公开(公告)号：US11765370B2

公开(公告)日：2023-09-19

申请号：US17553819

申请日：2021-12-17

Applicant: MEDIATEK INC.

Inventor： Sheng-Jen Wang ,  Ming-Long Wu

IPC: H04N11/02 ,  H04N19/44 ,  H04N19/176 ,  H04N19/119 ,  H04N19/105

CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176

Abstract: A video residual decoding apparatus includes a residual decoding circuit and a neighbor storage device. The residual decoding circuit applies residual decoding to a transform block, wherein the transform block is divided into M sub-blocks, M is a positive integer, and the M sub-blocks are processed by the residual decoding in a diagonal scan order. The neighbor storage device stores neighbor data that belong to neighboring sub-blocks and are referenced by the residual decoding of a current sub-block, wherein neighbor data belonging to a sub-block is derived from a residual decoding result of the sub-block, and a storage size of the neighbor storage device is not larger than a maximum data amount of neighbor data derived from residual decoding results of N sub-blocks, where N is a positive integer, and N is smaller than M.

公开(公告)号：US20230059794A1

公开(公告)日：2023-02-23

申请号：US17855829

申请日：2022-07-01

Applicant: MEDIATEK INC.

Inventor： Sheng-Jen Wang ,  Chao-I Wu ,  Ming-Long Wu ,  Chia-Yun Cheng

IPC: H04N19/44 ,  H04N19/13 ,  H04N19/423

Abstract: A context-based adaptive binary arithmetic coding (CABAC) decoder includes a bin decode circuit and a context update circuit. The bin decode circuit supports decoding of multiple bins in one cycle. The multiple bins include a first bin and a second bin. The bin decode circuit generates a bin value of the first bin according to a first set of multiple contexts, a first range and a first offset, and generates one bin value of the second bin according to a second set of multiple contexts, a second range and a second offset. The context update circuit updates the first set of multiple contexts in response to the bin value of the first bin, to generate a first set of multiple updated contexts, and updates the second set of multiple contexts in response to said one bin value of the second bin, to generate a second set of multiple updated contexts.

公开(公告)号：US20230024545A1

公开(公告)日：2023-01-26

申请号：US17571566

申请日：2022-01-10

Applicant: MEDIATEK INC.

Inventor： Sheng-Jen Wang ,  Ming-Long Wu

IPC: H04N19/423 ,  H04N19/176 ,  H04N19/119 ,  H04N19/129 ,  H04N19/70 ,  H04N19/124 ,  H04N19/60

Abstract: A video residual decoding apparatus is used for applying residual decoding to a transform block that is divided into sub-blocks, and includes a residual decoding circuit and a storage device. The residual decoding circuit enters a coefficient loop for decoding one or more syntax elements at each of coefficient positions within a sub-block that has at least one non-zero coefficient level. The coefficient loop includes one decoding pass and at least one other decoding pass. During the at least one other decoding pass, the residual decoding circuit records side information in the storage device, where the side information is indicative of specific coefficient positions at which specific syntax elements need to be decoded in the one decoding pass. During the one decoding pass, the residual decoding circuit refers to the side information for decoding the specific syntax elements at the specific coefficient positions, respectively.

公开(公告)号：US20170195693A1

公开(公告)日：2017-07-06

申请号：US15468132

申请日：2017-03-24

Applicant: MEDIATEK INC.

Inventor： Sheng-Jen Wang ,  Yung-Chang Chang ,  Chia-Yun Cheng

IPC: H04N19/91 ,  H04N19/423

CPC classification number: H04N19/91 ,  H04N19/423

Abstract: A backward adaptation apparatus includes a first storage apparatus, a count table maintenance apparatus, and a backward probability update circuit. The first storage apparatus has a first buffer and a second buffer allocated therein. The first buffer stores a first probability table involved in processing of a first frame. The second buffer stores a second probability table selectable for processing of a second frame following the first frame. The count table maintenance apparatus maintains a count table, wherein the count table maintenance apparatus has at least one count data updating circuit shared for dynamically updating the count table during the processing of the first frame. The backward probability update circuit refers to information of the count table and information of the first probability table to calculate the second probability table in the second buffer at an end of the processing of the first frame.

公开(公告)号：US10375395B2

公开(公告)日：2019-08-06

申请号：US15439964

申请日：2017-02-23

Applicant: MEDIATEK INC.

Inventor： Sheng-Jen Wang ,  Yung-Chang Chang ,  Chia-Yun Cheng

IPC: H04N19/13 ,  H04N19/70 ,  G06F13/28 ,  H04N19/91 ,  H04N19/42

Abstract: A video processing apparatus includes an external storage device, a hardware entropy engine, and a software execution engine. The hardware entropy engine performs entropy processing of a current picture, and further outputs count information to the external storage device during the entropy processing of the current picture. When loaded and executed by the software execution engine, a software program instructs the software execution engine to convert the count information into count table contents, and generate a count table in the external storage device according to at least the count table contents. The count table is referenced to apply a backward adaptation to a probability table that is selectively used by the hardware entropy engine to perform entropy processing of a next picture.

公开(公告)号：US09813739B2

公开(公告)日：2017-11-07

申请号：US15468132

申请日：2017-03-24

Applicant: MEDIATEK INC.

Inventor： Sheng-Jen Wang ,  Yung-Chang Chang ,  Chia-Yun Cheng

IPC: H04N19/10 ,  H04N19/91 ,  H04N19/423

CPC classification number: H04N19/91 ,  H04N19/423

Abstract: A backward adaptation apparatus includes a first storage apparatus, a count table maintenance apparatus, and a backward probability update circuit. The first storage apparatus has a first buffer and a second buffer allocated therein. The first buffer stores a first probability table involved in processing of a first frame. The second buffer stores a second probability table selectable for processing of a second frame following the first frame. The count table maintenance apparatus maintains a count table, wherein the count table maintenance apparatus has at least one count data updating circuit shared for dynamically updating the count table during the processing of the first frame. The backward probability update circuit refers to information of the count table and information of the first probability table to calculate the second probability table in the second buffer at an end of the processing of the first frame.

公开(公告)号：US09641854B2

公开(公告)日：2017-05-02

申请号：US14712900

申请日：2015-05-14

Applicant: MEDIATEK INC.

Inventor： Sheng-Jen Wang ,  Yung-Chang Chang ,  Chia-Yun Cheng

IPC: H04N19/10 ,  H04N19/423 ,  H04N19/91

CPC classification number: H04N19/91 ,  H04N19/423

Abstract: A count table maintenance apparatus for maintaining a count table referenced to apply a backward adaptation to a probability table. The count table maintenance apparatus includes a count data access interface, at least one buffer, and at least one count data updating circuit. The count data access interface determines a read address and a write address of the storage apparatus. The at least one buffer buffers at least one input count data, wherein the at least one input count data is derived from count data read from the count table according to the read address. The at least one count data updating circuit updates the at least one input count data read from the at least one buffer to generate at least one updated count data, and store the at least one updated count data into the storage apparatus according to the write address.

公开(公告)号：US20150334387A1

公开(公告)日：2015-11-19

申请号：US14712900

申请日：2015-05-14

Applicant: Mediatek Inc.

Inventor： Sheng-Jen Wang ,  Yung-Chang Chang ,  Chia-Yun Cheng

IPC: H04N19/10

CPC classification number: H04N19/91 ,  H04N19/423

Abstract: A count table maintenance apparatus for maintaining a count table referenced to apply a backward adaptation to a probability table. The count table maintenance apparatus includes a count data access interface, at least one buffer, and at least one count data updating circuit. The count data access interface determines a read address and a write address of the storage apparatus. The at least one buffer buffers at least one input count data, wherein the at least one input count data is derived from count data read from the count table according to the read address. The at least one count data updating circuit updates the at least one input count data read from the at least one buffer to generate at least one updated count data, and store the at least one updated count data into the storage apparatus according to the write address.

Abstract translation: 一种计数表维护装置，用于维持参考的计数表以对概率表应用反向适配。 计数表维护装置包括计数数据访问接口，至少一个缓冲器和至少一个计数数据更新电路。 计数数据访问接口确定存储装置的读取地址和写入地址。 至少一个缓冲器缓冲至少一个输入计数数据，其中根据读取的地址从计数表读出的计数数据导出至少一个输入计数数据。 所述至少一个计数数据更新电路更新从所述至少一个缓冲器读取的所述至少一个输入计数数据以生成至少一个更新的计数数据，并且根据所述写入地址将所述至少一个更新的计数数据存储到所述存储装置中 。

公开(公告)号：US20230034698A1

公开(公告)日：2023-02-02

申请号：US17553819

申请日：2021-12-17

Applicant: MEDIATEK INC.

Inventor： Sheng-Jen Wang ,  Ming-Long Wu

IPC: H04N19/44 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176

Abstract: A video residual decoding apparatus includes a residual decoding circuit and a neighbor storage device. The residual decoding circuit applies residual decoding to a transform block, wherein the transform block is divided into M sub-blocks, M is a positive integer, and the M sub-blocks are processed by the residual decoding in a diagonal scan order. The neighbor storage device stores neighbor data that belong to neighboring sub-blocks and are referenced by the residual decoding of a current sub-block, wherein neighbor data belonging to a sub-block is derived from a residual decoding result of the sub-block, and a storage size of the neighbor storage device is not larger than a maximum data amount of neighbor data derived from residual decoding results of N sub-blocks, where N is a positive integer, and N is smaller than M.

公开(公告)号：US20230021722A1

公开(公告)日：2023-01-26

申请号：US17586742

申请日：2022-01-27

Applicant: MEDIATEK INC.

Inventor： Kai-Chun Lin ,  Sheng-Jen Wang ,  Chi-Hung Chen

IPC: H04N19/137 ,  H04N19/105 ,  H04N19/80 ,  H04N19/176

Abstract: A motion vector refinement apparatus includes a storage device, a reference block fetch circuit, and a processing circuit. The reference block fetch circuit fetches a forward reference block and a backward reference block according to at least specified motion vectors (MVs) of a current block, and stores the forward reference block and the backward reference block into the storage device. The processing circuit derives a first reference block from the forward reference block and a second reference block from the backward reference block, calculates at least one accumulated pixel difference (APD) value for at least one block pair each having a first block found in the first reference block and a second block found in the second reference block, and determines an offset setting for motion vector refinement of the specified MVs according to the at least one APD value.