Patent ID: 9571856
Date: 2017-02-14
CPC Classifications: H04N

Claim:
1. A method of using a scalable video processing tool with bit depth scalability, the method comprising: receiving base layer video after reconstruction of the base layer video, wherein the reconstructed base layer video has plural sample values with a first sample depth having a first number of bits per sample value; adjusting an adaptive lowpass filter based upon one or more filter strength parameters that are signaled as side information in an enhancement layer bit stream; and filtering the reconstructed base layer video using the adaptive lowpass filter in combination with upsampling the plural sample values of the reconstructed base layer video to a second sample depth having a second number of bits per sample value, the second number of bits per sample value being higher than the first number of bits per sample value associated with the first sample depth, wherein the filtering includes changing normalization factor of the adaptive lowpass filter at a location depending on how many neighbor sample values around the location are within a threshold of similarity to a current sample value at the location.