KR0141108B1 - Compact disc graphic equipment and reproducing method to enhance screen scroll performance - Google Patents

Abstract

The present invention relates to a compact disc graphics device and method for improving a scroll screen for converting a television scanning method when performing a scroll command in an optical disc player. The present invention relates to a digital disc data output from a CD separated into audio data and subcode data. A signal processor, an image memory unit for storing information about an image, a display unit for displaying an image, and the subcoded data output from the digital signal processor are interpreted and stored in the image memory, and the graphics processed data are read out. In the CDG system having a CDG processing unit for displaying; The CDG processing unit interprets the subcode data command from the digital signal processing unit, and generates an interlaced / sequential scan switching control signal if the command is a scroll command, and does not generate a signal if the command is a scroll command; A synchronization signal generation unit for generating a synchronization signal that causes the scanning method to be a scanning method and if the signal is not generated, and a processor for converting sub data into graphic data in synchronization with the synchronization signal generated by the synchronization signal generation unit; By providing a natural operation of the screen when performing the scroll command can increase the visual effect of the viewer.

Description

Compact disc graphics device and method for scrolling screen enhancement

1 is a diagram showing the data format of a subcode.

2A and 2B show data formats relating to a soft scroll screen.

3 is a block diagram of a compact disc graphics device according to the present invention.

FIG. 4 is a diagram showing the configuration of the image memory section shown in FIG.

5 is a flowchart of a method for improving a scroll screen according to the present invention.

6 is a flowchart showing another embodiment of a method for improving a scroll screen according to the present invention.

FIG. 7 is a diagram illustrating a data format for performing FIG. 6.

* Description of the main parts of the drawing

302: digital signal processing unit 303: CDG processing unit

306: Processor

The present invention relates to a compact disk graphic apparatus and method for improving a screen according to a scroll command in an optical disk player, and more particularly to a compact disk graphic apparatus and method for converting a scroll screen to convert a television scanning method when a scroll command is executed. It is about.

The compact disc method refers to a method of recording binary information in the form of a concave pit on a disc having a diameter of 12 cm, irradiating high quality light such as a laser, and detecting the binary information as the intensity of the reflected light.

The compact disc method includes a compact disc for recording audio information, a compact disc video (CDV) for recording audio information and video information (movie), and a compact disc graphic (CDG) for recording audio information but still video information (still image). ).

According to the present invention, a scroll is performed during an instruction of an subcode area in a compact disk graphic (hereinafter referred to as CDG) for recording still picture information in a subcode area attached to each frame for recording audio information. It is about command execution.

In general, since CDG records still image information in a sub code area, a non-interlaced method (NON INTERLACE), that is, a sequential method, is used for TV scanning in reproducing image information. That is, the image information reproduction sequentially reproduces still images to provide a clear and clear screen. In this case, if the TV scanning method is interlaced, the quality of the screen is reduced, such as overlapping the screen. However, the scroll command among the graphics mode commands is still, but because it requires the movement of the screen, the user sees a visual effect such as watching a fairy tale. When the TV scan method is a non-interlaced method (that is, a non-interlaced method), that is, a sequential method is used, the pixels on the screen are not clear and blurred.

Accordingly, an object of the present invention is to use the TV scanning method as a sequential method (NON INTERLACE) when reproducing the video information for a command other than the scroll command among the commands of the video information recorded in the subcode area in the CDG, and the video information for the scroll command. The present invention provides a compact disc graphics device for converting a TV scan method into an interlaced scan to improve a scrolling screen that is a still image but a moving screen.

Another object of the present invention is to provide a compact disc graphic control method for improving a scroll screen by generating an interlaced scan / sequential scan switching signal for converting a TV scanning method in the scroll screen improving apparatus.

In order to achieve the above object, the present invention provides a digital signal processing unit that separates and outputs data read from a compact disc into audio data and subcode data, and an image storing information on an image to be displayed on a compact disc graphic (CDG). CDG system including a memory unit, a display unit for displaying an image, and a CDG processing unit for interpreting the subcode data output from the digital signal processing unit and storing the graphic processed data in the image memory, and reading and displaying the stored data. To

The CDG processing unit

The digital signal processor interprets the instruction (INSTRUCTION) of the subcode data, and if the command is a scroll command, generates an interlaced scan / sequential scan switching control signal, and if not the scroll command does not generate an interlaced scan / sequential scan switching control signal. Command interpretation unit;

Synchronization that causes the television scanning method to be interlaced when the interlaced scanning / sequential scan switching control signal is generated from the command interpreter, and causes the television scanning system to be progressive scanning when the interlaced scanning / sequential scanning switching control signal does not occur. A synchronization signal generator for generating a signal;

And a processor for converting the sub data into graphic data to be displayed on the display unit in synchronization with the synchronization signal generated by the synchronization signal generator.

In order to achieve the above object, a digital signal processing unit which separates and outputs data read from a compact disc into audio data and subcode data, and an image memory unit which stores information about an image to be displayed on a compact disc graphic (CDG). And a CDG processing unit for displaying an image, and a CDG processing unit for interpreting the subcode data output from the digital signal processing unit and storing the graphic processed data in the image memory and reading and displaying the stored data. In the display control method for displaying the output of the CDG processing unit on the display unit,

A first judging step of reading whether the instruction moves the screen from the subcode data input to the processor;

A second judging process of determining a movement of a screen when the scroll command is made in the first judging process;

A first display control process of generating a synchronization signal for causing the television scanning method to be an interlaced scanning method when the screen is moved in the second determination process so that the output of the processor is displayed on the display unit in synchronization with the synchronization signal; ;

A second display control process of generating a synchronizing signal for causing the television scanning method to be a sequential scanning method so that the output of the processor is displayed on the display unit in synchronization with the synchronizing signal when there is no screen movement in the second determination process; Before describing the present invention, the data format of the CDG will be described with reference to FIG. 1 to help understand the present invention.

In the CDG, an area in which signals called subcodes are recorded is set for each frame for recording audio information. This subcode consists of eight subcode bits and each collection of bits constitutes eight channels represented by P, Q, R, S, T, U, V, and W, respectively. In the CDG, the P and Q channels usually contain information for finding the progress of each song, such as the absolute time of the compact disc, the relative time of each song, the track number, and the starting point of the song. Video information is recorded using 6 channels from R to W. The group of six bits from the R channel to the W channel is called a symbol (SYMBOL), and 98 symbols are gathered to form one block. The first two of the 98 symbols are used as the synchronization signals S0 and S1, and constitute one pack as 24 symbols. In addition, four packets constitute one packet (PACKET).

Twenty-four symbols constituting each pack will be described by referring to symbol- 0 to symbol-23.

Symbol-0 represents a combination of MODE-ITEM with three bits, called MODE, and three bits, called Item, which specifies the graphics usage. The symbol-1 following the symbol-0 is called an instruction and indicates the type of data field, that is, the form of the instruction. Symbol-2 and Symbol-3 consecutive to Symbol-1 are the error correction codes for Symbol-0 through Symbol-3. Symbol-4 to Symbol-19 after Symbol-3 are data fields, and Symbol-20 to Symbol-23 are error correction codes for protecting pack information.

The following MODE-ITEM combination is shown in Table 1.

The zero mode indicates that there is no image information. The data fields of the pack are all zeros. The line-graphics mode is for providing a character and graphic screen of 288 (horizontal) x 24 (vertical) pixels. The TV-graphics mode is for providing a character and graphic screen of 288 (horizontal) x 192 (vertical) pixels.

Table 2 shows the types of the eight commands used in the TV-graphics mode.

2A and 2B show data formats for soft scroll screen presets and soft scroll screen copying.

With reference to the accompanying drawings will be described in detail with respect to the present invention.

First, Figure 3 shows a block diagram of a CDG system including a CDG processor 303.

3 includes a digital signal processor 302 for reading data from the CD 301, a deinterleave unit 304 having an input terminal connected to an output terminal of the subcode data of the digital signal processor 302, and a digital signal processor 302. An error correcting unit (ECC) 305 which connects an input terminal to an output terminal of the interleave unit 302, a command interpreting unit 307 which connects an output terminal of the error correction unit (ECC) 305 to an input terminal, and a command analyzing unit An input terminal is connected to the data output terminal of the synchronous signal generator 308 which connects an input terminal to the interlaced scanning / sequential scan switching signal output terminal of 307, and to the output terminal of the synchronous signal generator 308. An input terminal is connected to a command execution unit 309 connecting another input terminal, an image memory unit 311 storing graphic data of the command execution unit 309, and a graphic data output end of the command execution unit 309. Table in which another input terminal is connected to the output terminal of the synchronization signal generator 308 It comprises a portion (310).

In FIG. 3, the digital signal processing unit 302 separates the data read out from the compact disc 301 into audio data and subcode data according to the channel and outputs the data. In this way, the data output from the digital signal processing unit 302 is applied to the deinterleave unit 304 to deinterleave the interleaved data at the time of recording, and then encoded in the subcode by an Error Correction Code (ECC). The error correction according to the corrected error correction code is performed and converted into graphic data in a form for processing by the processor 306. The graphic data referred to here has a form as shown in FIG. The processor 30 includes a command interpreter 307, a synchronization signal generator 308, and a command performer 309. The command interpreter 307 interprets the graphic data output from the error correction unit (ECC) 305 and outputs the graphic data necessary for command execution to the command execution unit 309. At this time, if the type of the command INSTRUCTION is a soft scroll screen command, an INTERLACE / NON INTERLACE switching control signal is generated. The switching control signal generated by the soft scroll screen command is input to the synchronizing signal generator 308, and the synchronizing signal at this time is a signal for synchronizing the TV scanning method to be interlaced. The signal output from the synchronization signal generator 308 synchronizes the command execution unit 309 and the display unit 310 with the TV scanning method of interlaced scanning. The command execution unit 309 performs graphic processing by synchronizing the graphic data input from the command analysis unit 307 with the synchronization signal generated by the synchronization signal generation unit 308. In performing this, the image memory section 311 is used. The image memory unit 311 stores information about an image to be displayed by the CDG.

FIG. 4 specifically shows the image memory section in the TV-graphics mode shown in FIG. The TV-graphics mode is for providing a character and graphic screen of 288 (horizontal) x 192 (vertical) pixels. Normally, graphic processing is processed in a unit called font (FONT) composed of 6 (horizontal) x 12 (vertical) pixels. Therefore, the number of fonts that can be displayed in the TV-graphics mode is 48 in the horizontal direction and 16 in the vertical direction, which is called a screen area. In addition, the top and bottom left and right of the screen area to implement a scroll (scroll) function has a spare of 1 font called a border area (BORDER area). Therefore, the screen area in the TV-graphics mode has a size of 50 (horizontal) x 18 (vertical). The image memory section 311 also stores an address for an image to be displayed in accordance with each command of graphic data as shown in FIG.

The data related to the soft scroll screen among the graphic data will be described.

2A and 2B show data related to 'soft scroll screen preset' and 'soft scroll screen copy', and data for controlling the scroll operation of the image memory unit 311 is loaded.

At this time, the 'soft scroll screen preset' command is a color designated by a four-bit color address stored in the T, U, V, and W channels of symbol-4 in fonts on the image memory unit 311, which becomes blank due to scrolling. The information on the screen disappears and the 'Soft Scroll Screen Copy' command fills the WRAP-AROUND fonts with the fonts in the image memory section that are scrolled and blank. That is, due to the change of the screen, the font located from the screen area to the border area is copied to the other border area to fill the blank space caused by scrolling, so that the information on the screen is repeated. In addition, COP-H and COP-V represent horizontal and vertical scrolling, respectively, and PH and PV represent horizontal and vertical shift pointers, respectively.

Here, an embodiment of a method of controlling the screen of the display unit 310 by generating the interlaced / sequential scan switching control signal for converting the TV scanning method from the command interpreter 307 shown in FIG. 3 will be described. same.

5 is a flowchart of a processor 306 for performing a method of controlling a compact disc graphic for scroll screen improvement according to the present invention. Steps 501 to 503 are a first determination process, and step 504 is a second determination process. Steps 505-506 are first display control procedures, and steps 507-509 are second display control procedures.

In FIG. 5, first, the command interpreter 307 of the graphic processor 306 initializes the counter (step 510), and inputs graphic data output from the error correction unit (ECC) 305, that is, From symbol-0, it is determined whether the current mode is the TV-graphics mode (step 502). If it is not the TV-graphics mode, the counter is determined (step 507). It is determined whether (INSTRUCTION) is a scroll (S503).

If the graphic data command is the scroll command, it is determined whether there is a change in the pointer (step 504).

If there is a change in the pointer, the command analysis unit 307 generates an interlaced scanning / sequential scan switching control signal (step 505) and applies it to the command interpretation 308 so that the synchronization signal generating unit 308 synchronizes with the interlaced scanning. After generating the signal and resetting the counter of the synchronization signal generator 308 (step 506), the process returns to step 502 to determine the TV-graphics mode. If there is no change in the pointer, the process returns to step 502 where the counter is again determined.

On the other hand, if it is not the TV-graphics mode in step 502, and the scroll command is not performed in the TV-graphics mode in step 503, if the pointer is changed in the TV-graphics mode and the scroll command is performed in step 504, the counter is It is determined whether or not the maximum time (step 507). Here, the maximum time (MAX TIME) refers to the maximum time until a scroll command occurs after a predetermined command occurs, and a means a period of reading a subcode from the CDG and transmitting it to the command interpreter 307. . That is, it is determined whether there is a scroll command within the MAX TIME after the execution of the predetermined command.

If the counter is less than or equal to MAX TIME, the time to read the subcode from the CDG and transmit it to the command interpreter 307, i.e., add (a) (step 508) to determine the next subcode to interpret the next subcode. The process returns to step 502. It is still interlaced. If the counter is larger than the MAX TIME, i.e., if the scroll command does not occur within the MAX TIME after the predetermined command is generated, the interlaced / sequential scan switching control signal is stopped (step 509). Be motivated.

6 shows another embodiment of a method of controlling the screen of the display unit 310 by generating an interlaced scanning / sequential scanning switching control signal for converting a TV scanning method.

Instead of determining the change of the pointer in the method shown in FIG. 5, scroll progress information is determined to control generation and stop of the interlaced / sequential scan switching control signal. Besides this process, the same method as shown in FIG. This scroll progress information can be encoded in a dummy data field from symbols -7 to -19 in the subcode in advance. S is encoded as the start of the scroll command, D as the duration of the scroll command, and E as the end of the scroll command. If S and D are active in the subcode instead of step 504, it means that there is a scroll command. Therefore, an interlaced scanning / sequential scan switching control signal is generated (step 605), and the counter is reset (step 606). Step E), if E is active, the counter is judged (step 607), and the subsequent procedure is as shown in FIG.

FIG. 7 illustrates an embodiment in which scroll progress information for performing the method illustrated in FIG. 6 is encoded in a dummy data field of a subcode. The scroll progress information is encoded in symbol-7 of the dummy data field.

As described above, the present invention generates a specific signal when performing the scroll command among the sub-code data in the compact disc graphic system to automatically adjust the scanning method of the TV, thereby increasing the visual effect of the viewer by naturally operating the screen during the scroll command. Can be.

Claims (5)

A digital signal processing unit for separating and reading data read out from the compact disc into audio data and subcode data, an image memory unit for storing information about an image to be displayed on a compact disc graphic (CDG), and a display unit for displaying an image And a CDG processing unit for interpreting the subcoded data output from the digital signal processing unit and storing the graphic processed data in the image memory, and reading and displaying the stored data. Analyzes the instruction of the subcode data from the signal processing unit, and generates an interlaced scan / sequential scan switching control signal if the command is a scroll command, and does not generate an interlaced scan / sequential scan switching control signal if the command is not a scroll command. part; Synchronization that causes the television scanning method to be interlaced when the interlaced scanning / sequential scan switching control signal is generated from the command interpreter, and causes the television scanning system to be progressive scanning when the interlaced scanning / sequential scanning switching control signal does not occur. A synchronization signal generator for generating a signal; And a processor for converting the sub data into graphic data to be displayed on the display unit in synchronization with a synchronization signal generated by the synchronization signal generator. A digital signal processing unit for separating and reading data read out from the compact disc into audio data and subcode data, an image memory unit for storing information about an image to be displayed on a compact disc graphic (CDG), and a display unit for displaying an image And a CDG processing unit for interpreting the subcoded data output from the digital signal processing unit and storing the graphic data in the image memory, and reading and displaying the stored data. A display control method displayed on a display unit, the display control method comprising: a first judging step of reading a command for moving a screen from subcode data input to the processor; A second judging process of determining a movement of a screen when the scroll command is made in the first judging process; A first display control process of generating a synchronization signal for causing the television scanning method to be an interlaced scanning method when the screen is moved in the second determination process so that the output of the processor is displayed on the display unit in synchronization with the synchronization signal; ; A second display control process of generating a synchronizing signal for causing the television scanning method to be a sequential scanning method so that the output of the processor is displayed on the display unit in synchronization with the synchronizing signal when there is no screen movement in the second determination process; Display control method of the compact disc graphics for scroll screen enhancement comprising a. The display control method of claim 2, wherein the movement of the screen is read by a change of a pointer in the second determination process. The method of claim 2, wherein the screen movement is determined by decoding the scroll progress information encoded in the dummy data field of the subcode in the second determination process. . The compact disc graphic of claim 4, wherein the scroll progress information comprises a code indicating a start of a scroll command, a code indicating a continuation of the scroll command, and a code indicating an end of the scroll command. Display control method.