Dolby Laboratories. has patented a method for intra prediction mode mapping that enhances image decoding efficiency. The method involves encoding flag information to determine the similarity between candidate and current intra prediction modes, optimizing the encoding process based on their relationship. GlobalData’s report on Dolby Laboratories 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 Dolby Laboratories, Cloud gaming was a key innovation area identified from patents. Dolby Laboratories's grant share as of June 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.
Intra prediction mode mapping for image decoding efficiency
The granted patent US12047564B2 outlines an innovative encoding method for intra-prediction modes used in video compression. The method involves determining and encoding flag information to indicate whether a candidate intra-prediction mode for a current block matches the intra-prediction mode of that block. If they are identical, the method encodes a syntax element related to the candidate modes. Conversely, if they differ, it encodes a syntax element for the remaining intra-prediction mode, which includes information about the current block's intra-prediction mode. The intra-prediction modes are mapped to specific indices based on a predefined table, with distinct mappings for planar, DC, and directional modes. Notably, the encoding process ensures that the codeword length for the candidate modes is shorter than that for the remaining modes, optimizing data efficiency.
Additionally, the patent describes a non-transitory computer-readable storage medium that contains a bitstream encoded using the aforementioned method. This medium retains the same encoding principles, including the determination of flag information and the encoding of syntax elements based on the relationship between candidate and current intra-prediction modes. The mapping of intra-prediction modes to indices remains consistent, with fixed bit coding for the remaining mode information. The encoding method is designed to handle three different candidate intra-prediction modes, enhancing the efficiency and effectiveness of video data compression techniques.
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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.
