Abstract: Correlated quality-of-experience (QoE) and latency measures are generated at a plurality of monitoring points along a multimedia delivery chain including multiple video operations. At each of the plurality of monitoring points, an absolute QoE measure defined on a human perceptual quality scale for media content is computed, and one or more of content extraction or feature extraction on the media content are performed. To a common middleware from each of the plurality of monitoring points, the respective QoE measure and results of the one or more of content extraction or feature extraction are transmitted. Computing and updating an absolute QoE measure for each of the plurality of monitoring points is performed. Computing and updating latencies between multiple monitoring points at the middleware using the results from each of the plurality of monitoring points is also performed.

Abstract: Disclosed are a method for controlling a headphone mode, a headphone device, a head-mounted device and a storage medium. The method for controlling the headphone mode includes the following steps: receiving image data sent by a head-mounted device, where the head-mounted device is configured to obtain the image data by capturing external environment by an image sensor on the head-mounted device; analyzing the received image data, and detecting whether the external environment meets a first target condition, where the first target condition is that a target object exists in the external environment or that the target object in a target state exists in the external environment; and in response to determining that the external environment meets the first target condition, turning on a transparent mode.

Abstract: The present invention provides a silicon carbide composite wafer and a manufacturing method thereof. The silicon carbide composite wafer includes (a) a silicon carbide material and (b) a wafer substrate, and the upper surface of the wafer substrate is bonded to the lower surface of the silicon carbide material, wherein the lower surface of the silicon carbide material and/or the upper surface of the wafer substrate undergo a surface modification, thereby allowing the silicon carbide material to be bonded to the wafer substrate directly and firmly. The technical effects of the present invention include achieving strong bonding between the wafer and the substrate, reducing manufacturing process, increasing yield rate, and achieving high industrial applicability.

Abstract: Disclosed are a method of detecting earphone wearing, an earphone and a storage medium, and the present application belongs to the technical field of active noise cancellation (ANC). The earphone includes at least two capacitive sensors. The method of detecting earphone wearing includes the following steps: determining whether the earphone is in the wearing state; in response to that capacitance values of all the capacitive sensors are less than a corresponding initial threshold value, determining that the earphone falls out; and in response to that a capacitance value of at least one capacitive sensor is not less than the corresponding initial threshold value, determining that the earphone becomes loose.

Abstract: Disclosed are a self-adaptive adjustment method of active noise cancellation (ANC) parameter, a device and a computer-readable storage medium. The method includes: obtaining frequency points of noise reduction headphone with energy loss and energy loss values of each frequency point, and determining a quantity of the frequency points with the energy loss values are greater than a first energy loss threshold; determining whether a sum of the energy loss values is greater than a second energy loss threshold, and determining whether the quantity of frequency points is greater than a preset frequency point quantity threshold.

Abstract: A method, system and apparatus provides network communication between a sender and a receiver in a communication network. At a sender side of the network communication a ciphertext is encoded into a stegotext in a target language using a randomized language model, the ciphertext based upon an original content in a source language. The stegotext randomly generated by the language model to be decoupled from the original content and to have an assigned context in the target language that corresponds to the network communication in the target language. The stegotext is transmitted to a receiver over multiple communication channels of a communication network using one or more applications on an application layer of the communication network.

Abstract: Disclosed are a method and a device of active noise reduction for an earphone, an active noise reduction earphone, and a computer readable storage medium. The method of active noise reduction for the earphone includes the following steps: obtaining wearing posture change information of the earphone relative to a wearer; determining whether to adjust a current active noise reduction parameter according to the wearing posture change information; and in response to that the current active noise reduction parameters is adjusted, performing a preset adjustment operation on the current active noise reduction parameter.

Abstract: Disclosed are a method and a device of active noise reduction for an earphone, and an active noise reduction earphone and a computer-readable storage medium. The method of active noise reduction for the earphone includes the following steps: obtaining wearing fit information of the earphone, the earphone includes a first earphone and a second earphone; obtaining optimal noise reduction information of the earphone according to the wearing fit information; obtaining a common noise reduction amount according to the optimal noise reduction information; and controlling the first earphone and the second earphone to reduce noise according to the common noise reduction amount.

Abstract: A ceramic wafer includes an upper surface and a lower surface, and the ceramic wafer includes at least one curved surface. A manufacturing method of the ceramic wafer includes the steps of: performing a high-temperature sintering process on a ceramic green body to produce a ceramic material; and performing a processing process on the ceramic material to form the ceramic wafer, wherein the processing process is used to change the shape of the ceramic material and thereby form the ceramic wafer. The ceramic wafer and the manufacturing method thereof are advantageous in that by forming a warped or bowed ceramic wafer, it is made possible for the surface tension or surface internal stress resulting from forming a thick integrated circuit film on the ceramic wafer to pull the ceramic wafer into a relatively flat configuration suitable for subsequent manufacturing processes that require wafer flatness.

Abstract: Classifying video for encoding optimization may include computing a content complexity score of a video, the content complexity score indicating a measure of how detailed the video is in terms of spatial and temporal information, categorizing the video into one of a plurality of buckets according to the content complexity score, each bucket representing a category of video content having a different range of content complexity scores and being associated with a ladder specific to the range, and encoding the video according to the ladder of the one of the plurality of buckets into which the video is categorized.

Abstract: Classifying video for encoding optimization may include computing a content complexity score of a video, the content complexity score indicating a measure of how detailed the video is in terms of spatial and temporal information, categorizing the video into one of a plurality of buckets according to the content complexity score, each bucket representing a category of video content having a different range of content complexity scores and being associated with a ladder specific to the range, and encoding the video according to the ladder of the one of the plurality of buckets into which the video is categorized.

Abstract: The present invention provides a ceramic wafer with a surface shape and a manufacturing method thereof. The ceramic wafer has an upper surface and a lower surface, and at least one of the upper surface and the lower surface has an irregular surface shape. The total thickness variation (TTV) value between the two surfaces ranges from 0.1 to 100 ?m. The ceramic wafer with the surface shape of the present invention, by controlling the total thickness variation of the wafer, not only helps the coating, but also improves the flow of the fluid, and can improve the bonding force of the coating and reduce the surface defects in the subsequent process.

Abstract: A method and apparatus for intrusion detection includes generating graph data from a sequence of messages in a communication network. The graph data denotes a node for each message identifier in the sequence of messages and an edge for each pair of consecutive message identifiers. Pair counts are generated for edges in the graph data as a number of times the associated pair of consecutive message identifiers occurs in the sequence. Input feature vectors are generated for nodes in the graph data. The vectors include data content of messages associated with the node and a pair count for each edge connected to the node. The input feature vectors are processed through a first graph neural network, based on the graph data, and then through one or more layers of a classifier to classify the sequence of messages as containing an anomaly or not.

Abstract: Macroblocking artifacts are assessed in an encoded video. Edges are detected and edge strengths are computed at macroblock boundaries in each decoded frame of the video. The detected edges are paired at horizontal or vertical sides of each macroblock to identify macroblock edge pairs. A macroblocking level of the frame is identified according to the macroblock edge pairs. For instance, for each of the macroblock edge pairs, the edges of the pair are identified as being macroblocking edges if edge strengths of both sides of the pair exceed a significance threshold, and the macroblocking level of the frame is determined by aggregating the macroblocking edges in the frame.

Abstract: A composite substrate and a manufacturing method thereof are provided. By disposing a plurality of interlayers between a carrier plate and a substrate, a strong bonding force between the layers can be ensured, and the difference between the coefficients of thermal expansion of the layers is allowed to be adjusted to prevent such drawbacks as the substrate being likely to break.

Abstract: Frames of a video stream collected at first and second points along a video delivery chain are buffered into first and second buffers, respectively, the second point being downstream the video delivery chain from the first point. A control group is identified as a subset of frames of the second buffer. Correlations of extracted features of the control group to extracted features of successive windows of frames of the first buffer are computed, the extracted features being based on spatial information and temporal information of the video stream. A delay between the video stream collected at the first point and the video stream collected at the second point is identified according to a maximum correlation of the correlations.

Abstract: A source quality of a source video and a source content complexity of the source video are identified. Parameter constraints with respect to parameters of an operation are received. The source video quality, source content complexity, and parameter constraints are applied to a deep neural network (DNN) producing DNN outputs. In an example, the DNN outputs are combined using domain knowledge to provide the filter parameters, as predicted, to a filter chain, such that applying the filter chain to the input source video results in an output video achieving the full reference video quality score. In another example, the DNN outputs are combined using domain knowledge to provide the filter parameters, as predicted, to a filter chain, such that applying the filter chain to the input source video results in an output video achieving the full reference video quality score.

Abstract: A method or system is disclosed to assess transmission errors in a visual media input. Domain knowledge is obtained from the visual media input by content analysis, codec analysis, distortion analysis, and human visual system modeling. The visual media input is divided into partitions, which are passed into deep neural networks (DNNs). The DNN outputs of all partitions are combined with the guidance of domain knowledge to produce an assessment of the transmission error. In one or more illustrative examples, transmission error assessment at a plurality of monitoring points in a visual media communication system is collected and assessed, followed by quality control processes and statistical performance assessment on the stability of the visual communication system.

Abstract: The present invention provides a silicon carbide composite wafer and a manufacturing method thereof. The silicon carbide composite wafer includes (a) a silicon carbide material and (b) a wafer substrate, and the upper surface of the wafer substrate is bonded to the lower surface of the silicon carbide material, wherein the lower surface of the silicon carbide material and/or the upper surface of the wafer substrate undergo a surface modification, thereby allowing the silicon carbide material to be bonded to the wafer substrate directly and firmly. The technical effects of the present invention include achieving strong bonding between the wafer and the substrate, reducing manufacturing process, increasing yield rate, and achieving high industrial applicability.

Abstract: Correlated quality-of-experience (QoE) and latency measures are generated at a plurality of monitoring points along a multimedia delivery chain including multiple video operations. At each of the plurality of monitoring points, an absolute QoE measure defined on a human perceptual quality scale for media content is computed, and one or more of content extraction or feature extraction on the media content are performed. To a common middleware from each of the plurality of monitoring points, the respective QoE measure and results of the one or more of content extraction or feature extraction are transmitted. Computing and updating an absolute QoE measure for each of the plurality of monitoring points is performed. Computing and updating latencies between multiple monitoring points at the middleware using the results from each of the plurality of monitoring points is also performed.