Video information recording and reproduction

A method of recording video information on a recording medium having a multiply coiled recording track, and subsequently displaying said video information at a display scan rate, an improvement for reducing the size of the recording medium relative to a size requisite for a recording at said display scan rate, comprising in combination the steps of:

• providing signals which include said video information in a series of image fields synchronized at a scan rate lower than said display scan rate;
• recording said signals including said image fields on said recording medium at a first relative recording medium velocity and in accordance with the arithmetic progression
• u = a + (n - l)d
• wherein:
• u denotes the numbers of the image fields which are recorded,
• a and d are positive integers above zero, and
• n is the order of any term in the progression;
• reproducing said recorded video signals including said recorded image fields in a reproducing operation at a second relative velocity being higher than said first velocity so that said reproduced image fields are synchronized at said display scan rate;
• repeating in the same reproducing operation the reproduction of recorded image fields at said second relative velocity, the repeated reproduction of any recorded image field in the same reproducing operation being completed before commencement of the reproduction of any recorded image field whose number in said arithmetic progression occurs more than one term after the number of the particular image field;
• and
• displaying the information contained in said reproduced image fields at said display scan rate.

In a method of playing back video information from a recording medium having a multiply coiled recording track containing a video recording produced by a method including the steps of providing signals which include said video information in a series of video signal quanta synchronized at a scan rate lower than a predetermined display scan rate, and recording said signals including said video signal quanta on said recording medium at a first relative recording medium velocity and in accordance with the arithmetic progression

• u = a + (n - l)d
• wherein:
• u denotes the numbers of the quanta which are recorded,
• a and d are positive integers above zero, and
• n is the order of any term in the progression,
• the improvement comprising in combination the steps of:
• reproducing said recorded signals including said recorded video signal quanta from said video recording in a reproducing operation effected at a second relative recording medium velocity being higher than said first velocity so that said reproduced video signal quanta are synchronized at said display scan rate;
• repeating in the same reproducing operation the reproduction of recorded video signal quanta at said second relative velocity, the repeated reproduction of any recorded video signal quantum in the same reproducing operation being completed before commencement of the reproduction of any recorded video signal quantum whose number in said arithmetic progression occurs more than one term after the number of the particular video signal quantum;
• and
• displaying at said display scan rate the video information contained in said reproduced video signal quanta.

In a method of playing back video information from a recording medium having a multiply coiled recording track containing a video recording produced by a method including the steps of providing signals which include said video information in a series of image fields synchronized at a scan rate lower than a predetermined display scan rate, and recording said signals including said image fields on said recording medium at a first relative recording medium velocity and in accordance with the arithmetic progression

• u = a + (n - l)d
• wherein:
• u denotes the numbers of the image fields which are recorded,
• a and d are positive integers above zero, and
• n is the order of any term in the progression,
• the improvement comprising in combination the steps of:
• reproducing said recorded video signals including said recorded image fields in a reproducing operation at a second relative recording medium velocity being higher than said first velocity so that said reproduced image fields are synchronized at said display scan rate;
• repeating in the same reproducing operation the reproduction of recorded image fields at said second relative velocity, the repeated reproduction of any recorded image field in the same reproducing operation being completed before commencement of the reproduction of any recorded image field whose number in said arithmetic progression occurs more than one term after the number of the particular image field;
• and
• displaying the information contained in said reproduced image fields at said display scan rate.

In apparatus for recording video information on a recording medium having a multiply coiled recording track, and subsequently displaying said video information at a display scan rate, an improvement for reducing the size of the recording medium relative to a size requisite for a recording at said display scan rate, comprising in combination:

• means for providing signals which include said video information in a series of video signal quanta synchronized at a scan rate lower than said display scan rate;
• means for recording said signals including said video signal quanta on said recording medium at a first relative recording medium velocity and in accordance with the arithmetic progression
• u = a + (n - l)d
• wherein:
• u denotes the numbers of the quanta which are recorded,
• a and d are positive integers above zero, and
• n is the order of any term in the progression;
• and
• means for reproducing said recorded signals including said recorded video signal quanta at a second relative velocity being higher than said first velocity so that said reproduced video signal quanta are synchronized at said display scan rate, said reproducing means including means for repeating in the same reproducing operation the reproduction of recorded video signal quanta at said second relative velocity, said repeating means including means for completing the repeated reproduction of any recorded video signal quantum in the same reproducing operation before commencement of the reproduction of any recorded video signal quantum whose number in said arithmetic progression occurs more than one term after the number of the particular signal quantum.

In apparatus for recording video information on a recording medium having a multiply coiled recording track and subsequently reproducing said video information at a display scan rate, an improvement for reducing the size of the recording medium relative to a size requisite for a recording at said display scan rate, comprising in combination:

• means for providing signals which include said video information in a series of image fields synchronized at a scan rate lower than said display scan rate;
• means for recording said signals including said image fields on said recording medium at a first relative recording medium velocity and in accordance with the arithmetic progression
• u = a + (n - l)d
• wherein:
• u denotes the numbers of the image fields which are recorded,
• a and d are positive integers above zero, and
• n is the order of any term in the progression;
• and
• means for reproducing said recorded signals including said image fields at a second relative velocity being higher than said first velocity so that said reproduced image fields are synchronized at said display scan rate, said reproducing means include means for repeating in the same reproducing operation the reproduction of recorded image fields at said second relative velocity, said repeating means including means for completing the repeated reproduction of any recorded image field in the same reproducing operation before commencement of the reproduction of any recorded image field whose number in said arithmetic progression occurs more than one term after the number of the particular image field.

In apparatus for playing back video information from a recording medium having a multiply coiled recording track containing a video recording procedure by a method including the steps of providing signals which include said video information in a series of video signals quanta synchronized at a scan rate lower than a predetermined display scan rate, and recording said signals including said video signal quanta on said recording medium at a first relative recording medium velocity and in accordance with the arithmetic progression

• u = a + (n - l)
• wherein:
• u denotes the numbers of the quanta which are recorded,
• a and d are positive integers above zero, and
• n is the order of any term in the progression,
• the improvement comprising in combination:
• means for reproducing said recorded signals including said recorded video signal quanta from said video recording at a second relative velocity being higher than said first velocity so that said reproduced video signal quanta are synchronized at said display scan rate, said reproducing means including means for repeating in the same reproducing operation the reproduction of recorded video signal quanta at said second relative velocity, said repeating means including means for completing the repeated reproduction of any recorded video signal quantum in the same reproducing operation before commencement of the reproduction of any recorded video signal quantum whose number in said arithmetic progression occurs more than one term after the number of the particular signal quantum.

In apparatus for playing back video information from a recording medium having a multiply coiled recording track containing a video recording produced by a method including the steps of providing signals which include said video information in a series of image fields synchronized at a scan rate lower than a predetermined display scan rate, and recording said signals including said image fields on said recording medium at a first relative recording medium velocity and in accordance with the arithmetic progression

• u = a + (n - l)d
• wherein:
• u denotes the numbers of the image fields which are recorded,
• a and d are positive integers above zero, and
• n is the order of any term in the progression,
• the improvement comprising in combination:
• means for reproducing said recorded signals including said recorded image fields from said video recording at a second relative velocity being higher than said first velocity so that said reproduced image fields are synchronized at said display scan rate, said reproducing means including means for repeating in the same reproducing operation the reproduction of recorded image fields at said second relative velocity, said repeating means including means for completing the repeated reproduction of any recorded image fields in the same reproducing operation before commencement of the reproduction of any recorded image fields whose number in said arithmetic progression occurs more than one term after the number of the particular image field.