KR19990041870A - Image storage and output device of television - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still image storage and output apparatus for a television that stores images of a television and can be viewed through a television receiver if necessary, or can be output through a printer or a personal computer. A video storage unit under the control of a microcomputer is installed in a television having an OSD function, and the output signal of a video player such as a television or a VCR that is currently being broadcasted is stored one frame at a time according to a control signal of a remote controller. You can watch stored still images displayed on the OSD screen through the television receiver or print them on paper using an output device such as a color printer, or print them out to a personal computer and save them as a file or monitor them. It is an invention to make.

Description

Image storage and output device of television

The present invention relates to an apparatus capable of storing and arbitrarily outputting an image of a television. In particular, a video storage and output apparatus for storing an image of a television currently being displayed or an output image of a video player such as a VCR, and outputting it by one frame and outputting it to a television receiver, a printer, or a personal computer. fo image for television).

In general, a television receives a plurality of broadcast signals transmitted from a broadcasting station and tunes to a broadcast channel that a user wants to watch. Since the conventional television is to watch the video received in real time through the receiving hall of the television, there is no way to see it again by the viewer's circle because important scenes or scenes that you want to watch again pass by in a moment. .

The present invention has been made to solve the above-mentioned deficiency of the conventional television, and an object of the present invention is to store the output video signal of a video player such as a television or a VCR by one frame, and watch it with a television receiver whenever necessary, and then to a color printer. The video storage unit is installed on the television so that it can be printed out and watched or output to a personal computer and saved as a file. The TV video signal can be stored as a still picture frame by frame and controlled by a remote controller. And an output device.

1 is a block diagram of an embodiment of the invention.

FIG. 2 is a block diagram of an image storage unit, which is a main component of the embodiment of the present invention of FIG. 1.

3 is an exemplary view of an OSD screen displaying screen storage information of the present invention.

<Description of Symbols for Main Parts of Drawings>

1 antenna 2 tuner part

3: IF detector 4: P / S separator

5: voice signal processor 6: voice amplifier

7: Speaker 8: Image signal processing unit

9: Image output unit 10: CRT

11: OSD Processing Unit 12: Remote Controller

13: Receiver 14: Micom

15: Image storage unit 16: External input unit

17: printer

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the preferred embodiment to achieve the above object of the present invention will be described in detail.

1 is a schematic block diagram of an embodiment of the invention. An antenna (1) for receiving a plurality of NTSC composite video signals transmitted from a television broadcasting station, a tuner unit (2) for tuning a broadcast channel that a user wants to watch among the broadcast signals output from the antenna (1), and the tuner unit ( P / S separating unit 4 for separating audio signal and video signal from analog composite video signal applied from 2) and remaining color signal components in audio signal separated and output from P / S separating unit 4 The voice signal processor 5 for removing the signal and performing signal processing, the voice amplifier 6 for power amplifying and outputting the signal to the speaker 7 by receiving the signal from the voice signal processor 5, and separating the P / S. A video signal processor 8 which separates luminance and color signals from the video signal output from the unit 4 and performs signal processing, and performs color signal processing on the video signal output from the video signal processor 8 to the CRT 10. Image output section 9, remote control OSD processing unit 11 for implementing the OSD screen on the CRT 10 under the control of the microcomputer 14 by receiving the operation signal of the roller 12, and controlling the screen storage signal or various functions from the remote controller 12. A control signal is received from the micom 14 and the micom 14 which output the control signal by the screen storing signal applied from the receiver 13 of the television receiving the signal, the reception unit 13 above. An image such as an image storage unit 15, a VCR, etc. which stores an image corresponding to one frame from the image signal processing unit 8 and outputs the still image to the CRT 10 and the printer 17 according to an output control signal. An external input unit 16 for receiving a video signal from a playback device, and a printer 17 for printing and outputting a still image output from the video output unit 15.

The operation of the embodiment of the present invention of Figure 1 will be described. When a user watches a television and displays a screen to be stored in a program that is broadcasted, a control signal is applied to the receiver 13 of the television by pressing a screen storage key installed in the remote controller 12. The receiving unit 13 receives the signal applied from the remote controller, converts the signal into a specific signal, amplifies the signal, and applies the signal to the microcomputer 14. The microcomputer 14 applies the control signal to the image storage unit 15 according to the applied screen storage signal. The image processing unit 15 receiving the image storage control signal receives the analog image signal from the image signal processing unit 8, converts the analog image signal into a digital image signal, and stores each frame as a still image. . The same applies to the case where the video signal is reproduced and viewed using the VCR. In this case, however, the video signal input from the external input unit 16 is received and stored one frame at a time.

When the user wants to output the still image stored in the above process to the printer for viewing, the user inputs a signal to the receiving unit 13 by pressing the storage screen output key installed in the remote controller. The microcomputer receiving the output signal of the receiver applies the OSD control signal to the OSD processor 11 to display the stored still image information on the screen. While viewing the saved information displayed on the OSD screen, the user operates the remote controller's up / down keys to select a still image to be output and grants an output command. When the output command of the selected still picture is applied, the image storage unit 15 displays the still picture on the CRT 10 under the control of the microcomputer, and simultaneously outputs the still picture to the printer 17 connected to the television. .

When the image is to be stored in the image storage unit 15 as a still image, a plurality of still images may be stored, and the image storage unit 15 may be used to easily identify a still image to be output from among the stored plurality of still images. ), The OSD processing unit 11 displays the OSD screen so that a plurality of storage lists can be written on the screen as shown in FIG. 3.

FIG. 2 is a block diagram of the image storage unit 15, which is a main part of the configuration of the present invention of FIG. A signal processing circuit 20 for receiving an NTSC video signal input from the video signal processing unit 8 and processing the signal, and converting an analog NTSC signal applied from the signal processing circuit 20 into a digital video signal; The D converter 21, the field memory 22 for storing the digital image data applied from the A / D converter 21 one frame at a time, and the digital image data stored in the field memory 22 are stored in the CRT ( 10) a D / A converter 23 for converting to an analog video signal for outputting a still image, a printer output terminal for outputting a still image of the field memory unit 22 to a printer, and the A / D The memory controller 24 which applies a control signal to the converter 21, the field memory 22 and the D / A converter 23, generates pulses according to the signals applied from the signal processing circuit 20. Consists of a pulse generator 25 provided to the memory controller 24 The.

The operation of the image storage unit 15, which is the main part of the present invention having the above configuration, will be described. The signal processing circuit 20 and the pulse generator 25, in this case, generate a clock that becomes a reference in constructing the system from the input NTSC composite video signal. The composite video signal itself is converted into a signal suitable for A / D conversion. To do this, the burst signal is separated from the composite video signal. Then, a clock fsc (= 3.58 MHz) synchronized with the burst signal and a reference clock 3fsc multiplied by three are made. The composite synchronous signal is separated by a synchronous signal separation circuit. The multiplication signal 40fh of the vertical synchronizing signal and the horizontal synchronizing signal is generated from the complex synchronizing signal and applied to the memory controller 24 together with fsc and 3fsc. In addition, the input video signal is applied to the A / D converter 21 through a sync chip clamp circuit which fixes the leading end of the synchronization signal at a constant potential.

A sink chip clamp is a circuit that fixes the leading voltage of a synchronous signal at a constant potential. The DC level of each line of the input signal is kept constant, and the effect of glitches caused by D / A conversion on the screen is reduced.

On the other hand, color signals are extracted from the composite signal through a band pass filter (BPF) of 3.58 MHz. First, a clock fsc is generated in synchronization with the burst signal of this color signal.

From the separated composite synchronization signal, a 40fh signal (a frequency 40 times the horizontal synchronization frequency fh 주파수 629.37 MHz) is synchronized with this. The fsc signal is shaped into a clean square wave using an HC-MOS inverter. From this, 3 times the harmonic 3fsc (≒ 10.7MHz) is extracted and used for the reference clock for A / D, D / A conversion, and memory control.

In the memory controller 21, the A / D converter 21, the field memory 22, and the D / A converter 23 are supplied from the fsc, 3fsc, Csy, Vd, and 40fh signals supplied from the pulse generator 25. Generates a signal to control.

Referring to the operation of the field memory 22 described above, in the case of the NTSC composite signal, one frame is composed of two fields by interlaced scanning. The operation of memorizing one frame of image in the field memory stores one frame as one unit, and stores the first to second 273th lines and the 525th line of the immediately preceding frame in the memory. The vertical driving section of the second field is stored in this case because when reading continuously with only the signal of the first field, 0.5H skew occurs between the fields. The memory of the 525th line is only part of the line that is actually stored in the memory. For this reason, it is possible to prevent the storage information of the falling portion of the synchronization signal of the first line when the first line is stored. In order to read out the memorized image and output it to the CRT 10 and the printer while the image of one frame is written by the above process, the image signal period of the second field is the signal of the first field stored in the memory. Replenish As for the vertical synchronization period, the first field and the second field are read alternately. In this way, the read signal can be converted into an analog signal, output to the CRT 10 for display, and the digital still image read out above can be output to a printer through an interface for printing.

By the configuration and operation as described above, the user stores the video of each frame by the operation of the remote controller while watching the playback video signal of the television broadcast or the VCR, and the characteristics of the stored video signal are shown in the OSD screen as shown in FIG. Make a list according to the information displayed. If the user wants to output the stored video signal later, use the remote controller to output the list of stored video signals on the OSD screen and display the still image on the television by selecting the output command by the user. Can be printed and printed out.

As described above, the present invention provides an image storage unit under the control of a microcomputer in a television having an OSD function so that an image can be stored in a television. The output signal is stored one frame at a time, and the user can watch the stored still image displayed on the OSD screen of the television through the television receiver or print it on paper or the like using an output device such as a color printer. There is.

Claims (3)

In a television capable of storing a television video signal or a reproduced video signal of a video reproducing apparatus and outputting it when necessary, Control signal applying means for transmitting a storage command signal of the screen or an output command signal of the storage screen to the remote controller 12 and receiving the screen storage signal from the receiving unit 13 of the television; While writing the list of the stored screen on the OSD screen implemented by the OSD processing unit 11 under the control of the microcomputer 14, the screen currently displayed on the screen according to the storage command signal applied from the control signal applying means 1 Screen storage means for storing frame by frame, Output screen selecting means for selecting a storage screen to be output in accordance with the output command signal applied from said control signal applying means; And a storage screen output means for displaying a storage screen selected by the output screen selection means on a television and simultaneously outputting the storage screen to a printer or a personal computer. 2. The apparatus of claim 1, wherein the screen storing means comprises: a signal processing circuit 20 for receiving a NTSC video signal and processing the signal; An A / D converter 21 for converting an analog NTSC signal applied from the signal processing circuit 20 into a digital video signal; A field memory 22 for storing the digital image data applied from the A / D converter 21 one frame at a time; A D / A converter 23 for converting the digital video data stored in the field memory 22 into an analog video signal for outputting a still picture; A printer output stage for outputting a still image of the field memory section 22 to a printer; A memory controller 24 for applying a control signal to the A / D converter 21, the field memory 22, and the D / A converter 23; And a pulse generator (25) for generating a pulse in accordance with a signal applied from the signal processing circuit (20) and providing it to a memory controller (24). The method according to claim 1 or 2, wherein the output screen selection means is selected by a remote controller while viewing the list of OSD screens implemented by the OSD processing unit 11 under the control of the microcomputer 14. Video storage and output device for television.