Linear light scaling service for non-linear light pixel values
US11218743B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2020 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Jun 30, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/2662
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques for a fast approximation of linear light scaling for inputs of non-linear light values are described. As one example, a computer-implemented method includes receiving a request to downscale a plurality of pixels of a single frame of a video file performing, in response to the request to downscale, a lookup in a lookup table for a first input of a first non-linear light value of luminance for a first pixel of the plurality of pixels and a second input of a second non-linear light value of luminance for a second pixel of the plurality of pixels to generate an output of a third single non-linear light value of luminance for a linear light scaling for the first pixel and the second pixel, generating a scaled frame based at least in part on the third single non-linear light value of luminance for the linear light scaling, receiving a request for a manifest for the video file from a client device, generating the manifest for the client device that identifies a scaled video representation that comprises the scaled frame, and sending the manifest to the client device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.