KR19990032890A - Recording method of video signal on TV - Google Patents

Abstract

The present invention allows a video signal range to be stored to be distinguished from each other according to the type of broadcast program received by a television having a device for recording a television video signal one frame at a time, and recording a video signal having the storage range as part of one frame. A method comprising: an A / D converter (11) for video; A memory 12; A system control unit 14; An image data memory 16; In a video signal recording method in a television having a key input unit,

A first step of storing, by the type of program, the information on the position of the video portion to be recorded by the television producer on the screen of one frame for each program type; A second step of checking, by the system controller 14, a type of a program to be broadcasted at the time when the viewer designates a recording mode through the key input unit; By accessing the recording position information corresponding to the program type identified in the second step, only the data at the corresponding address of the field memory 12 is output from the field memory to the image memory 16, and at the same time, the recording is performed. (W) a third process of outputting a control signal to the image memory.

Description

Recording method of video signal on TV

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording broadcast signals in television, and more particularly, to recording television signals in which the storage range of the video signals is divided according to the type of programs broadcast on a television equipped with a device for recording television video signals. It is about a method.

Korean Patent Application Publication No. 96-28378 is a prior application technology related to a television capable of recording and reproducing video and audio signals of a television on its own. 1 shows a television system for recording / reproducing video signals in the prior art.

The prior art television includes: an A / D converter (11) for converting an analog broadcast signal into a digital signal; A memory 16 capable of storing video (or audio) signals; A key input section for inputting a recording key signal for selecting a recording function and a playback key signal for selecting a playback function; A system control unit 14; A compression / extension unit 13 for compressing, recording, extending, and restoring a video signal; An address generator (15) which is cleared at a defined fixed period of time and generates an address signal necessary for writing and reading signals; It is comprised including the predetermined switch SW.

The system control unit 14 sets the memory mode of the write cycle state when the recording key signal of the key input unit is input to make the memory write-enabled, and sets the memory mode of the read cycle state when the playback key signal is input. To make the memory read-enabled. That is, the address generator clears the address generator at a predetermined time so that video / audio data can be read and written at a predetermined time period.

The switch SW has a first contact point and a second contact point for receiving input image data and image data read out from the memory 16, respectively, and put the two contact points in a setting mode of the system controller 14. Optionally switch accordingly. That is, the system controller connects with the first contact during the write cycle to output the original image data, and connects with the second contact during the read cycle to output the image data input from the compression / extension unit 13.

However, a television storing image data having the above configuration has a problem in that a lot of memory is required because all the images inputted during the write enable state are stored. That is, the television stores the entire frame, whereas the portion of the image that the viewer wants to store is limited according to the type of program. In the case of the shopping channel, there is a problem in that the memory is wasted when the viewer wants to store only the portion representing the merchandise image and the score relationship and the ball count portion in baseball broadcasting.

Prior application technology related to recording only a portion according to the program is Korean Patent Publication No. 97-50148. This allows the transmission data to be detected from the transmission data detection means, and causes the detected transmission data and text data to be displayed on the screen when the partial reservation recording for each program section is executed by the function setting means so that a part of the program is designated. And control means for controlling the partial reservation recording function according to whether or not code data according to the designated section is detected by the transmission data detecting means.

However, recording a portion of a program, i.e., only a specific section may reduce memory as compared to recording the whole, but there is still a problem in that image data that does not need to be stored among images of one frame is also stored.

According to the present invention for solving the above problems, the range of the video signal stored in accordance with the type of the broadcast program received in the television having a device for recording the video signal of the TV frame by frame to each other, and the storage range It is an object of the present invention to provide a method for recording a video signal which is part of one frame.

1 is a view showing a video signal recording system in a conventional television.

2 is a view showing an embodiment of a system for a video signal recording method of the present invention.

Explanation of symbols on the main parts of the drawings

11: A / D Converter 12: Field Memory

13 data compression / extension 14 system control

15: address generator 16: image memory

Features of the present invention for achieving the above object, with reference to Figure 2, A / D converter 11 for converting an analog broadcast signal into a digital signal; A field memory 12 for temporarily storing image data of one field amount to be output to the water pipe; A system controller 14 for controlling various operations and outputting addressing and clock signals for controlling data input and output of the field memory; An image memory 16; A video signal recording method in a television having a key input unit (not shown) which is a means for a viewer to input an operation mode,

A first step of the television producer storing predetermined information on the position of an image portion to be recorded on a screen of one frame in a predetermined memory of the system controller 14 for each program type; A second step of checking, by the system controller 14, a type of a program to be broadcasted at the time when the viewer designates a recording mode through the key input unit; By accessing the recording position information corresponding to the program type identified in the second step, only the data at the corresponding address of the field memory 12 is output from the field memory to the image memory 16, and at the same time, the recording is performed. (W) a third process of outputting a control signal to the video memory.

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

2 is a diagram showing an embodiment of a system for a video signal recording method of the present invention, comprising: a system control unit 14 for controlling overall operations; An image memory 16 for storing image data; A / D converter 11 and field memory 12 are shown for converting a broadcast video signal into a digital signal for storage.

In addition, when the viewer does not want to store the broadcasted video, a video signal from an image processor (not shown) is directly connected to an input terminal of the A / D converter 11 in order to output the video signal directly to the water pipe (not shown). There is a switch section S / W having two contacts and a first contact connected to the input of the water pipe. Only one of the contacts is connected to the image processor by the control signal of the system controller 14.

In addition, the illustrated compression / extension unit 13 is for recompressing a part of the image data output from the field memory 12 and storing the image data in the image memory 16 or vice versa. The effect is to save memory capacity. The address generator 15 under the control of the system controller 14 designates the specific address in order to output only data of a specific address range of the field memory 12 to the image memory 16. do.

In the present invention, the A / D converter 11 can digitize and store a broadcast video signal only by using a video having a sampling rate of 15 M㎐ or more.

In the present invention, the system control unit 14 has a predetermined storage area for storing a self-executed program and necessary data, and the storage area includes an image of interest to be stored in a video frame of one frame at the time of TV production. Information about the location of the display should be stored.

That is, in the case of the home shopping channel, for example, the shopping item is displayed only on the left side of the screen of the receiving center (it may be different depending on the production production of the home shopping program, but it is assumed to be unified once). Thus, location information, which means only the left range of the video screen, is stored in the storage area of the controller 14 in association with (accessible) the identification number of the corresponding channel (or program).

Hereinafter, an embodiment of the operation relationship of the video signal recording system as described above will be described.

When the viewer only watches the broadcast channel, the switch section S / W has its input connected to its first contact (under the control of the controller), so that the video signal through the tuner and the image processor It will be delivered to the receiving hall immediately.

When a viewer watches a channel such as home shopping or baseball relay and wants to store only a specific video portion, the viewer inputs a recording mode signal REC to the controller 14 using the key input unit. Then, the control unit outputs a predetermined control signal to change the contact state of the switch unit so that the video signal from the image processor is input to the field memory 12 via the A / D converter 11.

In addition, the system control unit 14 checks the type of the current channel or broadcast program, accesses the storage location information corresponding to the checked type, and generates an address of the field memory corresponding to the location information. The address generator 15 is controlled. When the address generator outputs an addressing signal from the address generator to the field memory 12 according to a clock CLK signal and a control signal of the controller, only the image data temporarily stored at the address is used to decompress the compression / extension unit 13. After that, the image memory 16 is stored in the image memory 16. At this time, the controller 14 also outputs a write enable (W) signal to the image memory.

When the viewer wants to view the stored partial image through the above process again, a PLAY signal is transmitted from the key input unit to the system controller 14. Then, the controller outputs a read enable signal R to the image memory 16 so that the image data stored in the field memory 12 is transferred from the image memory. The field memory has a shift register. When the output of the shift register is synchronized with the horizontal synchronizing signal, the image is displayed in the receiving tube according to the image data to be stored.

The present invention operating as described above records only the video area that the viewer wants to store, so that the viewer's satisfaction is equally realized while consuming less memory.

Claims (2)

An A / D converter 11 for converting an analog broadcast signal into a digital signal; A field memory 12 for temporarily storing image data of one field amount to be output to the water pipe; A system controller 14 for controlling various operations and outputting addressing and clock signals for controlling data input and output of the field memory; An image data memory 16; A video signal recording method in a television having a key input unit which is a means for a viewer to input an operation mode, A first step of the television producer storing information on the position of an image portion to be recorded on a screen of one frame for each program type in a predetermined memory of the system controller 14; A second step of checking, by the system controller 14, a type of a program to be broadcasted at the time when the viewer designates a recording mode through the key input unit; By accessing the recording position information corresponding to the program type identified in the second step, only the data at the corresponding address of the field memory 12 is output from the field memory to the image memory 16, and at the same time, the recording is performed. And (W) a third process of outputting a control signal to the video memory. The system controller 14 of claim 1, wherein when the viewer wants to output the data stored in the image memory 16 by the third process through the key input unit, the system controller 14 is configured to display the storage area corresponding to the key input signal. And outputting a control signal to output data to the field memory (12).