JVCKENWOOD has filed a patent for a picture coding device that codes moving pictures using inter prediction. The device includes units for deriving motion vector predictor candidates and merging candidates based on inter prediction information. The device aims to improve the coding efficiency of moving pictures. GlobalData’s report on JVCKENWOOD 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 JVCKENWOOD, adaptive video coding was a key innovation area identified from patents. JVCKENWOOD's grant share as of September 2023 was 52%. Grant share is based on the ratio of number of grants to total number of patents.

Picture coding device using inter prediction for moving pictures

Source: United States Patent and Trademark Office (USPTO). Credit: JVCKENWOOD Corp

A recently filed patent (Publication Number: US20230319264A1) describes a picture coding device and method for coding a moving picture using inter prediction. The device includes various units and steps for deriving motion vector predictor candidates and merging candidates based on inter prediction information. The history-based motion vector predictor candidate derivation unit and the history-based merging candidate derivation unit refer to the inter prediction information included in the history-based motion vector predictor candidate list in reverse orders each other.

The picture coding method involves adding inter prediction information to a history-based motion vector predictor candidate list and deriving spatial motion vector predictor candidates from neighboring blocks. History-based motion vector predictor candidates are derived from the history-based motion vector predictor candidate list and added to the motion vector predictor candidate list. Spatial merging candidates are derived from neighboring blocks and added to a merging candidate list. History-based merging candidates are derived from the history-based motion vector predictor candidate list and added to the merging candidate list. An average merging candidate is derived by averaging motion vectors of two merging candidates in the merging candidate list and added to the merging candidate list. The history-based motion vector predictor candidate derivation step and the history-based merging candidate derivation step refer to the inter prediction information included in the history-based motion vector predictor candidate list in reverse orders each other.

The patent also includes a storing method for storing a bitstream formed by the picture coding method in a recording medium. Additionally, there is a transform method for transforming a bitstream formed by the picture coding method. A non-transitory computer-readable medium is provided with a picture coding program that executes the steps described in the picture coding method.

Furthermore, the patent describes a picture decoding device for decoding bit strings in which a moving picture is coded using inter prediction. The device includes units for adding inter prediction information to a history-based motion vector predictor candidate list, deriving spatial motion vector predictor candidates, deriving history-based motion vector predictor candidates, deriving spatial merging candidates, deriving history-based merging candidates, and deriving an average merging candidate. The history-based motion vector predictor candidate derivation unit and the history-based merging candidate derivation unit refer to the inter prediction information included in the history-based motion vector predictor candidate list in reverse orders each other.

Similarly, a picture decoding method is provided for decoding bit strings in which a moving picture is coded using inter prediction. The method includes steps for adding inter prediction information to a history-based motion vector predictor candidate list, deriving spatial motion vector predictor candidates, deriving history-based motion vector predictor candidates, deriving spatial merging candidates, deriving history-based merging candidates, and deriving an average merging candidate. The history-based motion vector predictor candidate derivation step and the history-based merging candidate derivation step refer to the inter prediction information included in the history-based motion vector predictor candidate list in reverse orders each other.

In conclusion, the patent presents a comprehensive system and method for coding and decoding moving pictures using inter prediction. The inclusion of history-based motion vector predictor candidates and merging candidates enhances the accuracy and efficiency of the coding and decoding process.

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