Spin Physics, Inc.

Eastman Technology, Inc.

Eastman-Kodak Company

Robert A Lentz

James U Lemke

James A Bixby

Charles E Wright

A system for playback of segmented video information on a tape employs an ancillary recording medium which is rotationally driven at the rotational rate of a primary segment scanning apparatus. Each segment of a video field is recorded in a respective track of the ancillary medium, the information of one field being recorded over the information of another field. By recording only signals of a predetermined quality on the ancillary recording medium, playback of video information from the ancillary medium will produce a coherent display on a display monitor, regardless of the rate at which the tape is run. This is possible because of the one-to-one correspondence between the rotary rates of the scanner and the ancillary medium. Each coherent display is comprised of information from one or a number of video fields. To determine whether signals to be recorded are of the predetermined quality a coarse and a fine measure of signal quality are provided and logically combined. The coarse measure is provided by use of respective identifier tones for the field segments which are played, the purity of the played tones being somewhat determinative of playback signal quality. The fine measure of signal quality is determined by comparing the playback sync rate with a reference sync rate, the error therebetween corresponding to signal quality.

Coarse and fine control of segmented video playback apparatus with

A system for recording segmented video fields with segment identification codes includes circuitry to encode each segment of a given odd or even field with a different identification code. Further, each corresponding segment of all the other odd or even fields is likewise encoded with the same identification code. Thus, the first segment of any odd or even field has the same identification code which is different from any other identification code appearing for any other segment in any other odd or even field. The same applies to the second and all other segments.

Segmented video recording with segment identification codes

A system for playback of segmented video information on a tape employs an ancillary recording medium which is rotationally driven at a rotation rate of the primary segment scanning apparatus. Each segment of a video field is recorded in a respective track of the ancillary medium, the information of one field being recorded over the information of another field. By recording only signals of a predetermined quality on the ancillary recording medium, play back of video information from the ancillary medium will produce a coherent display on a display monitor, regardless of the rate at which the tape is run. This is possible because of the one-to-one correspondence between the rotary rates of the scanner and the ancillary medium. Each coherent display is comprised of information from one or a number of video fields.

Segmented video playback apparatus with ancillary recording medium

A wholly self-contained video camera is disclosed as being cartridge-loaded with magnetic tape for picture taking. Sweep rates for the camera sensor are slaved to the tape drive of the camera; and little or no speed regulation is associated with the camera tape drive. The tape employed in the camera has a pre-recorded signal which is detected for sweep rate control purposes. Playback of video information recorded by the camera is accomplished by running the tape during playback at the 'pre-record' speed.

Magnetic-tape cartridge-loaded portable video camera using prerecorded

Time base instability of signals in a train thereof is corrected by use of analog shift registers. As employed in the correction of time base instability of video signals, plural analog shift registers are used. The same clock rate is used, respectively, to clock video signals into and out of analog shift registers. The clock rate is set so that samples of a video signal which has a normal duration may load all stages of an analog shift register within the duration of the normal signal. Thus, samples of a stretched signal fully load all stages of the analog shift register, the trailing part of such stretched signal being discarded. Conversely, a video signal which has been compressed, although being fully loaded into the analog shift register, loads less than all of the analog shift register stages.

Apparatus for modifying the time base of signals

Time base instability of signals in a train thereof is corrected by use of analog shift registers. As employed in the correction of time base instability of video signals, plural analog shift registers are used. Two clock rates are used, respectively, to clock video signals into and out of the analog shift registers. The clock-in rate is set so that samples of a video signal which has been stretched a predetermined amount may load all stages of an analog shift register within the duration of the stretched signal. The clock-out rate is set to unload all stages of an analog shift register within the nominal duration of a video signal.

Time base instability of signals in a train thereof is corrected by use of analog shift registers. As employed in the correction of time base instability of video signals, paired analog shift registers are used. While one register has samples of one video line signal clocked into it at a rate corresponding to its time base instability, the other register clocks out, at a uniform rate, analog signals of the previous line, and vice versa.

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Del Mar, CA, United States of America

Robert A Lentz