Abstract:
A system an method for determining to select frames from a video sequence that have high visual appeal and can be coded at high quality when frame rates of coded video drop to such low levels that perceptual sensations of moving video are lost. A metric is derived from a candidate input frame, and such metric is used to determine whether to increase or decrease a weight accorded to the candidate input frame. In an embodiment, the metric may be the auto-exposure data associated with the candidate input frame.
Abstract:
In a video coding/decoding system, reference picture caches in a video coder and decoder may be partitioned dynamically based on camera and background motion can lead to improved coding efficiency and coding quality. When a camera is fixed and therefore exhibits low motion, a system may allocate larger portions of the reference picture cache to storage of long term reference frames. In this case, foreground elements of an image (for example, a person) may move in front of a relatively fixed background. Increasing the number of long term reference frames can increase the chances that, no matter where the foreground elements are within a frame currently being coded, the reference picture cache will contain at least one frame that provides an adequate prediction match to background elements within the new frame. Thus the background elements uncovered in the current frame can be coded at high quality with a low number of bits. When a camera exhibits high motion, the system may allocate larger portions of the reference picture cache to storage of short term reference frames.
Abstract:
Some embodiments provide a method for initiating a video conference using a first mobile device. The method presents, during an audio call through a wireless communication network with a second device, a selectable user-interface (UI) item on the first mobile device for switching from the audio call to the video conference. The method receives a selection of the selectable UI item. The method initiates the video conference without terminating the audio call. The method terminates the audio call before allowing the first and second devices to present audio and video data exchanged through the video conference.
Abstract:
Some embodiments provide a method for initiating a video conference using a first mobile device. The method presents, during an audio call through a wireless communication network with a second device, a selectable user-interface (UI) item on the first mobile device for switching from the audio call to the video conference. The method receives a selection of the selectable UI item. The method initiates the video conference without terminating the audio call. The method terminates the audio call before allowing the first and second devices to present audio and video data exchanged through the video conference.
Abstract:
Some embodiments provide a method for initiating a video conference using a first mobile device. The method presents, during an audio call through a wireless communication network with a second device, a selectable user-interface (UI) item on the first mobile device for switching from the audio call to the video conference. The method receives a selection of the selectable UI item. The method initiates the video conference without terminating the audio call. The method terminates the audio call before allowing the first and second devices to present audio and video data exchanged through the video conference.
Abstract:
Embodiments of present disclosure provide a mechanical interlocking system and a switchgear comprising the mechanical interlocking system. The mechanical interlocking system comprises: a first interlocking assembly coupled to a first circuit breaker and being switchable between a locked state and a released state, wherein the first interlocking assembly prevents the first circuit breaker from being closed in the locked state and allows the first circuit breaker to be closed in the released state; a second interlocking assembly coupled to a second circuit breaker and being switchable between a locked state and a released state, wherein the second interlocking assembly prevents the second circuit breaker from being closed in the locked state and allows the second circuit breaker to be closed in the released state; and an intermediate assembly arranged between the first circuit breaker and the second circuit breaker and comprising: a first transfer member arranged to couple the first circuit breaker to the second interlocking assembly and configured to switch the second interlocking assembly into the locked state in response to the first circuit breaker being closed, and a second transfer member arranged to couple the second circuit breaker to the first interlocking assembly and configured to switch the first interlocking assembly into the locked state in response to the second circuit breaker being closed. In the present disclosure, the mechanical interlock prevents the circuit breakers from being closed simultaneously under any circumstances, and has advantages of simplicity and reliability.
Abstract:
A method and apparatus for adapting transmission to improve quality of service in a mobile wireless device that includes an application processor and a transceiver. An application service connection is established between the mobile wireless device and a remote device. The transceiver in the mobile wireless device monitors real time properties of a radio frequency access link that transports packets for the application service between the mobile wireless device and a wireless communication network. The transceiver provides local feedback to the application processor of updated values of the monitored real time properties. The application processor adjusts packet data generation and transmission in response to the updated values to manage quality of service for the application service connection. Packet data transmission adjustment includes active management of queues in the transceiver by the application processor, selectively dropping packets based on packet classifications and the local feedback information provided to the application processor.
Abstract:
A bus-duct comprises a housing (101) comprising a plurality of walls (1011) and an internal chamber surrounded by the plurality of walls(1011); a plurality of insulation supports (102) arranged on at least one of the plurality of walls (1011); and at least one tubular busbar (103) arranged in the internal chamber via the plurality of insulation supports (102), each of the at least one tubular busbar (103) comprising a pair of connection ends (1031)each adapted to be electrically coupled to a respective one of the high-voltage devices. The current carrying capacity of the tubular busbar is higher than that of the conventional busbar with rectangular cross section in the case of the same cross-sectional area. With the tubular busbar, since there are no sharp corners and reduced eddy current effects, the distance between the busbars corresponding the phases is allowed to be smaller without reducing the insulation performance. In this way, the bus-duct can be made more compact to meet the needs of miniaturized high-voltage devices. An associated manufacturing method and a power transmission and distribution system are also provided.
Abstract:
A video coding/decoding system builds implied reference frames from a plurality of reference frames developed during coding. Coded data of reference pictures are decoded and stored in a reference picture cache. An implied reference frame may be derived from a plurality of reference frames and may be stored in the reference picture cache. Thereafter, coding of new input data may proceed using the implied reference frame as a source of prediction. The method may be used to identify visual elements such as background elements that may persist in video over a longer period that can be captured by the system under conventional reference frames assembly and eviction. Implied reference frames may be built at both an encoder and a decoder to serve as sources of prediction.