557results about How to "Eliminate jitter" patented technology

A system and method is disclosed for providing dynamic multimedia jitter buffer adjustment for packet-switched networks. The system temporarily stores an amount of incoming data, which is dynamically adjustable, for an amount of time before sending the data out in a more even stream. The system includes a decoder clock, a jitter buffer, a network jitter statistics collector, and a jitter buffer controller. The decoder clock indicates the arrival-time of the data at the system, while the network jitter statistics collector collects the playback-time of that data. By comparing the arrival-time and the playback-time, the jitter buffer controller determines whether the data arrived on schedule. Accordingly, the depth of the jitter buffer can be adjusted to accommodate the late or early arriving data.

A GPS tuner provides high precision measurement, mapping, and Geocaching tools for a pocket PC and other mobile computing devices. The tuner accepts waypoints defining a desired route for navigation by a user, including land, water, and air routes. Waypoints may comprise latitude, longitude, and altitude of a geographical coordinate; user-assigned names; a type of geographic coordinate and coordinate description; photos; and associated sounds. Waypoints may be inputted by a user keying in way point data; by copying waypoints from another stored route; internet downloading from a Geocaching file; or importing from a GPX file. Waypoints may also be established from a free-form hand-drawn route on a touch screen, which may display a world-wide digital elevation model, and upon which a user scanned map may be overlaid through a calibration process. Navigation functions are selectable from a touch screen display of a self-adapting, ergonomically configured, array of icons.

Synchronizing audio and video streams in packet-based networks requires synchronization of packet timestamps. The present invention provides such synchronization without resort to a network time standard. In one embodiment of the present invention, pairs of timestamp synchronized signals, such as audio and video signals, not having a common timestamp clock are mixed. One of the signals, for example, the audio signals, is mixed first while preserving the original audio timestamps. The preserved timestamp information is then used to synchronize the timestamps of the unmixed signals, in this example the video signals, to provide synchronization of all signals. In another embodiment, the present invention uses packets containing calibration of timestamps to reduce jitter. The present invention also includes specifications for a packet for transmitting timestamp information.

Embodiments of the invention provide a camera and an anti-shake method of the camera and relate to the camera shooting technology field. By using the camera and the method, cost of the camera is reduced and a camera structure is simplified. A total reflection mirror component of the camera comprises a total reflection mirror and a first shape memory alloy metal wire arranged on the total reflection mirror. A lens component comprises a lens. A circuit component comprises an inclination detection instrument and a driving chip. The inclination detection instrument is used for detecting a shaking parameter of total reflection mirror shaking and converting the shaking parameter into a first electric signal so as to transmit. The driving chip is used for receiving the first electric signal, calculating a compensation displacement amount according to the first electric signal and outputting a first current to the first shape memory alloy metal wire after calculation. The first shape memory alloy metal wire is used for generating a first tensile force under a first current effect so as to pull the total reflection mirror to move towards a compensation position.

Apparatus for distributing streaming multimedia to at least one end client over a network includes memory and at least one processor operatively connected to the memory. The processor is operative: (i) to receive the streaming multimedia from at least one multimedia source via at least one of a plurality of channels in the network; (ii) when a channel change request generated by the end client for changing a channel and corresponding multimedia content from the multimedia source is not detected, to deliver the at least one multimedia stream to the end client at a first data rate; and (iii) when the channel change request has been detected, to deliver the at least one multimedia stream to the end client at a first rate for a prescribed period of time after receiving the channel change request and, after the prescribed period of time, to deliver the at least one multimedia stream to the end client at the first data rate, wherein the second data rate is greater than the first data rate. The second data rate is greater than the first data rate.

A two-freedom air-shooting rotary table using model airplane helicopter as carrier is prepared for using silica gel vibration attenuation material to isolate connection position between suspension support and model airplane helicopter landing gear, applying V belt driving on horizontal rotary mechanism and rope driving on vertical-rotary mechanism, utilizing round rudder disc with edge notch to drive varifocus control rod of DV machine for carrying out varifocus, utilizing model airplane remote control unit to control DV machine to rotate vertically and horizontally as well as to carry out varifocus by shooting personnel.

The invention relates to a high-precision multi-frequency phase-synchronized laser distance measurement device and method, relates to the technical filed of laser measurement, and mainly relates to a phase laser distance measurement technology. In the invention, the problem that a device and a method capable of realizing both synchronization and stability of multiple measurement gauges are in shortage in the phase laser distance measurement technology is solved. The high-precision multi-frequency phase-synchronized laser distance measurement device comprises a dual-longitudinal-mode frequencystabilization He-Ne laser, a multi measurement gauge generation unit, a beam expanding collimating mirror group, a measuring light path and circuit unit and a control casing unit. The high-precision multi-frequency phase-synchronized laser distance measurement method specifically comprises the following steps of: 1, starting the dual-longitudinal-mode frequency stabilization He-Ne laser; 2, taking one beam of laser as a reference laser beam and the other beam as a measurement laser beam; 3, taking [(f'+f2)-(f+f1)] as the frequency of an accurate measurement gauge and taking (f1-f2) as the frequency of a coarse measurement gauge; 4, moving a measurement corner-cube prism to a target end; 5, obtaining a phase difference phi p; 6, obtaining a phase difference phi c; and 7, obtaining the distance. Thus, the method and device disclosed by the invention can be used for laser distance measurement.

A system and method are provided for prioritizing network processor information flow in a channel service manager (CSM). The method receives a plurality of information streams on a plurality of input channels, and selectively links input channels to CSM channels. The information streams are stored, and the stored the information streams are mapped to a processor queue in a group of processor queues. Information streams are supplied from the group of processor queues to a network processor in an order responsive to a ranking of the processor queues inside the group. More explicitly, selectively linking input channels to CSM channels includes creating a fixed linkage between each input port and an arbiter in a group of arbiters, and scheduling information streams in response to the ranking of the arbiter inside the group. Finally, a CSM channel is selected for each information stream scheduled by an arbiter.

An apparatus and method for implementing multi-traffic load monitoring and prediction in a CDMA cellular mobile communication system includes a received signal strength indication (RSSI) measuring unit for measuring total interference power and processing a measured value to eliminate jitters; a parameter accounting or statistic unit for accounting for some traffic parameters associated to the load monitoring and prediction; a load monitoring unit for calculating the load monitoring based on the measured value and statistic results; and a load prediction unit for calculating an increased amount of an up link load after receiving or accessing new traffic and a total load value after receiving or accessing the new traffic based on parameters requested by the new traffic and calculation results transmitted in real time by the load monitoring unit.

The invention provides a controllable on/off circuit. The controllable on/off circuit comprises a first reset circuit, a second reset circuit and a latching circuit, wherein the second reset circuit comprises a reset chip U2, a regulating capacitor E3 and an NPN triode Q5;The input end of the first reset circuit is connected with a power button S1; the input end of the second reset circuit is connected with the power button S1 through the latching circuit; the output end of the first reset circuit and the Cd end of the reset chip U2 are connected to the positive pole of the regulating capacitor E3; the Vdd end of the reset chip U2 is the input end of the second reset circuit; the OUT end of the reset chip U2 is connected with the base of the triode Q5; the collector of the triode Q5 is connected to a complete machine system power supply VSYSTEM through an MOS tube Q2; and the power button S1 and the collector of the triode Q5 are connected to both ends of the power supply VPOWER in parallel. The invention can switch the on/off state by pressing one button only after treating the hardware circuit, and does not need software programming, thereby having the advantage of low cost.

The present invention relates to an all-digital clock data recovery (CDR) which is implemented by a digital filter and a digitally controlled oscillator. The CDR of the present invention comprises a phase detector producing a digital sequence of data and a digital sequence of edge by sampling the serial data stream with a clock, a de-serializer transforming the digital sequences of data and edge into n-bit bus, a digitally controlled oscillator (DCO) implemented by a multi-stage chain of inverters having a variable resistance switching matrix wherein the resistance of each element of the variable resistance switching matrix is varied in such a way that the supply current being fed to each inverter is controlled in pursuant to a digital control code, and thereby producing a clock whose oscillation frequency is updated and fed to the phase detector, a digital synthesis control logic circuit generating a thermometer-code-type digital control code out of the n-bit data and n-bit edge from the de-serializer wherein the thermometer-code-type digital control code is fed to the DCO, and a 2-bit direct forward path directly controlling the frequency of the clock being produced by the DCO with an operating speed which is faster than the digital synthesis control logic circuit by n times.

The invention relates to a device and a method for maintaining stable operation of strip steel for a cold-rolled strip steel production unit. The method guarantees the stable operation of the strip steel by tension control, prevents the strip steel from torsion and shake by tension of the strip steel, and prevents the strip steel from deviation by adopting an automatic deviation-rectifying control device for the strip steel. The device comprises a decoiler (1) and a coiler (2) which are respectively arranged at the head and the tail of the unit. A high-precision coder is arranged on the decoiler and the coiler. A tension roll (5) is arranged in the unit, and comprises a left roll and a right roll with the same height. The elevation of the left roll and the right roll is respectively higher than that of an inlet pinch roll (4) and an outlet pinch roll (6). A wrap angle is respectively formed at the inlet and the outlet of the tension roll, so that the strip steel is tensioned. An automatic centering and edge-aligning deviation-rectifying control device for the strip steel is respectively arranged on the rear of the decoiler and in front of the coiler. The device and the method can eliminate the problem that the production efficiency is not high due to the torsion, shake and deviation during the operation of the strip steel, and meet the requirements of high stability and high precision of the strip steel on a laser scoring machine unit.

The invention discloses a locked rotor frequency conversion control method and device for drive motors. By means of the locked rotor frequency conversion control method and device, entry and exit of locked rotor frequency conversion are judged through the locked rotor rotating speed zone bit and the locked rotor torque zone bit, and therefore the temperature rise problem of a drive controller in the blocked rotor process is effectively solved. Thus, the time spent when a drive motor outputs large torque is prolonged as much as possible, and the load requirement is guaranteed. Meanwhile, the entry time and the exit time of locked rotor frequency conversion are staggered, the vehicle shaking problem under the critical working condition is solved, and driving safety and comfort are ensured.

The invention discloses a full-digital debouncing circuit and a full-digital debouncing method. The debouncing circuit comprises an edge detection circuit, a digital clipping circuit and a sampling circuit. The edge detection circuit is composed of two D triggers and an XNOR gate and is used for detecting a rising edge and a falling edge of an input square signal with jitter; the digital chipping circuit is composed of counter with an asynchronous reset end and the D trigger and is used for chipping the signal; the sampling circuit is composed of two D triggers and is used for sampling the signal so as to output clean square signal finally. Compared with the debouncing method such as current digital chipping, the debouncing method presented by the invention can be used for reducing delay of introducing the digital chipping while effectively debouncing to ensure duty ratio of the square signal. The full-digital debouncing circuit and the full-digital debouncing method of the invention are particularly applied to the application field that moving phase triggering control has relative strict phase requirement.

The invention discloses a method and a device for automatically detecting impurities in a health wine. The device comprises a detection wheel disc, a bottle feeding mechanism, a bottle discharging mechanism, a sorting mechanism for removing inferior health wine bottles, an mechanical arm for clamping and overturning health wine bottles, a detection bracket, a camera to shoot images for health wine bottles, a lens, a light source and a microprocessor. The method comprises the following steps: a health wine bottle is introduced into the detection wheel disc, is clamped and overturned by the mechanical arm; an sequence image of the health wine bottle is acquired when the health wine bottle is in an inverted state and keeps uniform motion; the acquired sequence image is located by a computer; whether impurities exist in the health bottle or not is judged; and the inferior health wine bottles are removed by a control sorting mechanism. The device and the method have the advantages of low cost, rapid detection speed, high reliability and high detection accuracy rate and the like.

The invention provides a method and device for detecting vehicle violation. The method includes the steps of detecting a target vehicle in collected images, obtaining a first relative location ratio of a licence plate of the target vehicle to the target vehicle, and according to the first relative location ratio, determining a standard value; in the process of tracing the target vehicle, collecting tracing images, and obtaining the locations of the target vehicle at tracing points of the tracing images; utilizing the locations of the target vehicle at the tracing points of the tracing images to obtain a second relative location of the license plate of the target vehicle to the target vehicle, and judging whether or not the second relative location ratio is equal to the standard value; if not, utilizing the standard value to modify the locations of the tracing points, utilizing the locations of the tracing points after rectification to obtain a trail modification value of the tracing images, and according to the trail modification value of the tracing images, judging whether or not the target vehicle breaks traffic regulations. By means of the locations of the tracing points after the rectification, the trail modification value is obtained, whether or not the vehicle breaks the traffic regulations is judged according to the trail modification value, and therefore the problem ofjudgement errors can be avoided.

The invention relates to a radial locking device special for a blowdown grab for a sewer, and belongs to the technical field of grabbing and lifting machines. The radial locking device comprises a top cover, a locking box, a first hydraulic cylinder, a flange, a fixed block and four locking branched chains, wherein the top cover comprises a cross-shaped cover plate, an upper T-shaped installation column and four first sector blocks; the locking box comprises a cross-shaped box body, a lower T-shaped installation column and second sector blocks; the lower end of the first hydraulic cylinder is installed on the locking box, and a piston rod of the first hydraulic cylinder is connected with the flange through threads; the fixed block is connected with the flange through bolts; the four locking branched chains are installed on the locking box. Each locking branched chain comprises a hollow slideway, a linear sliding rail, an ejector rod, an adjusting rod, a limiting spring, a sliding chute and a sliding column. The radial locking device can assist in existing blowdown grab equipment in rapidly cleaning the sewer and cleaning away sludge and dirt, and has the advantages of being easy and convenient to operate, high in cleaning speed, high in working efficiency and the like.

The invention provides a method and a system for inhibiting torsional vibration of a power system of an electric vehicle. The method comprises the following steps of calculating a theoretical motor rotating speed according to an actual wheel rotating speed and a preset power system speed ratio; calculating a motor rotating speed variable quantity according to an actual motor rotating speed and the theoretical motor rotating speed; calculating a motor output torque according to the motor rotating speed variable quantity and preset parameters; controlling a motor to operate according to the output torque. The method and the system provided by the invention have the advantages that the actual motor rotating speed is matched with the theoretical motor rotating speed when the motor is controlled to operate by utilization of the output torque, so that the rotating speed fluctuation of the motor is stabilized, and the torsional vibration of the power system is inhibited, therefore the jittering problem of the electric vehicle when a driver of the electric vehicle deeply treads an accelerator pedal or completely releases the accelerator pedal is eliminated, and the comfortableness of the driver in the driving process is improved.