KR100219128B1 - Video record reproducing device - Google Patents

Abstract

The present invention relates to an image recording and reproducing apparatus capable of displaying an image on a computer monitor. The video recording and reproducing apparatus of the present invention includes a video signal converting means for converting a video signal so that a received video or a video signal reproduced from a recording medium can be displayed on a high resolution computer monitor. The video signal converting means includes a color signal separator, a synchronous signal separator, a clock doubler which increases the frequency of the separated horizontal synchronous signal to match the horizontal frequency used in the VGA monitor, and separate color signals R, G, B) a memory for storing the memory, a memory manager for controlling the writing and reading of the memory so that the color signals stored in the memory correspond to the horizontal scan line of the VGA monitor, a clock generator for operating each component, and the color signals and the horizontal and vertical synchronizers. It consists of a connector for transmitting signals to the VGA connector.

Therefore, the present invention provides an effect of expressing the video signal of the video recording / reproducing apparatus on a high resolution computer monitor by purchasing a separate device.

Description

Video recorder that can display video on computer monitor

1 is a block diagram showing an image recording and reproducing apparatus capable of displaying an image on a computer monitor according to a preferred embodiment of the present invention.

FIG. 2 is a conceptual diagram for explaining the operation of the video signal converting means in the video recording and reproducing apparatus of FIG.

* Explanation of symbols for main parts of the drawings

10: VCR means 21: volume unit

23 amplifier 25 speaker

30: video signal conversion means 3l: color signal separation unit

32: sync signal separator 33: clock doubler

34: clock generator 35: memory manager

36A, 36B, 36C: A / D Converter 37A, 37B, 37C: Memory

38A, 38B, 38C: D / A Converter 39: Connector

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a video signal conversion system for displaying a video signal reproduced by a video recording / reproducing apparatus such as a video cassette recorder or a video tape recorder using a computer monitor. A recording and reproducing apparatus.

In general, in a video recording / reproducing apparatus such as a VTR or VCR, a video signal reproduced in connection with a television receiver is displayed on a television receiver. However, in recent years, efforts to obtain high quality images have been demanded, and interest in compatibility with computer monitors, which are high resolution monitors, and existing image media has been expanded. The computer monitor is almost similar to the form in which an antenna unit for receiving radio waves sent from a television station from a television receiver and a tuner unit for separating them are removed. Thus, a prior art has been proposed that allows a TV monitor to be embedded in a computer so that the television can be viewed on a computer monitor.

On the other hand, in the video recording and playback apparatus, in order to display the video signal received or reproduced from the recording medium, an effort to use not only the television receiver but also computer monitors have been required to be compatible. In order to realize this, conventionally, a video signal converting device is installed separately from the video recording / reproducing apparatus to convert the video signal reproduced by the video recording / reproducing apparatus to be displayed on the monitor.

However, in the related art, in order for a user to use an image recording / reproducing apparatus and a high-definition computer monitor interchangeably, a user needs to purchase an image signal converting apparatus separately, which causes a lot of economic burden to the user and hassle.

Accordingly, an object of the present invention is to provide an image recording and reproducing apparatus in which an image signal converting apparatus is embedded in an image recording and reproducing apparatus so that the image can be displayed on a high-definition computer monitor without a separate device. .

An image recording and reproducing apparatus capable of displaying an image on a computer monitor of the present invention for achieving the above object includes an image recording and reproducing apparatus for recording or reproducing an image and an audio signal, and displaying the reproduced image and audio signal through a television. In order to display the video signal on the computer monitor, the video signal conversion means for converting the video signal to meet the video card standard of the computer monitor, and adjusting the volume of the audio signal for transmitting the user to listen Voice signal generating means.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an image recording and reproducing apparatus capable of displaying an image on a computer monitor according to the invention. The video recording and reproducing apparatus shown in FIG. 1 is divided into a general VCR means 10 and a video signal converting means 30. FIG. The VCR means 10 uses one of a tuner unit 1l for receiving a television signal RF, one of an image signal generated by the tuner unit 11, and an image signal received through a line terminal of the VCR component. A first selection unit 13 is selected according to an input and selects one of a voice signal generated by the tuner unit 11 and a voice signal received through a line terminal of the VCR main body according to a user's external key input. The playback recorder 15 is connected to the output terminal of the first selector 13. The playback recorder 15 records or plays back input video and audio signals on a recording medium. At the output terminal of the playback recorder 15 and the tuner section 11, one of the video signal generated by the tuner section 11 and the video signal reproduced by the playback recorder 15 is selected according to a user's external key input. A second selector 17 for selecting one of the voice signal generated by the voice signal 11 and the voice signal signal reproduced by the playback recorder 15 is selected according to a user's external key input. An output terminal of the second selector 17 is connected to a modulator 19 that modulates the selected video and audio signals for transmission to a television. The VCR means 10 having such a configuration is further provided with a volume unit 21, an amplifier 23 and a speaker 25 for adjusting the volume for the present invention.

On the other hand, the video signal converting means 30 incorporated in the video recording / reproducing apparatus is a color signal for separating red (R), green (G), and blue (B) color signals from the video signal selected by the second selector (17). And a synchronizing signal separating unit 32 for separating the horizontal and vertical synchronizing signals from the video signal. Three A / D converters 36A, 36B, and 36C are connected to an output terminal of the color signal separator 31 to convert red (R), green (G), and blue (B) color signals into digital forms, respectively. Three A / D converters 36A, 36B, and 36C store digital (R), green (G), and blue (B) color signals, and store the stored digital (R), green (G), and blue (B). Three memories 37A, 37B and 37C for outputting color signals are correspondingly connected. The three memories 37A, 37B and 37C have three D / A converters 38A, 38B and 38C for converting digital (R), green (G) and blue (B) color signals read from the memory into analog form. ) Are correspondingly connected. The sync signal separator 32 is connected to a clock doubler 33 that doubles the frequency of the horizontal sync signal. The synchronization signal separator 32 is also connected in parallel with the clock doubler 33, and is connected to a memory manager 35 for generating a control signal for controlling write and read operations of the memories 37A, 37B, and 37C. do. The A / D converters 36A, 36B, 36C, the D / A converters 38A, 38B, 38C, and the memory manager 35 are connected to operate in synchronization with the clock signal generated by the clock generator 34. A connector 39 connected to the VGA card connector of the computer monitor is connected to the D / A converters 38A, 38B, 38C, the clock blur 33, and the synchronization signal separator 32.

The operation of the video recording / reproducing apparatus capable of displaying an image to the computer monitor of the present invention configured as described above will be described in detail.

First, the general recording and reproducing operation of the video recording and reproducing apparatus will be described. In the video recording / reproducing apparatus, the VCR means 10 tunes the broadcast signal for the desired channel through the tuner unit 11 by adjusting the frequency of radio waves received through the antenna. The tuned broadcast signal is output separately from a video signal and an audio signal. The first selector l3 selects one of the video and audio signals output from the tuner unit 11 and the video and audio signals input through the line terminal of the VCR main body and supplies them to the playback recorder l5. The playback recorder 15 records or reproduces the inputted video and audio signals on a recording medium and outputs them. The second selector 17 selects one of the video and audio signals output from the playback recorder 15 and the video and audio signals output from the tuner 111 and supplies the same to the modulation unit l9. The second selector 17 also supplies the selected video and audio signals to the line terminals of the TV body. The modulator 19 modulates the input video and audio signals in a form for transmitting to a television (TV) and outputs the modulated signals. The video and audio signals transmitted to the television (TV) are displayed on the receiver of the television to be viewed. Next, the operation of the present invention for displaying an image on a computer monitor will be described.

The video signal converting means 30 converts the video signal selected by the second preliminary unit 17 of the VCR means 10 to conform to the VGA standard, which is the video card of the computer monitor. The red (R), green (G) and blue (B) color signals are separated from the video signal. This composite video signal is also input to the sync signal separator 32 to be divided into a horizontal sync signal and a vertical sync signal. In the case of the general-purpose VGA monitor, the horizontal frequency is 31.5kHz and the vertical frequency is 60Hz. However, the frequency of the horizontal synchronization signal separated by the synchronization signal separator 32 is 15.75kHz, the frequency of the vertical synchronization signal is 60Hz. As such, the vertical synchronization signal is represented by the same frequency, but the frequency of the horizontal synchronization signal used in the VGA is twice as high as the frequency of the horizontal synchronization signal separated by the synchronization signal separator 32. Therefore, it is necessary to match the frequency of the horizontal synchronous signal separated by the synchronization signal separator 32 with the frequency of the horizontal synchronous signal used in the VGA. Thus, the clock doubler 33 doubles the frequency of the horizontal synchronization signal applied from the synchronization signal separator 32. However, if the horizontal frequency is simply doubled, the original image as shown in FIG. 2A overlaps the left and right sides of the screen as shown in FIG. 2B, and the image cannot be recognized. The reason why this happens is that in VGA, where the horizontal frequency is twice as fast as the video signal, the horizontal scanning period takes ½ hour between the syringes of the video signal. For this reason, when the horizontal scan starts, the time when the VGA ends is only ½ scan of the image, so the other half is displayed during the next horizontal scan period of the VGA. As a result, the ½ level of the image is displayed on the VGA screen during the first horizontal scanning period, and the remaining ½ level of the image is displayed during the first horizontal scanning period, so that the left and right sides of the screen overlap and double, resulting in an unrecognizable state of the image. In order to solve this phenomenon, the video signal converting means 30 of the present invention includes the A / D converters 36A, 36B, 36C, the D / A converters 38A, 38B, 38C, and the memory 37A, 37B, 37C, A memory manager 35, a clock generator 34, and the like. These configurations work as follows:

The red (R), green (G), and blue (B) color signals separated by the color separation unit 31 are input to the corresponding A / D converters 36A, 36B, and 36C. The A / D converters 36A, 36B, and 36C convert each of the red (R), green (G), and blue (B) color signals inputted according to the clock signal generated by the clock generator 34 into digital data. Digital red (R), green (G), and blue (B) color signals are respectively input to the corresponding memories 37A, 37B, 37C. The memory 37A, 37B, 37C stores or stores digital red (R), green (G), blue (B) color signals input under the management of the memory manager 35, or stored digital red (R), green (G), Outputs a blue (B) color signal. The memory manager 35 receives a horizontal synchronous signal whose frequency is doubled in the clock doubler 33 and a vertical synchronous signal separated by the synchronous signal separator 32 and a clock signal generated by the clock generator 34. Controls the write and read operations of (37A, 37B, 37C). The memory manager 35 records the digital red (R), green (G), and blue (B) color signals applied from the A / D converters 36A, 36B, and 36C to the memories 37A, 37B, and 37C. The digital red (R), green (G), and blue (B) color signals recorded in the memories 37A, 37B, and 37C are read twice as fast as the horizontal scan time of the VGA monitor. The memory manager 35 also has a digital scan (R), green (G), blue, horizontal scan line unit recorded in the memory (37A, 37B, 37C) because the horizontal scan player of VGA is twice the scan player of the video signal. (B) Control the color signal to be read twice in the horizontal scanning period. The D / A converters 38A, 38B, and 38C convert the respective digital red (R), green (G), and blue (B) color signals read from the memories 37A, 37B, and 37C into analog signals. The connector 39 of the video signal conversion means 30, which is connected to the connector of the VGA monitor, has analog red (R), green (G), blue (supply) supplied from three D / A converters 38A, 38B, and 38C. B) The color signal and the clock doubler 33 receive the horizontal synchronous signal whose frequency is doubled to match the horizontal frequency of the VGA monitor and the vertical synchronous signal separated from the synchronous signal separator 32, and transfer them to the connector of the VGA monitor. To create a VGA. Thus, the image is displayed on the monitor (not shown) connected to the VGA card.

On the other hand, the voice signal selected by the second selector 17 of the VCR means 10 is adjusted to an appropriate volume in the volume 21 and then transmitted to the amplifier 23. The amplifier 23 amplifies the volume-adjusted voice signal to a predetermined size and then outputs it for the user to hear through the speaker 25.

As described above, an image recording and reproducing apparatus capable of displaying an image on a computer monitor according to the present invention uses a video signal conversion apparatus such as a VCR to display an image on a high quality computer monitor instead of a television receiver. Compared with the conventional installation of the video recording and reproducing apparatus, the video signal conversion apparatus is built-in, so that it is possible to directly watch a video monitor by directly connecting to a computer monitor without purchasing a separate video signal conversion apparatus.

Claims (9)

A video recording and reproducing apparatus for recording or reproducing video and audio signals and for displaying the reproduced video and audio signals on a television, comprising: video signal converting means for processing the video signals to be displayed on a computer monitor; And a sound signal generating means for adjusting a volume of the sound signal so that the user can listen to the sound signal. 2. The apparatus of claim 1, wherein the video signal converting means comprises: a color signal separator for separating red (R), green (G), and blue (B) color signals from the video signal; A synchronization signal separation unit for separating the horizontal synchronization signal and the vertical synchronization signal from the image signal; a horizontal frequency adjusting unit for adjusting the frequency of the horizontal synchronization signal to match the horizontal frequency used in the monitor of the computer; A memory for storing or outputting the red (R), green (G), and blue (B) color signals; receiving the red (R), receiving the vertical synchronizing signal and the horizontal synchronizing signal adjusted by the horizontal frequency adjusting unit; A memory manager for controlling the storage and output of the memory to match the green (G) and blue (B) color signals to the horizontal scan time and horizontal scan line of the computer monitor; And a horizontal (R), green (G), and blue (B) color signal output from the memory and the vertical synchronous signal and the horizontal synchronous signal adjusted by the horizontal frequency controller, and transmitted to the connector of the computer monitor. An image recording and reproducing apparatus capable of displaying an image on a computer monitor comprising a connector. 3. The A / D converter of claim 2, wherein the color signal separation unit and the memory are connected with three A / D converters for converting red (R), green (G), and blue (B) color signals into digital data. Video recorder that can display video on computer monitor. 4. The computer of claim 3, wherein the memory and the connector are connected with three D / A converters for converting digital red, green, and blue color signals into analog signals, respectively. Video recorder that can display video on the monitor. The image recording and reproducing apparatus according to claim 4, wherein a clock generator for generating a clock signal is connected between the A / D converter, the memory manager, and the D / A converter. The image recording and reproducing apparatus according to claim 2, wherein the horizontal frequency adjusting unit doubles the frequency of the horizontal synchronization signal to match the horizontal frequency of the computer monitor. The red (R), green (G), blue (B) recorded in the memory of claim 6, wherein the memory manager records the red (R), green (G), and blue (B) color signals in the memory. An image recording and reproducing apparatus capable of displaying an image on a computer monitor, wherein the time of reading a color signal is doubled to match the horizontal scanning time of the computer monitor. According to claim 7, wherein the memory manager repeats the number of times of reading the red (R), green (G), blue (B) color signal of the horizontal scanning unit recorded in the memory and repeats the horizontal scan player of the computer An image recording and reproducing apparatus capable of displaying an image on a computer monitor, wherein the image is matched. The apparatus of claim 1, wherein the voice signal generating means comprises: a volume unit for adjusting a volume of the voice signal; An amplifier for amplifying the volume-adjusted voice signal to a predetermined size; And a speaker for transmitting the amplified audio signal. A video recording and reproducing apparatus capable of displaying an image on a computer monitor.