JPH0562349A - Method and device for recording and reproducing information - Google Patents

Abstract

PURPOSE:To record and reproduce massive pictures, audio and musical data, in reference to a device for producing pictures with music for which an optical disk for a large scale distribution such as a DAD device is used. CONSTITUTION:From the frame data of pictures that are displayed with changeover of several tens for a second, the frame data are extracted with a data separation 726 intermittently at an interval, restored with a picture spreader 738, combined with audio data that are also data-compressed reproduced. Thus, in the optical disk such as a DAD, the pictures, audio and musical in the optical disk such as a DAD, the pictures, audio and musical data are recorded and reproduced time-sequentially for a long period with a high quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention records and reproduces image and audio information on one information record carrier. INDUSTRIAL APPLICABILITY The present invention is particularly suitable for an image reproducing apparatus with audio and music for entertainment and education, which uses a mass-distributed small-sized read-only memory (ROM) optical disk represented by DAD (digital audio disk). is there. The contents of the present invention are
A method of recording and reproducing a large amount of image, sound and music data,
The present invention relates to the reproducing device and the master cutting device.

[0002]

2. Description of the Related Art Conventionally, a mass-distribution type read-only memory (ROM) optical disk such as a DAD has been widely used. However, when attempting to record and reproduce time-series image data such as a moving image on the DAD, an optical disk is used. The recording capacity of a general DAD with a diameter of 12 cm is about 600 MB, and the diameter is 8
Since the DAD of cm is as small as about 120 megabytes and the data transfer rate is slow, the reproduction time is usually several minutes regardless of the analog or digital form, and it is difficult to reproduce for a long time. Various advanced compression methods have been developed to solve this problem, but there is a problem in that the quality of reproduced images is poor and the reproducing apparatus becomes considerably complicated.

A known example of recording an image and a sound on one medium is, for example, JP-A-60-236163. In this device, discrimination information is added to each of image information and audio information, and these pieces of information are mixed on the medium. However, this type of device has a problem that data management, reproduction time axis management, continuous reproduction, and the like are complicated because separate discrimination information is added to each of image and sound and they are separately managed. It was. In addition, there is no particular reference to reproducing images and sounds in association with each other at the same time.

Further, as another conventional technique, there is a technique in which video image or audio information is mixed with computer graphics information and recorded in one recording medium.
-61867. In addition, JP-A-62-1
No. 180684 discloses a technique for centrally processing audio and image data. However, in none of the above, the data structure and the recording / reproducing method for associating and reproducing the image and the sound at the same time have been described.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to record high-quality, long-term time-series image and audio data on a small optical disk such as a conventional DAD, and to store the image and audio data. The present invention provides an information recording / reproducing method, an reproducing apparatus for the information recording / reproducing method, and a master cutting apparatus for the information recording / reproducing method, which can be easily reproduced by organically associating the same.

[0006]

To achieve the above object, in order to achieve the above-mentioned object, frame data of images which are continuously displayed in tens of seconds in a time-series manner are displayed intermittently at time intervals from frame data of images. Is extracted and data compression is applied. Further, the music or audio data that is continuous in time series is compressed, and is combined with the compressed image data and recorded on a recording medium such as an optical disk.

In order to achieve the above-mentioned object, the reproducing apparatus reads the compressed image data and voice or music data from the optical disk and decompresses the data.
The decompressed voice or music data is continuously reproduced in time series, and the image data is intermittently switched and displayed at fixed time intervals or at different time intervals.

Also, the compressed image data and audio data are handled as a set. This set is further divided as necessary, and each has a header and synchronization information, which makes it easy to handle images and sounds in association with each other. For example, the still image and the music played while the still image is displayed can be accessed at the same time, which facilitates the handling of the image and the audio information during playback.

Further, a set identification signal is given to the set of the compressed image and voice or music data, and the set is recorded on the optical disk together with the set identification signal. During reproduction, the recorded data set and the set identification signal are read out, and the data set is selected by the set identification signal.

[0010]

The amount of image data is reduced because the frame data is intermittently extracted at a time interval from the frame data of images which are displayed in tens of frames continuously displayed in a time series. For example, if the frames are extracted once every 3 seconds, as compared with the NTSC system that switches 30 frames per second, the data amount becomes 1/90.

When this is reproduced, the display image changes from a moving image to a still image which can be intermittently switched, but there is almost no problem in transmitting the information content. If the extracted image data is compressed, the data amount can be further reduced. By recording the compressed image data in combination with the compressed voice or music data, it becomes possible to record the image and voice data for a long time on an optical disc such as a DAD.

The image data and the audio or music data, which are data-compressed and recorded on the optical disk, are read out by the reproducing device, decompressed, and reproduced and displayed on the respective liquid crystal displays, headphones, etc., and the information contents are transmitted. Be seen.

The contents of the data can be known by the set identification signal added to the set of data, and the required data can be searched quickly.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a method of extracting image data according to the present invention. Normally, to display a video,
As shown in FIG. 1 (a), p (1) to p (N
Up to p), Np frames are switched and displayed.
As shown in FIG. 1B, these continuously form an image data string P, and a moving image is displayed.

Taking the NTSC system as an example, Np is 30, and 30 frames are switched per second and displayed as a moving image. The NTSC signal is multiplied by 4 times fsc (1
When sampling at 4.31818 MHz) with 8-bit resolution, the amount of data per frame is about 3.8 Mbits. Further, in this case, the data amount of the image data string P is 412 Gbits (51.5 Gbytes) per hour, which cannot be recorded on a small optical disc such as a DAD.

In the present invention, frames are extracted from the image data string in FIG. 1B at a certain time interval Ts as shown in FIG. 1C. Furthermore, when displaying, Ts
The extracted frame is repeatedly displayed during the period. For example, if the frame data of p (n) and p (n + 1) are extracted at a time interval of Ts, as shown in FIG. 1 (d), the screen is displayed at intervals of Ts and p (n), p ( n + 1)
Is switched and displayed. FIG. 1E is an enlarged view of frame data extraction and display. For example, after p (n) is extracted, p (n + 1) is extracted until the next p (n + 1) is extracted.
(N) is repeatedly displayed.

In the case of the above-mentioned NTSC system, for example, Ts
If the time is 3 seconds, the amount of data per hour is about 4.6G.
It becomes a bit (573 Mbytes). This is, for example, 1
It is shown that when only image data is recorded in the 2 cm DAD, it is possible to reproduce for about 1 hour. Furthermore, if the image data is compressed as will be described later, for example, if it is compressed 10 times, then reproduction for 10 hours becomes possible.

FIG. 2 shows the structure of a data block which is a unit for handling image and audio data in the present invention. FIG. 2A shows a state of frame data and audio data according to the flow of time when outputting an image and an audio. The frame data includes p (n-1), p (n), p (n + 1) and Ts.
The right channel audio data sequence AR and the left channel audio data sequence AL are output in parallel with the display. The audio data string is obtained by A / D converting an analog signal. Assuming that the audio sampling frequency is Na, the right channel audio data ar and the left channel audio data al continue at a time interval of 1 / Na, as enlargedly displayed in FIG.

According to the present invention, as shown in FIG. 2B, one frame data p (n) and audio data strings AR (n) of both the left and right channels during the period Ts displaying the frame data. ) And AL (n) are treated as a set of data. Audio data sequence AR (n), A
L (n) is the left and right audio data ar,
It consists of al as described above. Also, p
Although (n) may be both analog and digital, it is treated as digital as in the case of audio data. This is because even analog signals can be converted into digital data if they are A / D converted. Therefore, FIG. 2B shows image and audio data during the period in which the frame data p (n) is displayed. These data are data-compressed and stored on an optical disc such as a DAD.

The frame data is compressed using, for example, the discrete cosine transform (DCT), and the audio data is compressed using, for example, the adaptive difference PCM (ADPCM), but it is not the object of the present invention. Does not say. The reproduction time of the image when compressed is as described above. Regarding audio data, when the data amount per sampling of each channel is 8 bits and the sampling frequency is 44.1 KHz, which is the same as the normal audio DAD, the data amount per hour is 2540 Mbits (318 Mbytes). For example, if this is compressed to 6 bits, the amount of data per hour will be 1900 Mbits (240 Mbytes), and if only audio information is recorded, 12 cm DAD can be reproduced for about 2.5 hours. Although the high frequency characteristics of the audio become worse, lowering the sampling frequency enables longer playback.

The frame data p (n) is image-compressed as pc (n), and the right and left channel audio data sequences AR (n) and AL (n) are compressed as A.
Rc (n) and ALc (n). As shown in FIG. 2 (c), these compressed frames and audio data pc (n), ARc (n) and ALc (n) are grouped together to form a data block DB (n).
Subsequent data blocks, such as DB (n) and DB (n
By decompressing +1) and continuously reproducing, image and audio data in the original time series are reproduced.

FIG. 3 illustrates how the data of this embodiment is stored on the DAD. Figure 3
(A) shows data in a unit sector, which is a delimiter for convenience of the DAD format. User data of 2328 bytes is added after the synchronization, header and sub-header, and a total of 2352 bytes constitutes one sector. The compressed image or audio data described with reference to FIGS. 1 and 2 will be stored in the user data by the method described later. The sector is divided into 24 bytes, scrambled (extracted and rearranged), and divided into 12-byte data as shown in FIG. 3B. FIG. 3B is called a frame and is composed of a start byte S, a control byte C, data 1 and data 2 divided into 12 bytes, and an error correction code (ECC) added after them. The frame here is different from the above-mentioned image frame.
As shown in FIG. 3 (c), one sector is composed of 98 frames. Actual optical disc (DA
In FIG. 4D, a continuous sector row as shown in FIG. 3D is pit-modulated (EFM: Eight Forteen Modulation), and is recorded as a pit row as shown in FIG.

FIG. 5 shows the structure of a data block (DB) which is a unit of data in the present invention. Figure 5
As shown in FIG. 5B, the data block shown in FIG. 5A is composed of one frame of compressed image data pc, and left and right channel compressed audio data sequences ARc and ALc corresponding to the reproduction time of pc. These data are shown in Figure 5.
As shown in (c), pc, ARc, and ALc are arranged, and further divided into 2328 bytes and arranged in the user data in the sector format shown in FIG. Figure 5 (d)
Indicates a sector column into which a data block is inserted, and as shown in FIG. 5E, the divided data block follows the synchronization and header information. Further, the sector column to which a certain data block is distributed, which is shown in FIG. 5D, is recorded on the optical disc from left to right, and is normally read out in this order when read out. That is, the sector containing the compressed image frame data pc is read first, and then the sector containing the compressed audio data ARc and ALc is read. The data is separated from the read sector, and the original data block or a part of the data block is reproduced.

In FIG. 5 (f), after the compressed image data pc,
The compressed audio data strings ARc and ALc are shown in FIG.
This is an example in which one sampling data is arranged alternately as shown in (g). In this way, after reading the compressed image data, the image can be displayed immediately, and the compressed audio data can be sequentially played back while being read, and the playback display can be performed without waiting for all the sector columns corresponding to the data block to be read. It is possible to start.

A sector header indicating the characteristics of the sector is added to the sector. An example of the sector header is shown in FIG. In FIG. 6, the sector header includes the data block number (DBNO) to which the data of the sector belongs, the total number of sectors of the data block (TOTALSECT), and the sector number (S of the sectors belonging to the data block (S
ECTNO) and an attribute (ATTRIBUTE) indicating what kind of information the data in the sector is. The sector header can be put in the sub-header of the sector format shown in FIG. 3, for example.

FIG. 7 is a block diagram showing an embodiment of the reproducing apparatus. An optical disc 700 such as a DAD, an optical pickup 702, an analog waveform shaping circuit 704, a synchronization detection circuit 706, and a digital signal processing circuit 7 with an error correction function.
08, a servo control circuit 714 for controlling auto focus, tracking or access, and a PLL (phase locked loop) oscillation circuit 7 for generating a reproduced clock
16, subcode detection circuit 720, and rotation control circuit 712
And spindle rotation motor 710, left and right DA converters 732-R and 732-L, analog amplifiers 734-R and 734-L, and speakers (or headphones) 736.
-R, 736-L, etc., which are usually commercially available types
AD reproducing apparatus), a circuit 722 for detecting header information from the read data, a data separating circuit 726 for separating the compressed audio data and the compressed image data of the left and right channels from the data, and a circuit for separating the left and right channels. Audio data memories 728-R, 728-L for storing compressed audio data, audio decompressors 730-R, 730-L for decompressing compressed audio data, and an image decompressor 738 for decompressing compressed image data, One or more frame memories 740 that store the expanded image data for each frame, and an image controller 7 that controls the arrangement of the data in the frame memory 740 on the display panel.
42, an LCD controller 746 for controlling the display on the LCD panel, an LCD panel 748 for displaying an image, and a controller for controlling the operation of each part of the reproducing device are added to the commercially available DAD reproducing device. The whole is composed.

When the optical disc 700 on which the image / sound information is recorded rotates at a constant linear velocity and the focus and tracking are good, the pit string data of the optical disc 700 is output from the optical pickup 702, and the analog waveform shaping circuit. A rising edge and a falling edge of the pit train data waveform are detected at 704, and then digital signal processing is performed by the synchronization detection circuit 706, the PLL circuit 716, and the signal processing circuit 708.
The subcode portion data whose corresponding portion is extracted by the processing circuit 708 is sent to the subcode detection circuit 720, and the random access is controlled through the controller.

On the other hand, the data whose error bits have been corrected by the digital signal processing circuit 708 is the header detection circuit 72.
Sent to 2. The header detection circuit 722 separates the sector header from the data, sends it to the controller 718, and
The compressed image data and compressed audio data other than the header are sent to the data separation circuit 726. The data separation circuit 726 distributes the data to the left and right audio data memories 728 or the image decompressor 738 according to a command from the controller 718. Audio data memory 728-R, 728
The left and right compressed audio data stored in L-L are read by a command from the controller 718, expanded by the audio expander 730, and the D / A converter 732.
Is converted into an analog signal by a speaker (or headphone) 736 through an analog amplifier 734.
Is output by. The compressed image data separated by the data separation circuit 738 is expanded by the image expander 738 and stored in the frame memory 740. Arrangement of the image data in the frame memory 740 on the LCD panel 748 is controlled by the image controller 742.
It is displayed on the LCD panel 748 through the controller 746. The synthesizer 724 creates the output timing of the audio data memory 728 and the control timing of the LCD controller 746 from the signal from the signal processing circuit 708. FIG. 8 shows a procedure of data reproduction using the apparatus of FIG. In FIG. 8A, the horizontal axis represents time, and sector data is read from the optical disc.
And the waiting is repeated. During the reading operation, the optical head sequentially reads the sector data according to the continuous tracks of the spirally formed optical disk, and during the standby, the optical head waits on one track to prepare for the next reading.

In one read, one data block is read as shown in FIG. For example, the read data block DB (i) is separated into frame data and left and right audio data, which are respectively image-expanded and audio-expanded and output. The situation is shown in FIG. For example, the compressed frame data pc (i) is expanded into the frame data p (i) and kept displayed until the output of the audio data strings AR (i) and AL (i) is completed. FIG. 3D shows in detail the state of image display in the case of the NTSC system. After the image data p (i) is displayed in 1/30 second of the display start, the audio data sequence AR (i ) And AL (i) output is completed, p (i) is continuously displayed. The compressed audio data strings ARc (i) and ALc (i) are expanded into audio data strings AR (i) and AL (i), and the audio data ar and al in these data strings are sequentially output. FIG. 8E shows audio data ar and a.
The output of 1 is shown in detail, which is sequentially output as stereo audio at a sampling interval of 1 / Na. Before the reproduction of the audio data strings AR (i) and AL (i) is completed, the next data block DB (i + 1) is read from the optical disc as shown in FIG. 8 (b). And the audio data sequence AR (i), AL (i)
When the playback of is completed, the next data block DB (i +
1) The audio data string AR (i
+1) and AL (i + 1) are continuously output. At that time, the screen display is switched to p (n + 1).

The flow of signals up to this point is shown in FIG. 7 by taking the reading of the data block DB (i) as an example. Then, the data from the signal processing circuit 708 is sent to the header detection circuit 722, and the sector header is separated. From the sector header information, the controller 718 determines the data block number of the data, the position of the data in the data block, and the type of image and audio data. Then, the data separation circuit 726 is instructed to distribute the compressed image data or the left and right compressed audio data data. The left and right compressed audio data ARc (i) and ALc (i) are stored in the audio data memory 728, and the compressed frame data pc (i) is expanded into p (i) by the image expansion circuit 738 and stored in the frame memory 740. It The controller 718 continues this operation until the data of a certain one data block DB (i) is read.

When the reading of the data of the data block DB (i) is completed, the controller 718 issues an output start command to the audio data memory 728 and the frame memory 740. In response to the output start command, the image controller 742 sends the frame data p (i) stored in the frame memory 740 to the LCD controller 746, and the LCD panel 748 displays the image. The image controller 742 continues to process the image data p (i) until the controller 718 sends a display frame switching command.
To the LCD controller 746. The compressed audio data strings ARc (i) and ALc (i) stored in the audio data memory 728 are sequentially audio-produced at a time interval of 1 / Na at a timing created by the synthesizer 916 in response to an output start command from the controller. It is sent to the decompression circuit 730. The decompressed audio data ar and al are converted into analog signals by the D / A converter 732, and output from the speaker (or headphones) 736 through the analog amplifier 734. The controller 718 controls the servo control circuit 714 before the output of the compressed audio data strings ARc (i) and ALc (i) from the audio data memory 728 is completed.
To read the next data block DB (i + 1). The compressed audio data string ARc (i), AL
When the output of c (i) is completed, the controller 718 instructs the audio data memory 728 to continuously output the compressed audio data sequence ARc (i + 1), ALc (i + 1), and also instructs the image controller to output the image data p. Instruct to output (i + 1).

As described above, the audio data sequence in a certain data block is sequentially reproduced along the time axis at every sampling interval, and 1 contained in the data block.
The image data for the screen continues to be displayed while the audio data string is being reproduced. Then, at the same time when the reproduction of the audio data string of the next data block is started, the image is also switched to the image data included in the next data block. In FIG. 8, the length of the audio data string included in one data block is constant, and the reproduction time Ts of the audio data string is the same. As a result, the display switching interval of the image data is also constant at Ts.

FIG. 9 shows an example in which the length of the audio data string included in one data block is different for each data block, the reproduction time of the audio data string is different, and therefore the display switching interval of the frame data is not constant. is there. Further, it is an example in which a plurality of data blocks are collectively read from the optical disc, and further an access operation is performed to read out non-contiguous data blocks.

FIG. 9A shows a state of reading and waiting for sector data, FIG. 9B shows a read data block, and FIG. 9C shows a state of reproducing images and sounds. .. In the reading in the period of Ts1, as shown in FIG. 7B, three data blocks DB (i) to
DB (i + 2) is read collectively. Then, as shown in FIG. 7C, the audio data strings AR (i) to AR (i + 2) and AL (i) are continuously arranged along the time axis.
~ AL (i + 2) is output, and image data p (i) to P (i + 2) are output according to the output of the audio data sequence.
Is switched and displayed. Audio data sequence AR (i)
-AR (i + 2), AL (i) -AL (i + 2), and frame data p (i) -P (i + 2) are T respectively.
It is output at a time interval of i to Ti + 2.

Audio data string AR (i + 2), AL
Before the output of (i + 2) and frame data p (i + 2) is completed, the next data block DB (i + 3), D
The read operation of B (i + 4) starts. Here, if the arrangement of the audio data string on the data block is arranged such that arc and alc are alternately arranged after the image data pc as shown in FIG. 5F, then the arrangement shown in FIGS. As can be seen from the figure, even if the data block DB (i + 3) is being read, if the compressed frame data pc (i + 3) in the data block DB (i + 3) is read, the expanded frame data p (i + 3) is displayed. The audio data strings AR (i + 3) and AL (i + 3) can be read out and reproduced while expanding. In addition,
After the reading of the data block DB (i + 4) is completed, the access operation is performed, and then the data block DB (j) which is not continuous is read. When reading non-contiguous data blocks, the data block DB
While knowing the distance from (i + 4) to DB (j), accessing and confirming the data block number from the sector header shown in FIG. 6, the target data block DB
Move to (j).

The signal flow in FIG. 9 is shown in FIG.
A sector corresponding to one or a plurality of data blocks is read from the optical disc 700 by the pickup 702. The data processed by the signal processing circuit 708 is sent to the header detection circuit 722, and the sector header is separated. From the sector header information, the controller 718 determines the data block number of the data, the position of the data in the data block, and the type of image and audio data. Then, the data separation circuit 726 is instructed to distribute the compressed image data or the left and right compressed audio data data. Left and right compressed audio data ARc and ALc are audio data memory 7
28, the compressed frame data pc is decompressed to p by the image decompression circuit 738 and stored in the frame memory 740.

The controller 718 continues this operation until the data of one or more data blocks is read. At the same time, it is checked that the output of the previously read data block ends, and immediately after the end, the output command of the data block read this time is issued. In this case, when the data arrangement in the data block is set such that the frame data is located at the top as shown in FIG. 5F, when the frame data is decompressed and stored in the frame memory 740, Even while the data is being transferred to the audio data memory 728, the display of the frame data in the frame memory can be started, and the audio data can be sequentially expanded and reproduced. Controller 71
8 issues an output start command to the audio data memory 728 and the frame memory 740. In response to the output start command, the image controller 742 causes the frame memory 74
The frame data p stored in 0 is sent to the LCD controller 746, and the LCD panel 748 displays an image. The image controller 742 is the controller 7
The image data p is continuously sent to the LCD controller 746 until a display frame switching command is issued from 18. The compressed audio data strings ARc and ALc stored in the audio data memory 728 are sequentially sent to the audio decompression circuit 730 at a time interval of 1 / Na at a timing created by the synthesizer 916 in response to an output start command from the controller. .. The decompressed audio data ar and al are converted into analog signals by the D / A converter 732 and output from the speaker (or headphone) 736 through the analog amplifier 734.

When the reproduction of a certain data block DB (i) is completed, the controller 718 next data block D
Instruct to reproduce B (i + 1). Then, before the reproduction of all the data blocks read from the optical disc is completed, the servo control circuit 714 is used to instruct the pickup up 702 in the standby state to read the next data block. At that time, an access operation may be performed to read a data block that is not continuous.

As described above, it is also possible to read a plurality of data blocks collectively and sequentially reproduce those data blocks. Also, the audio data string in a certain data block is sequentially reproduced along the time axis at every sampling interval, and is included in the data block.
The image data for the screen is continuously displayed while the audio data string is being reproduced, and at the same time as the reproduction of the audio data string of the next data block is started, the image is also switched to the image data included in the next data block. This is the same as in FIG. In FIG. 9, the lengths of the audio data strings included in one data block are different, the reproduction times of the audio data strings are different, and as a result, the display switching intervals of the image data are also varied.

When it is desired to suspend the reading of data, the number of the last data block reproduced is stored, and when restarting, the data block of the next number may be accessed and reproduced from there. The data block number can be known by looking at the sector header shown in FIG.

In some cases, the image data and audio data stored on the optical disk may be fast-forwarded instead of being reproduced entirely along the time axis. One method is to play back the data blocks one by one using the above-described access operation. However, although audio information is not necessary, there are many cases where it is desired to fast-forward and view only the image. An example thereof will be described with reference to FIGS.

In FIG. 10, data blocks are successively read out and only the image data in them are switched and displayed in the order in which they are read out. When the sectors are continuously read as shown in FIG. 10A, the data blocks are continuously read as shown in FIG. This data block has a compressed image data pc and a compressed audio data sequence AR as shown in FIG.
Although it consists of c and ALc, the compressed audio data sequence is not reproduced, and only the image data p is switched and displayed in the order of reading. The situation is shown in FIG. The same figure (e)
As shown in, the display is performed as soon as a certain image data p (i) is read, and the display of p (i) is continued until the next image data p (i + 1) is read.

In the normal reproduction, one image is displayed only during the time when the audio data of the data block is reproduced, as shown in (f) of the figure. Therefore, even if the access operation is repeated and the data block is reproduced intermittently. Even if it is performed, the reproduction time of one data block does not change, and only the thinned image data can be seen. On the other hand, with the method of FIG. 10, all images can be viewed at high speed.

In the operation of FIG. 10, if the output from the audio data memory 728 to the audio decompressor 730 in FIG. 7 is not performed and the frame data is read, the display is switched immediately and output to the LCD panel. good. This operation can be easily performed by the program of the controller 718.

In FIG. 11, the frame data portion of the data block is read out intermittently while performing the access operation, and the frame data is switched and displayed in the order of reading. As shown in FIG. 11A, the read and access of the sector data is repeated, and only the frame data at the head of one data block is intermittently read as shown in FIG. 11B. That is, although the entire data block originally has the length shown in FIG. 6C and it takes time to read that much, but if the data block is read and then the beginning of the next data block is accessed, the access time is However, the time required to read the audio data string of the data block can be saved. FIG. 11D shows how the image data of the data block is read. As shown in FIG. 11 (e) and FIG. 11 (f), when a certain image data p (i) is read, it is displayed immediately,
P until the next image data p (i + 1) is read
Continue to display (i). Since the access operation is performed and only the image data portion of the data block is picked up, the image can be viewed at a higher speed than the method shown in FIG.

In the operation of FIG. 11, the read data is sent to the header detection circuit 722 in FIG. 7, the attribute of the data is known from the header information, and the data separation circuit 72 is detected.
6. Write to frame memory 740 through image decompressor 738. Further, the head position of the next data block is known from the number of sectors of the data block written in the header information and the sector number, and when the reading of the frame data is completed, the next data block is accessed. The frame data written in the frame memory 740 is displayed on the LCD panel 748 immediately after the writing is completed. This operation is performed by the program of the controller 718.

FIG. 12 is a display example of image data on the LCD panel. FIG. 7A shows an example in which one image data is displayed on the entire panel, and FIG. 9B shows an example in which the panel is divided into four and four images A to D are displayed. The configuration of these display forms is performed by the image controller 742 according to a command from the controller 718 in FIG. 7.

FIG. 13 is a block diagram showing an embodiment of a master cutting device for manufacturing the master of the above optical disk. An argon gas laser 1324 is used as a light source, and the emitted light from the laser light source 1324 is modulated by an optical modulator (EOM: Electro Optical Modulator) 1326 by the Pockels effect, and a mirror and an objective lens are linearly fed at a constant speed. A pit row is spirally formed on the master disk coated with the photoresist agent.

Audio information of both left and right channels is AD
The left and right audio data strings AR and AL are sampled by the converter 1300. Further, the audio data is compressed by the audio compressor 1302 into compressed audio data strings ARc and ALc.
4 is temporarily stored. The image information P is the image compressor 1312.
Then, the image is compressed into a compressed frame data sequence Pc, which is temporarily stored in the image data memory 1314.

The controller 1320 receives the image capture timing signal and receives the audio data memory 1304.
Is instructed to start storing compressed audio data, and the image data memory 1314 is instructed to store one frame of compressed frame data. The compressed frame data and the compressed audio data captured by the time when the next timing signal arrives form one data block. According to the next timing signal, the audio data memory 1304 and the image data memory 131
4 is instructed to send the stored information to the mixer 1306, and at the same time, it is instructed to start storing the next audio data and frame data. The controller 1320 also instructs the header generator 1322 to generate a sector header and send it to the mixer 1306.
The mixer 1306 has a sector header, compressed frame data,
The compressed audio data is combined and edited and mixed into a data block of the format shown in FIG. Mixer 1306
Output data is added with an error correction code (ECC: error correct code) called Reed-Solomon code in the ECC generation circuit 1308, and the output of the ECC generation circuit 1308 and the output of the sub code generation circuit 1316 are formatted by the formatter 1310 in the DAD format. Edited by EFM
After being converted into a pit train signal by the modulation circuit 1318, it becomes an optical modulation drive signal of the EOM 1326.

[0052]

According to the present invention, an information recording / reproducing system capable of recording / reproducing high-quality, long-time, time-series image, sound and music data on an optical disc such as a DAD, a reproducing apparatus therefor, and a reproducing apparatus therefor. The master cutting device can be provided.

According to the present invention, it is possible to record and reproduce long-time moving image and sound information as time-series still image and sound information. As a result, it is possible to record the image information for a long time and the audio information associated therewith in the DAD without reducing the effective information amount. Further, it is possible to handle still images and audio information related thereto as a group, and it is easy to control reproduction and display of images and audio.

[Brief description of drawings]

FIG. 1 is a diagram showing a method of extracting image data.

FIG. 2 is a diagram showing a configuration of a data block.

FIG. 3 is a diagram showing a data format of an optical disc.

FIG. 4 is a diagram showing data on an optical disc.

FIG. 5 is a diagram showing a structure of a data block.

FIG. 6 is a diagram showing a structure of a sector header.

FIG. 7 is a block diagram showing an embodiment of a reproducing device.

FIG. 8 is a diagram showing timings of reading and reproducing data.

FIG. 9 is a diagram showing timings of reading and reproducing data.

FIG. 10 is a diagram showing a fast-forward method.

FIG. 11 is a diagram showing a fast-forward method.

FIG. 12 is a diagram showing a screen display method.

FIG. 13 is a block diagram showing an embodiment of a master cutting device.

[Explanation of symbols]

700 ... Optical disc, 702 ... Pickup, 704 ...
Waveform shaping circuit, 706 ... Synchronization detection circuit, 708 ... Digital signal processing circuit, 710 ... Rotation motor, 712 ... Rotation control circuit, 716 ... PLL, 718 ... Controller, 7
20 ... Subcode detection circuit, 722 ... Header detection circuit,
724 ... Synthesizer, 726 ... Data separation / extraction circuit,
728 ... Audio data memory, 730 ... Audio decompressor, 732 ... DA converter, 734 ... Amplifier, 7
36 ... Speaker, 738 ... Image decompressor, 740 ... Frame memory, 742 ... Image controller, 746 ... LCD
Controller, 748 ... LCD panel, 1300 ... AD
Converter 1302 ... Audio compressor, 1304 ...
Audio data memory, 1306 ... Mixer, 1308
... ECC generation circuit, 1310 ... Formatter, 1312
... image compressor, 1314 ... image data memory, 1316
... Subcode generation circuit, 1318 ... EFM modulator, 13
20 ... Controller, 1322 ... Header generation circuit, 13
24 ... Ar laser, 1326 ... EOM.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI technical display location // H04N 7/12 4228-5C (72) Inventor Masatoshi Otake 1-280, Higashi Koikeku, Kokubunji, Tokyo Hitachi, Ltd. Central Research Laboratory (72) Inventor Takeshi Maeda 1-280, Higashi Koigokubo, Kokubunji, Tokyo Metropolitan Research Center, Hitachi, Ltd.

Claims (19)

[Claims] 1. Time-series information composed of a set of information-compressed image information and audio information related thereto is recorded on an information recording medium, the time-series information on the information recording medium is read out, and information is expanded. An information recording / reproducing method characterized by reproducing and displaying. 2. The information recording / reproducing method according to claim 1, wherein synchronization and header information are attached to each of the set of the image information and audio information related thereto. 3. The information recording / reproducing method according to claim 2, wherein in the set of information, the image information compressed in information is arranged earlier than the audio information in time. 4. The information recording / reproducing method according to claim 2, wherein in the time-series information, the length of audio information in each set of information is the same. 5. The information recording / reproducing method according to claim 2, wherein in the time-series information, the length of audio information in each set of information is different. 6. The information set of the time-series information is read from the optical information recording medium, the information is decompressed, and continuously reproduced and displayed in a time-series manner. An information recording / reproducing method according to any one of the above. 7. The information recording / reproducing method according to claim 2, wherein a set identification signal for identifying each information set is added to the information set of the time series information. .. 8. The information recording / reproducing method according to claim 7, wherein by specifying the set identification signal, a set of information corresponding to the set identification signal is selectively read, information is expanded and reproduced. 9. When interrupting reproduction of the time series information,
The set identification signal of the last set of information that has been reproduced is stored, and when restarted, the set of information of the stored set identification number,
9. The information recording / reproducing method according to claim 8, wherein reproduction is performed from a set of information having a number next to the stored set identification number. 10. The method according to claim 1, wherein the time-series information is continuously read out, the audio information is not reproduced, and only the image information is expanded and displayed. Information recording and reproducing method. 11. A method according to claim 1, wherein only image information is selectively read out from the set of the time-series information and is decompressed and displayed. Information recording / reproducing method. 12. The information recording / reproducing method according to claim 1, wherein a plurality of pieces of image information read out from the information recording medium and expanded in information are arranged and displayed in one screen at the same time. 13. A method of processing a moving image and audio data related to the moving image, wherein one frame at a predetermined timing is extracted from a moving image data sequence consisting of a set of frames, and extraction of the audio data is started at the above timing. A data processing method, characterized in that one block is composed of audio data and the data of one frame described above, which is recorded and reproduced by the timing of. 14. The data processing method according to claim 13, wherein the moving image data of one frame is compressed and recorded. 15. The data processing method according to claim 13, wherein the one frame of moving image data is repeatedly displayed during the timing and reproduced as a still image. 16. Information comprising a set of information-compressed still image information and audio information related thereto is recorded, and header information is attached to each of the still image information and audio information related thereto. An information recording medium characterized by the above. 17. The information recording medium according to claim 16, wherein the information is recorded as an array of microscopic uneven holes. 18. The set of information is recorded in the order of still image information and audio information.
6. The information recording medium described in 6. 19. An information reproducing apparatus for reproducing an information recording medium on which block information composed of a set of information-compressed still image information and audio information related to the information is reproduced, and information reproducing means for reading the block information, and the block. A data separation circuit that separates information into still image information and audio information, an audio data memory that stores the audio information, an audio expander that expands the audio information from the audio data memory, and the still image information. Information having an image decompressor and a frame memory for accumulating decompressed still image information, and outputting the still image information in the frame memory while the information in the audio data memory is being output. Playback device.