50results about How to "Shorten data length" patented technology

In a remote control system, when a user directs a host device of a portable type toward target devices for search and specification, a search signal including a unique identifier (UID) is transmitted from a directional antenna. Each of the target devices stores the UID included in the received search signal in a memory unit, and transmits a response signal including device information on itself from an antenna. The host device identifies one of the target devices based on the device information included in the response signal, runs a control program for the identified target device, and displays an operation screen on a display unit. When the user instructs the remote operation on the operation screen, the host device transmits a remote control signal including the UID from the omni-directional antenna. When the target device receives the remote control signal including the UID that matches with the UID stored in the memory unit, the target device controls a function unit according to the remote control signal.

A visible light wireless communication receiver includes: a source code recognizing unit that receives a source bit stream and recognizes the source bit stream as source codes of a unit of a first number of bits; and a line coding unit that encodes each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number. In particular, in the encoding code, the number of bits corresponding to 1 is the same as the number of bits corresponding to 0. Therefore, the change in brightness of lighting may be minimized in the visible light wireless communication.

In a remote control device for a vehicle including: a portable transmitter configured to repeatedly transmit a signal for giving an instruction to activate an activation device mounted in a vehicle, in response to an operation of a manipulator which is performed continuously for a predetermined time or more; and a vehicle-side receiver provided in the vehicle to activate the activation device based on the signal transmitted from the portable transmitter, the portable transmitter transmits a first signal including a data frame having at least an ID code, a function code determining an action of the activation device, and a first error detection code and then repeatedly transmits a second signal, and a data frame of the second signal having same function code as that of the first signal and a second error detection code generated based on the function code, and the data frame of the first signal.

In addition to efficiently determining the antenna directivity between a transmitter and a receiver, the disclosed device, communication method and computer program efficiently feed back the determined results from the receiver to the transmitter. When transmission beam pattern order corresponding to various time slots in a signal for beam determination, or names representing the various transmission beam patterns are set communally through presetting or pre-negotiation between transmission and reception, the receiving side is able to predict reception power for each time slot based on shifts in the reception power of the beam determination signal, and also records and feeds back, in a notification signal, the transmission beam pattern name or time slot number that corresponds to the time slot realizing the maximum reception power.

A drive device capable of preventing a drop in the data transfer rate, even when write instructions from a host device are given with commands having a short write data length. If the write end address of one of a plurality of ATA commands issued by a host device 2 is consecutive with the write start address of the next ATA command, a command analysis unit 11 has data writing to an SD card 1 by the consecutive commands performed in a single process. As a result, overheads when writing data to SD cards are incurred only once, allowing the transfer rate to be improved.

A method and apparatus for improving the data readability in a disk drive is described. The disk drive uses an error recovery mode in which the rotational speed of the motor is decreased below the normal operating speed and a rereading is performed. The reduced speed lowers the energy generated in collisions with a foreign object and the data error length is shortened allowing data to be read which cannot be read at the normal operating speed.

The invention discloses a radio frequency identification two-way authentication method based on an ellipse curve and aims at mainly solving the problems of limited label storage resources, excessively-high calculation complexity and poor communication security of the existing RFID and a SQL interference module. The radio frequency identification two-way authentication method comprises the steps of (1), sending identity information to a label through a reader; (2), reading a session key kvz in per-stored data according to the identity of the reader through the label, encrypting relative authentication information by using the session key and sending an encryption result to the reader; (3), decrypting the relative authentication information by using a key value K through the reader and sending a random number and the session key to the label; (4), checking accuracy of the random number through the label after receiving information sent by the reader and sending an intermeddle value to the reader; and (5), finishing a final authentication process through the reader by using the intermeddle value. Through the method, the two-way authentication of the label and the reader is realized; calculation amount and occupied resources of the label are reduced; the communication safety is ensured; and the method is better applicable to an RFID (Radio Frequency Identification Device) system with limited resources.

The pulse generation circuit generates a first pulse signal and a complementary second pulse signal. The first and second pulse signals are activated simultaneously in a normal mode and activated selectively in response to a test input signal in a test mode. A multiplexing input circuit selects and outputs one of a data input signal and a test input signal as a latch input signal in response to the first pulse signal and the second pulse signal. The latch input signal corresponds to the data input signal in the normal mode and corresponds to the test input signal in the test mode. The latching circuit latches the latch input signal to generate data output signal. The length of data transfer path is reduced, and DtoQ delay can be decreased.

The invention discloses a satellite positioning data transmission method, which comprises the following steps that a mobile terminal acquires the longitude value and the dimension value of the mobile terminal through a satellite positioning module of the mobile terminal, the mobile terminal performs data compression on the longitude value and the dimension value respectively, and sends the compressed data to a monitoring terminal, and the monitoring terminal acquires the longitude value and the dimension value of the monitoring terminal through a satellite positioning module of the monitoring terminal, performs uncompressing on the received longitude value compressed data according to the longitude value of the monitoring terminal, and performs uncompressing on the received dimension value compressed data according to the dimension value of the monitoring terminal, so that the longitude value and the dimension value of the mobile terminal are obtained. The data length of satellite positioning data transmitted by the mobile terminal each time can be shortened, so that the data transmission time is reduced.

In a remote control system, when a user directs a host device of a portable type toward target devices for search and specification, a search signal including a unique identifier (UID) is transmitted from a directional antenna. Each of the target devices stores the UID included in the received search signal in a memory unit, and transmits a response signal including device information on itself from an antenna. The host device identifies one of the target devices based on the device information included in the response signal, runs a control program for the identified target device, and displays an operation screen on a display unit. When the user instructs the remote operation on the operation screen, the host device transmits a remote control signal including the UID from the omni-directional antenna. When the target device receives the remote control signal including the UID that matches with the UID stored in the memory unit, the target device controls a function unit according to the remote control signal.

An information-processing method performed in an information-processing apparatus, the information-processing apparatus performing wireless communication with a first apparatus and wire communication with a second apparatus, the information-processing method including the steps of:transmitting an interrupt signal to the second apparatus by using the wire communication when data is received from the first apparatus;receiving, by using the wire communication, a clock signal from the second apparatus which receives the interrupt signal; andtransmitting and receiving, by using the wire communication, data between the information-processing apparatus and the second apparatus.

A media subsystem of a processing element includes a plurality of elements and a latency manager. The plurality of elements are capable of processing media data including a plurality of instances wherein a first element inserts a length of media data into buffer(s) from which a second element thereafter reads the length of media data for subsequent output from the media subsystem. The latency manager is capable of determining a latency requirement of the media subsystem, and then dynamically tuning the length of media data inserted into the buffer(s) based upon the latency requirement, including increasing or decreasing the length of media data inserted into the buffer(s) during one or more instances(s).

The invention provides a power system frequency calculation method of windowing spectral line interpolation. The method includes the following steps that 1, voltage sampling data of ten continuous sampling cycles of a public connection point are obtained through a voltage measurement circuit; 2, time domain windowing function processing is conducted on the voltage sampling data; 3, local discrete Fourier transformation is conducted on the data obtained after windowing, and voltage amplitude values of specific harmonic wave times are obtained; 4, for the calculated specific voltage amplitude values, interpolation is conducted between the two adjacent maximal amplitude values; 5, calculation is conducted through a polynomial curve fitting method, a frequency coefficient is obtained, and thus fundamental wave frequency of a power grid is determined. By means of the method, a blackman window function is applied to N sampling points, local discrete Fourier transformation (DFT) is only conducted on designated harmonic frequency , it is proved through experiments that by means of the method, the spectrum leakage inhibition effect is good, the calculation speed is high, the calculation process is simple, precision is high, universality is high, and the method can be used for high-precision electric energy metering and electric energy quality analysis.

The embodiment of the invention relates to the technical field of communication, and discloses a packet loss rate calculation method, a server and a computer readable storage medium. In the invention,the packet loss rate calculation method is applied to a first agent end based on a forward error correction (FEC) protocol, and comprises the following steps: determining a maximum serial number, a minimum serial number and the number of received messages in FDP format messages received in a sampling period, wherein the message in the FDP format is sent by the second agent end and comprises a serial number field, and the serial number field comprises serial number information of the message; calculating a first packet loss rate according to the maximum serial number, the minimum serial number, the number of the messages and a preset constraint relationship among the maximum serial number, the minimum serial number, the number of the messages and the packet loss rate, wherein the first packet loss rate is the packet loss rate of the second agent end. In the embodiment of the invention, the packet loss rate can be calculated without sending the detection message, the calculation processof the packet loss rate is simplified, the detection message is prevented from occupying the bandwidth, and the flow consumption is reduced.

A servo-frame recording apparatus includes: a sector information rearranging section for rearranging serial bits of the sector information that is binary data; a first ExOR section for performing the ExOR (exclusive OR) on the sector information, the serial bits of which have been rearranged by said sector information rearranging section, and the track information, so that an exclusive logical sum is obtained; and a writing section for wiring the exclusive logical sum obtained by said ExOR section into the servo frame. With this configuration, a data length required for recording gray information and sector information can be shortened without lowering the reliability of a magnetic disk.

The pulse generation circuit generates a first pulse signal and a complementary second pulse signal. The first and second pulse signals are activated simultaneously in a normal mode and activated selectively in response to a test input signal in a test mode. A multiplexing input circuit selects and outputs one of a data input signal and a test input signal as a latch input signal in response to the first pulse signal and the second pulse signal. The latch input signal corresponds to the data input signal in the normal mode and corresponds to the test input signal in the test mode. The latching circuit latches the latch input signal to generate data output signal. The length of data transfer path is reduced, and DtoQ delay can be decreased.

A drive device capable of preventing a drop in the data transfer rate, even when write instructions from a host device are given with commands having a short write data length. If the write end address of one of a plurality of ATA commands issued by a host device 2 is consecutive with the write start address of the next ATA command, a command analysis unit 11 has data writing to an SD card 1 by the consecutive commands performed in a single process. As a result, overheads when writing data to SD cards are incurred only once, allowing the transfer rate to be improved.

[Problems] When two communication nodes communicate with each other they more reliably confirm that the communication party is a correct one.[Means for Solving Problems] Computation is performed on the basis of a first communication identifier created by a second communication node and contained in a first authentication message replied to the first communication node in response to a connection request message transmitted from the first to the second communication node, authenticator data held in the first communication node, and a second communication identifier created by the first communication node so as to create a message different from the other messages each time, creatable easily from the authenticator data, identifiable as a message created in response to the first authentication message, and not easy to derive or deduce authenticator data from this message. The second authentication message is checked.

A visible light wireless communication receiver includes: a source code recognizing unit that receives a source bit stream and recognizes the source bit stream as source codes of a unit of a first number of bits; and a line coding unit that encodes each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number. In particular, in the encoding code, the number of bits corresponding to 1 is the same as the number of bits corresponding to 0. Therefore, the change in brightness of lighting may be minimized in the visible light wireless communication.

The invention discloses a method for realizing integral frequency deviation estimation of a receiver. The method comprises the following steps of: compensating decimal frequency deviation of a time domain training sequence in a received signal; extracting the time domain training sequence of the received signal according to a set extraction interval; extracting a local training sequence according to the same set interval; transforming the time domain training sequence which is subjected to time extraction into a frequency domain training sequence through FFT (Fast Fourier Transform) according to data length after the time extraction; multiplying the frequency domain training sequence by the extracted shift local training sequence to obtain a frequency domain multiplication result; and transforming the frequency domain multiplication result back to a time domain through IFFT (Inverse Fast Fourier Transform). Each peak value is determined for different shift values; and the shift value corresponding to the maximum peak value is an estimated integral frequency deviation value. By adopting the method, integral frequency deviation estimation can be quickly and accurately realized, and operation and hardware realization complexity in a frequency deviation estimation algorithm can be effectively reduced.

A semiconductor memory device includes a memory cell array divided into a plurality of areas, a common data bus connected to an input / output circuit, a plurality of individual data buses connected to different areas of the memory cell array through different paths respectively, and a bidirectional buffer connected to the common data bus and the individual data buses. In the semiconductor memory device, the bidirectional buffers transmit data bidirectionally between the common data bus and a selected one of the individual data buses.

In a remote control device for a vehicle including: a portable transmitter configured to repeatedly transmit a signal for giving an instruction to activate an activation device mounted in a vehicle, in response to an operation of a manipulator which is performed continuously for a predetermined time or more; and a vehicle-side receiver provided in the vehicle to activate the activation device based on the signal transmitted from the portable transmitter, the portable transmitter transmits a first signal including a data frame having at least an ID code, a function code determining an action of the activation device, and a first error detection code and then repeatedly transmits a second signal, and a data frame of the second signal having the same function code as that of the first signal and a second error detection code generated based on the function code and the data frame of the first signal.

An information-processing method performed in an information-processing apparatus, the information-processing apparatus performing wireless communication with a first apparatus and wire communication with a second apparatus, the information-processing method including the steps of:transmitting an interrupt signal to the second apparatus by using the wire communication when data is received from the first apparatus;receiving, by using the wire communication, a clock signal from the second apparatus which receives the interrupt signal; andtransmitting and receiving, by using the wire communication, data between the information-processing apparatus and the second apparatus.

The invention discloses an adaptive data reduction method based on piecewise transient recognition, which comprises the following steps of: A, determining the number of segments and the length of eachsegment of reduced data according to the total data length and the reduced target length; b, establishing proportionality coefficients of a segmentation method and a transient method; c, according tothe proportionality coefficient, adopting a segmentation method for each segment of signals, and obtaining screened data and corresponding timestamps; d, according to the proportionality coefficient,adopting a transient method for each section of signal to obtain screened data and a corresponding timestamp, wherein the step D and C are not sequential; and E, integrating the data obtained by thesegmentation method and the transient method of each section of signal to obtain reduced data. According to the method, the trend information in the signal is extracted by adopting a segmentation method, the mutation information in the signal is extracted by adopting a transient method, and the data length is shortened on the basis that the information of the overall trend in the signal and the information of the key mutation signal are reserved by matching the two modes according to the proportionality coefficient.

The invention discloses a fractional order system identification method based on Legendre wavelet multi-resolution analysis. The method comprises the following steps that firstly, Legendre wavelet orders are selected in the interval of [0,1]; secondly, an operation matrix of Legendre wavelet integration is derived by utilizing a block pulse function integral matrix; the input signal and the outputsignal of the system are expanded in the form of Legendre wavelet; the wavelet multi-fraction analysis characteristic is utilized, output signals are continuously decomposed, high-frequency information is discarded, the data length is reduced, and finally, system parameters and orders are solved in a cyclic fractional order integral mode by adopting a least square method and taking an IAE index as a target function. According to the method, the problems that parameter estimation is slow and a noise pollution system cannot be identified due to single dimension, high order and multiple coefficients of a traditional Legendre wavelet integral operation matrix identification method are effectively solved, the system identification speed is increased, and the influence of noise on the identification precision is reduced.

A semiconductor memory device includes a memory cell array divided into a plurality of areas, a common data bus connected to an input / output circuit, a plurality of individual data buses connected to different areas of the memory cell array through different paths respectively, and a bidirectional buffer connected to the common data bus and the individual data buses. In the semiconductor memory device, the bidirectional buffers data transmitted bidirectionally between the common data bus and a selected one of the individual data buses.

The invention provides an order management method and device, an order query method and device, equipment and a medium. The method comprises the steps of establishing a plurality of sub-tables, numbering each sub-table wherein each sub-table corresponds to one sub-table number; acquiring a user number; determining a sub-table number corresponding to the user number; and storing all the order datacorresponding to the user numbers in the sub-tables corresponding to the sub-table numbers. By establishing a plurality of sub-tables, a single table with a large original data size can be convertedinto a plurality of sub-tables, so that the data length and the index length can be greatly reduced, the query speed can be greatly increased, the database performance can be improved, the order search efficiency and the system stability can be improved, and the order management efficiency can be improved.