Abstract: A wearing detection method, a wearable device, and a storage medium are provided. When the wearable device does not play audio and obtains a first audio signal captured by the microphone, the wearable device outputs a second audio signal by using the speaker, obtains a third audio signal captured by the microphone, obtains a signal feature of the third audio signal, and determines a wearing status of the wearable device based on the signal feature of the third audio signal. In this way, the wearing status of the wearable device can be determined by outputting the second audio signal and performing feature analysis on the corresponding input third audio signal, without a need of an additional sensor, thereby reducing sensor stacking.

Abstract: A point cloud attribute information encoding method includes: obtaining first information; determining, based on second information associated with the first information, whether to perform DCT transform on K to-be-coded points; in a case that it is determined to perform DCT transform on the K to-be-coded points, performing DCT transform on the K to-be-coded points to obtain a transform coefficient of the K to-be-coded points; and quantizing the transform coefficient of the K to-be-coded points and performing entropy coding based on a quantized transform coefficient, to generate a binary bit stream. The first information includes the K to-be-coded points and the second information includes attribute prediction information for the K to-be-coded points; or the first information includes N coded points prior to the K to-be-coded points and the second information includes attribute reconstruction information for the N coded points.

Abstract: A prediction method, an encoder, a decoder, and a computer storage medium are provided. The prediction method applied to an encoder includes: determining a spatial block in which an encoding point is located; constructing a prediction model according to the spatial block; acquiring a value of a first colour component and a value of a second colour component of the encoding point; obtaining a prediction value of the second colour component of the encoding point by using the prediction model and the value of the first colour component; calculating a difference between the value of the second colour component and the prediction value of the second colour component, and using the obtained difference as a residual of the encoding point; and performing Level of Detail (LOD) partitioning and lifting transform based on the residual of the encoding point.

Abstract: A prediction method, an encoder, a decoder, and a computer storage medium are provided. The prediction method applied to an encoder includes: determining a spatial block in which an encoding point is located; constructing a prediction model according to the spatial block; acquiring a value of a first colour component and a value of a second colour component of the encoding point; obtaining a prediction value of the second colour component of the encoding point by using the prediction model and the value of the first colour component; calculating a difference between the value of the second colour component and the prediction value of the second colour component, and using the obtained difference as a residual of the encoding point; and performing Level of Detail (LOD) partitioning and lifting transform based on the residual of the encoding point.

Abstract: Provided in the embodiments of the present application are a transform method, inverse transform method, encoder, decoder and storage medium.

Abstract: A system and method for performing mutual authentication verifies a username and a password of a handheld device by a server, and verifies an identity of the server by the handheld device if the handheld device passes the username and password verification. The system and method further verifies an identity of the handheld device by the server if the identity of the server is valid, and gives an access authority to the handheld device if the identity of the handheld device is valid.

Abstract: A system and method for performing mutual authentication verifies a username and a password of a handheld device by a server, and verifies an identity of the server by the handheld device if the handheld device passes the username and password verification. The system and method further verifies an identity of the handheld device by the server if the identity of the server is valid, and gives an access authority to the handheld device if the identity of the handheld device is valid.