公开(公告)号：US11356709B2

公开(公告)日：2022-06-07

申请号：US14963727

申请日：2015-12-09

Applicant: ARRIS Enterprises LLC

Inventor： Wayne D. Michelsen ,  Swaroop Chanda ,  Wei Zhou ,  Jane Perera

IPC: H04N9/00 ,  H04N19/87 ,  H04N19/194 ,  H04N19/615 ,  H04N19/172 ,  H04N19/107 ,  H04N19/142 ,  H04N19/146 ,  H04N19/51

Abstract: A method is provided to better detect a scene change to provide a prediction to an encoder to enable more efficient encoding. The method uses a Motion Compensated Temporal Filter (MCTF) that provides motion estimation and is located prior to an encoder. The MCTF provides a Motion Compensated Residual (MCR) used to detect the scene change transition. When a scene is relatively stable, the MCR score is also relatively stable. However, when a scene transition is in process, the MCR score behavior changes, Algorithmically, the MCR score is used by comparing the sliding mean of the MCR score to the sliding median. This comparison highlights the transition points. In the case of a scene cut, the MCR score exhibits a distinct spike. In the case of a fade or dissolve, the MCR score exhibits a transitional period of degradation followed by recovery. By implementing the above detection using the MCR, the location of the I-pictures in the downstream encoding process can be accurately determined for the encoder.

公开(公告)号：US11758198B2

公开(公告)日：2023-09-12

申请号：US17677362

申请日：2022-02-22

Applicant: ARRIS Enterprises LLC

Inventor： Wayne D. Michelsen ,  Swaroop Chanda ,  Wei Zhou ,  Jane Perera

IPC: H04N19/00 ,  H04N19/87 ,  H04N19/194 ,  H04N19/615 ,  H04N19/172 ,  H04N19/107 ,  H04N19/142 ,  H04N19/146 ,  H04N19/51

CPC classification number: H04N19/87 ,  H04N19/107 ,  H04N19/142 ,  H04N19/146 ,  H04N19/172 ,  H04N19/194 ,  H04N19/51 ,  H04N19/615

Abstract: A method is provided to better detect a scene change to provide a prediction to an encoder to enable more efficient encoding. The method uses a Motion Compensated Temporal Filter (MCTF) that provides motion estimation and is located prior to an encoder. The MCTF provides a Motion Compensated Residual (MCR) used to detect the scene change transition. When a scene is relatively stable, the MCR score is also relatively stable. However, when a scene transition is in process, the MCR score behavior changes, Algorithmically, the MCR score is used by comparing the sliding mean of the MCR score to the sliding median. This comparison highlights the transition points. In the case of a scene cut, the MCR score exhibits a distinct spike. In the case of a fade or dissolve, the MCR score exhibits a transitional period of degradation followed by recovery. By implementing the above detection using the MCR, the location of the I-pictures in the downstream encoding process can be accurately determined for the encoder.

公开(公告)号：US11451798B2

公开(公告)日：2022-09-20

申请号：US14962814

申请日：2015-12-08

Applicant: ARRIS Enterprises LLC

Inventor： Wei Zhou ,  Jane Perera ,  Wayne D. Michelsen ,  Swaroop Chanda

IPC: H04N19/184 ,  H04N19/115 ,  H04N19/86 ,  H04N19/124 ,  H04N19/51 ,  H04N19/137 ,  H04N19/179 ,  H04N19/593 ,  H04N19/117 ,  H04N19/119 ,  H04N19/136 ,  H04N19/70 ,  H04N19/85

Abstract: A system for providing improved video quality and compression efficiency during encoding by detecting video segments having film grain approaching the “Red Lady” problem. The system detects when film grain approaches the level of the “Red Lady” problem by measuring frame-by-frame temporal differences (ME scores). From the ME scores, two key indicators are identified: (1) The average temporal difference in frames with an intermediate motion level higher than frames of non-noisy video; and (2) The fluctuation of the temporal differences between frames in a group is very small. When these indicators identify a high film video, a signal is provided to an encoder which allocates less bits to I frames and more bits to P and B frames than for other frames of video without comparable film grain.

公开(公告)号：US20220394279A1

公开(公告)日：2022-12-08

申请号：US17889645

申请日：2022-08-17

Applicant: ARRIS Enterprises LLC

Inventor： Wei Zhou ,  Jane Perera ,  Wayne D. Michelsen ,  Swaroop Chanda

IPC: H04N19/184 ,  H04N19/115 ,  H04N19/86 ,  H04N19/124 ,  H04N19/51 ,  H04N19/137 ,  H04N19/179 ,  H04N19/593 ,  H04N19/117 ,  H04N19/119 ,  H04N19/136 ,  H04N19/70 ,  H04N19/85

Abstract: A system for providing improved video quality and compression efficiency during encoding by detecting video segments having film grain approaching the “Red Lady” problem. The system detects when film grain approaches the level of the “Red Lady” problem by measuring frame-by-frame temporal differences (ME scores). From the ME scores, two key indicators are identified: (1) The average temporal difference in frames with an intermediate motion level higher than frames of non-noisy video; and (2) The fluctuation of the temporal differences between frames in a group is very small. When these indicators identify a high film video, a signal is provided to an encoder which allocates less bits to I frames and more bits to P and B frames than for other frames of video without comparable film grain.

公开(公告)号：US20220174327A1

公开(公告)日：2022-06-02

申请号：US17677362

申请日：2022-02-22

Applicant: ARRIS Enterprises LLC

Inventor： Wayne D. Michelsen ,  Swaroop Chanda ,  Wei Zhou ,  Jane Perera

IPC: H04N19/87 ,  H04N19/194 ,  H04N19/615 ,  H04N19/172 ,  H04N19/107 ,  H04N19/142 ,  H04N19/146 ,  H04N19/51

Abstract: A method is provided to better detect a scene change to provide a prediction to an encoder to enable more efficient encoding. The method uses a Motion Compensated Temporal Filter (MCTF) that provides motion estimation and is located prior to an encoder. The MCTF provides a Motion Compensated Residual (MCR) used to detect the scene change transition. When a scene is relatively stable, the MCR score is also relatively stable. However, when a scene transition is in process, the MCR score behavior changes, Algorithmically, the MCR score is used by comparing the sliding mean of the MCR score to the sliding median. This comparison highlights the transition points. In the case of a scene cut, the MCR score exhibits a distinct spike. In the case of a fade or dissolve, the MCR score exhibits a transitional period of degradation followed by recovery. By implementing the above detection using the MCR, the location of the I-pictures in the downstream encoding process can be accurately determined for the encoder.