A system for virtualization of a local device includes a proxy configured to report, to a remote system, a status of a local Universal Serial Bus device of the system, and to receive a transaction request designated for the local device from the remote system. A method detects a first available bandwidth, determines a first encoder bit rate according to the available bandwidth, encodes a signal at the first encoder bit rate, detects a change in the available bandwidth such that there is a second available bandwidth, determines a second encoder bit rate according to the second available bandwidth, and encodes the signal at the second encoder bit rate. The light guide plate is configured to guide the light emitted by the lamp unit, and has a peripheral face. The electronic control module may be further configured to determine a trust level of the physical sensor based on the physical output value, and determine that the trust level of the physical sensor is below a first threshold trust value. Thus, the system can induce the maximum response characteristic of a power converter only by setting the time constant of a controller without a complicated design for determining gains of the controller. The tactile-signal producing elements are located all around the player so the player will receive tactile signals from all directions and the signals can be received simultaneously so action in the video game will be accurately and realistically reproduced in the form of tactile signals.