Abstract: [Object] To provides a controller capable of switching a video so that the video is not distorted on the receiving side when the video is transmitted using IP multicast [Solution] There is provided a controller including a bandwidth reservation unit configured to, when an instruction given to a receiving device that receives a first video stream transmitted via IP multicast to receive a second video stream after receiving the first video stream is acquired, acquire information on a status of a network topology and a transmitted video stream and to reserve a network bandwidth for transmitting the second video stream in addition to the first video stream, and a reception instruction unit configured to send out an instruction to receive the second video stream to the receiving device by using the network bandwidth reserved by the bandwidth reservation unit.

Abstract: There is provided an information processing device including a score calculating unit configured to calculate a score indicating a relationship between pieces of content, a layout-information generating unit configured to extract content, which is highly related to content selected by a user from content displayed toward the user, based on the score and to generate layout information defining a layout in which the extracted content is emphasized, and a layout-information output unit configured to output the layout information to a display controller for displaying the content toward the user.

Abstract: [Object] To lower a mechanical resonance sharpness and reduce oscillations near a minimum resonance frequency, to thereby improve the sound quality.

Abstract: A method of making an optical member including high refractive index layers and low refractive index layers, which are each relatively thin as compared with an optical length, and disposed alternately in the lateral direction with respect to an optical axis. Each width of the high refractive index layers and the low refractive index layers is equal to or smaller than the wavelength order of incident light.

Abstract: A laser light power controlling method is provided which comprises the steps of irradiating onto an optical disc a laser light generated by a laser source driven under a data write signal; detecting a reflected portion of the laser light irradiated onto the optical disc; and detecting an undershoot of a detection signal of the reflected laser light and controlling the power of the laser light in accordance with the amount of the detected undershoot. Also, a method for writing data into an optical disc is provided which comprises the steps of irradiating onto an optical disc a laser light generated by a laser source driven under a data write signal; detecting a reflected portion of the laser light irradiated onto the optical disc; and detecting an undershoot of a detection signal of the reflected laser light and discriminating the level of the undershoot with reference to a predetermined threshold.