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60results about How to "Avoid coding" patented technology

Method and system for entropy coding for scalable video codec

A method, program product and apparatus for encoding a scalable bit stream from the binarization results of a video sequence by selectively encoding syntax elements and avoiding redundancy in coding. The result is a decrease in the size of the compressed bit stream of an enhancement layer. One method includes determining whether a skipping flag in the base layer macro block of the video data is set, and encoding an enhancement layer macro block of the video data, corresponding to the base layer macro block, with a skipping flag only if the base layer macro block skipping flag is set. Another method includes determining which of a plurality of blocks in a base layer macro block contain zero coefficients, generating a coded block pattern (CBP) of an enhancement layer macro block, where the CBP includes a number of digits equal to the number of blocks in said base layer macro block containing only zero coefficients, and then encoding the CBP of the enhancement layer. Yet another method includes encoding a CBP value of a base layer macro block and differentially encoding a CBP value of an enhancement layer macro block relative to the CBP of the base layer macro block. An additional method includes determining the zero-value coefficients in a block of a base layer, determining whether any of the zero-coefficients become non-zero coefficients in a corresponding block in an enhancement layer, and encoding a coding block flag in an enhancement layer based on that determination.
Owner:NOKIA CORP

Video processing method and device, electronic equipment and storage medium

The embodiment of the invention provides a video processing method and device, electronic equipment and a storage medium. The invention discloses a video processing method. The method comprises the following steps: encoding a microphone-connected video stream currently generated by a video playing terminal into an IDR encoded image group; sending to a microphone-connected video playing end; then,according to a coding rule that the IDR frame interval is a plurality of LTR frame intervals; and the currently generated microphone-connected video stream is acquired again, encoded into a pluralityof LTR encoded image groups and sent to the microphone-connected video playing end in sequence, and the first frame of each LTR encoded image group is formed by encoding a preceding IDR frame or a preceding LTR frame. According to the invention, the LTR frame is used for replacing the frame which should be coded into the IDR frame, the original IDR frame interval is expanded, the frequent coding of the IDR frame is avoided, the coding efficiency of the microphone-connected video stream is improved, the quality of the microphone-connected video stream played by the microphone-connected video playing end is further improved, and the experience of the microphone-connected video of a user is effectively improved.
Owner:BEIJING DAJIA INTERNET INFORMATION TECH CO LTD

Video structured processing method and apparatus, and terminal device

The invention is suitable for the technical field of video processing, and provides a video structured processing method and device, terminal equipment and a storage medium, and the method comprises the steps: respectively caching each frame of image in first N frames of images of a video stream to a cache block, and obtaining a cache address of each frame of image in a first cache region; according to the cache address of each frame of image in the first cache region, sequentially reading the images from the first cache region according to a preset frame number sequence, and performing structured processing; respectively detecting whether the image cached in each cache block is invalid or not according to the structured processing progress; when a failed image is detected, clearing the failed image, and caching a frame of new image in the cache block corresponding to the failed image. According to the method, the cache can be released in time when the invalid image is detected, the invalid image is removed, and a frame of new image can be cached after the cache is released, so the use efficiency of the cache is improved, the image is not easy to lose, and the efficiency of video structured analysis processing is improved.
Owner:SHENZHEN INTELLIFUSION TECHNOLOGIES CO LTD

Pattern-based time division duplex/time division multiple access channel planning frame coding method

The invention discloses a pattern-based time division duplex/time division multiple access channel planning frame coding method, which mainly solves the problem of low coding efficiency of a conventional channel planning frame coding method. The method comprises the following steps of: (1) setting network nodes; (2) dividing a planning cycle; (3) distributing time slots in the planning cycle by a central node to obtain a distribution result of the time slots in the planning cycle; (4) generating uplink and downlink node patterns according to the time slot distribution result; (5) defining P code words according to the purposes of the time slots, and coding the P code words; and (6) generating uplink and downlink time slot mapping patterns according to the time slot distribution result, and combining the uplink and downlink node patterns with the uplink and downlink time slot patterns to complete planning frame coding. The method has the advantages of low planning frame coding length, low overhead of transmission of planning frames in a channel, high utilization rate of the channel and low requirement on equipment, and can be applied to the field of various local area networks and access networks adopting time division duplex/time division multiple access communication.
Owner:BEIJING HANNUO TECH

Color image encryption method based on new four-dimensional hyperchaos and DNA random coding calculation

PendingCN113077374AGuaranteed PseudorandomnessIncrease scramblingDigital data protectionChaos modelsPlaintextKey space
The invention provides a color image encryption method based on new four-dimensional hyper-chaos and DNA random coding calculation, aiming at the problems that static DNA coding and calculation rules are single, an encryption process is separated from a plaintext, and the encryption process is easily broken by the plaintext. The method comprises the following steps: firstly, designing a new four-dimensional hyper-chaotic system, generating a plurality of pseudo-random sequences by an iteration system, calculating and correcting the pseudo-random sequences to generate a new pseudo-random sequence and a matrix, decomposing a color image into R, G and B channel components, and fusing the R, G and B channel components into a matrix; then carrying out DNA random coding and DNA random calculation on an image and a pseudo-random matrix according to a newly generated pseudo-random sequence, carrying out scrambling and DNA random decoding related to a DNA-level plaintext, then decomposing the matrix into channel components, carrying out fusion to generate a final ciphertext image, wherein an initial value of a chaotic system is obtained by calculating the plaintext through an SHA-512 algorithm. The encryption method provided by the invention is not only large in key space and high in plaintext sensitivity, but also capable of effectively resisting statistical, violent and differential attacks and the like.
Owner:HARBIN INST OF TECH AT WEIHAI

Simple, efficient and real-time transgenic product detecting method and application thereof

The invention relates to a simple, efficient and real-time transgenic product detecting method and application thereof. The transgenic product detecting method sequentially comprises the steps that tissue processing is performed, wherein an appropriate number of samples of tissues of agricultural and pastoral plants or animals is taken, ground and homogenized; nucleic acid extraction is performed,wherein a paramagnetic particle method is adopted to perform nucleic acid extraction; targets DNA are captured, denaturating treatment is conducted on extracted nucleic acid, then specificity is utilized to design a transgene capture and extraction chip for a general component for target exogenous genes and / or transgenes generally transformed in the transgene field, and then target genes are captured, extracted and enriched; single molecule sequencing is performed, wherein genetic information of the detected samples is obtained by using a nanopore single molecule sequencing method; result analysis is performed. The simple, efficient and real-time transgenic product detecting method can simply and efficiently achieve detection of transgenic products in real time, the whole process is completed in a full-automatic 'simpleton' way, and accordingly non-professional common practitioners / consumers can also achieve detection of transgenic products.
Owner:栾图
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