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1118 results about "Control quality" patented technology
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Control Quality. Control quality involves activities used to evaluate whether the product or service meets quality requirements that are specified for the project. Quality control is very crucial in project management because it ensures that everything is within the scope of the project planning.
Controlling quality of service in a mobile communications system
InactiveUS7023825B1Facilitates dynamic renegotiationLittle overhead into the mobile communications systemConnection managementData switching by path configurationQuality of serviceCommunications system
A method for transmitting data packets in multiple data flows to / from a mobile station in a mobile communications system. A data transmission path is formed for routing data packets. Multiple profiles are associated with the data transmission path, each profile comprising at least one quality of service parameter, or QoS parameter. Each flow or data packet is provided with a profile tag indicating one of the multiple profiles. Scheduling and policing the transmission of individual data packets is based on at least one QoS parameter of the profile indicated by the profile tag associated with the data flow in question.
Owner:NOKIA TECHNOLOGLES OY
System and method for a mass flow controller
InactiveUS6962164B2Eliminates the effects of hysteresisFluid pressure measurementPipeline systemsHysteresisControl quality
A system and method for controlling a mass flow controller to have a constant control loop gain under a variety of different types of fluids and operating conditions, and for configuring the mass flow controller for operation with a fluid and / or operating conditions different from that used during a production of the mass flow controller. Further, the system and method includes providing control by reducing the effects of hysteresis in solenoid actuated devices by providing a non-operational signal to the solenoid actuated device.
Owner:BROOKS INSTRUMENT
Flow control and quality of service provision for frame relay protocols
InactiveUS20030185249A1Energy efficient ICTChannel dividing arrangementsTraffic capacityQuality of service
Apparatus and method for providing controlled Quality of Service over Ethernet-like links. Prioritised frames are allocated to transmission queues responsive to their priorities. Each queue has an associated subsidiary Ethernet MAC which transmits frames from its queue subject to a scheduler which selects from the set of MAC's according to a pre-determined algorithm. The multiple logical paths between corresponding pairs of transmitter and receiver subsidiary MAC's are preferably multiplexed over a single physical channel. If congestion occurs at the receiver, then Ethernet PAUSE frames may be sent back to the transmitter, directed to specific subsidiary MAC's-typically those with lower priority-to suspend transmission from the corresponding queue for a time period indicated in the PAUSE frame. In this way back pressure flow control may be applied selectively to so that large amounts of low priority traffic do not cause unnecessary delays to higher priority traffic.
Owner:NORTEL NETWORKS LTD
System and method for controlling quality of service in a wireless network
InactiveUS20050014509A1Error preventionFrequency-division multiplex detailsQuality of serviceControl quality
A system and method for controlling Quality of Service (QoS) in a wireless network on a per-user basis. According to the preferred embodiment, each user will have a QoS profile, listing the levels of service he is authorized to receive. The RAN assigns radio and network resources for the user, based on the applications that the user is running and the user's profile. A QoS server in the base station controller manages user QoS. When the base station controller receives a packet data call from a mobile station, the QoS profile and the application type that the mobile station is executing will be used to determine QoS parameters for the user's call.
Owner:SAMSUNG ELECTRONICS CO LTD
Content provisioning system and method
InactiveUS20030217091A1Digital computer detailsMultiprogramming arrangementsQuality of serviceNetworked system
To implement more appropriate QoS control by compressing contents data distributed via a network taking into consideration meaning of contents and preferences of users. A network system comprises a content provider that provides content and client that acquires the content. The content provider attaches information on communication priorities to the content based on the content's importance which is determined from the meaning of the content's and sends the content to the client using a protocol which controls quality of service based on the priority and the client receives the content transmitted by the content provider.
Owner:IBM CORP
Method of controlling quality of service for a wireless LAN base station apparatus
InactiveUS20060120339A1Increase probabilityImprove service qualityError preventionNetwork traffic/resource managementQuality of serviceWireless lan
An access point is provided which is able to secure QoS of multimedia traffic. In the method of controlling QoS for wireless LAN base station apparatus used in a wireless LAN system operating in accordance with IEEE 802.11 standard, the base station or access point is included in a network working in an infrastructure mode with other mobile stations controlled in access by the DCF function. When the access point is receiving a first frame sent from the mobile station and holds a multimedia frame to be sent with high-priority after having received the first frame, it loads the Duration / ID field of an ACK frame responding to the first frame with a time required for transmitting the multimedia frame, and then sends the ACK frame.
Owner:LAPIS SEMICON CO LTD
Method and system for reducing overlay errors within exposure fields by apc control strategies
ActiveUS20080057418A1Easy alignmentHigh spatial coveragePhotomechanical apparatusSpecial data processing applicationsControl systemControl quality
By taking into consideration tool-specific distortion signatures and reticle-specific placement characteristics in an alignment control system, the control quality of sophisticated APC strategies may be significantly enhanced. Respective correction data may be established on the basis of any combinations of tool / reticles and layers to be aligned to each other, which may modify the respective target values of alignment parameters used for controlling the alignment process on the basis of standard overlay measurement data obtained from dedicated overlay marks.
Owner:ADVANCED MICRO DEVICES INC
Milking sow concentrated feed
ActiveCN101579062AImprove lactation performanceImprove reproductive performanceAnimal feeding stuffAccessory food factorsPhytaseAdditive ingredient
The invention relates to a milking sow concentrated feed, mainly comprising the main components such as fat powder, fish meal, puffed corn powder, natural plant extract, lysine, phytase, electrolytic mixture, choline, composite vitamin supplement, salt, rock powder, calcium hydrogen phosphate, mineral elements such as iron, zinc, copper, manganese, iodine, cobalt, selenium, chromium and the like, and accessories such as antioxidant, mildewproof agent, feed carrier and the like. The feed has multiple nutritional components, which can improve synergistically the lactation ability and proliferation ability of milking sows. Meanwhile, the content of the concentrated feed provided by the invention in daily ration is 10 % (according to weight percentage), the concentrated feed is easy to mix evenly and conducive to solve the problems that the methods for preparing feeds and controlling quality are not enough.
Owner:河南雄峰科技股份有限公司
Microminiature unmanned aerial vehicle longitudinal control method with random delay of distributed network
ActiveCN103116280AAlleviate quality deteriorationImprove stabilityAdaptive controlClosed loopEngineering
The invention discloses a microminiature unmanned aerial vehicle longitudinal control method with random delay of a distributed network, and belongs to the field of flying control technology. The method includes firstly setting up an unmanned aerial vehicle longitudinal system model and designing a flying control system without network delay, secondly carrying out random robustness analysis and design on the flying control system on the condition of different network random delay, ensuring a gain scheduling strategy of the flying control system, and lastly carrying out closed-loop six-free-degree freedom nonlinear Monte-Carlo simulation verification. According to the control method, deterioration of quality of the flying control system due to network delay is relieved, and stability of the distributed type system can be strengthened. Through utilization of the random robust analysis and design method and the gain scheduling strategy based on linear interpolation, the obtained control has the advantages of being simple, and facilitating engineering realization. Control quality of an original system can be well maintained on the condition of changes of large network delay.
Owner:BEIHANG UNIV
System and method for nonlinear dynamic control based on soft computing with discrete constraints
InactiveUS6950712B2Minimizes entropyMaximizes sensor information contentDigital data processing detailsAnimal undercarriagesNon linear dynamicMinimum entropy
A control system using a genetic analyzer based on discrete constraints is described. In one embodiment, a genetic algorithm with step-coded chromosomes is used to develop a teaching signal that provides good control qualities for a controller with discrete constraints, such as, for example, a step-constrained controller. In one embodiment, the control system uses a fitness (performance) function that is based on the physical laws of minimum entropy. In one embodiment, the genetic analyzer is used in an off-line mode to develop a teaching signal for a fuzzy logic classifier system that develops a knowledge base. The teaching signal can be approximated online by a fuzzy controller that operates using knowledge from the knowledge base. The control system can be used to control complex plants described by nonlinear, unstable, dissipative models. In one embodiment, the step-constrained control system is configured to control stepping motors.
Owner:YAMAHA MOTOR CO LTD
Quality of service admission control based on congestion of backhaul connection
The present invention provides a method of communication using at least one base station and at least one switch. The method includes allocating at least one resource of at least one backhaul connection between said at least one base station and said at least one switch based upon at least one indication of congestion associated with said at least one backhaul connection.
Owner:LUCENT TECH INC
Policy decision-making functional entity, home gateway and method and system for controlling quality of service
InactiveCN101572719ASolving Dynamic Control ProblemsData switching by path configurationQuality of servicePolicy decision
The embodiment of the invention discloses a policy decision-making functional entity, a home gateway and a method and a system for controlling the quality of service. The method for controlling the quality of service comprises the following steps: receiving a service request; authorizing the service request and making a policy decision for the service request so as to decide a policy rule of the quality of service corresponding to a service required by the service request; and sending the policy rule of the quality of service corresponding to the service request to a home gateway which distributes service quality resources to the service. The embodiment of the invention solves the problem of controlling the dynamic quality of service of a home network.
Owner:HUAWEI TECH CO LTD
Diversified energy automatic generation control method considering wind power acceptance
ActiveCN103390905AFully explore the ability of active frequency regulationReduced FM StandbySingle network parallel feeding arrangementsWind energy generationAutomatic Generation ControlElectricity
The invention relates to the field of electric power systems, and particularly to a diversified energy automatic generation control method considering wind power acceptance. The method comprises the following steps: classifying units according to different AGC adjustment performances and unit types, and dividing load changing tendencies (rising / declining / stable) by combining with a load prediction result; calculating an area control error ACE of a current region, and defining a zone (dead zone / help zone / secondary emergency zone / emergency zone) which the area control error ACE of the current region belongs to; and adopting different ACG adjustment tactics according to the differences of the load tendencies and ACEs. The method conducts classification on all units; the units match with each other to carry out the water-fire-wind combined automatic generation control; the frequency adjustment ability of a system is fully excavated to lower the frequency regulation reserve of the system; and the purpose of more accepting the wind power output is realized while the control quality is ensured.
Owner:STATE GRID CORP OF CHINA +2
Method for coordinating and controlling quality change of coal in supercritical once-through boiler unit
Owner:ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER
System and method for monitoring and controlling quality of culture water and integrated water quality analyzer thereof
InactiveUS20100099193A1Effective monitoringEffective controlMaterial analysis by observing effect on chemical indicatorDigital computer detailsPresent methodWater quality
A system and a method for monitoring and controlling the quality of a culture water are provided. The system includes a plurality of smart culture nodes having integrated water quality analyzers, a culture gateway and a terminal host. In the present method, each of the smart culture nodes detects the quality of the culture water through the integrated water quality analyzer thereof and activates corresponding culture equipments to adjust the quality of the culture water. Besides, the terminal host groups the smart culture nodes through the culture gateway and synchronously controls the smart culture nodes in the same group according to a water quality information collected by the smart culture nodes in the same group so as to activate the corresponding culture equipments to adjust the quality of the culture water. Thereby, the quality of the culture water can be efficiently monitored and controlled.
Owner:IND TECH RES INST
Method for controlling quality of ginkgo leaves and extract thereof
InactiveCN103175912AEasy to separateEasy CalibrationComponent separationCurative effectControl quality
The invention discloses a method for controlling the quality of ginkgo leaves and an extract thereof. After the screening of a great quantity of experiments, the method adopts ultra-high performance liquid chromatography for detection; and the method can be used for detecting three types of components including flavone, terpene lactones and phenolic acid, twenty-four active compounds in total, in the ginkgo leaves and the extract of the ginkgo leaves. The results of the experiments prove that the method is high in detection sensitivity and good in stability, and can be used for objectively, comprehensively and accurately evaluating the quality of ginkgo leaf medicines, the extract of the ginkgo leaves and ginkgo leaf preparations, thus having important significance on controlling the quality and guaranteeing the clinical treatment effect.
Owner:NANJING UNIVERSITY OF TRADITIONAL CHINESE MEDICINE
Discrete sliding mode repetitive control method for periodic servo system
ActiveCN101976042AEliminate the effects ofServo PreciseControllers with discontinuous output signalState spaceControl quality
The invention relates to a discrete sliding mode repetitive control method for a periodic servo system, which comprises the following steps: identifying a difference equation model of the current servo system, and converting the difference equation model into a state space model; selecting a linear switching function; forming a discrete reaching law, and constructing an ideal switching dynamic state according to the formed discrete reaching law; constructing a discrete sliding mode repetitive controller model according to the ideal switching dynamic state; and using current control variables as the control command for a controlled servo system to enable the servo system to change with reference signals. The invention can weaken the system chattering, and simultaneously inhibit the influence of periodic disturbance on the system, thereby improving the control quality and realizing the accurate control on periodic tracking tasks.
Owner:ZHEJIANG UNIV OF TECH
Active disturbance rejection control technology-based method for controlling synchronization of photovoltaic power generation system
InactiveCN101969210ARealize grid connection controlReduce shockSingle network parallel feeding arrangementsPhotovoltaic energy generationActive disturbance rejection controlPower grid
The invention provides an active disturbance rejection control-based method for controlling synchronization of a photovoltaic power generation system. The photovoltaic power generation system is a non-linear system, influenced by power grid and environment and strongly disturbed by the outside and has nonlinear uncertain factors. According to the work characteristics of the system, the active disturbance rejection control technology is adopted to realize effective control of the system. The system dynamically observes the uncertain factors in the system model and external disturbance by utilizing an extended state observer of an active disturbance rejection controller (ADRC) to ensure that the system has good adaptability to disturbance, can adapt to changes of an object model and the surrounding environment in a large range without influencing the control quality of the controller, and represents well robustness.
Owner:TIANJIN UNIVERSITY OF TECHNOLOGY
Method for controlling quality and condition on the basis of thermal imaging
Owner:METSO AUTOMATION OY
Compressed air flow regulating device and compressed air flow regulating method used for high-speed wind tunnel special test
ActiveCN103365306AAerodynamic testingFlow control using electric meansAir volumeProgrammable logic controller
The invention provides a compressed air flow regulating device and a compressed air flow regulating method used for a high-speed wind tunnel special test, belonging to the technical field of dynamic wind tunnel tests. The device comprises a pneumatic regulating valve, a pressure transmitter, a flow regulating and combining unit, a mass flow meter and a PLC (programmable logic controller). With the adoption of the method, based on the change conditions of air volume, a digital mass flow control strategy is adopted, and a fuzzy control manner is adopted for the changes of the air volume; the flow regulating and combing unit is digitally controlled by utilizing the PLC; the pressure transmitter and the mass flow meter are respectively arranged at the front part and at the rear part of the flow regulating and combining unit, and are used for monitoring and collecting the pressure at an inlet of the flow regulating and combining unit, and actual flow output from the flow regulating and combining unit; the actual flow is compared with theoretical flow to calculate a difference value; and the pneumatic regulating valve and the flow regulating and combining unit are controlled through the PLC, so that the flow finally achieves a needed value, and thereby the condition that the compressed air flow in the wind tunnel special test is accurately controlled is realized.
Owner:INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
Method for Scoring and Controlling Quality of Food Products in a Dynamic Production Line
ActiveUS20140147015A1Amount being removedImproving overall appearance scoreImage enhancementImage analysisProduction lineImaging analysis
A method for scoring and controlling the quality of dynamic food products transitioning in the processing steps is performed using image analysis. An image of a plurality of moving food products on a conveyor system is captured by on-line vision equipment and image analysis is performed on the image via an algorithm that determines the percentage of pixels having varying intensities of colors and applies predetermined preferences to predict consumer dissatisfaction. The entire group of food products of one or more images is given an overall appearance score and each individual food product is also scored such that each may be ranked from least to more acceptable. The ranked food products can then be ejected in the order of worst to better rank to increase the overall quality score of the entire group.
Owner:FRITO LAY NORTH AMERICA INC
Greenhouse environment intelligent control method based on global variable prediction model
InactiveCN103235620AQuality is easy to controlReduce oscillationSimultaneous control of multiple variablesAdaptive controlResponse processState of the Environment
The invention belongs to the technical field of facility agriculture environment control, and environment factors such as temperature, humidity, illumination intensity, CO2 concentration and the like in a greenhouse can be intelligently controlled. According to the greenhouse environment intelligent control method, a concept of a global variable is set, internal and external environment parameters in the greenhouse, current operating states of all controllers and local weather forecast for the next eight hours are used as all variables of a system, so as to be called global variables; and on this basis, a greenhouse environment prediction model based on the global variables is provided, and a BP (Back Propagation) artificial neural network is adopted to establish the model. By utilizing the model and combining fuzzy control, the greenhouse environment control method based on the global variables is invented. The greenhouse environment control method comprises the following steps that all of the global variables are used as input values, internal environment states of the greenhouse are predicted, and advanced adjustment is performed by the controllers in accordance with prediction results. By using the greenhouse environment intelligent control method, the problems of response lag, passive adjustment, inconsistent adjustment of the controllers and the like of traditional greenhouse environment control are solved, lag and oscillation in a response process are reduced, and the quality control of the greenhouse is improved.
Owner:HEBEI AGRICULTURAL UNIV.
Methods and apparatuses for facilitating quality of service control
InactiveUS20140010209A1Lower quality of serviceReduce signaling overheadNetwork traffic/resource managementAssess restrictionQuality of serviceTerminal equipment
Methods and apparatuses are provided for facilitating quality of service control. A method may include receiving, at a terminal apparatus, a set of one or more quality of service parameters provisioned by a serving network apparatus. The method may further include determining a configuration setting for controlling quality of service for a device-to-device connection between the terminal apparatus and another device based at least in part on at least one received quality of service parameter. The method may additionally include causing implementation of the determined configuration setting. Corresponding apparatuses are also provided.
Owner:NOKIA TECHNOLOGLES OY
Clock, Frequency Reference, and Other Reference Signal Generator with a Controlled Quality Factor
ActiveUS20090146752A1Reduce mistakesFast fall timeAngle modulation by variable impedencePulse automatic controlElectricityCapacitance
Exemplary embodiments of the invention provide a reference signal generator having a controlled quality (“Q”) factor. An exemplary apparatus to generate a harmonic reference signal includes a reference resonator, such as an LC-tank, which generates a first reference signal having a resonant frequency, and a plurality of reactance modules couplable to the reference resonator. Each reactance module comprises one or more reactance unit cells, and each reactance unit cell comprises a reactance element coupled in series to a switching element. In exemplary embodiments, the reactance element is a capacitor having a predetermined unit of capacitance, and the switching element is a transistor having a predetermined resistance when in an off state. The ratio of capacitance to resistance is substantially constant for all reactance modules of the plurality of reactance modules.
Owner:INTEGRATED DEVICE TECH INC
Device and method for controlling quality of sounds generated during vehicle door closing
ActiveCN103568998AControl the strength of the closureReduce door slammingElectric/fluid circuitNoise detectionControl quality
The invention provides a device and method for controlling the quality of sounds generated during vehicle door closing and belongs to the technical field of automobiles. The device and method for controlling the quality of the sounds generated during vehicle door closing can improve the quality of the sounds generated during vehicle door closing. The device for controlling the quality of the sounds generated during vehicle door closing comprises a microprocessor, a vehicle control unit, a vehicle body controller, an angular acceleration sensor, an angle sensor and a noise detection unit, wherein the vehicle control unit, the vehicle body controller, the angular acceleration sensor, the angle sensor and the noise detection unit are all connected with the microprocessor, the output end of the microprocessor is connected with a door closing force reducing device, and the microprocessor is connected with at least one audio loudspeaker through a driving circuit. The method for controlling the quality of the sounds generated during vehicle door closing comprises the steps that (A) whether the angle of a vehicle door is zero is judged and whether the speed of a vehicle is zero is further judged; (B) an angular acceleration value of the vehicle door is judged when the angle of the vehicle door is not zero and the speed of the vehicle is zero, and the angular acceleration of the vehicle door is reduced when the angular acceleration value of the vehicle door is judged to be larger than a set value of a current vehicle door opening angle; (C) noise signals are collected when the angle of the vehicle door is not zero, and a voice frequency neutralizing signal is generated under control and given out at the moment when the vehicle door is closed. The device and method can improve the quality of the sounds generated during vehicle door closing.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
Fuzzy adaptive PID controller design method of aero-engine based on RBF neural network feedforward
The invention discloses a fuzzy PID adaptive controller design method of an aero-engine based on RBF neural network feedforward and belongs to the aero-engine numerical control system field. The method is used for improving acceleration and deceleration work states of the aero-engine and components under effects of an extraneous condition and internal control so that the engine possesses a good acceleration and deceleration characteristic. The technical scheme is characterized by based on an aero-engine steady state test data sample, using an RBF neural network to carry out off-line training so as to form a feedforward controller; and based on that, adding a fuzzy adaptive PID controller. In the invention, through carrying out acceleration and deceleration control on each state of the aero-engine, the controller possesses a good tracking effect and a good controller parameter online setting capability, control quality of the system in a large range can be further increased and a control difficulty brought by a non-linear characteristic of the engine can be effectively solved.
Owner:SHENYANG AEROSPACE XINGUANG GRP
Control optimizing method for master controller of supercritical unit boilers
ActiveCN102563598AGuaranteed control effectEnsure responsivenessBoiler controlControl systemClosed loop
The invention discloses a control optimizing method for a master controller of supercritical unit boilers. The control optimizing method includes introducing an inertial element F(s) and a lagging element y1 into a feed-forward control branch to replace a modification function My(s) for a main vapor pressure input value ysp which is randomly set by an original system; providing input signals of the lagging element y1 by an element F(s), and leading reference signals yf outputted by the lagging element y1 to act on an input end of a closed-loop control element; and additionally optimizing a transfer function Mu(s) of the feed-forward control branch of an original boiler master control system into a pressure compensation transfer function Mf(s), meeting the requirement of parameter-variable running of a feed-forward function uff of the original boiler master control system, leading the uff and the yf to jointly act on the closed-loop control element, then controlling a follow-up executing mechanism and accordingly realizing master control for the boilers. The control optimizing method has the advantages that the master controller of the boilers can quickly and accurately output instructions to a fuel master controller and a water supply master controller, accordingly a main vapor pressure control effect is guaranteed, response characteristics of load are further ensured, and control quality of the unit and economical indexes are improved.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
Method and system for self-adjusting fuzzy PID (Proportion Integration Differentiation) parameters in furnace temperature control system
InactiveCN104808708AImprove qualityTemperatue controlAdaptive controlFurnace temperatureDifferential coefficient
The invention provides a method and a system for self-adjusting fuzzy PID (Proportion Integration Differentiation) parameters in a furnace temperature control system. The method comprises the following steps: selecting and quantifying variables in a PID controller and finding out a fuzzy relation of three PID control parameters including a proportionality coefficient KP, an integral coefficient KI and a differential coefficient KD , and system deviation e and a deviation varying rate ec; establishing a fuzzy relation table; and carrying out online modification on the three parameters by a fuzzy control method. The system corresponds to the method. After PID parameter online fuzzy self-adjustment is carried out, a normal working state is automatically switched, and a PID parameter adjusting process is automatically started when system performances are changed and the readjusted PID parameters so that the system has the better control quality.
Owner:CHONGQING TECH & BUSINESS INST
Direct mass balancing and coordinating control system of direct current boiler unit
ActiveCN102323748AImprove dynamic response characteristicsImprove stabilityEngine componentsSteam engine plantsEnergy balancingEvaporation
The invention respectively adopts a direct energy balancing mechanism to realize the dynamic decoupling between a steam turbine power regulating loop and a boiler burning regulating loop and a direct mass (flow) balancing mechanism to realize the dynamic decoupling between a steam turbine power regulating loop and a boiler water supply regulating loop, and decouples a usual direct current boiler unit 3*n multi-variable parallel control system onto a decoupling control loop in a hierarchical control structure. The boiler burning regulating loop cancels an usual front side pressure series regulator, and takes the enthalpy increased deviation of an evaporation heated surface of a boiler as the control input; and the boiler water supply regulating loop is designed into fuel-water ratio regulation with a steam turbine power instruction as the input; and the dynamic compensation between boiler burning and water supply is designed. The method best eliminates the coupling impact among all the regulating loops, so that the adjustment is convenient, and the control quality of the direct current furnace unit coordinating control system under the working conditions of variable pressure and variable load is improved.
Owner:BEIJING GUODIAN ZHISHEN CONTROL TONGDY
Multi-channel audio encoding and decoding
ActiveUS8069050B2Quality improvementIncrease bitrateSpeech analysisDigital recording/reproducingVocal tractControl quality
An audio encoder and decoder use architectures and techniques that improve the efficiency of multi-channel audio coding and decoding. The described strategies include various techniques and tools, which can be used in combination or independently. For example, an audio encoder performs a pre-processing multi-channel transform on multi-channel audio data, varying the transform so as to control quality. The encoder groups multiple windows from different channels into one or more tiles and outputs tile configuration information, which allows the encoder to isolate transients that appear in a particular channel with small windows, but use large windows in other channels. Using a variety of techniques, the encoder performs flexible multi-channel transforms that effectively take advantage of inter-channel correlation. An audio decoder performs corresponding processing and decoding. In addition, the decoder performs a post-processing multi-channel transform for any of multiple different purposes.
Owner:MICROSOFT TECH LICENSING LLC
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