158 results about "Fast mode" patented technology

The present invention discloses a method (400) and apparatus for AVC intra prediction for encoding digital video comprising multiple images. The method includes the following steps: generating (410) edge direction information for each intra-frame coding block of the digital image; selecting (420) the most likely intra-frame prediction mode according to the generated edge direction information for rate-distortion optimization. The above-mentioned edge direction information can be generated by applying at least one edge operator to the digital image. The edge direction histogram can be used to accumulate the magnitudes of pixels in 15 directions within the coding block. The method may further comprise the step of intra-coding (430) a block of the digital image with the selected most likely intra-frame prediction mode.

A video encoder and corresponding methods are provided for selecting the mode of a current macroblock of an inter-coded frame, including one or more of checking first modes for a subset of macroblock modes, selectively checking other modes in response to motion vector information of the checked first modes, and selecting the mode for the current macroblock in response to the checked modes; checking the macroblock mode of at least one neighboring macroblock, and selecting the mode for the current macroblock in response to the macroblock mode of the at least one checked neighboring macroblock; checking the cost of a subset of macroblock modes, further checking only intra-coded modes if the checked cost meets a preset criteria, and selecting the mode for the current macroblock in response to the checked modes; and adjusting an early-stopping threshold in response to checked macroblock modes, and selecting the mode for the current macroblock in response to the checked macroblock modes if the adjusted early-stopping threshold is met.

An encoder achieves improved encoding efficiency by initially limiting consideration of the potential modes (block sizes) to a prescribed sub-set and by performing mode estimation jointly with mode decision-making. An initial sub-set of modes is considered and an estimation of the motion for each block in the sub-set is made to establish a best motion vector. A distortion measure is also made for each sub-set. From the distortion measure, a determination is made whether or not to estimate the motion for other block sizes. If not, then an encoding mode is chosen in accordance with the estimated motion. In this way, motion estimation on all possible block sizes need not be undertaken.

Disclosed are program and read methods for a nonvolatile memory system, including determining to program first data in which one of fast and normal modes; providing the first data with an error code generated by a multi-bit ECC engine, in the fast mode, and generating second data; programming the second data in a cell array by a program voltage having a second start level higher than a first start level; and reading the second data from the cell array, the second data being output after processed by the multi-bit ECC engine that detects and corrects an error from the second data.

There is disclosed a video encoder and corresponding method for encoding video data for an image block. The video encoder performs a mode decision by performing initial motion estimation on only a subset of possible block sizes to output motion information corresponding thereto, and determining, based upon the motion information corresponding to only the subset of possible of block sizes and upon other image-related analysis data, whether other block sizes are to be evaluated.

A DLL circuit having a low jitter in a semiconductor device, includes a delay model unit for compensating a time difference between an external clock signal and an internal clock signals and generating a compensation signal; an input buffer for receiving a reference clock signal and an inverted clock signal, and for outputting a clock signal and an inverted clock signal activated at each edges of the reference clock signal and the inverted clock signal; a phase detection unit for generating a comparison signal by comparing the compensation signal with the inverted clock signal, and for outputting the comparison signal with a normal mode or a fast mode; a control unit for generating a plurality of control signals by receiving the comparison signal, the inverted clock signal and the clock signal; a delay unit for delaying in response to the plurality of control signals; and an output buffer for outputting a delayed clock signal by receiving an output signal of the duty corrector.

The invention discloses a quick mode selection method and a device of an H264 video coding. The method comprises the selection of a mode in frames and the selection of the mode between the frames, wherein, for the selection of the mode in the frames, a prediction method with different fineness is chosen according to the dramatic degree of the image information changes in the prior macro block, thereby decreasing the number of the model to be chosen and confirming the final selection mode through the method of code rate-distortion factor optimizing; for the selection of the mode between the frames, the sum of the absolute difference of the corresponding pixel point of the corresponding macro block of the prior frame and the reference frame is used as a dividing basis to divide the macro block into different fineness and to correspondingly choose a prediction method with different fineness for decreasing the number of the model to be chosen and confirming the final selection mode through the method of code rate-distortion factor optimizing. The invention can decrease the number of the model to be chosen and solve the application limited problems caused by over-complicated code, over-loaded operation and over time consumption in the prior art.

Disclosed are program and read methods for a nonvolatile memory system, including determining to program first data in which one of fast and normal modes; providing the first data with an error code generated by a multi-bit ECC engine, in the fast mode, and generating second data; programming the second data in a cell array by a program voltage having a second start level higher than a first start level; and reading the second data from the cell array, the second data being output after processed by the multi-bit ECC engine that detects and corrects an error from the second data.

Methods for fast mode decision of variable size block coding referring to spatial and temporal correlations between a current encoding motion block and at least one reference motion block to decide a best mode for encoding the current encoding motion block. The at least one reference motion block includes at least one neighboring motion block of the current motion block and / or a previous motion block that is located in a previous image frame at a position corresponding to that of the current encoding motion block in a current image frame. At least one block size mode is obtained from the at least one reference motion block. The methods further check the reliability of the at least one block size mode before using the at least one block size to encode the current motion block.

The invention discloses a method for dividing and quickly encoding screen contents and natural contents. The encoding method comprises the following steps: distinguishing the natural contents and the screen contents of encoding units according to spatial correlation and statistical characteristics; performing quick mode selection on the natural content encoding unit through a flag bit flagskip formula; performing quick depth judgment on the natural content encoding unit through an optimal depth formula of the current encoding unit; and selecting a depth and a mode having the minimum RD price through a rate distortion optimization process to perform encoding. According to the method disclosed by the invention, the difference between the screen contents and the natural contents is fully considered, and unnecessary modes and depth traversal are conditionally skipped in combination with the own characteristics of the natural contents, thereby realizing quick encoding of the screen contents and shortening the overall encoding time.

An electronic device includes a micro control unit (MCU), a non-volatile random access memory (NVRAM), and a watch dog. The electronic device detects a standby instruction and then enters a standby mode according to the standby instruction. A boot loader stored in the NVRAM boots the electronic device when the MCU detects a starting instruction. The electronic device triggers the watch dog to time a preset period when the boot loader boots the electronic device and boots up with a fast mode. The electronic device determines if the watch dog times out, and boots up with a normal mode when the electronic device does not boot up with the fast mode before the watch dog times out.

The invention discloses a spatial enhancement layer rapid mode selection method of scalable video coding. If the optimal mode of a macro block corresponding to a spatial basic layer of a current coding macro block is intra-frame mode, the current coding macro block selects the intra-frame mode as a candidate mode sub-set of the current coding macro block. If the optimal mode of the macro block corresponding to the spatial basic layer of the current coding macro block is inter-frame mode, the rate distortion cost threshold of the early skip of the Skip mode of the current coding macro block is calculated; if the rate distortion cost of the Skip mode of the current coding macro block is less than the rate distortion cost threshold, the Skip mode is selected as the optimal mode of the current coding macro block; and otherwise, the mode quality of the current coding macro block is calculated, and the candidate mode sub-set of the current coding macro block is selected according to the mode quality of the current coding macro block and the mode quality threshold under the current coding parameter maintained by a coder. Through the invention, the number of the coding modes for calculating the rate distortion cost is reduced, and the coding time is shortened.

The present invention discloses a non-contact measurement system for measuring the three-dimensional (3D) shape of an object rapidly by using a unique light pattern and the implementation method thereof. The system comprises a pattern generation unit, a projection unit, a sensing unit and a processing unit. The pattern generation unit generates an enhanced color sequence according to predetermined rules. The sensing unit of the system comprises a hybrid sensor which can be operated in fast mode or precise mode. A dedicated decoding method for the present invention is also disclosed.

A module enabling user to self-set sound control function to be shortcut mode consists of sound control function databank as each sound control function being formed by sound control command name, sound control function shortcut mode and selection mark number. It is featured as converting voice command to be electronic data by electronic unit when voice command is inputted by user, comparing electronic data with sound control command name to find out proper sound control command option and executing sound control item according to relevant sound control function shortcut mode.

The invention discloses an intra-frame prediction fast mode selecting method based on an autoregressive model in the video standard to mainly solve the problem of high selection complexity in an intra-frame prediction mode in the H.265 / HEVC standard. The method comprises the step of carrying out the rough code selection on a current prediction unit to obtain m candidate modes, the step of adding a most possible mode to obtain m1 candidate modes, the step of carrying out ascending sort on cost function values of the m1 candidate modes, and the step of comparing the difference value of two adjacent cost values, the specific value of the average value of the two adjacent cost values and a threshold value obtained based on the autoregressive model to select n ultimate candidate modes in a self-adaptation mode to carry out rate-distortion optimization. The method is easy to operate, the compression performance of an image is kept, running time is shortened, a technical basis is provided for achievement of the H.265 / HEVC standard, and the method can be used in all intra-frame prediction mode selections in a video compression encoding terminal based on the H.265 / HEVC standard.

The invention provides a rapid mode decision method specific to the problem of AVS2 inter-frame coding complexity. The method comprises the following steps: during inter-frame coding, calculating texture complexities in a horizontal direction and a vertical direction of a coding block firstly, calculating a horizontal symmetrical division mode (HOR_SYM) if the texture complexity in the horizontal direction is lower, otherwise calculating a vertical symmetrical mode (VER_SYM); meanwhile, using a prediction mode of an optimal reference block as a reference to avoid wrong judgment due to external factors; and if the horizontal symmetrical or vertical symmetrical mode is a current optimal mode, further analyzing the texture of a prediction unit (PU) in a horizontal asymmetrical or vertical asymmetrical mode, and choosing whether to perform calculations of the asymmetrical modes or not according to texture features. Through adoption of the method, calculations of five modes can be reduced at most; calculations of three modes can be reduced at least; the coding complexity can be lowered remarkably; and meanwhile only little coding performance is lost.

The invention relates to a frequency adjusting and control method for a variable-frequency enhanced vapor injection heat-pump water heater. The frequency adjusting and control method is characterized by comprising the adjusting steps that a, when a user selects a fast mode, the heat-pump water heater detects outdoor environment temperature T1 and the actual temperature T2 of a water tank, and the frequency of a compressor is adjusted with the actual temperature T2 of the water tank as a feedback object; b, when the user selects an energy saving mode, a controller detects the current actual temperature T2 of the water tank, and the needed total quantity of heat production within water using time t is calculated; c, when the heat-pump water heater works according to the frequency adjusting method of the step a and the step b, the opening degree of a main electronic expansion valve and an auxiliary electronic expansion valve is adjusted with the optimum energy efficiency ratio according to the compressor frequency, the outdoor environment temperature T1 and the water tank actual temperature T2 obtained through the experiment; d, the highest frequency allowed by the heat-pump water heater can be determined through an experiment method, and is preset in the controller in a functional expression or list mode. The frequency adjusting and control method has the advantages that that the variable-frequency enhanced vapor injection heat-pump water heater is made to work at the frequency close to the optimum energy efficiency ratio frequency point as much as possible, the opening degree of the main electronic expansion valve and the auxiliary electronic expansion valve is controlled with the optimum energy efficiency ratio, and energy is saved.

The present invention provides a hardware accelerator, which allows faster switching between processing modes. In an information processing device with a bytecode accelerator BCA for translating a stack-based intermediate code (bytecode) into register-based instructions, a selector SEL for switching between BCA and soft VM is posed between an instruction part FET and a decode part DEC and data transfer paths P4 and P5 are formed between BCA and the register file REG_FILE. When bytecode accelerator BCA is activated, the P3 side is selected by the selector SEL and the translated CPU instructions are transferred to the decode part DEC. If the intermediate language code cannot be translated by the BCA, the processing mode is switched to software processing. During switching between the modes, internal information of BCA can be transferred between BCA and REG_FILE in parallel, achieving faster mode switching.

This invention discloses an intra-frame coding method based on airspace decomposition. The method comprises decomposing I frame into a basic sub-frame and three predication sub-frames, and encoding the four sub-frames orderly, using a quick mode selection algorithm for the base sub-frame to carryout the sub-frame predication, carrying out the sub-frame compensation according to the selected optimum mode, taking the reestablished sub-frame as a reference frame, carrying out the predication and compensation among the sub-frames for the predicated sub-frames, synthesizing the reestablished sub-frames of the four sub-frames, forming the reestablished frame of the I frame. The result of the experiment indicates that the perceived quality of the reestablished frame is better than that of the reestablished frame of the recommended algorithm in the H.264 reference software JM9 when PSNR values are identical.

A power supply programmable for a constant current mode and a constant voltage mode and selectively operable in either mode. Respective circuits associated with each of a constant voltage loop and a constant current loop track a control voltage of the other loop when the other loop is operating closed loop and maintains a control voltage of the open loop at a tracking offset value from the control voltage of the closed loop, allowing the open loop to rapidly assume control of the power supply during a mode transition. The tracking offset value is briefly increased during a mode transition to interrupt oscillation tendencies, resulting in faster mode cross-over and reduced overshoots, while maintaining stability.

The present invention discloses a Hadamard transform-based fast intra-prediction mode selection and PU partition method, including: 1. according to complex conditions of image texture, reducing the amount of computation and traversing PU; 2. performing Hadamard transform on a current PU block, to obtain the complexity of the current PU block; 3. judging whether the texture of the current PU block is complicated according to the complexity of the current PU block as the metric of the image texture; 4. if the texture of the current PU block is complicated, for the PU, traversing 4*4 partition modes; and for mode selection, traversing 35 candidate modes; and 5. if the current PU block is gentle and smooth, for the PU, partitioning into large pieces more probably without traversing 4*4 partition modes; and for mode selection, traversing few candidate modes only. The method disclosed by the present invention reduces a lot of amount of computation, and greatly reduces the coding time with performance reduction within the acceptable range, thereby improving the timeliness of HM.

A method of fast mode decision of an enhancement layer using a bitrate-distortion cost in an SVC encoder includes: calculating a bitrate-distortion cost for a current macro block of an enhancement layer and a bitrate-distortion cost for a previous macro-block of the current macro block of an enhancement layer based on an optimal motion mode and an motion vector for a macro block of a base layer of a current frame; correcting the bitrate-distortion cost for the previous macro block calculated at the calculating by a correction value for reflecting relationship with the previous frame to calculate a final bitrate-distortion cost for the previous macro block; and comparing the bitrate-distortion cost for the current macro block calculated at the calculating with the final bitrate-distortion cost calculated at the correcting and selecting a motion mode that will be removed from the current macro block according to the comparison result.

<heading lvl="0">Abstract of Disclosure< / heading> An optical signal amplifier comprises a light source, a depolarizer, and a gain medium that transfers energy from a pump beam output from the depolarizer to the optical signal. The depolarizer may comprise one or more birefringent optical fibers which support two polarization modes, a fast mode and a slow mode. The light propagates in the fast mode at a higher velocity than the light propagates in the slow mode so as to impart phase delay as the light propagates in the birefringent optical fibers, thereby at least partially depolarizing the beam.

The invention discloses an interframe predication quick mode selecting method for high-performance video coding. The method comprises the steps of conducting SKIP mode and Inter2Nx2N mode verification on each coding unit (CU) in video frames, judging whether the SKIP mode is a current optimized mode or not if the error of the rebuilt pixel and the original pixel value of each CU unit does not surpass a threshold, or the error of the rebuilt pixel and the original pixel value is distributed in a preset range or predicted residuals do not surpass preset numerical value, judging the SKIP mode as the optimized mode of the current CU if SKIP mode is the current optimized mode, otherwise, judging whether the the current CU is a smallest coding unit (SCU) or not, conducting four quad tree based segmentation on the current CU if the current CU is not an SCU, and conducting mode verification on sub-units one by one. The method effectively reduces coding complexity of a coding side so as to be adapted to mobile equipment and much video application high in real-time requirement.

The invention discloses an H.264 / AVC high-efficiency transcoder based on fast mode judgment, belonging to the technical field of network communication, and mainly solving the defects of high computation complexity and bad instantaneity in the existing transcoding method. The transcoder consists of a decoder, a fast mode judger and a coder. The decoder transmits a macro block mode, a motion vector and a residual image to the fast mode judger and transmits a decoded frame image to the coder; the fast mode judger fast judges the mode of the decoded frame image to obtain a new macro block mode according to the information transmitted by the decoder and a reference frame image transmitted by the coder, and transmits the new macro block mode to the coder; and the coder codes the decoding frame image transmitted by he decoder according to the information which is transmitted by the fast mode judger to obtain the established code stream of target bitrate. The H.264 / AVC high-efficiency transcoder greatly reduces the transcoding computation complexity, reduces the transcoding time, and can be used for immediately transmitting the multi-media data and the other data.

The invention discloses a coding method for multi-view depth video signals, the coding method is used for drawing redundancy, lowering the calculating complexity of depth video coding and improving the integral performance between the virtual view quality and the depth code rate and is low in complexity. Firstly, according to the virtual view drawing characteristics, the depth tolerable range is obtained, the maximum upper and lower limit differences corresponding to depth values are worked out, and redundancy information in the depth video is analyzed; secondly, a rapid reference frame selection method is put forward, an optimal reference frame is selected from a list, and an optimal coding mode is selected through the rapid mode. The rapid reference frame selection needs to be carried out before rapid mode selection every time, and when the distortion of the video is small by setting the threshold value T1 and the threshold value T2, the mode and reference frame selection is ended, and therefore the calculating complexity is lowered, and the compression performance is improved.

The invention discloses a multi-axis synchronous track planning method and system and a computer readable storage medium. The method comprises the steps that according to the initial and final speedsand displacements of all coordinate axes, the single axis planning is conducted on all the coordinate axes, the required time of meeting the initial and final speeds and the displacements is calculated, and the longest time is taken as the reference time to conduct synchronous planning on other axes; if the synchronization conducted on some axis fails, replanning is conducted on the axis; if the synchronization conducted on some axis succeeds, the axis which requires the longest time is subjected to the single axis planning, and synchronous planning is conducted on other axes. In the process of resynchronizing other axes, if the synchronization conducted on some axis still fails, the last step is repeated until the synchronization is conducted on all the axes successfully. By the means ofthe method, it is achieved that the displacement and the speed are synchronous, and the constant accelerated speed is utilized for accelerating or reducing the final speed in a fastest mode to make the speed meet the requirements, it is ensured that the motion time is short as far as possible, and the stability in the motion process is improved.

Methods and apparatus are presented for reducing the computational complexity of coding mode decisions by exploiting the correlations across spatially and / or temporally close coding mode decisions. A mode decision for a current macroblock is based on the mode decisions of spatially and / or temporarily close macroblocks.