公开(公告)号：US20200021825A1

公开(公告)日：2020-01-16

申请号：US16580820

申请日：2019-09-24

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Peng YIN ,  Taoran LU ,  Tao CHEN

IPC: H04N19/33 ,  H04N19/80 ,  H04N19/59 ,  H04N19/105

Abstract: The precision of up-sampling operations in a layered coding system is preserved when operating on video data with high bit-depth. In response to bit-depth requirements of the video coding or decoding system, scaling and rounding parameters are determined for a separable up-scaling filter. Input data are first filtered across a first spatial direction using a first rounding parameter to generate first up-sampled data. First intermediate data are generated by scaling the first up-sampled data using a first shift parameter. The intermediate data are then filtered across a second spatial direction using a second rounding parameter to generate second up-sampled data. Second intermediate data are generated by scaling the second up-sampled data using a second shift parameter. Final up-sampled data may be generated by clipping the second intermediate data.

公开(公告)号：US20190037230A1

公开(公告)日：2019-01-31

申请号：US16144971

申请日：2018-09-27

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Purvin Bibhas PANDIT ,  Peng YIN ,  Dong TIAN

IPC: H04N19/46 ,  H04N19/61 ,  H04N19/70 ,  H04N19/597 ,  H04N13/161 ,  H04N13/111 ,  H04N19/172 ,  H04N19/182 ,  H04N13/194

Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.

公开(公告)号：US20180213246A1

公开(公告)日：2018-07-26

申请号：US15935869

申请日：2018-03-26

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Purvin Bibhas PANDIT ,  Peng YIN ,  Dong TIAN

IPC: H04N19/46 ,  H04N19/597 ,  H04N19/70 ,  H04N19/61 ,  H04N13/194 ,  H04N19/182 ,  H04N19/172 ,  H04N13/161

CPC classification number: H04N19/46 ,  H04N13/111 ,  H04N13/161 ,  H04N13/194 ,  H04N19/172 ,  H04N19/182 ,  H04N19/597 ,  H04N19/61 ,  H04N19/70 ,  H04N2213/003

Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.

公开(公告)号：US20180152719A1

公开(公告)日：2018-05-31

申请号：US15879280

申请日：2018-01-24

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Purvin Bibhas PANDIT ,  Peng YIN ,  Dong TIAN

IPC: H04N19/46 ,  H04N19/182 ,  H04N13/00 ,  H04N19/172 ,  H04N19/597 ,  H04N19/61 ,  H04N19/70

CPC classification number: H04N19/46 ,  H04N13/111 ,  H04N13/161 ,  H04N13/194 ,  H04N19/172 ,  H04N19/182 ,  H04N19/597 ,  H04N19/61 ,  H04N19/70 ,  H04N2213/003

Abstract: Implementations are provided that relate, for example, to view tiling in video encoding and decoding. A particular method includes accessing a video picture that includes multiple pictures combined into a single picture (826), accessing information indicating how the multiple pictures in the accessed video picture are combined (806, 808, 822), decoding the video picture to provide a decoded representation of at least one of the multiple pictures (824, 826), and providing the accessed information and the decoded video picture as output (824, 826). Some other implementations format or process the information that indicates how multiple pictures included in a single video picture are combined into the single video picture, and format or process an encoded representation of the combined multiple pictures.

公开(公告)号：US20180103253A1

公开(公告)日：2018-04-12

申请号：US15728939

申请日：2017-10-10

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Taoran LU ,  Fangjun PU ,  Peng YIN ,  Tao CHEN

IPC: H04N19/124 ,  H04N19/186 ,  H04N19/59

CPC classification number: H04N19/124 ,  H04N19/126 ,  H04N19/147 ,  H04N19/157 ,  H04N19/186 ,  H04N19/59

Abstract: Methods to improve the quality of coding high-dynamic range (HDR) signals are presented. Instead of using a single chroma quantization table for all color formats, a video encoder may adaptively use separate tables for each one, and transmit the table's ID to a decoder. Examples for chroma quantization tables for video content encoded in the YCbCr (PQ) and ICtCp (PQ) color formats under a variety of color gamut containers are provided.

公开(公告)号：US20170214916A1

公开(公告)日：2017-07-27

申请号：US15410563

申请日：2017-01-19

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Taoran LU ,  Fangjun PU ,  Peng YIN ,  Tao CHEN ,  Walter J. HUSAK

IPC: H04N19/124 ,  G06T5/00 ,  H04N19/182 ,  H04N19/169 ,  H04N19/186 ,  H04N19/17

CPC classification number: H04N19/124 ,  G06T5/007 ,  G06T2207/20208 ,  H04N19/17 ,  H04N19/182 ,  H04N19/186 ,  H04N19/1887 ,  H04N19/30 ,  H04N19/85 ,  H04N19/98

Abstract: A processor for forward reshaping to a target bit depth receives an input image with an input bit depth. The input luminance range is divided into luminance bands and each band is assigned a visual importance index. The output codewords at the target bit depth are divided into codeword bins and each bin is assigned to one of the luminance bands. Each codeword bin is assigned the visual importance index of the luminance band it belongs. Each bin is allocated a number of reshaped codewords according to its visual importance index and a codeword mapping function, where bins with the highest importance index are allocated more codewords than the other bins. A signal reshaping function is generated based on the allocation of codewords, and the reshaping function is applied to the input image to generate an output image in the target bit depth.

公开(公告)号：US20250063202A1

公开(公告)日：2025-02-20

申请号：US18940641

申请日：2024-11-07

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao CHEN ,  Peng YIN ,  Taoran LU ,  Walter J. HUSAK

IPC: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

Abstract: Methods are described to communicate source color volume information in a coded bitstream using SEI messaging. Such data include at least the minimum, maximum, and average luminance values in the source data plus optional data that may include the color volume x and y chromaticity coordinates for the input color primaries (e.g., red, green, and blue) of the source data, and the color x and y chromaticity coordinates for the color primaries corresponding to the minimum, average, and maximum luminance values in the source data. Messaging data signaling an active region in each picture may also be included.

公开(公告)号：US20240214611A1

公开(公告)日：2024-06-27

申请号：US18596515

申请日：2024-03-05

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao CHEN ,  Peng YIN ,  Taoran LU ,  Walter J. HUSAK

IPC: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

CPC classification number: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

Abstract: Methods are described to communicate source color volume information in a coded bitstream using SEI messaging. Such data include at least the minimum, maximum, and average luminance values in the source data plus optional data that may include the color volume x and y chromaticity coordinates for the input color primaries (e.g., red, green, and blue) of the source data, and the color x and y chromaticity coordinates for the color primaries corresponding to the minimum, average, and maximum luminance values in the source data. Messaging data signaling an active region in each picture may also be included.

公开(公告)号：US20240214610A1

公开(公告)日：2024-06-27

申请号：US18596494

申请日：2024-03-05

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao CHEN ,  Peng YIN ,  Taoran LU ,  Walter J. HUSAK

IPC: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

CPC classification number: H04N19/70 ,  H04N19/14 ,  H04N19/186 ,  H04N19/20

Abstract: Methods are described to communicate source color volume information in a coded bitstream using SEI messaging. Such data include at least the minimum, maximum, and average luminance values in the source data plus optional data that may include the color volume x and y chromaticity coordinates for the input color primaries (e.g., red, green, and blue) of the source data, and the color x and y chromaticity coordinates for the color primaries corresponding to the minimum, average, and maximum luminance values in the source data. Messaging data signaling an active region in each picture may also be included.

公开(公告)号：US20240007678A1

公开(公告)日：2024-01-04

申请号：US18470353

申请日：2023-09-19

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Peng YIN ,  Taoran LU ,  Fangjun PU ,  Tao CHEN ,  Walter J. HUSAK

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/30 ,  H04N19/85 ,  G06T5/00

CPC classification number: H04N19/70 ,  H04N19/186 ,  H04N19/30 ,  H04N19/85 ,  G06T5/007 ,  G06T2207/20208

Abstract: In a method to improve the coding efficiency of high-dynamic range (HDR) images, a decoder parses sequence processing set (SPS) data from an input coded bitstream to detect that an HDR extension syntax structure is present in the parsed SPS data. It extracts from the HDR extension syntax structure post-processing information that includes one or more of a color space enabled flag, a color enhancement enabled flag, an adaptive_reshaping_enabled_flag, a dynamic range conversion flag, a color correction enabled flag, or an SDR_viewable_flag. It decodes the input bitstream to generate a preliminary output decoded signal, and generates a second output signal based on the preliminary output signal and the post-processing information.