KR101287842B1 - Method for controlling file of moving picture - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video file playback control method. For example, when playing back various video files such as Divix files in a digital device such as a disc recorder, file information of a video file to be played and a codec installed in the device. Search and compare the performance information of (Codec), and down the resolution (Resolution) or the number of frames per second (FPS) of the video file to be played back to a data stream of the resolution or frame per second that the codec can accommodate, By performing a normal real-time playback operation, it is a very useful invention that it is possible to effectively prevent the video is irregularly interrupted or the playback operation is forcibly stopped automatically while playing the video file.

Digital Device, Frames Per Second, Resolution, Codec, Chip Maker Information

Description

How to control video file playback {Method for controlling file of moving picture}

1 illustrates a configuration of a general digital device,

2 illustrates an embodiment of the frame rate and resolution per second of the chip maker information applied to the present invention.

3 illustrates an embodiment of a frame rate and resolution per second of file information applied to the present invention.

4 is a flowchart illustrating an operation of a video file playback control method according to the present invention;

5 illustrates an embodiment in which the number of frames per second and the resolution are down according to the present invention.

[Description of Drawings]

10: DVD 11: optical pickup

12: DVD system 13: Hard disk

14: hard disk system 15: codec

16: C oil 17: OSD generator

18: memory

The present invention relates to a video file playback control method, for example, in a digital device such as a disc recorder, a video file playback control method for allowing the normal playback control of various types of video files such as Divix file (Divix file) It is about.

Generally, a digital device such as a disc recorder capable of playing various types of files stored in a storage such as a DVD or a hard disk (HDD), for example, as shown in FIG. Pick-up 11, DVD system 12, hard disk 13, hard disk system 14, codec 15, CPI 16, OSD generation unit 17, and memory 18 Etc. are comprised.

On the other hand, in the CPI 16, when a video file such as a Divix file, for example, any video file stored in the DVD 10 or the hard disk 13 is to be played at the user's request. The operation of the DVD system 12 or the hard disk system 14 is performed to read a data stream of a moving picture file recorded on the DVD 10 or the hard disk 13.

In addition, the codec 15 decodes the data stream read as described above, and restores and reproduces the original audio and video data. For example, the Divix file is generally used. In this case, the codec 15 has a resolution of '30' fps and '720x576' because it has properties of 'Frame Per Second (FPS)' and '720x576' Resolution. It is produced and installed with its decoding capability.

Accordingly, the codec 15 decodes the data stream of the video file read out through the DVD system 12 or the hard disk system 14 at a resolution of '30' fps and '720x576', thereby reproducing the original audio. And restore and play back video data.

However, for various types of video files, such as the recently produced Divix files, those with higher than '30' fps and '720x576' resolutions, such as '60' fps and '800x600' resolutions, etc. Cases are frequently issued. In this case, since the decoding operation cannot be normally performed in real time by the codec 15, an unstable state of an irregular disconnection is output or the reproduction operation is forcibly stopped automatically. Problems will arise.

Accordingly, the present invention was created to solve the above problems, and for example, when playing various video files such as Divix files in a digital device such as a disc recorder or the like, the file information of the video file to be played and By searching and comparing the performance information of the codec installed in the device, the resolution or the number of frames per second (FPS) of the video file to be played is appropriately down so that the normal real-time playback operation can be performed. To provide a video file playback control method, the purpose is to.

According to an aspect of the present invention, there is provided a video file playback control method comprising: searching and comparing file information of a video file to be played with performance information of a codec installed in a device; And according to the comparison result, two steps of down playing one or more of the resolution of the video file to be played or the number of frames per second.

In addition, the first step is to search the resolution and the number of frames per second recorded in the header area of the video file to be reproduced, and to search and compare the resolution and the number of frames per second among the performance information of the codec installed in the device, The performance information is stored and managed as chip maker information in a nonvolatile memory in the device.

In the second step, the decoding block of the codec installed in the device is controlled to reduce the number of frames per second, or the encoding block of the codec is controlled to reduce the resolution. Recording the data having the number and resolution down to the hard disk in the device; Instead, it further comprises the step of reading and reproducing.

Hereinafter, a preferred embodiment of a video file playback control method according to the present invention will be described in detail with reference to the accompanying drawings.

First, the video file reproduction control method according to the present invention can be applied to various types of digital devices, such as a disc recorder configured as described above with reference to FIG. 1.

On the other hand, the memory 18 of the digital device, a non-volatile memory such as a flash memory or EEPROM is used, for example, as shown in Figure 2, the memory 18 Chip Maker information indicating the performance of the codec is stored and managed.

In addition, the chip maker information includes information on the number of frames per second (FPS) and resolution of a data stream that can be normally processed in real time together with the unique identification information (Code ID) of the codec. In addition, '30' fps and '720x576' resolution information may be recorded.

In the digital device 16 of the digital device, as shown in FIG. 3, the header area of a moving image file such as a DivX file (for example, AAAA.avi) to be played is searched and recorded in the header area. Among the file information, the number of frames per second (FPS) and resolution information are checked.

In addition, the CPI 16 compares the frame rate per second and resolution information of the identified video file, and the performance information of the codec, that is, the frame rate per second and resolution of the codec retrieved from the chip maker information. .

In addition, as a result of the comparison, the frames per second (eg 60 fps) and the resolution (eg 800 x 600) information of the video file may include the frames per second (eg 30 fps) and the resolution (eg When 720x576 is exceeded, the CPI 16 controls a decoding block of the codec to control down the number of frames per second (for example, 30 fps).

In addition, by controlling an encoding block of the codec, down (e.g., 720x576) the resolution, and inputting it back into the decoding block, the audio and video data is normally reproduced through the codec 15 in real time. It can be, which will be described in detail as follows.

FIG. 4 is a flowchart illustrating a video file playback control method according to the present invention. For example, in the CPI 16 of a digital device configured as described above with reference to FIG. 1, a file is played by a user. When the request is made, the file play mode is set (S10). For example, a header area of a video file (eg AAAA.avi) such as a Divix file to be played is searched for and displayed in the header area. Within the recorded file information, the number of frames per second (FPS) and resolution information are retrieved (S11).

In addition, the CPI 16 searches for chip maker information stored in the memory 18, and searches for frame rate and resolution information per second that can be processed in real time by the codec (S12). The resolution is compared with the frames retrieved per second.

Meanwhile, as a result of the comparison, when real-time playback is possible (S13), for example, the number of frames per second and the resolution found in the header area of the file are '30' fps and '720x576', and the codec found in the chip maker information. If the frames per second and the resolution are '30' fps and '720x576', it is determined that the real-time decoding operation is possible, and the general reproduction operation is performed (S14).

On the other hand, if the comparison results show that real-time playback is not possible, for example, the number of frames per second and resolution found in the header area of the file are '60' fps and '800x600', and the frames per second of the codec found in the chip maker information. If the number and resolution are '30' fps and '720x576', it is determined that the real time decoding operation is impossible.

In the CPI 16, the codec 15 is operatively controlled and converted into a reproducible number of frames per second and a resolution (S15). For example, as shown in FIG. By controlling the decoding block of 15), the data stream read out at '60' fps is lowered to '30'fps, and the encoding block of the codec 15 is controlled to read the data at' 800x600 'resolution. The stream is down to '720x576' resolution and then re-entered into the decoding block.

Accordingly, the decoding block of the codec 15 reproduces and outputs a decoded data stream of '30' fps and '720x576' resolution in real time. For example, in the CPI 16, the hard disk system ( 14), the data streams of the converted '30' fps and '720x576' resolutions are classified and recorded on the hard disk 13 as separate files (for example, AAAA-1.avi). (S16).

In the CPI 16, when a playback operation is terminated by a user's request or the like (S17), when the playback of the converted file is requested again (S18), a separate file is stored in the hard disk 13. (E.g., AAAA-1.avi) instead of reading and playing the recorded file (S19), and then performing any corresponding operation requested by the user (S20), so that the codec 15 performs real time processing. Even for a video file having a frame rate per second and a resolution that is impossible, normal playback operation is possible.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. , Alteration, substitution, addition, or the like.

The video file playback control method according to the present invention as described above, for example, in a digital device such as a disc recorder, when playing a variety of video files such as Divix file, file information of the video file to be reproduced and the device The performance information of the installed codec is searched and compared, and the resolution (Resolution) or the number of frames per second (FPS) of the video file to be played is down to the data stream of the resolution or frame per second that the codec can accommodate. By performing a normal real time playback operation, it is a very useful invention that the video can be effectively prevented from being disconnected irregularly or the playback operation is forcibly stopped automatically while playing a video file.

Claims (6)

Searching for the resolution recorded in the header area of the video file to be played and the number of frames per second, and searching and comparing the resolution and the number of frames per second among performance information of the codec installed in the device; According to the comparison result, the decoding block of the codec installed in the device is controlled to reduce the number of frames per second, the encoding block of the codec is controlled, the resolution is lowered, and the input is replayed into the decoding block of the codec. 2 steps; And And recording the data down to the frame rate and the resolution per second as a separate file in the device, and then replaying the separate file recorded in the device when the video file is requested to be played again. Video file playback control method. delete The method of claim 1, The performance information of the codec is stored and managed as chip maker information in a nonvolatile memory in the device. The method of claim 1, In the second step, the video file is reproduced by controlling the decoding block of the codec installed in the device to reduce the number of frames per second or the encoding block of the codec to reduce the resolution. Control method. 5. The method of claim 4, And recording the data of which the frames per second and the resolution are down to a hard disk in the device. 6. The method of claim 5, And reproducing and reproducing the video file recorded on the hard disk when the video that is reproduced and outputted by reproducing the frame rate and the resolution per second is reproduced. Way.

Images