Video signal reproducing system

• US 5,748,832 A
• Filed: 10/09/1996
• Issued: 05/05/1998
• Est. Priority Date: 05/28/1991
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Takahashi, Koji
• Primary Examiner(s): Tran, Thai
• Assistant Examiner(s): NGUYEN, HUY THANH
• Application Number:
  US08/731,120
• Time in Patent Office: 573 Days
• Field of Search: 386/46, 386/68, 386/81, 386/70, 386/82, 386/101, 386/52, 386/112, 386/122, 386/74
• US Class Current: 386/314
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 9/83 the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal

Abstract

A reproducing system for reproducing a video signal from a tape-shaped recording medium on which the video signal is recorded in each of many tracks having different azimuth angles between adjacent tracks includes a reproducing device arranged to use N rotary heads (N: an integer which is at least 2) which have different azimuth angles between adjacent heads and rotate in a closely adjacent state and to reproduce, with the heads, the video signals from N adjacent tracks on the tape-shaped recording medium as N channel video signals, and a monitoring device arranged to monitor the video signals by receiving only M channel video signals (M: an integer less than N) among the N channel video signals.

Claims

1. A video signal reproducing apparatus for reproducing video signals from a tape-shaped recording medium on which time-base-compressed video signals corresponding to video signals for a given period of time are recorded in each of many tracks having different azimuth angles between adjacent tracks, comprising:

(a) reproducing means for reproducing, by using N rotary heads (N;

an integer which is not less than

     2) having different azimuth angles between adjacent heads and being disposed in a closely adjacent state, the time-base-compressed video signals as N channel signals from N adjacent tracks formed on the tape-shaped recording medium, wherein

all of the time-base-compressed video signals recorded in the N adjacent tracks being reproduced at substantially the same time, and

the time period for reproducing the video signals from the N adjacent tracks being shorter than the given period of time;

(b) an extracting means for extracting M channel signals (M;

an integer which is less than N) from among the N channel signals;

(c) first output means for outputting said N channel signals substantially simultaneously in a time-base compressed state;

(d) second output means for outputting the N channel signals as one channel signal; and

(e) monitoring means arranged to be capable of receiving the M channel signals extracted by said extracting means and the one channel signal output from said second output means and to monitor the video signals.

2. An apparatus according to claim 1, further comprising signal processing means for receiving the N channel signals from said reproducing means at substantially the same time to perform a predetermined process to the video signals and to alter the N channel signals into the one channel signal.

3. An apparatus according to claim 2, wherein said first output means outputs the N channel signals to be received by said signal processing means, and wherein said second output means outputs the one channel signal altered by said signal processing means.

4. An apparatus according to claim 1, wherein said first output means outputs the N channel signals to a recording device, said recording device receiving the N channel signals from said first output means at substantially the same time to record, by using N rotary heads having different azimuth angles between adjacent heads and being disposed in a closely adjacent state, the N channel signals on another tape-shaped recording medium while forming N adjacent tracks on said another tape-shaped recording medium,

all of the time-base-compressed video signals being recorded onto the N adjacent tracks at substantially the same time.

5. A dubbing system for copying a tape recording medium on which time-base-compressed video signals corresponding to video signals for a given period of time are recorded in each of many tracks having different azimuth angles between adjacent tracks, comprising:

a reproducing apparatus wherein N rotary heads (N;

an integer which is not less than

     2) which have different azimuth angles between adjacent heads and are disposed in a closely adjacent state are used for reproducing said time-base-compressed video signals from N adjacent tracks formed on a first tape recording medium, all of said time-base-compressed video signals recorded in said N adjacent tracks being reproduced at substantially the same time, wherein the time period for reproducing said video signals from said N adjacent tracks is shorter than said given period of time;

a recording apparatus wherein said time-base-compressed video signals are supplied to N rotary heads which have different azimuth angles between adjacent heads and are disposed in a closely adjacent state are used for recording said time-base-compressed video signals onto N adjacent tracks on a second tape recording medium, all of said time-base-compressed video signals being recorded onto said N adjacent tracks at substantially the same time; and

monitoring device for monitoring said time-base-compressed video signals reproduced by said reproducing apparatus.

6. An apparatus according to claim 5, wherein said monitoring means is capable of monitoring all and part of the time-base-compressed video signals.

7. A video signal reproducing apparatus for copying a first tape-shaped recording medium on which time-base-compressed video signals corresponding to video signals for a given period of time are recorded in each of many tracks having different azimuth angles between adjacent tracks, comprising:

a) transporting means for transporting the first tape-shaped recording medium a distance corresponding to N tracks (N;

an integer which is not less than

     2) per said given period of time;

b) reproducing means for reproducing, by using N rotary heads (N;

an integer which is not less than

     2) having different azimuth angles between adjacent heads and being disposed in a closely adjacent state, the time-base-compressed video signals as N channel signals from N adjacent tracks formed on the first tape-shaped recording medium,

all of the time-base-compressed video signals recorded in the N adjacent tracks being reproduced at substantially the same time,

the time period for reproducing the video signals from the N adjacent tracks being shorter than the given period of time;

c) output means for outputting said time-base-compressed video signals to a recording apparatus,

said recording apparatus receiving said time-base-compressed video signals from said first output means at substantially the same time to record, by using N rotary heads having different azimuth angles between adjacent heads and being disposed in a closely adjacent state, said time-base-compressed video signals on a second tape-shaped recording medium while forming N adjacent tracks on said second tape-shaped recording medium,

all of the time-base-compressed video signals being recorded onto the N adjacent tracks at substantially the same time; and

d) monitoring means for monitoring said time-base-compressed video signals reproduced by said reproducing means.

8. An apparatus according to claim 7, wherein said reproducing apparatus has a dubbing mode in which each of said N rotary heads is reproduced with a one-track amount of information of signals during a period of time, and a normal reproducing mode in which each of said N rotary heads is produced with a one-track amount of information of signals during a period of time which is N times said given period of time.

9. An apparatus according to claim 8 wherein said reproducing apparatus is further comprised of an actuator arranged to shift positions of said N rotary heads in a direction of an axis of rotation thereof, and control means for causing said actuator to shift the positions of said N rotary heads in the direction of the axis of rotation in said dubbing mode.

10. An apparatus according to claim 9, wherein said monitoring means reduces a number of scanning lines used for monitoring a part of the time-base-compressed video signal to the number which is less than a number of scanning lines used for monitoring all of the time-base-compressed video signals.

11. A method of copying a first tape-shaped recording medium on which time-base-compressed video signals corresponding to video signals for a given period of time are recorded in each of many tracks having different azimuth angles between adjacent tracks, the method comprising the steps of:

a) transporting the first tape-shaped recording medium a distance corresponding to N tracks (N;

an integer which is not less than

     2) per said given period of time;

b) reproducing, by using N rotary heads (N;

an integer which is not less than

     2) having different azimuth angles between adjacent heads and being disposed in a closely adjacent state, the time-base-compressed video signals as N channel signals from N adjacent tracks formed on the first tape-shaped recording medium,

all of the time-base-compressed video signals recorded in the N adjacent tracks being reproduced at substantially the same time,

the time period for reproducing the video signals from the N adjacent tracks being shorter than the given period of time;

c) monitoring the reproduced time-base-compressed video signals;

d) outputting the reproduced time-base-compressed video signals to a recording apparatus; and

e) receiving the outputted time-base-compressed video signals at said recording apparatus at substantially the same time and recording the received time-base-compressed video signals on a second tape-shaped recording medium while forming N adjacent tracks on said second tape-shaped recording medium, by using N rotary heads having different azimuth angles between adjacent heads and being disposed in a closely adjacent state,

all of the time-base-compressed video signals being recorded onto the N adjacent tracks at substantially the same time.

12. A method according to claim 11, wherein said monitoring step comprises reducing a number of scanning lines used for monitoring a part of the time-base-compressed video signal to the number which is less than a number of scanning lines used for monitoring all of the time-base-compressed video signal.

13. A video signal reproducing apparatus for copying a first tape-shaped recording medium on which time-base-compressed video signals corresponding to video signals for a given period of time are recorded in each of many tracks having different azimuth angles between adjacent tracks, comprising:

a) transporting means for transporting the first tape-shaped recording medium a distance corresponding to N tracks (N;

an integer which is not less than

     2) per said given period of time;

b) reproducing means for reproducing, by using N rotary heads (N;

an integer which is not less than

     2) having different azimuth angles between adjacent heads and being disposed in a closely adjacent state, the time-base-compressed video signals as N channel signals from N adjacent tracks formed on the first tape-shaped recording medium,

all of the time-base-compressed video signals recorded in the N adjacent tracks being reproduced at substantially the same time,

the time period for reproducing the video signals from the N adjacent tracks being shorter than the given period of time;

c) output means for outputting said time-base-compressed video signals to a recording apparatus,

said recording apparatus receiving said time-base-compressed video signals from said first output means at substantially the same time to record, by using N rotary heads having different azimuth angles between adjacent heads and being disposed in a closely adjacent state, said time-base-compressed video signals on a second tape-shaped recording medium while forming N adjacent tracks on said second tape-shaped recording medium,

all of the time-base-compressed video signals being recorded onto the N adjacent tracks at substantially the same time; and

d) output means for outputting the time-base-compressed video signals reproduced by the reproducing means in a state monitorable by a monitor means.

14. An apparatus according to claim 13, wherein said reproducing apparatus has a dubbing mode in which each of said N rotary heads is reproduced with a one-track amount of information of signals during a period of time, and a normal reproducing mode in which each of said N rotary heads is produced with a one-track amount of information of signals during a period of time which is N times said given period of time.

15. An apparatus according to claim 13 wherein said reproducing apparatus is further comprised of an actuator arranged to shift positions of said N rotary heads in a direction of an axis of rotation thereof, and control means for causing said actuator to shift the positions of said N rotary heads in the direction of the axis of rotation in said dubbing mode.

16. An apparatus according to claim 13, wherein said monitoring means is capable of monitoring all and a part of the time-base-compressed video signals.

17. An apparatus according to claim 13, wherein said monitoring means reduces a number of scanning lines used for monitoring a part of the time-base-compressed video signal to the number which is less than a number of scanning lines used for monitoring all of the time-base-compressed video signals.