KR101608992B1 - Method for calculating file size of export file and DVR device employing the same - Google Patents

Abstract

The present invention relates to a method for measuring a file size of an export file and a DVR apparatus using the same. According to the present invention, the user can accurately and quickly grasp the file size of the export file before performing the export, thereby preparing a memory suitable for the file size.

DVR, export, file size, index data

Description

METHOD FOR MEASURING FILE SIZE OF EXECUTING FILE AND DVR DEVICE USING THE SAME

The present invention relates to a method for measuring a file size of an export file and a DVR apparatus using the same.

Generally, a DVR (Digital Video Recorder), which is an abbreviation of a digital video recorder, captures an image signal input through a surveillance camera, converts the captured image signal into a high-quality digital image signal, and stores the digital image signal on a storage medium such as a hard disk or an optical disk.

Using the DVR device, the user can easily search or play back the recorded video by time, date, camera, event, and can easily backup and edit. In addition, when a plurality of surveillance cameras are used, it is possible to perform a multiplexer function capable of dividing and monitoring an image input from each surveillance camera on one monitor screen.

The DVR device is a digital image storage device which can use the recorded images semi-permanently. Currently, it is installed in a large discount store, a parking lot, a financial institution, an airport, etc., and is widely used for checking the security status.

In recent years, a lot of vehicles have been installed in buses, subways, patrol cars and other vehicles in order to secure evidence for accidents such as traffic accidents and human accidents. In addition, crime is frequently occurred along with the speed of social development, so that the DVR installation requirement is increasing as a security device in order to prepare it at home.

Since the storage format of the video data stored in the DVR device is specified, it is impossible to reproduce the video data in an external device such as a computer without specific conversion. Accordingly, in order to display the image data on the external device, the date, time, camera information, and the like are specified and designated, the image data matching the condition is searched, and then the searched image data is, for example, an audio video interleave AVI) file format, and the like. The conversion of the video data into the multimedia video file is called export.

An object of the present invention is to provide a file size measuring method for quickly and accurately measuring a file size of image data to be exported before performing export in a DVR apparatus and a DVR apparatus using the same.

According to an embodiment of the present invention, there is provided a method of providing a file size of an export file performed in a DVR apparatus, the method comprising: storing image data; Generating index data in which file size information of frames constituting the image data is recorded; Reading the index data for a frame included in an interval to be exported from the image data; And calculating a file size of image data to be exported based on the file size information recorded in the read index data.

A DVR apparatus according to an embodiment of the present invention includes a storage unit for storing image data and index data recording file size information of frames constituting the image data; A control unit for reading out the index data for a frame included in an interval in which the export of the image data is to be performed; And an operation unit for calculating a file size of image data to be exported based on the file size information recorded in the read index data.

The method of measuring an export file size according to an embodiment of the present invention may be recorded in a recording medium as a program to be executed by a computer.

According to the present invention, the user can accurately and quickly grasp the file size of the export file before performing the export, thereby preparing a memory suitable for the file size.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

1 is a block diagram of a DVR apparatus to which a method of measuring a file size of an export file according to an embodiment of the present invention is applied.

1, a DVR device 1 according to an embodiment of the present invention includes an interface unit 10, an A / D conversion unit 11, a digital signal processing unit 12, an encoder 13, a decoder 13, A storage unit 15, a control unit 16, an operation unit 17, and a user input unit 18, as shown in FIG.

An analog video signal output from one or more monitoring cameras (CAM) 1 connected through the interface unit 10 can be converted into a digital video signal by the A / D converter 11.

Then, the digital video signal is processed into digital video data by the digital signal processing unit 12, encoded into compressed video data by the encoder 13, and stored in the storage unit 15 as an image data file Lt; / RTI >

According to an embodiment, the encoder 13 may encode the video signal with a predetermined motion picture compression algorithm such as an MPEG algorithm.

When the image data file stored in the storage unit 15 is read and reproduced, the decoder 14 decodes the image data into original digital video data. Then, the decoded digital video data may be output as a video image through the digital signal processor 12 and displayed on a display such as a monitor.

The DVR device 1 may export some or all of the image data stored in the storage unit 15 and provide the exported image to a user. That is, the user may extract video data of a certain period of the stored video data, for example, a specific time period, convert the video data into a multimedia video file, and store the video data in a portable storage device (CD, BD, portable hard disk, USB memory or the like). To this end, the user can acquire a video of a desired section by executing an export function supported by the DVR device 1. [

In addition, the DVR device 1 may calculate a file size of a converted multimedia video, i.e., an export file, before the export, and provide the file size to a user. As a result, the user can prepare a memory with a storage capacity suitable for the file size of the image data to be exported in advance.

Hereinafter, a process of previously calculating the file size of the image data to be exported by the DVR device 1 before performing the export will be described.

According to an embodiment of the present invention, the DVR device 1 includes a storage unit 15 for storing image data and index data recording file size information of frames constituting the image data, A controller (16) for reading the index data for an image frame included in an interval to be performed, and an operation unit (16) for calculating a file size of the multimedia video data exported based on the file size information recorded in the read index data 17).

As described above, the storage unit 15 may store image data that has been collected from the image capturing apparatus such as a camera and subjected to digital signal processing. According to an embodiment, the image data may be encoded into a specific format compressed file using a predetermined algorithm, such as MPEG algorithm, after digital signal processing.

Also, the storage unit 15 may store index data of image frames constituting the stored image data. According to an embodiment of the present invention, the file size information of the frames may be recorded in the index data.

For example, when the storage unit 15 stores one hour of image data input from the first camera and the image data is composed of 100,000 frames, the storage unit 15 stores the image data of each frame Index data in which 100,000 pieces of file size information are recorded, such as file size information, i.e., a size of a first frame of 200 KB, a size of a second frame of 200 KB, a size of a 490 frame of 390 KB, and a size of a 491 frame of 450 KB . The size of the image frame is reduced when the motion of the input image is changed according to the input image content.

According to an embodiment, the index data may include a number of image frames and a size of an image frame constituting the image data, and may store the data in a table.

2 is a table showing the data structure of index data according to an embodiment of the present invention.

As shown in FIG. 2, the index data may include a table of the frame numbers and image frame sizes of the image frames constituting the image data.

According to an embodiment of the present invention, the index data is generated separately from the image data and stored. If the file name of the related image data is abc.data, the index data is configured to have the same name but different extensions as abc.index, and may further include related information on the image data. The index data may further include information on a recording time of an image frame.

Since the index data stores only the size data of the image frame in comparison with the image data, the index data can be quickly read and analyzed by the controller 16 because the file size is small and the configuration is simple.

The control unit 16 reads index data of a frame included in an interval in which the export of the image data is to be performed.

According to an embodiment of the present invention, when part of image data stored in the storage unit 15 is to be exported, the user may input an interval through which the image data is to be exported through the user input unit 18.

In this case, the control unit 16 can recognize the frame included in the section to perform the export and read the index data in which the file size information for the corresponding frame is recorded.

For example, if the user wishes to export only the image data of the 10-minute interval from the image data of one hour, the controller 16 stores the image data corresponding to the 10-minute interval to be exported from the stored image data And reads the data corresponding to the read image frame information by examining the index data related to the image data. That is, the read index data includes file size information of an image frame constituting the 10-minute image data.

When the index data includes time information and size information of an image frame at the same time, the control unit can read the index data and simultaneously obtain the size information of the image frame corresponding to a specific time period.

The operation unit 17 may calculate the file size of the image data to be exported based on the file size information of the frame recorded in the index data read by the controller 16. [

According to an embodiment of the present invention, the operation unit 17 may calculate the file size of the image data to be exported by summing the recorded file size information.

For example, if the read index data includes file size information for each of 10,000 frames, the operation unit 17 may calculate the file size of the image data to be exported by summing the 10,000 frame file sizes have.

The file size of the calculated image data may be provided to the user through an output device such as a display. As a result, the user can grasp the accurate file size of the image data to be exported, thereby preparing a memory having a capacity suitable for the image data.

The process of calculating the file size of the image data described above is performed before execution of the export and is provided to the user. Conventionally, the file size of the multimedia moving image data generated after the export is completed is measured and provided to the user. However, the present invention can grasp the file size of the multimedia moving image data in advance.

Further, the information on the file size of each frame is recorded in the index data having a small data size and simple configuration without storing the information on the file size of the large data size, and the index data can be read, analyzed and computed quickly .

3 is a conceptual diagram illustrating a method of calculating an export file size according to an embodiment of the present invention.

3, the storage unit 15 stores the index data (CAM1.index, CAM2.index) separately in addition to the image data (CAM1.data, CAM2.data) do. In the index data, file size information of frames constituting the stored video data is recorded.

When the user inputs a time or an interval to perform the export, the controller 16 reads the index data (CAM1.index in FIG. 3) of the frame included in the section in which the export is performed among the image data.

Then, the file size of the image data to be exported may be calculated based on the file size information recorded in the read index data.

3, the frame included in the section to be exported is from the 3rd frame to 10,000 frames, and the controller 16 extracts the frame of the section to be exported from the index data (CAM1.index) stored in the storage unit 15 The file size of the number of frames from the number of frames to 10,000 frames can be read.

Then, the operation unit 17 can calculate the file size of the image data to be exported by summing the file sizes of the third frame to 10,000 frames.

FIGS. 4 to 7 are diagrams for explaining a process of providing a file size of an export file performed by the DVR apparatus according to an embodiment of the present invention.

4 shows a screen displayed on a display device, e.g., a monitor, connected to the DVR device 1 according to an embodiment of the present invention.

As shown in FIG. 4, the DVR device 1 can receive video signals from a plurality of cameras. The received video signal is converted into a digital signal, encoded into compressed video data through a predetermined compression algorithm, and stored in the storage unit 15.

According to the embodiment, the image signals obtained from the respective cameras, e.g., CAM 1 to CAM 4, may be composed of different image data for each camera and stored in the storage unit 15.

For example, the first video signal obtained from CAM 1 is composed of CAM1.data and stored in the storage unit 15, and the second video signal obtained from CAM2 is composed of CAM2.data, 15, and as a result, the storage unit 15 may store a total of four image data files, i.e., CAM1.data, CAM2.data, CAM3.data, and CAM4.data.

According to the embodiment, the DVR apparatus 1 reconstructs an image obtained from a plurality of cameras as one image as shown in FIG. 4, and stores the reconstructed image as one image data in the storage unit 15 .

For example, as shown in FIG. 4, after reconstructing the first to fourth images, which are four images, into one image, the reconstructed image is generated as one image data file, e.g., CAM.data, 15).

Then, when the user executes the export function supported by the DVR device 1, the DVR device 1 can output a message window for setting details about the export via the display device.

5, the control unit 16 of the DVR device 1 displays a message window 21 in the form of a GUI for setting details about the export via the DSP 12 on the display device (for example, The user designates a storage location or a storage medium 211 in which an export file is stored through the message window 21 and displays the image to be exported among the images obtained from the plurality of cameras 212 ), and can designate a section (213) in which image data is to be exported.

In other words, the message window 21 provides a user interface for setting a storage location where the export file is to be stored, a video to be exported, and a section in which the export is to be performed.

In addition, a size estimating menu 214 is provided to predict the file size of the multimedia moving picture to be generated when performing the export.

As described above, the DVR device 1 according to the embodiment of the present invention further includes a user input unit 18, and the storage location where the export file is to be stored, the image to be exported, and the export are performed Inputs a section.

After setting details about the export, when the user executes the capacity measurement menu 214, the DVR device 1 calculates the file size of the image data to be exported using the file size measurement method of the above-described export file .

6, the controller 16 of the DVR device 1 may output the calculated file size as a GUI-type pop-up window 22 and provide it to the user.

Therefore, the user can confirm the file size of the export file before executing the export function of the DVR device, and prepare a storage medium suitable for the file size and store the export file.

In addition, according to the present invention, since information on the file size of a video frame is managed by generating a separate index file without recording information on the file size of the frame in the video data on which the video signal is recorded, Can be measured.

In other words, since the file size of a frame is extracted by analyzing an index file having a small capacity and a simple configuration, without analyzing image data having a large capacity and extracting the file size information of the frame, Can be minimized.

After confirming the file size of the export file calculated through the above process, the user can execute the export menu 215. As a result, as shown in FIG. 7, the DVR device 1 stores the export file in the section Run the export on.

According to the embodiment, the DVR device 1 may output the time required for the export and provide it to the user. For example, as shown in FIG. 7, the DVR device 1 may output the remaining time until completion of the export to the pop-up window 23 and provide it to the user.

According to the embodiment, the DVR device 1 can structurally show the progress of the export and provide it to the user. For example, as shown in FIG. 7, the DVR device 1 may output the progress of the export in the progress bar format in the pop-up window 23 and provide it to the user.

8 is a flowchart illustrating a method of measuring a file size of an export file according to an embodiment of the present invention.

8, a method for measuring the file size of an export file according to an exemplary embodiment of the present invention includes storing image data (S31), index data indicating file size information of image frames constituting the image data (Step S32), receiving the time or section to be exported (S33), reading the index data for the image frame included in the section to be exported (S34), and creating and storing the exported image data file And calculating the size (S35). The method may further include outputting the calculated file size to a display device.

The step S31 stores the image data. The image data may be collected from an image capturing device such as a camera and stored via digital signal processing. According to an embodiment, the digital signal processed video signal may be stored as a compressed file of a specific format through a predetermined algorithm.

The step (S32) generates index data recording file size information of frames constituting the image data. The index data is generated separately from the image data and stored. The index data records the file size information of the frames constituting the image data and is used for calculating the file size of image data to be described later.

The index data may simultaneously record time information together with file size information of image frames.

The step S33 receives the time or section to be exported among the stored image data. The user can specify an interval to be exported by inputting a user's desired time interval, for example, 10 minutes or 1 hour, of the stored image data. According to one embodiment, the user can specify the section to be exported by inputting the export start time and the end time, respectively. According to the embodiment, the export start time and the time interval may be input to specify the export interval.

The step (S34) reads the index data of the image frame included in the section of the image data to be exported. That is, if the section to be exported is specified, the image frame included in the section can be identified, and the data in which the file size information of the image frame is recorded can be read out from the index data.

When the index data includes time information of image frames, it is possible to simultaneously read size information corresponding to an image frame of a specific section by reading index data.

The step S35 calculates the file size of the image data to be exported based on the file size information of the frame recorded in the read index data. In the index data, file sizes of frames included in the export section are recorded.

According to an embodiment of the present invention, the total file size of the image data to be exported can be calculated by summing the file sizes of the recorded frames.

The export file size measurement process described above is executed in advance before performing the export and is provided to the user in advance. As a result, the user can quickly check the exact file size of the image data to be exported.

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. It can be implemented. The scope of the present invention is defined by the appended claims, and all differences within the scope of the claims are to be construed as being included in the present invention.

1 is a block diagram of a DVR apparatus to which a method of measuring a file size of an export file according to an embodiment of the present invention is applied.

2 is a table showing the data structure of index data according to an embodiment of the present invention.

3 is a conceptual diagram illustrating a method of calculating a file size of an export file according to an embodiment of the present invention.

FIGS. 4 to 7 illustrate a process of providing a file size of an export file of the DVR apparatus according to an embodiment of the present invention.

8 is a flowchart illustrating a method of measuring a file size of an export file according to an embodiment of the present invention.

Claims (18)

A method of calculating a file size of video data stored in a DVR device, Storing index data including a file size for each of frames of the image data and image data having the frames; Setting a part of the video data selected from the video data stored in the DVR device as a section to be exported to the storage unit; Reading the index data including the file size for each of the frames of the stored video data in the DVR device; Obtaining a file size for each of the frames included in the exported section from the read index data; And And calculating the size of the image data corresponding to the section to be exported based on the acquired file size. The method of claim 1, wherein the setting of the interval comprises: And receiving the section through an input menu displayed on the display unit. delete 2. The method of claim 1, wherein calculating the size of the image data comprises: And adding each file size for each of the frames included in the acquired section to be exported. 2. The method according to claim 1, Wherein the file size is distinguished from the image data. The method according to claim 1, Wherein the index data further includes time information of image data. The method according to claim 1, And displaying the file size of the calculated image data through a display unit. 3. The method of claim 2, Wherein the step of receiving the interval includes receiving a start time and an end time of the video data stored in the DVR device. The method according to claim 1, Wherein the setting of the interval further comprises selecting a storage medium or a storage location for storing the image data corresponding to a section to be exported from the DVR device. delete A method of calculating a file size of video data stored in a DVR device, Setting a portion of video data having a segment stored in the DVR device as a section for exporting a part of video data to a storage unit; Reading the file size information for each of the frames of the image data; Obtaining file size information on each of frames of image data corresponding to the set interval from the file size information for each of the frames of the read image data; Calculating a file size of image data to be exported based on the acquired file size information; And And displaying the calculated file size through a display unit, Wherein the file size information includes time information of each of the frames and size of each of the frames. 12. The method of claim 11, And selecting a capacity measurement menu for displaying the calculated file size via the display unit. 12. The method of claim 11, Further comprising displaying information on whether the capacity of the storage unit is usable before exporting the image data to the storage unit. The method of claim 11, further comprising displaying a status of exporting the image data when the export is proceeding. A storage unit for storing image data and index data including file size information of each of frames constituting the image data; An input unit for receiving a part of the image data from the image data as an interval for performing an export; A control unit for reading the index data of a frame included in an interval for performing the export; And And a calculation unit for calculating a file size of image data corresponding to an interval to be exported based on the read index data. 16. The method of claim 15, Further comprising a display unit for displaying information indicating whether the capacity of the storage unit is usable before exporting the image data to the storage unit. 16. The method of claim 15, And a display unit for displaying the export status of the image data when the export is proceeding. A method for providing a file size of an export file performed in a DVR device, Storing image data; Generating index data in which file size information of each of frames constituting the image data is recorded; Reading the index data for a frame included in an interval to be exported from the image data; And And calculating a file size of image data to be exported based on the file size information recorded in the read index data, Wherein the file size information comprises a file size of each of the frames.

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