KR20060091573A - How to Record Data on DV System - Google Patents

Abstract

The present invention is to record the digital data in the DV system, for this purpose, the present invention, unlike the conventional method that can not reproduce the pre-recorded digital data when the power failure occurs in the recording mode of the DV system, digital data When performing the recording mode of digital data in the DV system that records and reproduces the recording data, the recording information is stored, and when the power failure occurs during recording of the digital data, the recording of the digital data is stopped, the power failure start information is stored, Mode, saves power failure end information at the end of power failure during the power failure mode, saves the recorded digital data as a completed file and saves the file information, and then executes the recording mode again. In the event of a power failure during recording of the system, By storing preserved in the generated file it can be played after it is capable to enhance the user's convenience using sex.

Description

Data recording method of DVR system {METHOD FOR RECORDING DATA OF DVR SYSTEM}

1 is a block diagram of a DVR system suitable for storing digital data when a power failure occurs during recording according to the present invention;

2 is a flowchart illustrating a process of storing digital data when a power failure occurs during recording in a DV system according to the present invention.

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

102: camera 104: motion detection block

106: control block 108: decoding block

110: video codec block 112: storage block

114: Encoding Block 116: UPS

118: memory

The present invention relates to a method of recording digital data in a television system, and more particularly, to a data recording method of a television system suitable for recording digital data in the event of a power failure during a recording mode in a television system. .

As is well known, the Digital Video Recorder (DVR) system uses a magnetic tape to record a video cassette recorder (VCR), which reduces the picture quality. It was developed to solve this problem because it is troublesome to replace it.It uses hard disk drive (HDD) or DVD (Digital Video Disc) instead of video tape, so it is not only easy to play or search the saved screen but also stored as digital signal. It is also convenient for editing and transferring images.

In addition, MPEG-4, the video compression standard, can be used to compress and save video screens as much as one hundredth, search them by time, date, camera, and event. It can also search, backup, and control cameras. Recently, high-definition video recorders (HDV Recorders) as well as devices that can recognize faces have been developed.

In addition, face recognition devices can compare the real-time video monitored with the face of a specific person in a database and are used for security at police stations and airports, and products that connect to the Internet without wires using wireless communication have emerged. It is expected to get the spotlight.

In the DB system, the digital video signal (digital data) is classified according to a preset file capacity, a predetermined time, user setting, and the like, and each file is recorded and stored together with the file information. Power failure compensation is supported for preservation of the stored data, which records the outage start time when a power outage occurs, and performs the power failure mode of the system. It also performs time compensation of the system, records the end time of the outage at the end of the outage, and returns to the final system mode (i.e., redoing the system mode before the outage).

However, in the conventional DVR system, when the power failure occurs during recording, data that has not been normally terminated (ie, incomplete) due to a forced power supply interruption among digital data recorded as incomplete data exist as incomplete data having only a recording start time. Thus, there is a problem that data cannot be reproduced later.

Accordingly, the present invention is to solve the above-described problems of the prior art, and at the same time to store the data recorded in the event of a power failure during recording of the DVR system as a file according to the recording information, power failure start information and power failure end information at the same time The purpose is to provide a data recording method of the DV system that can store the data.

In order to achieve the above object, the present invention provides a data recording method of a DV system that records and reproduces digital data, comprising: storing recording information when the recording mode of the digital data is performed; Checking whether a power failure occurs during recording, stopping recording of the digital data when the power failure occurs, storing power failure start information, performing a power failure mode, and whether the power failure is terminated while performing the power failure mode Storing the power failure termination information at the end of the power failure, storing the digital data whose recording has been stopped as a completed file, and storing the file information; and searching for a system mode before the power failure. Recording data of the DVR system including performing the recording mode again. There is provided a method.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A key technical aspect of the present invention is that, unlike the conventional method, in which the pre-recorded digital data cannot be reproduced when a power failure occurs in the recording mode of the DV system, the digital data in the DV system which records and reproduces the digital data is reproduced. When the recording mode of the recording mode, the recording information is stored, and during the recording of digital data, if the power failure occurs, the recording of digital data is stopped, the power failure start information is stored, the power failure mode is performed, and the power failure mode is performed. The purpose of the present invention is to store the power failure termination information at the end of power failure, and to re-record the recording mode after storing the digital data stopped recording as a completed file and at the same time storing the file information. Easy to achieve.

1 is a block diagram of a DV system suitable for storing digital data in the event of a power failure during recording in accordance with the present invention, and includes a camera 102, a motion detection block 104, a control block 106, and a decoding block 108. ), Video codec block 110, storage block 112, encoding block 114, uninterruptible power supply (UPS) 116, and memory 118.

Referring to FIG. 1, cameras 102 are respectively installed at specific locations to capture an image of a specific area, and each image signal picked up here is transferred to the decoding block 108. In this case, the present invention has been described as only one camera as an example, but it is a matter of course that a plurality of cameras, such as three, five, seven, nine, not one, may be applied depending on the need or use.

Subsequently, the motion detection block 104 includes a motion detection sensor and the like, and detects motion for each image transmitted from the camera 102, for example, compares the previous image with the current image while storing the previous image on the time axis. The motion is detected by a method of comparing the before and after images, and the motion detection signal in each of these images is transmitted to the control block 106. Here, the present invention has been described as only one motion detection block 104 as an example, but a plurality of motion detection such as three, five, seven, nine, not one in conjunction with the number of cameras to be installed Of course, you can apply blocks.

In addition, the control block 106 performs overall control of the DV system, and provides a control signal to the decoding block 108 to decode video signals captured by a plurality of cameras installed at a specific location.

In addition, the control block 106 compresses the decoded video signal at the time of recording by MPEG or the like, and stores a control signal for recording and storing the video at the storage block 112 (eg, a hard disk drive (HDD)). And the storage block 112, and during reproduction, a control signal for reading a video signal recorded and stored in the storage block 112 and transmitting the video signal to the video codec block 110 is provided to the storage block 112.

In addition, the control block 106 provides a control signal for decompressing the read video signal to the video codec block 110 by MPEG or the like, encodes the decompressed video signal, and displays the image through a monitor (not shown). A control signal for reproducing the signal is provided to the encoding block 114.

In addition, the control block 106 receives power from the UPS 116 when a power failure occurs due to a power failure during recording and storing a digital video signal (digital data), and includes power failure generation information such as a time of occurrence of power failure. The memory 118 stores the memory 118, controls the system to perform the power failure mode, checks whether the power failure ends, and when the power failure is resumed and power supply is resumed, the built-in memory 118 includes power failure termination information such as power failure end time. And the like, the system mode is searched for before the power failure occurs, and the system is controlled to perform the recording mode of the digital video signal accordingly.

Here, the recording and storing of the digital video signal is performed together with the recording information such as the recording start time, and the respective digital video signals are separately recorded and stored according to the conditions of the preset file capacity, the predetermined time, the user setting, and the like. Even if the digital video signal prerecorded at the end of the power failure does not meet a predetermined time and a condition according to a user setting, the control block 106 detects the power failure start information and the power failure end information stored in the memory 118 and stores the same. And the previously recorded digital video signal (digital data) from the recording start time to the occurrence of power failure as a completed file, together with file information (e.g., file name, recording time, etc.). Control to record and store in the storage block 112.

Next, the decoding block 108 decodes the image signals picked up from the plurality of cameras according to the control signals provided from the control block 106 and transmits them to the video codec block 110.

In addition, the video codec block 110 compresses an image signal transmitted from the decoding block 108 in a manner such as MPEG, and delivers the compressed image signal to a storage block 112, for example, a hard disk drive. The recorded and stored digital video signal transmitted from 112 is decompressed in a method such as MPEG and transmitted to the encoding block 114.

Meanwhile, the storage block 112 is a large-capacity hard disk drive for storing image signals captured by a plurality of cameras, and the like. The storage block 112 is provided through the video codec block 110 according to a control signal provided from the control block 106. The video signal compressed in the MPEG or the like is stored and transferred to the video codec block 110 to reproduce the stored video signal.

In addition, the storage block 112 stores one uncompleted digital video signal from a recording start time to a power failure occurrence time according to a control signal provided from the control block 106 when a power failure occurs during recording of the digital video signal (digital data). Records and saves the file along with the file information.

Subsequently, the encoding block 114 encodes the video signal transmitted from the video codec block 110 into an arbitrary camera channel to reproduce the video signal through a monitor (not shown).

Meanwhile, the UPS 116 is an uninterruptible power supply and performs a function of supplying power to the control block 106 in order to stably stop the system in the event of a power failure and maintaining the external display time of the system. In addition, the memory 118 is, for example, an SDRAM or the like, and stores power failure start information such as a power failure start time at the time of power failure and power failure end information such as a power failure end time at the end of a power failure, and the control block 106 Is provided.

Next, a description will be given of a process of storing a previously recorded digital data which is not completed in accordance with the power supply interruption when a power failure occurs during recording in the DV system having the above-described configuration.

2 is a flowchart illustrating a process of storing digital data when a power failure occurs during recording in a DV system according to the present invention.

Referring to FIG. 2, during the recording mode of recording and storing the digital video signal in the DV system (step 202), the control block 106 checks whether a power failure occurs (step 204). In this case, the digital image signal (digital data) is stored together with recording information such as file name, recording start time, recording end time, and the like according to the preset file capacity, predetermined time, and user setting mode. Each digital data is recorded and stored in the hard disk drive.

As a result of the check in step 204, when a power failure occurs, the control block 106 stops recording of digital data, and transmits the power failure occurrence information such as the time of occurrence of power failure to the built-in memory 118 or the like, and transmits this information. Save (step 206).

The control block 106 then controls the system to perform a power failure mode (step 208). Here, the power failure mode refers to a mode that performs a function such as stably stopping the operation of the system in the event of a power failure and maintaining an external display time, which may be performed using the UPS 116.

Next, the control block 106 continuously checks whether the power failure is terminated (starting time of resupply of power) (step 210).

As a result of the check in step 210, when the power failure ends, the control block 106 transmits the power failure end information such as the power failure end time to the built-in memory 118 or the like to store this information (step 212). Here, the power failure end information is stored as power failure information (eg, power failure start time, power failure end time, etc.) together with power failure generation information stored at the time of power failure.

The control block 106 detects the power failure information in the memory 118 and provides it to the storage block 112 to complete the pre-recorded digital video signal (digital data) from the recording start time to the occurrence of the power failure. The recorded file is recorded and stored along with file information (for example, file name, recording time, etc.) (step 214).

At the same time, the control block 106 searches for the system mode before the power failure occurs and accordingly performs the recording mode of the digital video signal again (steps 216 and 218).

Therefore, the digital video signal that is not recorded and saved as a file among the digital video signals recorded at the time of power failure while the recording mode is executed in the DVR system files the digital video signals from the recording start time to the power failure time as one complete file. Recording can be saved with the information.

On the other hand, the present invention described above is described as being stored with the file information as a complete file, it is also possible to play back the file with the file information thereafter.

As described above, the present invention, unlike the conventional method that can not play the pre-recorded digital data when the power failure occurs in the recording mode of the DV system, the DV system to record the digital data to the hard disk and to reproduce it If the power failure occurs while the digital data is being recorded, the power failure mode is saved along with the power failure mode, and the unrecorded digital data is saved as a completed file and the file information is saved. By re-executing, the pre-recorded digital data which is not completed in case of power failure during the recording of the DVR system can be stored and stored as a completed file, which can be reproduced later, thereby improving user convenience.

Claims (5)

A data recording method of a DVR system that records and reproduces digital data, Storing the recording information when the recording mode of the digital data is performed; Checking whether a power failure occurs during recording of the digital data; Stopping recording of the digital data, storing power failure start information, and performing a power failure mode when the power failure occurs; Checking whether the power failure is terminated while the power failure mode is performed; Storing the power failure termination information at the end of the power failure, storing the digital data whose recording has been stopped as a completed file and simultaneously storing the file information; Re-executing the recording mode Data recording method of the DV system including a. The method of claim 1, The recording information includes a recording data name and recording start time. The method of claim 1, The power failure start information includes a time when the power failure occurs. The method of claim 1, The power failure end information includes a time when the power failure is terminated. The method of claim 1, The file information includes a recording start time, a recording time having a recording end time, and a file name.

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