ADAPTIVE FILTER FOR VIDEO SIGNAL PROCESSING FOR DECODER THAT SELECTS RATE OF SWITCHING BETWEEN 2D AND 3D FILTERS FOR SEPARATION OF CHROMA AND LUMA SIGNALS

摘要

An adaptive temporal motion filter for a video decoder system operates in an infinite impulse response (IIR), a max or a bypass mode. The adaptive temporal motion filter includes an adaptive time constant control module and a filter gain module. A gain factor of the filter gain module is varied by the adaptive time constant control module for every pixel in a current composite video signal. The adaptive time constant control module selects a variable gain for the filter gain module based on the motion magnitude, motion polarity and chroma luma status of the pixel.

主权项

1. A video decoder system comprising:
a motion detector to determine presence of motion in a current composite video signal by comparing the current composite video signal with a corresponding delayed composite video signal; a chroma-luma (Y/C) separation module to decode a pixel based on the presence of motion, using at least a filter selected from a 2D filter and a 3D filter; and an adaptive temporal motion filter to adaptively select a rate of switching between the 2D filter and the 3D filter, based at least in part on a motion magnitude, a motion polarity, and a chroma-luma status of the pixel.