Abstract: An image presentation method, where the method includes obtaining identification information of a first object when a switching instruction for switching the first object to a second object is received, where one of the first object or the second object is a first 360-degree panorama, the other is a first strip panorama, the first strip panorama includes multiple front sub-images used to display a first region, an ith front sub-image in the multiple front sub-images corresponds to a front image in a jth 360-degree panorama in multiple 360-degree panoramas and displays an ith sub-region in the first region, and the first 360-degree panorama is one of the multiple 360-degree panoramas, obtaining, according to the identification information of the first object, the second object corresponding to the identification information of the first object, and presenting the second object.

Abstract: A streaming media information processing method includes obtaining target spatial information of a target spatial object, where the target spatial object is one of two spatial objects that are associated with data of two images that is in target video data, the target spatial information includes same-attribute spatial information, the same-attribute spatial information includes same information between respective spatial information of the two spatial objects, and spatial information of a spatial object other than the target spatial object in the two spatial objects includes the same-attribute spatial information, and determining, based on the target spatial information, video data that needs to be played.

Abstract: This disclosure provides an image encoding method and apparatus and an image decoding method and apparatus. For a to-be-encoded image in a to-be-encoded video sequence, a reference image may be selected from at least one knowledge-base image in a knowledge-base image set. In addition, bitstream data of the to-be-encoded image includes identification information used to identify the reference image of the to-be-encoded image.

Abstract: Embodiments of the present invention provide a streaming-technology based video data processing method and apparatus. The method includes: obtaining a media presentation description, where the media presentation description includes index information of video data; obtaining the video data based on the index information of the video data; obtaining tilt information of the video data; and processing the video data based on the tilt information of the video data. According to the video data processing method and apparatus in the embodiments of the present invention, information received by a client includes tilt information of video data, and the client may adjust a presentation manner for the video data based on the tilt information.

Abstract: The present disclosure disclose example video stream transmission methods and related devices and systems. One example method includes sending, by a client, a target request to a server, where the target request includes information about a corresponding target spatial location of a target spatial object that needs to be presented upon request by the client in a virtual reality VR content component. A target request feedback by which the server responds to the target request is received by the client, where the target request feedback includes information about a multiplex video stream that is obtained by performing preset multiplexing processing on an original video stream corresponding to the target spatial object. Video parsing and presentation based on the information about the multiplex video stream is performed by the client.

Abstract: Example video data processing methods and apparatus are disclosed. One example method includes obtaining viewport information by a server. The server obtains spatial object information based on the viewport information, where the spatial object information is used to describe a specified spatial object in panoramic space. The server obtains a first bitstream that is obtained by encoding image data in the specified spatial object. The server obtains a second bitstream that is obtained by encoding image data in the panoramic space. The server transmits the first bitstream and the second bitstream to a client.

Abstract: A method and an apparatus for processing video data. The method includes: parsing media presentation description to obtain flag information, where the flag information is used to identify a first representation of a video, where playing duration of a segment in the first representation is shorter than playing duration of a segment in a second representation of the video; obtaining switching instruction information, where the switching instruction information is used to instruct to switch from a current spatial object to a target spatial object; determining a target representation from the first representation of the video based on the flag information and the switching instruction information, where the target representation corresponds to the target spatial object; and obtaining a current playing moment of the video, and obtaining a target representation segment based on the current playing moment and the target representation.

Abstract: Embodiments of the present invention provide a method for synchronous playback by multiple smart devices, and an apparatus. A first device acquires frame synchronization information at intervals of a preset time, and sends the frame synchronization information to one or more second devices, where the frame synchronization information is frame information of a frame to be played by the first device or frame information of a frame that the first device starts to play currently; and after learning the frame synchronization information sent by the first device, the second device adjusts frame resources played by itself. Because the multiple smart devices that perform synchronous playback are generally in one local area network, a transmission delay of frame information from the first device to the second device can be ignored, thereby improving a synchronization effect among the multiple smart devices.

Abstract: An image switching method and apparatus. The method includes: displaying an image in a first format; receiving an input instruction for switching the image from the first format to a second format; and displaying the image in the second format. The first format is a panorama image format or a wide-view image format, the second format is a panorama image format or a wide-view image format, and the first format is different from the second format. According to the method and the device in the embodiments of the present invention, a manner of simple and flexible interaction between a panorama image and a street side image is provided.

Abstract: An image presentation method, where the method includes obtaining identification information of a first object when a switching instruction for switching the first object to a second object is received, where one of the first object or the second object is a first 360-degree panorama, the other is a first strip panorama, the first strip panorama includes multiple front sub-images used to display a first region, an ith front sub-image in the multiple front sub-images corresponds to a front image in a jth 360-degree panorama in multiple 360-degree panoramas and displays an ith sub-region in the first region, and the first 360-degree panorama is one of the multiple 360-degree panoramas, obtaining, according to the identification information of the first object, the second object corresponding to the identification information of the first object, and presenting the second object.

Abstract: Different representations are associated with an instance of media content, and a representation can include multiple portions of media content. A respective quality value and bitrate can be associated with each of the portions. Information about the instance of content, including bitrate and quality information, can be accessed by and/or sent to a client. The quality information indicates the availability of measures of quality (e.g., quality values) and where those quality values reside or how they can be retrieved. The client can use quality as well as bitrate to make more intelligent decisions while streaming the content. For example, while the content is being downloaded over a network, the client can adapt to changes in available network bandwidth by selecting one portion of the instance of media content over another based not just on its bitrate but also based on its quality value.

Abstract: Different representations are associated with an instance of media content, and a representation can include multiple portions of media content. A respective quality value and bitrate can be associated with each of the portions. Information about the instance of content, including bitrate and quality information, can be accessed by and/or sent to a client. The quality information indicates the availability of measures of quality (e.g., quality values) and where those quality values reside or how they can be retrieved. The client can use quality as well as bitrate to make more intelligent decisions while streaming the content. For example, while the content is being downloaded over a network, the client can adapt to changes in available network bandwidth by selecting one portion of the instance of media content over another based not just on its bitrate but also based on its quality value.

Abstract: Disclosure of the present invention provide a method and an apparatus for processing a video stream. The method includes: acquiring a request message from a terminal, where the request message carries address information of multiple sub video screens, according to the address information, acquiring multiple substreams corresponding to the multiple sub video screens in a one-to-one manner, merging the multiple substreams into a single stream, and generating an indication message used to indicate a picture parameter of the single stream, and sending the single stream and the indication message to the terminal, so that the terminal decodes the single stream and displays decoded multiple sub video screens according to the indication message.

Abstract: Embodiments of the present invention disclose a method, a device, and a system for self-adaptively adjusting a data transmission rate, which solve the problem of network buffer overflow. The method includes: receiving parameters sent by a client; calculating a predicted value of a data sending rate according to a maximum value of a network buffer and the received parameters; judging whether the predicted value of the data sending rate is less than an original service bit rate; and if the predicted value of the data sending rate is less than the original service bit rate, discarding data of at least one data unit in a send buffer. The method, the device, and the system are mainly applied to adjust the data transmission rate, and especially to adjust the data transmission rate in a time-varying network.

Abstract: A communication method, a user device, a content server and a controller are provided. The communication method comprises sending a first access request for a segment of depended content to a content server, wherein the depended content comprises at least one segment, receiving an access receipt from the content server, wherein the access receipt contains information describing present access to the segment of the depended content by a user device, and storing the access receipt such that the control capability of the network on behavior of the user device is enhanced while reserving enough flexibility of the user device.

Abstract: An image switching method and apparatus. The method includes: displaying an image in a first format; receiving an input instruction for switching the image from the first format to a second format; and displaying the image in the second format. The first format is a panorama image format or a wide-view image format, the second format is a panorama image format or a wide-view image format, and the first format is different from the second format. According to the method and the device in the embodiments of the present invention, a manner of simple and flexible interaction between a panorama image and a street side image is provided.

Abstract: Embodiments of the present invention provide a streaming media segment preparation method and apparatus. The method includes: determining at least one quality point, where the at least one quality point is separately used to indicate quality of at least one target segment of streaming media in a first time period; and determining, according to the at least one quality point, the at least one target segment of the streaming media in the first time period. In the embodiments of the present invention, streaming media segments are prepared by taking a quality factor of the streaming media segments into consideration, which may avoid the problem that redundant segments are generated during preparation of the streaming media segments according to bit rates, thereby reducing a storage volume of a server.

Abstract: A method for adaptive streaming of a media content, wherein the method comprises receiving a media presentation description that provides presentation information for the media content, determining a plurality of representations from the media presentation description that comprise segments that are provided with bitrate and quality information, selecting a media segment that meets a desired quality level to download from one of the representations, updating a buffered media time for downloading the media segment, and determining when to switch to another representation by comparing the buffered media time to a switching threshold value.

Abstract: A method for adaptive streaming of a media content, wherein the method comprises receiving a media presentation description that provides presentation information for the media content, determining a plurality of representations from the media presentation description that comprise segments that are provided with bitrate and quality information, selecting a media segment that meets a desired quality level to download from one of the representations, updating a buffered media time for downloading the media segment, and determining when to switch to another representation by comparing the buffered media time to a switching threshold value.

Abstract: Embodiments of the present invention provide a method for synchronous playback by multiple smart devices, and an apparatus. A first device acquires frame synchronization information at intervals of a preset time, and sends the frame synchronization information to one or more second devices, where the frame synchronization information is frame information of a frame to be played by the first device or frame information of a frame that the first device starts to play currently; and after learning the frame synchronization information sent by the first device, the second device adjusts frame resources played by itself. Because the multiple smart devices that perform synchronous playback are generally in one local area network, a transmission delay of frame information from the first device to the second device can be ignored, thereby improving a synchronization effect among the multiple smart devices.