Multifunctional video tape recorder of helical scan type

Claim 2

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record in succession each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing side of said tape at which said tape is separated from contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1n.V, and means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means by scanning said video track n times while said tape is transported at the same speed of 1/n.V.

Claim 3

A video tape recorder according to claim 1, wherein said integer n is an odd number.

Claim 4

A video tape recorder according to claim 1, wherein the number of fields recorded on each track is an integer representing more than 2 inclusive.

Claim 5

A video tape recorder according to claim 1, wherein said first mentioned means is adapted to record said video signal at an interval of 1 field.

Claim 6

A video tape recorder according to claim 1, further including means for recording control signals on the control track of a magnetic tape when said tape is transported at a speed of 1/n.V, the interval between said control signals being of a value equivalent to the delayed interval of (n - 1) fields.

Claim 7

A video tape recorder according to claim 1, further including means for multiplying n times the frequency of each of the control signals recorded when the magnetic tape is transported at the speed of V, so that the slow-motion control signals can be givEn when said tape is transported at a speed of 1/n.V.

Claim 8

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/nrelative angle V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing side of said tape at which said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, and means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means while said tape is transported at a speed of V.

Claim 9

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/nrelative angle V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing side of said tape at which said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, and means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means while said tape is transported at a speed of V.

Claim 10

A video tape recorder according to claim 7, wherein said integer n is an odd number.

Claim 11

A helical scan video tape recorder of the rotary magnetic head system comprising; means for causing the magnetic head to record each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing side of said tape at which said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means by scanning said video track n times while said tape is transported at the same speed of 1/n.V.

Claim 12

A helical scan video tape recorder of the rotary magnetic head system comprising; means for causing the magnetic head to record each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing side of said tape at which said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means by scanning said video track n times while said tape is transported at the same speed of 1/n.V.

Claim 13

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjAcent to a trailing side of said tape at which said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, means for causing the magnetic head to reproduce the video signal recorded on the video track by said fifth mentioned means by scanning said video track in succession while said tape is transported at a speed of V, and means for causing the magnetic head to reproduce the video signal recorded on the video track by said first mentioned means by scanning said video track n times while said tape is transported at a speed of 1/n.V.

Claim 14

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjAcent to a trailing side of said tape at which said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, means for causing the magnetic head to reproduce the video signal recorded on the video track by said fifth mentioned means by scanning said video track in succession while said tape is transported at a speed of V, and means for causing the magnetic head to reproduce the video signal recorded on the video track by said first mentioned means by scanning said video track n times while said tape is transported at a speed of 1/n.V.

Claim 15

A video tape recorder according to claim 10, further including means for positioning each recorded track in alignement with scans of the magnetic head when in still reproduction.

Claim 16

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing side of said tape at which said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means by scanning said video track n times while said tape is transported at the same speed of 1/n.V, means for causing the magnetic head to reproduce the video signal recorded on the video track by said fifth mentioned means by scanning said video track in succession while said tape is transported at a speed of V, and means for causing the magnetic head to reproduce the video signal recorded on the video track by said first mentioned means by scanning said video track n times while said tape is transported at a speed of 1/n.V.

Claim 17

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record each video signal representative of one field on a video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing side of said tape at which said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means by scanning said video track n times while said tape is transported at the same speed of 1/n.V, means for causing the magnetic head to reproduce the video signal recorded on the video track by said fifth mentioned means by scanning said video track in succession while said tape is transported at a speed of V, and means for causing the magnetic head to reproduce the video signal recorded on the video track by said first mentioned means by scanning said video track n times while said tape is transported at a speed of 1/n.V.

Claim 18

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record each video signal of one frame consisting of two fields on the video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing said of said tape at whIch said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means by scanning said video track n times while said tape is transported at the same speed of 1/n.V, means for causing the magnetic head to reproduce the video signal recorded on the video track by said fifth mentioned means by scanning said video track in succession while said tape is transported at a speed of V, means for stopping the transportation of the magnetic tape to permit the magnetic head to repeatedly trace the same recorded track, and means for causing the magnetic head to trace the same recorded track, formed by said first mentioned means, n times while said tape is transported at a speed of 1/n.V.

Claim 19

A helical scan video tape recorder of the rotary head system comprising; means for causing the magnetic head to record each video signal of one frame consisting of two fields on the video track of a magnetic tape while said tape is transported at a speed of V in its lengthwise direction, means for causing the magnetic head to reproduce in succession said video signal recorded on the video track by said first mentioned means while said tape is transported at the same speed of V, means for transporting the magnetic tape at a reduced speed of 1/n.V, wherein n is an integer, means for compensating the relative angle between the scan path of the magnetic head and the lengthwise direction of the magnetic tape by upwardly shifting said tape to a position adjacent to a trailing said of said tape at whIch said tape is separated from the contact between it and the peripheral surface of a cylinder drum, whereby the magnetic head scans recorded tracks in spite of the change of the tape speed, means for causing the magnetic head to record on the video track of a magnetic tape, video signals each composed of an odd field and an even field spaced at an interval of (n - 1) fields from said odd field while said tape is transported at a speed of 1/n.V, means for causing the magnetic head to reproduce said video signal recorded on the video track by said fifth mentioned means by scanning said video track n times while said tape is transported at the same speed of 1/n.V, means for causing the magnetic head to reproduce the video signal recorded on the video track by said fifth mentioned means by scanning said video track in succession while said tape is transported at a speed of V, means for stopping the transportation of the magnetic tape to permit the magnetic head to repeatedly trace the same recorded track, and means for causing the magnetic head to trace the same recorded track, formed by said first mentioned means, n times while said tape is transported at a speed of 1/n.V.

Claim 20

A helical scan video tape recorder of the rotary head system comprising: means for transporting a magnetic tape at a first speed of V, means for recording a video signal each field in succession by means of first and second rotary heads while the rotational phase of said first and second rotary heads is controlled in response to to a reference signal which is one-half divider output of the vertical synchronizing signal carried by said video signal, means for recording said one-half divider output on a control track of the magnetic tape in the lengthwise direction of said magnetic tape when in recording, means for reproducing, when in normal playback, said video signal each field in succession by means of each of said first and second heads while the rotational phase of said first and second heads is controlled in response to the control signal thus recorded on the control track, means for reproducing the magnetic tape while said magnetic tape is transported at a second speed of 1/n.V, wherein n is an odd number not less than 3 inclusive, means for compensating the relative angle between the scan path of the first and second heads and the lengthwise direction of the magnetic tape whereby the magnetic heads scan recorded tracks in spite of the change of the tape transportation speed, means for causing the heads to record on the video track of the magnetic tape, video signals each composed of an odd field and an even field at an interval of (n- 1) fields from said odd field, in response to 1/2 n divider output of said vertical synchronizing signal while said tape is transported at the second speed and the rotational phase of said first and second heads is controlled by said first mentioned reference signal, means for recording on the control track of the magnetic tape said 1/2 n divider output corresponding to recorded tracks each representative of two fields recorded by said seventh mentioned means after said 1/2 n divider output has been delayed for a period of time corresponding to a certain number of control signals in the event that said field signals are recorded while the magnetic tape is transported at the speed of V, means for transporting the magnetic tape, which has been recorded, at the speed of V by means of said first mentioned means when in accelerated motion playback, means for controlling the rotational phase of said heads, when in accelerated motion playback, in response to a reference signal which is said control signal recorded on the control track of the magnetic tape, and means for reproducing said recorded tracks of said sampling signals by means of said first and second heads in a similAr way as in normal playback to yield accelerated motion pictures, the rate of acceleration being two times that in recording.

Claim 21

A helical scan video tape recorder of the rotary head system comprising: means for transporting a magnetic tape at a first speed of V, means for recording a video signal each field in succession by means of first and second rotary heads while the rotational phase of said first and second rotary heads is controlled in response to to a reference signal which is one-half divider output of the vertical synchronizing signal carried by said video signal, means for recording said one-half divider output on a control track of the magnetic tape in the lengthwise direction of said magnetic tape when in recording, means for reproducing, when in normal playback, said video signal each field in succession by means of each of said first and second heads while the rotational phase of said first and second heads is controlled in response to the control signal thus recorded on the control track, means for reproducing the magnetic tape while said magnetic tape is transported at a second speed of 1/n.V, wherein n is an odd number not less than 3 inclusive, means for compensating the relative angle between the scan path of the first and second heads and the lengthwise direction of the magnetic tape whereby the magnetic heads scan recorded tracks in spite of the change of the tape transportation speed, means for causing the heads to record on the video track of the magnetic tape, video signals each composed of an odd field and an even field at an interval of (n- 1) fields from said odd field, in response to 1/2 n divider output of said vertical synchronizing signal while said tape is transported at the second speed and the rotational phase of said first and second heads is controlled by said first mentioned reference signal, means for recording on the control track of the magnetic tape said 1/2 n divider output corresponding to recorded tracks each representative of two fields recorded by said seventh mentioned means after said 1/2 n divider output has been delayed for a period of time corresponding to a certain number of control signals in the event that said field signals are recorded while the magnetic tape is transported at the speed of V, means for transporting the magnetic tape, which has been recorded, at the speed of V by means of said first mentioned means when in accelerated motion playback, means for controlling the rotational phase of said heads, when in accelerated motion playback, in response to a reference signal which is said control signal recorded on the control track of the magnetic tape, and means for reproducing said recorded tracks of said sampling signals by means of said first and second heads in a similAr way as in normal playback to yield accelerated motion pictures, the rate of acceleration being two times that in recording.