JPS62250572A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To facilitate handling by identifying a channel number added to a picture extracting instruction in a picture signal obtained through the reproduction of a disk and displaying all the identified channel number. CONSTITUTION:When an inputted picture extraction instruction is a white font instruction, a microprocessor 24 reads a channel number from a color graphic picture data of one pack included with its instruction. The microprocessor 24 sets bits F0-Ff of a flag register corresponding to its channel number to '1' based on the read channel number. When the channel number extracted before is a channel number selected and set by a key switch group 27, the picture extraction instruction is executed and the channel number is displayed on a color CRT display device 32. Thus, which channel number is recorded on a disk 11 is recognized easily by the user and the handling is facilitated.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention is applicable to optical CDs (compact discs), for example.
The present invention relates to a 1fft disc playback system, and particularly relates to an improvement of an image display system using subcode data.

(Prior Art) As is well known, in the field of audio equipment, audio signals are converted into digitized data using PCM (pulse code modulation) technology in order to record and reproduce them with as high density and high fidelity as possible. Digital recording and reproducing systems that record information on a recording medium such as a disk or magnetic tape and reproduce it are now in widespread use. Among these, those that use a disk as a recording medium have a diameter of 1
Compact discs, which are 2 cm discs on which a bit string corresponding to digitized data is formed and read optically, are now the mainstream.

On the other hand, a disc playback device that plays back a compact disc as described above moves an optical pickup containing a semiconductor laser, a photoelectric conversion element, etc. in a linear tracking manner from the inner circumference side of the disk toward the outer circumference side. The data recorded on the compact disc is read by rotating the compact disc at constant linear velocity (CLV).

Here, in addition to digital audio data, subcode data for improving operability and realizing multifunctionality is recorded on the compact disc. This subcode data is P per frame (588 bits).
, Q, R, S, T, U.

It consists of 8-bit data called V and W.

Among these, the subcode data P is provided for distinguishing between songs and within a song, and for example, "1" represents an interval between songs,
“0” indicates the middle of the song. The above subcode data Q is called address data, and in the program area of the disc (radius 25 to 58IIIll), the song number (TNO) of the famous song recorded on the disc,
It shows the section number (index) and elapsed time, etc.
In the lead-in area (radius 23 to 25e) of the disc, there is TOC (Table of Contents) data indicating the start address of the famous song.

The other 6-bit subcode data R to W are currently displayed on the screen of a color CRT display, for example.
It is used to construct color graphics image data for displaying color graphics images. This color graphics image data is
Data is broadly divided into data that constitutes the image area of the font, and data for image operation commands to instruct, for example, to scroll the display screen, and each data consists of 6 bits and 24 symbols, as shown in factor 6. (This is called one pack).

Of these, symbol 0 is mode/item data and specifies a display screen mode, which will be described later. Further, symbol 1 is instruction data indicating whether the data constitutes the 1-font image area described above or the data of an image manipulation command. And symbol 4~
Reference numeral 19 denotes a data component that constitutes a one-font image area or constitutes an image manipulation command.

Note that symbols 2 and 3 and symbols 20 to 23 are error correction parity data Q and P generated by Reed-Solomon code, respectively, and this parity data Q
, P are used to perform data error determination and error correction.

Here, the display screen specified by the symbol O above -E -
1' d4. t, ZERO mode, LINE graphics mode, TV graphics mode, etc.

Among these, the TV graphics mode is for constructing one screen of color graphics images of 288 pixels (horizontal) x 192 pixels (vertical) on the screen of a color CRT display. In addition, the above LINE mode is 28
One screen is composed of 8 pixels (horizontal) x 24 pixels (vertical), and is used, for example, in a simple display device using liquid crystal.

As shown in FIG. 7, the 1-font image area is composed of 6 pixels (horizontal) x 12 pixels (vertical).

Therefore, the configuration of one screen in the TV graphic mode is as shown in FIG. 8, 48 fonts (horizontal) x
16 fonts (vertical), and the configuration of one screen in the LINE graphic mode is 48 fonts (horizontal) x 2 fonts (vertical), as shown in FIG.

The above-mentioned one pack of color graphics image data corresponds to an image area of one font, and each pixel ( 6X 12
It stores data for bits. Therefore, in order to construct one screen in the TV graphics mode, it is necessary to record 48 packs x 16 packs (768 packs) of color graphics image data on the disk.

In addition, one pack of color graphics image data is
In fact, data is recorded on the disk at a cycle of approximately 31 seconds, so in order to construct one screen in the TV graphic mode, a time of 768 x 3111 SeC-2, 3 seconds is required. In the TV graphic mode, 16 colors can be selected from a prespecified color palette, making it possible to express subtle colors such as intermediate colors, and to provide vivid screen display.

Furthermore, as mentioned above, in the back of the color graphics image data in the TV graphics mode and the LINE graphics mode, in addition to the data constituting the 1-font image area, there is also data for image manipulation commands. be. The type of image manipulation command is specified by the instruction data of symbol 1, and includes, for example, a command to scroll the entire screen, a command to fill the entire screen with one color, etc. By combining these commands, you can create an effective screen. It is designed so that it can be displayed.

Of the display screen modes mentioned above, ZERO mode is a mode that does not affect the currently displayed screen.
Subcode data R, S, T, U, V, 'v of a disc that is in so-called NOP (no operation) mode and does not record color graphics image data.
All Vs are in this ZERO mode.

Here, according to the standard for displaying color graphics images using subcode data R to W of audio compact discs as described above, TV
In graphic mode, data for each font that is played sequentially is stored in video RAM (random access).
A white font command and a video R
There is an exclusive-OR font command that performs an exclusive OR operation between the font data written in the AM and the font data reproduced from the disk, and writes the result back into the video RAM.

Each of these drawing commands is assigned 16 types of channel numbers CHO to CH15 each consisting of 4 bits, and each channel number CHO to CH15 is, for example, CHO...English lyrics C)-11. ...Pictures (flowers, etc.) CH2...Japanese translation CH3...Japanese lyrics CH4...French interpretation CH5...Sheet music CH6...Dance steps CH7...Sung with English lyrics Pointer CH8 indicating the part that is displayed. German translation CH9 to CH15. Color graphics image data is recorded on the disk so as to correspond to each unused image.

FIG. 10 shows the actual format of one batch of color graphics image data including the above drawing command. Note that in FIG. 10, symbols 2 and 3 and symbols 20 to 23 are ', parity data Q, and P, so they are omitted for simplicity.

That is, the display screen mode of symbol O [001001
J indicates the TV graphics mode, and instruction data ro00110J of symbol 1 indicates a white font command. Also, symbol 4.
The 4 bits consisting of subcode data R and S of No. 5 are a portion in which code data specifying the channel number CHO-CH15 is recorded.

Roughly speaking, data rcOLOROJ of subcode data TW of symbol 4 indicates the background color of the display screen, and subcode data TW(7) of symbol 5 rcOLORIJ indicates the foreground color of the display screen. It shows. Further, data rROWJ of subcode data S to W of symbol 6 indicates a vertical address (1 to 16), and data rcOLU of symbol 7 indicates a vertical address (1 to 16).
MNJ indicates a horizontal address (1 to 48). Note that symbols 8 to 19 are portions in which data corresponding to one font is recorded, as described above.

Therefore, it is necessary to enable the user to appropriately select and set the image display of the desired channel number CHO-CH15 when playing back the disc. In other words, for example, when playing a disc to which channel numbers @CHO to CH3 are attached to extraction commands, specify in advance to the playback device that only the extraction command with channel number CHO is valid. If possible, the image displayed on the screen will be a collection of only the extraction commands to which the channel number CHO was added during recording, and the extraction commands with channel numbers CH1 to Cl-13 recorded on the same disk will be ignored. You can do as you like.

Here, color graphics 1iif! is created using subcode data R-W as described above. According to the compact disc standard that displays 11 channels, for example, the channel CHO
Images corresponding to channels CHO and CHO may be displayed simultaneously on the same screen.

All channel numbers CHO-, such as displaying images corresponding to CH2 and Cl-13 on the same screen simultaneously.
It is said that it is necessary to be able to indicate whether or not the drawing command is valid or invalid for all combinations of CH15.

Note that, especially in playback devices that do not have a channel number selection function, the channel number CHO is forced.

The standard is to select CHl.

Therefore, in recent years, ``?'' has been added to white font commands, exclusive-or-font commands, etc. Disc playback devices have been developed that have a function that enables or disables the extraction command independently for each channel number, and allows the user to freely select and set the extraction command for each channel number.

However, such conventional disc playback devices are still in the development stage and cannot fully meet the needs of users, and there is a strong desire to develop a disc playback device that is even more convenient to handle. It is something that

(Problems to be Solved by the Invention) As described above, conventional disc playback devices are still not fully satisfactory to users, and there is a need for even more convenient handling.

Therefore, the present invention has been made based on the above-mentioned circumstances, and provides an extremely good disc playback device that displays all the channel numbers of the extraction commands recorded on the disc in an easy-to-recognize manner to facilitate handling. The purpose is to provide

[Structure of the Invention] (Means for Solving Problems) That is, the disc playback device according to the present invention identifies the channel number added to the extraction command in the image signal obtained by playing back the disc, All identified channel numbers are displayed.

(Function) According to the above configuration, the channel number added to the extraction command in the image signal obtained by playing the disc is identified, and all the identified channel numbers are displayed. This makes it easier to handle.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of a disc playback device that displays color graphics images using subcode data R to W recorded on a compact disc. This disc reproducing device includes an audio reproducing section A for reproducing audio data components of data recorded on the disc 11, and subcode data R to R recorded on the disc 11.
It is comprised of a subcode decoder section B for signal processing W and displaying a color graphics image.

First, the audio playback section A includes a disk motor 12, an optical pickup 13, a servo circuit 14, a microprocessor 15, a demodulation circuit 16, and a subcode Q detection circuit 1.
1, D/A (digital/analog) conversion circuit 18, audio amplifier 19, speaker 20, subcode R to W
It consists of a detection circuit 21 and a key switch group 22.

When the playback key of the key switch group 22 is operated, the microprocessor 15 controls the disk motor 12, the optical pickup 13, and the servo circuit 14, and the data recorded on the disk 11 is transferred to the optical pickup 13. will be read by.

The data read by this optical pickup 13 is
The demodulation circuit 16 performs waveform type and EFM (Eight to Fourteen Modulation) demodulation, and separates the signal into audio digital data and a synchronization signal including subcode data.

Of these, the synchronization signal is supplied to a subcode Q detection circuit 17 and a subcode R-W detection circuit 21, respectively, and subcode data Q and subcode data RW are detected. The subcode data Q is then supplied to the microprocessor 15 for controlling, for example, a search operation, and the subcode data R to W are supplied to the subcode decoder section B for image display, which will be described later. It is provided.

Further, the audio digital data is converted into an audio analog signal by the D/A conversion circuit 18,
The signal is supplied to a speaker 20 via an audio amplifier 19.

On the other hand, the subcode decoder section B includes an error correction circuit 23, a microprocessor 24, a main memory 25, a key switch input port 26, and channel numbers CHO to CH1.
5, a memory control circuit 28, an image memory 29, a color lookup table 30, a D/A conversion circuit 31, a color CRT display 32, and a system path line 33.

The subcode data R-W detected by the subcode R-W detection circuit 21 is subjected to dinterleave processing, error correction processing, etc. by the error correction circuit 23, and then is sent to the system path line 33. A microprocessor 24 is supplied to the microprocessor 24 via the microprocessor 24. When this microprocessor-24 is supplied with the error-corrected subcode data R-W, it transfers the image data component and command data component of the data to the system path line 33.
The signal is supplied to the memory control circuit 28 via.

Here, the memory control circuit 28 includes a memory address generation circuit 28a, a memory read/write timing generation circuit 28b, a video timing generation circuit 28c, a parallel-serial conversion circuit 28d, etc. Accordingly, the image data is written to a predetermined address in the image memory 29, and the image data stored in the image memory 29 is read out and outputted to the color lookup table 30 as serial data (color code) every 4 bits.

This color look-up table 30 is made up of a high-speed memory, and the color code can be rewritten under the control of the microprocessor 24. The memory control circuit 28
The 4-bit color code output from R. G and B are converted into 4 bits each, making a total of 12 bits of data.

As is well known, the above R, G, and B mean the three primary colors of light, red, green, and blue, and the values expressed by each 4 bits represent the luminous intensity of the three primary colors at the pixel. It is what it represents.

Then, R from the above color lookup table 30
,G. B Each 4-bit output data is sent to the D/A conversion circuit 3.
1 is converted into a voltage level, and the electron gun of the color CRT display 32 is controlled. Further, the memory control circuit 28 generates horizontal and vertical synchronization signals necessary for the color CRT display 32 to display an image, so that a color graphics image can be displayed.

Here, by operating a predetermined key of the key switch group 27, a desired channel number CHO-CH15 is selected and set from among the channel numbers CHO-CH15 added to the Sodeyama command in the color graphics image data. Only the sleeve commands of the selected channel numbers CHO to CH15 are executed.

That is, when a desired channel number CHO to CH 15 is selected and set by operating a predetermined key of the key switch group 27, the operating state of the key is transmitted to the microprocessor via the key switch input board 26 and the system path line 33. -24. Then, the microprocessor 24 determines whether the channel numbers CHO to CI-115 added to the oil-side commands in the color graphics image data obtained when playing the disc 11 are the selected channel numbers CHO to CH15. It operates so that only the oil-side commands of the selected channel numbers CHO to CH15 are executed, that is, are made valid.

Here, the main memory 25 includes a ROM (read only memory) 25a storing a program for causing the microprocessor 24 to perform a series of control operations as described above, and a RAM (random access memory) 25a.
memory) 25b. And the above RAM
In the 2Sb, a flag register of 8 bits x 2 bytes - 16 bits as shown in FIG. 2 is formed.

Each bit FO to Ff of this flag register corresponds to channel number CHO-CH15, respectively. Then, each time the microprocessor-24 recognizes the channel number CHO~C)115 added to the oil side command in the color graphics image data obtained when playing the disc 11, the microprocessor-24 recognizes the channel number C)-10- C) -115
Bits FO~l”f of the flag register corresponding to “1”
”.

Here, the contents of the flag register are stored in the color CRT display 32 by the microprocessor 24.
On the screen, as shown in FIG. 3, it is displayed at the bottom of a border area 32b formed around the screen area 32a. That is, in FIG. 3, bits FO, F1 . F3 is “1”, that is, channel numbers CHO, CH1, C
This indicates that the oil side command H3 has been reproduced from the disk 11.

Here, the display format of the channel number CHO-CH15 on the color CRT display 32 is as follows:
Channel number CHO~G of oil side command reproduced from 1
)-115 is changed as shown in FIG. 4 depending on whether or not it is selected and set by the key switch group 27.

That is, in FIG. 4(a), the channel number that is not selected and set by the key switch 8f27 is
This shows the display format when playing back from 1, in which the number part a representing the channel number is lit in a predetermined color (the shaded part in the figure), and the background part of the number is turned off. . In addition, FIG. 4(b) shows that the channel number that has not been reproduced from the disk 11 is
This shows the display format when the channel number is selected and set. The number part a representing the channel number is turned off, and the background part of the number is displayed in a different color from the number part a (the shaded part in the figure). It looks like this.

Roughly speaking, FIG. 4(C) shows the display format when the channel number selected and set by the key switch group 27 is being played back from the disc 11. The background part is also illuminated.

Here, FIG. 5 shows that the microprocessor 24 receives subcode data R-W from the error correction circuit 23, and
This shows the operation of executing the oil side command.

That is, playback of the disc 11 starts (step Sl)
If so, the microprocessor-24 performs step S2.
Then, the memory control circuit 28. Initialization processing is performed on the color lookup table 30 and other circuits forming the subcode decoder section B.

Next, in step S3, the microprocessor-24
It is determined whether an oil side command has been output from the error correction circuit 23. If the oil side command is not outputted (No), the microprocessor 24 continues the determination operation, and if the oil side command is outputted (YES), the microprocessor 24 proceeds to step S4 to process the input oil side command. Determine whether or not is a white font command.

If the command is a white font command (YES), the microprocessor 24 reads the channel number from one batch of color graphics image data including the command in step S5. Also, if it is not a white font command (No), the microprocessor-24
In step S6, it is determined whether the input Sodeyama command is an exclusive-or-font command.

If it is an exclusive or font command (YES), the microprocessor 24 executes step S.
In step 5, the channel number is read from one batch of color graphics image data that includes the instruction. Also,
If it is not an exclusive or font command (No
> In step S7, the microprocessor-24 determines that the input data is an image manipulation command such as a scroll screen command or a color lookup table change command, and performs the necessary processing for those commands. , step $8, previously color CRT display 3
The channel number displayed in step 2 continues to be displayed, and the process returns to step S3.

On the other hand, based on the channel number read in step S5, the microprocessor 24, in step S9, sets the bit FO of the flag register corresponding to the channel number.
- Set Ff to “1°”.

Then, the microprocessor 24 performs step SIO
If the previously fetched channel number is the channel number selected and set by the key switch group 27, the Sodeyama command is executed, the channel number is displayed on the color CRT display 32 in step S8, and step Return to S3.

Therefore, according to the configuration of the above embodiment, the channel number CHO-CH1 added to the Sodeyama command in the color graphics image data reproduced from the disk 11
5 is displayed on the screen of the color CRT display 32, the user can easily recognize which channel number is recorded on the disk 11, and the handling becomes easier. It is something.

Further, as shown in FIG. 4, the display format is changed depending on whether the channel number obtained by reproducing the disc 11 is the channel number selected and set by the key switch group 27. In this respect as well, handling can be facilitated.

Here, in the above embodiment, the channel number is
Although the channel number is displayed on the display 32, for example, the subcode decoder section B of the disc playback device may be provided with a channel number display section.In other words, the location where the channel number display section is provided is not specified at all. Of course, it is not a thing.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist thereof.

[Effects of the Invention] Therefore, as detailed above, according to the present invention, all channel numbers of Sodeyama commands recorded on a disk are displayed in an easy-to-recognize manner to facilitate handling. A disc playback device can be provided.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of a disc playback device according to the present invention, and FIG.
The figure is an explanatory diagram of the flag register of the same embodiment, Figures 3 and 4 are the front entrance showing the display state of the channel number of the same embodiment, and Figure 5 is a flow chart for explaining the operation of the same embodiment. , Figure 6 is a diagram for explaining the format of one batch of color graphics image data, and Figure 7 is a diagram for explaining the format of one batch of color graphics image data.
The figure is a diagram for explaining the image area of 1 font.
Figures 9 and 9 are for TV graphics mode and L, respectively.
FIG. 10 is a diagram for explaining one screen in the INE graphics mode, and is a diagram for explaining the Sodeyama command part in one batch of color graphics image data. 11... Disc, 12... Disc motor, 13
...Optical pickup, 14...Servo circuit, 1
5...Microprocessor-116...Demodulation circuit,
17... Subcode Q detection circuit, 18... D/A conversion circuit, 19... Audio amplifier, 20... Speaker, 21... Subcode R-W detection circuit, 22...
・Key switch group, 23...Error correction circuit, 24・
...Microprocessor-125...Main memory, 26
...Key switch input board, 27...Key switch group, 28...Memory control circuit, 29...Image memory, 30...Color lookup table, 31...
- D/A conversion circuit, 32... Color CRT display, 33... System pass line. Applicant's Representative Patent Attorney Takehiko Suzue Figure 2 Figure 3 (a) (b) (c) Figure 4 Figure 5 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] This device plays back a disc on which an audio signal, an image signal, and its image manipulation instructions are digitized and recorded, and a desired image is generated by selecting and setting the channel number added to the extraction instruction in the image signal. In a disc playback device for displaying on a screen, an identification means for identifying a channel number added to an extraction command in the image signal obtained by playing the disc, and all the channel numbers identified by the identification means. 1. A disc playback device comprising display means for displaying a display.