Encoder, encoding method, decoder, and decoding method

    公开(公告)号:US11375207B2

    公开(公告)日:2022-06-28

    申请号:US17188448

    申请日:2021-03-01

    Abstract: An encoder which encodes a current block of a picture includes a processor and memory. Using the memory, the processor: determines whether intra prediction is to be used for the current block; and when it is determined that intra prediction is to be used for the current block, generates first transform coefficients by performing first transform of residual signals of the current block using a first transform basis; quantizes the first transform coefficients when an intra prediction mode for the current block is a determined mode and the first transform basis is different from a determined transform basis; and generates second transform coefficients by performing second transform of the first transform coefficients using a second transform basis, and quantizes the second transform coefficients, when the intra prediction mode for the current block is not the determined mode or when the first transform basis matches the determined transform basis.

    TRANSMISSION DEVICE, RECEPTION DEVICE, TRANSMISSION METHOD, AND RECEPTION METHOD

    公开(公告)号:US20220191947A1

    公开(公告)日:2022-06-16

    申请号:US17593671

    申请日:2020-03-24

    Abstract: The present invention provides a transmission device, a reception device, a transmission method, and a reception method that implement an appropriate random access procedure in accordance with a propagation delay between a terminal and a base station. A terminal (100) is provided with a wireless transmission unit (103) which transmits a random access channel signal, and a control unit (107) which sets, from among a plurality of preamble sequence candidates, a preamble sequence for use in the random access channel signal. At least one of the plurality of preamble sequence candidates is composed of two or more mutually different code sequences.

    INTRUSION PATH ANALYSIS DEVICE AND INTRUSION PATH ANALYSIS METHOD

    公开(公告)号:US20220182404A1

    公开(公告)日:2022-06-09

    申请号:US17665218

    申请日:2022-02-04

    Abstract: The control network system is connected to electronic control unit(s) and a communication device, and includes security sensor(s) that transmits a security alert indicating that an indication of a security breach is detected to the network, if the indication is detected in at least one of the network, the electronic control unit(s), or the communication device. The intrusion path analysis device includes: an alert obtainer that obtains the security alert from the security sensor(s); an event obtainer that obtains an event history of an event that occurs in the control network system; and an intrusion path analyzer that performs an analysis on an intrusion path of an attack on the basis of the security alert, the event history, and an intrusion depth indicating an intrusion level to be assumed in a case the security alert occurs, and that outputs a result of the analysis.

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