KR100209887B1 - Method for displaying and video device with play back function - Google Patents

Abstract

The present invention relates to a video device having a playback function and a display method thereof. The present invention compresses and stores an image from a video signal source at regular intervals, and stores a main image and a pre-stored auxiliary image when a user requests. By mixing the main image and the pre-stored auxiliary image on the screen at the same time, there is an effect that can be displayed immediately through the screen without the cumbersome operation that requires the use of a recorder to reproduce the scene you want to see again.

Description

Video device with playback function and its display method

1 is a block diagram of a video device having a playback function according to the present invention.

Figure 2 (a) is a screen state showing that the image is displayed on the screen.

2 (b) is a screen state showing that the main image and the auxiliary image is displayed together.

* Explanation of symbols for main parts of the drawings

10: main image processing unit 20: vertical / horizontal synchronous signal generator

25: reading address generator 30: auxiliary image processing unit

40: mixing section 50: microcomputer

The present invention provides a video device capable of displaying two or more images, and compresses and stores the image supplied from the video signal source at regular intervals, and if necessary, displays the main image and the pre-stored auxiliary images on the screen at the same time. A video apparatus having a playback function for easily reproducing a desired scene and a display method thereof.

In recent years, as a TV receiver having a picture-in-picture (PIP) function has become popular, more than two channels of images can be viewed through a single screen. In a TV receiver having a PIP function, a plurality of tuners are provided for tuning one or more channels. The video signals of each tuned channel are individually processed and mixed before being displayed to form two channels of video on the screen. While watching the video of a certain channel, it is possible to watch the video of other channels reduced in the vertical and horizontal directions, so that the channel setting operation for storing other channels and the channel search operation for finding the desired channel can be performed in parallel with the operation of watching a broadcast program. there was.

However, in order to see a particular scene again from the scene being viewed through the screen, it is difficult to immediately reproduce the scene to be watched again because the desired video must be recorded using a recording / playback device such as VTIAL.

An object of the present invention is to compress and store the image supplied from the video signal source at regular intervals, and to play and display the main image and pre-stored sub-images simultaneously on one screen through simple key manipulation of the user if necessary. A display method of a video device having a back function is provided.

Another object of the present invention is to provide a video device having a playback function in hardware implementation of the above display method.

SUMMARY OF THE INVENTION An object of the present invention is a method for displaying a main image and an auxiliary image together on a screen, wherein the first image data supplied from an image signal source is displayed and stored as it is, and the first image data is compressed at a second compression ratio. A first step of storing the second image data at predetermined intervals, a second step of inputting a specific key signal to display the second image data stored in the first step, and in response to the specific key signal, the second image data Stops the operation of compressing and storing the image data at the second compression ratio, compressing the first image data supplied from the image signal source at the first compression ratio, and storing the compressed first image data; and the compressed first image. The data and the plurality of second image data stored in the first step are mixed to form one screen including the first image data as the main image and the plurality of second image data as the auxiliary images. A fourth step of sum and display.

Another object of the present invention is to provide a video device for displaying a main image and an auxiliary image on the screen, the key input means for generating a key signal for displaying the auxiliary image, and the first image data supplied from the image signal source as it is The main image processing unit and the main image processing unit for storing and outputting, compressing and storing the image by one screen when the key signal is generated, and outputting the first image data according to the first read address corresponding to the area to be displayed on the screen. Compress and store the second image data corresponding to the image in the horizontal direction and the vertical direction at regular intervals, stop the compression when the key signal is generated, and store the second image data according to the second read address corresponding to the area to be displayed on the screen. An auxiliary image processor for outputting second image data and an oscillator for generating a predetermined clock to generate a vertical synchronization signal and a horizontal synchronization signal The key is supplied with a vertical / horizontal synchronous signal generator and a vertical synchronous signal and a horizontal synchronous signal generated by the vertical / horizontal synchronous signal generator, and reads the first image data and the second image data. A read address generation unit for outputting two read addresses to the main image processing unit and the sub image processing unit, and first and second aspect ratio control for compressing the first image data and the second image data at a corresponding compression ratio in response to a key signal; A control unit for outputting a signal, and outputting a read control signal for reading the first image data and the second image data corresponding to one screen to the read address generator to control the main image and the auxiliary image to be displayed at a preset aspect ratio. To mix the first image data outputted by the main image processing unit and the second image data outputted by the auxiliary image processing unit on one screen as a main screen and an auxiliary image It includes parts of mixture.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a video device having a playback function according to the present invention. As shown in the drawing, the present invention receives a main image processor 10 for compressing and storing an image supplied from an image signal source (not shown) such as a broadcasting station, a video tape recorder (VTR), and one end of the image at predetermined intervals. Compressing and storing the secondary image processing unit 30, the main image processing unit 10 and the auxiliary image processing unit 30, the mixing unit 40 and the mixture to mix the main image and the auxiliary image compressed by the unit of the screen, respectively In response to the received key signal, the microcomputer 50 for controlling the overall operation for displaying the auxiliary image and the main image on the screen at the same time. The present invention also provides a vertical / horizontal synchronous signal generator 20 for generating a vertical synchronous signal and a horizontal synchronous signal having an oscillator, and for reading the main image and the auxiliary image stored according to the vertical synchronous signal and the horizontal synchronous signal. A read address generator 25 for generating a read address is provided.

Specifically, the main image processing unit 10 compresses the A / D converter 11 for digitally converting the input image and the digitally converted image data in units of one screen according to the first aspect ratio control signal supplied from the microcomputer 50. A PLL 14 that receives a vertical / horizontal compression converter 12 and a horizontal synchronization signal added to the input image to generate a synchronization clock, and a first write address for designating an area in which image data is to be stored in accordance with the synchronization clock. From the first MUX 16 and the first MUX 16 which selectively supply the first write address generation section 15 and the first read address from the first write address or the address generation section 20 to be described later. And a first memory 13 which stores the compressed image data according to the supplied first write address or outputs the stored image data according to the first read address. In addition, the auxiliary image processing unit 30 has a configuration similar to that of the components of the main image processing unit 10, and receives a horizontal synchronization signal added to the input image and generates a synchronization clock PLL (31); A second write address generator 32 for generating a second write address for designating a region in which image data is to be stored in accordance with the synchronous clock, and an A / D converter 33 for digitally converting one end of an input image. The vertical / horizontal compression converter 34 compressing the converted image data in units of one screen according to the second aspect ratio control signal supplied from the microcomputer 50 at regular intervals, and the second write address or read address generator 25. A second MUX 35 selectively supplying a second read address from < RTI ID = 0.0 >) < / RTI > and a second memory 36 storing compressed video data according to the second write address or outputting the second read address according to the second read address. The lure is.

The mixing unit 40 is connected to the main image processing unit 10 and the sub image processing unit 30, and the mixing unit 40 mixes the image data for the main image and the image data for the sub image. ) And a D / A converter 42 for analog-converting the mixed video data into a video signal.

The operation of the video device having the playback function of the present invention configured as described above will be described with reference to FIGS. 1 and 2.

When the playback function is not set, the microcomputer 50 outputs a first aspect ratio control signal corresponding to the vertical / horizontal compression converter 12 to store the image data of the main image in an uncompressed state. The vertical / horizontal compression converter 12 outputs the input image data to the first memory 13 one by one in a state in which it is not compressed. The first memory 13 stores image data in a memory area designated by the first write address supplied from the first MUX 16, and also reads out the read address generated by the read address generator 25 during screen output. It is supplied through 1MUX (16) and outputs video data one by one. The first memory 13 repeatedly stores and continuously stores one screen for each screen. In relation to the operation of storing and outputting, the auxiliary image is sequentially stored at regular intervals. The A / D converter 33 receives one end of the input image and digitally converts it. The vertical / horizontal compression converter 34 receives the second aspect ratio control signal of the microcomputer 50 and receives image data supplied from the A / D converter 33 by 3/4 in the horizontal direction and 2/3 in the vertical direction. It is compressed and output to the second memory 36. The second memory 36 stores image data compressed in the horizontal / vertical direction in a memory area designated by the second write address supplied through the second MUX 35. The second memory 36 has a memory area capable of storing image data corresponding to six screens, and sequentially stores the compressed image data in screen units at predetermined intervals in the memory area. The second memory 36 stores the image data of the new sub-image instead of the image data of the first sub-image stored after the image data to be stored at a predetermined interval reaches the set number of storage for 6 screens. . Accordingly, the mixer 40 receives only the image data of the main image from the first memory 13 and converts the image data into the image signal. Thereafter, the image signal is displayed on the screen as shown in FIG. 2 (a) through the image processing circuit.

On the other hand, as shown in FIG. 2 (a), when a scene to be viewed again occurs while the image is displayed on the screen, and the user selects a specific key, the microcomputer 50 receives a key signal corresponding to the specific key. Thereafter, the microcomputer 50 outputs the first aspect ratio control signal to the vertical / horizontal compression converter 12 to compress the main image currently displayed on the screen by 1/2 in the horizontal direction. At the same time, the microcomputer 50 outputs a second aspect ratio control signal to the vertical / horizontal compression converter 34 to stop the operation of compressing the image data of the auxiliary image at regular intervals. Accordingly, the vertical / horizontal compression converter 12 compresses the image data of the main image by 1/2 in the horizontal direction and outputs the compressed data to the first memory 13, and the first memory 13 is 1 / in the horizontal direction. Video data compressed by 2 is stored in the corresponding memory area. Meanwhile, the vertical / horizontal compression converter 34 stops compressing the image data of the auxiliary image in the vertical direction and the horizontal direction at regular intervals by the second aspect ratio control signal. Therefore, the second memory 36 stores the image data of the sub-image for 6 screens until the user selects a specific key. Thereafter, the microcomputer 50 outputs a predetermined read control signal to the read address generator 25 to output the main image and the sub image. The read address generator 25 outputs the read addresses to the first MUX 16 and the second MUX 35 based on the vertical synchronous signal and the horizontal synchronous signal supplied from the vertical / horizontal synchronous signal generator 20. The first memory 13 outputs image data of the main image compressed by 1/2 in the horizontal direction to the third MUX 41 of the mixing unit 40 according to the read address supplied through the eleventh MUX 16. The second memory 36 outputs the image data of the six auxiliary images, which are compressed and stored at predetermined intervals, to the third MUX 41. Subsequently, the third MUX 41 receives the image data of the main image and the image data of the auxiliary image, respectively, and forms them in one screen unit, and outputs them to the D / A converter 42 at the rear stage. The D / A converter 42 converts video data formed in units of screens into video signals. Thereafter, the mixed video signal is simultaneously displayed on one screen as shown in FIG. 2B through the image processing circuit.

In FIG. 2 (b), the main image is displayed as a moving image on the left side of the screen in half compressed state, and the auxiliary images stored at regular intervals correspond to the first sub-screen S1 to the sixth sub-screen S6. Displayed as a still picture at the position.

In the exemplary embodiment, the main image compressed in the horizontal direction and the six auxiliary images compressed in the horizontal and vertical directions are displayed, but the number of the auxiliary images may be changed under the control of the microcomputer 50. At this time, the microcomputer 50 sets the compression ratio of the main image adaptively to the number of auxiliary images.

As described above, the present invention can be easily applied to a TV receiver having a double screen function, a PIP function, a POP function, a multi-PIP function, and the like.

As described above, the present invention not only eliminates the trouble of recording a specific scene using a recording / playback apparatus, etc., but also has an effect of reproducing scenes to be immediately viewed again through a simple operation.

Claims (10)

A method for displaying a main image and an auxiliary image together on a screen, the method comprising: displaying and storing first image data supplied from an image signal source as it is, and compressing second image data obtained by compressing the first image data at a second compression ratio. A first step of storing at a predetermined interval, and a second step of inputting a specific key signal to display the second image data stored in the first step; In response to the specific key signal, the operation of compressing and storing the second image data at the second compression ratio is stopped, and the first image data compressed by compressing the first image data supplied from the image signal source at the first compression ratio. Storing a third step; And a single screen comprising the compressed first image data and the plurality of second image data stored in the first step as the main image, and the plurality of second image data as the auxiliary images. And a fourth step of mixing and displaying the display device. The method of claim 1, wherein the first step stores second image data at predetermined intervals until a preset number of storages is reached. The display apparatus of claim 2, wherein after the set number of storages is reached, second video data that is currently input is stored instead of the second video data stored first. Way. The method of claim 1, wherein the fourth step includes mixing the main image and the sub image so that the main image and the sub image are displayed on the screen in response to the storage order of the first image data. The playback function of claim 1, wherein the first compression ratio represents a compression ratio in a horizontal direction and a vertical direction with respect to the main image, and can be variably set according to the number of auxiliary images displayed on the screen. Display method of an image device having a. The playback function of claim 1, wherein the first compression ratio indicates a compression ratio in a horizontal direction and a vertical direction with respect to the auxiliary image, and can be set variably according to the number of auxiliary images displayed on the screen. Display method of an image device having a. The method of claim 1, wherein the auxiliary images displayed on the screen are still images. An image apparatus for displaying a main image and an auxiliary image together on a screen, comprising: key input means for generating a key signal for displaying the auxiliary image; Storing and outputting the first image data supplied from the image signal source as it is, compressing and storing the first image data by one screen when the key signal is generated, and outputting the first image data according to the first read address corresponding to the area to be displayed on the screen. Main image processing unit; The second image data corresponding to one screen of the first image data is sequentially compressed and stored in a horizontal direction and a vertical direction at predetermined intervals, the compression is stopped when the key signal is generated, and the image is displayed on an area to be displayed on the screen. An auxiliary image processor to output pre-stored second image data according to a corresponding second read address; A vertical / horizontal synchronous signal generator for generating a vertical synchronous signal and a horizontal synchronous signal with an oscillator for generating a predetermined clock; Receiving the vertical synchronization signal and the horizontal synchronization signal generated by the vertical / horizontal synchronization signal generator, and assisting the main image processing unit with first and second read addresses for reading first image data and second image data. Read address generation unit for outputting to the image processing unit, respectively; In response to the key signal, first and second aspect ratio control signals for compressing the first image data and the second image data at a corresponding compression ratio, respectively, and output the first image data and the second image corresponding to one screen; A control unit which outputs a read control signal for reading image data to the read address generator so that the main image and the sub image are displayed at a preset aspect ratio; And a mixing unit configured to mix the first image data output by the main image processor and the second image data output by the sub image processor to output the main image and the sub image on one screen. . The apparatus of claim 8, wherein the mixing unit comprises a MUX for mixing the main image and the auxiliary image and a D / A converter for analog converting the mixed image mixed by the MUX. 10. The apparatus of claim 8, wherein the main image processing unit and the sub image processing unit convert an image supplied from an image signal source into an A / D converter and the image data digitally converted by the A / D converter in a vertical direction and a horizontal direction. A vertical / horizontal compression converter for compressing the sine, a memory for storing image data compressed by the vertical / horizontal compression converter, a PLL for generating a synchronous clock in accordance with a horizontal synchronization signal added to the image, and the synchronization. And a write address generator for generating a write address for designating a storage area of the video data by receiving a clock.