6 results about "Burst error" patented technology

The application relates to the technical field of memory data error correction, and provides a layered error correction method and system for DDR5 memory and a medium, which comprises the following steps: configuring initial resource weights for three layered levels of single-bit error correction, double-adjacent error correction and triple-discrete error detection; after reading memory data and corresponding ECC error correction check bits, determining an error category through comparison operation, and dynamically adjusting resource proportions of each level in combination with parameters such as a real-time running frequency of the memory; then, corresponding error correction is completed or triple-discrete error alarm is triggered according to the error type, and the process is continuously cycled. The application can support mixed processing of multiple error types, dynamically allocate resources in an adaptive high-frequency working state, improve the detection and response capability for burst errors, and improve the error detection and correction efficiency.

The application provides a search method and device for secondary permutation polynomial interleaving parameters, and belongs to the technical field of communication. The method comprises the following steps: receiving the data block length N of a communication system as an interleaving length; reducing redundancy candidates by equivalent class parameter compression; generating two candidate sets of parameters; performing permutation combination on the two candidate sets to obtain all parameter candidate pairs, and sequentially performing algebraic metric preliminary screening and S distance fine screening on the candidate parameter pairs to output high-performance interleaving parameters; and configuring the screened optimal QPP interleaving parameters into a Turbo code interleaver of the communication system to perform interleaving processing on actual signals. The application can be used in various communication systems, solves the problems of low search efficiency, large candidate set scale and insufficient local burst error suppression capability of existing QPP interleaving parameters, and effectively reduces the complexity of parameter search and simulation workload.

The application relates to the technical field of NAND flash error correction, in particular to a high-capacity NAND flash error correction method and system based on a layered ECC (Error Correction Code). The method comprises the following steps: obtaining physical storage structure information of the high-capacity NAND flash, wherein the physical storage structure information comprises a plurality of storage blocks, a plurality of storage pages and original error code rate characteristics of each storage layer. The application realizes accurate error correction for the differences of different storage layers by designing a two-level layered architecture of a strong error correction layer and an adaptive error correction layer and dynamically configuring an error correction strategy according to the original error code rate characteristics of each storage layer. The strong error correction layer uses Reed-Solomon error correction code to reliably store user data. The error correction code can show good error correction ability when facing random errors and burst errors based on Galois field arithmetic operation, the coding gain is increased by about 3 dB compared with a single-layer scheme, and the uncorrectable error frame rate of the user data is effectively reduced.

The present invention relates to a method for generating an efficiently transmittable bit sequence with limited disparity and limited run-length. The proposed method enables data to be transmitted particularly efficiently over a transmission channel. One of the advantages of the present invention over the prior art is that the physical behavior on the transmission channel can always be controlled deterministically while reducing resource requirements. Thus, according to the proposed method, bit errors are minimized, and transmission errors can be corrected efficiently, i.e., with minimal technical effort. Furthermore, the encoder used is designed with a minimum number of gates, and interleaving is implicitly present in the proposed method, which ensures that so-called burst errors can be corrected particularly favorably.

This invention relates to a method for improving forward error correction of serial coding in data transmission within a vehicle, and compared to the prior art, it offers the advantage of always being able to deterministically control the physical behavior on the transmission channel while reducing resource requirements. Accordingly, according to the proposed method, bit errors are minimized, and transmission errors can be corrected efficiently, i.e., with minimal technical effort. Furthermore, the encoder used is designed with a minimum number of gates, and interleaving is implicitly provided in the proposed method, which is based on the fact that so-called burst errors can be corrected particularly favorably. This implicit interleaving makes it possible to eliminate the buffer memory that was conventionally required for explicit interleaving. In addition, the invention ensures that user data can be encoded favorably with respect to transmission along with correction metadata. According to the invention, it can be guaranteed that not only user data but also correction data can be line-coded or line-encoded. The invention also relates to a system device similarly designed to perform this method, and a computer program product having control commands for performing this method.

This invention discloses an error-resistant robust image steganography method based on low-frequency embedding without background noise. The method includes: preprocessing and hybrid encoding the original secret image to generate a final secret embedding stream; performing a 5 / 3 integer wavelet transform on the carrier image to decompose the frequency domain, extracting the first-level low-frequency sub-band, calculating texture activity in blocks, and generating an embedding mask; setting the quantization step size and jitter bias based on quantization index modulation, adjusting the block mean based on the bits to be embedded, and superimposing the offset to complete the embedding; performing integer wavelet transform and block statistics on the received image, obtaining the initial bit stream using the minimum distance method of quantization index modulation, and reconstructing the output secret image through deinterleaving, error correction decoding, inverse whitening, and inverse scrambling. This invention solves the problems of poor security and weak resistance to burst errors in traditional steganography, achieving a balance between robustness and concealment, and improving the reliability of covert communication in complex channels.