JPS6180684A - Reproducing device of digital disk record - Google Patents

Abstract

PURPOSE:To display continuously a picture before the start of a pose action at the time of executing the pose action by providing a picture holding means which stops data processing by a pose action control means with respect to new picture data of a pose action period data processing means and displays continuously the display picture before the start of the pose action. CONSTITUTION:When a pose key 131 is operated, the sound and drive of a speaker 118 are stopped, and simultaneously address data reproduced from a disk 111 through a subcode Q detection circuit 115 and picture data reproduced through a subcode R-W detection circuit 116 are read out. Then a search action is continuously executed with the recognized address data as a target address. Namely, actions denoted by items (a)-(c) are executed and set to a pose action: (a) A search target address (point A in the figure) is set. (b) Waiting in the reproduction state until the search target address is reproduced (dotted line part in the figure). (c) After the search target address is reproduced, a pickup 110 is moved to the inner peripheral direction (point B in the figure) of the disk 111 (kick in the backward direction), and the operation is again returned to the step of (b) (arrow part in the figure).

Description

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

[Technical background of the invention]

At present, some audio equipment employs a digital recording and reproducing method that incorporates PCM technology in order to achieve high fidelity reproduction and improved operability. Therefore, to explain the CD system as an example, it is a transparent resin disk with a diameter of 12 cIR and bits (bits) corresponding to digital PCM data.
A disk coated with a metal thin film forming irregularities with different reflectances is rotated by a CLv (constant linear velocity) method tζ, and an optical pickup with a built-in semiconductor laser and optical conversion element converts the disk to the inner circumference. The playback is performed in a linear tracking manner from the side to the outer circumference.

Therefore, the disc includes subcode data for improving operability and realizing advanced functions, along with audio data to be reproduced. Then, this subcode data is divided into (per frame) each subcode P1 and subcode Q.
Each code is composed of 8-bit data called subcode W to subcode W. Of these, subcode Q is called address data, and in the program area of the disc (range from half vk2s to 58ag), each recorded song number (TNO), section number (INDEX), elapsed time (TIME) ), etc., and the area located on the inner shoulder side (radius 23 ~
25m range), the start address of each track number is indicated as 'l'Oc (table op content) data. In other words, this subcode Q is used to select the desired address from the vast amount of recorded information recorded on the disc. The subcode P is recorded so that the search operation for selectively reproducing the data to be reproduced can be performed quickly and accurately), and at the same time, it is also used as display data. This data is a simplified version of the subcode Q that simply shows only the 9th variation of each subcode, and is used in parts store playback devices that do not have an advanced search function.

On the other hand, the subcode R-W, which consists of 6 bits and 7 bits per frame, is not used on existing discs that only record audio data for playback, but has recently been used as data for displaying images. It is being considered to do so. In other words, this subcode data is intended to display, for example, an ``rV image above image'' in synchronization with the audio data, and its specific structure and usage are currently being considered as follows. .

In other words, the above image data is roughly divided into units of display image data called packs or image manipulation commands such as scrolling the screen, and each piece of data is divided into one unit as shown in FIG.
Consists of 44 (-24X6) pits. here,
Symbol O is mode/item data and specifies a display screen mode as described later. Moreover, the symbol l is the above-mentioned Ii! iiigR display data, instruction lesson data indicating the type of image manipulation command, and symbols 4 to 3
19 is data for each instruction. Symbols 2.3 and 20 to 23 are parity data generated by the Reed-Solomon code, and the reproducing apparatus uses this to perform error determination and error correction.

Here, the display screen modes specified by symbol O include TV (television graphic) mode, LINE (
There are three types: line graphic) mode and ZERO (zecl) mode. Therefore, TV mode and Figure 6 (a)
) As shown in Figure 6(b), this mode assumes a display device such as a CRT display where the Vc1 screen consists of 288 x 192 dots of pixels, and LINE 7-Card is a mode where one screen consists of 288 x 24 dots as shown in Figure 6(b). This mode assumes a simple display device, such as a liquid crystal display, which is composed of pixels. These screens are subdivided into areas each consisting of 6 x 12 dots called 7 dots as shown in Figure 6 (q).
, 1N12 mode, one screen is 48x27 onts.

In addition, the above-mentioned display 1IIUj! The data corresponds to this one font! Data for each pixel within 7 onts is stored in the data area (6×12 bits) of symbols 8 to 19 shown in FIG. Therefore, when displaying in TV mode, for example, it is necessary to record 768 (=, 48×16) back data on a disk to configure one screen. Also, 1
Back data is recorded at a cycle of approximately 3rllScC, and it takes 2.3 seconds (7
68 x 3 msec) is required. Z-KSTV
When in mode, the 16 pre-selected colors can be used to create interesting expressions such as intermediate colors and complex color changes, allowing for vivid images to be displayed. Similarly, ¥'i: In the LINn mode, it is possible to display images in 8 colors. Also, among the above display screen modes, z g
The ao mode means that no shadow is cast on the display screen (No Qperation).
The subcodes of discs that do not record images are all ZE, just like existing discs.
Ordinary mode data will be recorded.

On the other hand, the pack data in the TV mode or LINE mode includes an image manipulation command separate from the display image data as described above, and the type of the command is indicated by the infrastructural data of the symbol l. Here, the above image manipulation command includes a scroll command for the entire screen (command to move the entire screen horizontally or vertically), a scroll command for only a specific row or column, or a command to paint the entire screen in one color). There are preset screen commands for crushing, etc. By combining all of these commands, it becomes possible to construct an effective screen with visual changes.

[Background technology interset]

However, in a digital disc record playback device that targets discs on which such image data is recorded, it is necessary to display an accurate image from the subcode data and to freely scroll the screen by 7 degrees, which is not possible with conventional models. It is necessary to be equipped with advanced image display functions, and in particular, it is required to enhance the control system. For example, the playback device described above is equipped with a pause function that maintains a suitable playback position constant, and when this operation is performed, a search operation is repeatedly executed using the operation start position as the target address. .

Therefore, the data reproduced during that time is discontinuous, and specific data is repeatedly reproduced.

On the other hand, the image data of subcodes 几 to W display images in synchronization with the back door signal, and are continuously reproduced to form one screen. Therefore, it is meaningless to repeatedly display the image data that is reproduced during the pause operation, and if the data that is repeatedly reproduced is, for example, a scroll command, the displayed image will not be displayed despite the pause state. will change, resulting in an unnatural image being displayed. For this reason, it is desirable to display a complete image even when the above-described pause operation is performed.

[Purpose of the invention]

The present invention has been made in response to the above-mentioned technical requirements, and an object of the present invention is to provide a digital disc record playback device that can continuously display an image before the start of the pause motion when the pause motion is executed.

[Summary of the invention]

The digital disc record reproduction wave of the present invention [C] A reproduction means for reading each of the above-mentioned data above a disc on which image data is digitized and recorded together with one audio data as shown in Fig. 1; an image data detection means for detecting image data from the image data detected by the image data detection means; a data processing means for performing data processing to generate display data according to the image data detected by the image data detection means; a display data supply means for supplying display data to a predetermined display device; a pause operation control means for maintaining a data read position in the reproducing means by detecting a predetermined key human force; The present invention is characterized by comprising an image holding means for stopping the data processing of new image data by the data processing means during the pause operation period by the means and continuously displaying the display umw before the start of the pause operation.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a CD-type digital disc record playback device to which the present invention is applied will be described with reference to the drawings.

First, FIG. 2 shows a schematic electrical circuit system of the digital nice record playback device in this embodiment.
In the figure, the control circuit (101) consists of a macro computer, an interface circuit, etc., and by selectively operating the key of the gear switch # (lo2),
According to the program stored in the R,OM (103), the disc playback system (104) is controlled to a predetermined state, and the display 1 (105) and CRT display (
106) displays various types of information as will be described later.

Therefore, the disk recompression system (104) is controlled by the control circuit (101).
) drives the disk motor (108) and pickup feed motor (109) via the disk reproduction system control circuit wr (107), and when the laser diode of the pickup (110) is turned on, the data recorded on the disk (111) is driven. The data is reproduced by the pickup (110), and the reproduced signal is sent to the RF signal detection circuit (112)K. This RF signal detection circuit (112) supplies the detected F signal to a servo circuit (113) (separates it into an &r signal and an EFM signal to be supplied to a demodulation circuit (114).Here, the servo circuit (113) Pickup (110)
It sends out signals for applying focus servo and tracking servo to the disc reproducing thread control circuit (
In combination with the control signal from 107), a signal for performing linear tracking servo is sent out. Further, the demodulation circuit (413) performs waveform shaping and BFM demodulation of the gPM signal, separates a synchronization signal that becomes length code data, and transmits the synchronization signal to the subcode Q detection circuit (115) and the subcode It~ In addition to being supplied to the W detection circuit (116), the signal from which the synchronizing signal is separated is also supplied to the signal 'fLD/A change circuit* (1i7J).Then, it is converted back to an analog signal by the D/A conversion circuit (117). The reproduced signal is subjected to necessary processing such as encoder correction and error correction, and is then used to drive the speaker (118) to produce a sound. The code Q is loaded into the TOC data in the lead-in area and taken into the control circuit (119) via the control circuit (101), and is used to perform necessary control functions such as the search function. If it is address data of the program area, it is sent from the control circuit (101) to the display section (105) via the display output control circuit (120) to display necessary information such as TNO or TIME.

On the other hand, the image data of the subcode R-W detected at the step code R-W detection time wr (116) is transmitted to the control circuit (10
1) and is written to a predetermined address in the graphic video RAM (122) via the video RAM control circuit (121). In addition, this graphic video ram (122
) is used which has various display screen modes at the front and has a container of 192 to 256 and a bailer. Also, TV
The multiplication signal generation circuit 123) generates a signal for displaying the TV screen by adding signals such as a vertical synchronization signal and a horizontal synchronization signal, and outputs this signal to the CRT display (106).
supply By supplying a predetermined control signal to the video ram control circuit (121), the control circuit (101) controls the image data in the graphic video ram (122) to the image on the CRT display (106). can be freely controlled.

The key switch group (102) for specifying the operation of the digital disc record reproducing apparatus is provided with a well-known pause key (131) and start key (132). Here, the pause key (131) is for instructing a pause operation to hold the playback position, that is, an operation to continuously check the address at the time this key is operated, and the start key (l32) is for This is for canceling the above operation.4 Next, the control function, which is a feature of this embodiment, will be explained based on the above configuration.

As mentioned above, pose-? - (131) is operated and a pause operation is started, if a normal image kIJ display operation is executed, specific image data will be repeatedly reproduced and the same command will be repeatedly executed.

If the command is a preset screen command that fills the entire screen with one color or a command that adds fonts to the screen, there may be no effect on the screen even if it is executed repeatedly, but if it is a scroll command, for example, , the surface image changes one after another, resulting in an unnatural image being displayed that differs from the intended surface image when the disc is manufactured.

Therefore, in this embodiment, in order to avoid such a situation,
When an operation of the pause key (131) is detected, image data processing is stopped and the image before the start of the pause operation is continuously displayed.
1) is performed by a microconbeater.

Here, to drive the microconbeater, R
FIG. 3 shows a flowchart of the pause motion execution program that is included in OM (io3), and will be explained below along with this flowchart.

First, the microcomputer in the control circuit (101) detects the disk (
111)) and recognizes what kind of data it is.

(Step ■) Then, when new data is reproduced, processing according to the data is performed. For example, when a command to write a font on the screen is reproduced, the image data is transferred to the graphic video ram (121) using the video ram control circuit (121).
122) Kf @ Performs processing. Therefore, in this step, the reproduced image data is processed, and CR
An image is displayed on the T display (106). (Step ■) Next, it is recognized whether the pause key (131) has been operated. Note that the microcomputer monitors the operation of each of the key switches 9 (102), and a predetermined program is executed according to the operated key switch. (Step ■) Then, pause key (1
31) is operated, first, the control circuit (101) controls the loud meet signal supplied to the D/λ conversion circuit (t17) to stop the sound drive of the speaker (118).

(Step Q) At the same time, subcode Q + jR output circuit (
115) = Recycled stone from the disk (ol) through
Address data and subcode R-W detection circuit (116
) to read the image data played back. At this time, as shown in Figure 4, the address data is 13m5e.
One piece of data is composed of c intervals, and the image data is composed of seven circles, approximately 3m5eC1h'J intervals. Therefore, if address data DA is recognized at the time of person in the figure, A' which is synchronized with it during that time One to four pieces of image data are recognized up to the point in time. (Step ■) Then, the same process as step ■ is performed according to the image data recognized above. The process here is at the processing operation stop position fim (A') of the md data.
The purpose is to determine the If you are not using a precise positioning tool, you can omit this step.

(Step ■) Next, a search operation is continuously executed using the recognized address data as the target address.

That is, the following actions A) to I.) are executed to form a pause action. b) Search target address (point A of the 4th cause) t
- Set. (g) In the playback state, wait until the length-chi target address is reproduced (dotted line in Figure 4). When the length-chi target address is reproduced, move towards the inner circumference of the disk (111) (see Figure 4). Move the pickup (110) to point B (backward pick) and return to step B (point B) (in Figure 4).

(arrow part). (Step ■) Key switch during the above pose movement! During the start in (102), it is recognized whether or not (132) has been operated.

When this key is operated, after the pause operation is completed and the above search target address is reproduced, that is, after the reproduction operation position is at A(A')K, the D/A conversion circuit (117)
The audio signal meet signal supplied by K is controlled, the sounding drive of the speaker (11g) is restarted, and the process returns to step (2). (Step ■) In this way, by following the above-mentioned steps in the 1-Piece Example, image data processing is not executed during the pose action, so the image t1 before the pose action!
It is possible to maintain the image quality and avoid unnatural image display. In addition, for this reason, the above-mentioned pause function can be used not only for audio data, but also for image pause operations (for example, 411C for copying displayed words).
However, the present invention is not limited to the above-mentioned and illustrated means for realizing the present invention; various modifications and applications are possible, and the present invention allows the application of a wide range of means. It is. For example, it is impossible to recognize and process image data r even during a pause operation, and to avoid executing processing that would cause a sudden call to occur.

〔Effect of the invention〕

As described above, the digital disc record reproducing apparatus of the present invention is capable of continuously displaying an image before the start of the pause operation when the pause operation is executed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the overall configuration of the present invention, FIG. 2 is a block diagram showing an electric circuit system in an embodiment of the digital disc record playback device according to the present invention, and FIG. A flowchart showing the procedure of the characteristic operation, FIG. 4 is an explanatory diagram for explaining one operation of the same embodiment,
FIGS. 5 and 6 are explanatory diagrams for explaining the conceptual structure and display screen mode of subcodes R to W in the technical background of the present invention. 101... Control circuit, 104... Disc 6 generation system,
115...Subcode Q detection circuit, 116...Subcode 几~W detection circuit, 121...
Video ram control circuit, 122... Graphic video ram, 123... TV
Damage signal generation circuit 131 Pause key 132...
・Starting - 1 Agent Patent Attorney Rule Kon Iru 1st on the right! lft Figure 3, Figure 1, Figure 5

Claims (1)

[Claims] Reproducing means for reading each of the above-mentioned data from a disk-shaped recording medium in which image data is digitized and recorded together with audio data, and detecting the above-mentioned image data from the data read by the reproducing means. an image data detection means; a data processing means for performing data processing to generate display data according to the image data detected by the image data detection means; display data supply means for supplying data to the apparatus; pause operation control means for holding the data read position in the reproduction means by detecting a predetermined key input; and processing of the data during the pause operation period by the pause operation control means. 1. A digital disc record playback device comprising: image holding means for stopping data processing of new image data of the means and for continuously displaying a display image before the start of a pause operation.