Abstract: The present application relates to the technical field of audio device, and in particular discloses a speaker assembly, a microphone and a smart portable karaoke system. The speaker assembly includes an accommodating groove for storing a microphone. When the microphone is in the accommodating groove, the microphone has two states: a sunken state, in which the microphone is configured to slide downwards with respect to the accommodating groove and is locked in the accommodating groove when being pushed for the first time; and a lifted state, in which the microphone is released and is configured to slide upwards with respect to the accommodating groove when being pushed again. The speaker assembly provided by the present application can effectively solve the problem that the microphone is inconvenient to carry and accommodate.

Abstract: Systems, methods, and instrumentalities are disclosed for performing planar horizontal mode, planar vertical mode, and/or planar directional mode intra-prediction. Planar intra-prediction modes may be used in video coding for coding blocks. Directionality of planar intra-prediction modes may be used to determine a reference region and/or template. For example, a cross-component linear model (CCLM) or a multi-model linear model mode may be determined based on the direction of the planar mode. A reference region of chroma decoder-side intra mode derivation (DIMD) or convolutional cross-component model (CCCM) for a chroma block may be determined based on a planar mode associated with a collocated luma block. For example, a reference region or template for template-based intra mode derivation (TIMD) or spatial geometric partitioning mode (SGPM) may be determined based on the direction of the planar mode.

Abstract: Systems, devices, and methods are described herein for extending the types of candidate modes that may be included in spatial geometric prediction mode (SGPM) candidate lists. An example device for video decoding may determine that SGPM is used for a current block. The device may derive an intra-prediction candidate based on a template of the current block. The device may generate an SGPM candidate list for the current block based on the intra-prediction candidate. The device may decode the current block based on the SGPM candidate list. The device may derive an intra block copy merge candidate for the current block and add the intra block copy merge candidate to the SGPM candidate list. The device may derive an inter merge candidate for the current block and add the inter merge candidate to the SGPM candidate list.

Abstract: Systems, devices, and methods are described herein for local illumination compensation (LIC) with extended models. An example device for video decoding may determine an LIC model for a block; obtain a set of LIC parameters based on the determined LIC model for the block; and decode the block based on the set of LIC parameters. An example device for video encoding may select a LIC model, from a plurality of LIC models, for block; obtain a set of LIC parameters based on the selected LIC model for the block; and encode the block based on the set of LIC parameters.

Abstract: A video device may employ bi-directional prediction in Geometric Partition Mode (GPM). A video device, which may be a video encoding and/or video decoding device, may determine, for a coding block, a first geometric partitioning mode (GPM) partition and a second GPM partition. The video device may obtain, for the coding block, a motion information merge candidate list comprising at least one bi-prediction motion information. The video device may determine, for the first GPM partition, first bi-predicted motion information, based on the motion information merge candidate list, and may predict the first GPM partition based on the first bi-prediction motion information. The video device may determine, for the second GPM partition, second bi-predicted motion information, based on the motion information merge candidate list, and may predict the second GPM partition based on the second bi-predicted motion information.

Abstract: Apparatuses and methods are presented for encoding and decoding video data. Techniques disclosed provide for the coding of a video block into a bitstream, including down-sampling a transform block and transforming the down-sampled transform block to generate a coefficient block to be coded into the bitstream. Techniques disclosed also provide for decoding a video block from the bitstream, including inverse transforming a coefficient block to reconstruct a down-sampled transform block, and up-sampling the down-sampled transform block, reconstructing therefrom a transform block.

Abstract: Disclosed herein are systems, methods, and instrumentalities associated with transform coding. Candidate transforms for a video block may be ordered by a video encoder based on respective hypothetical costs associated with processing the video block based on the candidate transforms. A transform index value indicating the position of a suitable transform on the ordered transform list may then be signaled to a video decoder, which may perform similar cost-based sorting operations to derive the ordered transform list and select a transform for the video block from the ordered transform list based on the signaled index.

Abstract: In at least one embodiment, a method and apparatus for encoding/decoding a video is based on a CABAC coding of bins where a high-level constraint on the maximum usage of regular CABAC coding of bins is enforced. In other words, a budget of regular coded bins is allocated over a picture area that is larger than a coding group, thus covering a plurality of coding groups, and which is determined from an average allowed number of regular bins per unit of area.

Abstract: Apparatuses and methods are disclosed for encoding and decoding data, including video blocks. Techniques disclosed include adapting a decoder-side motion vector refinement (DMVR) process to coding tools with an illumination change. For a video block being encoded or decoded, the DMVR process includes determining that at least one coding tool, of the coding tools with the illumination change, is enabled; and performing the DMVR process, where a distortion metric is selected based on the enabled coding tool.

Abstract: Systems, methods, and instrumentalities are disclosed for performing video coding using residual coefficient sign prediction with an adaptive cost function for intra prediction modes. An adaptive cost function for intra prediction modes (IPMs) may include multiple (e.g., selectable) cost functions, such as a default or standard cost function, a horizontal cost function, a vertical cost function, a diagonal up-right cost function, a diagonal down-right cost function, and/or a diagonal down-left cost function. A cost function may be selected based on one or more rules, which may be based on an IPM and a corresponding IPM index. An adaptive cost function for IPMs may include a cost function for multiple (e.g., all) directions. A cost function for multiple directions may include weighting factors related to an IPM and corresponding IPM index. A weighting parameter between the top and the left border continuity cost may be deduced from the IPM index.

Abstract: An encoding method is disclosed. At least one context is first determined for encoding a syntax element associated with a block of a picture responsive to a current quantization parameter associated with the block. Second, the syntax element is context-based entropy encoded with the at least one determined context.

Abstract: A video codec can involve processing video information based on a motion model involving a coding unit including a plurality of sub-blocks, such as an affine motion model, to produce motion compensation information, obtaining a local illumination compensation model, and encoding or decoding the video information based on the motion compensation information and the local illumination compensation model.

Abstract: To encode with CABAC, a non-binary syntax element value is mapped to a binary sequence (bin string), through a binarization process. A binary arithmetic coding engine encodes or decodes a bin, in a regular (context-based) mode and a bypass mode.

Abstract: Systems, methods, and instrumentalities are disclosed for most probable mode (MPM) list generation with template-based intra mode derivation (TIMD). An example method involves determining an intra coding mode derivation process is enabled for a first coding block; based on the intra coding mode derivation process being enabled for the first coding block, generating a first MPM list for the first coding block based on a first MPM list generation process; decoding the first coding block based on the first MPM list; determining that the intra coding mode derivation process is disabled for a second coding block; based on the intra coding mode derivation process being disabled for the second coding block, generating a second MPM list for the second coding block based on a second MPM list generation process, different from the first MPM list generation process; and decoding the second coding block based on the second MPM list.

Abstract: Encoding or decoding syntax information associated with video information can involve identifying a coding context associated with a syntax element of a current coding unit of the video information, wherein the identifying occurs without using a syntax element of a neighboring block, and encoding or decoding the syntax element of the current coding unit based on the coding context.

Abstract: A Local illumination compensation system for video encoding and decoding uses memory for storing illumination compensation parameters and does not require access to reconstructed pixels of neighboring blocks. A set of illumination compensation parameters is stored in a dedicated buffer, which is of limited size, and which is decoupled from the coding unit level storage of information. The buffer contains a set of illumination compensation parameters, which may be, for example, computed (or determined in some other manner) on the fly or determined beforehand (for example for example obtained from the video signal or from a device).

Abstract: Encoding or decoding syntax information associated with video information can involve identifying a coding context associated with a syntax element of a current coding unit of the video information, wherein the identifying occurs without using a syntax element of a neighboring block, and encoding or decoding the syntax element of the current coding unit based on the coding context.

Abstract: Embodiments disclosed herein generally relate to methods and apparatuses for video coding. For example, methods and apparatuses using decoder-side motion vector refinement (DMVR) technique with bi-prediction weighting for video coding are provided. In an example, a method for video coding includes determining a mode with an illumination change, determining that at least one coding tool for a block is enabled, and performing a DMVR process based on the mode with the illumination change and the at least one coding tool for the block being enabled.

Abstract: When dependent scalar quantization is used, the choice of the quantizer depends on the decoding of the preceding transform coefficient, and the entropy decoding of a transform coefficient depends on quantizer choice. To maintain high throughput in hardware implementations for transform coefficient entropy coding, several decision schemes of the scaler quantizer are proposed. In one implementation, the state transition and the context model selection are based on only regular coded bins. For example, the state transition can be based on the sum of the SIG, gt1 and gt2 flags, the exclusive-or function of the SIG, gt1 and gt2 flags, or based on only the gt1 or gt2 flag. When a block of transform coefficients is coded, the regular mode bins can be coded first in one or more scan passes, and the remaining bypass coded bins are grouped together in another one or more scan passes.

Abstract: The present disclosure discloses a rare earth permanent magnet, its preparation method and motors. The rare earth permanent magnet comprises a light rare earth element and a heavy rare earth element. The light rare earth element must contain Nd and the heavy rare earth element must contain Dy and Tb; along the width direction, the rare earth permanent magnet has two edge portions and one middle portion; along the direction from the outer edge of the edge portion towards the central axis of the middle portion, the weight percentage of Dy gradually increases, while the weight percentage of Tb gradually decreases; the average coercive force of the edge portion is more than that of the middle portion. The rare earth permanent magnet of the present disclosure has a good anti-demagnetization performance.