105 results about "Error correction mode" patented technology

A digital television (DTV) receiving system includes a tuner, a demodulator, a known data detector, an equalizer, a transmission detector, and a block decoder. The tuner receives a DTV signal having a data frame in which main and mobile service data are multiplexed. The demodulator demodulates the DTV signal, and the known data detector detects known data included in the mobile service data. The equalizer equalizes the demodulated DTV signal using the detected known data, and the transmission parameter detector detects an error correction mode from the equalized DTV signal. Finally, the block decoder decodes the equalized DTV signal for error correction using the detected error correction mode.

A method and apparatus for time and frequency domain forward error correction (FEC) in a modem which communicates data using multiple discrete sub-channels is provided. The invention may be implemented in hardware, software or firmware. In an embodiment of the invention a modem with a plurality of components forming a transmit path and a receive path is disclosed. The modem communicates data across a wired or wireless communication medium using a multiplicity of discrete sub-channels. The modem includes a transform component and a time domain FEC component. The transform component transforms the multiplicity of discrete sub-channels of a communication between a time domain and a frequency domain on the receive path and vice-versa on the transmit path. The time domain FEC component couples to the transform component. The time domain FEC component has a complementary encoder and decoder portion on the transmit and receive paths respectively. The encoder and decoder portions encode and decode respectively the multiplicity of discrete sub-channels in the time domain.

An ECC circuit can operate in a plurality of error correction modes with different correcting capabilities for data stored in a memory. The ECC circuit calculates a syndrome with respect to information data in accordance with an error correction mode set by a control part and adds a syndrome of a fixed length in which dummy bits are added to the calculated syndrome, to the information data. When code data is read out, the ECC circuit performs a correction process on the code data by using the syndrome included in the code data.

A digital television (DTV) receiving system includes a tuner, a demodulator, a known data detector, an equalizer, a transmission detector, and a block decoder. The tuner receives a DTV signal having a data frame in which main and mobile service data are multiplexed. The demodulator demodulates the DTV signal, and the known data detector detects known data included in the mobile service data. The equalizer equalizes the demodulated DTV signal using the detected known data, and the transmission parameter detector detects an error correction mode from the equalized DTV signal. Finally, the block decoder decodes the equalized DTV signal for error correction using the detected error correction mode.

The invention provides a voice error correction method and device. The voice error correction method comprises that voice data of a user is received; a preset error correction mode which includes a semantic error correction mode or an index error correction mode is determined; according to the voice data of the user and the present error correction mode, an error of a content to be corrected is corrected; and the content after error correction is back fed to the user. The method can improve the accuracy and suitable range of error correction, requirements of the user can be met more effectively, and user experience is improved.

The invention discloses a Chinese error correction method and a device, a storage medium and an electronic device. The method comprises the steps of obtaining candidate words from a candidate word list according to target words in a to-be-corrected statement, and replacing the target words in the to-be-corrected statement with the candidate words; calculating a first confusion index PPL value of the to-be-corrected statement before replacement and a second confusion index PPL value of the text in the to-be-corrected short sentence after replacement; under the condition that the difference value between the first PPL value and the second PPL value is smaller than a first threshold value, obtaining the position of a suspected wrongly written character in the statement to be corrected; replacing the characters marked with the suspected wrongly written character positions with prediction characters, and calculating the probability of the prediction characters in the target statement; and under the condition that the probability is greater than a second threshold, replacing the suspected wrongly written character with the prediction character. The technical problems that in the prior art, the error correction mode of statements is single, and error correction cannot be rapidly and effectively achieved are solved.

The invention discloses data transmission method and device based on gradable bit streams. The data transmission method comprises the following steps of: dividing reinforcement layer data into a plurality of grades according to the significance for reconstructing an image; adopting error correction modes with different redundancy rates for the data of different grades, wherein the higher the significance for reconstructing the image is, the higher the redundancy rate of the error correction mode adopted by a grade; and carrying out error correction coding for base layer data, wherein the redundancy rate of the error correction coding is at least equal to that of the error correction coding of a grade with the highest significance. Compared with the traditional transmission method adopting equal error protection or unequal data protection, the invention can enhance the channel disturbance resistant capacity under the precondition of indistinctly increasing the redundancy rate and achieve higher transmission reliability.

A multi-tone modem supporting multi-tone modulation protocols over multiple bundled transmission lines. The multi-tone modem is configured to transmit and receive communication channels each associated with a corresponding one of a plurality of transmission lines. The modem comprises at least one in-channel forward error correction component and a cross-channel forward error correction component. The at least one in-channel forward error correction component discretely encodes and decodes data from each communication channels transmitted and received over the plurality of transmission lines. The cross-channel forward error correction component encodes data from all communication channels and buffers the corresponding cross-channel redundancy symbols of each cross-channel codeword.

An error detection and correction system for the data storage of a miniature satellite onboard spacecraft computer belongs to the technical field of the computer storage in a miniature satellite in the space technology. The system is characterized in that the system comprises a static memory storage unit assembly and a field programmable device FPGA, wherein the FPGA comprises a Hamming error correcting circuit, a triple modular redundancy decision circuit, two both-way tristate gates, an address logic circuit and a mode control circuit; according to the address contents of an external central processing unit, the mode control circuit selects any of the three modes of Hamming error correction, triple modular redundancy decision and error-free control; and according to the storage space configured by the address logic circuit controlled by the mode control circuit, the storage unit assembly consisting of 12 static memory storage units carries out the read-write operation of the data signal inputted by the central processing unit through the two both-way tristate gates. As the system respectively separates the memory space of the memory storage unit assembly into flexible and adjustable groups according to the three modes, the memory can be flexibly distributed according to the error correcting modes so as to be fully utilized.

A semiconductor device able to improve data retaining characteristics and decrease power consumption, further able to realize more unrestricted system without increasing excessive circuits, and having the following: an ALPG receiving a start signal and a mode selection signal to generate commands and addresses with respect to a DRAM circuit with the predetermined patterns in accordance with modes, and outputting an ending signal when ending a pattern generating processing in each of modes; an ECC circuit receiving a start signal and a mode selection signal indicating a parity generation mode to generate a parity based on data read from the DRAM circuit, receiving the start signal and a mode selection signal indicating an error correction mode to perform an error correction with respect to data read from the DRAM circuit based on the parity generated in the parity generation mode and outputting data after correcting; and an interface circuit.

The invention relates to an error correcting method of a navigation system. The method receives GPS positioning information under a navigation error-correcting mode by starting the mode, judges whether a navigation object deviates from a planned path, if so, acquiring a standby channel in a first distance of the navigation object and displaying the standby channel provided for a user for selection. After adopting the technical proposal, the navigation system also can provide the chance of correcting the current positioning channel when the distance between the channels is shorter; therefore, compared with the existing navigation system of which the current positioning path can not correct errors, the invention reduces the possibility of traffic accident occurrence and improves the navigation information accuracy of the navigation system.

The invention discloses a data transmission method and system based on multi-frequency sound wave. The data transmission method comprises the following steps: calculating an error detection code and an error correction code of transmitted data, and adding the error detection code and the error correction code in the transmitted data; converting the transmitted data onto corresponding sound wave frequency to generate continuous audio information and play the continuous audio information, wherein each syllable of the audio information contains one or more frequency signals; when the audio information is received, analyzing the frequency signal from the audio information, and obtaining the transmitted data from the frequency signal. According to the data transmission method based on multi-frequency sound wave disclosed by the invention, the same syllable contains multiple kinds of frequency, so the encodable information of each syllable is increased and the code rate is improved, continuous errors are dispersed in an interlacing manner to improve the error correction ability and the anti-interference ability, two error detection modes and two error correction modes are used in a mixing manner to improve the error correction ability and the anti-interference ability, and synchronous alignment is carried out before decoding to improve the decoding success rate.

The invention relates to a voice control instruction error correction method and system. When a voice control instruction is received, whether the received voice control instruction meets an identification error condition is analyzed, when the received voice control instruction meets the identification error condition, a voice control instruction error correction mode is started, and based on the started voice control instruction error correction mode, error correction is carried out on the voice control instruction meeting the identification error condition through a man-machine interaction mode, such that error correction of the voice control instruction with identification errors is realized, and the voice control accuracy is improved.

A method for interleaving data frames transmitted via a modem pool, each of the data frames including a plurality of codewords having a predefined level of error correction, including assigning the data frames to corresponding modem timeframes, where codeword symbols in each of the data frames are assigned to time slots in the modems in the corresponding timeframes such that the level of error correction is sufficient to correct error / loss caused to any of the symbols given a predefined level of modem loss / malfunction, and moving any of the codeword symbols assigned to one of the timeframes to another of the timeframes such that the level of error correction is sufficient to correct error / loss caused to any of the symbols given a predefined level of cross-modem error burst while preserving the level of error correction sufficient to correct error / loss caused to any of the symbols given the level of modem loss / malfunction.

The invention is suitable for the field of communication and provides a serial communication error correction method and a serial communication error correction system. The method comprises the following steps that a receiving end chip receives data sent by a transmitting end chip; according to a beginning character, a final character and a data length which are predefined, the receiving end chip judges whether the data sent by the transmitting end chip is effective data; when the data is the effective data, the receiving end chip and the transmitting end chip continuously carry out data exchange; and when the data is wrong data, the receiving end chip enters an error correction mode to carry out error correction. According to the invention, when data communication has a communication error, both communication parties can implement self-correcting on the data, so that both the parties can be enabled to receive the correct data sent by opposite sides and quality of communication data is ensured.

A subscriber terminating unit includes an error count counting portion counting an error count in a predetermined time range based on the number of corrections by an error correction function and an error count transmitting portion transmitting the error count to an office terminating unit. The office terminating unit includes an error count receiving portion receiving the error count from the subscriber terminating unit as a received error count and a correction method determining portion determining, based on the received error count, an error correction method or an error correction disuse which is used in the subscriber terminating unit.

The invention discloses a language learning method and system based on visual equipment, and the method and system are used for carrying out the language type interactive operation through the intelligent visual equipment. The method comprises the steps: making a teaching video corresponding to teaching contents based on the teaching contents and a corresponding video material; integrating the teaching video on the visual equipment with the function of voice interaction, so that a user learns a language through watching the teaching video played by the visual equipment; receiving a voice content sent by the user, and carrying out the voice recognition of the voice content; entering a voice recognition error correction mode according to a recognition result, or entering an intelligent interactive dialogue mode. The method achieves a purpose of carrying out the language type interaction operation through the intelligent visual equipment, and the user can learn the language freely and autonomously through the visual equipment, thereby solving a problem of weakness of mute learning in conventional language learning, improving the flexibility and convenience of language learning, and improving the user experience to a certain extent.

The present invention discloses methods and systems for transmitting data packets from a first communications router to a second communications router through an aggregated connection comprising a plurality of tunnels. The first communications router receives a first data packet belonging to a data session from a first host. The first communications router then transmits the first data packet to the second communications router and stores the first data packet in a local storage medium. The first communications router determines whether an error correction mode is activated. If an error correction mode is activated, the first communications router retransmits the first data packet and also transmits an error correction packet corresponding to the first data packet.

The invention provides a method for correcting multiple-sensor point cloud registration errors. The method is implemented based on Matlad software platform by taking a laser three-dimensional human body scanner as a scan tool and a hollow alumium-alloy cylinder as a standard object; the method specifically comprises the steps of establishing a true value, establishing a relationship between scan data and a circular function of the true value, establishing an error correction model and compensating with the error correction mode. The shape of the hollow cylinder as the standard object is simple so that the machining accuracy can be guaranteed; the height of the cylinder is equal to a scan height, so that the multiple-sensor point cloud registration errors in the whole scan area can be effectively corrected; a correction parameter can be obtained according to a global error law of each layer and is unrelated to the position of an object to be detected, so that the multiple-sensor point cloud registration error of an object in any position within the whole scan area can be effectively corrected, and therefore, the method is very suitable for the laser three-dimensional human body scanner field. A correction value obtained by the method is capable of effectively reducing the error of a sectional fitting size.

An apparatus is capable of executing a facsimile communication using an Error Correction Mode (ECM) function based on a facsimile procedure with a communication partner connected via an Internet Protocol (IP) network. In response to receiving, from the communication partner via the network, a communication start request including information indicating a transport protocol for use in the communication, if the apparatus determines that the transport protocol for use in the communication does not have the error correction function, the apparatus sends to the communication partner a notification indicating that the apparatus is capable of executing the communication using the ECM function. Otherwise, if the apparatus determines that the transport protocol for use in the communication has the error correction function, the apparatus sends to the communication partner a notification indicating that the apparatus is incapable of executing the communication using the ECM function.

An embodiment of the present invention includes a fax communication system for communicating fax information between a first fax machine having error correction capability and a second fax machine. The first and second fax machines are coupled to communicate with one another across a packet switching network. A network device is coupled to received fax information from the first fax machine and accumulates a portion of the fax information and stalls the second fax machine while accumulating the fax information portion until the latter is transmitted to the second fax machine free of errors across the packet switching network. Accordingly, information traffic across the packet switching network is decreased thereby avoiding a network avalanche effect.

An iterative error correcting decoder is provided. In one implementation, the iterative error correcting decoder includes an equality constraint node and a parity check node, the parity check node. The parity check node includes parity logic configured to receive input data bits from the equality constraint node and determine a first minimum value and a second minimum value associated with the input data bits using a MinSum algorithm. An enhancement function is performed on the first minimum value and the second minimum value. The enhancement function compares each of the first minimum value and the second minimum value with a first pre-determined constant value, and responsive to the first minimum value and the second minimum value being smaller than the first pre-determined constant value, the enhancement function passes the first minimum value and the second minimum value without any changes as output of the MinSum algorithm.

An apparatus is capable of executing a facsimile communication using an Error Correction Mode (ECM) function based on a facsimile procedure with a communication partner connected via an Internet Protocol (IP) network. In response to receiving, from the communication partner via the network, a communication start request including information indicating a transport protocol for use in the communication, if the apparatus determines that the transport protocol for use in the communication does not have the error correction function, the apparatus sends to the communication partner a notification indicating that the apparatus is capable of executing the communication using the ECM function. Otherwise, if the apparatus determines that the transport protocol for use in the communication has the error correction function, the apparatus sends to the communication partner a notification indicating that the apparatus is incapable of executing the communication using the ECM function.

The invention discloses a method and a system for prohibiting an error correction mode during the IP faxing and aims to solve the problem that the real-time performance of the prior IP faxing is not strong. The method comprises the following steps: after the reported information about the error correction mode capacity of a receiver facsimile machine is received, at least one of a receiver facsimile machine gateway and a sender facsimile machine gateway judges whether the sender facsimile machine support the correction mode capacity according to the reported information about the error correction mode capacity, modifies the reported information about the error correction mode capacity to a non-support correction mode message in real time, and then forwards the non-support correction mode message. The system comprises an error correction mode capacity reporting unit used for reporting the information about the error correction mode capacity of the receiver facsimile, an error correction mode capacity judging unit used for judging whether the receiver facsimile support the error correction mode capacity, an error correction mode capacity modifying unit used for modifying the reported information about the correction mode capacity into the non-support correction mode information, and a forwarding unit used for forwarding the information about the correction mode capacity. The invention reduces the time delay in the facsimile posting and enhances the real-time performance.

The present invention is directed to a system for reliably transmitting characters encoded as audible signals using voice over Internet protocol communication systems. According to an embodiment of the present invention, tones within a sequence of tones encoding a textual character are transmitted using two data packets. The first data packet includes a segment of time having a starting boundary that is synchronized with the start of the encoded tone and extending for a time period equal to about one-half the total time period of the tone. The second packet encodes the remaining half of the audible tone. At the receiving end, data packets encoding a textual character are ordered according to the position occupied by the data encoded by the packet within the sequence of tones. If any unpaired packets of data are detected at the receiving end, the characteristics of the packets that are unpaired are copied into the time slot that would have been occupied by the missing packet. Accordingly, the present invention allows for the accurate transmission of textual characters over VoIP networks, even where a packet of data encoding part of a sequence of packets encoding a character is dropped.

A successive approximation register analog to digital converter (SAR ADC) receives an input voltage and a plurality of reference voltages. The SAR ADC includes a charge sharing DAC. The charge sharing DAC includes an array of MSB (most significant bit) capacitors and an array of LSB (least significant bit) capacitors. A zero crossing detector is coupled to the charge sharing DAC. The zero crossing detector generates a digital output. A coarse ADC (analog to digital converter) receives the input voltage and generates a coarse output. A predefined offset is added to a residue of the coarse ADC. A successive approximation register (SAR) state machine is coupled to the coarse ADC and the zero crossing detector and, generates a plurality of control signals. The plurality of control signals operates the charge sharing DAC in a sampling mode, an error-correction mode and a conversion mode.

The invention relates to a voice-control accuracy rate adjusting method and system. At every preset first time interval or when voice control accuracy rate adjusting instructions are received, a controlled terminal determines the voice control instructions with the accuracy rate lower than a preset threshold at a preset second time interval, a voice control instruction error correction mode is started and on the basis of the started voice control instruction error correction mode, error correction is conducted on the determined voice control instructions in a human-computer interaction mode. The voice-control accuracy rate adjusting method and system can realize correction of the voice control instructions with a low recognition accuracy rate and improve the voice control accuracy.

The invention relates to a generating method for a microminiaturize Chinese sensible code and a symbol thereof. The code picture of the invention consists of a location detecting graph, a location graph, a location detecting graph isolating symbol, format information, a coding area and a blank area. The generating method for the microminiaturize Chinese sensible code includes: coding the information into a data code according to a set rule; generating a corresponding error correcting code to a binary data bit flow accomplished by data coding according to the error correcting mode of a selected error correcting grade; calculating the size needed by a two-dimensional bar code symbol; generating the location detecting graph, generating the format information and setting the location graph. The method has the advantages that the location detecting graph and the distribution structure thereof of the invention have confirmed location information; the bar code symbol is compacter; more effective information can be held in a limited symbol area as much as possible.