KR100195536B1 - Horizontal frequency and aspect ratio transformation detection apparatus and its method of tv - Google Patents

Abstract

The present invention relates to an apparatus for detecting horizontal frequency and aspect ratio conversion in a TV receiver, and a method thereof, which is adapted to call data for digital convergence adjustment in a TV receiver having a high resolution.

The present invention receives the key input signal from the keyboard unit 5 and the horizontal frequency high resolution signal from the synchronization signal generator 3, and outputs a data signal to the subsequent conversion data processing and D / A converter 2 A data storage and conversion detection unit 1 and a data signal received from the data storage and conversion detection unit 1 process convergence data unique to each mode and simultaneously convert a digital signal into an analog signal. Convergence which receives the output signal from the data processing and D / A converter 2 and the convergence data processing and D / A converter 2 and outputs data for digital convergence adjustment. It is comprised with the data output part 4, and can be employ | adopted for the video device which has a high resolution.

Description

Horizontal Frequency and Aspect Ratio Conversion Detection Device and Method in TV Receiver

1 is a block diagram of an apparatus of the present invention.

Figure 2 is a detailed block diagram of the data storage and conversion detection unit in the present invention.

3 is a flow chart of a main routine for explaining the operation of the method of the present invention.

4 is a flow chart of the first interrupt routine of FIG.

5 is a flow chart of the second interrupt routine of FIG.

* Explanation of symbols for main parts of the drawings

1: Data storage and conversion detection unit 2: Convergence data processing and D / A conversion unit

3: sync signal generator 4 convergence data output unit

5: key board part 10: central processing unit

11: E ² PROM 12: SRAM

13,14: D flip flop 15: J-K flip flop

The present invention relates to an apparatus for detecting horizontal frequency and aspect ratio conversion in a TV receiver and a method thereof, and more particularly, to be suitable for data call for digital convergence adjustment in a TV receiver having a high resolution.

In conventional TV receivers, since there is no device for detecting a horizontal frequency and aspect ratio conversion state, there is a lack of compatibility between video devices and a convergence corresponding to each mode in digital convergence adjustment of a projection TV receiver. There was a problem that convergence adjustment was not easy because adjustment data could not be called automatically.

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and includes a data storage and conversion detection device, a convergence data processing and a D / A conversion unit for detecting a data storage and conversion state in response to an input of a keyboard unit and a synchronization signal generator. It is equipped with a convergence data output unit so that horizontal frequency and aspect ratio conversion can be detected automatically, so that it can be displayed with compatibility even when inputting signals from existing video equipment and future high resolution TV receivers. It is an object of the present invention to automatically call the digital convergence adjustment data so that the convergence adjustment can be performed more easily. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The apparatus of the present invention is a horizontal frequency high resolution (H / E) signal and aspect ratio (W) input from the key input signal inputted from the keyboard unit 5 and the synchronization signal generator 3 as shown in FIGS. Data storage and conversion detection unit 1 which receives a / N) signal and outputs a data signal to a subsequent convergence data processing and D / A conversion unit 2, and data from the data storage and conversion detection unit 1 Convergence data processing and D / A conversion unit 2 for receiving a signal and processing unique convergence data for each mode, and converting a digital signal into an analog signal, and the convergence data processing and D / A convergence data output section 4 for receiving the output signal from the A converter section 2 and outputting data for digital convergence adjustment is provided.

In addition, the data and the storage and conversion detection report 1 reads the central processing unit 10 for controlling the operation of the entire apparatus and the digital convergence data corresponding to each mode of the central processing unit 10. 2 bit conversion detection generated from the E ² PROM 11, the SRAM 12 which redistributes the digital convergence data corresponding to each mode and the CPU 10, and the CPU 10; The de-flip-flop 13 which receives the signals H / E and W / N and outputs a signal for informing the mode state to the convergence data processing and D / A converter 2 and the synchronization signal generator 3. And a flip-flop 14 for receiving the aspect ratio signal output from the synchronization signal generator 3 and applying it to the central processing unit 10, and receiving the high resolution signal from the synchronization signal generator 3 for central processing. The apparatus 100 is equipped with the JK flip-flop 15 which outputs the signal which increased 8 times in timing.

In addition, the method of the present invention includes a first step of decrypting the data value in the central processing unit 10 with the device initially reset as shown in FIGS. 3 to 5, and if the data value is decrypted, the first step. A second step of receiving an interrupt request and transmitting data; and a third step of determining whether or not a key interrupt is detected after decoding the key signal input from the keyboard unit 5 upon receiving the second interrupt request again when the data transmission is completed. And if it is determined that the key interrupt is not detected, the method returns to the third step to perform key decoding again, and if the key interrupt is detected, the fourth step of performing the corresponding key function loop.

Further, in the second step, the first interrupt routine sets the setting register to FFH to notify the key interrupt input, and stores the key data value in the push register when an external interrupt of the keyboard unit 5 is input. If the key data value is stored in the push register, decrypting the stored key data value and storing the key data value in the designated register; and if the decrypted key data value is stored in the designated register, the key data stored in the designated register is stored as a pop register. After decoding, the third process is to perform the main loop.

Further, in the third step, the second interrupt routine stores the data in the push register, masks off the conversion detection signal (2 bits) to the designated register, and detects whether the horizontal frequency is searched, and the detection result. When the horizontal frequency high resolution signal [H / E (High Definition / Extender Definition)] is 0, set the aspect ratio signal [W / N (Wide / Narrow)] to 0, and set the conversion detection signal (2 bits) to the setting position of the designated register. The second process of detecting whether there is no change compared to the previous two-bit signal, the conversion detection signal (2 bits) set to the set position of the detection result designation register and the flag bit = 0 converted if the current two-bit signal does not change. After returning, if there is a change, the third process of changing the flag bit = 1 and returning, and if the horizontal frequency detection result of the horizontal frequency is H / E = 1 in the first process after decoding the aspect ratio (W / N) value Whether W / N = 0 or W / N = 1 In the fourth process of detecting, and if the detection result W / N = 0, H / E = 1, and after converting the conversion detection signal (2 bits) in the second process to the setting position of the designated register, A fifth process of detecting a change, and if the detection result of the fourth process is W / N = 1, H / E = 1, and then converts the conversion detection signal of the second process into a setting position of a designated register, The sixth step is to detect a change compared to the previous two-bit signal.

Referring to the effects of the present invention made as described above are as follows.

First, the horizontal frequency 33.75KHZ / 31.5KHZ high resolution signal a outputted from the synchronization signal generator 3 is applied to the JK flip-flop 15 so that the signal b, which is eight times toggled in timing, is the central processing unit ( An aspect ratio [W / N (16: 9/4: 3)] signal applied to 10) and indicating a 'low' or 'high' state in accordance with the switching of the number position SW in the synchronization signal generator 3; ) Is applied to the central processing unit 10 through the de-flip flop 14, the central processing unit 10 receives the signal output through the JK flip-flop 15 and the de- flip-flop 14 Program of 2 bits (H / E, W / N) is outputted to the convergence data processing and D / A converter (2) through the deflip flip (13). Each mode, namely (1), indicating the mode of status. 33.75KHZ / 16: 9 (HD), (2). 31.5KHZ / 16: 9 (US HD), (3). Read digital convergence data (each unique convergence data for each mode) corresponding to 31.5KHZ / 4: 3 (formerly double-scan NTSC method) from E ² PROM (11), and write to SRAM (12) The contents (e) for the adjustment of convergence are converted into the convergence data processing and D / A conversion unit (2) by the contents (f) from the convergence data processing and D / A conversion unit (2). ) Is added.

The detection of the horizontal frequency high resolution (H / E) and aspect ratio (W / N) in the central processing unit 10 is performed by the main routine as shown in FIG.

That is, in the initial reset state, the CPU 10 decodes the data value and when the external interrupt input is enabled by the keyboard unit 5, the first interrupt as shown in FIG. After receiving the first interrupt as shown in FIG. 5, the data is transmitted, and after receiving the second interrupt as shown in FIG. 5, the key signal is decoded to determine whether a key interrupt is detected. If the signal is not detected, the key signal decoding process is performed again. If the signal is detected, the corresponding key function loop is performed.

Therefore, the signal d ₁ , which is displayed by the 2-bit conversion detection signal d output from the central processing unit 10 via the de-flip-flop 13, is synchronized with the convergence data processing and the D / A converter 2. It is output to the signal generator 3 to inform the mode state.

In addition, as described above, the horizontal frequency high resolution signal (H / E) (a) from the synchronization signal generator 3 is input to the JK flip-flop 15 so that the signal b increased 8 times in timing is centered. When input to the external second interrupt terminal (not shown) of the processing device 10, the central processing unit 10 detects the horizontal frequency of 33.75KHZ / 31.5KHZ using the time function, and the aspect ratio (W / N Signal is applied to the de-flip flop 14 according to the switching of the switch SW in the synchronization signal generator 3, the de-flop 14 is moved from the central processing unit 10. Each time the output clock enable signal (a) is input, it is inputted to the central processing unit 10 and its state is read, and then the horizontal frequency and aspect ratio detection output 2-bit (H / E, W / N) signal (d) is de-flipped. Through (13), automatic detection indicating three modes of (00, 10, 11) is executed.

Here, the signal d ₁ represents an H / E signal.

As described above, according to the present invention, since the horizontal frequency and aspect ratio conversion is automatically detected by the TV receiver, the display can be displayed with compatibility even when a signal is input from a high resolution TV receiver in the future, and the digital convergence of the projection TV receiver In the adjustment, the convergence adjustment data for each mode can be called automatically, so that the adjustment of the convergence can be made easier.

Claims (5)

Convergence data processing at the next stage by receiving the key input signal input from the keyboard unit 5 and the horizontal frequency high resolution (H / E) signal and the aspect ratio (W / N) signal input from the synchronization signal generator 3 And a data storage and conversion detection unit 1 for outputting a data signal to the D / A conversion unit 2, and a data signal from the data storage and conversion detection unit 1 to receive unique convergence data for each mode. A convergence data processing and D / A converter 2 for converting an analog signal into a digital signal while receiving the output signal from the convergence data processing and D / A converter 2 A horizontal frequency and aspect ratio conversion detection device in a TV receiver comprising a convergence data output unit (4) for outputting data necessary for digital convergence adjustment. The data storage and conversion detector 1 of claim 1, further comprising: a central processing unit 10 for controlling the operation of the entire apparatus, and digital convergence data corresponding to each mode of the central processing unit 10; E ² PROM 11 to be read out, SRAM 12 to record digital convergence data corresponding to each mode of the CPU 10, and 2 bits generated from the CPU 10 De-Flop flop that receives the conversion detection signal (H / E, W / N) and outputs a signal for informing the mode state to the convergence data processing and D / A converter 2 and the synchronization signal generator 3 (13), the de-flip flop 14 which receives the aspect ratio signal output from the synchronization signal generator 3 and applies it to the CPU 10, and receives the high resolution signal from the synchronization signal generator 3; JK flip-flop 15 for outputting a signal 8 times increased in timing to the central processing unit (10) Horizontal frequency aspect ratio conversion detection device in a TV receiver. In a state where the device is initially reset, the CPU 10 decodes a data value, and if the data value is decoded, a second step of receiving a first interrupt and transmitting data; In response to the request for the second interrupt, the third step of decoding the key signal input from the keyboard unit 5 and determining whether a key interrupt is detected, and if the key interrupt is not detected as a result of the determination, proceed to the third step. Returning to perform key decoding again, and if a key interrupt is detected, performing a corresponding key function loop. 4. The method of claim 3, wherein in the second step, the first interrupt routine sets the setting register to FFH to notify the key interrupt input and stores the key data value in the push register when an external interrupt of the keyboard unit 5 is input. A first step; and a second step of decoding the stored key data value if the key data value is stored in the push register and storing the stored key data value in the designated register; and a key stored in the designated register as the pop register if the decrypted key data value is stored in the designated register. A horizontal frequency and aspect ratio conversion detection method of a TV receiver comprising a third process of performing a main loop after decoding data. 4. The method of claim 3, wherein in the third step, the second interrupt routine stores a data in a push register, masks off a conversion detection signal (2 bits) into a designated register, and detects whether a horizontal frequency is searched. If the horizontal frequency high resolution signal [H / E (High Definition / Extender Definition)] is 0, the aspect ratio signal [W / N (Wide / Narrow)] is set to 0 and the conversion detection signal (2 bits) is set in the designated register. A second process of detecting whether there is no change compared to the previous two-bit signal after changing to a position; Returning after converting = 0 and changing and returning flag bit = 1 if there is a change; and if the horizontal frequency is H / E = 1 in the first process, the aspect ratio (W / N) value Then decode W / N = 0 or W / N = 1 4th step of detecting whether or not, and if the detection result W / E = 0, H / E = 1, and then converts the conversion detection signal (2 bits) during the second process to the setting position of the designated register, A fifth process of detecting a change in comparison with the control unit; and if the detection result of the fourth process is W / N = 1, H / E = 1, and then converting the conversion detection signal during the second process to a setting position of a designated register, A horizontal frequency and aspect ratio conversion detection method of a TV receiver comprising a sixth step of detecting a change in comparison with a previous two-bit signal as in the step.