoder includes a region detector module that classifies blocks of video frames. An
adaptive filter module applies a median filter to a block based upon a block classification …

Set QP for macroblock such of at least one of the plural blocks being Zero. For example,
identifying the threshold quantization step size comprises identifying n top AC coefficients in …

720 the current Smooth region. An encoder determines a differen tial quantization interval
for a sequence, the interval compris ing an interval number. The interval constrains the …

Quality settings established by an encoder are adjusted based on information associated
with regions of interest (“ROIs). For example, quantization step sizes can be reduced (to …

US8331438B2 - Adaptive selection of picture-level quantization parameters for predicted
video pictures - Google Patents US8331438B2 - Adaptive selection of picture-level …

(US) 5,301.242 A 4, 1994 Gonzales et al. 5,303,058 A 4, 1994 Fukuda et al.(*) Notice:
Subject to any disclaimer, the term of this 5,317,396 A 5/1994 Fujinami patent is extended or …

US7240210B2 - Hash value computer of content of digital signals - Google Patents
US7240210B2 - Hash value computer of content of digital signals - Google Patents Hash value …

525 but retains the computational advantages of performing the estimation in the transform
domain. Rounding compensation includes, for example, looking up an index (from a de …

Techniques and tools are described for adaptive deadzone (“DZ”) resizing during
quantization. For example, in some embodiments, for quantization of an AC frequency …