摘要:
An apparatus and method provide effective video transmission in a communication system that supports an Internet Protocol Television (IPTV) service between heterogeneous networks. A request for a contiguous service is received from a terminal during a mid-point of a video stream. A delay time that may be generated when the video contents are transmitted is estimated for each of a patching type and a fast broadcasting type. A transmission type with a shorter delay time for the video contents is determined based on the estimated delay time for each of the patching type and the fast broadcasting type. And the video contents are transmitted to the terminal by applying the determined transmission type.
摘要:
A method and apparatus perform channel scanning in a wireless communication system. A signal intensity of an Access Point (AP) is compared with a scanning threshold, when the AP signal intensity not less than the scanning threshold, a channel scanning schedule list is generated in consideration of a scan time based on a passive channel scan scheme and a scan time based on an active channel scan scheme. The channel scanning is performed every channel scanning time, according to the channel scanning schedule list.
摘要:
A method and apparatus perform channel scanning in a wireless communication system. A signal intensity of an Access Point (AP) is compared with a scanning threshold, when the AP signal intensity not less than the scanning threshold, a channel scanning schedule list is generated in consideration of a scan time based on a passive channel scan scheme and a scan time based on an active channel scan scheme. The channel scanning is performed every channel scanning time, according to the channel scanning schedule list.
摘要:
Semiconductor device manufacturing equipment has a vacuum system that enhances the fluency of the gas being discharged from a chamber of the equipment. The vacuum system has a vent line, and a throttle valve that includes a vent line opening and closing member oriented so that it is readily opened by a concentrated flow of gas in the vent line. The vacuum system may include a heating unit that heats the vent line through which the gas passes. Still further, a bend in the vent line upstream of the vent line opening and closing member may have a gently curved shape and/or may subtend an angle of less than 90°. As a result, the efficiency of the ventilation of the process chamber is improved, making it easier to control the pressure of the process chamber and minimizing the contamination of the throttle valve and the vent line.
摘要:
A system for transmitting and receiving a wideband speech signal includes an A/D converter for receiving an analog speech signal to convert it into a digital speech signal, encoding a difference between a baseband speech signal and a standard baseband between a synthesized standard baseband signal, and an IP network interface for multiplexing the coded standard and additional baseband signals and enhancement residual band signal.
摘要:
Embodiments disclosed herein generally include an alignment assembly for aligning a shadow frame on a susceptor. For producing large area flat panel displays or solar panels, the shadow frame that protects the areas of the susceptor not covered by the substrate from deposition may be so large that the shadow frame bends and doesn't properly align. By utilizing an alignment assembly having one or more ball bearings, the shadow frame may roll on the susceptor to a proper alignment position. Thus, the shadow frame may be prevented from bending and also align on the susceptor.
摘要:
The present invention relates to a transmitter and a receiver for speech coding and decoding by using an additional bit allocation method. The transmitter and the receiver according to the present invention realize a voice communication service of high quality by using additional bits permitted in system requirements while using a conventional speech coder as it is. In addition, the transmitter and the receiver according to the present invention have an advantage in that they enable insertion of additional quantization blocks while not changing the structure of the conventional standard speech coder, since they allocate additional bits by applying a multi-stage quantization procedure not in a speech signal domain but in a parameter domain.
摘要:
According to example embodiments, there is provided a method of cleaning a semiconductor device manufacturing apparatus. In the method, a fluorine-containing gas is provided into a chamber to clean a byproduct formed on a surface of a chamber during formation of a layer structure therein. A material is provided into the chamber to chemisorb the material on the surface of the chamber. The material is substantially similar to or the same as a source gas for forming the layer structure. A plasma is generated in the chamber, and the chamber is purged.