401 results about "4-bit" patented technology

The invention discloses a data validation, mirroring and error/erasure correction method for the dispersal and protection of one and two-dimensional data at the micro level for computer, communication and storage systems. Each of 256 possible 8-bit data bytes are mirrored with a unique 8-bit ECC byte. The ECC enables 8-bit burst and 4-bit random error detection plus 2-bit random error correction for each encoded data byte. With the data byte and ECC byte configured into a 4 bit×4 bit codeword array and dispersed in either row, column or both dimensions the method can perform dual 4-bit row and column erasure recovery. It is shown that for each codeword there are 12 possible combinations of row and column elements called couplets capable of mirroring the data byte. These byte level micro-mirrors outperform conventional mirroring in that each byte and its ECC mirror can self-detect and self-correct random errors and can recover all dual erasure combinations over four elements. Encoding at the byte quanta level maximizes application flexibility. Also disclosed are fast encode, decode and reconstruction methods via boolean logic, processor instructions and software table look-up with the intent to run at line and application speeds. The new error control method can augment ARQ algorithms and bring resiliency to system fabrics including routers and links previously limited to the recovery of transient errors. Image storage and storage over arrays of static devices can benefit from the two-dimensional capabilities. Applications with critical data integrity requirements can utilize the method for end-to-end protection and validation. An extra ECC byte per codeword extends both the resiliency and dimensionality.

A memory system provides data error detection and correction and address error detection. A Single-byte Error-Correcting/Double-byte Error-Detecting (SbEC/DbED) code with the byte being a 4-bit nibble is used to detect up to 8-bit errors and correct data errors of 4 bits or less. Rather than generating address parity, which is poor at detecting even numbers of errors, a cyclical-redundancy-check (CRC) code generates address check bits. A 32-bit address is compressed to just 4 address check bits using the CRC code. The 4 address check bits are merged (XOR'ed) with two 4-bit nibbles of the data SbEC/DbED code to generate a merged ECC codeword that is stored in memory. An address error causes a 2-nibble mis-match due to the redundant merging of the 4 address check bits with 2 nibbles of data correction code. The CRC code is ideal for detecting even numbers of errors common with multiplexed-address DRAMs.

A method and apparatus for transmitting effective channel status information (CSI) in a wireless communication system supporting multiple carriers are disclosed. A method for transmitting CSI of DL transmission via uplink in a wireless communication system includes transmitting a rank indicator (RI) at a first subframe, and transmitting a first precoding matrix indicator (PMI), a second PMI, and a wideband (WB) channel quality indicator (CQI) at a second subframe. UE preferred precoding matrix is indicated by a combination of the first PMI and the second PMI. A subsampled codebook for each precoding codebook of ranks from Rank-1 to Rank-4 is applied to the first PMI and the second PMI, and a sum of the first PMI and the second PMI for each of Rank-1 to Rank-4 is comprised of 4 bits.

An RNG circuit is connected to the parallel port of a computer. The circuit includes a flat source of white noise and a CMOS amplifier circuit compensated in the high frequency range. A low-frequency cut-off is selected to maintain high band-width yet eliminate the 1/f amplifier noise tail. A CMOS comparator with a 10 nanosecond rise time converts the analog signal to a binary one. A shift register converts the serial signal to a 4-bit parallel one at a sample rate selected at the knee of the serial dependence curve. Two levels of XOR defect correction produce a BRS at 20 kHZ, which is converted to a 4-bit parallel word, latched and buffered. The entire circuit is powered from the data pins of the parallel port. A device driver interface in the computer operates the RNG. The randomness defects with various levels of correction and sample rates are calculated and the RNG is optimized before manufacture.

The digital video referencing frame image is compressed block by block by applying lossless compression algorithm to pixel components with full length, or 1 bit, 2 bits, 3 bits or 4 bits LSB bits truncation. If a sub-block has high complexity which results in more than 3 bits error for most pixel components, a transfer algorithm with quantization and VLC coding is applied to compress this sub-block. Should the complexity is higher than a threshold or at least one sub-block having error of more than 3 bits for most pixel components, truncating 1 LSB bit of sub-block with simple pattern to save more bits to be allocate to code the sub-block with highest complex pattern.

A device and method for generating a codebook. The device includes a generator. The codebook generator is configured to generate a precoding codebook using an 8-PSK alphabet-based 4 bits 4 TX and 8 TX antennas for use in a closed-loop SU-MIMO scheme. According to aspects of the present disclosure, it is possible to generate a precoding codebook for use in 8 Transmission Antenna systems.

The invention discloses an image coding method for improving coding efficiency. The method comprises the following steps: searching a 4-bit CBP code table for the code number corresponding to a 4-bit luminance CBP code and carrying out luminance coding according to the obtained code number; and searching the 4-bit CBP code table for the code number corresponding to a 4-bit chroma CBP code and carrying out chroma coding according to the obtained code number. The invention also discloses a device for realizing the method.

The invention discloses an encryption and decryption method for numeric type data. The method comprises the following steps that the numeric type data is converted into character strings; each character is sequentially converted into 4 bits according to the correspondence relationship between the numeric characters and the binary system, and a bit stream is formed; the number of 0 and 1 in the bit stream is counted, and an encryption secret key is obtained through calculation; the encryption secret key is utilized, a chaotic sequence with the pseudo-random property is generated by a chaotic system, in addition, chaotic signals are taken from the chaotic sequence and are sequenced in an ascending sequence, and the bit stream is scrambled according to the positions in accordance with the scrambling rule; the corresponding relationship between the four-digit binary coding mode and the visible ciphertext characters is utilized for converting the scrambled bit stream into the visible ciphertext character strings, and the ciphertext can be decrypted and recovered into the original data type data through adopting the similar method. According to the method provided by the invention, the corresponding table customization is adopted, the numeric type data is subjected to binary scrambling chaotic encryption processing, the safety and the feasibility of the data encryption are ensured, and in addition, the encryption efficiency is also greatly improved.

A continuous read operation may be achieved by using a data buffer having a partitioned data register and a partitioned cache register, user configurable internal ECC associated with the cache register, and fast bad block management. During a data read operation, the ECC status may be indicated by ECC status bits. The status (1:1), for example, may indicate for the Continuous Read Mode that the entire data output contains more than 4 bits errors/page in multiple pages. However, one may wish to know the ECC status of each page or of each page partition. For the former, the ECC status for the entire page may be determined and made in the status register at the end of the output of the page. For the latter, the ECC status of each page partition may be determined and output before output of the corresponding page partition.

An encryption device eliminates data contention and minimizes area by accessing twice data for a given time by using a memory device of two times faster access time. The encryption device for performing encryption of plain text blocks using data encryption standard algorithm, wherein the encryption device includes an initial permutation unit, a data encryption unit having n-stage (n is an even number) pipeline structure using a first clock, a second clock and a third clock, and an inverse initial permutation unit, the encryption device includes: a multiplexer for selecting one of n/3 48-bit inputs; 8 S-Boxes, each for receiving 6-bit address among the selected 48-bit and outputting 4-bit data; a demultiplexer for distributing 32-bit data from the S-Boxes to n/3 outputs; and a controller for control the multiplexer and the demultiplexer with a fourth clock and a fifth clock, wherein the fourth and the fifth clock are faster than the first, the second and the third clocks by n/3 times.

A phased-array receiver is adapted so as to be fully integrated and fabricated on a single silicon substrate. The phased-array receiver is operative to receive a 24 GHz signal and may be adapted to include 8-elements formed in a SiGe BiCMOS technology. The phased-array receiver utilizes a heterodyne topology, and the signal combining is performed at an IF of 4.8 GHz. The phase-shifting with 4 bits of resolution is realized at the LO port of the first down-conversion mixer. A ring LC VCO generates 16 different phases of the LO. An integrated 19.2 GHz frequency synthesizer locks the VCO frequency to a 75 MHz external reference. Each signal path achieves a gain of 43 dB, a noise figure of 7.4 dB, and an IIP3 of −11 dBm. The 8-path array achieves an array gain of 61 dB, a peak-to-null ratio of 20 dB, and improves the signal-to-noise ratio at the output by 9 dB.

Stations in a communications network are awakened by matching a pattern received from the communications network with patterns in the stations. When a match occurs, the stations are awakened. The patterns are arranged contiguously on word boundaries. A nibble (4 bits) in a mask word identifies the part of the pattern word to be used in the comparison.

A TDC (time/digital conversion) method based on an FPGA (field programmable gate array) fine delay unit is characterized in that a laser pulse trigger signal FRIG_IN (1) is processed by a substrate wiring delay (2) before reaching to a buffer BUFR (3) and is processed by a 64-line wiring delay (4) before reaching a 64-level fine delay unit IODEALY module (5); 1tap (78ps) is added to each level or each line of a fine delay unit IODELAY in order; delay precision of the 64-level fine delay unit IODEALY module (5) is controlled via a delay correcting unit IDELAYCTRL module (6); a signal subjected to bilateral sampling is processed by OR logic (10) into a primary judgment signal of a trigger signal; the primary judgment signal is processed by a 4-bit shift register 4bit shift reg (12), equal 0 logic (13) and AN gate logic (14) finally into a signal TRIG_OUT (15).

When highly redundant information that expresses five tones using 4 bits is transferred to a printer in terms of a unit data length in data transfer, efficiency is very poor. Hence, multi-valued data is quantized to 5-valued data, which is output as a 4-bit code that can express five values. 4-bit codes for three bits are combined to be converted into an 8-bit code. The 8-bit codes are packed into data of a 16-bit unit, and the packed data is transferred to the printer.

The invention relates to polythioetherimide and a preparation method thereof. The method is characterized by comprising the following steps: mono-substituted phthalic anhydride isomer with structural formula II is adopted as a reaction material to react with organic diamine NH2RNH2 with half mol equivalent weight at the temperature of about 100 DEG C to about 350 DEG C to generate binary-substituted phthalimide; then binary-substituted phthalimide and sulfur with about equimolar equivalent weight are subjected to coupling polymerization reaction at the temperature of about 60 DEG C to about 260 DEG C under the existence of reducing agent, catalyst and reaction auxiliary agent to generate polythioetherimide resin with structural formula I; and the molecular weight of the resin can be adjusted by end capping agent. The preparation method can greatly reduce the preparation cost and reaction steps, the whole process is more reasonable and practical, and the obtained resin has superior comprehensive properties such as good heat resistance, mechanical properties, melting processing property and the like, can be widely applied in the related fields such as high-temperature resistant engineering plastics, films, adhesives, enameled wires, foamed plastics, fiber, advanced composite materials and the like; in the structural formula II, A substituent is chlorine atom or nitro at 3-bit or 4-bit; and in the structural formula I, R is substituted or unsubstituted organic group.

An embodiment of the invention discloses a channel resource determination method of ACK/NACK feedback information and equipment. Through applying a technical scheme of the embodiment, alternative channel resource can be determined in an application scene employing a PUCCH format 1b with channel selection scheme. A determination problem of channel resource needed by channel selection is solved when a terminal device employs the PUCCH format 1b with channel selection scheme to transmit ACK/NACK feedback information which is subjected to configuration downlink intercarrier merging. A situation that the alternative channel resource can not be determined according to present implicit channel resource which is determined by a PDCCH which is transmitted only through a downlink main carrier is avoided. To a scene that the ACK/NACK feedback information is larger than 4 bits, transmission of the ACK/NACK feedback information through the PUCCH format 1b with channel selection scheme is realized. The method and the equipment are mainly suitable for a TDD system.

Embodiments of the present disclosure provide a method and apparatus for configuring channel quality indicator (CQI) and a method and apparatus for configuring modulation and coding scheme. The method for configuring CQI includes: configuring UE with a CQI index table by an eNB via CQI index table indication information, so that the UE determines the configured CQI index table according to the indication information, and calculates a CQI index according to calculated precoding matrix indicator (PMI) and rank indication (RI) by using the configured CQI index table. With the embodiments of the present disclosure, the eNB may configure different UEs with different ‘4-bit CQI tables’ and/or ‘modulation and TBS index tables’ while keeping the CQI index and the I_MCS bit number unchanged. Therefore, not only the CQI index and the I_MCS bit number need not to be increased, but also normal configuration of the LTE system may be ensured.

Error correction and error detection related to DRAM chip failures, particularly adapted server memory subsystems. The application of a code for 128 bit memories is applied to a 20 bit directory store to improve reliability of the directory store memory of the computer system. The code uses ×4 bit DRAM devices organized in a code word of 20 data bit words and 12 check bits. These 12 check bits provide a code capable of 4 bit adjacent error correction within a family (i.e., in a ×4 DRAM) and double bit non-adjacent error detection across the entire 20 bit word, with single bit correction across the word as well. Each device can be though of as a separate family of bits, errors occurring in more than one family are not correctable, but may be detected if only one bit in each of two families is in error. Syndrome generation and regeneration are used together with a specific large code word. Decoding the syndrome and checking it against the regenerated syndrome yield data sufficient for providing the features described.

This invention relates to a differential power loss analysis screen circuit applied in the DES ciphered chips composed of a screen unit and a complementary register unit to be connected with each other combining the basic structure of the DES ciphered plan. This invention is mainly against the cryptographic key of the 16-turn operation of the DES ciphered flow, the operation results of the 15-turn are sent to registers L15 and R15, in which, L15 is composed of two parts: an ordinary one of 28 bit and complementary one of 4 bit, part results of the 15-turn operation, the sub- cryptographic key of the 16-turn and the preset false sub-cryptographic key are sent to the screen unit.