JPS61100083A - Picture record reproducing device - Google Patents

Abstract

PURPOSE:To project a desired scene in a continuous picture for a long time as a still picture by providing a D/A converting device that converts digital video signals outputted from a digital memory to analog video signals and sends out to a recording section and the outside. CONSTITUTION:A viewer operates an external switching device when a desired scene appears on the surface of the tube of a TV receiving set 4. Then, contact pieces of switches SW13, 15 are connected respectively to terminals 17, 18. When the viewer operates an external setting device under this condition, the contact piece of a SW19 is connected to a terminal 20, and video signals recorded on a digital memory section 7 are sent out to a D/A converter 8 according to pulse signals outputted from a frame selecting section 12. Digital video signals are converted to analog signals by the converter 8, and at the same time, false signals are inserted into the period corresponding to vertical and horizontal synchronous periods. Analog video signals outputted from the converter 8 are sent out to the receiving set 4 through the SW13 and record reproducing section 5, and projected on the surface of the tube as a still picture.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to an image recording and reproducing device such as a VTR device that is loaded with a recording medium and records and reproduces video signals on the recording medium. The present invention relates to an image recording and reproducing apparatus that is equipped with a television tuner section that selects a desired channel signal from among input signals, and is capable of methyl recording and reproducing a desired scene.

(Prior Art) In recent years, image recording and reproducing devices, especially VTR devices, have become widespread at a remarkable rate, and there are many opportunities to record and play back desired television programs by combining a VTR device with a television receiver or the like in each home.

Such VTR devices generally include a television tuner section that selects a video signal of a desired channel from among high-frequency signals transmitted from an antenna, and a television tuner section that records the image signal from the television tuner section on a magnetic tape, or a system that records the image signal from the television tuner section on a magnetic tape. It is equipped with a signal recording and reproducing section that reads information from the TV and reproduces it as a video signal, and an RF converter section that modulates the video signal from the television tuner section and sends it to the RF input terminal of the television receiver. ing. Normally, when recording a TV program with such a VTR device and monitoring it with a TV receiver at the same time, the video signal selected by the TV tuner section of the VTR device is sent to the pickup section and also sent to an external device. The image is transmitted to the television receiver, and the image is projected onto the screen of the television receiver.

By the way, when watching a television program, there are cases where it is desired to record only a specific scene (one frame or one field) rather than continuous recording. For example, a close-up of an idol singer's face or the address of a piece of mail is usually shown on the TV screen for just a few seconds in a continuous video, and the viewer sees that cut as a still image on the screen. There may be cases where you want to project the image on top of the screen for a better viewing experience, or you may want to copy the necessary information.

In such a case, it may be possible to activate the recording mechanism of the VTR device to record only the desired scene and project a still image of that scene on the screen in still mode, but this method has the following practical problems. It has the following drawbacks. That is, since there is a considerable time delay from when the viewer's eyes catch the scene desired to be recorded until the VTR starts recording, it is actually difficult to obtain the desired scene. Particularly in programs with fast action, if you operate the VTR after watching the instantaneous scene, it is usually not possible to record the video in time. However, for this reason, it is not practical to keep V and TR operating all the time, even if the tape is used repeatedly, from the viewpoints of tape life, equipment life, and power saving, and it is not necessary to always keep V and TR operating even though it is not necessary. It is not realistic even considering the time and effort required to operate the system.

Furthermore, it is not preferable to play back still images because leaving the VTR in still mode for a long time may damage the tape.

(Object of the Invention) In view of the above-mentioned circumstances, the present invention is capable of recording a desired scene in a continuous image displayed on a television receiver without missing the recording timing. It is an object of the present invention to provide an image recording and reproducing device that can display a scene as a still image for a long time.

(Structure of the Invention) The image recording and reproducing apparatus of the present invention is configured to constantly repeatedly write a video signal from a television tuner section into a digital memory means of a prescribed capacity for each prescribed frame or for each prescribed field, and to If you want to record a particular scene in a series of images of a television program, you can add a new one to the digital memory means by operating the signal selection means.
1! l! The writing of the image signal is stopped, and at the same time, the signal selection means selects a desired frame or field from among a small number of frames or a plurality of fields stored in the digital memory means, and the image forming the frame or field is selected. The signal is sent out for a desired time. Further, the analog video signal output from the above-mentioned television tuner section is converted into a digital video signal by the analog-to-digital conversion means, and is input to the digital memory means in the form of a digital signal, and the signal selection means The digital video signal in the digital memory means forming the selected frame or field is converted into an analog video signal by the digital-to-analog conversion means and output to the outside.

In addition, in the image recording and reproducing apparatus of the present invention, not only the video signal outputted from the television tuner section is configured to be inputted to the digital memory means, but also there is a possibility that the video signal may be recorded by an external operation. This also includes a case where the video signal output from the television tuner section is input to the digital memory means only for a certain period of time (for example, only when the viewer performs an operation to prepare for still recording in advance).

Further, the storage method of the digital memory means may be such that video signals forming all of a predetermined number of frames or fields from the moment when the signal selection means is operated to before that moment are stored, or, for example, the signal selection means may be stored. Video signals forming several frames or fields at predetermined time intervals (for example, 1 second) may be stored within a period of several seconds from the moment of operation to that moment.

Further, the image recording/reproducing apparatus of the present invention is not limited to a VTR apparatus, but also includes a recording/reproducing apparatus using, for example, a magnetic disk or an optical disk as a recording medium.

(Effects of the Invention) According to the image recording and reproducing device of the present invention, when a TV viewer finds a specific scene that he or she wants to record from among continuous screens of a TV program, for example, it takes time and effort to operate a switch for recording. However, the video signal from before the moment of the switch operation is already stored, and by selecting the video signal of a specific scene to be recorded from among the stored video signals, it is possible to record this specific scene to the recording medium. It can be easily recorded or displayed on a television receiver. Therefore, the timing for still recording the scene you want to record will not be missed.

Furthermore, the video signals stored in the digital memory section can be easily and freely recalled by specifying the memory address one after another while incrementing the memory address, making it possible to perform various trick plays including displaying still images. can be done.

Furthermore, even if such trick play is performed for a long time, it does not cause any damage or wear to the recording medium, so it has extremely high practical value.

(Embodiment) Embodiments of the present invention will be described below.

The drawing is a block diagram showing one embodiment of a VTR device according to the present invention. In this actual M embodiment, a TV tuner section 3 selects a video signal of a desired channel from among the signals flowing from an antenna 1 through a feeder line 2, amplifies and outputs the video signal.
, a recording/reproducing section 5 that records the video signal from the TV tuner section 3 onto a magnetic tape and sends the video signal from the TV tuner section 3 to the TV receiver 4; an A/D converter 6 that performs A/D conversion and outputs the A/D converter 6; a digital memory unit 7 that includes a plurality of video RAMs that stores the digital video signal output from the A/D converter 6 according to a predetermined method; It consists of a D/A conversion section 8 that converts a video signal forming a frame selected by a predetermined operation from among the digital video signals stored in the digital memory section 7 and sends it to the recording/reproducing section 5. ing. The recording and reproducing section 5 also includes a synchronization separation circuit 9 that extracts a vertical synchronization signal of the video signal from the TV tuner section 3, and outputs the video signal from the TV tuner section 3 from the digital memory section 7 via the D/A converter section 8. RF modulates the video signal reproduced from the magnetic tape and the video signal reproduced from the magnetic tape and outputs it to the TV receiver 4.
A converter 10 is provided. Further, in this embodiment, a frequency divider circuit 11 that divides the frequency of the vertical synchronization signal from the synchronization separation circuit to generate a signal acquisition clock for the digital memory section 7 is provided.
and a frame selection section 12 that generates a selection pulse for selecting a video signal forming a desired frame from among the video signals stored in the digital memory section 7.

Next, the operation of this embodiment will be explained separately for the case where TV programs are continuously recorded and the case where only one cut of the TV program is obtained.

When recording TV programs continuously, the SWI 3 is connected to the terminal 14, and as a result, the video signal from the recording unit 3 is recorded on a magnetic tape in the recording/reproducing unit 5, and is also converted to RF by the RF converter 10. The signal is modulated and sent to the TV receiver 4, where a continuous image is displayed on the screen. Note that in this case, 5W15 can also be set to work in conjunction with 5W14.

If only one cut of the TV program is to be obtained, initially 5w13 and SWl 5 are connected to terminals 14 and 16, respectively. Continuous images of a TV program are displayed on the screen of the TV receiver 4 in the same way as when continuous images are recorded. Also,
The video signal from the TV tuner section 3 is converted into a digital signal by the A/D conversion section 6 and input to the digital memory section 7, and this clock is stored in the memory section 7 in synchronization with the signal acquisition clock from the frequency dividing circuit 11. The video signal for one frame from the time of input to the digital memory section 7 is stored in the digital memory section 7 with the vertical and horizontal synchronization signals removed. The A/D converter 6 converts the color video signal to 7.16MHz (3,58MHz
Digital conversion is performed with a sampling frequency of zx2) and a quantization number of 7 bits, and the digital memory section 7 has a sampling frequency of 2
56 and 20 video RAMs each having one bit each time, it is possible to store video signals for five frames compressed to 1M bits. In addition, the signal acquisition clock is a pulse signal every second obtained by dividing the frequency of the vertical synchronization signal separated by the synchronization separation circuit 9 by 1/60, and this clock is input to the digital memory section 7. A video signal for one frame is stored in the digital memory section 7 from this clock input in synchronization with the timing. The video signal stored at this time is written to the same address position as the video signal stored 5 seconds ago, for example, so the video signal @ stored 5 seconds ago is erased and there are always 5 frames stored in this memory section 7. Video signals for 10 minutes are stored.

When a desired scene appears on the TV screen, the viewer can switch between 5W13Jj and S by operating the external switching means.
The contacts of WI 5 are connected to terminals 17 and 18, respectively. As a result, the input of the signal acquisition clock to the digital memory section 7 is cut off, and writing of the video signal in this memory section 7 is stopped. In addition, the input of the video chair output from the TV tuner section 3 to the recording/reproducing section 5 is also cut off.
Therefore, no image is projected on the screen of the TV receiver 4. If the viewer operates the external setting means in this state, S
The contact piece of the WI 9 is connected to the terminal 20, and the video signal stored in the digital memory section 7 is sent to the D/A conversion section 8 in response to the pulse signal output from the frame selection section 12. The D/A converter 8 converts the digital video signal into an analog video signal, and inserts a pseudo signal into the period corresponding to each vertical and horizontal synchronization period, and then outputs the signal from the D/A converter 8. The analog video signal is SW
13, and is sent to the TV receiver 4 via the recording/reproducing section 5. Therefore, each frame formed by the video signal stored in the digital memory unit 7 is sequentially displayed on the screen of the TV receiver @ IfiJ4 for a predetermined period of time, and it is viewed as an appropriate frame among these five frames. Only the frames selected by the user are displayed on the screen as still images by frame designation operations from the frame selection section 12.

At this time, if the recording/reproducing section 5 starts a recording operation on the magnetic tape, only the video signal forming the selected frame can be continuously recorded on the magnetic tape. Furthermore, if the frame selection section 12 is set to select any number of frames among the five frames, a frame-off image can be projected on the screen, allowing the user to enjoy trick play.

In addition, when you want to watch the continuous images of the TV program again, operate the external switching means mentioned above to switch between 5W13 and SW15.
The contacts are connected to terminals 14 and 16, respectively.

In this embodiment, the period of the signal acquisition clock is 1 second, and the capacity of the digital memory section 7 is 5 frames, but of course this is not limited to this, and it can be changed as appropriate depending on the application. You can set it to a value.

In addition, in this embodiment, the video signal output RF modulated by the RF converter 10 is converted to the RF of the TV reception tl [4].
Although the video signal is inputted to the input terminal, it is of course possible to output the video signal as it is (video signal as it is) and input it to the video input terminal of the monitor.

[Brief explanation of drawings]

The drawing is a block diagram showing one embodiment of an image recording and reproducing apparatus according to the present invention. 3...TV tuner 4...TV receiver 5
... Recording/playback section 6... A/D conversion section 7.
・Digital memory 8 ・D/A converter 12 ・
...Frame selection section 13.15.19...Switch (voluntary) procedure Ne Ftj Seien, Commissioner of the Patent Office December 12, 1981 1, Incident display image (Image recording and reproducing device 3, correction/correction) Relationship with the patent applicant case Address: 210 Nakanuma, Minamiashigara City, Kanagawa Prefecture Name:
Fuji Photo Film Co., Ltd. 4, Agent 5, Date of amendment order None 6, Number of inventions increased by amendment None 7, Subject of amendment Column 8 of “Detailed description of the invention” of the specification, Contents of amendment

Claims (1)

[Scope of Claims] A television tuner unit that selects and outputs a desired video signal from high-frequency signals transmitted from an antenna, and a recording unit that records the video signal output from the television tuner unit on a recording medium. An image recording and reproducing apparatus comprising: analog-to-digital conversion means for converting an analog video signal from the television tuner section into a digital video signal and outputting the digital video signal; and converting the digital video signal output from the conversion means into a plurality of frame periods or a plurality of frame periods. A digital memory means for writing over a field period, and a frame for stopping writing to the digital memory means in response to an external operation to frame a desired video signal from video signals already written to the digital memory means. a signal selection means for selecting in units or field units and outputting it from the digital memory means; and a digital-to-analog conversion means for converting the digital video signal output from the digital memory means into an analog video signal and sending it to the recording section and outside. An image recording and reproducing device comprising: means.