Invention Grant
- Patent Title: System and method for masking visual compression artifacts in decoded video streams
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Application No.: US13651181Application Date: 2012-10-12
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Publication No.: US09699481B2Publication Date: 2017-07-04
- Inventor: Haitao Guo , Sally Fung , Timothy J. Millet
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: APPLE INC.
- Current Assignee: APPLE INC.
- Current Assignee Address: US CA Cupertino
- Agency: Baker Hostetler LLP
- Agent Robert L. Hails
- Main IPC: H04N7/12
- IPC: H04N7/12 ; 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.
Public/Granted literature
- US20130039432A1 SYSTEM AND METHOD FOR MASKING VISUAL COMPRESSION ARTIFACTS IN DECODED VIDEO STREAMS Public/Granted day:2013-02-14
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