Abstract: A method and apparatus for processing a video is provided. A current image frame of a video and a mask for a first area are obtained. The Image included in the first area is to be removed from the current image frame. A first resultant image of the current image frame is obtained with an image processing network based on the current image frame and the mask. The first resultant image is an image from which the image included in the first area is removed from the current image frame. A second resultant image of a previous image frame of the current image frame is obtained. The second resultant image is an image from which the image included in the second area is removed from the previous image frame. A final resultant image of the current image frame is obtained by fusing the first resultant image and the second resultant image.

Abstract: A method and apparatus for processing a video is provided. A current image frame of a video and a mask for a first area are obtained. The Image included in the first area is to be removed from the current image frame. A first resultant image of the current image frame is obtained with an image processing network based on the current image frame and the mask. The first resultant image is an image from which the image included in the first area is removed from the current image frame. A second resultant image of a previous image frame of the current image frame is obtained. The second resultant image is an image from which the image included in the second area is removed from the previous image frame. A final resultant image of the current image frame is obtained by fusing the first resultant image and the second resultant image.

Abstract: A method for uploading video, executed by a client and including: determining encoding complexity of a target video; determining a target encoding parameter corresponding to difference information based on the difference information between the encoding complexity and a complexity threshold; and encoding the target video based on the target encoding parameter and uploading an encoded target video to a server.

Abstract: A device includes sample tray units, a sample tray transporting unit, a sample tray handling unit, and a sample tray radiation stage unit. The sample tray units are configured to load samples. The sample tray transporting unit is configured to carry a sample tray unit to a radiation room. The sample tray handling unit is between the sample tray transporting unit and the sample tray radiation stage unit, and is configured to transfer the sample tray unit on the sample tray transporting unit to the sample tray radiation stage unit or return the sample tray unit on the sample tray radiation stage unit to the sample tray transporting unit. The sample tray radiation stage unit is configured to carry the sample tray unit and move the samples to be irradiated in the sample tray unit to a particle beam radiation area to receive radiation.

Abstract: Video coding methods and apparatuses are provided. A set of two or more pictures is coded. The set includes at least a first picture coded with a first spatial resolution, and a second picture coded with a second spatial resolution different from the first spatial resolution. The set of two or more pictures is stored in a decoded picture buffer based on corresponding spatial resolutions. The set of two or more pictures stored in the decoded picture buffer is used as a set of reference pictures for coding one or more successive pictures subsequent to the set of two or more pictures. The set of two or more pictures is incorporated into a reference picture list that contains pictures with at least two different spatial resolutions.

Abstract: Disclosed are a method and apparatus for video transcoding. The method includes: performing a first transcoding operation on a first video stream based on a first transcoding parameter; obtaining first transcoding result information associated with the first transcoding operation; upon receiving a second video stream, obtaining, according to a first association relationship between transcoding result information and transcoding parameters, a second transcoding parameter corresponding to the first transcoding result information; and performing a second transcoding operation on the second video stream based on the second transcoding parameter.

Abstract: Embodiments of this application disclose a sticker presentation method performed at a first terminal. The first terminal moves, after obtaining a drag instruction for a selected target sticker in a sticker selection window, the target sticker according to an obtained drag track, and displays a drop prompt message when moving the target sticker. After obtaining a drag stop instruction for the target sticker in a message presentation interface, the first terminal presents the target sticker at a first target location at which drag stops after receiving a drop confirmation instruction triggered by the drop prompt message. In the embodiments of this application, when a sticker is presented, the sticker is randomly dropped on a message presentation interface. Such a sticker presentation manner is more vivid, interaction manners are more diversified, and a display effect is good.

Abstract: Video coding methods and apparatuses are provided. A set of two or more pictures is coded. The set includes at least a first picture coded with a first spatial resolution, and a second picture coded with a second spatial resolution different from the first spatial resolution. The set of two or more pictures is stored in a decoded picture buffer based on corresponding spatial resolutions. The set of two or more pictures stored in the decoded picture buffer is used as a set of reference pictures for coding one or more successive pictures subsequent to the set of two or more pictures. The set of two or more pictures is incorporated into a reference picture list that contains pictures with at least two different spatial resolutions.

Abstract: Embodiments of this application disclose a sticker presentation method performed at a first terminal. The first terminal moves, after obtaining a drag instruction for a selected target sticker in a sticker selection window, the target sticker according to an obtained drag track, and displays a drop prompt message when moving the target sticker. After obtaining a drag stop instruction for the target sticker in a message presentation interface, the first terminal presents the target sticker at a first target location at which drag stops after receiving a drop confirmation instruction triggered by the drop prompt message. In the embodiments of this application, when a sticker is presented, the sticker is randomly dropped on a message presentation interface. Such a sticker presentation manner is more vivid, interaction manners are more diversified, and a display effect is good.

Abstract: The latest High Efficiency Video Coding (HEVC) standard achieves significant compression efficiency improvement over the H.264 standard, at a much higher cost of computational complexity. A framework for software-based H.264 to HEVC transcoding on multicore processors and distributed systems is provided. By utilizing information extracted from the input H.264 bitstream, the transcoding process can be accelerated at a high ratio with modest visual quality loss. Wavefront Parallel Processing (WPP) and SIMD acceleration are also implemented to improve the trans coding efficiency on multi-core processors with SIMD instruction set extensions. Based on the HEVC HM 12.0 reference software and using standard HEVC test bitstreams, the proposed transcoder can achieve around 120× speed up over decoding and re-encoding based on ffmpeg and the HM software without significant R-D performance loss.

Abstract: The emerging High Efficiency Video Coding (HEVC) standard achieves significant performance improvement over H.264/AVC standard at a cost of much higher complexity. An H.264/AVC to HEVC transcoder is described for multi-core processors implementing Wavefront Parallel Processing (WPP) and SIMD acceleration, along with expedited motion estimation (ME) and mode decision (MD) by utilizing information extracted from the input H.264/AVC stream. Experiments using standard HEVC test bitstreams show that the described transcoder may achieve a 70× speed up over the HEVC HM S.1 reference software (including H.264 encoding) at very small rate distortion (RD) performance loss.

Abstract: The disclosure discloses a transmission method and a transmission apparatus based on point-to-point wireless communication. The method includes that: a state machine of a sending-receiving terminal performs state transition according to a received training frame; and when the state machine of the sending-receiving terminal is transferred to a data frame sending state, user data is sent.

Abstract: The latest High Efficiency Video Coding (HEVC) standard achieves significant compression efficiency improvement over the H.264 standard, at a much higher cost of computational complexity. A framework for software-based H.264 to HEVC transcoding on multicore processors and distributed systems is provided. By utilizing information extracted from the input H.264 bitstream, the transcoding process can be accelerated at a high ratio with modest visual quality loss. Wavefront Parallel Processing (WPP) and SIMD acceleration are also implemented to improve the trans coding efficiency on multi-core processors with SIMD instruction set extensions. Based on the HEVC HM 12.0 reference software and using standard HEVC test bitstreams, the proposed transcoder can achieve around 120× speed up over decoding and re-encoding based on ffmpeg and the HM software without significant R-D performance loss.

Abstract: The emerging High Efficiency Video Coding (HEVC) standard achieves significant performance improvement over H.264/AVC standard at a cost of much higher complexity. An H.264/AVC to HEVC transcoder is described for multi-core processors implementing Wavefront Parallel Processing (WPP) and SIMD acceleration, along with expedited motion estimation (ME) and mode decision (MD) by utilizing information extracted from the input H.264/AVC stream. Experiments using standard HEVC test bitstreams show that the described transcoder may achieve a 70× speed up over the HEVC HM S.1 reference software (including H.264 encoding) at very small rate distortion (RD) performance loss.

Abstract: The disclosure discloses a transmission method and a transmission apparatus based on point-to-point wireless communication. The method includes that: a state machine of a sending-receiving terminal performs state transition according to a received training frame; and when the state machine of the sending-receiving terminal is transferred to a data frame sending state, user data is sent.