140 results about "Sequence selection" patented technology

A digitally encoded video fingerprinting system for generating and comparing/matching finger-prints from digitally encoded video which has been encoded according to an encoding method which involves the generation of residual macroblocks of pixels and the generation of quantized transform coefficients of the residual macroblocks, or of portions of the residual macroblocks, comprises a fingerprint database (5) and a video processing subsystem (10). The video processing subsystem (10) includes a fingerprint sequence selection module (14, 24) which is operable to select one or more sets of frames from input video content to be processed in order to generate a fingerprint; a fingerprint calculation module (14, 26) which is operable to generate a fingerprint based on a set of frames selected by the fingerprint sequence selection module; and a fingerprint comparator module (14, 28) which is operable to compare two fingerprints and to output a similarity score of the compared fingerprints. The method used by the fingerprint selection and fingerprint calculation modules includes selecting a group of frames of the encoded video content; processing the digitally encoded video content to obtain a set of quantized transform coefficients of residual macroblocks or portions of residual macroblocks associated with each of the selected frames; identifying a set of residual macroblocks per frame whose transform coefficients satisfy a threshold criterion; and generating a digital video fingerprint for the encoded video content in dependence upon the identified macroblocks or some property thereof within each of the selected frames.

A high-speed maximum likelihood sequence estimation method and device. The method includes identifying candidate paths through a state trellis based on a group of observed data, where each candidate path corresponds to a best path through a trellis beginning at one of a possible prior states (and corresponding prior data bit or bits), and then selecting one of the paths based on candidate sequence selection information, typically prior state decisions (e.g., data symbols in the form of one or more bits). The path selection, in turn, provides decoding of symbols and data bit information for use in selecting one of the candidate paths in a subsequent stage.

The present invention provides a method and apparatus for sponsored Internet-based search simulation. The present invention includes receiving a search query sequence that represents a search query and selecting one or more advertisements based on the search query sequence. The present invention further includes filtering the plurality of advertisements based on advertising budget data and determining a number of user-selections on the advertisements using a pre-calculated user-selection model. The present invention further includes updating advertiser account information regarding advertising rates in response to the number of user-selections and generating simulation log data reflecting the advertisings, user-selections and advertising account information. This technique thereby performs the simulation based on user search queries, in response to user-selection models and references the user-selection and advertisement with advertisement budget data, consistent with live sponsored search result operations.

Disclosed is a method and apparatus for performing tile-based rendering. A sequence of tiles to be processed may be determined based on a locality among the tiles. A tile dispatch unit selects a subsequent tile to be dispatched, based on the determined sequence. The tile dispatch unit may check whether an idle fragment processor exists among the plurality of fragment processors, and may dynamically dispatch the selected tile to an idle fragment processor

A list scheduler in a compiler can select from a plurality of alternative instruction sequences for one or more computation performed within an application. A scheduler can initially identify and track one or more computations for which multiple alternative instruction sequences exist. An available instruction list can be populated with the alternative instruction sequences. The list scheduler can access the available instruction list during scheduling of the application. The list scheduler can perform a cost analysis while scheduling the instructions by performing a look ahead. The list scheduler may select alternate instruction sequences for similar computations occurring in different portions of the application based on the cost benefit analysis.

Orthogonal frequency division multiplexing (OFDM) is a spectrally efficient multicarrier modulation technique for high speed data transmission over multipath fading channels, but has low power efficiency. OFDM signals have large crest factors, or peak-to-average power ratios (PARs) which lead to power inefficiency in the RF portion of the transmitter. Selected mapping can be used to reduce the PAR of an OFDM signal and is distortionless. A technique is disclosed that links the index of a phase rotation sequence used in selected mapping to the location of pilot tones that are used to estimate the channel. Each pilot tone location—phase sequence selection produces a different PAR value for the time-domain OFDM signal, and the signal with the lowest PAR value is transmitted. The technique is “blind” in that the optimum pilot tone location—phase sequence index is not transmitted as side information. A technique to blindly detect the optimum index at the receiver is also disclosed.

A signal generating apparatus, which is adapted for outputting a multicarrier signal where data are multiplexed with respect to a plurality of subcarriers, includes: a rotation sequence selection signal generator for generating a plurality of rotation sequence selection signal sequences which vary the phase relationship between subcarriers on the basis of a plurality of phase rotation sequences and include the number of samples, which are smaller than that of actual transmission signals; and a minimum peak power signal generator for selecting a signal of which peak power becomes minimum from the plurality of rotation sequence selection signals to generate an actual transmission signal by using a phase rotation sequence multiplied with respect to the selected signal.

The invention provides a method for calculating the integrated three-phase imbalance degree of multi-circuit transmission lines on the same tower or in parallel. The method comprises the following steps: S1, finding out a three-phase imbalance degree r(i) of each single-circuit transmission line, wherein i represents a circuit number; S2, setting weight ci according to characteristics of each single-circuit transmission line; S3, setting a penalty function f[r(i)] according to the three-phase imbalance degree r(i) of each single-circuit transmission line and a critical value delta of the three-phase imbalance degree; and S4, calculating an integrated three-phase imbalance degree n of the multi-circuit transmission line, wherein n represents the sum of circuits of the multi-circuit transmission line. In the method, the weight is set according to the characteristics of each single-circuit transmission line, and the penalty function is set according to the three-phase imbalance degree of each single-circuit transmission line and the critical value of the three-phase imbalance degree, so that the calculated integrated three-phase imbalance degree can reflect the characteristics of phase sequence arrangement of the multi-circuit transmission line more exactly, thereby providing more reliable evaluation indicators for planning and designing the transmission line and for the optimal phase sequence selection of the transmission line in an operating stage.

An information-hiding method of anti-statistic analysis image based on chaos system includes selecting embedded-position by random sequence generated on basis of chaos system first then carrying out LSB random-embedding and carrying out dynamic compensation on embedded image.

The invention provides a phase sequence selection and scheme generation type traffic signal phase configuration method and system. Basic information is configured; intersection signal basic phases andintersection signal phase sequences are configured on the basis of the configuration of the basic information; and intersection signal phase schemes can be configured with a scheduling-time period-scheme idea. According to the phase sequence selection and scheme generation type traffic signal phase configuration method and system, a traditional scheme-time period-scheduling signal scheme configuration mode is converted into the scheduling-time period-scheme mode; signal scheme period division and signal phase timing setting of each period are performed based on historical traffic flow data; and therefore, intersection signal scheme timing is effectively assisted, and the error of signal scheme configuration caused by traditional sample calculation and artificial experience modes can be avoided, and intersection traffic signal scheme configuration efficiency is improved.

The invention relates to a color image encryption method based on Latin square scrambling. Plaintext keys r1, g1 and b1 are calculated through utilization of R, G and B components of a color plaintextimage, an initial value and a parameter obtained through calculation based on the keys are substituted into a chaotic system, and three groups of chaotic sequences are generated; the chaotic sequences for scrambling and diffusion are selected through utilization of a chaotic sequence selection mechanism based on the plaintext and digital arrangement; and a final ciphertext image is obtained through adoption of a block scrambling policy based on a Latin square and the chaotic sequences, and diffusion operation based on the plaintext and a scrambled image. The encryption method is closely related to the plaintext, so the plaintext attack resistance is improved. The employed chaotic system is an improved chaotic system, a chaotic characteristic is good, the randomness is high and a key spaceis great, so a security level is further improved. A simulation result and safety analysis show that according to the encryption provided by the invention, an image complete encryption demand can besatisfied, the encryption efficiency is high, and the robustness is high.

A method for embedding watermark on robust digital image of airspace image includes using chose sequence generated by cipher key to select initial image pixel block, seeking optimum matched block with said pixel block in complete image, recombining them as per their generated order and making DWT conversion, dividing watermark information as per their importance, realizing unequal error protection by utilizing orthogonal variable length OVSF code spread spectrum treatment and embedding spread spectrum watermark into DWT wavelet coefficient. The method for picking up watermark is also disclosed.