A system, method and computer program product for communicating between a primary audio video device and other audio video devices comprising: detecting orientation and position of the primary audio video device; detecting a distance between the primary audio video device and a primary subject in focus on the primary audio video device; locating other networkable audio video devices for communication; receiving subject data for a real time video of a subject from one or more of the located networkable audio video devices; determining from subject data which networkable audio video devices are near the primary subject; determining one or more primary subject audio video devices for use in recording audio for a video; and synchronizing determined one or more primary subject audio video devices for recording audio when one or more of the audio video devices is recording video of the primary subject.

A signal processing apparatus includes: a difference signal acquirer configured to obtain a difference signal reflecting a change in an input signal at a preset time interval based on a reference signal; a signal amplifier configured to amplify the difference signal; and a signal restorer configured to generate an output signal by converting the amplified difference signal to a digital signal and the digital signal.

A 3D depth camera module, including a light transmitting portion having a laser for emitting light, and having a diffractive optical element for passing the light therethrough such that the light reaches a subject with a preset pattern; a light receiving portion configured to receive the light reflected from the subject; an analyzing portion configured to analyze a 3D shape of the subject, based on a shifted degree of the reflected light; and an operating portion configured to move part of the light transmitting portion such that a position of one region of the subject where the light reaches is changed. Further, the operating portion moves at least part of the light transmitting portion by a predetermined length being set to restrict repetitive arrival of the light onto one region of the subject; the diffractive optical element includes a plurality of spots spaced from each other by a predetermined spaced interval between two adjacent spots of the diffractive optical element; and the predetermined length is smaller than the predetermined interval.

In an imaging array having a plurality of pixel sensors arranged in a plurality of rows and columns, pixel data being read out on column lines of the array, a column line voltage clamp circuit for column lines of the array includes a master voltage clamp circuit coupled to provide a reference voltage clamp level on a reference node, and a slave voltage clamp circuit coupled to each column line in the imaging array, each slave voltage clamp circuit configured to clamp voltage on the column line to a column voltage clamp level derived from the reference voltage level.

According to some embodiments, systems, methods, apparatus, and computer program code for controlling a video camera to capture video associated with an event are provided which use historical or predictive data. In some embodiments, historical event information and participant information is received. Video camera configuration and position data is received, as well as current event data. The current event data may be received substantially in real time from the event. Video camera control signals are generated based on at least one of the event information, the participant information, and the current event data. The control signals are transmitted to a video camera to control the operation of the video camera.