KR100472445B1 - Display apparatus and method for processing digital versatile disc signal prevented copy - Google Patents

Abstract

The present invention relates to an apparatus and method for reproducing an optical recording medium. More particularly, the present invention relates to a method of processing a copy-protected DVD signal such that a normal screen is displayed regardless of whether the optical recording medium title type is a copy guard disk or not. A display device and method are provided. A display apparatus for processing a copy-protected DVD signal is a video signal reproducing apparatus, comprising: sync separating means for separating a sync signal from the video signal, a value obtained by counting a horizontal sync signal among the separated sync signals for a predetermined time, and a reference value Signal processing means for processing a vertical blanking section of the video signal into an active region or an inactive region after determining whether to include a copy protection signal by comparing a signal with each other, and a vertical blanking section of the video signal processed into an active or inactive region by the signal processing means. And display means for processing and displaying the signal. According to the present invention, a consumer can watch a normal screen by differently applying a signal processing method when a copy protection signal is present and when there is no copy protection signal by counting H-Sync at the time of input of the optical recording medium.

Description

Display apparatus and method for processing a copy-protected DVD signal {verification method}

The present invention relates to an apparatus and method for reproducing an optical recording medium. More particularly, the present invention relates to a method of processing a copy-protected DVD signal such that a normal screen is displayed regardless of whether the optical recording medium title type is a copy guard disk or not. A display device and method are provided.

In order to prevent duplication of a video signal recorded on a recording medium or a broadcast video signal input through a tuner, a copy guard signal such as a macrovision signal is inserted into the video signal. It is commonly used. The copy protection signal is inserted into the video signal at the time of producing the video software by the video software maker or inserted into the final output terminal of the recording medium such as a DVD. In the case of NTSC, the copy protection signal is vertically synchronized with the equalizing pulse (E1) period and the equalizing pulse (E2) within the vertical blanking interval (VB), that is, within 21 horizontal lines 21H, as shown in FIG. It is formed by adding a Pseudo Synchronization Pulse and an Automatic Gain Control (AGC) pulse to the remaining sections 10H to 21H other than the pulse VS.

When the video signal including the copy protection signal is reproduced as described above, when the video signal is reproduced by processing like a normal video signal without judging whether or not the copy protection signal is included, the picture is reproduced without any countermeasure against the copy protection signal of the recording medium. In this case, the upper part of the displayed screen is bent or the screen display start position starts from below, which causes difficulty in viewing a normal screen.

SUMMARY OF THE INVENTION The present invention provides a display for processing a copy-protected DVD signal for displaying a normal screen by judging whether or not a copy protection signal is present by determining the presence of a copy protection signal based on a count of H-Sync when an optical recording medium is input. To provide a device.

Another technical problem to be solved by the present invention is to process a copy-protected DVD signal for displaying a normal screen by judging whether or not a copy protection signal is present based on the count of H-Sync at the time of input of an optical recording medium. It is to provide a display method.

According to an aspect of the present invention, there is provided a display apparatus for processing a copy-protected DVD signal, comprising: sync separation means for separating a sync signal from an input video signal; Signal processing means for processing a vertical blanking section of the video signal into an active region or an inactive region by determining whether a copy protection signal is included by comparing a value obtained by counting a horizontal sync signal among the separated sync signals for a predetermined time and a reference value; And display means for processing and displaying a vertical blanking interval signal of the video signal processed as an active or inactive region in the signal processing means.

In the present invention, the signal processing means comprises: a counter for counting a horizontal synchronization signal of the separated synchronization signal for every predetermined time; A comparator for comparing the counted horizontal synchronization signal with a reference value; And when the count value is greater than the reference value, determines that the video signal includes a copy protection signal, and processes the vertical blanking period of the video signal as an inactive region, and when the count value is less than the reference value, And a signal processor configured to process the vertical blanking section of the video signal as an active area by determining that the video signal does not include a copy protection signal.

The display device for processing a copy-protected DVD signal to solve the technical problem to be achieved by the present invention is a video signal reproduction apparatus, the display device counting a horizontal synchronization signal of the input image signal for a predetermined time and a reference value Signal processing means for processing the vertical blanking section of the video signal into an active region or an inactive region after determining whether to include a copy protection signal by comparison; And display means for processing and displaying a vertical blanking interval signal of the video signal processed as an active or inactive region in the signal processing means.

In the present invention, the signal processing means includes a counter for counting a horizontal synchronization signal included in the video signal for each predetermined time; A comparator for comparing the counted horizontal synchronization signal with a reference value; And when the count value is greater than the reference value, determines that the video signal includes a copy protection signal, and processes the vertical blanking period of the video signal as an inactive region, and when the count value is less than the reference value, And a signal processor configured to process the vertical blanking section of the video signal as an active area by determining that the video signal does not include a copy protection signal.

According to another aspect of the present invention, there is provided a display method for processing a copy-protected DVD signal, comprising: (a) separating a sync signal from an input video signal; (b) counting horizontal sync signals among the separated sync signals for every predetermined time; (c) comparing the count value with a reference value to determine whether a copy protection signal is included and then processing the vertical blanking period of the video signal as an active area or an inactive area; And (d) processing and displaying a vertical blanking interval signal of the image signal processed into an active or inactive region.

In the present invention, if the count value is greater than the reference value as a result of the comparison in the step (c), it is determined that the copy signal is included in the video signal, and the vertical blanking section of the video signal is treated as an inactive region. It is done.

In the present invention, if the count value is smaller than the reference value as a result of the comparison in the step (c), it is determined that the copy signal is not included in the video signal, and the vertical blanking section of the video signal is processed as an active area. It features.

According to another aspect of the present invention, there is provided a display method for processing a copy-protected DVD signal, comprising: (a) a horizontal synchronization signal included in the input image signal for a predetermined time; Counting; (b) comparing the count value with a reference value to determine whether a copy protection signal is included and then processing the vertical blanking period of the video signal as an active area or an inactive area; And (c) processing and displaying a vertical blanking interval signal of the image signal processed into an active or inactive region.

In the present invention, if the count value is greater than the reference value as a result of the comparison in the step (c), it is determined that the copy signal is included in the video signal, and the vertical blanking section of the video signal is treated as an inactive region. It is done.

In the present invention, when the count value is smaller than the reference value as a result of the comparison in step (c), it is determined that the copy signal is not included in the video signal, and the vertical blanking section of the video signal is processed as an active area. It is characterized by.

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

2 is a block diagram showing a configuration of a display apparatus for processing a copy-protected DVD signal according to the present invention, which includes a sync separation unit 200, a control unit 201, an ADC 202, a scaler 203, The display unit 204 is configured.

3 is a flowchart illustrating an operation of a display method for processing a copy-protected DVD signal according to the present invention, in which a sync signal is separated from an input DTV / DVD signal (300), and H-Sync is counted every 20 ms. Step 301, determining whether the H-Sync count value is larger than the reference value (302), determining that a copy protection signal is present (303), and treating the vertical blanking interval as a non-active area 304, determining that there is no copy protection signal 305, and processing 306 the vertical blanking interval as an active region.

FIG. 4 is a flowchart illustrating an operation of a first embodiment according to the display method of processing the copy-protected DVD signal of FIG. 3. The method 400 determines 480i / 480p from an input DTV / DVD signal and separates a synchronization signal. Determining whether the DVD signal format is 480i (401), counting H-Sync every 20ms (402), determining whether the H-Sync count value is greater than 308 and less than 328 (403) Determining that there is no protection signal, processing Pre-Coast as 0b and Post-Coast as 0b (404), determining whether the H-Sync count value is greater than 336 and less than 372 (duplicate) Determining that there is a prevention signal, processing Pre-Coast to 0f and Post-Coast to 3B (406), counting H-Sync every 20ms (407), and H-Sync count value is greater than 580 Step 408, determining whether greater than or less than 630, the copy protection signal is present In step 409, the pre-coast is processed as 0b and the post-coast is set to 0b by determining that it is not determined. In step 410, it is determined whether the H-Sync count value is greater than 660 and less than 680. In step 411, the Pre-Coast is processed to 0f and the Post-Coast is processed to 3B.

Next, the present invention will be described in detail with reference to FIGS. 2 to 4.

First, a signal processing apparatus will be described with reference to FIG. 2, and the synchronization separator 200 separates a synchronization signal from an input DTV signal (Y, Pb, Pr) or a DVD signal (Y, Cb, Cr) to synchronize horizontally. The signal H-Syn and the vertical synchronization signal V-Sync are output.

The control unit 201 counts the H-Syn inputted separately from the synchronization separating unit 200 every 20 ms. In the present invention, when the synchronization separation unit 200 is not provided, the control unit 201 counts the H-Syn included in the input DTV signal or the DVD signal every 20 ms. The control unit 201 includes a counter (not shown). The controller 201 compares the counted H-Syn with a reference value and determines whether a copy protection signal exists. As shown in FIG. 1, the copy protection signal is equal to the vertical blanking section VB, that is, the equalizing pulse E1 section and the remaining sections other than the equalizing pulse E2 and the vertical synchronizing pulse VS within 21 horizontal lines 21H. It is formed by adding a pseudo sync pulse and an AGC pulse to 10H to 21H. Therefore, the number of pulses in the vertical blanking period including the copy protection signal is generated more than 40 more than the number of pulses in the vertical blanking period. If the counted H-Sync is greater than the reference value, the controller 201 determines that the copy protection signal is included, and sets a signal for processing the vertical blanking section as an inactive area in the ADC 202. The reason for treating the vertical blanking section as an inactive region is to recognize all of the vertical blanking sections processed as the inactive region as V-Sync. If the counted H-Sync is less than the reference value, the controller 201 determines that the copy protection signal is not included, and sets a signal for processing the vertical blanking section as an active area in the ADC 202.

The ADC 202 converts an image signal input under the control of the control unit 201 into a digital signal. In this case, the ADC 202 processes the vertical blanking interval as an inactive region or an active region according to the vertical blanking interval processing signal output from the controller 201. The ADC 202 is provided with a register (not shown) that stores a signal input from the controller 201 to process the vertical blanking period into an inactive region or an active region. This register is divided into the part where the pre-coast value is set and the part where the post-coast value is set. The control unit 201 sets a value for processing the vertical blanking interval as an inactive region or an active region in this register, and the ADC 202 accesses this register to process the vertical blanking interval as an inactive region or an active region. .

The scaler 203 combines the R, G, and B signals and the horizontal and vertical synchronization signals that are digitally converted and output from the ADC 202, and then adjusts them to the size of the display unit 204 and outputs them to the display unit 204. do.

Since the vertical blanking section is processed as an inactive region for the image signal including the copy protection signal, the upper portion of the screen to be reproduced on the display unit 204 is bent or the screen display starting position is prevented from starting. You can watch normal screen.

Referring to FIG. 3, the signal processing method 200 may include a synchronization signal, that is, H-Sync and V, from an input DTV signal (Y, Pb, Pr) or a DVD signal (Y, Cb, Cr). Disconnect Sync (step 300).

The controller 201 counts H-Sync every 20 ms of the separated synchronization signals (step 301). In the present invention, when the synchronization separation unit 200 is not provided, the control unit 201 counts the H-Syn included in the input DTV signal or the DVD signal every 20 ms.

The control unit 201 determines whether the H-Sync count value is greater than the reference value to determine whether a copy protection signal is present (step 302). The copy protection signal is a pseudo sync pulse in the vertical blanking section VB, that is, in the equalizing pulse E1 section and the remaining sections 10H to 21H other than the equalizing pulse E2 and the vertical synchronizing pulse VS within 21 horizontal lines 21H. And AGC pulses. Therefore, the number of pulses in the vertical blanking period including the copy protection signal is generated more than 40 more than the number of pulses in the vertical blanking period.

If the H-Sync count value is larger than the reference value, the controller 201 determines that a copy protection signal exists in the input video signal (step 303).

The control unit 201 is configured to process the vertical blanking section as a non-active area in order to prevent the upper part of the screen to be reproduced by including the copy protection signal or to start the screen display starting position from below. The signal is set in the ADC 202 (step 304). The reason for treating the vertical blanking section as an inactive region is to recognize all of the vertical blanking sections processed as the inactive region as V-Sync. The ADC 202 converts an image signal input under the control of the control unit 201 into a digital signal. In this case, the ADC 202 processes the vertical blanking section as an inactive region according to the vertical blanking section processing signal output from the controller 201. The control unit 201 sets an arbitrary value for processing the vertical blanking section as an inactive area in a register provided in the ADC 202, and the ADC 202 converts this register into a digital signal. Access to process the vertical blanking section as an inactive region and output it.

If the H-Sync count value is less than the reference value, the controller 201 determines that a copy protection signal does not exist in the input video signal (step 305).

The control unit 201 sets a signal to the ADC 202 to process the vertical blanking section as an active area (step 306). The control unit 201 sets an arbitrary value for processing the vertical blanking section as an active area in a register provided in the ADC 202, and the ADC 202 accesses this register when converting the image signal into a digital signal. The vertical blanking section is processed into an active region and output.

4 illustrates a first embodiment for explaining a signal processing method when an input signal is a DVD signal, the control unit 201 determines 480i / 480p from an input DVD signal, and the synchronization separation unit 200 generates a synchronization signal. That is, the H-Sync and the V-Sync are separated (step 400).

As a result of the determination of the control unit 201, if the input DVD signal format is 480i, H-Sync is counted every 20ms (steps 401 and 402). In the present invention, when the synchronization separation unit 200 is not provided, the control unit 201 counts the H-Syn included in the input DTV signal or the DVD signal every 20 ms.

It is determined whether the H-Sync counted by the control unit 201 is larger than 308 and smaller than 328 (step 403). The number of H-Syncs occurring in 480i format for 20ms is 262 × 60 = x × 50 = 314.4. Here, 262 represents the number of horizontal lines at 480i, 60 is the vertical frequency at this time, x is the number of H-Syncs, and 50 is 20 ms. The copy protection signal is a pseudo sync pulse in the vertical blanking section VB, that is, in the equalizing pulse E1 section and the remaining sections 10H to 21H other than the equalizing pulse E2 and the vertical synchronizing pulse VS within 21 horizontal lines 21H. And AGC pulses. Therefore, the number of pulses in the vertical blanking period including the copy protection signal is generated more than 40 more than the number of pulses in the vertical blanking period.

When the H-Sync counted by the controller 201 is 314.4, since it is larger than 308 and smaller than 328, the controller 201 determines that a copy protection signal does not exist in the input image signal and sets the vertical blanking interval as the active region. In order to process, the ADC 202 sets the Pre-Coast value to 0b and the Post-Coast value to 0b (step 404). Here, 308 and 328 are reference values of any counted H-Sync that may occur in a 20 ms interval (when the video signal of the 480i format does not include a copy protection signal). If the count result value of the control unit 201 is within the range of the reference value, the control unit 201 determines that there is no copy protection signal in the video signal, and the value 0b (Pre-Coast) for processing the vertical blanking section as the active area. Value) // 0b (post-coast value) is set in the ADC 202. When the video signal is converted into a digital signal, the ADC 202 accesses 0b // 0b stored in this register to process and output the vertical blanking section as an active area. The vertical blanking signal including the copy protection signal is divided into pre-coast and post-coast as shown in FIG. 1.

It is determined whether the H-Sync counted by the control unit 201 is larger than 336 and smaller than 372 (step 405). If the video signal includes a copy protection signal, 354.4 counts are added to 314.4, which is the number of H-Syncs generated in the 480i format for 20 ms, plus 40. The copy protection signal is a pseudo sync pulse in the vertical blanking section VB, that is, in the equalizing pulse E1 section and the remaining sections 10H to 21H other than the equalizing pulse E2 and the vertical synchronizing pulse VS within 21 horizontal lines 21H. And AGC pulses. Therefore, the number of pulses in the vertical blanking period including the copy protection signal is generated more than 40 more than the number of pulses in the vertical blanking period.

When the H-Sync counted by the control unit 201 is 354.4, since it is larger than 336 and smaller than 372, the control unit 201 determines that a copy protection signal exists in the input video signal and processes the vertical blanking section as an inactive area. To set the Pre-Coast value to 0f and the Post-Coast value to 3B in step 406. The reason for treating the vertical blanking section as an inactive region is to recognize all of the vertical blanking sections processed as the inactive region as V-Sync. Here, 336 and 372 are reference values of any counted H-Sync that may occur in a 20 ms interval (when a copy protection signal is included in a video signal of 480i format). When the count result value of the control unit 201 is within the range of the reference value, it is determined that a copy protection signal exists in the video signal, and a value 0f (Pre-Coast value) / 3 / 3B for processing the vertical blanking section as an inactive region. (Post-Coast value) is set in the ADC 202. When converting the video signal into a digital signal, the ADC 202 accesses Of // 3B stored in this register to process and output the vertical blanking section as an inactive area.

If the input DVD signal format is 480p, the H-Sync is counted every 20ms (step 407).

It is determined whether the H-Sync counted by the controller 201 is greater than 580 and less than or equal to 630 (step 408). The number of H-Syncs that occur in the 480p format for 20ms is 525 × 60 = x × 50 = 630. Here, 525 represents the number of horizontal lines at 480p, 60 represents the vertical frequency at this time, x represents the number of H-Syncs, and 50 represents 20 ms. The copy protection signal is a pseudo sync pulse in the vertical blanking section VB, that is, in the equalizing pulse E1 section and the remaining sections 10H to 21H other than the equalizing pulse E2 and the vertical synchronizing pulse VS within 21 horizontal lines 21H. And AGC pulses. Therefore, the number of pulses in the vertical blanking period including the copy protection signal is generated more than 40 more than the number of pulses in the vertical blanking period.

When the H-Sync counted by the control unit 201 is 630, since it is in a range larger than 580 and less than or equal to 630, the control unit 201 determines that there is no copy protection signal in the input video signal and determines that there is no vertical blanking. In order to process the interval as the active region, the ADC 202 sets the Pre-Coast value to 0b and the Post-Coast value to 0b (step 409). Here, 580 and 630 are reference values of any counted H-Sync that may occur in a 20 ms interval (when the 480p format video signal does not include the copy protection signal). When the count result value of the control unit 201 is within the range of the reference value, it is determined that there is no copy protection signal in the video signal, and a value 0b (Pre-Coast value) // 0b for processing the vertical blanking section as the active area. (Post-Coast value) is set in the ADC 202. When the video signal is converted into a digital signal, the ADC 202 accesses 0b // 0b stored in this register to process and output the vertical blanking section as an active area. The vertical blanking signal including the copy protection signal is divided into pre-coast and post-coast as shown in FIG. 1.

It is determined whether the H-Sync counted by the control unit 201 is greater than 660 and less than 410 (step 410). When the video signal includes the copy protection signal, 670, which is 40, is added to 630, which is the number of H-Syncs generated in the 480p format for 20 ms. The copy protection signal is a pseudo sync pulse in the vertical blanking section VB, that is, in the equalizing pulse E1 section and the remaining sections 10H to 21H other than the equalizing pulse E2 and the vertical synchronizing pulse VS within 21 horizontal lines 21H. And AGC pulses. Therefore, the number of pulses in the vertical blanking period including the copy protection signal is generated more than 40 more than the number of pulses in the vertical blanking period.

When the H-Sync counted by the control unit 201 is 670, since it is larger than 660 and smaller than 680, the control unit 201 determines that a copy protection signal exists in the input image signal and processes the vertical blanking section as an inactive region. To set the Pre-Coast value to 0f and the Post-Coast value to 3B in step 406. The reason for treating the vertical blanking section as an inactive region is to recognize all of the vertical blanking sections processed as the inactive region as V-Sync. Here, 660 and 680 are reference values of any counted H-Sync that may occur in a 20 ms interval (when a copy protection signal is included in a video signal of 480p format). When the count result value of the control unit 201 is within the range of the reference value, it is determined that a copy protection signal exists in the video signal, and a value 0f (Pre-Coast value) / 3 / 3B for processing the vertical blanking section as an inactive region. (Post-Coast value) is set in the ADC 202. When converting the video signal into a digital signal, the ADC 202 accesses Of // 3B stored in this register to process and output the vertical blanking section as an inactive area.

Since the vertical blanking section is processed as an inactive region for the image signal including the copy protection signal, the upper portion of the screen to be reproduced on the display unit 204 is bent or the screen display starting position is prevented from starting. You can watch normal screen.

The present invention is not limited to the above-described embodiments and can be modified by those skilled in the art within the spirit of the invention.

As described above, according to the present invention, the consumer can watch a normal screen by applying H-Sync counting at the time of input of the optical recording medium and applying a signal processing method differently when there is a copy protection signal and when it does not exist.

1 is a diagram illustrating an NTSC video signal and a copy protection signal.

2 is a block diagram showing a configuration of a display apparatus for processing a copy protected DVD signal according to the present invention.

3 is a flowchart illustrating an operation of a display method for processing a copy-protected DVD signal according to the present invention.

4 is a flowchart illustrating an operation of a first embodiment according to the display method of processing the copy-protected DVD signal of FIG. 3.

Claims (10)

In the video signal reproduction apparatus, Sync separating means for separating a sync signal from the input video signal; The horizontal synchronization signal of the separated synchronization signal is compared with a reference value counted every predetermined time to determine whether the copy protection signal is included, and then the vertical blanking period of the image signal is determined to include the active area or the copy protection signal. Signal processing means for processing an inactive region including a copy protection signal; And And display means for processing and displaying a vertical blanking interval signal of the video signal processed into an active or inactive region by the signal processing means. The method of claim 1, wherein the signal processing means A counter for counting a horizontal sync signal among the separated sync signals for every predetermined time; A comparator for comparing the counted horizontal synchronization signal with a reference value; And If the count value is greater than the reference value according to the comparison result, it is determined that the copy signal is included in the video signal, and the vertical blanking section of the video signal is treated as an inactive region. If the count value is less than the reference value, the video signal is processed. And a signal processor configured to process the vertical blanking section of the image signal as an active area by determining that the signal does not include a copy protection signal. In the video signal reproduction apparatus, It is determined whether a copy protection signal is included by comparing a value of a horizontal synchronization signal counted for a predetermined time and a reference value among the input image signals, and then a vertical blanking period of the video signal is included in the active area or the copy protection signal. Signal processing means for processing an inactive region including a copy protection signal; And And display means for processing and displaying a vertical blanking interval signal of the video signal processed into an active or inactive region by the signal processing means. The method of claim 3, wherein the signal processing means A counter for counting a horizontal synchronizing signal included in the video signal for every predetermined time; A comparator for comparing the counted horizontal synchronization signal with a reference value; And If the count value is greater than the reference value according to the comparison result, it is determined that the copy signal is included in the video signal, and the vertical blanking section of the video signal is treated as an inactive region. If the count value is less than the reference value, the video signal is processed. And a signal processor configured to process the vertical blanking section of the image signal as an active area by determining that the signal does not include a copy protection signal. In the video signal reproduction method, (a) separating a synchronization signal from the input image signal; (b) counting horizontal sync signals among the separated sync signals for every predetermined time; (c) determining whether a copy protection signal is included by comparing the count value with a reference value, and then processing a vertical blanking period of the video signal as an active area not including the copy protection signal or an inactive area including the copy protection signal. step; And and (d) processing and displaying a vertical blanking interval signal of the image signal processed into an active or inactive region. The method of claim 5, wherein in step (c), And if the count value is greater than a reference value, determines that the copy signal is included in the video signal and processes the vertical blanking section of the video signal as an inactive region. The method of claim 5, wherein in step (c), And if the count value is smaller than a reference value, determining that the image signal does not include a copy protection signal, and processing a vertical blanking section of the image signal as an active area. In the video signal reproduction method, (a) counting a horizontal synchronization signal included in the input image signal for each predetermined time; (b) comparing the count value with a reference value to determine whether to include a copy protection signal and processing a vertical blanking period of the video signal as an active area not including the copy protection signal or an inactive area including the copy protection signal. step; And and (c) processing and displaying a vertical blanking interval signal of the image signal processed into an active or inactive region. The method of claim 8, wherein in step (c), And if the count value is greater than a reference value, determines that the copy signal is included in the video signal and processes the vertical blanking section of the video signal as an inactive region. The method of claim 8, wherein in step (c), And if the count value is smaller than a reference value, determining that the image signal does not include a copy protection signal, and processing a vertical blanking section of the image signal as an active area.