31results about How to "Improve error correction rate" patented technology

The invention discloses a matrix two-dimensional bar code and coding and decoding method, which is characterized by the following: the code graph of bar code is composed of gapless arrangement ní‡m rectangle unit information blocks, wherein m and n is positive integral more than 1; n is different from or the same as m; each rectangle unit information block is composed of gapless arrangements n'í‡m' of different optical characters with two rectangle colorful blocks, wherein n' and m' is positive integral more than 1; n' is different from or the same as m'; each rectangle unit information block contains location ID character and data region; the shape of ID character displays L type or inversed L type along two adjacent edges of rectangle unit information block frame. The bar code contains the following characters: large capacity, high error-correcting rate, high pollution-proof and distortion-proof ability, multiple language editing codes, separating coding and decoding code, random scale adjustment and omnibearing recognizing, which can be applied in multiple domains.

The invention relates to a two dimensional bar code with large information capacity and a system, belonging to the field of the information publication. Through building the two dimensional bar code matching with the character feature, the invention realizes the application suitable for the length uncertainty of the bar code and the information revivification based on the template by a plurality of continuous two dimensional bar codes. The way adopting the two dimensional bar code is used to record the extended information code, wherein the code way is simple and easy to extend. The two dimensional bar code of the invention can conveniently bear the extended information content with high fault tolerant ratio, simple making and using, which can be used matching with the characteristic easy to extend of the bar code template and has wide application foreground in the field of the information publication.

The invention relates to an embedded multimedia intelligent GPS guiding device which comprises a GPS module used to provide the location and the time information of the guiding device, a micro hard disk used to store the flow media, a multimedia control board used to decode the flow media, a display module used to display the flow media and the guiding interface and a guiding host board which is connected with the GPS module, the micro hard disk, the multimedia control board and the display module and can sample the GPS signal and compute the GIS data. The embedded multimedia intelligent GPS guiding device combines the multimedia system and the guiding system and adopts ARM inner core processor and micro hard disk as flow media medium.

The invention discloses a cross-medium equipment-independent and discrete modulation continuous variable quantum key distribution system. An eight-state quantum state is prepared by a trusted intermediate party through discrete modulation, the eight-state quantum state is sent to Alice and Bob after photon subtraction, Alice and Bob perform demodulation and homodyne detection on the received quantum state respectively, and a security key is established within an effective distance. According to the invention, a continuous variable quantum key distribution technology in a free space is improved, and the quantum state is prepared and sent by the trusted intermediate party, so that the system has equipment independence, and the communication security is ensured; the photon subtraction operation can improve the entanglement degree between the quanta so as to improve the transmission distance; the homodyne detection can effectively filter the interference of the outside on the optical signal, and the detection result can be well obtained even if the optical signal is influenced to a certain extent. The scheme is oriented to equipment independence under an air-water channel, discrete modulation continuous variable quantum key distribution is utilized, and more practicability is brought to free space communication of quanta.

The invention relates to the technical field of computers, in particular to a data storage method and device, a storage medium and electronic equipment. The method comprises the following steps: determining the number of check codes, the number of bits of each check code, the number of storage chips and the number of interfaces on each storage chip according to the number of bits of to-be-stored data and a check mode; each check code is divided into a plurality of sub check codes, and the number of the sub check codes of each check code is the same as that of the storage chips; and respectively storing each sub check code of each check code into the different storage chips through the interface on each storage chip in a manner of respectively storing each sub check code of one check code into the different storage chips. The reliability of data storage is improved, and the storage steps are simple and easy to execute.

The invention provides an optical recording medium, a data recording device and a data recording method used in the device. In a method for recording data on an optical disc, each of a plurality of error correction code (ECC) blocks is divided into a plurality of partitions. Next, the partitioned data is interleaved so that each ECC block is alternately and equally selected to generate recording blocks. The resulting recording blocks are modulated and recorded on an optical disc. As a result, there are provided an optical recording medium, a data recording device, and a data recording method used in the device, which are compatible with the format of a conventional high-density digital video disc (DVD) and have a higher error correction rate.

The present invention provides a wireless communication device and a wireless communication method. A wireless communication device capable of improving the error correction rate of HARQ even in the case of frame aggregation is provided. The wireless communication device according to an embodiment includes a frame division unit, a block coding unit, a coded frame generation unit, a coded frame aggregation unit, and a transmission unit. The frame dividing unit divides the frame data by the first predetermined number of bits, and adds a padding bit as a block when the first predetermined numberof bits is not satisfied. The block coding unit generates a coding block in which an error correction bit sequence to which a second predetermined number of bits is added is generated in the block. The coded frame generation unit combines the coded block and generates an encoded frame. The coded frame aggregation unit aggregates the coded frames to generate transmission packet data. The transmitting unit transmits the transmission packet data.

Provided are an optical information recording medium, a data recording device, and a data recording method used by the device. Optical information recording medium containing data included in one or more recording blocks. Identifiers in a plurality of sectors including a plurality of error correction code (ECC) blocks are sequentially extracted so that the ECC blocks are equally selected and arranged at predetermined intervals. As a result, the provided optical information recording medium, data recording device and data recording method used by the device have a higher error correction rate.

The invention belongs to the technical field of anti-counterfeiting products, and particularly relates to a plastic film uncovering type special code anti-counterfeiting label and a preparation methodthereof. A transparent PET layer, an isolation layer, a printing layer, a white ink layer, an adhesive layer and a silicone oil paper layer are sequentially arranged from top to bottom. The special code anti-counterfeit label can be uncovered and is divided into a stripping part and a reserved part, and the stripping part is a PET layer. The reserved bottom part sequentially comprises the isolation layer, the printing layer, the white film layer and the adhesive layer from top to bottom. According to the plastic film uncovering type special code anti-counterfeiting label, the special anti-counterfeiting code adopted in the printing layer is an invisible code which does not reduce the attractive appearance of a commodity package, rapid and accurate recognition can be conducted, vector datacan be formed, and batch processing printing of high-speed variable information can be conducted. When the anti-counterfeiting code is damaged by 75%, that is, the isolation layer is damaged, and theanti-counterfeiting code is incomplete, the anti-counterfeiting code can still be read, the error correction rate is high, and the anti-counterfeiting code is not easy to copy.

The invention provides a graphic code generation method and device, a graphic code recognition method and device and electronic equipment. The graphic code generation method comprises the following steps: acquiring target information; performing information deformation on the target information to obtain error correction information; generating an information code according to the target information, and generating an error correction code according to the error correction information; and generating a corresponding graphic code according to the information code and the error correction code. According to the embodiment of the invention, the information code and the error correction code which contain the same content are generated in the graphic code, so that the graphic code has a good error correction rate, and even if the graphic code is covered with a dirty part, the graphic code can be accurately identified, and thus the multi-polluted working environment of storage, materials and the like can be adapted to, and the identification efficiency of the graphic code is improved.

The invention discloses a video data transmission method and system. The method comprises the following steps that: a video data transmitting end performs Reed-Solomon (RS) coding on each frame of image data of a first system format in video data, and converts the image data being subjected to RS coding into transmission data of a second system format; and when the transmission data are received, a receiving end converts the transmission data into the first system format, performs RS decoding on the transmission data of the first system format to restore the transmission data into the image data, and integrates the received image data into the video data. According to the video data transmission method and system, the transmitting end performs RS coding on the image data of the first system format, and converts the image date into the second system format to transmit the image data of the second system format. The receiving end receives the data of a second system, converts the data of the second system into the first system format, and performs RS decoding on the data of the first system forma, so that the first and second system formats can be selected according to a code rate of image data to be transmitted and a transmission requirement; an error correction rate is increased; and an anti-jamming capability is enhanced.

The invention discloses a short message transmission method, a system and equipment. The method comprises steps that: a calling eMSC receives a short message from calling UE; the calling eMSC determines whether a SMSC address contained in the short message, such as a short message center address, is correct; if no, the calling eMSC utilizes calling IMSI contained in the short message to query a pre-stored SMSC address table to acquire an SMSC address corresponding to the calling IMSI, and the queried SMSC address is further utilized to send the short message to the corresponding SMSC, and the SMSC sends the short message to a called UE; if yes, the calling eMSC utilizes the SMSC address contained in the short message to send the short message to the corresponding SMSC, and the SMSC sends the short message to the called UE. According to the method, the calling eMSC can acquire the correct SMSC address on the basis of the SMSC address table, the short message is sent to the correct calling ownership SMSC, so failure in sending the short message is avoided, the SMSC address correcting rate is improved greatly, and the sending success rate of the short message is improved.