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1613 results about "Low complexity" patented technology

Low complexity. medical decision - making. Low Complexity Medical Decision-Making requires only slightly more intellectual energy than straightforward MDM. The acuity of care remains minimal. For example, this level of MDM is required for a level 3 office visit (99213) or a level 3 office consult (99243).

Method and Apparatus of Transform Unit Partition with Reduced Complexity

ActiveUS20120230411A1Reduced encoding computational complexitySmall motion estimation costColor television with pulse code modulationColor television with bandwidth reductionRound complexityMotion vector
Three block concepts are introduced in HEVC: coding unit (CU), prediction unit (PU), and transform unit (TU). The overall coding structure is characterized by the various sizes of CU, PU and TU in a recursive fashion. For transform processing in current HEVC, a hierarchy RQT (Residual Quad Tree) is used and the TU size is related to the CU size, but independent of the PU size. This results in high encoding complexity and also causes increased processing time to process the syntax of residual quad tree. Accordingly a modified transform unit partition with reduced complexity is disclosed. According to an embodiment, the TU size may be restricted to the minimum of PU width and height, except for a 2N×2N coding unit with the 2N×2N partition type. In another embodiment, the maximum TU size equals to maximum of PU width and height, and the minimum TU size equals to minimum of the PU width and height, except for a 2N×2N coding unit with the 2N×2N partition type. In yet another embodiment, the TU size is selected between 2N×2N and N×N for the 2N×2N, 2N×N, N×2N and N×N partition types. The syntax element, split_transform_flag, is used to indicate the selection of 2N×2N or N×N TU size when needed. Furthermore, a method with reduced complexity of selecting the best merge candidate for the 2N×2N CU merge mode is disclosed. The method relies on R-D cost associated with the motion vector of merge candidate to reduce required computation.

Prototype waveform phase modeling for a frequency domain interpolative speech codec system

A system and method is provided that employs a frequency domain interpolative CODEC system for low bit rate coding of speech which comprises a linear prediction (LP) front end adapted to process an input signal that provides LP parameters which are quantized and encoded over predetermined intervals and used to compute a LP residual signal. An open loop pitch estimator adapted to process the LP residual signal, a pitch quantizer, and a pitch interpolator and provide a pitch contour within the predetermined intervals is also provided. Also provided is a signal processor responsive to the LP residual signal and the pitch contour and adapted to perform the following: provide a voicing measure, where the voicing measure characterizes a degree of voicing of the input speech signal and is derived from several input parameters that are correlated to degrees of periodicity of the signal over the predetermined intervals; extract a prototype waveform (PW) from the LP residual and the open loop pitch contour for a number of equal sub-intervals within the predetermined intervals; normalize the PW by a gain value of the PW; encode a magnitude of the PW; and separate stationary and nonstationary components of the PW using a low complexity alignment process and a filtering process that introduce no delay. The ratio of the energy of the nonstationary component of the PW to that of the stationary component of the PW is averaged across 5 subbands to compute the nonstationarity measure as a frequency dependent vector entity. A measure of the degree of voicing of the residual is also computed using openloop pitchgain, pitch variance, relative signal power, PW correlation and PW nonstationarity in low frequency subbands. The nonstationarity measure and voicing measure are encoded using a 6-bit spectrally weighted vector quantization scheme using a codebook partitioned based on a voiced/unvoiced decision. At the decoder, a stationary component of PW is reconstructed as a weighted combination of the previous PW phase vector, a random phase perturbation and a fixed phase vector obtained from a voiced pitch pulse.

JPEG2000 self-adapted rate control system and method based on pre-allocated code rate

InactiveCN101106711AAccurate code rate pre-allocationPre-allocated precisionTelevision systemsDigital video signal modificationCoding blockControl system
The invention discloses a JPEG2000 self-adapting rate control system and a method based on pre-assignment of code rate, mainly solving the problem of large calculation amount and large memory size of JPEG2000 encoding method. The code block of the original image after pretreatment, wavelet transformation and quantification is output by two lines, one line directly enters the bit plane and MQ coder; for the other line, the entropy of each code block is estimated by the entropy estimate module, sent to the code rate assignment module to assign code rate, and the code rate of each code block is feed back to the bit plane and MQ coder through the encoding depth control module, after the code blocks are encoded by the bit plane, further feed back to the encoding depth control module to determine the output code stream of each encoded code block, and the output code stream is under optimal interception and code stream organization to output the ultimate code stream. At the same time, the invention can change the threshold value of the encoding depth control coefficient as required, to flexibly control the encoding depth in order to improve the image compression quality. The invention has the advantages of low complexity and easiness for hardware implementation, and is suitable for various JPEG2000 image real-time compression systems.

Method and system for joint resource allocation and computing unloading in software defined vehicle-mounted edge network

The invention discloses a method and a system for joint resource allocation and computing unloading in a software defined vehicle-mounted edge network. The method comprises the following steps: establishing a mathematical model of a wireless communication theory according to data information, and modeling a joint resource allocation and calculation unloading problem as a mixed integer nonlinear programming problem (MINLP) according to the mathematical model; decomposing an original problem into a resource allocation sub-problem and a calculation unloading sub-problem through a Tammer decomposition method, and adopting function monotonicity definition, Lagrangian duality and KKT (Karush-Kahn-Tucker) to obtain optimal resource distribution, and obtaining an optimal unloading strategy by adopting a multi-stage low-complexity heuristic algorithm; wherein the server can allocate computing resources to the vehicle according to the scheme of the controller, and the vehicle selects the serverto unload the computing task according to the strategy of the controller. According to the invention, an optimal unloading strategy and an optimal resource allocation scheme are provided for vehicles,and the total processing delay of vehicle-mounted tasks in a system range is reduced.
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