KR100285598B1 - OSD generating apparatus and method for generating same in PDTV - Google Patents

Abstract

The present invention relates to an OSD generation technique in a PDTV television capable of generating an OSD signal having a translucent halftone form in a PDTV. To this end, the present invention relates to an input digital signal in an interval in which only an OSD subblank signal exists. Data is alternately deduced and mixed with translucent data, and halftone is processed through data processing that discards the input digital data in the section where the OSD sub blank signal and the OSD main blank signal exist simultaneously and inserts the actual OSD data in the discard section. By generating OSD data, a halftone OSD signal including a semi-transparent OSD area in which the screen image obscured by the OSD signal appears translucent and a full OSD area in which the screen image obscured by the OSD signal does not appear at all can be realized on the PDP screen. , To meet the various needs of users The key is to realize the OSD.

Description

OSD generating apparatus and method for generating same in PDTV

TECHNICAL FIELD The present invention relates to a PDP TV, and more particularly, to an OSD generating apparatus in a PDTV television suitable for generating an on-screen display (OSD) having a halftone form in a PDTV television, and the generation thereof. It is about a method.

In general, a PDP TV converts an analog video signal of a tuned and input broadcast channel into digital data of n bits (for example, 8 bits of RGB in 256 gray scales) based on a predetermined sampling clock. For gradation processing on digital data, one field of image data is reconstructed into n subfield data (that is, sub_1 to sub_8), and the image data thus reconstructed into subfields are displayed on a panel.

As is well known, in the case of a general television using a CRT, an OSD processor is used to generate various OSD signals such as an OSD and a capturer OSD according to a user's request and display them on a monitor. In this case, as the OSD signal displayed on the monitor, a full OSD signal and a part of the OSD signal are semi-transparently processed so that an image part hidden by the OSD signal does not appear. There is a translucent OSD signal that appears.

Therefore, the technique of generating OSD data and displaying the OSD signal on the PDP panel is adopted in the PDTV as in the above-described general television.

On the other hand, unlike general television, PDTV television processes OSD data because n-bit digital data (i.e., n-bit each of RGB) is reconstructed and displayed as n sub-field data (e.g., 8 sub-field data). In this case, it could only be processed as a full OSD signal, in which the image part of the screen covered by the OSD signal was not displayed. That is, conventionally, when displaying an OSD signal on a PDTV, only the full OSD signal is processed.

However, given that translucent OSD techniques are implemented in general televisions to satisfy various service needs of users, it may be necessary to realize translucent OSD techniques in PDTV, but at present it is not possible to use them. There is no limit.

Accordingly, an object of the present invention is to provide an OSD generating apparatus and method for generating the same in a PDTV television capable of generating an OSD signal having a translucent halftone form in a PDTV. There is this.

In accordance with an aspect of the present invention, there is provided an apparatus for generating an OSD in a PDTV television that displays digital image data reconstructed into n subfields on a PDP panel in an N × M metric form. data rearrangement means for reconstructing n bits of digital image data into n subfields; Control means for generating an OSD sub blank signal, an OSD main blank signal, and an OSD generation control signal required for OSD generation in response to the OSD generation control signal; OSD generating means for extracting and outputting the stored OSD data for OSD generation in response to the OSD generation control signal; And when the OSD sub blank signal is generated, alternately selects the reconstructed digital image data one pixel at a time and maps them to zero values, and mixes the selected pixel and the zero value mapped pixel with previously stored semitransparent data to generate a semi-transparent OSD region. Generating data and replacing the reconstructed digital image data inputted in the section in which the OSD sub blank signal and the OSD main blank signal exist simultaneously with the extracted OSD data to replace the OSD data having a translucent halftone form. An apparatus for generating OSD in PDTV television comprising means for synthesizing to reconstructed digital image data.

In accordance with another aspect of the present invention, there is provided a method for generating an OSD in a PDTV television displaying digital image data reconstructed into n subfields on a PDP panel in the form of an N × M matrix. a first step of reconstructing n bits of digital image data into n subfields; Based on the OSD sub blank signal generated according to the OSD generation control signal, the reconstructed digital image data are alternately selected one pixel at a time and mapped to a zero value, and the selected pixel and the zero value mapped pixel are previously stored with the semi-transparent data. A second process of mixing to generate translucent OSD region data; When the main blank section setting signal is generated based on the generated OSD sub blank signal and the OSD main blank signal, the complete OSD area data is generated by replacing the digital image data included in the generated main blank section with pre-stored OSD data. The third process of doing; A fourth process of repeating the second process until the generated OSD sub blank signal ends when the main blank period setting signal ends; A method of generating OSD in a PDTV comprising a fifth process of repeatedly performing the second to fourth processes for each line until the generation of all OSD data having a translucent region is completed.

1 is a block diagram of an OSD generating apparatus in a PDTV according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a process of generating OSD screen data having a halftone form according to the present invention;

3 is a diagram illustrating an example in which the OSD data having halftones is displayed on a screen according to the present invention;

4 is a diagram illustrating an example of extracting pixel data of an input image in an OSD sub blank area based on an OSD sub blank signal and an OSD main blank signal according to the present invention;

FIG. 5 is an exemplary view illustrating a process of performing data extraction alternately at one line interval in a sub blank section in an OSD section according to the present invention; FIG.

<Description of the code | symbol about the principal part of drawing>

102: first memory block 104: data rearrangement block

106: control block 108: end gate

110: second memory block 112: OSD generation block

114: data selection block

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

First, a key technical aspect of the present invention is to implement an OSD signal having a halftone form in a PDTV, such as in a general television using a CRT, that is, as shown in FIG. 3 as an example, completely on the screen 302. OSD area (OSD area where an image portion of the screen obscured by the OSD signal does not appear, only pure OSD signal is displayed) 304a and translucent OSD area (OSD area where the image portion of the screen obscured by the OSD signal appears translucent) 304b. By implementing the OSD signal 304 in the form of a halftone, it is possible to achieve the purpose of the present invention. Thus, assuming that there is an arbitrary object T on the screen obscured by the OSD signal, any object appears semitransparent in the semi-transparent OSD area 304b but not in the full OSD area 304a at all.

FIG. 1 is a block diagram of an OSD generating apparatus in a PDTV according to a preferred embodiment of the present invention. The first memory block 102, the data rearrangement block 104, the control block 106, and the gate are shown in FIG. 108, a second memory block 110, an OSD generation block 112, and a data selection block 114.

Referring to FIG. 1, in the first memory block 102, n bits of digital data (that is, RGB each n) are provided through an A / D converter, not shown, based on a write address signal provided from the control block 106. Bits) are sequentially stored in the order from the upper bit to the lower bit, and the digital data thus stored are read when the read address signal is provided from the control block 106 and provided to the next data rearrangement block 104.

In the data rearrangement block 104, the n-bit digital data provided from the first memory block 102 is reconstructed into n subfield data (for example, 8 subfield data). The subfield data is provided to the next data selection block 114 via the line L11.

The control block 106 then comprises a microprocessor, for example, which performs overall operational control of the PDP TV, which controls the data writing and reading in the memory block 102 and also in accordance with the invention Various controls for generating an OSD signal having a tone shape are performed.

That is, in the control block 106, in response to caption data generation or a user OSD request signal, an OSD sub blank signal (i.e., halftone blank area), as shown in FIG. 4A, as an example, is generated on the line L12. To the one-side terminal and data selection block 114 of the AND gate 108, respectively, and on line L13, an area where the OSD main blank signal (i.e., only actual OSD data is loaded), as shown in FIG. 4B as an example. ) Is generated and provided to the other terminal of the AND gate 108, and an OSD generation control signal is generated on the line L14 and provided to the OSD generation block 112. At this time, the OSD generation control signal generated on the line L14 is synchronized with the generation of the OSD main blank signal on the line L13.

In addition, the AND gate 108 takes a logical product of an OSD sub blank signal provided to one terminal through a line L12 and an OSD main blank signal provided to the other terminal through a line L13, thereby allowing the main blank to display only actual OSD data. The interval setting signal is generated on the line L15 and provided to the data selection block 114.

On the other hand, in the OSD generation block 112, in response to the OSD generation control signal provided from the control block 106 through the line L14, OSD data stored in the second memory block 110 is withdrawn and then extracted. The OSD data (i.e., the actual OSD data displayed in the full OSD area shown in FIG. 3) is provided to data selection block 114 via line L16.

Next, in the data selection block 114, the reconstructed subfield data on the line L11 in the normal case of not generating the OSD signal is transferred directly to the data driver, not shown, and the line L12 at the time of generating the OSD data according to the present invention. On the basis of the OSD sub blank signal on the line and the main blank period setting signal on the line L15, the OSD data having the halftone shape is generated by adaptively mixing the image data on the line L11 and the OSD data on the line L16.

That is, when the OSD sub blank signal ht is applied through the line L12, the data selection block 114 extracts the digital data provided by the line L11 by one pixel unit, that is, as an example, as shown in FIG. 4C. As shown in 4d, data is alternately extracted by selecting D1 data, discarding D2 data, and selecting D3 data again. In this case, the discarded data section is filled with zero values (that is, the data value of the discarded data section is mapped to zero value), and the data D refers to R.G.B data that substantially constitutes one pixel.

Then, the selected data and the data filled with zero values (data discarded by the actual image data) are mixed with previously stored translucent data. As such, the section in which the selected deduced digital data and the translucent data are mixed is represented by the translucent OSD area 304b shown in FIG. 3 as an example when displaying on the PDP panel.

Subsequently, if the main blank section setting signal Y is applied through the line L15 while alternately selecting and deciphering the digital data as described above and hoping with the semi-transparent data, the data selection block 114 synchronizes the line L11 with this. Discard all the image data provided through and insert the OSD data provided through the line L16 into the discarded data section. At this time, the OSD data section inserted into the discarded data section is represented as the complete OSD region 304a shown in FIG. 3 as an example when displaying on the PDP panel.

Then, in the data selection block 114, as shown in FIG. 4D, the input data rounding and translucent are again selected in the interval between the end point of the main blank signal T and the end point of the OSD sub blank signal ht again. You will be mixing with the data.

When the OSD sub-blank signal ht and the main blank signal Y are repeated for each line, the data selection and blending and the switching to the OSD data are performed through the data processing process. Generates OSD data having a form, i.e., generates composite image data in which halftone OSD data and input image data are mixed, and the generated composite image data is provided to a data driver (not shown), thereby providing an example on a PDP panel. An OSD signal having a halftone shape as shown in 3 will be displayed.

On the other hand, when the data of the semi-transparent OSD area in the OSD signal is generated by the zero value, only the data of the position corresponding to the vertical direction for each line fills zero value, which is likely to rain in the vertical direction in the translucent OSD area of the displayed OSD signal. In view of the above, the present invention performs data deduction in the form of crossing each other between adjacent lines in consideration of this point, that is, as shown in FIG. 5 as an example, only odd-numbered pixel data are selected in odd-numbered lines. In the even-numbered line, only even-numbered pixel data is selected. Therefore, in the present invention, it is possible to prevent the OSD signal from deteriorating by selecting pixel data crossing between the lines.

Next, a process of generating OSD data having halftones in accordance with the flow in the OSD generating apparatus of the present invention having the above-described configuration will be described.

2 is a flowchart illustrating a process of generating OSD screen data having a halftone form according to the present invention.

Referring to Fig. 2, when the PDTV is in the normal viewing mode (step 202), the data selection block 114 determines whether the OSD sub blank signal ht is generated due to the generation of user requests or caption data. If it is determined in step 204 that the OSD sub blank signal ht has been determined as a result of the check here, it performs alternating data blending and mixing on the input digital data in synchronization with the generation, i.e., odd number of lines Select data (or even-numbered data), fill the even-numbered data (or odd-numbered data) with zero values (i.e., zero-value mapping), and then perform a data rounding and blending process with the translucent data (steps 206 and 208). ).

The data deduction and mixing process is continued until the main blank section setting signal Y 'on which the actual OSD data is carried on the line L15 occurs. As a result of the check in step 210, the main blank section setting signal Y ') Occurs, i.e., the main blank period setting signal Y' based on the OSD sub blank signal ht and the OSD main blank signal Y generated in the control block 106 occurs, the data selection block 114 ), The actual OSD data is set as the main blank section in the section in which the main blank section setting signal Y 'is generated (step 212), and the image data provided through the line L11 for the main blank section thus set (i.e., In operation 214, the reconstructed subfield data is discarded and the OSD data provided from the OSD generation block 112 is inserted through the line L16 in the discarded data section (step 214).

The process of switching to the OSD data continues until the main blank section setting signal Y 'ends. When the check in step 216 terminates the main blank section setting signal Y', the data selection block ( In step 114, the odd-numbered data (or even-numbered data) of one line is selected and the even-numbered data (or the same) as in the above-described steps 206 and 208 until the OSD sub blank signal ht ends again. The odd-numbered data) are filled with zero values, and then data rounding and mixing are performed (steps 218 and 220).

On the other hand, if the OSD sub blank signal ht is terminated as a result of the check in step 22, the data selection block 114 performs normal input data processing, i.e., reconstructed subfield data on the line L11 is omitted. The transfer to the data driver is performed (step 224).

Therefore, by performing the data processing process as described above for each line, data processing (i.e., input data transfer, input data blending and mixing, and switching to OSD data) for all the lines where the OSD signals are mixed is performed. As a result, an OSD signal having a halftone shape as shown in FIG. 3 is displayed on the PDP panel as an example.

As described above, according to the present invention, the input digital data is alternately deduced and mixed with the semi-transparent data in the section where only the OSD sub blank signal exists, and the input digital is displayed in the section where the OSD sub blank signal and the OSD main blank signal exist simultaneously. By generating the OSD data with halftone through discarding the data and inserting the actual OSD data into the discarded section, the semi-transparent OSD area in which the screen image obscured by the OSD signal is translucent and the screen image obscured by the OSD signal are not displayed at all. The halftone-type OSD signal in the full OSD area can be implemented on the PDP screen, thereby realizing an OSD that satisfactorily meets various service needs of the user.

Claims (4)

An apparatus for generating an OSD in a PDTV that displays digital image data reconstructed into n subfields on a PDP panel in the form of an N × M matrix. data rearrangement means for reconstructing n bits of digital image data into n subfields; Control means for generating an OSD sub blank signal, an OSD main blank signal, and an OSD generation control signal required for OSD generation in response to the OSD generation control signal; OSD generating means for extracting and outputting the stored OSD data for OSD generation in response to the OSD generation control signal; And When the OSD sub blank signal is generated, the reconstructed digital image data are alternately selected by one pixel to be mapped to zero values, and the semi-transparent OSD region data is obtained by mixing the selected pixel and the zero value mapped pixel with previously stored translucent data. And reconstructing the OSD data having a translucent halftone form by replacing the reconstructed digital image data inputted in the section in which the OSD sub blank signal and the OSD main blank signal exist simultaneously with the extracted OSD data. An OSD generating device in a PDTV comprising a means for synthesizing the digital image data. The method of claim 1, wherein the synthesizing means maps the even-numbered pixel data selected in the odd-numbered line to a zero value and the odd-numbered pixel data selected in the even-numbered line based on the generated OSD sub blank signal. An OSD generating device for PDTV, characterized in that the mapping is performed. A method for generating an OSD in a PDTV that displays digital image data reconstructed into n subfields on a PDP panel in the form of an N × M matrix, a first step of reconstructing n bits of digital image data into n subfields; Based on the OSD sub blank signal generated according to the OSD generation control signal, the reconstructed digital image data are alternately selected one pixel at a time and mapped to a zero value, and the selected pixel and the zero value mapped pixel are previously stored with the semi-transparent data. A second process of mixing to generate translucent OSD region data; When the main blank section setting signal is generated based on the generated OSD sub blank signal and the OSD main blank signal, the complete OSD area data is generated by replacing the digital image data included in the generated main blank section with pre-stored OSD data. The third process of doing; A fourth process of repeating the second process until the generated OSD sub blank signal ends when the main blank period setting signal ends; And a fifth process of repeating the second to fourth processes for each line until the generation of the entire OSD data having the translucent region is completed. 4. The PDP of claim 3, wherein the second process maps the odd-numbered pixel data selected in a subsequent line to a zero value when mapping the even-numbered pixel data selected in a line currently being processed to a zero value. How to create OSD on TV.