41results about How to "Reduce transmission requirements" patented technology

An interactive television system includes a partial font generator (38) which generates a character font file of only those fonts used by a given application program for text display. The partial font file contains the language character fonts utilized by the application program, but less than the complete character set of the language. Thus, the partial font file thus requires less time or bandwidth to transmit in the allotted transmit intervals. The partial font file may be generated by a manual process, or by an automated analysis of the fonts used by an application program.

The invention provides a luminous flux control method of a high definition vehicle snapshot system, belonging to the image processing field. The control method comprises the following steps: initializing the parameters of a camera, setting an initial photometric range and a photometric luminance reference value table; obtaining the current shutter speed value, gain value, reference datum value and current photometric interval of the camera; determining the photometric range of an acquired image; calculating photometric luminance value in the designated area of the photometric range; calculating the luminous flux control parameter; sending a control command, waiting in the designated photometric interval, and performing the next adjustment process. The method automatically adjusts the shutter and gain of the acquisition equipment and adjusts the light complement equipment according to the photometric result of a special area so that the pictures shot at any moment have proper exposure luminance, the problem that the exposure effects of the plate number and portraits in a vehicle on the traditional image are not consistent is solved; and the control method can be realized in the embedded system, thus the combination control of multiple devices becomes easy.

A system and method for archiving a user's media collection are provided. In general, a central archiving system stores high-quality versions of a number of known media files and a number of known encoding algorithms. First, each media file in the user's media collection and an encoding algorithm used to encode each media file are classified as either known or unknown to the archiving server. For each known media file encoded with a known encoding algorithm, the archive includes information identifying the media file, information identifying the encoding algorithm for the media file, and optionally the one or more quality parameters such as bit rate, sampling frequency, and the like for the media file. For each unknown media file and/or media file encoded with an unknown CODEC or encoding algorithm, the archive includes the media file, which is uploaded and stored at the archiving system.

The invention discloses a character-type communication message compression method adopting inter-frame coding, and the method comprises following steps of reading one frame of message, judging whether the frame of message is a frame I of message or not, if the frame is the frame I of message, directly conducting Huffman coding, otherwise solving a residual error and conducting Huffman coding for the residual error, and then judging whether a next frame of message exists or not. The intra-frame and the inter-frame coding concept in the video compression coding is introduced into the character-type message compression, and the compression ratio of the message is greatly improved by removing two adjacent message or similar message redundancy information; and the dynamic Huffman coding is specifically applied to the nondestructive compression of the frame I of message and frame P of residual part, so that the dynamic Huffman coding advantages can be adequately played, the advantages such as delay reduction, reduction of storage capacity, low transmission requirement and the like can be realized while the message data quantity is remarkably reduced and the message length is also reduced, so that the message can be rapidly, efficiently and inerrably transmitted, shared and allocated, and the storage resource and the communication resource can be greatly saved.

The invention discloses a method, a device and a base station system for radio frequency signal transceiving and belongs to the field of communication. The device for the radio-frequency signal transceiving comprises a radiating circuit used for amplifying power of input first analog signals, radiating the first analog signals after the power of the first analog signals are amplified in a wireless mode and outputting the analog signals after the power of the first analog signals are amplified to a predistortion circuit, the predistortion circuit and a receiving circuit, wherein the predistortion circuit is used for conversing the first analog signals to second analog signals after the power of the first analog signals is amplified and outputting the second analog signals which are used for feeding back distortion degree of the first analog signals, the first analog signals are pre-compensated according to the distortion degree, and the receiving circuit is used for receiving third analog signals in a wireless mode and processing and outputting the third analog signals. The method, the device and the base station system for the radio frequency signal transceiving can improve radio frequency signal transceiving efficiency, reduce cost of the base station system, and reduce achievement difficulty of the base station system.

The invention discloses a flush flood and debris flow warning method based on pore water pressure monitoring. The method comprises the steps that the location of a monitoring point is determined, and a pore water pressure sensor is resettled; a series of monitored pore water pressure Pc is converted into a mud bit; the flow QJ of a corresponding monitoring point is calculated, and a curve of the relationship between Pc and QJ is established; the flow Q*J of the monitoring point and the flow Q*B of the location of a protected object under different rainfall conditions are respectively calculated; according to a curve of the relationship between Q*J and Q*B, the flow QY of a monitoring point corresponding to protection standard flow is determined; according to the curve of the relationship between Pc and QJ, the pore water pressure corresponding to QY is determined as red warning pressure Pred, and the pore water pressure corresponding to 0.75QY is determined as yellow warning pressure Pyellow; when actual warning is carried out, the actually measured pore water pressure which is monitored in real time is compared with Pred and Pyellow, and warning information is issued. According to the method, disaster prevention warning information and disaster prompt warning information are respectively provided according to different situations, and the method has the advantages of high reliability and accuracy.

The invention provides a video supply system and method based on a scene mode and a user perception demand, and solves the problems that video supply lacks user feedback and transmission resources arewasted. A user interaction sub-module receives a user demand and transmits the user demand to a server; a video quality decline judgment sub-module gives a video quality judgment result, and a codingcontrol module and a coding module jointly realize video quality adjustment. According to the method, video data acquisition, transmission and objective quality evaluation are carried out, a video supply mode is selected, and videos are supplied according to the selected mode. The video quality is adjusted according to the perception requirement and the scene mode of the user. The control mode issubjective and automatic, and the strategy is divided into dynamic and static scenes. According to the supply method, the perception requirement and the scene mode of the user are integrated, the perception experience of the user is improved, visual redundancy is reduced, and it is guaranteed that the main requirement of the user is met when transmission conditions are insufficient. Video supply.

The invention provides a recording and broadcasting device and a remote teaching device, which relate to the technical field of remote teaching and include a recording and broadcasting device, a streaming media server and a playback terminal, and the playback terminal and the interactive terminal of the recording and broadcasting device are respectively connected to the streaming media server through a network; tracking The equipment collects the first audio and video information of the teaching environment, the recording and broadcasting host packs the first audio and video information, generates the second audio information, stores and publishes the second audio information, and the interactive terminal performs the first audio and video information The low-bit stream processing generates the third audio and video information, and transmits the third audio and video information through the network through the protocol push library. The streaming media server processes the third audio and video information through the transcoding tool library to generate audio and video playback information. The playback terminal requests and plays the audio and video playback information. The invention can reduce the transmission requirement and cost, and improve the fluency of video playing.

The invention provides an AMOLED drive device which comprises an AMOLED drive circuit, a scanning drive signal source, a data driving signal source and a data driving signal source control module. The AMOLED drive circuit comprises a first semiconductor controllable switch, a second semiconductor controllable switch, an energy-storage capacitor and an organic light-emitting diode; the scanning drive signal source is used for generating scanning drive signals; the data driving signal source is used for generating data driving signals; and the data driving signal source control module is used for controlling the working mode of the data driving signal source. The AMOLED drive device carries out division on gray-scale value of each pixel, thereby reducing data volume of each PWM drive signal, and reducing transmission speed for a drive chip and requirement for storage speed of a storage device.

The invention provides an AMOLED drive method, and the method comprises the steps: enabling the gray scale value of each pixel of each picture frame to be divided into n parts, so as to obtain n PWM drive signals of an organic light-emitting diode, wherein n is a positive integer which is greater than or equal to one; enabling the drive time of each picture frame of the organic light-emitting diode to be divided into n sub drive time parts; enabling n sub drive time parts of each picture frame to be corresponding to PWM drive signals in a one-one manner; enabling all PWM drive signals of each picture frame to be transmitted to the organic light-emitting diode in the corresponding sub drive time part, so as to carry out picture display drive. The method provided by the invention divides the gray scale value of each pixel, thereby reducing the data size of each PWM drive signal and reducing the requirements for the transmission speed of a drive chip and the access speed of a storage unit.

The embodiment of the invention provides a loading method and device of a complex three-dimensional model in three-dimensional virtual simulation. The method comprises the following steps: dividing a three-dimensional model to be loaded into a plurality of three-dimensional model blocks; setting a trigger zone for each three-dimensional model block; determining the trigger zone where a viewpoint position is positioned at present, and loading the three-dimensional model block corresponding to the trigger zone where the viewpoint position is positioned at present into a three-dimensional virtual simulation program. The scheme avoids the problem that a client side constantly loads resources from a service side since the each-time viewpoint movement of a user in the model needs to reload the model so as to lower requirements on network transmission.

Presented is a system and method for monitoring activities of daily living, ADLs, of a person within an environment containing an object that is controllable by the person via a control system. The system comprises a data collection unit adapted to obtain control data from the control system, the control data being based on one or more control signals generated by the control system for controlling the object. A data analysis unit is 5 adapted to determine an ADL event of the person based on the obtained control data.

The invention relates to the technical field of video conferences, in particular to a conference cascading method and electronic equipment, and the method comprises the steps: sending a request message for opening a logic channel to second conference control equipment; receiving a response message of opening the logic channel fed back by the second conference control equipment based on the requestmessage; analyzing the response message to obtain a second network address; and based on the second network address, sending a network connection request to the second conference control device to establish a network connection with the second conference control device. Cascading capability negotiation is carried out before network connection is established, so that the problem of cascading failure caused by the cascading capability in the subsequent process can be avoided; the second network address of the second conference control device is utilized to realize the network connection, the network address acquired by the first conference control equipment is the current network address of the second conference control equipment, and the network address is used for establishing the networkconnection, so that the conference cascading efficiency can be improved.

The invention provides a monitoring transmission device, a monitoring terminal, a monitoring system and a monitoring method. The method comprises the steps: generating feature data corresponding to state information of a monitored object according to the state information of the monitored object, and transmitting the feature data, wherein the data size of the feature data can be smaller than or equal to the maximum data size borne by a data packet of a transmission module, the number of monitoring data needing to be transmitted is greatly reduced, and the transmission efficiency is improved. Therefore, the number of packets is greatly reduced, that is, the purpose similar to monitoring data compression can be achieved, that is, on the premise that useful information (feature data) is not lost, the data size is reduced so as to improve the transmission efficiency, and the real-time requirement is met.