Abstract:
Embodiments of this application provide a data transmission method and apparatus. A method at a transmit end includes: obtaining a first sequence, where the first sequence includes a first sub-sequence and a second sub-sequence; mapping the first sub-sequence into K third sub-sequences based on a preset sequence group; performing differential coding and phase modulation on the second sub-sequence to obtain a fourth sequence whose length is K′; obtaining K fifth sub-sequences based on the K third sub-sequences and the K′ fourth sub-sequences; and outputting a second sequence including the K fifth sub-sequences. A method at a receive end includes: obtaining a second sequence including K fifth sub-sequences, and detecting the K fifth sub-sequences based on a preset sequence group to obtain a first sub-sequence; and performing differential demodulation based on the first sub-sequence to obtain a second sub-sequence, so that a first sequence is determined.
Abstract:
A method for a server to access a shingled magnetic recording (SMR) disk includes: receiving, by the server, a data operation request, where the data operation request includes address information of target data; determining, according to the address information, a target storage zone in the SMR disk and that corresponds to the target data; determining that there is write pointer information of the target storage zone in a cache, and obtaining the write pointer information from the cache, where the write pointer information is address information of latest stored data in the target storage zone; generating a data operation instruction according to the write pointer information and the address information of the target data, where the data operation instruction is used to perform an operation on the target data; and sending the data operation instruction to the SMR disk.
Abstract:
A data modulation method includes dividing, by a terminal device, to-be-sent data into N bit groups, wherein N≥2 and N is an integer. The method also includes generating, by the terminal device, N complex symbol groups. An ith complex symbol group is obtained by processing an ith bit group based on a mapping rule corresponding to the ith bit group. The mapping rule corresponding to the ith bit group is determined based on at least a group identity of the ith bit group and a first parameter. The first parameter includes at least one of a pilot parameter, a hopping identity, a terminal device identity, a layer index of a non-orthogonal layer, or a hopping offset. The N bit groups correspond to at least two different mapping rules, 0≤i≤N−1, and i is an integer. The method further includes sending, by the terminal device, the N complex symbol groups.
Abstract:
A method for processing image data includes obtaining at least two captured images, where focal points of the obtained captured images are different; obtaining a focus-capture parameter, and fusing the captured images according to the focus-capture parameter to obtain a fused image; and performing joint coding on the fused image, and outputting an image; where when registration, mapping, cutting, and fusion are performed on the captured images according to the focus-capture parameter, a mask image is corrected through analysis of motion information of the captured images, and images are selected; and the corrected mask image includes a sequence number of a captured image selected at each pixel in the connected motion object region after the captured images are marked with sequence numbers. The method is used to implement high-efficiency and high-quality image processing.
Abstract:
The present patent application provides a method, an apparatus, and a system for collaborative communication between a network device and two or more terminal devices. The network device receives a collaboration request from a first terminal device. The network device determines, according to the collaboration request, at least one second terminal device that may collaborate with the first terminal device in receiving downlink data. The network device sends an indication message to the first terminal device. The indication message instructs the first terminal device to receive a first part of the downlink data from the network device, and receive a second part of the downlink data, which is transmitted from the network device to the second terminal device, from the second terminal device.
Abstract:
A data transmission method and apparatus are disclosed. The method includes a first communication apparatus obtains information bit information of an ith sub-block, where the information bit information of the ith sub-block includes information bits of the ith sub-block and an information bit length of the ith sub-block, and i is a positive integer; obtains a matrix order M of the RM corresponding to the first communication apparatus in the ith sub-block, where M is a positive integer; then obtains, based on M, a first P matrix and a first b vector that are used to generate an RM; then generates, based on the first P matrix and the first b vector, the RM sequence corresponding to the ith sub-block; and finally, outputs the RM sequence corresponding to the ith sub-block.
Abstract:
In a data backup method performed in a storage system having multiple storage devices, a first storage device having a first LUN queries data consistency points from a second storage device that has a second LUN which has an active-active relationship with the first LUN. The second storage device obtains the data consistency points based on the IO data status record of the first LUN and an IO data status record of the second LUN stored in the second storage device, and provides the data consistency points to the first storage device. The first storage device then creates a snapshot for the first LUN based on the data consistency points, provides differential data between the current snapshot and a previous snapshot, and stores the differential data in the backup storage device.
Abstract:
The present disclosure discloses a sound signal processing method and apparatus, and a computer-readable storage medium, and belongs to the field of audio processing technologies. A device first obtains first spatial location information of sound pickup space and second spatial location information of a plurality of microphones deployed non-linearly, and then determines, based on first sound signals respectively received by the plurality of microphones and the second spatial location information, a spatial location of a first sound source that emits the first sound signals. If the first sound source is located in the sound pickup space, the device performs enhancement processing on the sound signals emitted by the first sound source. In the present disclosure, sound sources in different space are distinguished, so that only a sound signal emitted by a sound source located in the sound pickup space is enhanced.
Abstract:
Embodiments of this disclosure relate to the communications field, and provide a repeated transmission method and an apparatus, to increase a probability of successful decoding of a user equipment. The method includes: performing, by a user equipment, first transmission of uplink data, and sending a first reference signal to a network device based on a first transmit power, where the first reference signal is used to demodulate the first transmission of the uplink data; and performing, by the user equipment, Nth transmission of the uplink data, and sending a second reference signal to the network device based on a second transmit power, where N is an integer greater than or equal to 2, the second reference signal is used to demodulate the Nth transmission of the uplink data, and the second transmit power is less than the first transmit power.
Abstract:
A video frame fade-in/fade-out detection method is provided, the detection method includes: before motion search, performing inter-frame comparison on block direct current components in some rows of a picture or performing inter-frame comparison on block direct current components in a partial area of a picture; collecting statistics on an inter-frame comparison result; determining whether fade-in/fade-out exists, to choose whether prediction is in a weighted mode; and if it is detected, by means of inter-frame comparison on block direct current components on some rows, that no global fade-in/fade-out exists, selecting a partial area within a range of some detected rows to perform inter-frame comparison on block direct current components again, and detecting local fade-in/fade-out. In the present invention, fade-in/fade-out is detected under the premise that easy hardware implementation is ensured, which saves a bandwidth and improves block match accuracy; in addition, the present invention proposes a solution for local fade-in/fade-out.