Patent application number | Description | Published |
20090100311 | Method of Constructing Low Density Parity Check Code, Method of Decoding the Same and Transmission System For the Same - The present invention relates to a method of constructing a low density Parity Check code, a method of decoding the same and a transmission system using the same. The method comprises steps of: constructing a low density Parity Check matrix of the low density Parity Check code by using a fixed pattern; blocking data sent from an information source ( | 04-16-2009 |
20100180175 | METHOD FOR CONSTRUCTING LDPC CODE IN THE MOBILE DIGITAL MULTIMEDIA BROADCAST SYSTEM - A method for constructing LDPC (Low-Density Parity-Check) code in the mobile digital multimedia broadcast system is provided, wherein the Low-Density Parity-Check matrix of the LDPC code is iteratively constructed according to a code-table and expansion method, and the code-table is a part of the constructed Low-Density Parity-Check matrix. According to the constructing method of the present invention, the LDPC code having excellent performance of error correcting coding which is applicable to the mobile digital multimedia broadcast system. | 07-15-2010 |
20100192044 | QC-LDPC CODE DECODER AND CORRESPONDING DECODING METHOD - An efficient general QC-LDPC code decoder includes a general-purpose processor for distributing the storage space of the data memory block, and establishing an index for data addressing; a data memory block for storing the information used during decoding; a hardware accelerator for conducting part or all of the information processing operations including parity check, check node updating and variable node updating. A corresponding QC-LDPC code decoding method includes initializing the variable node information and performing parity check on the check matrix row block by row block; updating the check node row block by row block and updating the variable node column block by column block if any check equation is not met. | 07-29-2010 |
20110044390 | SYSTEM AND METHOD FOR GENERATING AND DETECTING THE IDENTIFIER SEQUENCE OF THE BANDWIDTH-LIMITED TRANSMITTER - A system and method for generating and detecting identifier sequence of a bandwidth-limited transmitter are disclosed, comprising an identifier sequence generating portion and a detection portion. The identifier sequence generating portion comprises: generating a frequency-domain random sequence; generating a frequency-domain orthogonal sequence; performing frequency-domain truncation; performing frequency-time transformation; and performing cycle extension. The identifier sequence receiving portion comprises: truncating the time-domain for the received signal; performing time-frequency domain transformation to obtain a frequency-domain signal; generating frequency-domain random sequence; generating a frequency-domain orthogonal sequence; correlating the frequency-domain orthogonal sequence with the frequency-domain signal de-scrambled by the frequency-domain random sequence; and detecting an output from a frequency-domain correlator by a threshold detecting device and determining the transmitter identifier sequence. The random sequence bandwidth generated by the system and the method of the present invention can be configured flexibly according to transmission bandwidth requirement, and the sequence may be arbitrarily allocated at the power of each frequency point inside the bandwidth. The present invention may be widely applied to multimedia broadcasting, terrestrial radio broadcasting, cable broadcasting and the like. | 02-24-2011 |
20110051825 | A MULTI-CARRIER DIGITAL MOBILE MULTIMEDIA BROADCAST SYSTEM AND THE DIGITAL INFORMATION TRANSMISSION METHOD THEREOF - The present invention discloses a multi-carrier digital multimedia broadcast system and the digital information transmission method thereof. After RS encoding and byte interleaving, LDPC encoding, bit interleaving and constellation mapping to an upper layer of data streams in turn, the obtained data symbol is multiplexed with scattered pilots and continual pilots which include the system information to form an OFDM frequency domain symbol and scrambled; an OFDM time domain symbol is generated by IFFT transforming, and after inserted with the frame head to build a time slot, it is connected to form a signal frame of the physical layer; the signal frame of the physical layer is transmitted after being low-pass filtered and orthogonal upconverted. The system and method thereof provide wireless broadcast with high quality such as audio, video and multimedia data and the like for mobile, fixed and portable receivers, and can use the satellite transmission and terrestrial transmission method for transmitting. The method utilizes the LDPC OFDM scheme, and the system applies the microwave and large scale integrated circuit technologies while fulfills the needs for low cast and high performance. | 03-03-2011 |
20110239077 | METHOD FOR CONSTRUCTING CHECKING MATRIX OF LDPC CODE AND CODING AND DECODING APPARATUS UTILIZING THE METHOD - The present invention relates to a method for constructing LPDC code check matrix and encoding and decoding devices using the same. The encoding device encodes the inputted binary information and outputs the encoded system code sequence of position transformation. The encoding device comprises: a matrix multiplication module outputting a check sequence p which is obtained through the binary information sequence m multiplied with a matrix; a sorting index module having N memory units storing index values of a sorting table IDX in turn; and a sorting output module for sorting the m and p and outputting a code word c based on the index value stored in the sorting index table. The present invention constructs the LDPC code check matrix using an algebraic structure, obtaining the LDPC code with stable performance. In addition, the encoding and decoding devices of the present invention occupy less memory, which is preferable for optimization of the devices. | 09-29-2011 |
20120244894 | METHOD FOR DISPLAYING RELATED INFORMATION AND MOBILE COMMUNICATION TERMINAL - A method for displaying related information in a mobile communication terminal includes: acquiring information of the contact stored in the mobile communication terminal, searching for media information in the mobile communication terminal according to the information of the contact and acquiring media information matched with the information of the contact, and displaying the media information matched with the information of the contact. The method and terminal involved in the present invention enable a mobile communication terminal user to search for media information related to a contact through the contact and meanwhile can further view the information of the contact related to the media information through the media information, by associating media files with contacts. | 09-27-2012 |
20130097165 | METHOD AND DEVICE FOR ASSOCIATING MEDIA FILES - The present invention relate to the field of mobile communications, and disclose a method and a device for associating media files. The method includes: writing a second media file associated with a first media file and abstract information of the second media file into an association segment of the first media file, where the abstract information of the second media file is used to retrieve the first media file; and re-storing the first media file. With the present invention, complex file association management may be avoided. | 04-18-2013 |