公开(公告)号：US09699481B2

公开(公告)日：2017-07-04

申请号：US13651181

申请日：2012-10-12

Applicant: Apple Inc.

Inventor： Haitao Guo ,  Sally Fung ,  Timothy J. Millet

IPC: H04N7/12 ,  H04N19/86

CPC classification number: H04N19/86

Abstract: A technique is provided for processing decoded video data to mask visual compression artifacts resulting from video compression. In accordance with this technique, a hardware block is provided for generating and adding random noise to the decoded video stream. In one embodiment, a random number is generated for each pixel of the decoded video data and compared against one or more threshold values to determine a threshold range. In such an embodiment, a noise addend value is selected based upon the threshold comparison and summed with the current pixel. While the present technique may not eliminate the compression artifacts, the addition of random noise renders the compression artifacts less noticeable to the human eye and, therefore, more aesthetically pleasing to a viewer.

公开(公告)号：US20130039432A1

公开(公告)日：2013-02-14

申请号：US13651181

申请日：2012-10-12

Applicant: Apple Inc.

Inventor： Haitao Guo ,  Sally Fung ,  Timothy J. Millet

IPC: H04N7/26

CPC classification number: H04N19/86

Abstract: A technique is provided for processing decoded video data to mask visual compression artifacts resulting from video compression. In accordance with this technique, a hardware block is provided for generating and adding random noise to the decoded video stream. In one embodiment, a random number is generated for each pixel of the decoded video data and compared against one or more threshold values to determine a threshold range. In such an embodiment, a noise addend value is selected based upon the threshold comparison and summed with the current pixel. While the present technique may not eliminate the compression artifacts, the addition of random noise renders the compression artifacts less noticeable to the human eye and, therefore, more aesthetically pleasing to a viewer.