JP2002140062A - Device and method for rotating on-screen display font - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method which can display an OSD message and video at positions where a user can easily view them even when the OSD font is rotated. SOLUTION: The OSD rotating device is equipped with a central processor, a font address generator, a memory, a font ROM, a decoder, a shift register, an output controller, an output circuit, a synchronizing signal generator, and a display device. By this constitution, an OSD font corresponding to an OSD font address is generated. Then the OSD font is read out and sent to the decoder. Further, the decoder decodes the OSD font to generate multiple rotated fonts. The OSD message including the rotated fonts is displayed by the display device so that the display of the video is synchronized with the OSD message.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to an apparatus and a method for rotating fonts.
In particular, it relates to an apparatus and method for rotating on-screen display (OSD) fonts.

[0002] BACKGROUND OF THE INVENTION In recent years, computer rapidly spread to the peripheral fields, many of the display device, e.g., a cathode ray tube (CRT) display preparative liquid crystal displays (LCD) play an increasingly important role in that area. The performance of these displays is
Manufacturer's optimal parameters, for example, contrast,
It basically depends on brightness, vertical / horizontal size, geometric shape, etc. and parameter calibration. To obtain the best display quality via these multiple parameters, the on-screen display (OSD) provides the user with interactive information. There is a select button for the OSD message display mode. When the user presses the select button to issue a request signal, the OSD device receives the request signal, which is sent to the central processing unit (CPU) of the OSD device to output contrast, brightness, vertical / horizontal directions. The size is precisely controlled. Further, the user can clearly observe the effect of adjusting the plurality of parameters. In addition, the video display is superimposed on the OSD message.

[0003] However, when the display device rotates,
That is, if the OSD message is asynchronous with the display of the video and the OSD message is set at an inappropriate position that is disadvantageous for the user to see a plurality of parameters in the OSD message, the conventional OSD message is Not adapted to video display. For this reason, a large deviation occurs when adjusting a plurality of parameters, resulting in an inconvenient state. In order to completely display an image by performing line scanning, most current display devices continuously scan each line corresponding to vertical / horizontal signals of the display device. Therefore,
It is necessary to continuously output the font of the OSD message to the display device. OSD even if display device rotates
Since the vertical / horizontal signals applied to the device are invariant, the OSD
The message and the display are asynchronous. As a result, the OS
Since the D message does not match the display of the image, the view position is inappropriate for the user. O after rotation of the display device
FIG. 1A shows the relationship between the SD message and the video display.

As a result, when the display device rotates, the conventional OSD message is not synchronized with the display of the video. In this situation, adjusting the parameters of the display device is extremely inconvenient and causes many errors. Further, since the font of the conventional OSD message is constituted by a bitmap, the processing of the OSD font is inefficient. Rotating an OSD font not only uses a lot of memory, but also increases the computation time.

[0005] SUMMARY In view of this the present invention, the conventional OSD device the problem OSD message is displayed and asynchronous video is facing.

Accordingly, it is a primary object of the present invention to provide an apparatus and a method for displaying an OSD message and an image at a position where a user can easily view the image even when the OSD font is rotated.

Another object of the present invention is to utilize a font-based readout device to access a font read-only memory (R).
OM) is to provide an apparatus and method that significantly reduces the cost.

In accordance with the above objects, the present invention provides an apparatus and method for rotating an OSD font. Devices for rotating the OSD font include a central processing unit (CPU), a font address generator, a memory, a font ROM, a decoder, a shift register, an output controller, an output circuit,
An OSD rotation device including a synchronization signal generator and a display device is provided.

When an OSD display request that causes the CPU to start reading a plurality of OSD font addresses is input to the CPU, a plurality of OSD fonts corresponding to the OSD font addresses are generated and stored in a memory.
Next, the OSD font corresponding to the font address is read and sent to the decoder. Here, the OSD font is initially stored in the font ROM. Further, the decoder performs a decoding process on the OSD font to form a plurality of rotated fonts. These rotated fonts are stored in a storage medium and are continuously output to an output circuit. An OSD message including the rotated font is displayed on the display device so that the OSD message and the display of the video are synchronized.

The apparatus and method of the present invention for suitably displaying OSD messages and images by rotating on-screen display fonts will be described. Further, in the present invention, since the OSD font is read on a font basis, the OSD font is read.
The font rotation processing time is extremely shorter than a conventional OSD bitmap rotated font. Further, by using OSD fonts with various rotation angles, the number of OSD fonts that are duplicated can be significantly reduced.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing detailed description of the invention and many of its advantages can be readily and properly understood by better understanding the following detailed description in conjunction with the accompanying drawings.

[0012] DETAILED DESCRIPTION OF THE INVENTION Preferred embodiments provide an apparatus and a method of rotating the OSD font to improve the aforementioned drawbacks.

Referring now to FIG. 1B, this figure shows the relationship between the OSD message after rotation of the display device and the display of the image. The present invention provides an apparatus and method for generating an OSD message and forming a rotated OSD font so that the display of the OSD message and the display of the image are harmonized on a display device.

Referring to FIGS. 2A-2E, these figures illustrate the basic principles of rotating OSD fonts. In a preferred embodiment of the present invention, after rotation of the OSD font,
An ideographic character, for example, the ideographic character "P" is continuously 2 in the horizontal direction.
01 is read. However, after the rotation of the OSD font, the ideographic characters need to be read in the vertical direction 203, which is used by the decoder to decode the OSD font and the rotated OSD font is output. In particular, when an OSD font based on ideographic characters having various patterns shown in FIGS. 2B to 2E is output, the display of the OSD message and the image on the display device are always in harmony. In addition, ideographic characters can be replaced with patterns, alphabetic characters, numbers, and special characters.

Referring to FIG. 2A, this shows a dot matrix for an OSD font. In the preferred embodiment of the present invention, OSD fonts are stored in a dot matrix 200 type memory. In other words, the OSD font includes a plurality of dots stored for each line in the font ROM. The main characteristic of reading an OSD font is called "font base" which means one OSD font, not individual dots 202 of the OSD font at a time.

The OSD font is composed of an mxn dot matrix. Here, m and n are positive integers, and m = 1
2, n = 18 and the total number of dots of the OSD font is 216
It is desirable to be dots. Further, the bit value of the black dot is defined as “1”, and the bit value of the white dot is “0”.
Where the left side of the dot matrix is defined as the most significant bit (MSB) 204 and the right side of the dot matrix is defined as the least significant bit (LSB) 206.

Referring to FIG. 2B, this figure shows the font R
The first OSD font stored in the OM on a font basis is shown. The OSD rotation device moves from the left MSB to the right L
Read each column 210 of 18 bits up to SB at once,
12 consecutively to form a complete OSD font
Read the OSD font twice. In the example of the ideographic character "P",
If the sixth row 212 of the ideographic character needs to be indicated, a column 210 of the 18-bit ideographic character is read until the ideographic character is completely read, but only the sixth bit of each column 210 is selected. When the ideographic characters are read in order 12 times, the sixth line 212 is completely formed. Here, these respective bit values are "00" in the order of MSB to LSB.
1100001100 ".

Referring to FIG. 2C, this figure shows the font R
The second OSD font stored in the OM on a font basis is shown. The OSD rotator reads each of the 18-bit rows 216 from the upper LSB on the left to the lower MSB on the right at a time, and reads the O.D.
The SD font is read continuously 12 times. The ideographic character "P"
In the example, if it is necessary to indicate the sixth row 218 of the ideographic character, one of the ideographic characters is read until the ideographic character is completely read.
One row 216 of 8 bits is read at a time. 6th row 218
Is read, the data of the sixth row 218 is completely formed at one time. Here, these respective bit values are “001100110110” in order from left to right in FIG. 2C.
000000 ".

Referring to FIG. 2D, this figure shows the font R
The third OSD font stored in the OM on a font basis is shown. The OSD rotator reads each row 222 of 18 bits from the upper MSB on the left to the lower LSB on the right at a time. Then, the OSD font is read continuously 12 times to completely form the OSD font.
In the example of the ideographic character "P", if it is necessary to indicate the sixth row 224 of the ideographic character, a row 222 of 18 bits of the ideographic character is read at a time until the ideographic character is completely read. When the sixth row 224 is read, the data of the sixth row 224 is completely formed at one time. Here, these respective bit values are “000” in order from left to right in FIG. 2D.
00000110100100 ".

Referring to FIG. 2E, this figure shows the font R
The fourth OSD font stored in the OM on a font basis is shown. The OSD rotation device moves from the left MSB to the right L
Each column 228 of 18 bits up to SB is read at a time.
Then, to completely form the OSD font, use OSD
The font is read continuously 12 times. The ideographic character "P"
In the example, if it is necessary to display the sixth row 230 of ideographic characters, only the sixth bit of each column 228 is selected, and a column 228 of 18 bits of ideographic characters is read until the ideographic character is completely read. Read at once. Reading out the ideographic characters 12 times, the sixth row 230 is completely formed. Here, each of these bit values is from MSB to LSB.
Up to "000000001100".

Referring to FIG. 3, this is a system block diagram 300 illustrating the rotation of an OSD font. The system block diagram 300 includes a central processing unit (CPU) 3
06, font address generator 308, memory 310,
Font ROM 312, decoder 314, shift register 316, output controller 318, output circuit 320,
OSD with synchronization signal generator 304 and display device 322
A rotating device 302 is included.

The synchronization signal generator 304 is a scan frequency generator of the display device 322, and is used as a reference signal for the rotated OSD font during scanning in order to match the OSD message including the OSD rotated font with the display of the image in the display direction. used. The CPU 306, for example, a microcontroller (MCU) or a digital signal processor (DS)
P) plays an important role for rotated OSD fonts. The CPU 306 uses various buses (324, 326), for example, a control bus, an address bus, and a data bus.
The signals to be processed and the OSD font are transferred to various elements in the OSD rotator.

The font address generator 308 is an OSD font address generator controlled by the CPU 306 to form a desired OSD font, and uses the synchronization generator 304 as a reference signal source. A memory 310 such as a static access memory (SRAM)
This is a medium-capacity storage device used to store a font address of a desired OSD font. Also, font RO
M312 is a medium capacity storage device used to store the OSD font of the OSD message. Using a storage medium that is the shift register 316, the parallel data format is converted into a serial data format stored in a memory, and is continuously transferred to the output circuit 320. The output controller 318 is an output control device that controls the OSD font output priority of the output circuit 320 based on a control signal from the CPU 306.

In addition to receiving the color attributes of the OSD font, such as red, blue, and green, an output circuit 316 as an output device
Performs data conversion and displays the rotated font on the display device 322.
Send to In other words, the digital signal of the OSD font is converted to an analog signal, mixed with the attributes of the OSD font, and sent to various display devices 322 to various standard interface cards. In addition, these display devices 322
Has a CRT display, home TV and LCD.

Referring to FIG. 4, this diagram illustrates a decoder 40.
0 is shown. Decoder 4 of preferred embodiment of the present invention
00 denotes a plurality of decoding elements (400 ₁ ,..., 400 _m ),
A scan controller 404 and an output selector 406 are provided. Each of the decoding processing elements, shown as B ₁ 400 ₁ ,..., B _m 400 _m, etc., includes four channels 412 for receiving control signals from the control bus 324 of the CPU 306 and uses these signals to generate four channels. Kind of angle, ie 0
It is preferable to control the rotation angle of the OSD font corresponding to °, 90 ° clockwise, 90 ° counterclockwise, clockwise of the display device, or 180 ° counterclockwise. Also, the OSD from the data bus 326 is
Font, eg, OSD in font ROM 312, etc.
There are z data channel lines 416 for receiving fonts continuously and also each decoder element (400 ₁ ,
, 400 _m ) are desirably provided. Where z is OS
This is the number of D fonts. The n lines of channel 410 are connected to a scan controller 404, which controls the output of the rotated OSD font after decoding.

The scan controller 404, which is connected to each of the decoding element and the synchronization generator (not shown), receives the signal from the synchronization signal generator 304 by using the L of the channel.
With n lines 410 denoted as 1, L2,..., Ln-1, Ln, the scan sequence of the decoder can be completely controlled by the scan controller. In other words, the scan controller can selectively control the dot output of the OSD font based on the horizontal / vertical synchronization signals. In addition, the scan selection includes various coordinate axes. For example, the horizontal direction (X axis) and the vertical direction (Y axis) of the font dot matrix.

The output selector 406 connected to the decoding element and the CPU comprises n select lines 408, denoted D1, D2,..., Dn-1, Dn, and connected to the data bus. . Thus, the output of the decoding processing element can be received, and the output priority of the rotated OSD font can be accurately controlled. D1 is the LSB,
Dn is the MSB.

According to a preferred embodiment of the present invention, the 12 × 18 dot ideographic character “P” is decoded by the decoder.
Is read, the display device 322 is placed at the position of 0 ° based on the basic principle shown in FIG. 2B. CPU 30
6 recognizes the 0 ° position, for example, the sixth row 212, that is, all of the 12 columns of the OSD font are read simultaneously by the decoding processing element. 212 can be decoded and selectively output to shift register 316. That, B ₁ by L ₆ becomes possible to send selectively the dots (1,6) to D _1, it is the same behavior of the rest of the line. Also, L ₆ allows B ₁₂ to selectively send dots (12, 6) to D ₁₂ to form sixth row 212. From the same viewpoint, other lines of the ideographic character "P" are also formed. Finally, the ideographic character "
P "is displayed from the first line to the eighteenth line.

Similarly, for example, the left side and the right side of the dot matrix of the ideographic character "P" are exchanged. Then, in FIG. 2B, which is defined as the first mirror image position, the upper side and the lower side are defined as standard. Thereby, the MSB of the dot matrix and L
SB is exchanged. That is, D12 is exchanged with D1 as the MSB, and D1 is exchanged with D12 as the LSB. Also, the method of reading the OSD font does not change. That is,
O from L ₁ to L ₁₈ based on the first OSD font
SD fonts are scanned continuously.

Further, the left side and the right side of the dot matrix are defined as standard, and are defined as a second mirror image position in FIG. 2B.
Turn over the top and bottom sides of. Dot matrix MS
While B and the LSB does not change from each other, reading method of OSD font that continuously scans the OSD font from L ₁₈ to L ₁ on the basis of the first OSD font is replaced.

Further, the left side and the right side of the dot matrix are exchanged, and the top side and the bottom side of FIG. 2B defined as the third mirror image position are turned over. Dot matrix MSB and L
Replace SB. That is, D12 is switched to D1 for the MSB, and D1 is switched to D12 for the LSB.
On the basis of the first of the OSD font OS from L ₁₈ to L ₁
Exchange the reading method of the OSD font for scanning the D font.

As a result, each OSD font has four dimensions in two dimensions.
Since there are four positions and each position includes four rotation angles, 16 (4 × 4) kinds of rotation OSD fonts are formed. This makes it possible to reduce the number of duplicate OSD fonts formed by rotating OSD fonts such as "b", "d", "p", and "q".
The cost of the memory for storing the D font can be reduced.

In a preferred embodiment of the invention, the decoder
Read 12x18 dot ideographic character "P" to be decoded
In this case, based on the basic principle shown in FIG.
It is placed at 90 ° clockwise. CPU 306
Therefore, if a 90 ° clockwise position is recognized,
For example, the sixth line 220, ie, all 12 OSD fonts
Since the columns are read by the decoding processing element at the same time,
The sixth row 2 by operating the scan controller
20 and selectively output to the shift register 316.
You can help. That is, L₆By B₆Is line 6
Select 220 dots and D₁₈To D₁Dot up to
Can be transferred continuously to form sixth row 220
You. Similarly, the other rows of the dot matrix
Is done. Finally, from the first line 216 of the ideographic character "P"
Twelve lines are displayed. Similarly, defined as the mirror image position
The left and right sides of the dot matrix in FIG.
You. L ₆By B₆Selects the dot in the sixth row 220
And change these dots to D₁₈To D ₁Continuously transferred to
Thus, the sixth row 220 can be formed.

In a preferred embodiment of the present invention, when the decoder reads out the 12 × 18 dot ideographic character "P" for decoding, the display device will rotate 90 degrees counterclockwise based on the basic principle shown in FIG. 2D. ° placed. CP
When the 90 ° counterclockwise position is recognized by U306, for example, the sixth row 224, that is, all 12 columns of the OSD font are read simultaneously by the decoding processing element. Decode the sixth row 224 and put it in shift register 3
16 can be selectively output. In other words,
With L ₆ , B ₆ can select the dots in the sixth row 224 and successively transfer these dots from D ₁₈ to D ₁ to form the sixth row 224. Similarly, other rows of the dot matrix are formed. Finally, the first line 222 to the twelfth line of the ideographic character "P" are displayed. Similarly, the left side and right side of the dot matrix of FIG. 2D defined as the mirror image position are exchanged. By L _6, B ₆ sixth
The dots in row 224 can be selected and these dots can be sent continuously from D ₁ to D ₁₈ to form a sixth row 224.

In a preferred embodiment of the present invention, when the decoder reads a 12x18 dot ideographic character "P" for decoding, it can be clockwise or counterclockwise 180 based on the basic principle shown in FIG. 2E. The display device 322 is arranged at the position of °. When the CPU 306 recognizes a clockwise or counterclockwise position of 180 °, for example, the sixth row 230, that is, all 12 columns of the OSD font are read simultaneously by the decoding processing element, so that scanning is performed. The sixth row 230 is decoded by operating the controller and the
16 can be selectively output. In other words,
By L _6, B ₁₂ is selectively transferred dots (1,6) to D _12, is the same for the remaining lines, selective B ₁ by L ₆ is a dot (12,6) to D ₁ To form a sixth row 230. In the same way, other lines of the ideographic character "P" are formed. Finally, the first to eighteenth line 230 of the ideographic character "P" is displayed. Similarly, the left and right sides of the dot matrix of FIG. 2E defined as mirror image positions are exchanged. With L ₆ , B ₁₂ can selectively transfer dot (1, 6) to D _1, and so on for the remaining lines, and with L ₆ , B ₁ becomes dot (12, ₆ ) To D ₁₂ to form a sixth row 230.

Referring to FIG. 5, there is shown a flowchart 500 illustrating the rotation of an OSD font. In the start step 502, an OSD display request is sent to a CP such as an MCU or a DSP.
Since the control signal is input to the U306, the control signal generated by the CPU 306 is transferred to various elements of the OSD rotation device, and the execution of the OSD font reading process starts.

In step 504 of reading the OSD font, the font address generator 308 generates a font address corresponding to a desired OSD font based on a signal from the CPU 306. The OSD rotator uses the signal generated by the synchronization generator 304 as a reference signal. Here, the synchronization signal may coincide with the start time of the OSD display in order to synchronize the rotated OSD font with the display of the video. Next, the OSD font address is stored in a memory such as a static access memory (SRAM). Desired OS selected from OSD font ROM
The D font is determined based on the font address.

In the step 506 for determining the rotational position, CP
After U306 receives the OSD font rotation request, the process determines whether display device 322 has been rotated. If the answer to the query is negative, the process proceeds to step 518. Here, since the image is displayed at the position of 0 °, the OSD font is directly input to the display device. If the answer to the query at step 506 is positive, step 506 proceeds to step 510. here,
The OSD font is decoded by the decoder because the video can be displayed at various positions, for example, 90 ° clockwise, 90 ° counterclockwise, clockwise, or 180 ° counterclockwise.

FIG. 2C shows the principle of displaying an image at a 90 ° clockwise position. In the example of the sixth row 220,
All twelve lines of the OSD font are successively read into the decoding elements of the first to twelfth lines. The sixth row 220 is scanned via the scan controller to perform a decoding process, and the shift selector 3 is output by the output selector.
16 is output.

FIG. 2D shows the principle when the image is displayed at a 90 ° counterclockwise position. In the example of the sixth line, all 12 lines of the OSD font are continuously read into the decoding processing elements of the first to twelfth lines. The sixth row 224 is scanned through the scan controller to perform a decoding process, and the output selector selects the shift register 3.
16 is output.

FIG. 2E shows the principle in the case where the image is displayed at 180 ° clockwise or counterclockwise. In the example of the sixth row 230, all 12 OSD fonts are used.
The columns are sequentially read into the decoding elements of the first to twelfth columns. The sixth through the scan controller 404
The row 230 is scanned and decoded, and output to the shift register 316 by the output selector.

Step 512 of storing a rotated OSD font
Then, the rotated OSD font decoded by the decoder is converted into the serial data type,
6 and are provided to the output circuit 320 in order.

In step 516 of outputting the OSD font in addition to receiving the attributes of the OSD font colors such as red, blue, and green and the background color, the output circuit 320 as an output device performs data conversion to perform the rotation font rotation. To the display device 322. In other words, the digital signal of the OSD font is converted to an analog signal and sent along with the font attributes to various standard interface cards on various display devices.

In the output control step 514, the output controller 316 controls the O based on the control signal from the CPU 306.
This device controls the output priority of the SD font.

In the display step 518 of the OSD message,
Display device 322 such as CRT display, TV, LCD, etc.
Receives and displays the OSD font and other related attributes supplied to the output circuit.

The apparatus and method of the present invention for suitably displaying OSD messages and images by rotating the on-screen display font will be briefly described. Further, in the present invention, O
Since SD fonts are read on a font basis,
The processing time for rotating an SD font is considerably shorter than the time for rotating a conventional OSD rotated font in a bitmap. Further, by using various rotation angles of the OSD font, the number of duplicate OSD fonts can be significantly reduced.

As will be appreciated by those skilled in the art,
The above preferred embodiments of the present invention are not limiting of the present invention. The present invention is intended to cover various modifications and similar arrangements that fall within the spirit and scope of the appended claims. The scope is to be interpreted in a broad sense, and encompasses all the modifications and similar configurations.

[Brief description of the drawings]

FIG. 1A is a diagram showing a relationship between a conventional OSD message after rotation of a display device and display of an image, and FIG.
FIG. 7 is a diagram showing a relationship between an OSD message after rotation of the display device of the present invention and display of an image.

2A to 2E show the basic principles of the present invention for rotating OSD fonts.

FIG. 3 is a system block diagram illustrating rotation of an OSD font according to the present invention.

FIG. 4 is a diagram of a decoder according to the present invention.

FIG. 5 is a flowchart illustrating rotation of an OSD font according to the present invention.

Claims (26)

[Claims] 1. A plurality of OSDs are received by receiving an OSD display request and a central processing unit (CPU) generating a control signal.
A CPU for controlling the rotation of the SD font; a CPU connected to each of the CPU and a synchronization signal generator; receiving a reference signal and the control signal from the synchronization signal generator to generate a plurality of OSD font addresses; A font address generator; a memory connected to each of the CPU and the font address generator for storing the plurality of OSD font addresses; a memory connected to each of the CPU and the memory to store the plurality of OSD font addresses. Font read-only memory (ROM) for supplying the corresponding OSD font
And a decoder connected to each of the CPU and the font ROM for continuously rotating the plurality of OSD fonts to rotate the OSD font to generate a plurality of rotated fonts; and receiving the rotated fonts. An output unit connected to each of the decoder and the CPU and configured to convert the data format of the rotated font; an output circuit connected to the storage medium and forming an OSD message; and An output controller connected to each of the CPUs for controlling a display sequence; and an output controller connected to the output circuit for displaying the OSD message and synchronizing the display of the video and the OSD message on the display device. On-screen display (O) including the output unit including a display device for performing display D) device for rotating the font. 2. The decoder, comprising: a plurality of decoding processing elements that receive the control signal and execute a decoding process; and each of the plurality of decoding processing elements and the synchronization generator are connected to each other. 2. The image processing apparatus according to claim 1, further comprising: a scan controller that controls a scan sequence during the decoding process; and an output selector that is connected to each of the plurality of decoding processing elements and the CPU and selects the output priority of the rotated font. OSD as described. 3. The OSD of claim 2, wherein each of said decoding processing elements comprises a plurality of channels, respectively. 4. The OSD according to claim 2, wherein the scan controller has a plurality of channels. 5. The OSD according to claim 2, wherein said output selector comprises a plurality of channels. 6. The scan controller according to claim 1, wherein said scan controller comprises an X axis and a Y axis.
3. The OSD of claim 2, comprising one scan selection selected from the group consisting of axes. 7. The OSD of claim 2, wherein said output selector comprises each of said fonts output from LSB to MSB. 8. The OSD of claim 2, wherein said output selector comprises each of said fonts output from LSB to MSB. 9. The synchronized display forms the video display and the synchronized display of the OSD message such that an appropriate view is obtained when the display device is at a 0 ° position. First OSD to perform
A font position and a second for forming the synchronized display of the video display and the OSD message such that an appropriate view is obtained when the display device is at a 90 ° clockwise position. When the OSD font position and the display device are at 90 ° counterclockwise,
A third OSD font position to form the display of the video and the synchronized display of the OSD message so that an appropriate view is obtained; and when the display device is at a 180 ° clockwise position. ,
2. The system of claim 1, further comprising a position selected from the group consisting of a fourth OSD font position for forming the display of the video and the synchronized display of the OSD message to obtain an appropriate view. OS described
D. 10. The system of claim 9, wherein each of the OSD font positions comprises a position selected from a group consisting of a first mirror position, a second mirror position, and a third mirror position.
OSD as described. 11. The OSD of claim 1, wherein said font ROM used to store said OSD font is a font-based storage device. 12. The OSD according to claim 1, wherein the font ROM from which the OSD font is read is a font-based reading device. 13. The display device is a cathode ray tube (CRT).
The OS according to claim 1, further comprising one selected from the group consisting of a display and a liquid crystal display (LCD).
D. 14. An OSD display request for instructing a CPU to start reading a plurality of OSD font addresses, the plurality of OSD font addresses corresponding to the plurality of OSD font addresses stored in a memory. Generating a font, reading the OSD font corresponding to the plurality of font addresses, and sending the plurality of OSD fonts to a decoder, wherein the plurality of OSD fonts are initially stored in a font read only memory (ROM). Storing the plurality of rotated fonts in a storage medium by performing a decoding process on the OSD font to form a plurality of rotated fonts; and storing the plurality of rotated fonts in a storage medium. A step of continuously outputting the rotated font to an output circuit; Displaying an OSD message including the rotated font on a display device such that the OSD message has a synchronized display. 15. The decoding process uses a scan controller that performs a decoding process using a plurality of decoding processing elements based on a control signal and receives a synchronization signal from a synchronization generator during the decoding process. 15. The OS according to claim 14, further comprising controlling a scan sequence, and selecting an output priority of the rotated font using an output selector.
D. 16. The OSD of claim 15, wherein each of said decoding processing elements performing said decoding processing comprises a plurality of channels. 17. The OSD according to claim 15, wherein the scan controller that controls the scan sequence has a plurality of channels. 18. The OSD according to claim 15, wherein said output selector for selecting said output priority of said rotated font comprises a plurality of channels. 19. The OSD of claim 15, wherein said scan controller comprises a scan selection selected from a group consisting of an X axis and a Y axis. 20. The output selector according to claim 1, wherein said output selector is MSB to LSB.
16. The OSD according to claim 15, comprising each of the fonts output to the OS. 21. The output selector according to claim 1, wherein the output selector selects MSB to LS
16. Each of the fonts output to B.
OSD as described. 22. The synchronized display, wherein when the display device is at a 0 ° position, the synchronized display of the video display and the OSD message is formed such that an appropriate view is obtained. First OSD to perform
When the font position and the display device are at 90 ° clockwise,
A second OSD font position for forming the display of the video and the synchronized display of the OSD message to obtain an appropriate view; and the display device is at a 90 ° counterclockwise position. When
A third OSD font position to form the display of the video and the synchronized display of the OSD message so that an appropriate view is obtained; and when the display device is at a 180 ° clockwise position. ,
11. The system of claim 10, further comprising a location selected from the group consisting of a fourth OSD font location for forming the display of the video and the synchronized display of the OSD message to provide an appropriate view. OS described in 14
D. 23. The OSD of claim 22, wherein each of the OSD font positions comprises one selected from the group consisting of a first mirror image position, a second mirror image position, and a third mirror image position. 24. The step of reading an OSD font using a font-based reading device.
OSD as described. 25. The method of claim 14, wherein the step of storing a font address utilizes a font-based storage device.
OSD as described. 26. The OS according to claim 14, wherein the step of displaying the OSD message uses a display device selected from the group consisting of a CRT display and an LCD.
D.