49results about How to "Improve encoding rate" patented technology

This invention relates to an error-check and error-correction code circuit for storages and a method for reading and writing data by it taking matrix G as a logic core including: a decoding process and a coding process and a method for writing in data by this method. Apart from a decoding process and an error correction process, it also includes a coding process, and finally puts forward an error check and correction and coding circuit for realizing said two methods including a decoder, an error-correction circuit, a coding circuit, an interface circuit and related data transmission circuit so as to simplify layout of bottom circuit and speed up operation speed of circuits.

The invention discloses an interframe forecasting coding method, a decoding method, a coder, a decoder, a sub-pixel interpolation processing method and a sub-pixel interpolation processing device. The interframe forecasting coding and decoding technical proposal provided by the invention is that: sub-pixel interpolation is respectively performed on integer pixel samples of image blocks waiting for coding for a plurality of times through consideration of affection of texture distribution direction of images on precision of sub-pixel reference samples and by the means of adjusting interpolation directions, and multiple groups of sub-pixel reference sample values with different precisions are obtained, and then reference sample values with highest precision are selected from integer pixel sample values and various sub-pixel reference sample values, thereby encoding rate of a coding end is improved. The sub-pixel interpolation technical proposal provided by the invention is that: at least two different interpolation directions are set for each sub-pixel waiting for interpolation and corresponding predicted values are computed, and then optimal values are selected from all the predicated values and taken as optimal predicted values of sub-pixel samples waiting for interpolation, thereby the precision of the sub-pixel reference sample values is improved.

An object of the present invention is to provide a method for suppressing peak power at a high encoding rate in a multi-carrier transmission system.The present invention provides a transmitter for transmitting a multi-carrier signal, in which when generating 128 patterns used to suppress the peak power of 8-bit sub-carrier mapping signals from 7-bit information bits in a encoding unit 9, a sub-carrier generation unit 11, for example, divides the signal point of QPSK modulation into orthogonal groups, generates a sub-carrier mapping signal in which a part of sub-carriers is dependent on the signal point of another sub-carrier and a receiver for receiving such a multi-carrier signal.

The invention discloses an intra-frame prediction mode selection method and an intra-frame prediction mode selection system. The method comprises the following steps of: selecting one of Intra_4*4, Intra_8*8 and Intra_16*16 as an intra-frame prediction type of a current macroblock according to a frequency characteristic of the current macroblock; when the Intra_16*16 is selected, selecting one of intra-frame prediction modes which is selectable for the Intra_16*16 and has the minimum prediction error as the intra-frame prediction mode of the current macroblock; and when the Intra_8*8 or the Intra_4*4 is selected, dividing the current macroblock into four 8*8 pixel matrixes, namely B0, B1, B2 and B3 or 16 4*4 pixel matrixes from D0 to D15; and as to any 8*8 pixel matrix bi or 4*4 pixel matrix Dj, selecting a prediction direction for the pixel matrix Bi or Dj according to the relevance among the pixels in the pixel matrix Bi or Dj, and selecting one of the intra-frame prediction modes which is selectable for the Intra_8*8 or the Intra_4*4 and has the minimum prediction error in the prediction direction for the pixel matrix Bi or Dj as the intra-frame prediction mode of the pixel matrix Bi or Dj.

The invention provides a signal receiving path switching method and a mobile terminal. The method comprises steps as follows: acquiring signal intensity and a first switching threshold value of a downlink signal received through a first receiving path; controlling the mobile terminal to be switched from the first receiving path to a second receiving path when the signal intensity of the downlink signal is smaller than the first switching threshold value and receiving the downlink signal through the second receiving path; a filter is included in the first receiving path, and not included in the second receiving path. With the adoption of the signal receiving path switching method and the mobile terminal, the receiving sensitivity of the downlink signal can be improved, better downlink communication quality can be realized, the code rate is increased, the retransmission rate is reduced, electricity consumed by repeated receiving can be saved, the communication distance can be increased, and the user experience is improved.

The invention discloses a fast screen content coding method based on spatiotemporal correlation. According to the fast screen content encoding method disclosed by the invention, a CU division module based on spatiotemporal correlation firstly calculates an absolute frame difference between a current frame CU and the CU at the same position of a previous frame and divides the CUs into two categories; then the CU division module based on spatiotemporal correlation judges that the current CU terminates division in advance or judges that the current CU only performs PLT mode prediction according to the correlation between the current frame CU and a spatiotemporal adjacent CU of the current frame CU on depths and intra-frame prediction modes; a mode selection module based on spatiotemporal correlation skips a specific prediction mode by means of the mode correlation between the current CU and the spatiotemporal adjacent CU of the current CU; and a CU division module based on coding bits firstly obtains the threshold of a CU coding bit under each depth via a CU hit rate and a curve chart of the coding bits, and terminates the CU division in advance if the coding bit of the current CU issmaller than the threshold. By adoption of the fast screen content coding method disclosed by the invention, the CU division complexity is reduced, the selection process of the intra-frame predictionmodes is simplified, and the SCC coding efficiency is improved.

In the MSN encoded form, the symbols of each block of the present invention define a running digital sum (RDS) value, defined as RDS([a0a1 . . . aN−1])=−Σi(−1)ai where the symbols ai belong to the set {0, 1} and the sum extends for values of i from 0 to N−1. An encoder is configured to satisfy at least one of the following characteristics: a) blocks of symbols with a given length (L) are used for encoding, wherein RDS=RDS0+4.K, where K is an integer, RDS is the said running digital sum, RDS0 is defined as zero for even values of the said length (L), and one for odd values of said length (L), and b) blocks of symbols with a given length (L) are used for MSN coding and encoding is effected by selecting encoded blocks such that the set of running digital sum (RDS) values is the set with the minimum number of elements that satisfy the required rate value, defined as the ratio between the length of the input blocks and the length of the output blocks. A decoder with a simplified trellis structure is used for decoding (as in decoding a digital signal read from media on which the signal in question has been recorded via a vertical or perpendicular magnetic recording technique, for example).

The embodiment of the invention discloses an image processing method and image processing equipment. The method comprises the steps of acquiring a first area needing to be subjected to motion detection in a video frame; when motion occurs, performing region of interest (ROI) coding for improving image resolution of the first area without changing the coding manner of the remaining area in the video frame; after the motion detection is finished, continuously adopting the coding manner of the remaining area to code the first area. The method and the equipment disclosed by the embodiment of the invention can be used for reducing network bandwidth occupancy rate in the process of performing motion detection on video images.

Method for providing steganography in MIDI files. Present invention provides list steganography algorithms and methods for their application to MIDI files. Present invention further provides a 300% increase in average encoding rate and better implementation of stego-keys is achieved over previous MIDI steganography methods.

The invention discloses a mobile video monitoring method, a device and a system, wherein the mobile video monitoring method comprises the following steps of: A, carrying out new information detection on collected current frame video information; B, coding a new information frame when the new information frame exists and obtaining video coding data; and C, obtaining a current frame image after decoding the video coding data. The mobile video monitoring method, the device and the system have the advantages that the new information detection is carried out on the collected video information, thevideo information codes of the new information frame are uploaded only when the new information frame occurs, the coding rate is improved, the uploading data quantity is reduced, more images can be transmitted in a short time, in addition, useful video information can not be lost, and the monitoring effect is not influenced.

The invention provides an image coding method and device, electronic equipment and a storage medium, and relates to the technical field of image processing. The method comprises the steps: acquiring ato-be-coded image and a reference image, wherein the resolution of the reference image is different from that of the to-be-coded image; according to the to-be-coded image and the reference image, determining a frequency category to which each image block in the to-be-coded image belongs, wherein the reference image includes image blocks corresponding to the respective image blocks; and coding theto-be-coded image according to the frequency category to which each image block belongs. The definition of the image can be improved, and the size of the image is reduced.

The invention relates to an ADPCM image compressing method and apparatus. According to the invention, an overflow code encoding strategy is added when a predicted error is big, external quality and active effect of encoded images are markedly improved without increasing encoding rate. In addition, the encoding / decoding process according to the invention are simplified, the compressing complexity of original images is reduced and the encoding performance is improved, thereby, the quality and active effect of the encoded images are markedly improved, the reduction of the complexity of an encoder / decoder is good for application of the algorism in a software ISP.

This invention relates to an error-check and error-correction code circuit for storages and a method for reading and writing data by it taking matrix G as a logic core including: a decoding process and a coding process and a method for writing in data by this method. Apart from a decoding process and an error correction process, it also includes a coding process, and finally puts forward an errorcheck and correction and coding circuit for realizing said two methods including a decoder, an error-correction circuit, a coding circuit, an interface circuit and related data transmission circuit so as to simplify layout of bottom circuit and speed up operation speed of circuits.

The invention discloses an efficient video encoding method based on a vision attention priority. The method is centered on two contents including a vision attention priority annotation based on a movement-texture feature and a high-quality encoding optimization based on the vision attention priority. The method comprises the following steps: firstly, performing the attention annotation and priority judgment on an encoding unit when the movement grading of an encoding object is acted as a leading vision attention feature and texture information of the encoding object is acted as an auxiliary vision attention feature; and secondly, performing self-adaptive encoding conversion coefficient regulation to realize difference encoding aiming at regions in different attentions, and guaranteeing more optimal subjective vision quality under the same code rate.

The invention discloses a high-parameter coded anti-violence lock cylinder, which includes a lock cylinder rotor, a lock cylinder stator and a coding key matched with the lock cylinder rotor. The core rotor is provided with at least two rows of at least 4 stepped marble holes in each row, and coding marbles are installed in the stepped marble holes. Insert a positioning pin into the positioning hole of the lock cylinder to form a lock cylinder that can be set to turn at least 90 degrees on the lock cylinder rotor, and install stop pins, return springs, and spring covers into the corresponding intercommunicated pin holes on the lock cylinder stator. Coded key, combined into a complete high-parameter coded anti-violence lock cylinder. The high-parameter coded anti-riot lock cylinder is used for anti-theft locks for various purposes; such as residential, office, factory, warehouse, workshop, hotel, shop, automobile, motorcycle, electric vehicle lock, etc.

The invention provides a voice coding control method and device, and a storage medium. Sound mixing processing is performed on call audios provided by each call terminal in a multi-person call scene to obtain a sound mixing result, the listening sense contribution degree of each call terminal to the sound mixing result is calculated, the target coding parameter of each call terminal is determinedaccording to the listening sense contribution degree, and the target coding parameter is returned to the corresponding call terminal. And each call terminal is enabled to adjust the current coding parameter according to the target coding parameter. According to the method, the coding parameters of each call terminal are dynamically adjusted based on the listening sense contribution degree of eachcall terminal to the mixed audio in the multi-person call scene, so that the subjective listening sense of the user is improved while the network bandwidth is saved.

The invention discloses a code word design method for DNA storage, which specifically comprises the following steps of: converting storage information into a DNA sequence, firstly converting the information into binary data, secondly, constructing a minimum variance Huffman tree, and compressing binary data by using the minimum variance Huffman tree, then, performing non-overlapping partitioning on the compressed binary data by taking 4 bits as a group to obtain at most 16 combinations, and sequentially selecting code words from the dictionary according to the probability of the combinations for mapping to obtain a DNA sequence, finally, obtaining the GC content of the DNA sequence, and if the GC content is higher than 60% or lower than 40%, adjusting the mapping relation to range from 40% to 60%, and further checking whether the DNA sequence contains more than 3 homopolymers, and if so, carrying out replacement and modification. The method has the characteristics of high coding rate and simple structure, and the coded DNA sequence also meets the constraint conditions that the GC content is between 40% and 60% and the running length of the homopolymer does not exceed 3.

The invention discloses a method for increasing a coding rate of a TLC flash. The method is characterized in that when an erasure frequency of a Block is smaller than a preset erasure inflection pointfrequency PE_tr, BCH is selected as a BER error correction algorithm of the Block; and when the erasure frequency of the Block is not smaller than the preset erasure inflection point frequency PE_tr,LDPC is selected as the BER error correction algorithm of the Block. By dynamically adjusting an error correction algorithm strategy in a life cycle of TLC NAND, namely, dynamically adjusting check data size, the coding rate of the TLC flash is expectedly improved on the whole.

The invention discloses a flat key and a locking machine, comprising a flat key, a shell and a rotatable lock core in the shell. A bending guide groove is formed on a flat surface on at least one lateral surface of the flat key; identification points are distributed along the guide groove; a sliding block is arranged in the lock core; guide posts matched with the guide grooves are arranged on the surface relative to the key of the sliding block; the inner wall of the shell is provided with a pair of grooves corresponding to each sliding block; two grooves in each pair of grooves are respectively positioned at two ends of the sliding block; one sliding block in two end parts of the sliding block enters the groove of the shell in the locked state; during unlocking, the sliding block is driven by pushing the guide posts through the key to move, so that the sliding block is positioned at the unlocking position in the middle of two grooves, both two end parts of the sliding block are positioned outside the grooves and the lock between the lock core and the shell can be removed; and a return spring for pushing the sliding block to leave from the unlocking position is arranged between the sliding block and the lock core. The flat key and the locking machine have the advantages of simple structure, high production efficiency, high code rate, safety and reliability.

The invention discloses a method for improving the encoding rate of flash memory and flash memory, which is characterized in that flash memory of the same batch or similar performance is extracted for durability test, and the data distribution data of BER of each page of the flash memory is obtained statistically, and the page is divided according to BER It is divided into K categories, K>2, and the maximum BER value of each category is used as the typical BER value of each category, and the recommended value of the page verification data size of each category is obtained according to the typical BER value. By using the machine learning algorithm to classify the BER values ​​of all pages, and formulating a BER value for each type of page, it is expected to reduce the BER value of the flash memory as a whole, that is, to increase the coding rate of the flash memory as a whole. At the same time, the K-means clustering algorithm can flexibly select the K (category number) value. The firmware of the solid-state hard disk only needs to record the typical BER value of K categories or the size of the verification data, and hardly occupies RAM space.

The invention discloses a cloud-containing remote sensing image compression method based on a quantization strategy, and mainly solves the problems that in the prior art, surface feature information of a thin cloud coverage area cannot be kept, and coding consumption is large. According to the scheme, the method comprises the steps: expanding the boundaries of a cloud-containing remote sensing image and a cloud mask image, and performing downsampling and interpolation on a cloud area; calculating an approximate median of a region of interest of the cloud-containing remote sensing image; obtaining gray masks marked with different cloud areas and gray images marked with inner and outer edges of the different cloud areas; quantizing the cloud area of the cloud-containing remote sensing imageaccording to the cloud mask image; carrying out boundary smoothing on the quantized image of the cloud area in combination with the gray images of the inner edge and the outer edge of the cloud area;subtracting a median from the values of all the pixel points in the smoothed image, performing compressed coding, and sending a code stream to a receiving end; and by the receiving end, decoding the code stream to obtain a recovered image. Coding consumption is reduced, information of a thin cloud coverage area can be partially reserved, and the method can be used for transmission of cloud-containing images.

The invention discloses a light field focus stack image sequence encoding and decoding method, device and system. Since there is a great correlation between each frame of the focus stack image, only the in-focus area and the out-of-focus blur area are different between each frame. By applying Gaussian filtering to the in-focus area, the out-of-focus blurred areas of other frames can be simulated. The present invention traverses the predicted motion vector candidate list, takes the position indicated by the predicted motion vector with the smallest distortion cost as the starting point, sequentially performs integer pixel search and cascaded sub-pixel search, and performs a search for each matching block in the search process. Gaussian filtering, compare the rate-distortion cost of the matching block before and after Gaussian filtering, select the optimal matching block with a smaller rate-distortion cost, apply Gaussian filtering to the inter-frame prediction model, effectively reduce the prediction unit and The residual distribution of the coding unit effectively saves the code rate and the coding efficiency is high.