JPS6180690A - Digital disk and digital disk record reproducing device - Google Patents

Abstract

PURPOSE:To judge easily whether or not picture data, which can be displayed, is recorded at the disk and to display suitably in accordance with the recording/ non-recording condition by recording identifying information showing presence or absence of picture display data which can compose essentially a picture, out of picture data recorded by using sub-code data. CONSTITUTION:When the reproduced data is a picture display mode (TV mode or LINE mode), processing in accordance with the data. For example, when an instruction write a font on the screen is reproduced, the picture data is written in a graphic video RAM 122 by using a video RAM control circuit 121, and hen the data is a ZERO instruction, operation on the screen will be never executed. On the other hand, when the reproduced data is ZERO mode data, an data reading address supplied through the video RAM control circuit 121 to ROM 123 for displaying a picture, and a data writing address supplied to a graphic video RAM 122 are reset and an initial action is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a digital disc, such as a CD (optical compact disc) system, which can record image data together with audio data, and a digital disc record playback device for the digital disc, and particularly relates to a digital disc record playback device for the digital disc record. Regarding display systems.

[Technical background of the invention]

Currently, some audio equipment employs a digital recording/playback method that makes full use of PcMVl* in order to achieve high fidelity playback and immersive operability. So, to explain this using the CD system as an example, this is a disk made of a transparent resin sheet with a diameter of 121 mm and coated with a metal thin film that forms bits (irregularities with different reflectances) corresponding to digital PCM data.

Rotates using CLV (constant linear velocity) method! g Encourage me, is that it? The semiconductor laser and the optical conversion element are opened from the inner circumferential side to the outer circumferential side by optical pink-up using P:J wiping, and are reproduced in a linear tracking manner.

Here, the disc includes audio data for the defendant as well as subcode data for improving operability and realizing advanced functions. Then, this subcode data is divided into subcodes P, ?, and ? for each frame. Pcode Q
, is composed of 8-bit data called subcode 几 through subcode W. Of these, the subcode Q is called address data, and in the program area of the disc (radius range from 25 to 58 fi), each recorded song number (TNO), section number (INDEX), elapsed time (TIME) etc., and the lead-in area (radius 23 to 25
In the range of parrots), the start address of each song number is used as TOC (table op content) data. It is as shown. In other words, the subcode Q is recorded so that the search operation for selectively reproducing the desired data to be reproduced from the vast amount of recorded information recorded on the disc can be performed quickly and accurately. At the same time, it is also used as data for displaying operations. Furthermore, the subcode P is simply data representing only the 9th change of the above subcode Q 111M1, and is used in a simple playback device that does not have an advanced search function.

On the other hand, subcodes 17 to W, which are composed of 6 pits per frame, are not used on existing discs that only record audio data for playback, and are recently used as data for displaying images. This is being considered. In other words, this subcode data is intended to display an image on, for example, an RV screen in synchronization with audio data, and its specific structure and usage are currently considered as follows. There is.

In other words, the above image data is roughly divided into display image data in units called packs or image manipulation commands such as fi-screen scrolling, and each data consists of 144 (-24 x 6) bits as shown in Figure 3. be done. Here, symbol O is mode/item data and designates a display screen mode as described later. Also, symbol 1
is instruction data indicating the type of the image display data and image manipulation command, and symbols 4 to 19 are data for each command. Symbols 2, 3, and 20 to 23 are parity data generated by Reed-Solomon codes, and the reproducing apparatus uses this to perform error determination and error correction.

Here, the display screen mode designated by the symbol O is a TV (TV graph ink) mode.

There are three types of display: LINE (line graphic) mode and zE (Zero mode).The TV mode is a display such as an IT display where one screen consists of 288 x 192 pixels as shown in Figure 4 (a). This is a mode that assumes a device, and the LINE mode is as shown in Figure 4 (b).
), this mode assumes a simple display device, such as a liquid crystal, in which the 1lIij surface is composed of 288×24 dots of pixels. These screens are shown in Figure 4 (c
) The area is subdivided into 11 units of 6x12 dots called 7 onts.
8X167t:, y, LINk2 mode is 48X2
7 onts constitute the X= surface.

The display image data for each pack mentioned above is this one.
The data corresponds to 7 onts, and data for each pixel in the font is stored in the data area (5×12 bits) of symbols 8 to 19 shown in FIG. Therefore, for example, when displaying in TV mode, it is necessary to record 768 (-48×16) packs of data on the disk to configure one screen. Also, one pack of data is recorded at a cycle of approximately 3nhsec, and it takes 2.3 sec (75f3 x 3 msec) to display one screen.
ec ;) time is required. In addition, in TV mode, the 16 pre-selected color palette allows for subtle expressions such as neutral colors, complex colors, and color changes.
It is now possible to display vivid colors. Similarly to this 1. Eight-color image display is possible in INEN-mode. Also, among the above display screen modes, the Zg 0 mode is the N0P (NO0p) mode that does not affect the screen currently being displayed.
eration) mode, and therefore, this zgao mode data will be recorded on the subcode 几~W of a disc that does not record a single image on the floor, just like existing discs.

On the other hand, as described above, the back data in fv mode and LINE mode contains an image manipulation command other than the display image data.The type of the command is indicated by the instruction 71 data of symbol 1. The above image manipulation commands include scrolling commands for the entire screen (commands for moving the entire screen horizontally or vertically), scrolling commands for only a specific row or column, or greasy commands for filling the entire screen with one color by 31aD. There are t-screen commands and the like, and by combining these commands, it becomes possible to construct visually varied and effective screens.

(-Problems with the R-viewing technology) However, in digital disc record playback equipment that targets discs on which such image data is recorded, the display format is freely controlled according to the recording state of the image data. Therefore, it is necessary to have advanced display functions not found in conventional models, and in particular, it is required to enhance the control system.For example, the disc nub code 几~W currently on the market has All Z
Since it contains ER1O mode data, it is impossible to display images, and it is not guaranteed that all discs produced in the future will contain image data that can be displayed. Therefore, when playing these discs, a display will be displayed to inform you that no image data that can be displayed is recorded, or a predetermined display will be displayed instead to make effective use of the display for displaying images. It is desirable to have an n-th display.

[Purpose of the invention]

The present invention has been made in response to the above-mentioned technical demands, and provides a digital disc that can easily identify the presence or absence of displayable image data, and also provides a digital disc that can easily identify the presence or absence of image data that can be displayed on the disc. An object of the present invention is to provide a digital disc record playback device that determines whether a disc is recorded and displays an appropriate temperature in °C depending on the recording/non-recording state.

[Summary of the invention]

The present invention provides the above-mentioned TV mode or LI,
By recording identification information indicating whether or not image data that can be displayed in NE mode is recorded, and by reading and determining the identification information when playing the disc, the above-mentioned displayable image data is recorded. The display format is switched depending on whether data is recorded or not recorded.

[Embodiment of the Invention] An embodiment of a CD-type digital disc and digital disc record reproducing apparatus to which the present invention is applied will be described with reference to the drawings.

First, FIG. 1 shows a schematic electrical circuit system of a digital disc record reproducing apparatus according to this embodiment. In the figure, a control circuit (101) includes a microconverter, an interface circuit, etc., and by selectively operating keys of a keystroke group (102), R
, OM, controls the disc playback system (104) to a predetermined state according to the program stored in (103), and displays various displays as described below on the display section (105) and the ca'r display (106). It is something.

Therefore, in the disc playback system (104), the disc motor (108) and the pickup feed motor (109) are driven by the 1J control circuit (101) via the disc playback system control circuit (107), and the pickup (110)
When the laser diode of is turned on, the disk (1O)
The data recorded on the VC is reproduced by the pickup (110), and the reproduced signal is sent to the tF signal detection circuit (11).
2). This RE' signal detection circuit (112) separates the detected RF signal into a signal supplied to the servo circuit (113) iC and an E=FM signal supplied to the demodulation circuit (114). Here, the servo circuit (113) sends out signals for applying focus servo and tracking servo to the pickup (110), and also sends out signals to the pickup feed motor (109) from the disk writing system control circuit (107). Combined with the control signal from the servo, it sends out the I-signal signal which makes the linear tracking servo work. Also, the demodulation circuit (↓13) is used for tFΔ1 signal and waveform shaping! Jk'M (keyed to i, from this, the synchronization number 15, which becomes the tape code data, is divided into sections, and the synchronization number 15 of -7 is sent to the subcode Q detection circuit (115) and the subcode 几~
In addition to supplying the W detection circuit (116), the 1d signal from which the synchronizing signal has been separated is supplied to the D/A conversion circuit (117). The reproduced signal returned to an analog signal by the D/A conversion circuit (117) undergoes necessary error correction.

The speaker (118
) is used to drive the sound. Furthermore, in the case of the 'roc data in the lead-in area, the subcode Q detected by the subcode detection circuit (115) is detected by the control circuit (115).
01), and is used to perform necessary control functions such as a search function, and if it is address data of a program area, display output control is performed from the control circuit (101). Circuit (120)
T'NO or TI to the Office of Publication (tOS) via
It is used to make necessary displays such as MJ3.

On the other hand, the image data of the subcode ~W detected by the subcode ~W detection circuit (116) is transmitted to the control circuit (101).
) and the video ram control circuit (121) to a predetermined address in the graphic video ram (122) circle. In addition, this graphic video ram (122)
The various display screen modes have been reconsidered, and those having the capacity of 192 to 256 are used. In addition, the m-image display general OM (123) is one in which data for a predetermined image pattern is recorded, and the data is displayed graphically via the training circuit (tog is a video ram?61J control circuit (121)). The TV double signal generation circuit 124) reads out the image data in the graphic video RAM (122), and also outputs signals such as a screen synchronization signal and an I horizontal synchronization signal. is added to generate a 'r v llii screen display signal, which is supplied to the CRT display (106). Here, the control circuit (101) reads the image data in the second graphic video camera (122) by supplying a predetermined control signal to the video RAM control circuit (121), and displays the image data on the C-T display (106). The 5R function is to freely control the image.

Therefore, the disk (111) used for convenience in this actual example includes:
#JI allows you to virtually compose images! ! Identification information indicating whether there is display data, that is, image data of TV mode or LINfu mode, is recorded. Here, a row of 7 formats containing the identification information is shown below. First, according to the pack data groove bottom of the length code data shown in Figure 3, the symbol O is the mode/item data, and the symbol 1 is the instructor. 1 data, symbol 4
The following shows each execution data. Here, according to the currently considered configuration, when the mode data is set to 'rv mode, all of that data has meaning, and data t-, which does not cast any shadow on the screen, ta
If you want to record it, just set the mode data to '1iELU mode. The instruction data indicates the type of each instruction, and can be divided into 2'-64 instructions per km, but the currently considered instructions are at most 15 degrees and 5 dX, and new instructions can be added. It is. Therefore, it is only necessary to newly add an l-O instruction (an instruction that does not affect the ljJJ plane, for example, set all instruction data to O) as one of the instructions. That is, T
When recording image data on a disk using V mode, all mode data should be in 'rv mode, and if you want to keep the screen midway through, you can record the 'l[' ZIO command of V mode. . In addition, discs that do not record image data or existing discs are not compatible with the current format.
Record using only mode data. Therefore, by determining as described above, it is possible to easily distinguish between a disc on which image data is recorded and a disc on which no image data is recorded after the disc is played back. In other words,
In this case, in order to determine the presence or absence of the above image display data during disc playback, the presence or absence of Z hi f (, O mode data is checked. In addition, the zgao command can be added to the LINW mode as well as the LINhi mode.

Note that as another method of recording the identification information, it is also possible to record data dedicated to identification of the deceased bit as part of the TOC data. Normal playback systems automatically read the 'roc data when a disc is inserted, so if identification information is added to the 'l゛OC data, the presence or absence of image display data can also be immediately determined. You will be able to do it.

Next, the control function that characterizes the digital disc record playback device of this embodiment will be explained based on the configuration shown in FIG. In other words, by reading and determining the identification information recorded on the disk mentioned above, an appropriate display is made in either case, and this operation is performed by the microcombiner in the control circuit (lOl). Automatically controlled by Eta. A flowchart of the display mode switching execution program stored in the ROM (103) for driving the micro combinator is shown in FIG. 2, and will be explained below.

First, the micro combinator in the tlfjl 4 circuit (101) is the subcode R-W familiarization circuit (116) t''
The subcode data reproduced from the disk (111) is read at a glance, and the type of data is recognized. (Step ■) Occasionally, when the data is reproduced at t, the -ta/bear information is recognized in the data D image display. Note that this assumes the drawing method data to which the above-mentioned zgao command has been added, and in this case, the mode/item data of symbol 0 is recognized as the painter display data presence/absence information. That is,
If the recognized data is 1fLO mode data, it means that there is no image display data. (Step ■) Therefore, if the reproduced data is not available in the image display mode ('rv mode or LINg mode), processing corresponding to the data is performed. For example, if a command to check the font is played on the screen, the image data is transferred to the graphic video ram (121) using the video ram control circuit (121).
122). Further, if the data is the above-mentioned ZE 0 command, no operation on the screen is executed.

(Step ■) On the other hand, if the reproduced data is Zlu 0 mode data, the following processing is performed. First, 1. ! jIM! 70tV for display
The data read address supplied to (1o) and the data write address supplied to the graphic video RAM (122) are reset to perform an initialization operation. (Step ■) Next, data corresponding to the set read address is read from the image end display module OM (123) in which predetermined image data is stored in advance, and the data is read out from the set oath. A video ram control circuit (121) is connected to a graphic video ram (122) corresponding to the embedded address.
Insert it using. (Step p) Increase the above-mentioned expression protrusion/injection address and set it as the address to be processed next. Perform readings, readings, and oaths in one-to-one correspondence, and all j-
Evening is 11! I11 ton display 1 (, OM (123), repeat the above steps (■ to -0) until the thread starts. (Step ■) In other words, by following the above steps, the identification station If it is determined that the lotus display data is not recorded, a predetermined image pattern prepared in advance (-j indicates that the image display data is not recorded). The artist who informs you) will be displayed.

Therefore, in this embodiment, by recording the identification information on the disc and recognizing it during playback, it is possible to easily and automatically determine whether or not displayable image data is recorded. Furthermore, is it possible to consider writing the above distinction clearly on the label of discs that will be produced in the future?
This cannot be distinguished with existing discs, and in devices where multiple discs are set in a playback device such as a commercial karaoke playback device, it is difficult to check the distinction from the label surface, and the disc is automatically recognized when playing the disc. It is effective to determine the Furthermore, when playing a disc that does not include artist display data, the information displayed on the screen informs you of the situation, that is, what kind of disc it is, so that the failure to display 5-screen data can be mistakenly recognized as a malfunction. This can help avoid problems, which in turn leads to improved reliability.

Furthermore, if a pattern, such as a pattern in which the color of the entire screen changes at regular intervals, is displayed as an image pattern stored in the image display ROM (123), it will be possible to create an atmosphere in the place where this playback device is installed (for example, a karaoke bar, etc.). It will also happen.

In addition, in the above embodiment, when it is determined that there is no displayable image data recorded, the image data prepared in advance is displayed on the display, but this is not limited to the display unit of the main body of the playback device. (105) may be provided with a display that indicates the presence or absence of image data that can be displayed, and the display may be controlled based on the judgment regarding the identification information1. 12
3) If it is made interchangeable, its uses will be expanded, and conversely, if a simple image display is sufficient, R,OM (103) may be used as a storage location for the image data. The means for realizing the present invention are not limited to those described above and illustrated, and various modifications and applications are possible, allowing application of a wide range of means.

[Effects of the Invention] As explained above, the digital disc and digital disc record playback device of the present invention can easily determine whether displayable image data is recorded on the disc, and can determine whether displayable image data is recorded on the disc or not depending on the recording/non-recording status. Appropriate display can be made.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram showing an electric circuit system in an embodiment of a digital disc record playback device according to the present invention, FIG. FIG. 4 is an explanatory diagram for explaining the conceptual configuration and display screen mode of the subcode W in the technical background of the present invention. 101...Control circuit, 104...Disc playback system, 111...Disc, 116...
...Subcode 几~W detection circuit, 121...Videom control circuit, 122...Graphic video ram, 123...1-LOM for song display, 124...
...TV signal generation circuit.

Claims (2)

[Claims] (1) In a digital disc in which audio data and subcode data synchronized with this audio data are digitized and recorded, the subcode data is used to substantially constitute an image among the recorded image data. A digital disc characterized by recording identification information indicating the presence or absence of image display data that can be displayed. (2) a reproducing means for reading each of the data from the digital disc; a determining means for determining the presence or absence of the image display data based on the identification information read by the reproducing means; and a determination result of the determining means. 1. A digital disc record playback device comprising: a display means for displaying a corresponding display; and a switching means for switching the display format of the display means according to the determination result.