Abstract: In general, a method includes comparing a first input signal with a second input signal to produce an output signal. The first input signal corresponds to an amount of light detected by a sensor, and the second input signal corresponds to an aggregated value of the output signal. The method may also include aggregating the output signal in a digital accumulator and converting a digital signal from an output of the digital accumulator to an analog signal.

Abstract: In general, a method includes comparing a first input signal with a second input signal to produce an output signal. The first input signal corresponds to an amount of light detected by a sensor, and the second input signal corresponds to an aggregated value of the output signal. The method may also include aggregating the output signal in a digital accumulator and converting a digital signal from an output of the digital accumulator to an analog signal.

Abstract: A method for connecting a local and a remote device using a plurality of telephone lines is disclosed. The remote device calls the local device on one of the telephone lines to establish a first telephone connection. The local device sends the other telephone numbers to the remote device on the first telephone connection. The remote device can then establish additional telephone connections. Once connections are established, the two devices can divide a data stream into smaller components. These components are sent via these telephone connections. These components are received by the receiving devices and combined to recover the original data stream. One of the application of the present invention is videophone.