KR920005173B1 - Video and sound control method by memory and reproductive way of the same estimated - Google Patents

Abstract

An inputted key is checked to find whether it is related to images and sounds. If it is, a checking finds whether the inputted key is an AV (audio and video) memory mode key. If it is, the images and sounds are controlled by fetching the control data from a memory. If it is not an AV memory mode key but a video/audio mode key, the set video/audio control mode is displayed on the screen, and then, the next video/audio control mode is displayed on the screen upon receipt of a video/audio mode key within a first setting period. Then the inputted key is checked to find whether it is an increment or decrement key to take a proper action. With the method, the video and audio control data do not have to be adjusted each time.

Description

Video and audio control method by storing and reproducing video and audio control values of TV

1 is a block diagram to which the present invention is applied.

2 is a flow chart in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

10: key input unit 20: EEPRON

30: micom 40: low pass filter

50: image controller 60: voice controller

70: OSD block

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video and audio control method of a television, and in particular, to a predetermined video and audio control value in a television having a micro-computer in which a PWM (Pulse Width Modulation) port is incorporated. The present invention relates to a method of controlling a video and audio by storing it in a memory and reproducing it when necessary.

Currently, televisions allow users to watch the desired video and audio by controlling the video and audio. At this time, the control mode of the image includes contrast, sharpness, brightness, tint, and color, and the control modes of audio include balance and bass. Bass) and Treble.

The control circuits in the video or audio mode described above are controlled by direct current control. Therefore, early televisions controlled the above video or audio mode by using a variable resistor.

Afterwards, the microcomputer built-in PWM port allows direct control of direct current by microcomputer, and video and audio mode can be controlled by remote control. However, as described above, the control of video and audio performed by a microcomputer with a built-in PWM port by remote control is performed according to the screen state and sound type of a movie program, a music program, etc., in order to watch a desired video and audio. There was an inconvenience to adjust the control value of each video and audio mode each time.

Accordingly, an object of the present invention is to store a predetermined video and audio mode control value according to a screen state or sound type in a predetermined memory in a television having a microcomputer with a built-in PWM port, and play back a desired video and audio when necessary. It is to provide a video and audio control method that can correct.

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

1 is a block diagram to which the present invention is applied, and includes a key input unit including a plurality of keys (video mode key, voice mode key, increase key, decrease key, predetermined number of AV memory mode keys) for controlling video and audio. (10), an EEPROM (Electrically Erasable Programmable ROM) 20 capable of writing or reading video and audio mode control values of a predetermined number of AV (Audio-Video) memory modes, and key input of the key input 10. By a plurality of PWM ports (PWM0-PWMn) by the video and audio mode control value to the EEPROM (20), the microcomputer 30 to output the OSD (On Screen Display) control signal, and the PWM port ( It is composed of a plurality of low-pass filters corresponding to PWM0-PWMn) to low-pass each video and audio mode control signal output to the PWM port (PWM0-PWMn) of the microcomputer 30 to output DC control values. The low pass filter 40 and the control value of the DC output from the low pass filter 40 An image controller 50 for inputting a control value of the video mode to control the video signal input to the audio signal input terminal 100 by the control value of the video mode and outputting the video signal to the output line 110; The voice signal inputted to the voice signal input terminal 200 by inputting a control value of the voice mode among the DC control values output from the low pass filter unit 40 is controlled by the voice mode control value to the output line 120. And a OSD block 70 for inputting an OSD control signal output from the microcomputer 30 to display a predetermined state on the screen.

2 is a flow chart according to the present invention, which is a first step of determining whether there is a key input and determining a video and audio related key when there is a key input, and if the key input is a video and audio related key in the first step, It determines whether it is a memory mode key, and when one of the predetermined number of AV memory mode keys is the AV memory mode key, video and audio are controlled by the video and audio mode control values of the corresponding AV memory mode stored in the predetermined memory. A second process of displaying the corresponding AV memory mode; and determining whether the key input is a video or audio mode key when the key input is not an AV memory mode key in the second process. When the video or audio control mode set in the video or audio control mode is displayed on the screen, and the video or audio mode key is input again within the first set time, the next video or sound is displayed. A third step of displaying the control mode on the screen; and whether the input key is increased or decreased when the key input input while the specific video or audio control mode is displayed on the screen is not the video or audio mode key in the third step. A fourth key for increasing or decreasing the control value of the specific video or audio control mode according to a key input, displaying the state on the screen, and setting a second preset time for writing to a predetermined memory according to the determined key. And a fifth step of performing a function of a normal key if the key input is not a video and audio key in the first step, and controlling the OSD status according to each key input and controlling the OSD status for a third set time. And a sixth process of controlling the first and third set times, and determining whether to write, and writing the changed image or audio mode control value to a predetermined memory. It consists of 7 steps.

An operation example of FIG. 2 according to the present invention will now be described in detail with reference to the block diagram of FIG. If the microcomputer 30 of FIG. 1 is reset in step (1) of FIG. 2, the microcomputer 30 proceeds to step (2) to determine whether there is a key input from the key input unit 10.

In step (2), there is a key input. In step (3), it is determined whether the key input is a video or audio key. In step (3), if it is a video or audio key, it proceeds to step (11) to determine whether the key input is an AV memory mode key. If the key input is the AV memory mode key of one of the predetermined number of AV memory mode keys in step (11), the process proceeds to step (12) to control all of the AV memory modes among the video and audio mode control values stored in the EEPROM 20. After reading the image and the mode control value in each mode buffer in the microcomputer 30, the process proceeds to step 13. In the step (13), the video and audio mode control signals according to the video and mode control values are outputted to the low pass filter 40 through the respective PWM ports (PWM0-PWMn). The low pass filter 40 is a low pass filter corresponding to the PWM ports PWM-PWMn, respectively, and outputs the video and audio mode control signals as DC control values. Therefore, the image controller 50 controls the image signal inputted to the image signal input terminal 100 by the control value of the image mode among the DC control values output from the low pass filter 40 to output to the output line 110. . The voice controller 60 controls the voice signal input to the voice signal input terminal 200 by the control value of the voice mode among the DC control values output from the low pass filter 40 and outputs the output signal to the output line 120. .

Therefore, the user divides different video and audio mode control values according to the broadcast program into a predetermined number of AV memory modes in advance and stores them in the EEPROM 20, and then inputs a specific AV memory mode key according to the broadcast program. It is possible to watch the video and audio controlled by the desired video and audio mode control values among the video and audio mode control values stored in " In step (13), the video and audio mode control signals corresponding to the video and audio mode control values are output.

In step (14), the OSD control signal is output to the OSD block 70 to display a specific AV memory mode designated by the user on the screen, thereby controlling which AV memory mode the current video and audio are controlled by. Allow the user to know and proceed to step (5). If the key input is not a video or audio key in step (3), the method proceeds to step (4) to perform a function of a normal key according to the key input and proceeds to step (5).

On the other hand, if the video or audio mode key is input while the video and audio mode is controlled by the video and audio mode control values of the AV memory mode, the process proceeds to step (11) as described above. do. Since the video or audio mode key is input, the process proceeds from step 11 to step 21 to determine whether the key input is a video or audio mode key.

Since the key input is a video or audio mode key in step (21), the flow proceeds to step (22) to change the mode value of the mode buffer to a corresponding video or audio control mode value and proceeds to step (23). That is, when the image mode key is input when the image control mode is set in the order of contrast, sharpness, luminance, color tone, color, etc., the contrast control mode value is stored in the mode buffer.

In addition, if the voice mode key is input when the voice control mode is set in the order of balance, bass, and treble, the balance control mode value is stored in the mode buffer.

In operation 23, the OSD control signal corresponding to the video or audio control mode value stored in the mode buffer is output to the OSD block 70 to display the video or audio control mode on the screen. do.

In step (24), the time is set, and the process proceeds to step (5). At this time, the time set in the step (24) is to set the start time of the video or audio control mode display, the video or audio control mode display time set in the design, that is, the video or audio control mode display state during the first set time. To maintain.

On the other hand, if the video or audio mode key is input again within the first predetermined time period during which the video or audio control mode is displayed, the process proceeds as described above to the next video or audio control mode state and the OSD display state accordingly. That is, if the previous state is the contrast control mode state, the sharpness control mode state is entered.

In addition, if the increase or decrease key is input within the first predetermined time period during which the video or audio control mode display state is maintained, the process proceeds to step 21 where the video or audio mode key is input. Since the increase or decrease key is input, the process proceeds from step (21) to step (31) to determine whether the key input is the increase or decrease key. Since the key input is the increase or decrease key in step (31), the flow advances to step 32 to determine the current control mode, loads a buffer corresponding to the determined control mode, and proceeds to step 33.

That is, when it is determined that the current control mode is in the sharpness control mode of one of the AV memory modes of the predetermined number of AV memory modes, a buffer corresponding to the sharpness control mode of the AV memory mode is loaded with the current control value. Then, in step (33), the control value stored in the buffer is changed at a predetermined time interval set according to the increase or decrease key input, and the value of the mode control signal output to the corresponding PWM port among the PWM ports (PWM0-PWMn) is converted ( Go to step 34). In step (34), the OSD control signal is output to the OSD block 70 to display on the screen that the control value increases or decreases according to the increase or decrease key.

In step (35), a time for writing the control value in the EEPROM 20, that is, a second setting time, is set, and the process proceeds to step (5). At this time, the second setting time set in the step (35) does not immediately write the control value changed by the increase or decrease key to the EEPROM 20, and the increase or decrease key is not input for a predetermined time set at design time. Set the time when there is no increment or decrement keystroke to write only the last changed control value when not.

On the other hand, in step (5), the OSD block 70 is controlled as an OSD control signal to control the OSD status according to each key input and write or delete a predetermined OSD display on the screen and proceed to step (6). That is, the OSD display is written according to each key input and is deleted when the OSD display time displayed on the screen exceeds the third set time.

In addition, in step (6), control the time according to each mode, and proceeds to step (7). At this time, in step (6), each time is controlled according to the first to third set times.

On the other hand, in step (7), it is determined whether the video and audio mode control values are to be written, and if not, looping to the step (2) to repeat the above-described process. If it is determined in step (7) that the video and audio mode control values are to be written, the process proceeds to step (8) to clear the flag and proceeds to step (9).

In step (9), the current mode is determined, and the changed value is written to the address of the EEPROM 20 corresponding to the determined mode, and looped to step (2) to repeat the above-described process.

Therefore, the video and audio mode control values desired by the user can be stored and reproduced when necessary, so that the video and audio can be controlled.

As described above, the present invention provides a broadcast program as a method of reproducing a predetermined video and audio mode control value according to a screen state or sound type in a predetermined memory in a television having a microcomputer with a built-in PWM port. Accordingly, there is an advantage that the desired video and audio can be viewed without creating control values of the video and audio modes each time.

Claims (1)

Key input unit with a plurality of keys (video mode key, voice mode key, increment key, decrease key, predetermined number of AV memory mode keys) for controlling video and audio, and video and audio mode in a predetermined number of AV memory modes In a video and audio control method of a television having a predetermined memory capable of writing or reading a control value and a microcomputer (30) with a built-in PWM port, it is determined whether or not there is a key input, and when there is a key input, A first process of determining whether a key is applied; and if the key input is a video and audio related key in the first process, it is determined whether the AV memory mode key is an AV memory mode key of a predetermined number of AV memory mode keys. Controlling the video and audio according to the video and audio mode control values of the corresponding AV memory mode stored in the AV memory mode and displaying the corresponding AV memory mode on the screen; If it is not the mode key, it is determined whether it is a video or audio mode key, and if it is a video or audio mode key, the video or audio control mode set among the predetermined number of video or audio control modes is displayed on the screen for the first set time, and the first set time. A third process of displaying a next video or audio control mode on the screen when a video or audio mode key input is input or input within the screen; and a key input while the specific video or audio control mode is displayed on the screen in the third process When the input is not the video or audio mode key, it is determined whether the increase or decrease key is used. If the increase or decrease key is used, the control value of the specific video or audio control mode is increased or decreased according to the key input and the state is displayed on the screen. A fourth step of setting a second set time for writing to a predetermined memory; and in the first step, the key input is not a video and audio related key. A fifth step of performing a function of a conventional key, a sixth step of controlling an OSD state according to each key input, maintaining an OSD state for a third set time, and controlling the first and third set times; And a seventh step of judging whether or not to write and writing the changed video or audio mode control value to a predetermined memory.

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