Abstract: A receiver apparatus which receives streaming data transmitted from a distribution server via a network, includes: a comparison section configured to compare a time when a re-transmission process of the received streaming data is estimated to be completed with a time when an error correction process of the received streaming data is estimated to be started, when the error correction process can not be applied to the streaming data; and a re-transmission request section configured to send the distribution server a first re-transmission request for requesting that the streaming data be re-transmitted, when it is determined that the time when the re-transmission process is estimated to be completed is going to be earlier than the time when the error correction process is estimated to be started.

Abstract: A WebTV (a WebTV main unit) has: a display controller for displaying a Web page including a plurality of link information in which a linked page is set and which is divided into a plurality of areas on a display unit; an area switcher for inputting an area switching command for switching an active area which is an area in a state where a user can select into the display controller; and a link switcher for inputting a link information switching command for switching active link information which is link information in a state where the user can select in the active area into the display controller based on a link information switching signal.

Abstract: A user operates a remote control to enter an authentication code shared by a plurality of radio transmission devices performing radio transmission. Remote control transmission/reception unit 1 converts an infrared signal received from the remote control to an electric signal, and extracts the authentication code from the electric signal. The authentication code is recorded on an authentication code record region in a nonvolatile storage region. In an authentication communication mode, a radio unit encrypts a radio unit MAC address with the authentication code used as a key, and transmits it. Further, the radio unit decrypts the radio unit MAC address returned from the radio transmission device of the opposite party of the transmission with the authentication code used as the key. The radio transmission device obtains the radio unit MAC address of the opposite party of the transmission, and ends the authentication mode.

Abstract: An infrared emission module is adjacently opposed to an infrared receiving unit. In a control unit, a switching unit forms a transmission path of a radio control signal between a central control unit and an infrared control unit. The central control unit in the control unit provides a radio unit MA address. The radio unit MAC address is transferred to an infrared transmitting unit via the infrared control unit, and is emitted from an infrared emission module. The infrared signal emitted from the infrared emission module is received by the infrared receiving unit. The control unit decrypts the infrared signal, and extracts the radio unit MAC address of the opposite party of transmission to end an authentication mode.