KR100826175B1 - A private video recorder and a method for transforming its file - Google Patents

Abstract

The present invention relates to a personal video recorder for facilitating download and playback of data.

The present invention is a hard drive that stores data compressed video; A file converter for converting the compressed video data into a file format that can be played by a portable multimedia player; And it provides a personal video recorder (Private video recorder) comprising a central processing unit for controlling the operation of the hard drive and the file conversion unit.

Therefore, according to the present invention, a file can be downloaded and played back to a portable multimedia player through a USB host in a personal video recorder.

Personal Video Recorder (PVR), Portable Multimedia Player (PMP), MPEG 2

Description

A private video recorder and a method for transforming its file}

1 illustrates an embodiment of the use of a personal video recorder in accordance with the present invention.

2 is a block diagram of one embodiment of a personal video recorder according to the present invention in accordance with the present invention.

3 is a block diagram of an embodiment of a file conversion unit of a personal video recorder according to the present invention.

4 is a flowchart of one embodiment of a file conversion method of a personal video recorder according to the present invention;

<Explanation of symbols for the main parts of the drawings>

110: PVR equipped with USB Host 120: PMP

130: display 200: PVR hard drive

210: file converter 211: decoder

212 scaling unit and interpolation unit

213: user defined data 214: encoder

215: mux 220: central processing unit

230: USB host controller 240: system bus

250 memory

The present invention relates to a personal video recorder, and more particularly, to a data storage device and a file conversion method of a personal video recorder.

Recently, the spread of portable multimedia players (PMPs) has been expanded, and various contents have been relatively developed. In the case of PMP, content can be downloaded from a personal computer (PC) at a high speed by using a convenient method of plug and play of a universal serial bus (USB).

However, the current content is relatively in short supply in relation to copyright, and in order to solve this problem, direct access to the current airwave or cable broadcasting is required. The dissemination of recorded video due to copyright problem is considered illegal. However, it is common for an individual user to directly record and watch at a convenient time. Therefore, in the current legal system, it is not legally a problem for individuals to record and watch. In other words, there will be a significant merit of downloading a video recorded in a personal video recorder directly to a portable multimedia player without passing through other devices or media, and then watching it on the move or in the absence of a TV.

However, there are the following problems in directly downloading the video recorded in the above-described personal video recorder to the portable multimedia player.

First, the file format of the video recorded in the personal video recorder and the file format of the portable multimedia player do not coincide with each other, and thus cannot be downloaded directly.

Second, converting the file format recorded by the personal video recorder using a separate file format converter and downloading it back to the portable multimedia player is inefficient in terms of cost and time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a personal video recorder having a device capable of converting a file format such as an image directly into a file format suitable for a portable multimedia player.

Another object of the present invention is to provide a method for directly converting a file format such as an image into a file format suitable for a portable multimedia player in a personal video recorder.

In order to achieve the above object, the present invention provides a hard drive that stores data compressed video; A file converter for converting the compressed video data into a file format that can be played by a portable multimedia player; And it provides a personal video recorder (Private video recorder) comprising a central processing unit for controlling the operation of the hard drive and the file conversion unit.

The personal video recorder preferably further comprises a USB (Universal Serial Bus) Host Controller for transferring the converted playable file format to the portable multimedia player.

The personal video recorder may further include a system bus for transmitting the data compressed in the moving picture stored in the hard drive to the file converter.

The personal video recorder may further include a memory for temporarily storing data compressed by a moving picture transmitted from the system bus.

The file converter may include: a decoder configured to decode data compressed by a moving picture stored in the memory; A scaling unit that adjusts horizontal and vertical resolutions of the decoded data according to user-defined data; An interpolation unit configured to adjust a reproduction frequency of the decoded data according to the user-defined data; An encoder for encoding the data adjusted by the scaling unit and the interoperation unit into a format that can be reproduced by the portable multimedia player; And a mux for converting the encoded data according to a file format supported by the portable multimedia player.

The present invention includes the steps of decoding data compressed in a moving picture temporarily stored in a memory; Adjusting horizontal and vertical resolutions of the decoded data according to user-defined data; Adjusting a reproduction frequency of the decoded data according to the user-defined data; Encoding the data in which the horizontal, vertical resolution, and refresh rate are adjusted in a format that can be reproduced by a portable multimedia player; And converting the encoded data according to a file format supported by the portable multimedia player.

Preferably, the video compressed data is transmitted from the hard drive to the memory through a system bus.

The file conversion steps of the personal video recorder are preferably controlled by a central processing unit.

The file conversion method of the personal video recorder may further include downloading the data converted according to the file format supported by the portable multimedia player to the portable multimedia player through a USB host controller.

Preferably, the video compressed data is an MPEG 2 transport stream.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described. The same components as in the prior art are given the same names and the same reference numerals for convenience of description, and detailed description thereof will be omitted.

1 illustrates one embodiment of the use of a personal video recorder in accordance with the present invention. Referring to FIG. 1, the basic concept of a personal video recorder according to the present invention will be described.

The personal video recorder 110 is provided with a USB host function, and the personal video recorder 100 can transmit a file to the portable multimedia player 120. Therefore, even in an environment in which there is no display 130 such as a monitor, information such as a moving picture stored in the personal video recorder 110 may be freely viewed.

However, the file format stored in the personal video recorder 110 is different from the file format reproducible in the personal video recorder 110 and thus cannot be reproduced. Therefore, the internal device of the personal video recorder 110 and its operation method to convert the file format stored in the personal video recorder 110 into a video stream suitable for the playback environment of the portable multimedia player 120. This is necessary.

2 is a block diagram of a personal video recorder according to the present invention, and FIG. 3 is a block diagram of a file conversion unit according to the present invention. A personal video recorder according to the present invention will be described with reference to FIGS. 2 and 3 as follows.

The personal video recorder according to the present invention includes a PVR hard drive 200, a file converter 210, a central processing unit 220, a USB host controller 230, a system bus 240, and a memory 250. .

The PVR hard drive 200 stores video, audio, and the like in which a user performs a recording, recording, or the like using a personal video recorder in an MPEG2 transport stream format. The MPEG2 transport stream is converted into a file format that can be played in the portable multimedia player by the file converter 210, and then downloaded to the portable multimedia player through the USB host controller 230 so that the user can use the image and anytime, anywhere. Audio and the like can be viewed and listened to. The operations of the PVR hard drive 200 and the file converter 210 are controlled by the central processing unit 220.

 USB is a new general-purpose interface that can solve all of the faster transmission speeds, device collisions, and limited connections than conventional serial / parallel interfaces. It is capable of up to 480Mbps without changing the interface itself. Thus, by using the USB host controller 230, more data can be downloaded from the personal video recorder 110 to the portable multimedia player 120 in a shorter time.

The MPEG2 transport stream stored in the PVR hard drive 200 is transmitted to the memory 250 through the system bus 240, temporarily stored in the memory 250, and then the file conversion unit 210. ) Is converted into a file format that can be played in the portable multimedia player and stored in the PVR hard drive 200 through the system bus 240 or downloaded at a high speed through the USB host controller 230.

The configuration of the file converter 210 is as follows. The file converter 210 may include a decoder 211, a scaling unit, an interpolation unit 212, user defined data 213, an encoder 214, and a mux. (Mux, 215).

The decoder 211 is a computer circuit that decodes the digitally coded data into a corresponding analog signal in a computer or the like. In the present invention, the decoder 211 temporarily stores data of an MPEG2 transport stream stored in the memory 250. Decrypt The scaling unit and the interoperation unit 212 may adjust a scaling process of adjusting the number and vertical resolution of the decoded data to the user-defined data 213 and adjust the reproduction frequency of the decoded data to the user-defined data 213. ), An interpolation process is performed. Subsequently, in the encoder 214, the data adjusted by the scaling unit and the interposer 212 are encoded in a format that can be reproduced by a portable multimedia player, and the encoded data is transmitted to the mux 215. Is sent. The mux 215 refers to a data selection logic circuit, that is, a multiplexer, which selects any one input signal from a signal input from a plurality of circuits and outputs the same to the output circuit, and the encoded data of the mux 215. Is converted according to a file format supported by the portable multimedia player and transmitted back to the memory 250.

4 is a flowchart of a file conversion method of a personal video recorder according to the present invention. Referring to Figure 4 describes a file conversion method of a personal video recorder according to the present invention.

First, after decoding the data of the MPEG2 transport stream temporarily stored in the memory (S410), the horizontal and vertical resolutions of the decoded data are adjusted to the user-defined data (S420), and then the refresh rate of the decoded data is adjusted. Adjusting according to the user-defined data (S430), and encoding the data whose horizontal, vertical resolution and refresh rate are adjusted in a format that can be played by a portable multimedia player (S440); The encoded data is converted according to a file format supported by the portable multimedia player (S450).

The MPEG2 transport stream is transferred from the hard drive of the PVR to the memory via a system bus and temporarily stored, and then the file conversion process is performed. The file conversion steps of the personal video recorder described above are controlled by a central processing unit (CPU) and download the converted data according to the file format supported by the portable multimedia player to the portable multimedia player through a USB host controller. After that, the user can play the file.

The MPEG2 transport stream is data obtained by compressing and storing video, audio, and the like, in which a user performs a recording, recording, or the like using a personal video recorder, in a predetermined format. Data stored according to a video compression method may also be stored in a personal video recorder according to the present invention and converted into a file of another format.

The operation of the personal video recorder and the file conversion method according to the present invention described above are as follows.

By adding data conversion and transmission functions in other formats to the data storage technology of the personal video recorder, other devices such as portable multimedia players can be played without distinguishing time and place.

The present invention is not limited to the above-described embodiments, and such modifications are included within the scope of the present invention even though modifications may be made by those skilled in the art to which the present invention pertains.

The effects of the personal video recorder and the file conversion method according to the present invention described above are as follows.

First, a file format such as a video of a personal video recorder can be directly converted into a file format suitable for a portable multimedia player.

Second, the converted format file can be downloaded and played directly to the portable multimedia player through the USB host controller.

Claims (11)

A hard drive storing data compressed with a video; A file that decodes the compressed video data, adjusts the horizontal, vertical resolution, and refresh rate of the decoded data according to user-defined data, encodes the file, and converts the file into a file format that can be played by a portable multimedia player. A conversion unit; And Private video recorder (Private video recorder) comprising a central processing unit for controlling the operation of the hard drive and the file converter. The method of claim 1, And a USB (Universal Serial Bus) Host Controller for transferring the converted playable file format to the portable multimedia player. The method of claim 1, Personal video recorder further comprising a system bus for transmitting the data compressed in the video stored on the hard drive to the file conversion unit. The method of claim 3, And a memory for temporarily storing compressed data of the moving image transmitted from the system bus. The method of claim 4, wherein the file conversion unit, A decoder which decodes the compressed data of the moving picture stored in the memory; A scaling unit that adjusts horizontal and vertical resolutions of the decoded data according to user-defined data; An interpolation unit configured to adjust a reproduction frequency of the decoded data according to the user-defined data; An encoder for encoding the data adjusted by the scaling unit and the interoperation unit into a format that can be reproduced by the portable multimedia player; And And a mux for converting the encoded data according to a file format supported by the portable multimedia player. The method according to any one of claims 1 and 3 to 5, And the data compressed with the moving picture is an MPEG 2 transport stream. Decoding the compressed data of the moving picture temporarily stored in the memory; Adjusting horizontal and vertical resolutions of the decoded data according to user-defined data; Adjusting a reproduction frequency of the decoded data according to the user-defined data; Encoding the data in which the horizontal, vertical resolution, and refresh rate are adjusted in a format that can be reproduced by a portable multimedia player; And And converting the encoded data according to a file format supported by the portable multimedia player. The data of claim 7, wherein the compressed video is File transfer method of a personal video recorder, characterized in that the transfer from the hard drive to the memory via a system bus. delete The method of claim 7, wherein And downloading data converted according to a file format supported by the portable multimedia player to the portable multimedia player through a USB host controller. The method according to claim 7 or 8, And the data compressed with the moving picture is an MPEG 2 transport stream.

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