JPH01196758A - Video tape reproducing device or video recording and reproducing device - Google Patents

Abstract

PURPOSE:To keep the continuity of a program by starting and stopping fast forwarding in accordance with signals of start and stop positions of reproducing cut. CONSTITUTION:The image of a scene just before an unnecessary part is stored in a one-picture memory 3 at the time of detecting the start position of this unnecessary part, and the memory 3 is repeatedly read out to output a still picture during fast forwarding for cutting of the unnecessary part. A system controller 8 outputs a first signal indicating the start position of cutting of the unnecessary part in accordance with the output of a first signal recording switch 10 on the way of reproducing, and it is written on a tape by a recording and reproducing head 6 for control. When a second signal recording switch 11 is operated after operation of the switch 10, a second signal indicating the end position of cutting is outputted. The reproduced signal from the tape is decoded by a decoder 7, and a normal synchronizing signal is given to a servo system 5, and first and second detection outputs instruct the servo system 5 to start fast forwarding, write one frame in the memory 3, and sop fast forwarding through the controller 8. Thus, the unnecessary part is cut to keep the continuity of the program.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video tape playback device or a recording playback device that automatically cuts unnecessary parts such as commercials during playback.

[Prior Art] Conventionally, when a video tape recording/playback device records a movie program or the like broadcast by a commercial broadcaster, recording is stopped only when a commercial is broadcast in order to cut out commercials that are often inserted into the main part of the program. With this kind of recording, it is possible to watch the development of a movie or the like without being interrupted by commercials.

Another method for cutting out commercials is to record the entire program without cutting out the commercials, and then cut out the commercials when dubbing the program.

[Problem to be solved by the invention] However, due to such conventional 0M cut, C
With the method of stopping recording when M is broadcast, even if the main program resumes after the commercial ends, the program often forgets to resume recording and cuts the main program, making irreversible mistakes. There was a problem in that the mental burden required to avoid such mistakes was large.

On the other hand, the method of cutting commercials when dubbing can also be used when recording an answering machine or a different program, but it requires two playback/recording devices and inevitably degrades the quality of the playback image. Additionally, there is a problem in that dubbing operations are complicated and time-consuming.

[Means for Solving the Problems] The present invention has been made in view of such conventional problems, and even if unnecessary parts such as commercials are recorded as they are,
(2) It is an object of the present invention to provide a video tape playback device or a recording/playback device that can easily play back videos with only unnecessary parts substantially cut out.

In order to achieve this object, the present invention includes a reproduction means for regenerating an image signal recorded on a running tape and outputting a video signal of a moving image, and a fast-forwarding means for fast-forwarding the tape during reproduction by the reproduction means. or a videotape recording and reproducing apparatus provided with a recording means for recording an image signal on a tape running on the videotape reproducing apparatus, a first position at which a reproduction cut is started during tape recording or reproduction; A signal recording means is provided for recording a first signal at a second position and a second signal at a second position where the playback cut following the first position is stopped, and after the first signal and second signal are recorded by the signal recording means, During playback, when the signal detecting means detects the first signal, the control means starts the fast forwarding means, and when the second signal is detected, the operation of the fast forwarding means is stopped.

Furthermore, the playback means is provided with a frame memory capable of storing at least one frame worth of image signals, and when the first signal is detected during playback, the frame memory is repeatedly read out immediately after storing one frame worth of image signals, and the video signal is read out repeatedly. Instead of using a video signal, a video signal output of a still image from a frame memory is generated from a reproducing means.

A first signal and a second signal used for fast-forward control to cut unnecessary portions of the tape are recorded on a control track for servo control adjacent to a recording track of the tape.

The first signal and the second signal have the same signal form, and control is repeated in which the first detection signal is used as the first signal to start the fast-forwarding means, and the next detection signal is used as the second signal to stop the operation of the fast-forwarding means.

Further, the first signal is recorded as an odd number address and the second signal is recorded as an even number address, and when an odd number address is detected, the fast forward means is activated, and when an even number address is detected, the operation of the fast forward means is stopped.

[Function] In the videotape playback or recording playback device of the present invention having such a configuration, the entire program is recorded as it is without considering unnecessary parts such as commercials, and when recording or When playing back after recording, a first signal is recorded at the beginning of an unnecessary part such as a CM, and a second signal is recorded at the end of the unnecessary part.

When playing back a videotape on which the first and second signals have been recorded, fast forwarding automatically starts when the first signal is detected during playback, and stops when the second signal is detected. Then, the playback operation is performed again.

Furthermore, during fast-forwarding, the playback screen immediately before fast-forwarding is stored in the frame memory and played back as a still image during fast-forwarding, so although the screen may temporarily stop, the program will not be interrupted and commercials etc. A reproduced image with unnecessary parts removed can be obtained.

Furthermore, by recording the first and second signals in unnecessary parts not only when playing back broadcast programs, but also when recording tapes from video cameras, it is possible to view edited playback images.

Of course, since the first signal and second signal recorded for cutting unnecessary parts can be erased, the cut part can be easily changed afterwards.

[Example] FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a reproducing head, which reproduces image signals recorded on the tape by running the video tape on which moving images have been recorded. The output of the playback head 1 is given to a playback section 2, and a decoded video signal including horizontal and vertical synchronization signals is played back.

The reproducing head 1 and the reproducing section 2 constitute a reproducing means.

Furthermore, in the present invention, the reproducing means consisting of the reproducing head 1 and the reproducing section 2 is provided with a one-screen memory (frame memory) 3 capable of storing at least one frame's worth of image signals. As will be explained later, the 1-screen memory 3 stores the video signal of the previous scene by detecting the beginning position of unnecessary parts such as commercials during recording or playback, and fast forwards to cut out unnecessary parts. During the period, reading of the one-screen memory 3 is repeated and used to output a still image. Therefore, the output of the playback section 2 and the output of the one-screen memory 3 are controlled by the changeover switch 4.
The video signal is inputted into the video signal from the playback unit 2 and the video signal read from the single-screen memory 3 can be selected using the changeover switch 4.

For such a playback system, a servo system 5 is provided that controls the tape running and the rotation of the playback head 1, and the servo system 5 receives a synchronization signal recorded on the control track of the video tape by a control recording/playback head 6. is given via the decoder 7.

A system controller 8 using a CPU or the like is provided as a control means for the servo system 5, and the system controller 8 includes a first signal recording switch 10 for recording a first signal and a first signal recording switch 10 for recording a second signal. A dedicated second signal recording switch 11 is connected, and in addition to this, a normal fast-forward start/stop switch and a playback start/stop switch (
An appropriate operation switch such as (not shown) is connected.

For example, in the case where the first signal and the second signal are recorded during playback, when the system controller 8 receives the switch output of the first signal recording switch 10 during playback of the videotape, the system controller 8 sends the encoder 9 a message such as a CM. A first signal indicating a first position at which to start cutting the unnecessary portion is output, and this first signal is converted by the encoder 9 into a signal format that can be input to and output from the control track of the video tape, and is then output by the control recording/playback head 6. It is inserted into the control track of the videotape. In addition, the first signal recording switch 10
When the second signal recording switch 11 is operated after the operation, the system controller 8 outputs a second signal to the encoder 9 indicating the second position at which unnecessary portions such as commercials are to be cut. This second signal from the system controller 8 is converted by an encoder into a signal format that can be output to/from the control track of the video tape, and is recorded by the control recording/reproducing head 6 on the control track of the video tape.

Furthermore, under the control of the system controller 8 by operating the first signal recording switch 10 and the second signal recording switch 11, the first signal and the second signal are recorded at the start and end positions of unnecessary parts such as commercials on the videotape. At the playback position after recording is completed, the playback signal from the control track of the videotape played back from the control recording/playback head 6 is decoded by the decoder 7, and the normal Domei signal is directly transmitted to the servo system 5. The detection outputs of the first signal and second signal recorded in advance are provided to the system controller 8. When the system controller 8 receives the detection output of the first signal indicating the start position of the cut portion from the decoder 7, it instructs the servo system 5 to start fast forwarding, for example, to start high-speed fast forwarding after stopping image playback, and simultaneously plays the Switch the selector switch 4 provided in the system to 1 from the playback section 2 side.
Switches to the screen memory 3 side, and also commands memory write control to write one frame of the video signal of the screen immediately before cutting to the one-screen memory 3, and writing of one frame of the video signal to the one-screen memory 3 is completed. Immediately, memory control is performed to repeat the memory read operation. Note that the fast-forwarding when the first signal is detected may be either high-speed fast-forwarding performed while the tape is unloaded with reproduction output stopped, or fast-forwarding for so-called picture storage performed while the tape is being loaded.

Furthermore, when the detection output of the second signal is given to the system controller 8 from the decoder 7, it instructs the servo system 5 to stop the fast forward operation, simultaneously stops the readout control of the single screen memory 3, and at the same time turns the changeover switch 4 on. The screen is switched from the one-screen memory 3 side to the playback section 2 side.

Figure 2 shows the control track 7 of the videotape for cutting unnecessary parts such as commercials in the embodiment of Figure 1.
FIG. 4 is an explanatory diagram illustrating recording states of a first signal and a second signal for a given period of time, and a reproduction mode based on detected outputs of the first signal and second signal.

FIG. 2(a) shows the track format of a video tape (for simplicity, the direction of the track is assumed to be perpendicular to the longitudinal direction of the tape). A control track 13 is provided on which a synchronization signal for controlling the system is recorded. Normally, during recording, a control signal with a 30H2 repetition synchronization with a duty ratio of 50% is recorded in the control track 13, and during playback, the rising edge of the control signal is detected to synchronize the servo system 5. ing. For this reason, since the falling part of the control signal recorded on the control track 13 is not used for controlling the servo system 5, in the present invention, the starting position for cutting unnecessary parts is set at the falling part of the control signal. A first signal indicating the first position of the cut and a second signal indicating the second position of the end of the cut are recorded.

In the case of FIG. 2(a), for example, there are three
Since there are different CM recording positions, the first signal a1. a
2. A3 is recorded, and the second signal bl is used to stop fast-forwarding at the commercial recording end position.

b2. b3 will now be recorded.

Such first signals @a1 to a3 and second signals b1 to b3
The first signal is recorded by pressing the first signal recording switch 10 immediately after the start of a commercial while watching the playback screen while recording or playing a video of a recorded performance, and the second signal is recorded immediately after the end of 0M. By pressing the recording switch 11, the second signal is recorded.

Moreover, the first signals @a1 to a3 and the second signals b1 to b3 recorded on the control track 13 in FIG. 2(a) are of the same signal form, and the During reproduction, the detection signal detected first is handled as the first signal, and the detection signal detected next is handled as the second signal.

Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to the flowchart shown in FIG.

As shown in Fig. 2(a), when a videotape with the first and second signals recorded with unnecessary parts cut out is set in the device and so-called 0M skip playback is started,
Playback of the videotape is started in step S1, and the playback signal obtained from the playback head 1 is converted into a moving image video signal (including the Domei signal) by the playback section 2. At this time, the changeover switch 4 is set on the playback section 2 side. Since it is closed, the video signal from the reproducing section 2 is reproduced and output.

When tape playback is started in step S1, in the next step S2, it is determined whether or not there is an index input based on the detection of the first signal or the second signal output from the decoder 7 to the control track 13 of the video tape. If there is no index input, the process advances to step S8 to determine whether or not reproduction is to be stopped, and if reproduction has not been stopped, the process returns to step s2 again to repeat the routine of checking the presence or absence of index input.

When an index input is obtained based on the detection of the first signal a1 recorded at the beginning position of the first commercial recording part shown in FIG. The video signal of the immediately previous scene is input and output, and the process proceeds to step s4, where a high-speed fast-forward operation is started with the playback output stopped. At the same time, in step S5, the readout and playback of the single-screen memory 3 is repeated, and at this time, the changeover switch 4 is switched to the single-screen memory 3 side by the system controller 8, so even if the playback output of the video signal stops due to fast forwarding, it will not change. The still image stored in the one-screen memory 3 is then played back.

When the playback of still images from one screen memory 3 is started in step S5, the presence or absence of the next index input is checked in the next step S4, and if there is no index input, the process advances to step S7 to determine whether or not to stop the playback. If the playback is not stopped, the process returns to S4 and repeats fast forwarding and the next step S5 in which the still image is read out from the one-screen memory 3 and played back.

When the tape is fast-forwarded in such a state where still images from the single-screen memory 3 are being played back, the end position of the first CM recording shown in FIG. If it is determined, step S1
to stop the fast-forward operation, and at the same time press the changeover switch 4.
is switched to the playback unit 2 side, and the normal playback operation of the recording track 12 immediately following the first CM recording portion is resumed.

Similarly, the first message @a2 and the second message @ of the next CMB image part
b2, 1st signal @a3 and 2nd signal b3 of the next CM recording part
0M skip playback with similar fast forwarding is repeated for .

For this reason, even if you play a videotape that includes a commercial recording, when a commercial part that does not need to be played is reached, a still image of the scene immediately before the commercial recording is displayed and the tape is fast-forwarded, and when the commercial recording part ends, video playback resumes. CM
It is possible to play a program with continuity by cutting out unnecessary parts such as.

FIG. 4 is a flowchart of 0M skip playback showing another embodiment of the present invention, and in this embodiment, FIG.
As shown in FIG. 3, the present invention is characterized in that odd addresses and even addresses are recorded as the first and second signals for the control tracks 13 adjacent to the recording tracks 1 to 12 of the video tape.

That is, an odd address is recorded as a first signal recorded at the start position of an unnecessary portion such as a CM, and an even address is recorded as a second signal recorded at the end position of the unnecessary portion.

By recording different addresses at the cut start position and cut end position in this way, skip playback for cutting unnecessary parts can be performed more reliably.

In other words, when the first signal and the second signal having the same signal form are recorded at the cut start position and the cut end position as shown in FIG. Since the stop of the operation is controlled, if an injury occurs in either the first signal or the second signal after detection, there is a risk of causing a malfunction in which the original reproduction portion is fast-forwarded. On the other hand, if different addresses are recorded at the start and end positions as shown in Figure 5(a), even if there is a discrepancy after the recording signal is detected, it will be ensured that the original playback part will not be erroneously played in fast forward. can be prevented.

Therefore, the operation of 0M skip playback when an odd number address is recorded at the start position of the unnecessary cut portion and an even number address is recorded at the cut end position as shown in Figure 5(a) will be explained with reference to the flowchart in Figure 4. It will look like this:

First, as shown in FIG. 5(a), when a videotape with an odd numbered address recorded at the beginning of a commercial recording and an even numbered address recorded at the end position is played back, the presence or absence of address recording is first checked in step S1. If not, the process advances to step S2 to start the normal playback operation, and in step S3 it is checked whether or not an address has been input. If there is no address input, it is checked in step SIO whether or not the playback has been stopped. If the playback has not been stopped, the process returns to step S2. Repeat the routine to return to playback.

When an address signal is detected from the control track of the tape during reproduction of the video signal of such a moving image, address input is determined in step S3, and the process proceeds to step S4 to check whether or not it is an odd address. If an odd address is determined in step S4, the process proceeds to step S5, where the video signal of the video immediately before the commercial is translated into the single-screen memory 3, fast-forward is activated in step S6, and further, in step S7, the single-screen memory 3 is read and played back. Performs 0M skip playback that repeats. In this 0M skip playback, the presence or absence of an address input is checked in step S8. If there is no address input, the process advances to step S9 to check whether or not the playback is to be stopped. If the playback is not stopped, the process advances to step S6 again to perform fast forwarding. At the same time, in step S7, the one-screen memory 3 is read and reproduced.

When the detection signal of the even address recorded at the end position of the CM recording is detected in the state of fast forwarding and the output of the still image video signal from the single-screen memory 3, the address input is determined in step S8, and the detection signal is detected in step S4. It is checked whether it is an odd numbered address or not, and since it is an even numbered address, the process returns to step S2 again to stop the fast forward operation, stop reading from the one screen memory 3, and return the selector switch 4 to the playback unit 2 side. to restore normal recording and playback.

Thereafter, similar processing is repeated for each address input from the control track of the tape.

On the other hand, if an address is recorded in step S1 at the start of playback, the process advances to step S4 to check whether it is an odd numbered address, and if it is an odd numbered address, fast forward is performed until an even numbered address is obtained; If there is, the playback directly proceeds to step S2.

Of course, if it is determined in either step S9 or 310 that reproduction should be stopped, the process proceeds to step S11 and the reproduction operation is stopped.

In the above embodiment, the video signal of the moving image is written to the single screen memory 3 when the first signal detection output is obtained during tape playback, but this is shown by the broken line in FIG. In this way, the video signal from the playback head 1 is directly applied to the single-screen memory 3 so that the video signal for one frame is constantly rewritten, and upon detection of the first signal, the output mode of the single-screen memory 3 is switched to the read mode. You can do it like this.

In this way, the memory can be used not only for skipping reproduction of unnecessary parts but also as a one-screen memory for appropriately reproducing still images, that is, one-screen memory for digital still reproduction.

Furthermore, in the control shown in FIG. 4, as shown in FIG. 5(a), the first signal at the cut start position is set to an odd number address, and the second signal at the cut end position is set to an even number address.
Conversely, it goes without saying that the first signal may be an even address and the second signal may be an odd address.

Furthermore, it is desirable to provide means for displaying that a fast-forwarding operation is in progress for cutting unnecessary portions.

[Effects of the Invention] As described above, according to the present invention, the entire program can be recorded as is even if there are unnecessary parts such as commercials, and the beginning position of unnecessary parts such as commercials can be adjusted during recording or during playback after recording. By recording the second signal at the end position of the first signal, when the tape recorded with the first and second signals is played back, unnecessary parts are automatically fast-forwarded, and during fast-forwarding, the cut-direct song scene is automatically Since still images are played back, the program can be played back without disrupting the continuity of the program, in which unnecessary parts such as commercials are substantially cut out.

In addition, there is no need for complicated operations such as stopping recording of unnecessary parts such as commercials during recording or cutting out commercial parts etc. when dubbing after recording the entire program, and unnecessary parts can be easily and easily cut. It is possible to play back the recorded tape.

Furthermore, not only the playback of tapes recorded with broadcast programs, but also the playback of recorded tapes recorded with a video camera, by recording the first signal at the beginning of the unnecessary part and the second signal at the end of the unnecessary part, the second signal can be played back. By reproducing the tape after recording the first signal and the second signal, the tape can be reproduced with unnecessary parts substantially cut out, and the tape recorded by the video camera can be edited more easily.

Furthermore, the first and second signals that are used to cut unnecessary parts that have been recorded can be erased, so if you want to see unnecessary parts such as commercials, you need to delete the first and second signals that have been recorded once. Furthermore, by changing the recording positions of the first signal and the second signal, the cut portion can be easily changed.

Furthermore, even if both signals are not erased, if both signals are simply prohibited from being read, or even if read, no response is made, it is possible to similarly skip playback of unnecessary portions.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the invention; Fig. 2 is an explanatory diagram of the tape recording format and playback mode; Fig. 3 is an operation flow showing an embodiment of the playback operation of the invention. FIG. 4 is an operational flow diagram showing another embodiment of the reproduction operation of the present invention; FIG. 5 is an explanatory diagram of the tape recording format and reproduction mode used in the embodiment of FIG. 4. 1: Playback head 2: Playback unit 3: 1 screen memory (frame memory) 4: Changeover switch 5: Servo system 6: Control recording/playback head 7: Decoder 8 System controller 9: Encoder 10: First signal recording switch 11 :Second signal recording switch 12:Recording track 13:Control track Patent applicant Nippon Kogaku Kogyo Co., Ltd.

Claims (8)

[Claims] (1) In a videotape reproducing device comprising a reproducing means for reproducing an image signal recorded on a running tape and outputting a video signal of a moving image, and a fast forwarding means for fast forwarding the tape, the reproducing means a signal recording means for recording a first signal at a first position of the tape and a second signal at a second position following the first position when reproducing the tape; reproducing the tape by the reproducing means; and a signal detecting means for detecting each of the first signal and the second signal; when the signal detecting means detects the first signal, the fast forwarding means is activated; and when the second signal is detected, the fast forwarding means starts the fast forwarding means. A videotape playback device comprising: a control means for stopping the operation; and a control means for stopping the operation. (2) The reproduction means includes a frame memory capable of storing at least one frame of the image signal to be reproduced, and the control means stores at least one frame of the image signal in the frame memory upon detection of the first signal by the signal detection means. storing an image signal for one frame, and immediately after storing the image signal, repeatedly reading the image signal from the frame memory, and outputting a video signal of at least one frame of a still image from the reproducing means instead of outputting a video signal of the moving image; 2. The videotape reproducing apparatus according to claim 1, wherein said videotape reproducing apparatus generates a videotape. (3) The video tape playback apparatus according to claim 2, wherein the control means constantly rewrites the frame memory with one frame worth of image signals while the playback means is playing back the tape. (4) The video tape according to claim 1, wherein the signal recording means records the first signal and the second signal on a control track for servo control adjacent to a recording track of the image signal on the tape. playback device. (5) The signal recording means records a first signal and a second signal having the same signal form at a first position and a second position on the tape, and the control means records a first signal and a second signal having the same signal form at a first position and a second position of the tape, activating the fast forwarding means using the detected signal as a first signal;
2. The videotape reproducing apparatus according to claim 1, wherein the next detection signal is used as a second signal to stop the operation of said fast-forwarding means. (6) The signal recording means records an odd address as a first signal at a first position of the tape, and records an even address as a second signal at a second position of the tape. Videotape playback device. (7) A recording means for recording an image signal on a running tape, a playback means for playing back the image signal recorded on the running tape and outputting a video signal of a moving image, and a fast-forwarding means for fast-forwarding the tape. In the video tape recording and reproducing apparatus, when the recording means records the tape, a first signal is recorded at a first position of the tape, and a second signal is recorded at a second position following the first position. signal recording means; signal detection means for detecting the first signal and second signal when the playback means plays the tape; and when the signal detection means detects the first signal, activating the fast-forwarding means; A videotape recording and reproducing apparatus comprising: control means for stopping the operation of the fast-forwarding means when the second signal is detected. (8) The reproduction means includes a frame memory capable of storing at least one frame of the image signal to be reproduced, and the control means stores at least one frame of the image signal in the frame memory upon detection of the first signal by the signal detection means. storing an image signal for one frame, and immediately after storing the image signal, repeatedly reading the image signal from the frame memory, and outputting a video signal of at least one frame of a still image from the reproducing means instead of outputting a video signal of the moving image; 8. The videotape recording and reproducing apparatus according to claim 7, wherein