31 results about "Dual code" patented technology

A dual code authentication process combining a visible QR code with an invisible randomly generated code which can be alpha, numeric, symbol or image that can only be read with a reading device. A data generation engine is used to create the generated code which is assigned to the QR code and stored in a cloud based database. The QR code is decodable by a handheld reading device which communicates with the cloud based database releasing a copy of the generated code to the reading device. A reader is then used to decode the invisible printed code wherein the user can compare the printed code on the document and the code stored on the cloud based database to determine a match and authenticity.

The invention belongs to the technical field related to numerical control machining, and discloses a spline trajectory control command optimization method based on the joint action of double codes. The method comprises the following steps: (a) setting the ideal processing trajectory of the object to be processed, and generating G codes according to the set ideal processing trajectory; (b) drawing the processing trajectory corresponding to the G code to obtain the actual processing trajectory, and The actual processing trajectory is compared with the ideal processing trajectory to obtain the distinguishing feature, and the code corresponding to the distinguishing feature is found in the G code, that is, the distinguishing feature code; (c) according to the distinguishing feature, for the Different feature codes are rewritten to obtain new processing codes. The new processing codes make the actual processing trajectory of the CNC machine tool the same as the ideal processing trajectory, and the optimization of the processing trajectory is realized so far. Through the invention, the machining track is optimized, the machining accuracy is improved, and the machining error is reduced.

The invention discloses a linear double-code-track absolute steel tape ruler and a reading method thereof. The invention comprises a steel tape ruler, a first detection head group, a second detection head group, a third detection head group and a fourth detection head group, the steel tape ruler is composed of an absolute code track and an identification code track. The detection method is as follows: the first detection head group and the second detection head group detect the absolute code channel to obtain the first absolute code and the second absolute code, respectively, and the third detection head group and the fourth detection head group detect the identification code channel to obtain respectively. The first identification encoding and the second identification encoding, according to whether the first absolute encoding is zero, select the corresponding absolute encoding and identification encoding, and finally obtain the absolute distance value and the identification distance value according to the absolute encoding mapping table and the identification encoding mapping table, thus Absolute position is available. The steel tape ruler of the invention has the advantages of high resolution, large measuring range, simple manufacture, low cost and real-time detection of absolute position.

In the embodiment of the present invention, by indicating a double-codeword transmission mode and two single-codeword transmission modes, wherein the two single-codeword transmission modes are distinguished by using the new data indication NDI, so that the available state value of the reference signal configuration increases, and then can support Higher-order (such as 16-layer, 24-layer) MU-MIMO can significantly improve the spectral efficiency of the system, and also increase the flexibility of MU-MIMO configuration and improve the effectiveness of resource scheduling.

The invention discloses a method for real-time video transmission in a fluctuating network environment. The method comprises: step 1, dual-path code streams are coded simultaneously, wherein one pathof code stream being a high-definition steam is marked as stream origin and the other path of code stream being a real-time stream is marked as stream dynamic; step 2, the high-definition stream (stream origin) and the real-time stream (stream dynamic) are cached with certain time lengths simultaneously in a transmission cache; step 3, the dual code streams are not transmitted simultaneously and delayed switching is carried out according to a switching strategy; and step 4, an encoder scheduling strategy is generated dynamically, wherein the encoder scheduling strategy is updated in real timeaccording to the situation of a network sending caching region and a user scheduling strategy.