125results about How to "Control delay" patented technology

A technique for determining a data window size allows a set of predicted blocks to be transmitted along with requested blocks. A stream enabled application executing in a virtual execution environment may use the blocks when needed.

A method for synchronized playback of wireless audio and video is applicable to a playback system. The method for synchronized playback includes steps of receiving and processing multimedia data by the playback system, in which the multimedia data includes video data and audio data; wirelessly transmitting the audio data to a loudspeaker and meanwhile holding the video data for a threshold time; and finishing the transmission of the audio data when the threshold time is reached, so that the video data and the corresponding audio data are synchronously played. The method for synchronized playback can control the delay caused by the wireless audio transmission, thus achieving the objective of synchronously playing the audio and video data.

A coaxial speaker assembly (10) with reduced sound distortion, sound time delay, and polar response distortion. The coaxial speaker assembly (10) includes a high-frequency speaker system (16) mounted coaxially with and fitting within a lower-frequency speaker system (14). A baffle (50) is secured to a diaphragm (48) of the high-frequency speaker system (16). A step-down ledge (52) is circumferentially positioned adjacent to the baffle (50) and extends outwardly therefrom. A portion of the sound waves emanating from the high-frequency diaphragm (48) are reflected off the step-down ledge (52).

An apparatus and method for switching data packet flows by assigning schedules to guaranteed delay and bandwidth traffic. Scheduled bandwidth is subtracted from the available bandwidth, and the remaining unscheduled bandwidth is available for standard “best-efforts” packet transmissions, or other guaranteed packet flows. Guaranteed bandwidth is assigned on a schedule basis, and packet flows are assigned schedules which are mutually acceptable to both transmitters and receivers. Flows transmit and expect to receive packets in accordance with their assigned schedules. Schedules are negotiated between packet transmitter applications and packet receiver applications. During scheduled periods, packets sent by the packet transmitter are directly and immediately forwarded to the assigned packet receiver. Other traffic destined for the receiver is placed in a delay queue, and other packets are not transmitted to the packet receiver during the assigned schedule, as long as the transmitter is still sending guaranteed packets.

The invention provides a live broadcast data stream decoding synchronization method, device and equipment. The method comprises the following steps: calculating a maximum timestamp according to specified parameters; Comparing the timestamp of the non-first-frame audio frame to be added into the audio cache queue with the maximum timestamp; if the timestamp of the non-first-frame audio frame is smaller than the maximum timestamp, storing the non-first-frame audio frame in the audio buffer queue, and if the timestamp of the non-first-frame audio frame is larger than the maximum timestamp, discarding the non-first-frame audio frame; And obtaining audio frames from the audio cache queue, and decoding to obtain audio data. According to the method, the time upper limit value corresponding to thetime stamp of the audio frame in the corresponding audio cache queue is dynamically adjusted, the audio frame with the time stamp exceeding the time upper limit value is discarded, the audio cache queue is reduced, and then the video data is synchronized to the audio data, so that the purpose of accurately controlling the live video delay is achieved.

A surveillance camera terminal includes a wireless communication means that performs wireless communication with another terminal located near the subject terminal either directly or via another terminal, an imaging means that images part of a surveillance area assigned to the subject terminal with an imaging visual field positioning the part of the surveillance area, an imaging visual field control means that adjusts the imaging visual field of the imaging means to a desired region in the surveillance area, an object extracting means that extracts an object being imaged by processing a frame image taken by the imaging means, a tracking means that tracks the object extracted by the object extracting means in the surveillance area, a handover means that hands over the object being tracked by the tracking means, and a wireless communication path forming means.

An approach for minimizing queueing delay of packets is disclosed. M number of queues are configured to store packets. A memory stores a search order table that has table entries corresponding to the M queues. Specifically, the table entries store values that correspond to relative positions of the M queues and that are selected based upon a transmission constraint of the communication system. A scheduler is coupled to the memory and is configured to schedule transmission of the packets stored in the M queues based upon the search order table. According to one embodiment of the present invention, this queueing mechanism is applied in a satellite communication system with transmission constraints to the downlink cells.

A telecommunications system, for communicating data to and from a mobile device. The system comprises a plurality of repeater nodes, each repeater node having a transceiver unit operable to transmit and receive data to or from one or more other of the repeater nodes or the control node or the mobile device within a predetermined range, and processing unit operable to control the transceiver unit. The system also comprises a control node operable to transmit data in a downstream direction from the control node to the mobile device via the repeater nodes and to receive data from the mobile device transmitted in an upstream direction from the mobile device to the control node via the repeater nodes. The control node, the mobile device and the plurality of repeater nodes are arranged to communicate the data in the downstream direction from the control node to the mobile device via the repeater nodes using a time frame divided into a plurality of time slots, and to communicate the data in the upstream direction from the mobile device to the control node via the repeater nodes using the time frame, and the time slots of the time frame are allocated to the repeater nodes to the effect that each repeater nodes transmits to another repeater node in one of the upstream or the downstream directions in a time slot which is a minimal time from the time slot in which the other repeater node transmits in the upstream or downstream direction. The telecommunications system reduces the time taken for upstream or downstream data to be transmitted from a mobile terminal within the network, via the repeater nodes to the control node.

A channel detection system includes an interferometer coupled to a spectrum analyzer to differentiate additive spontaneous emission (ASE) noise from optical channels in a dense wave-division multiplex (DWDM) signal. It is assumed that channels, if present, are centered at frequencies corresponding to a standardized channel grid. The relative delay of the interferometer is chosen to be greater than the coherence time of the ASE noise but less than the coherence time of the channels with the interferometer's free spectral range set to an integer divisor of the channel-to-channel frequency spacing of the grid such that active channels experience a high degree of interference. The phase delay of the interferometer is then adjusted to maximize the interference at each grid-aligned frequency. The spectrum-analyzed outputs are compared (e.g., subtracted from one another and then thresholded) to determine the channels present in the DWDM signal.

A brake fluid pressure control apparatus of a vehicle includes a hydraulic brake in which the fluid pressure of a brake cylinder for a wheel is controlled so as to retard the rotation of the wheel, and a hydraulic actuator capable of controlling the fluid pressure of the brake cylinder. An actuator controller feedback-controls the hydraulic actuator so that the actual fluid pressure of the brake cylinder approaches a target fluid pressure determined in accordance with a braking requirement. The actuator controller determines a control gain used when determining a control command value to be sent to the hydraulic actuator, based on at least one of the temperature of a working fluid and a slipping state of the wheel.

The invention discloses an end-to-end time delay guarantee transmission scheduling method oriented to an industrial backhaul network. The end-to-end time delay guarantee transmission scheduling method oriented to the industrial backhaul network comprises the two processes of a concentrated time delay distribution process and a segmented time delay guarantee forwarding process. The distribution method comprises the steps that a time delay distribution value of each segment link is calculated by a network manager according to time delay requests and transmission path loading conditions of a business flow, and the time delay requests and business header information are sent to network switches. The forwarding of data business is achieved by the network switches according to the time delay requests of specific business, wherein firstly, business data are placed in a corresponding delay priority buffer queue; then, the data in the time delay priority buffer queue are sent to a Crossbar switching matrix by the corresponding network switch through an experiment priority scheduling mechanism; finally, the timely transmission of the business in the corresponding buffer queue is guaranteed by the adoption of a Crossbar scheduling mechanism. According to the end-to-end time delay guarantee transmission scheduling method oriented to the industrial backhaul network, the fine-grained time delay control mechanism is adopted, so that the supportability and the determinacy of the business end-to-end time delay are improved.

The present invention relates to an integral printhead assembly for use in association with an industrial printing apparatus. The integral printhead assembly is a self-contained unit which can be quickly removed and replaced with another assembly with minimum downtime to the printing apparatus.