Abstract: A three-dimensional data encoding method includes: calculating difference values each of which is a difference between (i) a corresponding one of pieces of attribute information of three-dimensional points included in point cloud data and (ii) a predicted value corresponding to the corresponding attribute information; generating a second code sequence including first information and a second information, the first information indicating a total number of zero difference values consecutive in a first code sequence in which the difference values are arranged, the second information indicating a value of a non-zero difference value included in the difference values, the zero difference values being included in the difference values and having a value of 0; and generating a bitstream including the second code sequence.

Abstract: A video transmitting method according to embodiments may comprise the steps of: removing inter-view redundancy of pictures with respect to a plurality of viewing positions; packing the pictures in which the inter-view redundancy is removed; and encoding the packed pictures and signaling information. A video receiving method according to embodiments may comprise the steps of: decoding a bitstream of a video, on the basis of a viewing position and viewport information; unpacking pictures and signaling information in the decoded bitstream; view regenerating the unpacked pictures; and view synthesizing the view-regenerated pictures.

Abstract: In a sample observation device, when the angle formed by an optical axis of an emission optical system and a normal of a scanning surface is ?1 and the angle formed by an optical axis of an imaging optical system and the normal of the scanning surface is ?2, both ?1 and ?2 are 80° or less, and ?1+?2 is 100° or more. In an image acquisition unit, an image acquisition region Fn+1, m+1 in the (m+1)-th frame of the (n+1)-th pixel is shifted from an image acquisition region Fn, m in the m-th frame of the n-th pixel in a scanning direction of a sample according to the scanning amount of the sample in the exposure time of one frame.

Abstract: A medium dynamic range video signal and associated metadata are received, wherein the metadata include data representative of a peak luminance value of the signal. The medium dynamic range video signal is processed in a first mode to reconstruct a high dynamic range video signal based on a received standard dynamic range video signal and associated metadata if the peak luminance value of the medium dynamic range video signal is smaller than the peak luminance value of a presentation display, and in a second mode to optimize a received high dynamic range video signal for a rendering device if the peak luminance value of the medium dynamic range video signal is greater than the peak luminance value of the presentation display.

Abstract: Methods, systems, and devices for ranging are described. A multi-phase distributed ranging technique includes transmitting and receiving vehicle information messages during a first time interval, where the vehicle information messages include at least a vehicle identifier and resource information. The multi-phase technique further includes transmitting and receiving ranging signals during a second time interval, and determining times of arrival of received ranging signals. A centralized ranging technique includes receiving resource assignments from an access point, transmitting ranging signals according to the resource assignments, and determining times of arrival of received ranging signals.

Abstract: Aspects of the disclosure provide a method and an apparatus including processing circuitry for video decoding. The processing circuitry can decode, from a coded video bitstream, a first syntax element signaled at a first coding level. The first syntax element can indicate a maximum number of merge motion vector prediction (MVP) candidates. The first coding level can be higher than a picture parameter set (PPS) level. The processing circuitry can determine the maximum number of merge MVP candidates based on the first syntax element. The processing circuitry can reconstruct coding blocks associated with the first coding level based at least on the maximum number of merge MVP candidates. The first coding level can be a sequence level and the first syntax element can be signaled in a sequence parameter set (SPS).

Abstract: A watchtower vehicle, including: a top plate engaged with a top of a vehicle; an extendable boom, with a first end thereof engaged with the top plate, wherein the extendable boom is allowed to be inclined from a vertical axis of the top plate within a first angle range; a main sensor mounting unit, engaged with a second end of the extendable boom, for mounting at least one sensor thereon, wherein the main sensor mounting unit is allowed to be inclined from a longitudinal axis of the extendable boom within a second angle range; a sensor module unit including the sensor mounted on the main sensor mounting unit; and a control module for controlling or supporting another module to control at least one of the extendable boom within the first angle range and the main sensor mounting unit within the second angle range.

Abstract: A data processing method and a non-transitory computer storage medium are disclosed. The data processing method is applied in a terminal and includes: dynamically determining a current coding-mapping relationship of pixel coding; sending the current coding-mapping relationship or indication information of the current coding-mapping relationship to a mobile edge computing MEC server; performing pixel coding on pixel values of three-dimensional video data based on the current coding-mapping relationship and obtaining pixel-coded data; and sending the pixel-coded data to the mobile edge computing MEC server. The pixel-coded data are configured to restore the three-dimensional video data by the MEC server. A data volume of the three-dimensional video data before pixel coding may be a first data volume. A data volume of the three-dimensional video data after pixel coding may be a second data volume. The first data volume may be greater than the second data volume.

Abstract: A transmission apparatus includes circuitry configured to perform high dynamic range (HDR) opto-electronic conversion on HDR video data to obtain HDR transmission video data. An encoder receives input of at least the HDR transmission video data and output a video stream including coded video data, and a transmitter sends the video stream. The circuitry is further configured to insert HDR conversion characteristic meta-information into the video stream, the HDR conversion characteristic meta-information indicating a characteristic of the HDR conversion.

Abstract: A method of video decoding performed in a video decoder is disclosed. A syntax element can be received from a bitstream of a coded video that indicates whether a sequence of pictures are monochrome or include three color components that are coded separately. By inferring a value of a syntax element, a coding tool can be disabled when the syntax element indicates that the sequence of pictures are monochrome or include three color components that are coded separately. The coding tool uses multiple color components of a picture as input or depends on a chroma component of a picture. Examples of the disabled coding tools can include joint coding of chroma residuals, active color transform (ACT), or block-based delta pulse code modulation (BDPCM) for chroma component.

Abstract: Provided is a video decoding method including obtaining encoding order information indicating whether an encoding order of a first block and a second block that are adjacent to each other is changed; determining the encoding order of the first block and the second block, based on the encoding order information; and decoding the first block and the second block, according to the determined encoding order.

Abstract: A system and methods for a CODEC driving a real-time light field display for multi-dimensional video streaming, interactive gaming and other light field display applications is provided applying a layered scene decomposition strategy. Multi-dimensional scene data including information on transparency of surfaces is divided into a plurality of data layers of increasing depths as the distance between a given layer and the display surface increases. Data layers are sampled using a plenoptic sampling scheme and rendered using hybrid rendering, such as perspective and oblique rendering, to encode light fields corresponding to each data layer. The resulting compressed, (layered) core representation of the multi-dimensional scene data is produced at predictable rates, reconstructed and merged at the light field display in real-time by applying view synthesis protocols, including edge adaptive interpolation, to reconstruct pixel arrays in stages (e.g. columns then rows) from reference elemental images.

Abstract: A multimedia file and methods of generating, distributing and using the multimedia file are described. Multimedia files in accordance with embodiments of the present invention can contain multiple video tracks, multiple audio tracks, multiple subtitle tracks, a complete index that can be used to locate each data chunk in each of these tracks and an abridged index that can enable the location of a subset of the data chunks in each track, data that can be used to generate a menu interface to access the contents of the file and ‘meta data’ concerning the contents of the file. Multimedia files in accordance with several embodiments of the present invention also include references to video tracks, audio tracks, subtitle tracks and ‘meta data’ external to the file.

Abstract: A server includes a server controller, a server communication unit, and a server storage unit, and is adapted to be connected to a communication terminal via the server communication unit. The server controller stores a video taken by a vehicle during traveling, in the server storage unit, such that the video is associated with a road on which the vehicle is traveling, determines a scheduled traveling route, in response to a request from the communication terminal, obtains the video corresponding to each of one or more roads that constitute the scheduled traveling route, from the server storage unit, and sends the video to the communication terminal, on which the video is displayed.

Abstract: A method for performing transform skip mode (TSM) in a video decoder is provided. A video decoder receives data from a bitstream to be decoded as a plurality of video pictures. The video decoder parses the bitstream for a first syntax element in a sequence parameter set (SPS) of a current sequence of video pictures. When the first syntax element indicates that transform skip mode is allowed for the current sequence of video pictures and when transform skip mode is used for a current block in a current picture of the current sequence, the video decoder reconstructs the current block by using quantized residual signals that are not transformed.

Abstract: An example method includes decoding a plurality of filter coefficients of a cross-component adaptive loop filter, wherein decoding a particular filter coefficient of the plurality of filter coefficients comprises: decoding, from an encoded video bitstream, a syntax element specifying an exponent value that represents a log base 2 of an absolute value of the particular filter coefficient as two raised to the power of the exponent value; and determining a value of the particular filter coefficient based on the exponent value; reconstructing samples of a block of video data; and cross-component adaptive loop filtering, based on the plurality of filter coefficients, the block of video data.

Abstract: A picture decoding method performed by a decoding device according to an embodiment of the present disclosure comprises the steps of: deriving a context index for a split flag syntax element on the basis of split availability information of a current block; determining a context model on the basis of the derived context index; decoding a value of the split flag syntax element on the basis of a CABAC, using the determined context model; deriving a current coding unit from the current block on the basis of the value of the split flag syntax element; deriving a predicted block on the basis of inter prediction or intra prediction for the current coding unit; and generating a reconstructed block on the basis of the predicted block.

Abstract: A new hash Supplemental Enhancement Information (SEI) message for the V3C/V-PCC atlas frame is described herein. The message is used to signal the hash values that are computed for the syntax elements associated with each patch. The hash SEI message is able to be used for the V3C/V-PCC tile level and optionally for atlas level conformance testing. The hash is able to be used to confirm that the decoded values by the decoder are the same as the original values that were encoded by the encoder.

Abstract: A deep-sea imaging and control system with an extremely compact remote camera head unit which can operate to depths of at least 5500 m (about 8500 psi). The unit has a photopolymer shell for a pressure housing that can be 3D-printed, at least partially filled with high performance epoxy used as a potting compound. A pressure resistant optically transparent material such as a flat polished borosilicate glass disc serves as the optical viewport and protects the unpotted lens assembly from pressure and water intrusion. The control computer can be separate from the camera, is partially or completely potted in epoxy, and can be accessible through a Wi-Fi connection.

Abstract: A video processing method includes a step of receiving a bitstream, and a step of decoding a part of the bitstream to generate a decoded frame, including parsing a plurality of syntax elements from the bitstream. The decoded frame is a projection-based frame that includes a plurality of projection faces packed at a plurality of face positions with different position indexes in a hemisphere cubemap projection layout. A portion of a 360-degree content of a sphere is mapped to the plurality of projection faces via hemisphere cubemap projection. Values of the plurality of syntax elements are indicative of face indexes of the plurality of projection faces packed at the plurality of face positions, respectively, and are constrained to meet a requirement of bitstream conformance.