KR19980027712A - Method for displaying PIP screen of camcorder and device therefor - Google Patents

Abstract

The video signal supplied from the camera is recorded so that the editing operation using the camcorder can be easily performed by displaying the picture taken by the camera and the picture reproduced from the video signal stored in the recording medium as a PIP screen on one viewfinder. A PIP screen display of a camcorder having a function of displaying the video signal on a viewfinder simultaneously with recording on a medium, and displaying a video signal reproduced on the viewfinder by reproducing the video signal recorded on the recording medium. A method comprising: receiving an image signal supplied from the camera and an image signal recorded on the recording medium, and reducing any one of the respective image signals to a predetermined size with respect to the entire screen, and reducing the reduced image The signal is synchronized with the other one of the respective video signals A lock said reduced video signal and the other of the image signal synthesized by the PIP screen display method of the camcorder to output to the viewfinder presented.

In addition, a camera for photographing a subject, a recording circuit for recording an image signal applied from the camera on a recording medium, a reproducing circuit for reproducing the video signal recorded on the recording medium, and an image photographed by the camera A camcorder having a viewfinder for displaying a signal and a video signal reproduced by the playback circuit, respectively: A camcorder comprising: receiving a video signal photographed by the camera and a video signal reproduced by the playback circuit, respectively; Reduce the video signal of any one of the signals, set the reduced video signal as the child screen, and set the other video signal as the mother screen to synchronize the child screen with the mother screen, and synthesize the synthesized PIP screen. A PIP screen display apparatus of a camcorder having a PIP circuit output to the viewfinder is provided.

Description

Method for displaying PIP screen of camcorder and device therefor

The present invention relates to a method of displaying a picture-in-picture (PIP) screen of a camcorder and a device thereof. More particularly, the present invention relates to a video signal output from a camera and a video signal output from a playback circuit. The present invention relates to a method for displaying a PIP screen of a camcorder and a device for displaying a synthesized PIP screen in a view finder by signal-processing the parent screen and the child screen, and synthesizing the signal-processed mother screen and the child screen.

In general, a camcorder is called a video camera, and refers to an apparatus for converting and recording and reproducing images of various subjects captured by the camera into electrical video signals by providing a normal camera and video signal recording and reproducing circuits simultaneously. These camcorders have the advantage of being able to capture and record their own unique images according to the intention of the photographer.

Accordingly, in recent years, the user's demand for the performance and function of the camcorder has been gradually increased, and in addition, small size, light weight, low power consumption, high performance and multifunctionalization have been sought.

As shown in FIG. 1, the internal structure of a conventional camcorder includes a camera 1 for capturing a subject and converting the photographed image into an electric video signal, and a video signal supplied from the camera 1 such as a magnetic tape. A recording circuit 3 for recording on the recording medium 2, a reproduction circuit 4 for reproducing the video signal recorded on the recording medium 2, and an image signal and reproduction circuit 4 applied from the camera 1; Video signal applied from the viewfinder 5 mounted in the camcorder to display any one of the video signals reproduced by the < RTI ID = 0.0 > camera, < / RTI > Is composed of a switching element 6 for switching what is displayed in the viewfinder 5.

That is, the image of the subject to be photographed by the user is converted into an electric video signal by the camera 1 as the user selects the recording function, and then supplied to the recording circuit 3. The recording circuit 3 records the video signal applied from the camera 1 on the recording medium 2. Since this process is the same operation as a conventional video cassette recorder, detailed description thereof will be omitted.

On the other hand, the video signal recorded on the recording medium 2 is applied to the reproduction circuit 4 as the user selects the reproduction function to undergo the reproduction process. The reproduced video signal is output to the viewfinder 5 or other display device (TV monitor, computer monitor, etc.) and output as an image that can be recognized by the user.

Here, the switching element 6 switches so that any one of the video signal applied from the camera 1 and the video signal reproduced through the reproduction circuit 4 is selectively output to the viewfinder 5.

In such a conventional camcorder, an image capturing mode for recording a subject by using a camera 1 and converting the photographed image into an image signal and recording the image onto a recording medium (usually, 'magnetic tape' is used), and recording A playback mode for reproducing the video signal recorded on the medium 2 and outputting it to a display apparatus such as a television, and recording on the recording medium 2 to search for a specific portion of the video signal recorded on the recording medium 2; It is essentially provided with a function such as a search mode for displaying a video signal on the viewfinder.

Here, the imaging mode refers to a state in which the camera 1 for photographing a subject and the recording circuit 3 for recording an image signal applied from the camera 1 are operated. In addition, the search mode refers to a state in which the playback circuit 4 is operated to check the contents recorded on the recording medium 2. When the search mode is selected, the video signal output from the camera 1 is displayed in the viewfinder 5. The video signal recorded on the recording medium 2 is not displayed on the viewfinder 5. Such a search mode can provide convenience for editing operations such as insertion while preserving already recorded contents.

On the other hand, the PIP function is a function to insert the child screen on the mother screen to display at the same time on one display device, unlike the other functions have a feature that the mother screen and the child screen are each a moving picture. Such a PIP function can create various functions such as still picture of a child screen, multiple PIP functions of displaying a plurality of child screens, rotation and position movement of the child screen, and replacement of the mother screen and the child screen.

However, since the conventional camcorder is not equipped with such a PIP function, the viewfinder 5 can selectively display only an image signal provided from either the camera 1 or the recording medium 2. Accordingly, the user needs a separate editing equipment to perform the editing work, there is a problem that requires the user additional costs.

Further, when the source of the video signal displayed on the viewfinder 5 is switched from the camera 1 to the recording medium 2 or from the recording medium 2 to the camera 1, the display state is switched. Since the process takes a certain time, there was an inconvenience that the user has to wait for a predetermined time during this conversion process.

Accordingly, an object of the present invention is to solve the above-described problems, and an object of the present invention is to display a PIP screen of a camcorder in which an image signal applied from a camera and an image signal applied from a recording medium are displayed as a PIP screen on a viewfinder. In providing.

In addition, another object of the present invention is to provide a PIP screen display method of a camcorder which can easily perform an editing function by simultaneously displaying an image signal applied from a camera and an image signal applied from a recording medium.

Another object of the present invention is to provide a PIP screen display apparatus of a camcorder for performing the above-described objects.

1 is a schematic block diagram showing the internal structure of a conventional camcorder;

2 is a schematic block diagram of a PIP screen display apparatus of a camcorder according to the present invention;

FIG. 3 is a detailed block diagram of the PIP circuit shown in FIG. 2.

* Explanation of symbols used in the main part of the drawing

1: camera 2: magnetic tape

3: recording circuit 4: reproduction circuit

5: viewfinder 7: PIP circuit

8: luminance signal processing unit 9: chroma and synchronization signal processing unit

10: synthesizer 11: analog-to-digital converter

12: memory 13: controller

14: synchronous separator 15: switching element

A feature of the present invention for achieving the above objects is a function of recording a video signal supplied from a camera on a recording medium and displaying the video signal on a viewfinder, and a video signal recorded on the recording medium. A PIP screen display method of a camcorder having a function of displaying a reproduced and reproduced video signal on the viewfinder, the method comprising: receiving a video signal supplied from the camera and a video signal recorded on the recording medium, respectively; One of the video signals is reduced to a predetermined size with respect to the entire screen, and the reduced video signal and the other video are synchronized so that the reduced video signal is synchronized with the other video signal of the respective video signals. Display method of the PIP screen of the camcorder which synthesizes the signal and outputs it to the viewfinder There.

On the other hand, another feature of the present invention is a camera for photographing a subject, a recording circuit for recording an image signal applied from the camera on a recording medium, a reproducing circuit for reproducing the video signal recorded on the recording medium; A camcorder having a viewfinder for displaying a video signal photographed by the camera and a video signal reproduced by the reproduction circuit, respectively: A video signal photographed by the camera and a video signal reproduced by the reproduction circuit Each input signal is reduced to reduce one of the video signals, set the reduced video signal as the own screen, and set the other video signal as the mother screen to synchronize the child screen to the mother screen. And a PIP screen display apparatus of a camcorder having a PIP circuit for outputting a synthesized PIP screen to the viewfinder.

According to another aspect of the present invention, the PIP circuit comprises: a luminance signal processor for detecting and signal-processing a luminance signal included in any one of a video signal input from the camera and a video signal reproduced from the recording medium; A chroma and synchronous signal processor configured to detect and process a chroma signal included in the one video signal and to detect a synchronous signal included in the one video signal; A synthesizer for synthesizing the luminance signal signal processed by the luminance signal processor and the chroma signal signal processed by the chroma and synchronization signal processor; An analog / digital converter for converting an analog video signal synthesized by the synthesizer into a digital video signal; A memory for storing a video signal digitized by the analog / digital converter; A sync separator for detecting a sync signal from another video signal of each video signal; The image signal digitalized by the analog / digital converter is reduced to a predetermined size with respect to the entire screen and stored in the memory, and the other image signal is obtained by using the synchronization signal detected from the synchronization separator. A controller which detects the reduced image signal stored in the memory to be synchronized with the controller, and outputs a mother screen / sub picture switching pulse using a synchronization signal applied from the synchronization separator; And the other image signal and the reduced image signal on the viewfinder according to a mother screen / sub picture switching pulse applied from the controller so that the other image signal and the reduced image signal output from the controller are synthesized. It is preferable to comprise a switching element for switching the output.

Hereinafter, a method of displaying a PIP screen of a camcorder and a preferred embodiment of the apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic block diagram of a PIP screen display apparatus of a camcorder according to the present invention. In Fig. 2, the same reference numerals as in Fig. 1 denote the same parts.

Referring to Fig. 2, a camera 1 for capturing a subject and converting the photographed image into an electric video signal, and a recording for recording the video signal supplied from the camera 1 onto a recording medium 2 such as magnetic tape or the like. A reproducing circuit 4 for reproducing the video signal recorded on the recording medium 2, a viewfinder 5 mounted in the camcorder to display the video signal reproduced by the reproducing circuit 4; The video signal applied from the camera 1 and the video signal from the playback circuit 4 are simultaneously applied, and each video signal is separated from the mother screen and the mother screen, and then synthesized. And a PIP circuit 7 output to 5).

In addition, as shown in FIG. 3, the PIP circuit 7 processes the luminance signal included in one of the video signal output from the camera 1 and the video signal output from the playback circuit 4. The luminance signal processing section 8, the chroma and synchronization signal processing section 9 for signal processing the chroma signal and the synchronization signal included in any one of the above-described video signals, and the luminance signal signal processing in the luminance signal processing section 8 (Y) and a synthesizer 10 for synthesizing the chroma signals RY and BY signal processed by the chroma and synchronization signal processing section 9, and the analog luminance signal Y and the chroma signal synthesized by the synthesizer 10. An analog / digital converter 11 for converting (RY, BY) into a digital form, a synchronous signal output from the chroma and synchronous signal processing section 9, and a digital luminance signal Y output from the analog / digital converter 11; And chroma signals RY and BY at the same time The digital luminance signal Y and the chroma signals RY and BY are reduced in the state of being synchronized with the synchronization signal outputted from the e and synchronous signal processing unit 9, recorded in the memory 12, and simultaneously stored in the memory 12. A controller 13 which detects the video signal in synchronization with the mother screen, and a synchronization signal included in the other video signal among the video signal output from the camera 1 and the video signal output from the playback circuit 4, The video signal output from the camera 1 and the video output from the playback circuit 4 by the synchronous separator 14 outputting to the controller 13 and the mother / sub picture switching pulses supplied from the controller 13. The switching element 15 is configured to switch a state in which the other image signal among the signals and the reduced image signal detected by the controller 13 are output.

Operation of the present invention having the configuration as described above is as follows.

First, when the user has operated a predetermined function key mounted in the camcorder to watch an image captured by the camera 1, the video signal output from the camera 1 is input to the second video signal in the PIP circuit 7. It is applied directly to the switching element 15 via the terminal Video2. At this time, since the PIP circuit 7 does not generate a magnetic screen, the controller 13 controls the switching element 15 to directly output the video signal supplied from the second video signal input terminal Video2. Therefore, the image signal supplied from the camera 1 is displayed in the viewfinder 5.

Next, when the user has operated a predetermined function key mounted in the camcorder to watch an image stored on the recording medium 2, the video signal reproduced through the reproduction circuit 4 is transferred to the second image in the PIP circuit 7. It is directly applied to the switching element 15 through the signal input terminal Video2. At this time, since the PIP circuit 7 does not generate a magnetic screen, the controller 13 controls the switching element 15 to directly output the video signal supplied from the second video signal input terminal Video2. Therefore, the image signal stored in the recording medium 2 is displayed in the viewfinder 5.

Finally, a predetermined image mounted in the camcorder for displaying on the viewfinder 5 a PIP screen whose video signal output from the camera 1 is the mother screen and the video signal reproduced from the recording medium 2 is the child screen. When the key is operated, the video signal output from the camera 1 is applied to one terminal of the switching element 15 through the second video signal input terminal Video2. Also, the video signal recorded on the recording medium 2 is reproduced by the reproduction circuit 4 and then to the luminance signal processor 8 and the chroma and synchronization signal processor 9 through the first video signal input terminal Video1. Each is input.

Here, the luminance signal processing unit 8 detects and processes only the luminance signal Y among the image signals input from the reproduction circuit 4, and the chroma and synchronization signal processing unit 9 receives the image input from the reproduction circuit 4. Among the signals, the chroma signal C and the synchronization signal are respectively processed.

The luminance signal Y signal-processed by the luminance signal processor 8 and the chroma signals RY and BY signal-processed by the chroma and synchronization signal processor 9 are synthesized by the synthesizer 10 into a complete video signal. Thereafter, the analog-to-digital converter 11 converts the image into a digital video signal. Thereafter, a digital image signal is applied to the controller 13. The controller 13 reduces the image signal to a predetermined size with respect to the entire screen in accordance with the synchronization signal processed by the chroma and synchronization signal processing unit 9 to store the memory. Save to (12).

Thereafter, the controller 13 detects the reduced image signal stored in the memory 12 so as to be synchronized with the synchronization signal applied from the camera 1 and detected by the synchronization separation unit 14, and then to the other terminal of the switching element 15. Is approved.

The switching element 15 has a switching state controlled according to the mother screen / sub picture switching pulse applied from the controller 13 so that the video signal of the mother screen applied from the camera 1 and the sub picture applied from the PIP circuit 7 can be obtained. A reduced video signal of is selectively output. Accordingly, the user can check the PIP screen using the mother screen and the child screen as the video signal applied from the camera 1 and the reduced video signal applied from the PIP circuit 7, respectively, with the viewfinder 5.

If the video signal reproduced from the recording medium 2 is used as the mother screen, and the PIP screen including the video signal output from the camera 1 as the child screen is displayed in the viewfinder 5, a predetermined key is mounted in the camcorder. Even when the operation is performed, the deformation can be easily carried out through the above-described process.

As a result, the present invention processes the image signal applied from the camera 1 and the image signal applied from the recording medium 2 into a mother screen and a child screen, respectively, and synthesizes the synthesized PIP screen. By displaying on the display, it can be very useful for the editing operation of the video signal recorded on the recording medium 2.

On the other hand, any one of the video signal applied from the camera 1 and the video signal applied from the recording medium 2 is the mother screen, and one of each video signal is reduced to the PIP circuit in order to reduce the other to its own screen. There is a need for means that can be applied selectively. Since the selection means can be sufficiently combined using various known techniques, it is apparent that the selection means can be easily implemented by those skilled in the art.

As a result, as described above, according to the method and apparatus for displaying a PIP screen of a camcorder according to the present invention, a PIP screen synthesized by combining a video signal supplied from a camera and a video signal provided from a recording medium into a mother screen and a child screen, respectively. Display on the viewfinder has the advantage that it can be very usefully used when performing editing operations using a camcorder.

In addition, the user does not need to have a separate editing equipment required for the editing, there is an advantage that the user can obtain the effect of cost reduction.

In addition, since the video signal supplied from the camera and the video signal provided from the recording medium are simultaneously displayed on the PIP screen on the viewfinder, the user does not need to switch between the camera video and the playback video reproduced from the recording medium. There is an advantage that can prevent the waiting time occurs when switching the screen between the camera image and the playback image.

Claims (3)

A function of displaying an image signal supplied from a camera onto a recording medium and displaying the image signal on a viewfinder, and displaying a reproduced image signal on the viewfinder by reproducing the image signal recorded on the recording medium. In the PIP screen display method of the camcorder having: The video signal supplied from the camera and the video signal recorded on the recording medium are respectively applied to reduce one of the video signals to a predetermined size with respect to the entire screen, and the reduced video signals are respectively reduced. And synthesizing the reduced video signal and the other video signal to be output to the viewfinder so as to be synchronized with the other video signal of the video signal. A camera for photographing a subject, a recording circuit for recording an image signal applied from the camera onto a recording medium, a reproducing circuit for reproducing the video signal recorded on the recording medium, and a video signal photographed by the camera; A camcorder comprising a viewfinder for displaying a video signal reproduced by the reproduction circuit, respectively: Receives a video signal photographed by the camera and a video signal reproduced by the playback circuit, respectively, to reduce any one of the respective video signals, and set the reduced video signal as the own screen and And a PIP circuit for synthesizing the child screen in synchronization with the mother screen by setting an image signal as the mother screen, and outputting the synthesized PIP screen to the viewfinder. The method of claim 2, wherein the PIP circuit, A luminance signal processor for detecting and processing a luminance signal included in any one of the image signal input from the camera and the image signal reproduced from the recording medium; A chroma and synchronous signal processor configured to detect and process a chroma signal included in the one video signal and to detect a synchronous signal included in the one video signal; A synthesizer for synthesizing the luminance signal signal processed by the luminance signal processor and the chroma signal signal processed by the chroma and synchronization signal processor; An analog / digital converter for converting an analog video signal synthesized by the synthesizer into a digital video signal; A memory for storing a video signal digitized by the analog / digital converter; A sync separator for detecting a sync signal from another video signal of each video signal; The image signal digitalized by the analog / digital converter is reduced to a predetermined size with respect to the entire screen and stored in the memory, and the other image signal is obtained by using the synchronization signal detected from the synchronization separator. A controller which detects the reduced image signal stored in the memory to be synchronized with the controller, and outputs a mother screen / sub picture switching pulse using a synchronization signal applied from the synchronization separator; And The other image signal and the reduced image signal are output on the viewfinder according to a mother screen / sub picture switching pulse applied from the controller so that the other image signal and the reduced image signal output from the controller are synthesized. PIP screen display device of the camcorder, characterized in that consisting of a switching element for switching the thing.