Abstract: Systems and methods are described in which the location of a tap on the body of a handheld device is determined in real time using data streams from an embedded inertial measurement unit (IMU). Taps may be generated by striking the handheld device with an object (e.g., a finger), or by moving the handheld device in a manner that causes it to strike another object. IMU accelerometer, gyroscopic and/or orientation (relative to the magnetic and/or gravitational pull of the earth) measurements are examined for signatures that distinguish a tap at a location on the body of the device compared with signal characteristics produced by taps at other locations. Neural network and/or numerical methods may be used to perform such classifications.

Abstract: Systems and methods are described in which user reactions to one or more interactions initiated by a handheld device are a basis for controlling the broadcasting of serial content on a content delivery device such as a television or tablet. Interactions initiated on the handheld device may include visual, acoustic and/or haptic components based on the one or more contexts of concurrent (i.e., current or recently broadcast) or ensuing (i.e., not yet broadcast) content. User reactions may be determined based on device movements or orientations (sensed by a camera or inertial measurement unit), verbal replies (sensed by a microphone), and/or pushbutton indications. Based on user reactions and/or predetermined preferences, serial content may be replayed, paused, bypassed, played in slow-motion, or played in a so-called “fast forward” mode. Systems and methods may provide simple and intuitive methods to control serial content delivery that may be particularly well-suited for young children.