JP3235593B2 - Video signal recording apparatus, video signal recording method, and dubbing system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal recording apparatus, a video signal recording method, and a dubbing system, and more particularly to recording of a video signal according to a state of an image formed by the video signal to be recorded. The present invention relates to a video signal recording device, a video signal recording method, and a dubbing system.

[0002]

2. Description of the Related Art Conventionally, as this kind of video signal recording apparatus, one disclosed in Japanese Patent Application Laid-Open No. 10-285518 is known. In this publication, a video signal recording device is connected to a video signal reproducing device to form a dubbing system. Here, the configurations of the video signal reproducing device and the video signal recording device will be described. The video signal reproducing device and the video signal recording device are independent from each other, and are independent for each video signal reproducing device and video signal recording device that control reproduction, fast forward, rewind, pause, etc. An operation key, a dubbing standby key for setting the video signal recording device to a recording standby state, and controlling the video signal reproducing device to a pause state,
A dubbing key that issues a control command to switch the video signal recording device to the playback state and then release the video signal recording device from the recording standby state and switch to the recording state, and a remote control that supports the operation mode by operating input from the operation keys The remote control device includes a command memory that stores command code data, and a control unit that reads a command code from the command memory in response to an operation input from an operation key and controls and outputs the command code to a remote control transmission unit. I have.

In the above configuration, operation keys related to editing and dubbing of the video signal recording device and the video signal reproducing device are integrated, and different remote control command codes are independently provided for the video signal recording device and the video signal reproducing device. Sent out. Specifically, when the cueing of the recording start position is completed on the video signal recording device side, the dubbing standby key is depressed, and the video signal recording device is controlled to the recording standby mode. The dubbing start is operated by a dubbing key, and the control unit reads a playback command of the video signal playback device from the command memory,
After sending a remote control signal from the remote control sending unit to the video signal reproducing device, a recording command of the video signal recording device is read. Then, a remote control signal is transmitted from the remote control transmission unit to the video signal recording device. In the operation of taking over the title, a recording standby mode command is transmitted to the video signal recording apparatus by the dubbing standby key, and then the video signal reproducing apparatus is operated to search for the title, and the dubbing start position is searched. Dubbing is resumed by operating a dubbing key or a dubbing standby key.

[0004]

In the conventional video signal recording apparatus described above, the remote controller must be operated when performing dubbing by connecting to the video signal reproducing apparatus. there were.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to determine whether an input video signal is in a moving picture state or a still picture state, and to start recording the video signal if the inputted video signal is in a moving picture state. A video signal recording device, a video signal recording method, and a dubbing system capable of performing the dubbing are provided.

[0006]

According to a first aspect of the present invention, there is provided a video signal input means for inputting a predetermined video signal, and a video signal input by the video signal input means. Meanwhile, a video signal forming one screen of an image reproduced by the obtained video signal is converted into digital data and held, and a video signal forming a screen after a predetermined period is converted into digital data. Take the difference, if this difference is greater than or equal to a predetermined value, determine whether the difference is caused by the luminance, and when it is caused by the luminance, determine the still image state,
An image state determining unit that determines a moving image state when the image signal is not caused by the luminance; and if the image reproduced by the video signal acquired by the image state determining unit is determined to be the moving image state, the video signal is recorded. And a video signal recording means. In the invention according to claim 1 configured as described above, the video signal input means inputs a predetermined video signal from a predetermined device capable of outputting a connected video signal. Then, the image state determining unit determines the video signal input from the video signal input unit.
It is determined whether the image reproduced by the video signal is in a moving image state or a still image state. Here, when the image state determination unit determines that the image reproduced by the video signal is in the moving image state, the video signal recording unit records the video signal on a predetermined recording medium such as a video tape. Here, the video signal includes a video signal, an audio signal, and a synchronization signal,
The video signal input means inputs each of these signals,
The image state determination means determines whether an image reproduced by a signal related to a video among the reproduced video signals is a moving image state or a still image state. Here, various methods can be envisioned as a method of determining whether the image formed by the video signal input by the video signal input unit is a moving image state or a still image state by the image state determination unit. For example, there is a method of digitizing an analog signal and handling it as digital data. When the video signal is handled as digital data in this manner, the process of determining the image state can be simplified. In such a case, one screen is expressed as digital data formed from pixels in a dot matrix. Therefore, the above-described difference is performed based on the pixel data of each pixel. If the number of pixels whose pixel data has a large degree of change during the period is equal to or greater than the predetermined number of pixels with respect to the total number of pixels, the moving image state is determined. . Here, the difference of the digital data composed of the pixels may be a difference for all the pixels forming one screen, or a pixel may be periodically sampled from the digital data to obtain a difference. Can be changed. On the other hand, if the difference is taken and the number of pixels having a large degree of change is equal to or greater than the predetermined value, it is determined that the moving image is in progress. However, it is inconvenient when the video signal is recorded as a moving image state. Therefore, in the present invention, even if the difference is equal to or greater than a predetermined value, it is further determined whether or not the difference is due to luminance, and if not, the moving image state is determined. This makes it possible to accurately determine the still image state and the moving image state.

[0007]

[0008]

By employing the above-described method, if the video reproduced by the video signal is in a still image state, the video signal can be prevented from being recorded. Obviously, such a method can be used even while the video signal is being recorded by the video signal recording means. As a specific mode, the invention according to claim 2 is a video signal recording device according to claim 1,
The image state determination unit determines whether the video signal input by the video signal input unit is in a moving image state or a still image state at a predetermined cycle in a situation where the video signal recording unit is recording a video signal. If it is determined that the image is in the still image state, the video signal recording means stops recording the video signal. In the invention according to claim 2 configured as described above, the image state determination unit includes:
In a situation where the video signal is being recorded by the video signal recording means, it is determined whether the video signal input by the video signal input means is in a moving image state or a still image state at a predetermined cycle. If it is determined that the image is in the still image state, the video signal recording unit stops recording the video signal.
Of course, when the recording of the video signal is stopped by the video signal recording means, the image state determination means determines whether the video signal input from the video signal input means is in a moving image state or a still image state. When returning to the moving image state, it goes without saying that the video signal recording means restarts recording of the video signal.

However, if the video formed by the video signal being recorded is stopped unilaterally, inconvenience may occur. Therefore, according to a third aspect of the present invention, in the video signal recording device according to the second aspect, the video signal recording means is configured to stop recording of the video signal.
The configuration is such that a confirmation notification is made to allow the user to select whether or not to stop. In the invention according to claim 3 configured as described above, the video signal recording means displays an indication for allowing the user to select whether to stop the recording of the video signal when stopping the recording of the video signal. By doing so, you will be notified. In such a case, if the user selects the stop of the recording of the video signal, the recording of the video signal by the video signal recording means is stopped. If the user does not select the stop, the video signal in the still image state is recorded. Will be.

Even if the image state is a still image state, it may be a part of a normal moving image state depending on the type of video. In such a case, it is preferable to determine whether the state is the moving image state or the still image state in consideration of the state of the audio signal included in the video signal. According to a fourth aspect of the present invention, in the video signal recording apparatus according to any one of the first to third aspects, when the image state determining unit determines that the image is a still image state, the image state determining unit includes the image signal in the video signal. The video signal recording means determines whether the audio signal is in a mute state while obtaining the audio signal to be obtained, and stops recording the video signal when the video signal is determined to be in a mute state. . In the invention according to claim 4 configured as described above, when the image state determination unit determines that the image is in the still image state, the image signal determination unit is in a mute state while acquiring an audio signal included in the video signal. If it is determined, the video signal recording means stops recording the video signal. That is, when the image state is the still image state and the sound is the mute state, it is determined that the image is the still image state, and the recording of the video signal is stopped.

As described above, when the video signal input from the connected video signal reproducing apparatus is in a moving image state, the method of recording the video signal is not necessarily limited to a substantial apparatus. It can be easily understood that it also functions as the method. For this reason, the invention according to claim 5 is a video signal recording method for executing recording of a video signal input from a connected video signal reproducing device when the video signal is in a moving image state. And a video signal input step of inputting the video signal and converting the video signal forming one screen of an image reproduced by the obtained video signal into digital data while obtaining the video signal input in the video signal input step. The video signal forming the screen after a predetermined period is converted into digital data, and a difference between the two is obtained. If the difference is greater than or equal to a predetermined value, it is determined whether or not the difference is caused by luminance. An image state determination step of determining a still image state when the image is caused by the luminance, and determining a moving image state when the image is not caused by the luminance; If it is determined that the image reproduced based on the video signal acquired in another step is in a moving image state, the video signal recording step of recording the video signal is provided.
In other words, there is no difference in that the present invention is not necessarily limited to a substantial device and is also effective as a method.

Further, when a video signal input from a connected video signal reproducing apparatus is in a moving image state,
The method of recording the video signal need not necessarily be limited to a single video signal recording device, but it can be easily understood that the video signal recording device also functions as a dubbing system that is integrated with a device that reproduces the video signal. it can. For this reason, the invention according to claim 6 provides a video signal reproducing apparatus for outputting a video signal in which an image to be reproduced is in a moving image state or a still image state, a video signal input from the video signal reproducing apparatus, and the video signal A video signal recording device for recording, wherein the video signal reproducing device includes video signal output means for outputting a video signal, and the video signal recording device comprises a video signal output device for outputting a video signal. A video signal input unit for inputting a signal, and a video signal forming one screen of an image reproduced by the obtained video signal while obtaining the video signal input by the video signal input unit, and converting the video signal into digital data. A video signal forming a screen after a predetermined period is converted into digital data, and a difference between the two is calculated. If the difference is above, it is determined whether or not the difference is caused by the luminance. When the difference is caused by the luminance, the image is determined to be in the still image state, and when the difference is not caused by the luminance, the image is determined to be the moving image state. When the image reproduced from the video signal acquired by the image state discriminating unit is judged to be a moving image state, the video signal recording unit records the video signal. That is, it is not limited to a single video signal recording device,
There is no difference in that the present invention is also effective as a dubbing system in which the video signal recording device and the video signal reproducing device are connected.

When the video signal recording device side of the dubbing system determines whether the input video signal is a moving image state or a still image state, the video signal is converted into digital data as described above, The determination is made by taking the difference in the period. However, when the video signal is set to the still image state on the video signal reproducing apparatus side, it is preferable that the video reproducing apparatus side can notify that the video signal is in the still image state. Therefore, according to a seventh aspect of the present invention, in the dubbing system according to the sixth aspect,
When outputting the video signal, the video signal output unit superimposes a control signal indicating a moving image or a still image on the video signal, and the image state determination unit monitors the signal, and if the instruction indicates a moving image, , The video signal is determined to be in a moving image state. In the invention according to claim 6 configured as described above, the video signal output means of the video signal reproducing device superimposes a control signal indicating a moving image or a still image on the video signal when outputting the video signal. Then, the image state determining means of the video signal recording device monitors this signal, and if the instruction is a moving image, determines the video signal as a moving image state.

[0015]

As described above, according to the present invention, it is possible to accurately determine whether an image reproduced by an input video signal is a moving image state or a still image state. A video signal recording device capable of starting recording of a video signal can be provided. Furthermore, according to the second aspect of the present invention, if a still image state is reached during recording of a video signal, recording of the video signal can be stopped. Further, according to the third aspect of the present invention, when stopping the recording of the video signal, the user can select whether or not to stop the recording. Claim 4
According to the invention, since the state of the audio signal included in the video signal is also an element for determining the state of the moving image, it is possible to more accurately determine the state of the image. According to the fifth aspect of the present invention, it is accurately determined whether an image reproduced by an input video signal is a moving image state or a still image state. A video signal recording method that can be started can be provided. Further, according to the invention according to claim 6, it is determined whether an image reproduced by the input video signal is a moving image state or a still image state, and if the image is a moving image state, recording of the video signal is started. Can be provided. Furthermore, according to the invention according to claim 7, it is possible to determine whether the state is a moving image state or a still image state by a simple method.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a claim correspondence diagram of a dubbing system constructed by connecting a video signal recording device and a video signal reproducing device according to an embodiment of the present invention. In FIG. 1, the present dubbing system includes a video signal reproducing device A1 and a video signal recording device A2. The video signal reproducing device A1 includes a video signal output unit C1, and the video signal recording device A2 includes a video signal input unit C2, an image state determining unit C3, and a video signal recording unit C4. I have. The video signal reproducing means C1 performs the video signal reproducing device A1 on the video signal read from a predetermined recording medium on which the video signal is recorded in the video signal reproducing device A1.
2 performs predetermined signal processing so as to be identifiable, and outputs the signal to the video signal reproducing apparatus A2.

On the video signal reproducing device A2 side, the video signal is acquired by the video signal input means C2 and sent to the image state discriminating means C3. The image state discriminating means C3 holds, at a predetermined cycle, data relating to an image in the video signal reproduced by the video signal, and if the same data before and after the cycle does not change, the image reproduced by the video signal is a still image. It is determined that it is in the state. On the other hand, if there is a change in the video signal before and after this cycle, the reproduced image is determined to be a moving image state. When it is determined that the moving image is in the moving image state, the video signal recording unit C4 acquires the video signal input by the video signal input unit C2 and records the video signal on a predetermined recording medium.

Next, a schematic configuration of a video deck to which the video signal reproducing device A1 and the video signal recording device A2 are applied is shown in a block diagram of FIG. In FIG. 1, a tuner 10 is instructed by a microcomputer 20 for a tuning frequency, receives a television broadcast wave via an antenna 11, and outputs an intermediate frequency signal. This intermediate frequency signal is supplied to a one-chip IC (1 chip IC) 40 that controls the entire video deck. Further, the tuner 10 is directly connected to the microcomputer 20, and the video unit 30 and the one-chip IC 40 are connected to the microcomputer 20 via the IIC bus 50. Is running the control. The video unit 30 drives a servomotor and transmits and receives a head signal while receiving a detection signal from a sensor in the video mechanism unit 31, and performs recording and reproduction on a video tape, tape feeding, and the like. The video unit 30 is provided with a composite video output terminal 32 and an audio output terminal 33, and outputs a reproduction signal from the video output terminal 32 and the audio output terminal 33 during video reproduction.

In this embodiment, the video unit 3
0 is a video signal recorded on a video tape and includes a synchronizing signal of the composite video signal. A video unit 30 that outputs the video signal outputs a video signal output from the video signal reproducing apparatus A1. It constitutes means C1. On the other hand, from the viewpoint of recording a video signal on the mounted video tape, the video signal recording unit C4 of the video signal recording device A2 is configured. However, the video signal output means C1 only needs to be capable of reproducing video data, audio data and a synchronization signal included in the video signal recorded on the video tape, and is not necessarily a composite video signal. Alternatively, a configuration may be used in which the RGB primary color signal and the synchronization signal are separated and output.

The video output terminal 32 and the audio output terminal 33 are connected to the video input terminal 41 and the audio input terminal 42 of the one-chip IC 40. The one-chip IC 40 performs reception processing of television broadcasting based on the intermediate frequency signal input from the tuner 10, and also performs detection and demodulation of an audio signal at the same time. In the present embodiment, it is assumed that the video signal is composed of a video signal relating to video reproduction and an audio signal relating to audio reproduction.

Here, the one-chip IC 40 is capable of switching between a television signal and a video signal as an input source. When a television signal is used as an input source, the one-chip IC 40 detects and demodulates a video intermediate frequency signal and outputs an audio intermediate frequency signal. Although a video signal and an audio signal are detected and demodulated based on the signal to generate a video signal and an audio signal, the subsequent steps are the same as the case where the video signal is used as an input source. In addition, one-chip IC 40
Can be switched also for a video signal input from outside, and when a video signal is input from outside, recording is performed based on this video signal.
Such recording is performed in the dubbing mode.

Next, FIG. 3 shows a schematic configuration of a video unit 30 for recording and reproducing a video signal. In the figure, for an audio signal, a reproduction signal from an audio head 31a is converted to an equalizer reproduction amplification circuit 34.
The reproduction process is performed at a. On the other hand, as for the video signal, the reproduced signal from the video head 31b is transmitted to the head amplifier 34b.
After that, the video signal is supplied to a video signal reproduction system 34c and a color reproduction system 34d, and further mixed by a YC mixing circuit 34e to output a composite video signal.
This video processing system demodulates a so-called luminance signal. The frequency characteristic of the demodulation circuit is variable, and the frequency characteristic can be adjusted by an external control signal.

In the embodiment described above, the video output terminal 32 and the audio output terminal 3 of the video unit 30 are used.
3 is input to the one-chip IC 40 and connected to the external output terminal 60 to enable direct external output. Further, an external input terminal 61 is provided on a wiring for inputting the video output terminal 32 and the audio output terminal 33 to the one-chip IC 40. When a video signal and an audio signal are input from the external input terminal 61, the external input terminal 61 The side that performs the video signal recording is the video signal recording apparatus A1, and the side that outputs the video signal and the audio signal to the external input terminal 62 is the video signal reproducing apparatus A1, which functions as a dubbing system. FIG. 4 shows a connection state in such a case. That is, a predetermined cable 62 is connected between the external output terminal 60 of the video deck applied to the video signal reproducing device A1 and the external input terminal 61 of the video deck applied to the video signal recording device A2.
And input / output video and audio signals.

In the present embodiment, a video deck is applied to the video signal reproducing apparatus A1, a video signal and an audio signal recorded on a video tape mounted on the video deck are reproduced, and the video signal is reproduced by the video signal recording apparatus A2. It uses a dubbing system that outputs to the applied VCR and records the video and audio signals played back on the VCR. Of course, such a dubbing system is limited to the connection between VCRs It is not something to be done. That is, the video signal reproducing device A1 only needs to be able to reproduce a video signal and an audio signal recorded on a predetermined recording medium and to output the video signal and the audio signal to the video signal recording device A2. The device A1 may employ a DVD (digital video) or an 8 mm movie, and can be changed as appropriate. Also, the video signal recording device A2 is only required to be able to record a video signal and an audio signal input to a predetermined recording medium, and similarly can be appropriately changed.

As described above, the reproduction side video deck applied to the video signal reproduction apparatus A1 and the video signal recording apparatus A2
A dubbing system is constructed by the recording-side VCR applied to the recording-side VCR, and a dubbing operation for recording the video signal and the audio signal output from the reproduction-side VCR on the recording-side VCR is performed. In such a case, the user performs a dubbing operation by selecting a dubbing mode on the recording-side VCR. In such a case, as an operation example of the dubbing operation, the user performs the recording operation on the recording VCR at the same time as the reproduction operation on the reproducing VCR, and starts dubbing, that is, manually starts dubbing. Various methods are known, such as a method that takes timing and a method that the recording-side VCR automatically starts dubbing in synchronization with a predetermined control signal from the reproduction-side VCR. Here, in the present embodiment, when the dubbing mode is selected on the recording-side VCR,
The one that starts dubbing when the image of the video by the video signal reproduced from the reproduction side video deck becomes a moving image state is adopted.

FIG. 6 is a flow chart showing the contents of the video signal recording processing executed by the recording side video deck of the dubbing system according to this embodiment. In FIG. 10, when the dubbing mode is set on the recording side VCR (step S100), the microcomputer 20 of the recording side VCR inputs this setting and puts the recording operation of the video signal and the audio signal into a standby state. (Step S110). Then, a video signal and an audio signal are input from the playback side video deck via the external input terminal 61 (step S115). Next, a video signal for one screen reproduced by the video signal is converted into digital data, and while acquiring DATA-A, a RAM (not shown)
It is stored in an EEPROM or the like (step S120).

After a predetermined period has elapsed (step S1).
25), a video signal for one screen reproduced by the video signal is converted into digital data, and DATA-B is obtained (step S135). Next, based on the digital data DATA-A and DATA-B, which will be described later, a moving image determination process for determining a moving image state when there is an image change during a predetermined period or a still image state when there is no image change. Is performed (step S140). If it is determined in the moving image determination process that the change in the image during the predetermined period is the moving image state (step S145), the standby state set in step S110 is released (step S150), and the image sensor is mounted on the video mechanism unit. The recording of the video signal and the audio signal on the video tape thus started is started (step S155).

FIG. 7 is a flow chart showing the processing contents of the video signal recording stop processing executed in the recording side video deck of the dubbing system according to the present embodiment. The video signal recording stop process is a process of stopping the recording of the video signal and the audio signal when the image reproduced by the video signal becomes a still image state while the video signal and the audio signal are being recorded on the recording side VCR. In the figure, a video signal input from a playback-side VCR is converted into digital data to generate DATA-A ', which is stored in a RAM, an EEPROM (not shown) or the like (step S200). Then, when a predetermined period elapses (step S205), the video signal is converted into digital data again to generate DATA-B ', and a moving image determination process described later is performed (step S215). When the change of the image during the predetermined period is determined to be the moving image state in the moving image determination process (step S220), the recording of the video signal and the audio signal is continued (step S225). On the other hand, if it is determined that the image is in the still image state, the recording of the video signal and the audio signal is stopped (step S230).

Of course, after stopping the recording operation of the video signal and the audio signal in step S230,
Returning to 200, the moving picture state of the video signal is monitored, and when returning to the moving picture state, it goes without saying that the stop of the recording operation is released and the recording of the video signal and the audio signal is restarted again. In the present embodiment, the configuration is adopted in which the recording operation is stopped in step S230 when the still image state is determined. However, the recording operation is automatically performed when the still image state is determined in this manner. However, the present invention is not limited to the configuration in which the recording operation is stopped. An OSD (On-Screen Display) circuit (not shown) displays an operation screen as shown in FIG. If the user selects stop, step S230
A configuration may be adopted in which the recording operation is stopped.

FIG. 9 is a flowchart showing the operation in step S140 of FIG.
The video signal recording process shown in FIG.
15 is a flowchart illustrating the processing content of a moving image determination process performed in the video signal recording stop process illustrated in FIG. In the figure, first, at steps 120 and S2
The digital data DATA-A and A 'generated in 00 are read and acquired from the stored RAM, EEPROM or the like (step S300). The digital data indicates image data of one screen, and raster data in which image data of one screen is stored in predetermined pixels. Next, steps S135 and S210
The digital data DATA-B and B 'generated in step (1) are acquired (step S305), the pixel data of each corresponding pixel is compared (step S310), and the degree of change is calculated. Then, it is determined whether or not the number of pixels whose degree of change is equal to or greater than a predetermined value is equal to or greater than a predetermined threshold (step S315). If the number of pixels having the predetermined degree of change is smaller than the threshold value, it is determined that the image reproduced by the input video signal is in a still image state (step S3).
20) On the other hand, if the number of pixels having the predetermined degree of change is equal to or greater than the threshold, the image reproduced by the input video signal is determined to be in a moving image state (step S325).

FIG. 10 is a flowchart showing another processing content of the above-described moving image determination processing. In the figure, first, the digital data DATA-A, A 'generated in steps S120 and S200 are read and acquired from the stored RAM, EEPROM or the like (step S400). The digital data indicates image data of one screen, and raster data in which image data of one screen is stored in predetermined pixels. Next, the digital data DATA-B, B ′ generated in steps S135 and S210 are obtained (step S405), and pixel data is compared for each corresponding pixel (step S410), and the degree of change is calculated. Then, it is determined whether or not the number of pixels whose degree of change is equal to or greater than a predetermined value is equal to or greater than a predetermined threshold (step S415). If the number of pixels having the predetermined degree of change is smaller than the threshold value, an audio signal is obtained to determine whether the image reproduced by the input video signal is in a still image state, further based on audio. (Step S42
0). If the audio signal is in a mute state, that is, a silent state (step S425), the image reproduced by the input video signal is determined to be a still image state (step S425).
430) On the other hand, when the number of pixels having the predetermined degree of change is greater than or equal to the threshold value and when the number of pixels having the predetermined degree of change is smaller than the threshold value but the audio signal is not muted, the input video signal Is determined to be a moving image state (step S325). Therefore,
The video signal is converted into digital data at predetermined intervals, and a moving image determination process is performed to determine whether an image reproduced by the video signal is in a moving image state or a still image state based on the degree of change in the digital data before and after the period. The image state determining means C3 is configured.

As described above, in the dubbing mode, when the image reproduced by the video signal on the reproduction side and input to the video signal on the recording side is reproduced as a moving image, the recording of the video signal and the audio signal is automatically performed. In order to start the dubbing operation, the user only has to set the recording side VCR to the dubbing mode and then operate to output a video signal indicating a moving image from the reproduction side VCR, so that the dubbing operation can be easily performed. Become. In addition, even if it is determined that the image is still, there may be an audio signal. Therefore, the state of the image is determined by combining the state of the image reproduced by the video signal and the state of the audio signal. It is possible to determine the moving image state of the image.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to a claim of a dubbing system constituted by a video signal reproducing device and a video signal recording device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a video deck applied to a video signal reproducing device and a video signal recording device in the embodiment.

FIG. 3 is a block diagram showing a configuration of a video unit included in the video deck.

FIG. 4 is a diagram showing a connection form between a recording side video deck and a reproducing side video deck.

FIG. 5 is a diagram showing another example in the case of constructing a dubbing system.

FIG. 6 is a flowchart showing the details of a video signal recording process performed by a recording-side VCR.

FIG. 7 is a flowchart showing a process of a video signal recording stop process executed by the recording side video deck.

FIG. 8 is a diagram showing a notification screen for notifying a user of whether or not to stop recording of a video signal when the recording is stopped.

FIG. 9 is a flowchart illustrating the processing content of a moving image determination process in a video signal recording process and a video signal recording stop process.

FIG. 10 is a flowchart showing processing contents of another moving image determination processing.

[Explanation of symbols]

 Video signal reproducing device A1 Video signal recording device A2 Video signal output device C1 Video signal input device C2 Image state determining device C3 Video signal recording device C4

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04N 5/76-5/956 H04N 9/79-9/898

Claims (7)

(57) [Claims] 1. A video signal input means for inputting a predetermined video signal, and a video signal input by the video signal input means is obtained, and a screen of an image reproduced by the obtained video signal is formed. The video signal is converted into digital data and held, and the video signal forming the screen after a predetermined period is converted into digital data, and a difference between the two is obtained. If the difference is equal to or greater than a predetermined value, the difference is determined by the luminance. Image state determining means for determining whether or not the image state is present, and determining the still image state when the image is caused by luminance, and determining the moving image state when the image is not caused by the luminance; A video signal recording means for recording an image reproduced by the acquired video signal in a moving image state when the video signal is determined to be a moving image state. No. recording device. 2. The video signal recording device according to claim 1, wherein said image state determination means is configured to input said video signal input means when said video signal recording means is recording a video signal. A video signal recording unit that determines whether a video signal to be recorded is in a moving image state or a still image state in a predetermined cycle, and when the video signal is determined to be in a still image state, the video signal recording unit stops recording the video signal. . 3. The video signal recording device according to claim 2, wherein the video signal recording means issues a confirmation notice for allowing the user to select whether or not to stop when recording the video signal. Video signal recording device. 4. The video signal recording apparatus according to claim 1, wherein said image state determining means converts an audio signal included in the video signal when determining that the image is in a still image state. While acquiring, determine whether the audio signal is in a mute state,
The video signal recording device, wherein when the video signal recording means is determined to be in a mute state, recording of the video signal is stopped. 5. A video signal recording method for executing recording of a video signal inputted from a connected video signal reproducing apparatus when the video signal is in a moving image state, wherein a video signal inputting a predetermined video signal is performed. And a step of acquiring a video signal input in the video signal input step, converting a video signal forming one screen of an image reproduced by the acquired video signal into digital data, holding the video signal, The video signal forming the subsequent screen is converted into digital data, the difference between the two is taken, and if the difference is greater than or equal to a predetermined value, it is determined whether or not the difference is caused by the luminance. Image state determining step of determining a still image state when the image is displayed, and determining a moving image state when the image is not caused by luminance, A video signal recording step of recording the video signal when an image reproduced based on the video signal is determined to be in a moving image state. 6. A video signal reproducing apparatus for outputting a video signal in which an image to be reproduced is in a moving image state or a still image state, and a video signal recording apparatus for inputting a video signal from the video signal reproducing apparatus and recording the video signal Wherein the video signal reproducing device includes a video signal output unit that outputs a video signal, and the video signal recording device includes a video signal that inputs a video signal output by the video signal output unit. Input means, while acquiring the video signal input by the video signal input means, converts a video signal forming one screen of an image reproduced by the obtained video signal into digital data, and holds the digital signal; The video signal forming the subsequent screen is converted into digital data, and the difference between the two is calculated. If the difference is equal to or greater than a predetermined value, the same is performed. Image state determining means for determining whether or not the minute is caused by the luminance, and determining the still image state when the minute is caused by the luminance, and determining the moving image state when the minute is not caused by the luminance; A dubbing system comprising: video signal recording means for recording an image reproduced by a video signal acquired by an image state determination means as a moving image state, and recording the video signal. 7. The dubbing system according to claim 6, wherein the video signal output means superimposes a control signal indicating a moving image or a still image on the video signal when outputting the video signal, and A dubbing system characterized in that the judging means monitors this signal and, if the instruction is a moving image, judges that the video signal is in a moving image state.