JPH08263504A - Multimedia reproducing device - Google Patents

Abstract

PURPOSE: To provide the multimedia reproducing which can reproduce information to be reproduced apparently from the start to the end in the same time as the prescribed reproduction time of the information to be reproduced even when the reproducing speed performance of hardware put in charge of the reproduction is lower than the prescribed reproducing speed of the information to be reproduced. CONSTITUTION: The multimedia reproducing device is equipped with a storage means 21 which stores information regarding the reproducing speed performance of reproducing means 3 and 4 and information regarding two out of a reproduction time, a reproducing speed, and the number of frames that are optionally selected and a control means 22 which controls the reproducing means 3 and 4 so that the reproduction of each piece of information to be reproduced is completed in the same time as the reproduction time predetermined for the piece of information to be reproduced when respective pieces of information are reproduced on the basis of the information stored in the storage means 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia reproducing apparatus for reproducing a plurality of reproduced information.

[0002]

2. Description of the Related Art It is considered that there is a moving image which needs to be displayed at a rate of 30 frames per second and has a reproduction time of 10 minutes. In the conventional multimedia reproducing apparatus, the hardware (CPU, bus, etc.) in charge of reproducing this moving image
Is a performance that can display only 10 frames per second,
It takes 30 minutes to reproduce and display all the moving images.

[0003]

As described above, if the performance of the hardware in charge of reproduction does not match the display rate of the image to be reproduced, there will be restrictions on the hardware used or the image to be reproduced.

In other words, the hardware in charge of reproduction is 1
If it is a performance that can display only 10 frames per second,
A moving image that must display 30 frames per second cannot be used. On the contrary, in order to use a moving image that requires display of 30 frames per second, it is necessary to prepare hardware having a performance capable of displaying 30 frames per second.

According to the present invention, even when the reproduction speed performance of the hardware in charge of reproduction is lower than the specified reproduction speed of the reproduced information to be reproduced, the reproduction time of the reproduced information is the same as the specified reproduction time of the reproduced information. It is an object of the present invention to provide a multimedia reproducing device capable of apparently reproducing reproduced information from the beginning to the end.

[0006]

A multimedia reproducing apparatus according to the present invention comprises a data accumulating means for accumulating a plurality of kinds of reproduced information and a reproducing means for reading and reproducing the reproduced information from the data accumulating means. In the multimedia reproducing apparatus, information on the reproducing speed performance of the reproducing means, and information on at least two arbitrarily selected from the reproducing time, the reproducing speed and the number of frames which are predetermined for each reproduced information. On the basis of the information stored in the storage means and the information stored in the storage means, each reproduction target information is reproduced at the same time as the reproduction time predetermined for each reproduction target information. It is characterized in that it is provided with control means for controlling the reproducing means so that the reproduction of the information is completed.

The above-mentioned control means, for example, when reproducing each reproduced information, reproduces each reproduced information at the same time as a predetermined reproduction time for each reproduced information. The one for supplying the command for thinning the reproduction information and the reproduction speed command to the reproducing means is used.

As the reproducing means, for example, one having a read control section for controlling the reading of the reproduced information from the data accumulating means and a reproducing section for reproducing the reproduced data read by the read control section is used. Used. In this case, the control means reads out the information to be reproduced so that the reproduction of the information to be reproduced is completed at the same time as a predetermined reproduction time for each information to be reproduced. A control unit that supplies control information regarding the thinning rate of the reproduced information to the control unit and supplies control information regarding the reproduction speed to the reproducing unit is used.

[0009]

In the storage means, information on the reproduction speed performance of the reproduction means, and information on at least two arbitrarily selected from the reproduction time, the reproduction speed, and the number of frames, which are predetermined for each piece of reproduced information, Remembered Then, based on the information stored in the storage means, when each piece of reproduced information is reproduced, the reproduction of each piece of reproduced information is completed at the same time as the predetermined reproduction time for each piece of reproduced information. Thus, the reproducing means is controlled.

[0010]

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

FIG. 1 shows a multimedia reproducing apparatus.

The video data storage unit 1 stores a plurality of types of video data. Video data read control unit 3
Thus, the video data stored in the video data storage unit 1 is read. The read video data is converted by the video reproduction unit 4 into a video signal reproduced on the video display unit 5. The obtained video signal is sent to the video display unit 5 and displayed.

The reproduction speed management unit 2 includes a storage unit 21 and a thinning and reproduction speed control unit 22. Storage unit 2
Reference numeral 1 relates to information on the performance of the playback speed of the playback device, and playback speed (specified playback speed), playback time (specified playback time) and number of frames (specified number of frames), which are predetermined for each piece of playback target information Information is stored.

The thinning-out and reproduction speed control unit 22 calculates the thinning-out ratio and the reproduction speed based on the information stored in the storage unit 21, and controls the video data read control unit 3 and the video reproduction unit 4 based on the calculation result. Control.

2 of the contents of the storage unit 21 of the reproduction speed management unit 2
Two examples are shown in FIGS. 2 and 3, respectively. FIG. 2 shows an example of the case where the playback speed performance of the playback device is 30 frames / second (hardware A), and FIG. 3 shows the playback speed performance of the playback device is 1
An example of the case of 0 frame / second (hardware B) is shown. Further, in each example, the video data storage unit 1 stores the video software A and the video software B.

Both software A and software B are images for 10 minutes, but the specified playback speed of software A is 10 per second.
The specified playback speed of frames and software B is 30 frames per second.

(1) Description of operation when the reproduction speed performance of the hardware responsible for reproduction of the multimedia reproducing apparatus is 30 frames / second as shown by the hardware A in FIG.

When the reproduction speed performance of the hardware responsible for the reproduction of the multimedia reproducing apparatus is 30 frames / sec as shown by the hardware A in FIG. 2, it is necessary for both the software A and the software B. It has the performance that can satisfy the required reproduction speed. For this reason, the thinning-out of the reproduction speed management unit 2 and the reproduction speed control unit 22 give a command to the video data read control unit 3 to read all the video data. As a result, 6000 frames are read when playing the software A, and 18000 frames are read when playing the software B.

The decimation and reproduction speed control unit 22 of the reproduction speed management unit 2 issues a command to the video reproduction unit 4 to reproduce the software A at 10 frames per second, and reproduces the software B. A command is issued to the video reproduction unit 4 to perform reproduction at 30 frames per second.

By carrying out such control, all the frames of the image in both software A and software B are reproduced at the same time as the specified reproduction time of each software.

(2) Description of the operation when the reproduction speed performance of the hardware responsible for the reproduction of the multimedia reproducing apparatus is 10 frames / second as shown in hardware B in FIG.

When the reproduction speed performance of the hardware responsible for the reproduction of the multimedia reproducing apparatus is 10 frames / second as shown by the hardware A in FIG. 2, only 10 frames can be displayed per second. Therefore, the software A has a performance that can satisfy the required reproduction speed, but the software B does not have the performance that can satisfy the required reproduction speed.

First, the thinning-out and reproduction speed control unit 22 of the reproduction speed management unit 2 reproduces at 10 frames per second regardless of the types of software A and B.
Control.

The control of the video data read control unit 3 is different between the case of reproducing the software A and the case of reproducing the software B. That is, when the software A is played back, the playback speed performance of the hardware and the specified playback speed of the software A match, so the video data read control unit 3 is instructed to read all video data (6000 frames). Give out. As a result, all the frames of the software A are reproduced at the same time as the specified reproduction time of the software A.

On the other hand, when the software B is reproduced, the speed reproduction performance of hardware cannot keep up with the specified reproduction speed of the software B. In this example, the speed reproduction performance of hardware is 1/3 of the specified reproduction speed of software B. Therefore, the decimation and reproduction speed control unit 22 of the reproduction speed management unit 2 determines that the number of frames actually reproduced is the total number of frames of the software B (180
A command for thinning out the software B and reading it out to 6000, which is 1/3 of 00) is issued to the video data read control unit 3.

In response to this command, the video data read-out control section 3 outputs, for example, 2 in 3 frames as shown in FIG.
The frames of software B are thinned out and read out at the rate of frames. As a result, 6000 frames are reproduced at 10 frames / second, so that the soft B is reproduced at the same time as the specified reproduction time of the soft B.

By storing the speed reproduction performance of the hardware in advance as described above, even if the hardware does not have the performance capable of reproducing at the specified reproduction speed of the software, the same time as the specified reproduction time of the software is obtained. So, you can play the software from the beginning to the end. That is, the restrictions imposed by the playback speed performance of the hardware used and the specified playback speed of the software to be played back are removed.

In the above embodiment, the software B is simply skipped every two frames and the software B is read. However, the number of skipped frames is randomly changed in consideration of the nature of the image to be reproduced, and the final display is performed. The video data read control unit 3 may be instructed to set the number of frames to be performed to 6000.

[0029]

According to the present invention, even when the reproduction speed performance of the hardware in charge of reproduction is lower than the specified reproduction speed of the reproduced information to be reproduced, the same reproduction time as the reproduced information is reproduced. Then, the reproduced information can be reproduced from the beginning to the end in appearance.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a multimedia playback device.

FIG. 2 is a schematic diagram showing an example of stored contents of a storage unit 21 in a reproduction speed management unit 2.

FIG. 3 is a schematic diagram showing another example of stored contents of a storage unit 21 in the reproduction speed management unit 2.

FIG. 4 is a schematic diagram showing a frame of software B that has been thinned out and read.

[Explanation of symbols]

 1 video data storage unit 2 playback speed management unit 3 video data read control unit 4 video playback unit 5 video display unit 21 storage unit 22 thinning and playback speed control unit

Front Page Continuation (72) Inventor Kazuhiro Sawaike 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (4)

[Claims] 1. A multimedia reproducing apparatus comprising a data accumulating means for accumulating a plurality of kinds of reproduced information and a reproducing means for reading and reproducing the reproduced information from the data accumulating means, the reproducing speed performance of the reproducing means. Related information, and storage means for storing information on at least two arbitrarily selected from the reproduction time, the reproduction speed, and the number of frames, which are predetermined for each reproduced information, and the storage means. When reproducing each of the reproduced information based on the information, the reproducing means is controlled so that the reproduction of each reproduced information is completed at the same time as the predetermined reproduction time of each reproduced information. A multimedia playback device comprising: 2. The reproducing means comprises a read control section for controlling the reading of the reproduced information from the data storage means, and a reproducing section for reproducing the reproduced data read by the read control section. 1. The multimedia playback device described in 1. 3. The control means reproduces the reproduced information so that the reproduced information is completed at the same time as a predetermined reproduction time for each reproduced information. The multimedia reproducing apparatus according to claim 1, wherein a command for thinning out information and a reproducing speed command are supplied to the reproducing means. 4. The reading means reads the reproduction information so that the reproduction of the reproduction information is completed at the same time as the reproduction time predetermined for the reproduction information when reproducing the reproduction information. 3. The multimedia reproducing apparatus according to claim 2, wherein the control unit supplies control information regarding a thinning rate of information to be reproduced and control information regarding a reproduction speed to the reproducing unit.