公开(公告)号：US11102495B2

公开(公告)日：2021-08-24

申请号：US15594207

申请日：2017-05-12

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Done Bugdayci Sansli ,  Joel Sole Rojals ,  Dmytro Rusanovskyy ,  Marta Karczewicz

IPC: H04N19/136 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

Abstract: Systems, methods, and computer readable media are described for processing content color volume messages. In some examples, video data is obtained. The video data can include video data obtained from a camera, encoded video data, or decoded video data. Content color volume information associated with the video data is processed. The content color volume information is indicative of the content color volume of one or more pictures of the video data. For example, the content color volume information includes a first luminance value associated with a minimum luminance of the one or more pictures, a second luminance value associated with a maximum luminance of the one or more pictures, and one or more chromaticity coordinates of one or more color primaries describing a color gamut of the one or more pictures.

公开(公告)号：US11095896B2

公开(公告)日：2021-08-17

申请号：US16155344

申请日：2018-10-09

Applicant: QUALCOMM Incorporated

Inventor： Dmytro Rusanovskyy ,  Adarsh Krishnan Ramasubramonian

IPC: H04N19/126 ,  H04N19/36 ,  H04N19/196 ,  H04N19/463 ,  H04N19/14 ,  H04N19/176 ,  H04N19/186

Abstract: A video encoder may be configured to apply a multi-stage quantization process, where residuals are first quantized using an effective quantization parameter derived from the statistics of the samples of the block. The residual is then further quantized using a base quantization parameter that is uniform across a picture. A video decoder may be configured to decode the video data using the base quantization parameter. The video decoder may further be configured to estimate the effective quantization parameter from the statistics of the decoded samples of the block. The video decoder may then use the estimated effective quantization parameter for use in determining parameters for other coding tools, including filters.

公开(公告)号：US20210176464A1

公开(公告)日：2021-06-10

申请号：US17115544

申请日：2020-12-08

Applicant: QUALCOMM Incorporated

Inventor： Bappaditya Ray ,  Geert Van der Auwera ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/107 ,  H04N19/159 ,  H04N19/186 ,  H04N19/176

Abstract: A video decoder can be configured to receive, for a first chroma component of a block of the video data, information for first residual samples that correspond to a difference between a first chroma block of the first chroma component and a first prediction block of the first chroma component; determine intermediate reconstructed samples based on the first residual samples; receive, for a second chroma component of the block of video data, information for second residual samples that correspond to a difference between a second chroma block of the second chroma component and the intermediate reconstructed samples; reconstruct the first chroma block based on the first residual samples and the first prediction block; reconstruct the second chroma block based on the second residual samples and the intermediate reconstructed samples; and output decoded video data comprising the reconstructed first chroma block and the reconstructed second chroma block.

公开(公告)号：US20210092408A1

公开(公告)日：2021-03-25

申请号：US17024551

申请日：2020-09-17

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Geert Van der Auwera ,  Vadim Seregin ,  Hilmi Enes Egilmez ,  Marta Karczewicz

IPC: H04N19/176 ,  H04N19/70 ,  H04N19/136 ,  H04N19/159 ,  H04N19/60 ,  H04N19/186 ,  H04N19/33

Abstract: An example device for coding video data includes a memory configured to store the video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine whether scaling matrices may be applied to a low-frequency non-separable transform (LFNST) coded block. The one or more processors are also configured to, based on a determination that scaling matrices may not be applied to the LFNST coded block, not applying the scaling matrices to the LFNST coded block. The one or more processors are also configured to code the video data without applying the scaling matrices to the LFNST coded block.

公开(公告)号：US20210076074A1

公开(公告)日：2021-03-11

申请号：US17014492

申请日：2020-09-08

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Muhammed Zeyd Coban ,  Vadim Seregin ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/96

Abstract: An example device for coding video data codes, in a parameter set, a first syntax element indicative of a luma coding tree block size of coding tree units (CTUs) to which the parameter set is applicable minus 5. The device codes, in the parameter set, a second syntax element indicative of a minimum luma coding block size minus 2 of luma coding blocks to which the parameter set is applicable, wherein a value of the second syntax element is in a range of 0 to a value based on the first syntax element, inclusive. The device codes the luma coding blocks to which the parameter set is applicable in accordance with the first syntax element and the second syntax element in the parameter set.

公开(公告)号：US20210076072A1

公开(公告)日：2021-03-11

申请号：US16948084

申请日：2020-09-02

Applicant: QUALCOMM Incorporated

Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban ,  Adarsh Krishnan Ramasubramonian ,  Marta Karczewicz

IPC: H04N19/70 ,  H04N19/119 ,  H04N19/103 ,  H04N19/174 ,  H04N19/157

Abstract: An example device includes a memory configured to store video data and one or more processors implemented in circuitry and communicatively coupled to the memory. The one or more processors are configured to determine whether a maximum number of merge candidates for a slice of the video data is equal to a first value. The one or more processors are configured to infer a value of a first syntax element to be equal to a second value based at least in part on the maximum number of merge candidates for the slice being equal to the first value, the first syntax element being indicative of a maximum number of merge candidates and a maximum number of merge candidates of a non-rectangular coding mode. The one or more processors are also configured to decode the slice based on the maximum number of merge candidates and the first syntax element.

公开(公告)号：US10554981B2

公开(公告)日：2020-02-04

申请号：US15588516

申请日：2017-05-05

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Joel Sole Rojals ,  Yekui Wang ,  Dmytro Rusanovskyy ,  Done Bugdayci Sansli ,  Marta Karczewicz

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/167 ,  H04N19/172 ,  H04N19/70 ,  H04N19/80 ,  H04N19/85

Abstract: Systems, methods, and computer readable media are described for generating a regional nesting message. In some examples, a video bitstream is obtained and an encoded video bitstream is generated using the video data. The encoded video bitstream includes a regional nesting message that contains a plurality of nested messages and region data defining at least a first region of a picture of the encoded video bitstream. For example, a first nested message of the regional nesting message includes a first set of data and a first region identifier indicating the first region of the picture is associated with the first set of data.

公开(公告)号：US10542261B2

公开(公告)日：2020-01-21

申请号：US15884255

申请日：2018-01-30

Applicant: QUALCOMM Incorporated

Inventor： Ye-Kui Wang ,  Fnu Hendry ,  Adarsh Krishnan Ramasubramonian

IPC: H04N19/136 ,  H04N19/31 ,  H04N19/44 ,  H04N19/184 ,  H04N19/187 ,  H04N19/70 ,  H04N19/30 ,  H04N19/59 ,  H04N19/119 ,  H04N19/169 ,  H04N19/196

Abstract: Techniques and systems are provided for decoding video data. For example, a method of decoding video data includes receiving, by a decoding device, an encoded video bitstream generated according to a first coding protocol, and determining that a base layer is to be provided to the decoding device as part of an external bitstream that is different from the received encoded video bitstream. The external bitstream is provided to the decoding device by an external source and is not provided as part of the encoded video bitstream. The base layer is encoded using a second coding protocol that is different from the first coding protocol. The method further includes determining to ignore a profile, tier, and level syntax structure assigned to the base layer in the video parameter set in response to determining the base layer is to be provided to the decoding device as part of an external bitstream. The profile, tier, and level syntax structure is assigned a zero value based on the base layer being provided as part of the external bitstream. The method further includes decoding the encoded video data of the encoded video bitstream.

公开(公告)号：US20190320174A1

公开(公告)日：2019-10-17

申请号：US16380520

申请日：2019-04-10

Applicant: QUALCOMM Incorporated

Inventor： Adarsh Krishnan Ramasubramonian ,  Dmytro Rusanovskyy ,  Marta Karczewicz

IPC: H04N19/124 ,  H04N19/196 ,  H04N19/186 ,  H04N19/172 ,  H04N19/70 ,  G06T5/00 ,  G06T5/50 ,  H04N19/136

Abstract: Techniques for decoding video data include determining a picture quantization parameter (QP) value of the picture of video data, determining an intermediate chroma QP offset value for a chroma QP value based on the picture QP value and a first function based on video characteristics of the picture of video data, determining the chroma QP value with a second function of the intermediate chroma QP offset value, and decoding the picture of video data using the chroma QP value.

公开(公告)号：US10397585B2

公开(公告)日：2019-08-27

申请号：US15176014

申请日：2016-06-07

Applicant: QUALCOMM Incorporated

Inventor： Sungwon Lee ,  Joel Sole Rojals ,  Adarsh Krishnan Ramasubramonian ,  Dmytro Rusanovskyy ,  Done Bugdayci Sansli ,  Marta Karczewicz

IPC: H04N19/186 ,  H04N19/124 ,  H04N19/132 ,  H04N19/85 ,  G06T5/00 ,  H04N1/60

Abstract: In general, techniques are described for processing high dynamic range (HDR) and wide color gamut (WCG) video data for video coding. A device comprising a memory and a processor may perform the techniques. The memory may store compacted fractional chromaticity coordinate (FCC) formatted video data. The processor may inverse compact the compacted FCC formatted video data using one or more inverse adaptive transfer functions (TFs) to obtain decompacted FCC formatted video data. The processor may next inverse adjust a chromaticity component of the decompacted FCC formatted video data based on a corresponding luminance component of the decompacted FCC formatted video data to obtain inverse adjusted FCC formatted video data. The processor may convert the chromaticity component of the inverse adjusted FCC formatted video data from the FCC format to a color representation format to obtain High Dynamic Range (HDR) and Wide Color Gamut (WCG) video data.