# US 12,003,775 B2 · Video decoding apparatus and video coding apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,775 B2 - Document ID: US12003775B2 - Status: Granted - Kind: B2 - Application number: 17/264,869 - Filed: 2019-08-06 - Published: 2021-07-22 - Granted: 2024-06-04 - Earliest claimed: 2018-08-06 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: Eiichi Sasaki; Yukinobu Yasugi; Takeshi Chujoh; Tomoko Aono; Tomohiro Ikai - Web page: https://patentgrep.com/patent/US12003775B2 ## CPC - H04N 19/70: characterised by syntax aspects related to video coding, e.g. related to compression standards - H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction - H04N 19/117: Filters, e.g. for pre-processing or post-processing (sub-band filter banks H04N19/635) - H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction - H04N 19/167: Position within a video image, e.g. region of interest [ROI] - H04N 19/174: the region being a slice, e.g. a line of blocks or a group of blocks - H04N 19/176: the region being a block, e.g. a macroblock - H04N 19/186: the unit being a colour or a chrominance component - H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) - H04N 19/82: involving filtering within a prediction loop - H04N 19/86: involving reduction of coding artifacts, e.g. of blockiness - H04N 19/55: Motion estimation with spatial constraints, e.g. at image or region borders - H04N 19/865: {with detection of the former encoding block subdivision in decompressed video} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract In a scheme in which only a part of one picture is intra-predicted and the rest of the region is inter-predicted, generation of a significant code amount and generation of a delay can be avoided in a specific picture. However, because only a part of the picture is coded by means of the intra prediction, coding efficiency is deteriorated as compared to an I picture in which the entire picture is coded by means of the intra prediction. A picture is split into a restricted region and a non-restricted region. Prediction is performed by using an intra prediction in which only a pixel of the restricted region is referred to or an inter prediction in which a restricted reference region of a reference picture is referred to for a block of the restricted region. Prediction is performed by using the intra prediction in which a decoded pixel in the picture is referred to or the inter prediction in which the reference picture is referred to for the block of the non-restricted region. After decoding of the picture, the restricted region is configured as the restricted reference region. ## Claims ### Claim 1 An image decoding apparatus for decoding a picture, the image decoding apparatus comprising: a parameter decoder that: decodes a flag in a sequence parameter set, wherein the flag specifies whether a position syntax element is signaled, wherein the flag is represented by an unsigned integer using 1 bit, and wherein a value of the flag is equal to one in a case that a sequential refresh is used, and the value of the flag is equal to zero in a case that the sequential refresh is not used, decodes the position syntax element specifying a location for a region boundary in a unit of a specified region, in a case that the value of the flag is equal to one, and derives a location of the region boundary using the position syntax element; and a deblocking filter that adaptively performs a filtering process to a block boundary, wherein the deblocking filter is not applied to the block boundary between two blocks, in a case that (i) the value of the flag is equal to one and (ii) the block boundary coincides with the region boundary. ### Claim 2 (depends on 1) The image decoding apparatus of claim 1, wherein the location of the region boundary is derived in each picture, and the region boundary includes a coding unit boundary, a prediction unit boundary, or a transform unit boundary. ### Claim 3 An image encoding apparatus for encoding image data, the image encoding apparatus comprising: a parameter encoder that: encodes a flag in a sequence parameter set, wherein the flag specifies whether a position syntax element is signaled, wherein the flag is represented by an unsigned integer using 1 bit, and wherein a value of the flag is equal to one in a case that a sequential refresh is used, and the value of the flag is equal to zero in a case that the sequential refresh is not used, encodes the position syntax element specifying a location for a region boundary in a unit of a specified region, in a case that the value of the flag is equal to one, and derives a location of the region boundary using the position syntax element; and a deblocking filter that adaptively performs a filtering process to a block boundary, wherein the deblocking filter is not applied to the block boundary between two blocks, in a case that (i) the value of the flag is equal to one and (ii) the block boundary coincides with the region boundary. ### Claim 4 A method for decoding a picture, the method including: decoding a flag in a sequence parameter set, wherein the flag specifies whether a position syntax element is signaled, wherein the flag is represented by an unsigned integer using 1 bit, and wherein a value of the flag is equal to one in a case that a sequential refresh is used, and the value of the flag is equal to zero in a case that the sequential refresh is not used; decoding the position syntax element specifying a location for a region boundary in a unit of a specified region, in a case that the value of the flag is equal to one; deriving a location of the region boundary using the position syntax element; and adaptively performing a deblocking filtering process to a block boundary, wherein the deblocking filter process is not applied to the block boundary between two blocks, in a case that (i) the value of the flag is equal to one and (ii) the block boundary coincides with the region boundary. ### Claim 5 (depends on 1) The image decoding apparatus of claim 1, wherein the deblocking filter is applied to the block boundary, in a case that the value of the flag is equal to zero.