Alibaba Group has been granted a patent for methods and systems to process chroma signals in video sequences. The technology involves determining chroma residual scaling based on flags in sequence and picture parameter sets. The patent covers a computer-implemented decoding method for handling chroma de-blocking parameters. GlobalData’s report on Alibaba Group 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 Alibaba Group, Blockchain-based property authentication was a key innovation area identified from patents. Alibaba Group's grant share as of January 2024 was 42%. Grant share is based on the ratio of number of grants to total number of patents.
Decoding method for processing chroma signals in video sequences
The granted patent (Publication Number: US11889091B2) discloses a computer-implemented method for decoding and encoding video sequences by determining the value of a pps_chroma_tool_offsets_present_flag in a picture parameter set (PPS). When the value is 1, the method involves decoding or signaling one or more picture level chroma de-blocking parameters in the bitstream associated with the video sequence. These parameters include beta offset or tc offset, and are crucial for enhancing video quality by adjusting chroma levels.
Furthermore, the patent also covers a non-transitory computer-readable medium storing a bitstream with the PPS containing the pps_chroma_tool_offsets_present_flag. When the value is 1, the bitstream includes the chroma de-blocking parameters, while it excludes them when the value is 0. The parameters, such as ph_cb_beta_offset_div2 and ph_cr_tc_offset_div2, play a significant role in adjusting chroma levels for optimal video quality. Additionally, the patent discloses an encoding method that mirrors the decoding process, where the value of the pps_chroma_tool_offsets_present_flag determines the signaling of chroma de-blocking parameters in the bitstream associated with the video sequence, further enhancing the video encoding process.
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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.
