This application is directed to compressing check node data for an electronic device. The electronic device identifies a check node corresponding to a subset of codeword symbols in a block of data and determines check node data that indicates a likelihood of the subset of codeword symbols being erroneous. A set of data bits are determined based on a value combination of data items of the check node data to uniquely identify the value combination among a set of selected value combinations according to a predefined relationship. The electronic device stores, in a memory block, the set of data bits representing the data items of the check node data of the check node. Each data item requires more data bits to represent all possible values of the respective data item than data bits of the set of data bits.

This application is directed to compressing check node data for an electronic device. The electronic device identifies a check node corresponding to a subset of codeword symbols in a block of data and determines check node data that indicates a likelihood of the subset of codeword symbols being erroneous. A set of data bits are determined based on a value combination of data items of the check node data to uniquely identify the value combination among a set of selected value combinations according to a predefined relationship. The electronic device stores, in a memory block, the set of data bits representing the data items of the check node data of the check node. Each data item requires more data bits to represent all possible values of the respective data item than data bits of the set of data bits.

In an example implementation of this disclosure, a message passing low density parity check (LDPC) decoder may, during decoding of a first group of bits, lock a first variable node upon a bit-value probability of the first variable node reaching a determined threshold, and lock a first check node upon all variable nodes connected to the first check node being locked. The LDPC decoder may cease decoding the first group of bits upon all variable nodes of the LDPC decoder being locked, all check nodes of the LDPC decoder being locked, reaching a maximum number of iterations, or reaching a timeout. During a particular iteration of the decoding of the first group of bits in which the first variable node is locked, the LDPC decoder may refrain from generating a bit-value probability for the locked first variable node.

An encoding method, a decoding method, an electronic device and a storage medium are disclosed. The encoding method includes: acquiring stored data in a storage system, and acquiring nodes corresponding to the stored data to obtain a number of the nodes; dividing the acquired stored data into a sequence of information vectors, and generating an information matrix according to the number of the nodes and a number of the sequence of information vectors; and calculating an encoded block according to each information vector and the information matrix to obtain a sequence of encoded blocks.

This application is directed to compressing check node data for an electronic device. The electronic device identifies a check node corresponding to a subset of codeword symbols in a block of data and determines check node data that indicates a likelihood of the subset of codeword symbols being erroneous. A set of data bits are determined based on a value combination of data items of the check node data to uniquely identify the value combination among a set of selected value combinations according to a predefined relationship. The electronic device stores, in a memory block, the set of data bits representing the data items of the check node data of the check node. Each data item requires more data bits to represent all possible values of the respective data item than data bits of the set of data bits.

In an example implementation of this disclosure, a message passing low density parity check (LDPC) decoder may, during decoding of a first group of bits, lock a first variable node upon a bit-value probability of the first variable node reaching a determined threshold, and lock a first check node upon all variable nodes connected to the first check node being locked. The LDPC decoder may cease decoding the first group of bits upon all variable nodes of the LDPC decoder being locked, all check nodes of the LDPC decoder being locked, reaching a maximum number of iterations, or reaching a timeout. During a particular iteration of the decoding of the first group of bits in which the first variable node is locked, the LDPC decoder may refrain from generating a bit-value probability for the locked first variable node.

This application is directed to compressing check node data for an electronic device. The electronic device identifies a check node corresponding to a subset of codeword symbols in a block of data and determines check node data that indicates a likelihood of the subset of codeword symbols being erroneous. A set of data bits are determined based on a value combination of data items of the check node data to uniquely identify the value combination among a set of selected value combinations according to a predefined relationship. The electronic device stores, in a memory block, the set of data bits representing the data items of the check node data of the check node. Each data item requires more data bits to represent all possible values of the respective data item than data bits of the set of data bits.

This application is directed to compressing check node data for an electronic device. The electronic device identifies a check node corresponding to a subset of codeword symbols in a block of data and determines check node data that indicates a likelihood of the subset of codeword symbols being erroneous. A set of data bits are determined based on a value combination of data items of the check node data to uniquely identify the value combination among a set of selected value combinations according to a predefined relationship. The electronic device stores, in a memory block, the set of data bits representing the data items of the check node data of the check node. Each data item requires more data bits to represent all possible values of the respective data item than data bits of the set of data bits.

This application is directed to compressing check node data for an electronic device. The electronic device identifies a check node corresponding to a subset of codeword symbols in a block of data and determines check node data that indicates a likelihood of the subset of codeword symbols being erroneous. A set of data bits are determined based on a value combination of data items of the check node data to uniquely identify the value combination among a set of selected value combinations according to a predefined relationship. The electronic device stores, in a memory block, the set of data bits representing the data items of the check node data of the check node. Each data item requires more data bits to represent all possible values of the respective data item than data bits of the set of data bits.