KR100798152B1 - Method and apparatus for recording and reproducing video data - Google Patents

Abstract

Disclosed are a video data recording / reproducing method and apparatus for outputting a captured image to a display unit for monitoring and storing the image data for later playback. The method and apparatus may include converting analog video data of a photographing location input through a camera into digital data, encoding the converted digital video data, and converting the encoded digital video data into a first divided area of a display unit. Outputting a real time output; storing the encoded digital video data; reading the stored digital video data; and outputting the read digital video data to a second divided area of a display unit. Process the data, the video data generated at the first time point in the camera and output in the delayed reproduction output step, and generated in the camera at a second time point later than the first time point and output in the real time output step. Video data To ensure that the output to the display unit at the same time allowing to check in real time whether the recording data is recorded normally.

DVR, DVR, Surveillance, Closed Loop, VCR, VRC

Description

Method for recording and reproducing video data and apparatus therefor {Method and apparatus for recording and reproducing video data}

1 is a block diagram of a video data recording / reproducing apparatus according to the present invention;

2 is a flowchart illustrating a process of processing video data in a video data recording / reproducing method according to the present invention implemented through the apparatus of FIG. 1;

3 to 5 are views each showing the screen configuration of the display unit according to the present invention;

6 is a flowchart illustrating a delayed reproduction output process in the apparatus of FIG. 1;

7 is a block diagram showing a modification of the apparatus shown in FIG.

Explanation of symbols on the main parts of the drawings

114: quad 116: encoder

118: graphics processor 120: display unit

121: first area 128: second area

130: control unit 132: auxiliary memory device

The present invention relates to a method and a device for recording and reproducing video data, and more particularly, to recording and outputting to a display unit a camera that requires monitoring, and to recording and reproducing the video data for later playback. The present invention relates to a reproduction method and an apparatus thereof.

A video data recording / reproducing apparatus, such as a digital video recorder or a videocassette recorder, may be used to photograph, record, and play back a place requiring surveillance.

A conventional video data recording / reproducing apparatus such as a television outputs the input video data to the display unit, records the signal in the auxiliary storage device, and later plays the recorded file in the reproducing mode to view the necessary image when necessary. It was made.

In the case of using the conventional video data recording / reproducing apparatus as described above, it is not possible to confirm whether the apparatus is normally operated and whether or not there is an error in the file at the time of recording.

It is an object of the present invention to provide a video data recording / reproducing method which can monitor in real time that input video data is recorded without error.

Another object of the present invention is to provide a video data recording / reproducing apparatus for implementing the method of the present invention.

 A video data recording / reproducing method according to the present invention comprises the steps of converting analog video data of a photographic location input through a camera into digital video data, encoding the converted digital video data, and displaying the encoded digital video data. A real-time output step of outputting the negative divided first area, storing the encoded digital video data, reading the stored digital video data, and outputting the read digital video data to the second divided area of the display unit. Including a delayed playback output step,

Video data generated at the first time point in the camera and output in the delayed reproduction output step and video data generated in the camera at the second time point later than the first time point and output in the real time output step are simultaneously output to the display unit. Be sure to

The method may further include decoding the read digital video data and encoding the decoded digital video data together with the digital video data converted in the converting step.

The method may further include checking an increase of a record cluster point when storing the video data currently being input, and checking an error through a part of reading the stored video data, and generating an error signal if there is an error.

Checking the video data of the decoding, decoding the decoded digital video data together with the digital video data converted in the converting step, and checking the video data of the delayed reproduction output step, and checking whether there is an error of the video data. It is preferable to include the step of generating an error signal if there is a result error.

In accordance with another aspect of the present invention, a video data recording / reproducing apparatus includes a camera that generates video data of a photographing location, an encoder that encodes video data generated by the camera, a graphic processor that receives and processes the encoded video data, and outputs the processed video data to a display unit. A secondary memory device for storing the encoded video data, a control unit for controlling the operation of the components according to the loaded program, and a main memory device to be loaded and the program to be processed and processed in the control unit is configured through a camera A video recording / reproducing apparatus which processes input video data and outputs it to a display unit to encode the video data into an auxiliary memory device while allowing a monitor to watch the display unit and monitor a photographing location of the camera.The coder applies the encoded video data to the graphic processor and the controller, respectively, and the controller reads the digital video data generated at the first time point in the camera, converted into digital video data, encoded, and stored in the auxiliary memory device. The encoded video data, which is currently applied from the encoder, is stored in the auxiliary storage device, and the graphics processor is generated by the camera at a second time later than the first time. The video data encoded and applied by the encoder is output to the first area of the display unit, and the video data read and applied by the auxiliary storage device is output to the second area of the display unit.

And an A / D converter for converting analog video data generated by the camera into digital video data. The video data of a plurality of screens inputted from a plurality of cameras between the A / D converter and the encoder is further included. A quad is preferably provided which combines video data of four screens, time-divisions, and outputs a data stream to the encoder.

A decoder is provided between the control unit and the quad for decoding the read digital video data and applying the quad to the quad.

The auxiliary storage device is a hard disk, the video data recording / reproducing device is a TV, and the control unit checks an increase in record cluster points when storing the video data currently being input in the auxiliary storage means, and the read video. Compared with the data portion, it is possible to determine whether the current auxiliary storage device is in normal operation and to generate an error signal of the auxiliary memory device when the normal operation is not performed.

The display unit may be configured as one display divided into a plurality of areas, and the first area and the second area may be divided areas within the display.

The display unit may include a plurality of displays, and the first area and the second area may have a separate display.

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

1 is a block diagram of a video data recording / reproducing apparatus according to the present invention.

In FIG. 1, the camera 110 is a part that generates video data of a photographing location. The analog video data generated by the camera 110 is converted into digital video data by the A / D converter 112. The A / D converter 112 is a circuit for converting analog video data into digital video data. The A / D converter 112 converts analog video data into digital video data using an ITU-R BT.656 signal method, which is a general digital video signal. The digital video data converted by the A / D converter 112 is applied to the quad 114.

Quad (114) is a video multiplexer (Video Multiplexer) refers to a video stream of video data by combining video data of multiple input video screens into video data of one screen and time-dividing the data stream (Data Stream) It is a circuit that outputs, usually called quad.

The video data output in the form of a data stream from the quad 114 is input to the encoder 116 and encoded according to a standard such as Moving Picture Experts Group. The encoded video data is applied to the graphic processor 118 and output to the predetermined area of the display 120. The display 120 divides one screen into a plurality of areas so that video data input from each camera can be classified and output for each camera.

Meanwhile, the video data encoded by the encoder 116 is stored in the auxiliary memory device 132 such as a hard disk by a command from the controller 130. In the present invention, an index file is constructed when video data is stored in the auxiliary memory device 132. This index file consists of the time when the video data is recorded to a file, the file number, the file pointer of the file, the channel being recorded, and a counter that is incremented by 100 ms. . Therefore, if you look at this index file at the specific time you want to check, you can check the recorded channel, and you can also check whether the recording has been stopped or recording is continued according to the increase of the 100ms counter.

In general, the recording device forms a cluster that is a combination of 32 to 64 sectors based on the most basic unit called a sector composed of 512 bytes, and generates a FAT (File Allocation Table) for managing the clusters. Configure. The file consists of a combination of several clusters. Normally, one cluster is composed of 32 ~ 64 kbytes. The number of clusters in the file is determined by the file size. The cluster will have its own unique number. The FAT is a table that manages the cluster's link values. If the initial fats all start with a default value of "0", each time a file is created, it finds an empty cluster with a link value of 0 from the cluster with the lowest number (No) and starts this cluster. Whenever the size increases, the cluster is searched for an empty cluster and the number of clusters found in the link is formed. This operation is called cluster chainning.

Therefore, when video data is recorded to a file, a start cluster is created, and an empty cluster continues to form a file. The last cluster that records video data is referred to as a record cluster pointer.

The controller 130 controls the operations of peripheral devices such as the encoder 116, the decoder 136, the auxiliary memory device 132, and the graphics processor 118 according to the loaded program so that the video data can be processed. It checks the operation of peripheral devices and whether there is an error of processed video data, and plays an role of generating an error signal when there is an error. The controller 130 is a reduced instruction set computer (RISC) microcontroller unit (MCU).

The error checking is explained as follows. That is, the controller 130 stores the input video data in the auxiliary memory device 132 and configures an index indicating the state of each of the additionally input video data. Enable error discrimination. In detail, through an increase check of a record cluster pointer when storing video data currently being input to an auxiliary memory device 132 such as a hard disk, and a part of reading stored video data. By determining whether the current auxiliary memory device 132 is operating, the operation of the auxiliary memory device 132 and the presence of an error may be confirmed.

In addition, by reading the read video data through the decoder 136, it is possible to determine the normal operation of the decoder 136 and whether there is an error. The decoder 136 may check whether there is an error through a decoder watch dog function. The decoder watch dog reads the state of the decoder 136 in the playback mode, and when the decoder 136 is not in a running state or requests a data stream and there is no response for a predetermined time, the decoder 136 It is a function to reset.

In addition, the video data from the decoder 136 is input to the quad 114 together with the video data currently input from the camera 110, and the data output from the quad 114 is input to the graphic processor 118. By checking the signal output from the graphic processor 118, it is determined whether the quad 114 and the graphic processor 118 operate normally.

The graphic processor 118 checks the movement value of the mouse at an interrupt and sprites the cursor on the screen. The graphic processor 118 also receives an error based on whether the cursor sprite is moved. You can check

As described above, if each element does not operate normally or there is an error, an error signal is generated and transmitted to the monitor 120 or the person concerned.

The error signal may be output as a text on the screen or may generate an error signal sound through the speaker 150, or may be associated with a related person via a network interface 138, a wired or wireless communication network 140 or 142, or a wireless terminal 144 or 146. Send an error message such as e-mail. That is, a monitor or a remote person who monitors the display unit 120 can quickly recognize the failure of the video data recording / reproducing apparatus 100, and can quickly recover an abnormality such as a DVR. The main memory device 134 is loaded with a program to be executed in the controller 130 and data to be processed.

The decoder 136 is provided between the controller 130 and the quad 114. The decoder 136 decodes the video data read from the auxiliary memory device 132 in the playback mode and sends the decoded video data to the graphic processor 118 to be output to the display unit 120. In addition, the decoder 136 receives and decodes the encoded video data stored in the auxiliary memory device 132 and applies it to the quad 114. Accordingly, the quad 114 has the video data that is generated at the first time point in the camera 110 and stored in the auxiliary memory device 132 through a predetermined process, read and applied from the decoder 136, and later than the first time point. For example, video data generated by the camera 110 and converted into a digital signal by the A / D converter 112 and input at the second time 10 seconds later than the first time is simultaneously applied. The video data applied to the quad 114 is encoded by the encoder 116 and sent to the graphic processor 118, and the graphic processor 118 is the video data generated at the first time point and the second time point at the camera 110. The generated video data is output to the divided area of the display unit 120.

Of course, the video data generated at the second time point in the camera 110 is sequentially stored in the auxiliary memory device 132 after being encoded by the encoder 116.

The monitor who monitors the display unit 120 checks in real time whether the image is normally taken and output to the display unit 120 while watching the screen output to the display unit 120 and whether the video data of the photographing location is normally recorded. Can be.

The process of the video data storage / playback method according to the present invention implemented in the apparatus as shown in FIG. 1 will be described with reference to FIGS. 2 to 5 as follows.

2 is a flowchart illustrating a process of processing video data in a video data recording / reproducing method according to the present invention implemented through the apparatus of FIG. 1, and FIGS. 3 to 5 are diagrams respectively illustrating screen configurations of a display unit according to the present invention. .

The camera 110 generates analog video data of the photographing location (step 1). The number of cameras 110 is determined according to the number of places to be monitored. In the present embodiment, a case of using eight cameras 110 will be described.

The analog video data generated by each camera 110 is applied to the A / D converter 112, and the A / D converter 112 converts the applied analog video data into digital video data, respectively (step 2).

The digital video data converted in step 2 is applied to the quad 114. The quad 114 is then digitally present with the current digital video data for the various screens applied in step 2 and previously generated, for example, 5-10 seconds ago, stored in the secondary memory 132 and then read by the camera. The video data is combined into video data of one screen (step 3).

Video data combined into video data of one screen is applied to the encoder 116 and encoded by the encoder 116 (step 4).

The video data encoded by the encoder 116 is generated at a first first time in the camera 110 and stored in the auxiliary memory device 132 and then read. The video data is stored at the second time later than the first time. The output path is determined differently according to whether the video data is generated and is newly inputted (step 5).

The video data generated at the second time point is output in real time to the first area 121 of the display 110. 3 to 5, the first region 121 is a portion in which real-time video data is output and is divided into various regions according to the number of cameras 110. In this embodiment, it is divided into eight zones.

The video data generated at the first time point is delayed and outputted to the second area 128 of the display unit 120 (step 7). The second region 128 is a portion in which read and reproduced video data is output, and may be divided into several zones, for example, four zones as necessary. That is, the video data generated by the eight cameras 110 may be divided into four and divided into two to be displayed alternately.

On the other hand, the video data generated at the second time point is stored in the auxiliary memory device 132 following the previously generated and stored video data (step 8).

 The stored video data is read from the secondary storage device 132 (step 9), decoded (step 10) and subsequently applied to the quad 114.

If there is no video data stored in the auxiliary memory device 132 initially, no image is displayed in the second area 128 of the display unit 120 as shown in FIG. Of course, the second region 128 may be kept in an off state in some cases. In this case, as shown in FIG. 3, video data currently being captured by the camera 110 is output in real time only to the first region 121. The video data is not output to the second area 128.

4 illustrates that the video data of the screens of the channels 1 to 4 is delayed and reproduced in the second region 128, and FIG. 5 is the delay of the video data of the screens of the channels 5 to 8 in the second region 128. The playback output is shown.

That is, in the video data storage / playback method according to the present invention, the video data generated at the first point in time of the camera 110 and delayed-played and generated in the camera 110 at a second point later than the first point of view are generated in real time. The output video data is simultaneously output to the display unit 120, so that the monitor 120 may check whether the captured video data is properly stored.

In the present invention as described above, when video data is input, the video data is encoded and stored in the auxiliary memory device 132 such as a hard disk. In this case, if the previous data recorded in the auxiliary memory device from the record pointer is 5 to 10 seconds in the state where the delayed reproduction output is possible, the present invention clusters the data to be delayed and reproduced to the second area of the display unit. Construct a chain table.

The values of the cluster chain table configured as described above are sequentially read to give video data to the decoder 136, and the video data from the decoder 136 is transmitted through the quad 114 and the graphic processor 118 through the second area ( 128, the monitor can monitor the video data that is currently input and output to the first region 121.

The screen of the second area 128, which is delayed-playing output, can be adjusted by programming the number and time of division, and the video data generated by the cameras recorded according to the adjusted number of divisions is read and shifted by the time specified in the monitor. The corresponding data is displayed.

6 is a flowchart illustrating a delayed reproduction output process in the apparatus of FIG. 1.

After converting the analog signal generated by the camera 110 into digital video data in the A / D converter 112, it is determined whether it is in the recording mode (step 20), and in the recording mode, the converted digital video data is encoded (step 21). Error check (step 22) and store in auxiliary memory 132 (step 23), otherwise terminate.

Error check the video data stored in the auxiliary storage device 132 (step 24), and continuously determine whether the delayed playback output mode (step 25), and if the delayed playback output mode, the video data recorded on the basis of the current recording pointer in advance It is determined continuously whether there is, for example, 5 to 10 seconds by a predetermined amount (step 26).

If there is a predetermined amount of video data, it is determined whether the delayed reproduction is being output (step 27), and if it is not during the delayed reproduction output, the cluster chain table is constructed for a predetermined amount of stored video data, for example, 5 to 10 seconds. (Step 28), video data of the cluster is read sequentially from the configured table (step 29). Step 28 is omitted if the delayed reproduction is in progress.

Check the error of the read video data (step 30), encode the read video data (step 31), check the error of the encoded video data (step 32), and display the encoded video data in the second area of the display unit. In step 128, the delayed reproduction is output (step 33). The error is also checked during the printing process (step 34).

If all of the data of the read cluster have been delayed reproducing (step 35), it is determined whether all of the data of the configured clusters have been delayed reproducing (step 36). Go back and repeat the process described earlier. Accordingly, the device of FIG. 1 reproduces the video data generated by the camera according to the user's selection and output to the first area of the display unit in real time and stored in the auxiliary memory device 132 such as a hard disk. Simultaneously with the image output in real time to the region 128, the monitor may monitor the photographing location to check whether the photographing data is normally recorded in the auxiliary memory device in near real time.

7 is a block diagram showing a modification of the apparatus shown in FIG.

In the apparatus shown in FIG. 1, the first region 121 and the second region 128 are configured as one display. However, in some cases, the first region 121 and the second region 128 are separately displayed. 1 and display 2 (120a, 120b) can be divided into configurations.

That is, the video data read from the auxiliary memory device 132 is decoded by the decoder 136 to be output through the graphic processor 2 118b to the second area 128 composed of the separate display 2 120b and the camera. The video data inputted through the video signal and then directly output to the display 120 may be configured to be output to the display 1 120a through the graphic processor 1 118a. The rest is the same as described earlier.

Referring to the above, it can be easily seen that the divided regions of the first region 121 and the second region 128 can also be replaced with a plurality of separate displays.

According to the present invention described above, the delayed playback output for re-reading the data of the currently input video data and the recorded data is inputted through the decoder and the input video data into the quad to monitor the two video data together. It can check the normal recording of video data input through the function and the failure of auxiliary storage device such as hard disk, and it can be supplemented quickly through the message sent when an error occurs.

The biggest advantage of the present invention is that it is possible to simultaneously monitor the recording and playback in real time, it is possible to quickly supplement through the error message.

Claims (11)

A conversion step of converting analog video data of a photographing location input through a camera into digital video data; Encoding the converted digital video data; A real time output step of outputting the encoded digital video data to a divided first area of a display unit; Storing the encoded digital video data; Reading the stored digital video data; Decoding the read digital video data; Encoding the decoded digital video data together with the digital video data being converted in the converting step; And And a delayed reproduction output step of outputting the read digital video data to a second divided area of the display unit. Checking an increase of a record cluster point when storing the currently input video data, and checking an error through a part of reading the stored video data, and generating an error signal if there is an error, Video data generated at the first time point in the camera and output in the delayed reproduction output step and video data generated in the camera at the second time point later than the first time point and output in the real time output step are simultaneously output to the display unit. Video data recording / playback method having a function of checking whether there is a stored data error. delete delete A conversion step of converting analog video data of a photographing location input through a camera into digital video data; Encoding the converted digital video data; A real time output step of outputting the encoded digital video data to a divided first area of a display unit; Storing the encoded digital video data; Reading the stored digital video data; Decoding the read digital video data; Encoding the decoded digital video data together with the digital video data newly converted in the converting step; A delayed reproduction output step of outputting the read digital video data to a second divided area of the display unit; And Checking the video data of the delayed playback output step to check whether there is an error of the video data; Generating an error signal if there is an error as a result of the checking in the checking step, Video data generated at the first time point in the camera and output in the delayed reproduction output step and video data generated in the camera at the second time point later than the first time point and output in the real time output step are simultaneously output to the display unit. Video data recording / playback method having a function of checking whether there is a stored data error. A camera for generating video data of a photographing location, an encoder for encoding video data generated by the camera, a graphic processor for receiving and processing the encoded video data and outputting the encoded video data to a display unit, and an auxiliary memory device for storing the encoded video data. And a control unit for controlling the operation of the components according to the loaded program, and a main memory unit in which the program and data to be executed and processed by the control unit are loaded. The video data input through the camera is processed and output to the display unit. A video data recording / reproducing apparatus for encoding a video data with an encoder and storing the video data in an auxiliary memory device while allowing a monitor to watch the photographing location of the camera. An A / D converter for converting analog video data generated by the camera into digital video data; A quad configured to combine video data of multiple screens input from multiple cameras between the A / D converter and the encoder into video data of one screen, and time-division to output a data stream to the encoder; And A decoder configured to decode digital video data read by the controller between the controller and the quad and apply the decoded digital video data to the quad; The encoder applies the encoded video data to the graphic processor and the controller, respectively. The controller converts the digital video data generated at the first point in time from the camera to digital video data, encodes the digital video data stored in the auxiliary memory device, and applies the digital video data to the graphic processor. Video data is stored in the auxiliary storage device, The graphic processor outputs video data generated by the camera at a second time later than the first time and encoded and applied by the encoder to the first area of the display unit, and is read and applied by the auxiliary memory device. Data is output to the second area of the display unit; The controller checks an increase in the record cluster point when storing the video data currently being input to the auxiliary storage means, compares the read video data with the read video data portion, and determines whether the auxiliary storage device is currently operating normally. And a storage data error check function, wherein an error signal of the auxiliary storage device is generated. delete delete 6. The video data recording / reproducing apparatus according to claim 5, wherein the auxiliary memory device is a hard disk and the video data recording / reproducing device is a DVD. A camera for generating video data of a photographing location, an encoder for encoding video data generated by the camera, a graphic processor for receiving and processing the encoded video data and outputting the encoded video data to a display unit, and an auxiliary memory device for storing the encoded video data. And a control unit for controlling the operation of the components according to the loaded program, and a main memory unit in which the program and data to be executed and processed by the control unit are loaded. The video data input through the camera is processed and output to the display unit. A video data recording / reproducing apparatus for encoding a video data with an encoder and storing the video data in an auxiliary memory device while allowing a monitor to watch the photographing location of the camera. An A / D converter for converting analog video data generated by the camera into digital video data; A quad configured to combine video data of multiple screens input from multiple cameras between the A / D converter and the encoder into video data of one screen, and time-division to output a data stream to the encoder; And A decoder configured to decode digital video data read by the controller between the controller and the quad and apply the decoded digital video data to the quad; The encoder applies the encoded video data to the graphic processor and the controller, respectively. The controller converts the digital video data generated at the first point in time from the camera to digital video data, encodes the digital video data stored in the auxiliary memory device, and applies the digital video data to the graphic processor. Video data is stored in the auxiliary storage device, The graphic processor outputs video data generated by the camera at a second time later than the first time and encoded and applied by the encoder to the first area of the display unit, and is read and applied by the auxiliary memory device. Data is output to the second area of the display unit; The controller determines whether the decoder operates normally by reproducing the read video data through a decoder, inputs the video data output from the decoder into a quad together with the video data currently being input, and outputs the data output to the quad. It is determined whether the quad and the graphic processor operate normally by checking the video data inputted to the graphic processor and outputting the graphic processor. If an error is found, an error signal is generated. And the auxiliary memory device is a hard disk, and the video data recording / reproducing device is a DVD. delete delete

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