Abstract: A video signal processing system having a plurality of units to be operated in parallel with each other. Each unit has an input selector for selecting one video input and output selectors for selecting one video output. The selected video input is initially stored in a memory and is processed in accordance with a program which is stored in another memory in a sequencer to execute a specific video effect. The video signal subject to the video effect is supplied to the output selectors and delivered from the selected output selector. This processing is performed in parallel with respect to the units in accordance with respective programs stored in the respective memories in the respective sequencers.

Abstract: A time-axis of a digital video-signal is converted to a standard time-axis by changing a clock signal contained therein to a standard clock signal and by locking phases of input synchronizing signals contained therein onto the phase of the standard clock signal through a memory for alternately writing and reading the digital video signal at one half of the period of the standard clock signal. As a result, the time-axis correction of the digital video signal is efficiently effected through the memory having a small capacity and a simplified controlling arrangement.

Abstract: A system for measuring the state of charge of a storage battery is disclosed which corrects charging and discharge electrical quantities of the battery in view of temperature and charging efficiency of the battery, and the like to precisely measure the state of charge thereof by digital-operation. There is also disclosed a system correcting, by digital-operation, the variation in capacity of the battery due to the variation in life of the battery and/or the self-discharge thereof as well, to thereby measure the state of charge with higher precision.