Future Wei Technologies, Inc.

Huawei Technologies Co., Limited

Other

Shenzhen University

Snaptrack Incorporated

Shaobo Zhang

Xin Ru Wang

Yongliang Liu

Alexander Giladi

Xin Wang

Xin Liu

Peiyun Di

Shiguo Lian

Changquan Ai

Tingfang Tang

Haitao Yang

Wenlin Zhang

Tao Liu

Lixin Sun

Yangpo Xu

Shiguo Chen

Zaochuan Ge

Hao Ding

Weijie Wang

Xiaohua Cai

The present disclosure provides an antibacterial hydrophilic compound. The antibacterial hydrophilic compound may react, induced by light through a hydrogen abstraction group in the structural formula thereof, with a C&#x2014;H group and thus bind to a surface of a material having the C&#x2014;H group (for example, chemical fibers such as polyester, chinlon, and the like; plastics, rubbers, and other similar materials), which can impart a durable antibacterial activity and hydrophilicity to the material. The antibacterial hydrophilic compound has a relatively strong binding force to the surface of the material without damaging the mechanical properties of the raw material. The present disclosure also provides a modified material that is modified by the antibacterial hydrophilic compound.

Antibacterial hydrophilic compound and use thereof

A video frame decoding method and apparatus in order to implement efficient and fast video decoding. The method includes acquiring a target time point of a video, obtaining a frame number of a corresponding random access frame according to the target time point, obtaining a frame number of a frame that can be independently decoded, where the dependency set includes at least one dependency, and the dependency represents a correspondence between a frame number of a random access frame and a frame number of a frame that can be independently decoded, and obtaining, according to the frame number of the frame that can be independently decoded, video data of the frame that can be independently decoded, and decoding the random access frame.

Video frame decoding method and apparatus

A multimedia streaming service presentation method based on Hypertext Transport Protocol streaming, a related apparatus, and a related system are provided. The multimedia streaming service presentation method based on HTTP streaming includes: obtaining a media presentation description file of a multi-stream multimedia streaming service i; obtaining n1 multimedia streams of N multimedia streams from a content server; presenting X presentation objects formed by the n1 multimedia streams; when a presentation object a of the X presentation objects is selected, obtaining a media presentation description file of a multimedia streaming service j that has an association relationship with the presentation object a; and obtaining m1 multimedia streams of M multimedia streams according to the media presentation description file of the multimedia streaming service j. The technical solutions provided in embodiments of the present application help better implement flexible switching between a multi-stream multimedia streaming service and another multimedia streaming service.

Multimedia streaming service presentation method, related apparatus, and related system

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.

Signaling and processing content with variable bitrates for adaptive streaming

Systems, methods, and devices for spatial adaptation with dynamic adaptive streaming are disclosed. In an embodiment, systems, methods and devices are disclosed for signaling a spatial relationship of one or more tiles in a tiled presentation with an attribute in a media presentation description. In other embodiments, systems, methods and devices are disclosed for server-managed adaptive streaming wherein a client generates and transmits a spatial adaptation URL query parameter to the server for free-zooming or free view-angle spatial adaptation to a region of interest.

System and method for spatial adaptation in adaptive streaming

An apparatus including a memory configured to store content items, and a processor operably coupled to the memory and configured to generate Uniform Resource Locator (URL) signing information based on a segment URL scope descriptor. The segment URL scope descriptor authorizes a client to access a set of the content items.

Template uniform resource locator signing

A media representation adaptation method comprising obtaining an media presentation description (MPD) that comprises instructions for retrieving a plurality of media segments and their quality information, sending a quality information request, receiving the quality information that comprises a plurality of quality segments, selecting a media segment based on the quality information, sending a media segment request that requests the media segment, and receiving the media segment. A computer program product that when executed by a processor causes a network device to obtain an MPD that comprises instructions for retrieving a media content stream and quality information, determine a quality level threshold, request a quality information associated with the media content stream, receive the quality information, select a media segment with a corresponding quality segment that is greater than the quality level threshold, send a media segment request that requests the media segment, and receive the media segment.

Media quality information signaling in dynamic adaptive video streaming over hypertext transfer protocol

A content source comprising a processor configured to generate a media presentation description (MPD) file, wherein the MPD file designates a dependent media content part to be assigned to at least one depended media content part, and wherein the MPD file indicates the dependent media content part is to be accessed by a client device when an access condition for the dependent media content part is satisfied, and a transmitter operably coupled to the processor and configured to transmit the MPD file to at least one of a content server, a control server, and the client device.

Client behavior control in adaptive streaming

System and method embodiments are provided herein for efficient representation and use of initialization vectors (IVs) for encrypted segments using template mode representation in Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH). An embodiment method includes sending in a media presentation description (MPD), from a network server to a client, a template for generating a universal resource locator (URL) to obtain an IV that is used for encrypting a segment, in absence of an IV value in the MPD, receiving from the client a URL configured according to the template, and upon receiving the URL, returning an IV corresponding to the URL to the client. Another embodiment method includes receiving in a MPD, at a client from a network server, a template for generating a URL to obtain an IV that is used for encrypting a segment, upon detecting an absence of an IV value or IV base value in the MPD, configuring a URL for the IV using the template, sending the URL for the IV, and receiving an IV.

System and method for efficient support for short cryptoperiods in template mode

System and method embodiments are provided for segment integrity and authenticity for adaptive streaming. In an embodiment, the method includes receiving at a data processing system a segment of a media stream, determining, with the data processing system, a digest or a digital signature for the segment, and comparing, with the data processing system, the digest/digital signature to a correct digest or a correct digital signature to determine whether the segment has been modified.

Systems and methods for segment integrity and authenticity for adaptive streaming

The present invention teaches new solutions based on an alternative approach to controlling client behavior in adaptive streaming applications, namely, server managed adaptive streaming. in this approach, the client makes requests for streaming content and provides extra information about its behaviors, and the server verifies the information to determine if the requests can be granted. This way, even if the client is not trusted, its behaviors can be properly and effectively controlled. Moreover, all of the solutions resulting from adopting this server managed adaptive streaming approach fit into the MPEG/3GPP standards of Dynamic Adaptive Streaming over HTTP (DASH).

System and method for effectively controlling client behavior in adaptive streaming

A partial URL signing scheme for controlling access to content provided in adaptive streaming such as DASH is disclosed herein. Partial URL signing and verifying algorithms act as extensions to existing URL/URI signing techniques (e.g., IETF URI Signing). Partially signed URLs are signaled in an MPD and may take the form of a prefix, a suffix, or a substring of a URL. Individual segments of the content are requested by the client using URLs constructed based on a URL segment template with partial URL signing information provided as a query parameter for verification.

System and method for partial URL signing with applications to dynamic adaptive streaming

The present invention discloses a method for generating media information, a terminal, a server, and an adaptive streaming system. Media code streams of m types of code rate, which are generated by an AHS system, are divided into h groups, and tracing codes are separately embedded into code stream segments of each group. The tracing codes embedded into the code stream segments, and code stream group information are stored in a media presentation description MPD file. In a downloading process of a terminal, tracing of an end user that downloads media data is implemented.

Method for generating media information, terminal, server, and AHS system

In an adaptive steaming system, a media server for performing adaptive streaming on media contents sends to a client device a media presentation description (MPD) file including information specifying streaming adaptation parameters. The media server receives a request from the client device. The request includes a data object location indicator and a query string containing at least one of the values of the streaming adaptation parameters. After receiving the request, the media server selects a data object to be returned to the client device based on at least one of the data object location indicator and the query string and sends a response with the data object to the client device.

Method and apparatus for performing adaptive streaming on media contents

A client device comprising a transmitter configured to transmit a client identifier and a media presentation description (MPD) request to a content server, and a processor operably coupled to a memory and the transmitter, wherein the memory comprises computer executable instructions stored in a non-transitory computer readable medium such that when executed by the processor causes the processor to receive an MPD file following transmission of the client identifier and the MPD request, wherein the MPD file assigns a base segment to at least two variant segments, transmit a segment request to the content server following receipt of the MPD file, and receive the base segment and one of the at least two variant segments from the content server following transmission of the segment request, wherein the one of the at least two variant segments corresponds to the client identifier.

Growing community of inventors

Shenzhen, China

Shaobo Zhang