Title: Method for fast- and slow-motion reproduction of video signals stored in a succession of parallel tracks on a record medium

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Abstract: In order to provide fast- and slow-motion reproduction of video signals a tape is played back at a different velocity, at which the scan traces provide acceptable signals for only a portion of each track at a time, the acceptably picked-up picture lines of these track portions are temporarily stored (others being excluded) and then played back under conditions satisfying television reception standards, in an order determined by an address made up of the line number and a track and field identification provided in response to track and field beginning pulses recorded on the tape. The address can be recorded together with the video signals or can be generated by counting means during the reproduction of the video signals. The tape transport speed is automatically adjusted slightly, if necessary, with respect to the speed setting, to avoid duplicate storage of corresponding lines in successive fields at the expense of omission of other lines. Where it is satisfactory to limit the slow-motion and fast-motion tape speed to a number of particular values, the temporary storage and playback can be controlled by a read-only memory that has its content selected by the tape speed setting.


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