SK Telecom has patented a method and apparatus for subband-coding a frequency conversion unit in video encoding/decoding. The technology involves splitting the unit into frequency domains, generating encoding information, scanning frequency coefficients, and binarizing the data for efficient processing. GlobalData’s report on SK Telecom gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on SK Telecom, Cloud gaming was a key innovation area identified from patents. SK Telecom's grant share as of May 2024 was 62%. Grant share is based on the ratio of number of grants to total number of patents.
Video decoding method for frequency coefficients of frequency conversion unit
A recently granted patent (Publication Number: US12010307B2) discloses a video decoding method for decoding frequency coefficients of a two-dimensional frequency conversion unit with various pixel sizes. The method involves reconstructing the frequency coefficients by decoding a bitstream, generating a frequency conversion block, and inversely transforming it from the frequency domain to the spatial domain. The frequency conversion block is created by reconstructing and inversely scanning the frequency coefficients in two-dimensional subblocks, each having a 4x4 pixel size, regardless of the original unit size. The patent also details the encoding of frequency coefficients in the frequency conversion block, with subblock encoding information indicating the presence of non-zero frequency coefficients.
Furthermore, the patent describes a video encoding method for encoding residual signals in a two-dimensional frequency conversion unit, transforming the signals into the frequency domain and encoding frequency coefficients in two-dimensional subblocks. These subblocks, regardless of the size of the frequency conversion block, are 4x4 pixel square blocks. The encoding process involves subblock encoding information to determine the presence of non-zero frequency coefficients, with each subblock containing frequency coefficients corresponding to different frequency ranges. The patent also mentions the parallel reconstruction of subblocks in the encoding process, enhancing efficiency and speed in video encoding applications. Additionally, a non-transitory recording medium storing a bitstream with encoded data of frequency coefficients for decoding processes is also covered in the patent, providing a comprehensive solution for video decoding applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
