MUMBAI, India, Sept. 28 -- Intellectual Property India has published a patent application (202647105259 A) filed by Nokia Technologies Oy on September 01, 2026, for Forward Luma Mapping Filter For Mask Information Video Coding.
Inventors include Bugdayci Sansli, Dne; Schwarz, Sebastian; and Hannuksela, Miska Matias.
The application for the patent was published on September 25, 2026, under issue no. 39/2026.
Abstract: In accordance with example embodiments of the invention as shown in FIG. 12 there is at least a method and apparatus to perform receiving luma mapping parameters; receiving a first coded picture with a first indication about luma mapping being enabled for said first coded picture and a second indication that the luma mapping parameters are used for said first coded picture; deriving an inverse and a forward luma mapping function based on the luma mapping parameters received; wherein the luma mapping parameters define a forward luma mapping function using a piecewise linear model; based on object mask information coding being indicated, setting a forward mapping function and an inverse mapping function to a same step function set using the forward luma mapping function at a decoder; decoding or encoding the first coded picture; applying a derived inverse luma mapping function to the first coded picture for a reconstruction of the first coded picture; storing the reconstructed first coded picture in a reference picture buffer; receiving a second coded picture; and decoding the second coded picture using the reconstruction of the first coded picture in the reference picture buffer as a reference for an inter prediction by applying the forward luma mapping function on the generated prediction.
Disclaimer: Curated by HT Syndication.
