Canon. has been granted a patent for a method of decoding coding units from video bitstreams. The method involves determining scan patterns for transform blocks, decoding residual coefficients, and managing transform selection indices for luma and chroma components, enhancing video compression efficiency. GlobalData’s report on Canon 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 Canon, E-transaction user interfaces was a key innovation area identified from patents. Canon's grant share as of July 2024 was 47%. Grant share is based on the ratio of number of grants to total number of patents.
Method for decoding video bitstream coding units
The granted patent US12075058B2 outlines methods and apparatuses for encoding and decoding coding units from a bitstream, specifically focusing on image processing using a tree structure. The methods involve decoding and encoding flags that indicate whether transform processes for luma and chroma components are skipped. The luma component is associated with a luma transform skip flag, while the chroma components (Cb and Cr) have their respective chroma transform skip flags. The patent details conditions under which an index for a specific transform process is not decoded or encoded from the bitstream, particularly when the coding unit is divided using single or dual tree structures and when certain transform processes are skipped.
Additionally, the patent specifies that the index is not encoded or decoded even if a transform block contains non-zero coefficients at positions other than the DC position, under specific conditions. The methods also allow for the use of ternary splits to divide coding units. The apparatuses described include processors and memory configured to perform these encoding and decoding tasks, ensuring efficient handling of image data. The patent further encompasses non-transitory computer-readable storage mediums containing instructions for executing the described methods, emphasizing the technological advancements in image coding and decoding processes.
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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.
