摘要:
A technique for managing the streaming of digital video content involves providing a unicast stream to a client in response to the playout status of the unicast stream at the client. In particular, a unicast stream is provided to a client based on whether or not the unicast stream is intended for real-time playout at the client. In order to preserve valuable network resources, if the client does not intend the unicast stream for real-time playout, the unicast stream is not provided to the client. Network resources can also be conserved by utilizing one session between a stream server and a client to support more than one active unicast stream between the stream server and the client in the case where at least one of the active unicast streams is not intended for real-time playout at the client.
摘要:
A technique for managing video content for a video on demand (VOD) session involves replacing trick mode content with pre-defined replacement content when a trick mode command is executed. The replacement content is displayed in a clear and intelligible manner (e.g., at normal speed) even though a trick mode command, such as fast forward, reverse, or fast reverse, has been executed. In an embodiment, the replacement content is a replacement advertisement, which may be in the form of a moving image that is displayed as normal speed or a fixed image.
摘要:
A technique for managing session setup requests involves operating in a normal mode when the arrival rate of session setup requests is below a normal transition boundary, and transitioning from the normal mode to a coalescing mode when the arrival rate of session setup requests rises above a coalescing transition boundary. In the normal mode, the session manager processes each of the session setup requests individually; whereas in the coalescing mode, multiple session setup requests are batched and processed collectively. The session manager may be transitioned from the normal mode to the coalescing mode when the session setup request arrival rate rises above a coalescing transition boundary, and the session manager may be transitioned from the coalescing mode to the normal mode when the session setup request arrival rate falls below a normal transition boundary.
摘要:
A technique for managing session setup for video on demand sessions involves caching information related to session setup for a session manager and then utilizing the cached information to setup a video on demand session for a client in response to a session setup request that is received from the client. Because information related to session setup is cached for the session manager, the session manager can utilize the information to establish a session without having to exchange messages with other video on demand elements, in particular other servers in the video on demand network. Reducing or eliminating the number of messages exchanged between video on demand elements enables video on demand sessions to be quickly and efficiently setup.
摘要:
A technique for managing session setup for video on demand sessions involves caching information related to session setup for a session manager and then utilizing the cached information to setup a video on demand session for a client in response to a session setup request that is received from the client. Because information related to session setup is cached for the session manager, the session manager can utilize the information to establish a session without having to exchange messages with other video on demand elements, in particular other servers in the video on demand network. Reducing or eliminating the number of messages exchanged between video on demand elements enables video on demand sessions to be quickly and efficiently setup.
摘要:
A technique for managing the streaming of digital video content involves providing a unicast stream to a client in response to the playout status of the unicast stream at the client. In particular, a unicast stream is provided to a client based on whether or not the unicast stream is intended for real-time playout at the client. In order to preserve valuable network resources, if the client does not intend the unicast stream for real-time playout, the unicast stream is not provided to the client. Network resources can also be conserved by utilizing one session between a stream server and a client to support more than one active unicast stream between the stream server and the client in the case where at least one of the active unicast streams is not intended for real-time playout at the client.
摘要:
A direct conversion radio-frequency (RF) receiver includes a controller and an adaptive continuous-time filter. The adaptive continuous-time filter receives a multiple-bit control signal generated by the controller to adjust a characteristic of the continuous-time filter. The controller generates the multiple-bit control signal in response to process variation in the semiconductor material used to implement the controller and the adaptive continuous-time filter. A method for tuning an adaptive continuous-time filter comprises determining a RC time constant, converting the RC time constant to a digital word, comparing a select bit of the digital word to a respective bit of a predetermined reference word to generate a control bit, applying the control bit to an adjustable element to modify the RC time constant, repeating the determining, converting, comparing and applying steps until the control bits generate an output word and providing the output word to the adaptive continuous-time filter.
摘要:
The anterior composite matrix dental restoration system provides a matrix for holding a composite filling material in place as it cures, and a tool for holding the matrix in place during the curing of the filling material. The matrix comprises a thin, flat, flexible, and transparent sheet of plastic material with parallel tubular extensions on the opposite ends. The distal ends of the specialized forceps tool are inserted into the tubular ends of the matrix and used to install, hold, and remove the matrix. The relatively small and narrow tool greatly increases the comfort of both patient and dentist or dental technician by precluding need to insert and hold the fingers in the mouth of the patient to install, hold, and remove the matrix. The matrices may be provided in different sizes, with at least the tubular end components being optionally color coded to indicate the corresponding size.
摘要:
An electrosurgical instrument is provided for cauterization and/or welding of tissue of varying impedance, thickness, compressibility, density, vascularity, etc., especially in the performance of endoscopic procedures. The instrument provides two electrodes of different electrical potentials. One electrode is moveable with respect to the other electrode to vary the distances between the electrodes and thus the impedance of the tissue as presented to the generator. The electrode distances may be varied by an automated or user controlled device.
摘要:
An embossing apparatus comprises pairs of rotary embossing drums (230) driven by respective servo motors (260). The drums have an embossing formation. A conveyor feeds blanks to the embossing drums (230). A control senses the position and speed of the blank and the position and speed of the drum and applies a correction to the rotational position of the drum such that the blank will engage the embossing formation in the correct position as it travels past the formation.