# US 12,113,970 B2 · Deblocking in a video encoder and/or video decoder > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,970 B2 - Document ID: US12113970B2 - Status: Granted - Kind: B2 - Application number: 17/577,956 - Filed: 2022-01-18 - Published: 2022-05-05 - Granted: 2024-10-08 - Earliest claimed: 2018-11-15 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Kenneth Andersson; Jack Enhorn; Ruoyang Yu; Zhi Zhang - Web page: https://patentgrep.com/patent/US12113970B2 ## CPC - H04N 19/117: Filters, e.g. for pre-processing or post-processing (sub-band filter banks H04N19/635) - H04N 19/86: involving reduction of coding artifacts, e.g. of blockiness - 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 19/132: Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking - H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction - H04N 19/176: the region being a block, e.g. a macroblock - H04N 19/82: involving filtering within a prediction loop - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A deblocking method for deblocking a boundary between a first block of samples, block P, and a second block of samples, block Q. The method includes determining whether at least one of the P block or the Q block is a combined intra-inter prediction block; and, as a result of determining that at least one of the P block or the Q block is a combined intra-inter prediction block, deblocking the boundary between the P block and the Q block. ## Claims ### Claim 1 A method for deblocking a boundary between a first block of samples (P block), and a second block of samples (Q block), the method comprising: determining whether at least one of the P block or the Q block is a weighted combination of an intra prediction block and an inter prediction block; and as a result of determining that at least one of the P block or the Q block is a weighted combination of an intra prediction block and an inter prediction block, deblocking the boundary between the P block and the Q block. ### Claim 2 (depends on 1) The method of claim 1, wherein deblocking the boundary between the P block and the Q block comprises reducing a discontinuity between the P block and the Q block. ### Claim 3 (depends on 2) The method of claim 2, wherein reducing the discontinuity between the P block and the Q block comprises filtering the P block using a deblocking filter and filtering the Q block using the deblocking filter. ### Claim 4 (depends on 1) The method of claim 1, further comprising setting a boundary strength (BS) variable for the boundary to a value that is greater than zero as a result of determining that at least one of the P block or the Q block is a weighted combination of an intra prediction block and an inter prediction block. ### Claim 5 (depends on 1) The method of claim 1, wherein the boundary is a vertical boundary. ### Claim 6 (depends on 1) The method of claim 1, wherein the boundary is a horizontal boundary. ### Claim 7 (depends on 1) The method of claim 1, further comprising generating a block of samples based on a weighted combination of an intra-prediction block and an inter-prediction block, wherein one of the P block or the Q block is the generated block of samples. ### Claim 8 (depends on 7) The method of claim 7, further comprising generating the intra-prediction block from a line of samples. ### Claim 9 (depends on 7) The method of claim 7, further comprising generating the intra-prediction block from referencing a block in a current picture. ### Claim 10 (depends on 7) The method of claim 7, further comprising generating the inter-prediction block from referencing at least one block in a previous decoded picture. ### Claim 11 (depends on 7) The method of claim 7, further comprising generating the inter-prediction block from referencing a block in a current picture. ### Claim 12 (depends on 1) The method of claim 1, further comprising: deblocking a boundary between a first sub-block and a second sub-block if a first condition is true, wherein the first condition is true if: the first sub-block is a weighted combination of a first intra prediction sub-block and a first inter prediction sub-block, the second sub-block is a weighted combination of a second intra prediction sub-block and a second inter prediction sub-block, and the weight for the first intra prediction sub-block is different from the weight for the second intra prediction sub-block. ### Claim 13 (depends on 1) A computer program product comprising a non-transitory computer readable medium storing a computer program comprising instructions which when executed by processing circuitry causes the processing circuitry to perform the method of claim 1. ### Claim 14 An apparatus, the apparatus comprising: processing circuitry; and a memory, said memory containing instructions executable by said processing circuitry, whereby said apparatus is adapted to: determine whether at least one of the P block or the Q block is a weighted combination of an intra prediction block and an inter prediction block; and as a result of determining that at least one of the P block or the Q block is a weighted combination of an intra prediction block and an inter prediction block, deblock the boundary between the P block and the Q block. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the apparatus is further adapted to set a boundary strength (BS) variable for the boundary to a value that is greater than zero as a result of determining that at least one of the P block or the Q block is a weighted combination of an intra prediction block and an inter prediction block. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the apparatus is further adapted to generate a block of samples based on a weighted combination of an intra-prediction block and an inter-prediction block, wherein one of the P block or the Q block is the generated block of samples. ### Claim 17 (depends on 16) The apparatus of claim 16, further configured to generate the intra-prediction block from a line of samples. ### Claim 18 (depends on 16) The apparatus of claim 16, further configured to generate the intra-prediction block from referencing a block in a current picture. ### Claim 19 (depends on 16) The apparatus of claim 16, further configured to generate the inter-prediction block from referencing at least one block in a previous decoded picture. ### Claim 20 (depends on 16) The apparatus of claim 16, further configured to generate the inter-prediction block from referencing a block in a current picture.