# US 10,873,758 B2 · Image processing device and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,758 B2 - Document ID: US10873758B2 - Status: Granted - Kind: B2 - Application number: 16/289,202 - Filed: 2019-02-28 - Published: 2019-06-27 - Granted: 2020-12-22 - Earliest claimed: 2012-10-09 - Assignees: Sony Corporation - Applicants: Sony Corporation - Inventors: Yoshitomo Takahashi; Ohji Nakagami - Web page: https://patentgrep.com/patent/US10873758B2 ## CPC - H04N 19/52: by predictive encoding - H04N 19/177: the unit being a group of pictures [GOP] - H04N 19/597: specially adapted for multi-view video sequence encoding - H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) - H04N 19/577: Motion compensation with bidirectional frame interpolation, i.e. using B-pictures - H04N 19/58: Motion compensation with long-term prediction, i.e. the reference frame for a current frame not being the temporally closest one (H04N19/23 takes precedence) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract The present disclosure relates to an image processing device and an image processing method capable of reducing a processing amount. A selection unit selects a plurality of reference pictures having mutually-different reference picture types from reference pictures represented by reference picture specifying information included in a reference list based on restriction identification information identifying that the reference list that is a list of reference picture specifying information specifying reference pictures of a current picture is used commonly within the current picture. A predicted image generating unit generates a predicted image of the current picture based on a motion vector of a collocated picture of time different from that of the current picture and a reference picture of a same reference picture type as a reference picture type of the collocated picture among the plurality of reference pictures selected by the selection unit. ## Claims ### Claim 1 An image processing device comprising: a selection unit that: searches for a minimum value of an index of a reference picture type different from the reference picture type of a current picture in units of pictures; and selects a plurality of reference pictures having mutually-different reference picture types from reference pictures represented by reference picture specifying information included in a reference list, wherein the reference list is a list of reference picture specifying information specifying reference pictures of the current picture, and wherein said selecting the plurality of reference pictures is performed only if the reference list is used commonly by all slices within the current picture; and a predicted image generating unit that generates a predicted image of the current picture based on a motion vector of a collocated picture of time different from that of the current picture and a reference picture of a same reference picture type as a reference picture type of the collocated picture among the plurality of reference pictures selected by the selection unit. ### Claim 2 (depends on 1) The image processing device according to claim 1, wherein, in a case where the reference list is used commonly by all slices within the current picture, the selection unit selects the reference picture of the same reference picture type as the reference picture type of the current picture and the reference picture of a reference picture type different from the reference picture type of the current picture. ### Claim 3 (depends on 2) The image processing device according to claim 2, wherein the selection unit selects the reference picture of the same reference picture type as the reference picture type of the current picture that is represented by the reference picture specifying information of which an index of the reference list is “0” and the reference picture of the reference picture type different from the reference picture type of the current picture that is represented by the reference picture specifying information of which an index of the reference list is other than “0”. ### Claim 4 (depends on 3) The image processing device according to claim 3, wherein the selection unit selects the reference picture of which the index is minimal among the reference pictures of the reference picture type different from the reference picture type of the current picture that is represented by the reference picture specifying information of which the index of the reference list is other than “0”. ### Claim 5 (depends on 1) The image processing device according to claim 1, wherein the reference picture type is a Long-term or a Short-term. ### Claim 6 (depends on 1) The image processing device according to claim 1, wherein restricted_ref_pic_lists_flag is used for identifying whether the reference list is used commonly by all slices within the current picture. ### Claim 7 An image processing method using an image processing device, the image processing method comprising: a selecting step of: searching for a minimum value of an index of a reference picture type different from the reference picture type of a current picture in units of pictures; and selecting a plurality of reference pictures having mutually-different reference picture types from reference pictures represented by reference picture specifying information included in a reference list, wherein the reference list is a list of reference picture specifying information specifying reference pictures of the current picture, and wherein said selecting the plurality of reference pictures is performed only if the reference list is used commonly by all slices within the current picture; and a predicted image generating step of generating a predicted image of the current picture based on a motion vector of a collocated picture of time different from that of the current picture and a reference picture of a same reference picture type as a reference picture type of the collocated picture among the plurality of reference pictures selected in the process of the selecting step.