公开(公告)号：US09774855B2

公开(公告)日：2017-09-26

申请号：US14751373

申请日：2015-06-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shan Gao ,  Lina Sun

IPC: H04N19/124 ,  H04N17/00 ,  H04N19/85 ,  H04N19/196 ,  H04N19/14 ,  H04N19/154 ,  H04N19/174

CPC classification number: H04N19/124 ,  H04N17/004 ,  H04N19/14 ,  H04N19/154 ,  H04N19/174 ,  H04N19/197 ,  H04N19/85

Abstract: A method and a device for assessing video encoding quality. The method includes: acquiring a quantization parameter of a slice of a video frame and a quantity of bytes per pixel of the slice of the video frame of the video stream; determining complexity of content of the video according to the quantity of bytes per pixel of the slice of the video frame of the video stream; and predicting the video encoding quality according to the complexity of content of the video and the quantization parameter of the video. In the present invention, the complexity of content of the video is also considered in predicting the video encoding quality. Therefore, encoding quality predicted by a model that is obtained by considering the complexity of content of the video better satisfies subjective feelings of human eyes, thereby improving accuracy of prediction.

公开(公告)号：US09654770B2

公开(公告)日：2017-05-16

申请号：US14518164

申请日：2014-10-20

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Shan Gao ,  Lina Sun ,  Qingpeng Xie

IPC: G06F15/16 ,  H04N17/00 ,  H04N17/02 ,  H04N21/234 ,  H04N21/44 ,  H04N19/89

CPC classification number: H04N17/004 ,  H04N17/02 ,  H04N19/89 ,  H04N21/23418 ,  H04N21/44008

Abstract: In a method for evaluating media quality, media reference quality and rebuffering event distortion quality are obtained, final media quality are determined according to the obtained media reference quality and rebuffering event distortion quality, where a parameter of the rebuffering event distortion quality includes at least one of the following: the number of rebuffering events, a duration of the rebuffering event, a multiple rebuffering event interaction impact parameter, initial media quality, and a factor describing media content complexity. When media quality is calculated, impact of the multiple rebuffering event interaction impact parameter, the initial media quality, and the factor describing media content complexity on the media quality is considered, thereby making a media quality evaluation result more accurate.

公开(公告)号：US09571862B2

公开(公告)日：2017-02-14

申请号：US14469953

申请日：2014-08-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Shan Gao ,  Lei Zhang ,  Lina Sun

IPC: H04N7/12 ,  H04N19/89 ,  H04N17/00 ,  H04N19/115 ,  H04N19/61 ,  H04N19/103 ,  H04N19/85 ,  H04N21/44 ,  H04N21/6437 ,  H04L12/26

CPC classification number: H04N19/89 ,  H04L43/0835 ,  H04N17/004 ,  H04N19/103 ,  H04N19/115 ,  H04N19/61 ,  H04N19/85 ,  H04N21/44008 ,  H04N21/6437

Abstract: Embodiments of the present invention provide frame type detection and frame size detection methods and apparatuses for a video stream. The video frame type detection method includes: obtaining a size of a current video frame; obtaining a change feature value of the current video frame; obtaining an I-frame threshold of the current video frame; and determining whether the previous first video frame is an I frame according to the change feature value of the current video frame and a change feature value of the previous first video frame, the I-frame threshold of the current video frame, and the size of the current video frame, the size of the previous first video frame, and a size of a previous second video frame. The present invention provides a complete and effective frame type detection method; in addition, impact of a video frame rate is fully considered.

Abstract translation: 本发明的实施例提供了用于视频流的帧类型检测和帧大小检测方法和装置。 视频帧类型检测方法包括：获得当前视频帧的大小; 获取当前视频帧的改变特征值; 获得当前视频帧的I帧阈值; 以及根据当前视频帧的变化特征值和前一个第一视频帧的改变特征值，当前视频帧的I帧阈值以及当前视频帧的I帧阈值来确定先前的第一视频帧是否是I帧 当前视频帧，先前第一视频帧的大小，以及之前的第二视频帧的大小。 本发明提供一种完整且有效的帧类型检测方法; 另外，视频帧速率的影响也被充分考虑。

公开(公告)号：US09462169B2

公开(公告)日：2016-10-04

申请号：US14574002

申请日：2014-12-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qingpeng Xie ,  Lei Zhang ,  Shanfu Li ,  Jun Yao ,  Shan Gao

IPC: H04N5/225 ,  H04N5/232 ,  H04N5/235

CPC classification number: H04N5/2256 ,  H04N5/23222 ,  H04N5/23293 ,  H04N5/2354 ,  H04N5/2355 ,  H04N5/2356

Abstract: Embodiments of the present invention disclose a shooting method, an apparatus, and a terminal. The method includes: after it is detected that a camera is started, instructing a display screen facing a shooting person to display a preview image; obtaining a preset lighting parameter; controlling a display screen facing a shot target to provide lighting by using the preset lighting parameter; and shooting an image according to a shooting instruction. In the embodiments of the present invention, a display screen may be used as an auxiliary light source, and the display screen is controlled to provide lighting by using a preset lighting parameter, so that the quality of an image shot by a camera in a low light condition is improved.

Abstract translation: 本发明的实施例公开了一种拍摄方法，装置和终端。 该方法包括：在检测到摄像机开始之后，指示面向拍摄人物的显示屏幕显示预览图像; 获得预设的照明参数; 控制面向射击目标的显示屏幕，通过使用预设的照明参数来提供照明; 并根据拍摄说明拍摄图像。 在本发明的实施例中，显示屏可以用作辅助光源，并且通过使用预设的照明参数来控制显示屏以提供照明，使得由相机拍摄的图像的质量低 光条件得到改善。

公开(公告)号：US09419875B2

公开(公告)日：2016-08-16

申请号：US14331611

申请日：2014-07-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shan Gao ,  Lina Sun ,  Qingpeng Xie

IPC: H04L12/26 ,  H04N17/02 ,  H04N17/00

CPC classification number: H04L43/0835 ,  H04N17/00 ,  H04N17/02

Abstract: A video quality assessment method and a video quality assessment apparatus are provided. The method includes: acquiring parameter information of video data, where the parameter information includes a bit rate, a frame rate, and packet information; performing calculation according to the bit rate or the frame rate to obtain benchmark video quality of the video data; calculating the number of successively lost packets according to the packet information, and calculating the number of effective packet loss times; performing calculation according to the number of effective packet loss times to obtain video packet loss and distortion quality of the video data; and performing calculation according to the benchmark video quality and the video packet loss and distortion quality to obtain final video quality. Using the number of effective packet loss times can accurately assess videos more effectively and reduce algorithm complexity.

Abstract translation: 提供视频质量评估方法和视频质量评估装置。 该方法包括：获取视频数据的参数信息，其中参数信息包括比特率，帧速率和分组信息; 根据比特率或帧速率进行计算，以获得视频数据的基准视频质量; 根据分组信息计算连续丢失分组数，计算有效分组丢失次数; 根据有效分组丢失次数进行计算，获得视频数据丢失和视频数据的失真质量; 并根据基准视频质量和视频分组丢失和失真质量进行计算，以获得最终的视频质量。 使用有效数据包丢失次数可以更有效地准确评估视频，降低算法复杂度。

公开(公告)号：US20130314553A1

公开(公告)日：2013-11-28

申请号：US13954168

申请日：2013-07-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lina Sun ,  Shan Gao ,  Qingpeng Xie

IPC: H04N17/00

CPC classification number: H04N17/004 ,  H04N21/44008

Abstract: A video data quality assessment method and apparatus are disclosed. The video data quality assessment method includes: acquiring a compression distortion parameter of video data; acquiring a frame impairment distortion parameter/video data rebuffering parameter; and calculating a video quality parameter according to the compression distortion parameter and the frame impairment distortion parameter/video data rebuffering parameter, where the video quality parameter is a difference between the compression distortion parameter and the frame impairment distortion parameter/video data rebuffering parameter.

Abstract translation: 公开了一种视频数据质量评估方法和装置。 视频数据质量评估方法包括：获取视频数据的压缩失真参数; 获取帧损害失真参数/视频数据重排参数; 并且根据压缩失真参数和帧损害失真参数/视频数据重新接收参数来计​​算视频质量参数，其中视频质量参数是压缩失真参数和帧损害失真参数/视频数据重排参数之间的差异。