JPH034683A - Method for automatically displaying still picture with sound - Google Patents

Abstract

PURPOSE:To considerably simplify the generation of a user program by automatically deciding respective display timing based on picture display time and the number of still pictures to be displayed. CONSTITUTION:Display time C per picture is calculated based on the start time P and the termination time Q of picture display in which time information included in sub code data that a CD-ROM device 24 reads is set to be reference, and the number N of the pictures. Respective display time C1-CN to respective pictures 1-N are decided, and they are stored in RAM 16, for example. Then, picture data of the picture which is to be displayed at first is read into a frame memory 42. Whether time obtained by adding the display time Ci of the picture (i) to start time P agrees with present time T in a time code which is read from sub-code data of CD is judged. When they agree, the i-numbered still picture is displayed in the monitor 52.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for automatically displaying still images together with audio, and particularly for displaying a plurality of high-definition still images in the background, for example, used in art museums, museums, or Joe rooms. The present invention relates to a method for automatically displaying still images together with audio in an image file system that automatically displays and displays sequentially during the playback time of audio such as ground music.

[Prior art]

High-definition images can reproduce high-definition images, but each screen requires approximately 6 MB of data, and even the fastest optical disk device takes, for example, 12 seconds (0.5 MB) to read out.
M bytes/second). Therefore, when performing an automatic exhibition in which each still image is played back at an equal timetable with a fixed audio playback time using a conventional high-definition still image file system, each still image is displayed in consideration of the above-mentioned readout time. I had to program the timing.

[Problem to be solved by the invention]

Therefore, when displaying images automatically at an even timetable in a conventional image file system, it is necessary to specify the display timing for each still image using a user program, making the creation of the user program very complicated.

Therefore, the main object of the present invention is to provide a method for automatically displaying still images along with audio, which can automatically display a plurality of still images along with audio at equal time intervals using a simple user program.

[Means to solve the problem]

Simply put, the present invention provides an image file system that displays image data read out from an image playback device as a still image on a monitor and also plays back audio using an audio playback device. (h) When the display timing is reached based on the time information from the audio playback device, determine the display timing for displaying the still images with equal playback time based on the number of still images to be displayed. This is a method of automatically displaying still images along with audio by inputting image data corresponding to the still images into a display memory.

[Effect]

Based on the image display time and the number of still images to be displayed within that time, the display timing at which each still image should be displayed is determined by, for example, dividing the image display time by the number of still images to be displayed. be done. On the other hand, time information of the reproduced audio is obtained from the audio reproducing device. By determining whether or not the determined display timing has arrived based on this time information, and inputting image data corresponding to the still image to be displayed when the display timing arrives into the display memory, each still image can be displayed for the audio playback time. will be displayed (exhibited) in an even timetable within

(Effects of the Invention) According to the present invention, each display timing is automatically determined based on the image display time and the number of still images to be displayed, so display timing can be specified for each image as in conventional playback devices. Therefore, creating a user program becomes very easy.

Further, according to the present invention, the image data for each still image is input into the display memory when the display timing is reached, so that the reproduction (display) timing may be shifted depending on the amount of image data. There isn't. In other words, in order to reproduce a BTA (Broadcast Technology Development Council) standard full-pant high-definition image (pixel count is 1920 x 1035) as an RGB signal (digital) from an ISO standard 13cm write-once optical disc as an image recording medium, one screen requires approximately 6M bytes. The amount of data required is 12 seconds or more, for example, since the reading time for even the fastest optical disc is 0.5 Mbytes/second. In such a case, it is difficult to set the timing because the display timing will be shifted unless the time required for reading is taken into consideration. On the other hand, according to the present invention, it is only necessary to read the image disk from an optical disk or the like in advance and, when the display timing comes, simply transfer the image data from the frame memory to the display memory, so the above-mentioned readout time is taken into account. You don't have to. Therefore, a predetermined number of still images can be displayed automatically and sequentially within a predetermined audio playback time without fail.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

〔Example〕

FIG. 2 is a block diagram showing one embodiment of the present invention.

The image file system 10 of this embodiment includes a computer 12 that controls the operation of the entire system.The computer 12 includes a CPU 14, and this CPU 4 has an R
OM/RAM 16 and hard disk 18 are connected. A system program for control is stored in the ROM of the ROM/RAM 16, and the RAM is provided with various flag areas and counter areas necessary for control, and also temporarily stores data. The hard disk 18 stores program data of a user program input by operating the keyboard 20.

An I10 interface 22 is connected to the computer 12, and a CD-ROM is connected to the I10 interface 22.
A device 24 is connected. The CD-ROM device 24 is a device for playing a compact disc (CD: 11 not shown), and is controlled by a CD driver 26.

The CD-ROM device 24 includes SCSI (
SIIual Computer System In
te'rface) 2B is built-in. Therefore, the CD-ROM device 24 and the I10 interface 22
For example, 8-bit parallel data can be sent and received between the 5C3I bus and the 5C3I bus. That is, C
The 5C3I28 of the D-ROM device 24 is connected to the CPU 14 of the computer 12 through the I10 interface 22.
Play from.

Control data specifying modes such as stop, rewind, and fast forward, addresses, and track numbers are given. On the other hand, subcode data such as time information and track number read from the CD is sent to I10 via SCst2g.
It is input to interface 22 , ie, computer 12 .

Note that the audio data from the CD played by the CD-ROM device 24 is converted into an analog signal and sent to the amplifier 3.
0 and is output as audio from the speaker 32.

Further, a clock generation circuit 34 connected to the I10 interface 22 and receiving control data for clock generation from the computer 12 divides the basic clock from the reference oscillator 36 or converts the timing using a timing ROM or the like to generate the necessary data as appropriate. Forms clock signals and R/W signals. Note that the R/W signal is a signal for instructing reading or writing to the frame memory 42 or display memory 46, which will be described later.

Additionally, the image interface 38 is provided with sector designation data from the computer 12 through the I10 interface 22. The image interface 38 controls the optical disk device 40 to read desired image data specified by the sector designation data from the optical disk.

The image data is then transferred to the frame memory 42 as pit rose data in synchronization with a clock signal provided from the clock generation circuit 34.

In this embodiment, a write-once optical disc is used as the optical disc, and a high-definition image is recorded on the optical disc.
Recorded with A standard full punt.

The image data from the optical disk device 40 is RGB
The data is output as data and temporarily stored in the frame memory 42.

The frame memory 42 writes the image data manually input from the image interface 38 to the address specified by the address control circuit 44 based on the R/W signal given from the clock generation circuit 34. therefore,
The address control circuit 44 includes an I10 interface 22
Address preset data is provided from the computer 12 via the computer 12. Then, the specified address is incremented every time a clock signal is applied from the clock generation circuit 34. In this way, image data of a still image to be displayed next on the monitor 52, which will be described later, is stored in the frame memory 42.

The image data written in the frame memory 42 is transferred to the display memory 46. In this embodiment, the timing of transfer from frame memory 42 to display memory 46 is controlled by computer 12 based on subcode data obtained by playing a CD with CD-ROM device 24.

The display memory 46 is supplied with an R/W signal from the clock generation circuit 34 that instructs the writing or reading of image data. The write or read address of the display memory 46 is specified by write address data and read address data given from the address control circuit 48. The address control circuit 48, like the address control circuit 44,
The image data to be displayed is constantly read out. Along with this reading, a synchronizing signal is applied from address control circuit 48 to clock generation circuit 34, I10 interface 22, and D/A converter 50.

The image data read from the display memory 46 is input to the D/A converter 50, and the D/A converter 50 converts the image data based on the synchronization signal given from the address control circuit 48 and the sampling clock given from the clock generation circuit 34. The image data is converted into an analog signal of the ROB.

In this way, the image data read from the display memory 46 is displayed on the high-definition monitor 52.

Here, with reference to the block diagram shown in FIG. 2 and based on the flow diagram shown in FIG. 1, the operation or operation of the image file system 10 in the case of automatic exhibition will be described.

In the first step 311 in FIG. 1, an image is displayed based on the start time P and end time Q of image display and the number N of images based on the time information included in the subcode data read by the CD-ROM device 24. The display time C per image is calculated. For example, if the start time P is 0 minutes and 12 seconds, the end time Q is 10 minutes and 12 seconds, and the number of images N is 40, the display time C of each image is calculated as follows.

C = (Q-P)/N = (10 minutes 12 seconds - 0 minutes 12 seconds) /40 = 15 seconds Therefore, in this case, as shown in Figure 3, the display time C of the first image 1 is 0 minutes. 15 from 12 seconds to 0 minutes 27 seconds
It will be seconds. The display time of the second image 2 is 15 seconds from 0 minutes 27 seconds to 0 minutes 42 seconds, and the display time of the last image 40 is 15 seconds from 9 minutes 57 seconds to 10 minutes 12 seconds.
In this way, the display times C1 to CN of each image 1 to N are determined, and are stored in the RAM 16 (FIG. 2), for example.

Therefore, the time at which still images i should be displayed in an arbitrary order from the image display start time P is set as C1. In this example,
Let C1=CX (i-1). And step Sl
At step S1, the number i of the image is set to "1". At the same time, at step S11, the image data of the image to be displayed first is read into the frame memory 42.

Further, in step 311, the CD-ROM device 24 is driven, a CD (not shown) is played back, and sound such as background music is output from the speaker 32.

Next, in step 313, it is determined whether the display timing for image i has arrived. That is, step 3
In step 13, it is determined whether the start time P plus the display time Ci of the image i matches the current time T in the time code read from the subcode data of the CD.

When a match is confirmed, that is, when it is determined that the display timing has come, the process proceeds to step 315.

For example, for the first image 1, display time C1
However, in the previous example, it is 0 minutes and 12 seconds, so when 0 minutes and 12 seconds have passed from the start, the process advances to step 315.

In step S15, the i-th still image is displayed on the monitor 5.
Displayed as 2. Step S for the first time from step 311
15, in step 311 the number i is “
°1", the first image 1 is displayed. That is, in the previous step Sll, I1
When sector designation data designating the image l is applied from the computer 12 to the image interface 38 through the zero interface 22, the first image data is read out from the optical disk device 40 and stored in the frame memory 42 in advance. The image data is transferred from the frame memory 42 to the display memory 46 in step S15, so that the first image is displayed on the monitor 52. As mentioned above, it takes 12 seconds for a high-definition still image to read the image data from the optical disk device 40 and transfer it to the display memory 46. Therefore, as shown in FIG. 3, the start time P is set to 0 minutes and 12 seconds. This 12 seconds takes into account the time required to transfer the image from the optical disk device 40 to the display memory 46.

In step 317, the image number i is updated, and in step 31
In step S19, it is determined whether the updated number i matches the last number N plus "1" (N+1).In other words, in step S19, it is determined whether there are no more images to display. do.

If there are still images to be displayed, proceed to the next step S2.
1, the image data of the image i to be displayed next is read out from the optical disk device 40 and stored in the frame memory 42.
Store in advance. That is, the above-mentioned readout time is required to read the image data from the optical disk device 40, and if you try to input the image data from the optical disk device 40 to the display memory 46 each time in step S15, the monitor 52 will not display the image data. The display will be shifted by the reading time. To solve this problem, when the image number i is updated, the image data of that number is read out from the optical disk device 40 and stored in the frame memory 42 in advance.

Then, when it is detected in step S13 that the timing to display the image data with the number i has come, in the subsequent step S15, the image data with the number i stored in advance in the frame memory 42 is transferred to the display memory 46. Just that is enough. By doing so, it is possible to eliminate the display timing shift caused by the readout time.

Note that when it is determined in step S19 that YES'', the operation ends after the display time of the last image N has elapsed.

FIG. 4 is a flow diagram showing the operation of another embodiment of the present invention. In the previous embodiment, the optical disk device 40
The uniform display time C for each image was determined without considering read errors and transfer errors until the read image data is transferred to the display memory 46. but,
In this embodiment, the display timing is determined in consideration of these errors.

In the first step S31 in FIG. 4, the sequence α of the correction time is corrected according to the number N of images to be reproduced.

(i=1 to N) is selected or calculated. The sequence α1 is
It was determined experimentally, and is expressed as follows, for example.

α, ・= α1 , αZr α3+”' α11−
1+α1=2.2,2. ...1, 1.1 Such margin time α can be determined as follows. In other words, even if there is a possibility that the initial playback of image 1 may vary by up to 1 second due to the occurrence of an error, the probability that such an error will occur continuously is extremely low, so at the beginning the time will vary by 2 seconds and 2 seconds. ,..., and the last two are both 1 second. In this way, the value of α1 can be reduced (
can do.

Next, in step S33, the display time C per image is calculated based on the image display start time P, end time Q, and number N of images, in the same manner as in the previous step S11.

After that, in step S35, the current time T is set to "-α1," and time counting starts from the current time T of -α. Note that α1 of -α is the correction for the first image data. As mentioned above, it is experimentally set to, for example, 2 seconds. Therefore, as shown in Figure 5, the start time of the first image display is originally P, but error correction is applied. Therefore, the display operation for the first image starts at time t1, which is 2 seconds before the display time P.Similarly, the display operation for each image is performed at correction times α2, α3, .
α4. It is accelerated by t2゜t3. t4.・
...becomes.

After that, in step S37, the next calculation is performed.

T'=T-CX (i-1)+α.

Time T' is a time for determining whether the display timing for images i in an arbitrary order has come. Therefore, in the next step S39, it is determined whether T' matches O'.

If a match is confirmed, the process proceeds to the next step S41, and the i-th image is displayed in the same manner as from step S15 in the previous embodiment.

It should be noted that the above-mentioned margin time or correction time may be controlled by any method other than the embodiment shown in FIG.

[Brief explanation of the drawing]

FIG. 1 is a flow diagram showing the operation of an embodiment of the present invention. FIG. 2 is a block diagram showing an embodiment of the present invention. FIG. 3 is an illustrative diagram showing the display timing of each image to explain the flowchart of FIG. 1. FIG. 4 is a flow diagram showing the operation of another embodiment of the present invention. FIG. 5 is an illustrative diagram showing the display timing of each image for explaining the flowchart of FIG. 4. In the figure, 10 is an image file system, 12 is a computer, 20 is a keyboard, 22 is a ■10 interface, 24 is a CD-ROM device, 32 is a speaker, 34
is a clock generation circuit, 38 is an image interface, 40
42 is an optical disk device, 42 is a frame memory, 44 and 48 are address control circuits, 46 is a display memory, and 52 is a monitor.

Claims (1)

[Scope of Claims] 1. In an image file system that displays image data read from an image reproduction device as a still image on a monitor and also reproduces audio using an audio reproduction device, (a) Image display time should be displayed. (b) when the display timing is reached based on the time information from the audio playback device; A method for automatically displaying still images along with audio by inputting image data corresponding to the still images into display memory. 2. The method of automatically displaying still images with audio according to claim 1, wherein in step (a), the display timing is determined based on the time obtained by dividing the image display time by the number of still images to be displayed. 3. The method for automatically displaying still images together with audio according to claim 1 or 2, wherein in step (a), the display timing is determined in consideration of the time required for error correction of the image data.