KR100606075B1 - File property change and management method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-bit stream recorder, and more particularly, to a method of changing and managing attributes of video files recorded for different purposes. To this end, in the present invention, when there is an arbitrary first recording mode execution input, data input from the selected channel is recorded on the recording medium as a first file, and when there is a switch input to the second recording mode during the first recording mode. After changing the first file to the second file, the attributes of the file can be changed by recording the data input from the selected channel as the second file data.

Time delay viewing, file properties, change.

Description

FILE PROPERTY CHANGE AND MANAGEMENT METHOD}             

1 is a view for explaining a method for managing a hard disk in the form of a circular buffer in a broadcast receiving system for time delay viewing.

2 is a diagram for explaining another method of managing a plurality of video streams so that they are arranged discontinuously in a hard disk recording area.

3 is a block diagram of a broadcast receiving system according to an embodiment of the present invention;

4 is a layout diagram (a) and control information detailed configuration diagram (b) of circular buffer blocks that are discontinuously present in a hard disk recording area according to an embodiment of the present invention;

5 is a flowchart illustrating a file attribute change and management process according to an exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-bit stream recorder, and more particularly to a method for changing and managing attributes of video files recorded for different purposes.

The hard disk drive, which is a secondary memory device of a computer system, can be randomly accessed, and has a high data transfer speed and a lower cost and a larger capacity than other auxiliary memory devices. It is used as a random access storage device of an in-broadcast reception system.

A broadcast receiving system having a random access storage device is a system capable of recording and reproducing broadcast signals, and at the same time, time delay viewing. The time-delay viewing of the broadcast signal and the recording and playback of the video stream may be implemented by buffering the video stream input / output to the hard disk drive.

Hereinafter, a method of arranging a video stream in a hard disk recording area of a recording medium in a broadcast receiving system capable of recording or playing simultaneously with time delay viewing will be described. First, FIG. 1 illustrates a hard disk in a broadcast receiving system for time delay viewing. Is a view for explaining a method for managing the data in a circular buffer form, and FIG. 2 is a diagram for describing a method for managing a plurality of video stream blocks so that they are arranged discontinuously in a hard disk recording area.

As shown in FIG. 1, when a part of the hard disk recording area is managed in the form of a single circular buffer, the video stream has fixed size blocks (defined as circular buffer blocks). Records are stored on. When the hard disk is managed as a circular buffer, the write point W and the read point are set and then moved clockwise (or counterclockwise) based on the write point W. Record and store the new video stream block. At this time, if a certain amount of time has elapsed due to the limitation of the circular buffer size, previously recorded data is erased by new data. In the read operation, the circular buffer is randomly accessible at an arbitrary time point so that a predetermined video stream is reproduced.

Meanwhile, as shown in FIG. 2, in the method of disposing and managing a video stream discontinuously, a hard disk area is composed of blocks of fixed size (defined as recording channel blocks). It is stored in logical video file units consisting of three blocks. In this case, the blocks constituting each video file are not necessarily physically contiguous. The reason is that video files of different sizes are deleted, resulting in non-contiguous free blocks (defined as blocks in which the video stream is not recorded). On the other hand, various information (title, time information, etc.) related to each video file and the position information of blocks belonging to each file are recorded and stored in a separate control information area.

As described above, in the broadcast receiving system having the random access storage device, a method of managing the time delay viewing video stream and the (reserved) recording video stream input through separate channels are managed as separate files.

However, if the user wants to record the video stream of the channel being watched with time delay to the normal recording mode, the time delay watching video recorded in the circular buffer blocks before the time of mode change (from time delay watching mode to recording mode) Since the file and the video file after the mode change cannot be managed as the video file for one recording channel, it is necessary to manage the files before and after the mode change as one file in order to meet the needs of the user. That is, since a general multi-bit stream recorder cannot change and manage the properties of already recorded video files, there is a need for a method of changing and managing the properties of video files recorded for different purposes.

Accordingly, an object of the present invention is to provide a method for changing and managing the properties of video files recorded for different purposes in a device capable of recording multiple bit streams on a recording medium.

Still another object of the present invention is to provide a file attribute change and management method that can change and manage a video file recorded for time delay viewing into a video file for recording.

In order to achieve the above object, the present invention provides a method for changing and managing file attributes in a multi-bit stream recording apparatus that can include a recording medium and can perform a plurality of recording modes individually or simultaneously.

Performing a first recording mode of recording data input from a selected channel to the recording medium as a first file when there is an arbitrary first recording mode performing input;

A file attribute changing process of changing the first file into a second file if a switch input to a second recording mode is performed while the first recording mode is performed;

And performing a second recording mode for recording data input from the selected channel as the second file data.

Hereinafter, an operation according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of a broadcast receiving system according to an embodiment of the present invention. Referring to FIG. 3, the broadcast signal receiving unit 10 includes an RF tuner 12 for receiving a digital broadcast signal input from the outside and a plurality of RF tuners 14 and 16 for receiving an analog broadcast signal input from the outside. And a plurality of video compressors 18, 20 and 22 for converting and compressing analog signals input through the plurality of RF tuners 14 and 16 into digital signals.

The random access storage device 30 records and stores the digital video stream input from the broadcast signal receiver 10 under the control of the controller 40 in a hard disk recording area of a recording medium, and reads out the stored video stream to restore the video. Output to the unit 50. The random access storage device 30 described above refers to hard disks for permanently storing a digital video stream, and an extension (IEEE 1394 interface) for extending a controller and a hard disk drive (HDD) for controlling driving of the drive. It consists of a HDD (Hard Disk Drive) (34) and dual port RAM (32). The dual port RAM 32 includes at least a video stream buffer area for temporarily storing a digital video stream and an area for temporarily storing control information upon system initialization.

The video recovery unit 50 restores the video stream output from the random access storage device 30 to the original signal through the system bus and outputs the original signal to the television receiver 90.

The controller 40 is a ROM for storing control program data for controlling the random access storage device 30 and the broadcast signal receiving unit 10, and a RAM for temporarily storing data generated during a control operation. It is equipped with a memory configured to control the overall operation of the broadcast receiving system according to an embodiment of the present invention. As an example, as shown in FIG. 5, a file management is performed by changing a video stream recorded for time delay viewing into a general video stream.

The remote controller 60 includes a plurality of control keys for system control, and generates and outputs data according to the operation of the control key to the controller 40. The plurality of control keys include a plurality of control keys for inputting pause, rewind, fast search command, time delay viewing, scheduled recording, recording, and the like.

The computer connection unit 70 interfaces signals transmitted and received between the broadcast receiving system and the computer according to an embodiment of the present invention, and the time checker 80 notifies time information so that the broadcast receiving system can perform automatic recording. .

4 is a layout diagram (a) and control information detailed configuration diagram (b) of circular buffer blocks existing discontinuously in the hard disk recording area according to an embodiment of the present invention. 4, a hard disk recording area according to an embodiment of the present invention is divided into a control information area A and a video (stream) storage area B in which video stream blocks are recorded, as shown in (a). do. The information recorded in the control information area A is composed of file attribute information, recording channel block management information, free block management information, and circular buffer block management information, as shown in FIG.

The file attribute information is information including the name, size, recording time and date of the video file to be recorded, and the recording channel block management information is stored on the disc recording area for the blocks constituting the video file for the (reserved) recording channel. The free block management information is the location information of blocks that can be freely allocated in the disc recording area. The circular buffer block management information is location information on the disc recording area for blocks constituting the video file for time delay viewing. Such control information is accessed during initial system operation, stored in the dual port RAM 32, updated according to the selection mode, and then recorded in the control information area.

Hereinafter, a file attribute change and management method according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 5.

First, if the operation mode of the current system is determined to be a time delayed viewing mode in step 100, the control unit 40 of the broadcast receiving system first searches for free block management information and allocates a free block, and then in step 110, the allocated free block. Record the video stream for time delay viewing. The controller 40 proceeds to step 120 and updates the circular buffer block management information for managing the recorded time delayed video stream. Then, the controller 40 proceeds to step 130 and checks whether or not the recording mode is switched. That is, the controller 40 checks whether a command for performing general recording is input from the user during recording of the time delay viewing video stream in step 130.

If there is no input of a command for switching to the recording mode as a result of the inspection, the controller 40 records the video stream inputted from the time-delay viewing channel in units of blocks in the hard disk recording area in steps 110 and 120 in a circular manner. Update the buffer block management information. However, if there is a command for switching to the recording mode, the controller 40 proceeds to step 140 and converts the circular buffer block management information updated so far into recording channel block management information. That is, the file name is converted from the video file for time delay viewing to the video file for the recording channel. In step 150, the control unit 40 having changed the file name records the recording video stream input after the mode switching time in the allocated free block and updates the recording channel block management information in step 160. Accordingly, the time-delay viewing video streams recorded before the mode change point are managed together with the recording video streams after the mode change point as a video file for the recording channel.

As described above, the control unit 40 performing the recording mode by changing the property of the file updates the recording channel block management information while recording the video stream for recording in the hard disk recording area until there is a recording end input. If there is an end input, the controller proceeds to step 180 and records the control information updated so far in the control information area A, and then ends the file attribute change and management method according to the embodiment of the present invention.

Although an embodiment of the present invention has described a method of changing a property of a file by taking a transition from a time delayed viewing mode to a recording mode as an example, the above-described method is also used when switching from the scheduled recording mode or the recording mode to the time delayed viewing mode. You can change the attributes of a file through the process.

Meanwhile, the terms used herein are terms defined in consideration of functions in the present invention, which may vary depending on the intention or customs of those skilled in the art, and the definitions should be made based on the contents of the present application. will be.

In addition, although specific embodiments of the present invention have been described and illustrated, it is obvious that the present invention can be variously modified by those skilled in the art. And since the present invention has been described in the present invention through a preferred embodiment of the present invention, when considering the technical difficulty aspects of the present invention, those skilled in the art can easily be modified to another embodiment and other embodiments of the present invention As can be added, it will be apparent that all embodiments and modifications cited in the above description belong to the appended claims.

As described above, the present invention can provide the convenience of using the system because the property of the video file recorded in any first mode can be changed and managed by the video file recorded in the second mode, and only temporarily recorded. It also has the advantage of permanently preserving data that can be preserved.

Claims (4)

A file attribute change and management method in a multi-bit stream recording apparatus having a recording medium and capable of individually or simultaneously performing a plurality of recording modes, Performing a first recording mode of recording data input from a selected channel to the recording medium as a first file when there is an arbitrary first recording mode performing input; A file attribute changing process of changing the first file into a second file if a switch input to a second recording mode is performed while the first recording mode is performed; And performing a second recording mode of recording data input from the selected channel as the second file data. The method of claim 1, wherein the first recording mode and the second recording mode are a time delayed viewing mode and a recording mode, respectively. The method of claim 1, wherein the first recording mode and the second recording mode are recording mode and time delay viewing mode, respectively. The method of claim 1, further comprising: updating file attribute information each time the file attribute is changed and recording the file attribute information on the recording medium.

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