摘要:
A method and apparatus for generating a proxy signature on a right object, and a method and apparatus for issuing a proxy signature certificate. The right object proxy signature method includes receiving a proxy signature certificate in which authority for right object conversion is specified, from a right issuer; receiving a right object from a first apparatus; signing the right object; and transmitting the signed right object and the proxy signature certificate to a second apparatus. Accordingly, by allowing a right object to be signed by a third right object proxy signature apparatus, not by a right issuer, users can freely share their own content between a variety of apparatuses, and the right issuer can reduce the load associated with the conversion and signature of right objects.
摘要:
A method and apparatus for decoding a right object and a method and apparatus for sharing contents using the same, the method of sharing contents including: receiving a Digital Rights Management (DRM) agent to interpret a right object corresponding to the contents; operating the received DRM agent to generate a coding key and a decoding key to code and decode the right object, respectively; decoding the received right object by using the decoding key and extracting a contents decoding key in order to decode the content; and decoding the contents received from a predetermined device by using the contents decoding key. Therefore, coded contents can be shared even in different DRM systems, and since DRM agent may be provided as software at the time the content is shared, the DRM agent need not be originally included by a device manufacturer, thereby reducing a development cost.
摘要:
A semiconductor device includes a substrate, a buffer layer on the substrate, and a plurality of nitride semiconductor layers on the buffer layer. The semiconductor device further includes at least one masking layer and at least one inter layer between the plurality of nitride semiconductor layers. The at least one inter layer is on the at least one masking layer.
摘要:
A semiconductor device includes a buffer structure on a silicon substrate, and at least one gallium nitride-based semiconductor layer on the buffer structure. The buffer structure includes a plurality of nitride semiconductor layers and a plurality of stress control layers that are alternately disposed with the plurality of nitride semiconductor layer. The plurality of stress control layers include a IV-IV group semiconductor material.
摘要:
A jig for use in etching supports an etching target while an etching process is performed and surrounds a remaining region of the etching target except for a portion of the etching target, so as to expose the portion of the etching target. Accordingly, a stable support of the etching target during the etching process may be provided, and thus an etching of an undesired region may be prevented, and a stable production yield may be accomplished.
摘要:
A high electron mobility transistor (HEMT) includes a substrate, an HEMT stack spaced apart from the substrate, and a pseudo-insulation layer (PIL) disposed between the substrate and the HEMT stack. The PIL layer includes at least two materials having different phases. The PIL layer defines an empty space that is wider at an intermediate portion than at an entrance of the empty space.
摘要:
Light emitting devices and methods of manufacturing the light emitting devices. The light emitting devices include a silicon substrate; a metal buffer layer on the silicon substrate, a patterned distributed Bragg reflector (DBR) on the metal buffer layer; and a nitride-based thin film layer on the patterned DBR and regions between patterns of the DBR.
摘要:
A semiconductor buffer structure may include a silicon substrate and a buffer layer that is formed on the silicon substrate. The buffer layer may include a first layer, a second layer formed on the first layer, and a third layer formed on the second layer. The first layer may include AlxInyGa1-x-yN (0≦x≦1, 0≦y≦1, 0≦x+y≦1) and have a lattice constant LP1 that is smaller than a lattice constant LP0 of the silicon substrate. The second layer may include AlxInyGa1-x-yN (0≦x
摘要翻译:半导体缓冲结构可以包括硅衬底和形成在硅衬底上的缓冲层。 缓冲层可以包括第一层,形成在第一层上的第二层和形成在第二层上的第三层。 第一层可以包括Al x In y Ga 1-x-y N(0 @ x @ 1,0 @ y @ 1,x @ x + y @ 1),并且具有小于硅衬底的晶格常数LP0的晶格常数LP1。 第二层可以包括Al x In y Ga 1-x-y N(0 @ x <1,0
摘要:
According to an example embodiment, a power device includes a substrate, a nitride-containing stack on the substrate, and an electric field dispersion unit. Source, drain, and gate electrodes are on the nitride-containing stack. The nitride-containing stack includes a first region that is configured to generate a larger electric field than that of a second region of the nitride-containing stack. The electric field dispersion unit may be between the substrate and the first region of the nitride-containing stack.
摘要:
A method of recognizing speech is provided. The method includes the operations of (a) dividing first speech that is input to a speech recognizing apparatus into frames; (b) converting the frames of the first speech into frames of second speech by applying conversion rules to the divided frames, respectively; and (c) recognizing, by the speech recognizing apparatus, the frames of the second speech, wherein (b) comprises converting the frames of the first speech into the frames of the second speech by reflecting at least one frame from among the frames that are previously positioned with respect to a frame of the first speech.