JP2004254248A - Moving image conversion apparatus and monitoring system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it is necessary not only to immediately view monitoring video on a mobile terminal when an abnormality is detected, but also to use video of higher definition to confirm the situation in post-processing after the abnormality is confirmed. <P>SOLUTION: A moving image conversion apparatus has a means 110 for converting first moving image encoding data separated from a video input into second moving image encoding data of a format suited for viewing on the mobile terminal and a means 105 for storing the first moving image encoding data or sub moving image encoding data resulting from thinning the first moving image encoding data. When the abnormality is detected, the first moving image encoding data are transmitted from a moving image output part 106 to the mobile terminal and in post-processing, the first moving image encoding data or the sub moving image encoding data obtained by thinning the first moving image encoding data are viewed on a client PC. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a moving image conversion device that converts moving image data and transmits the converted data to a mobile terminal of a user, and a monitoring system using the moving image conversion device.
[0002]
[Prior art]
With the rapid development of moving image processing technology, it is widely used to handle moving images as digital data. In recent years, it has become common to distribute and store moving images as encoded data of an encoding scheme such as MPEG-1, 2, 4 or the like.
[0003]
In addition to decoding the encoded data with a video device or computer and viewing the moving image, the encoded data is decoded with a mobile terminal (for example, a mobile phone, a PDA (Personal Data Appliance), etc.) A viewing service has also been put to practical use.
[0004]
However, when watching a surveillance video encoded by an encoding method such as MPEG-1, 2, 4 or the like via a network, if the bit rate of the encoded data is high, viewing on a portable terminal becomes difficult. .
[0005]
For this reason, what has become a problem when viewing a moving image on a mobile terminal is a narrow communication band. In order to solve this, a technique for reducing the bit rate of encoded data has been proposed (Patent Document 1).
[0006]
However, when the bit rate is reduced, the image quality of the moving image is significantly deteriorated. Therefore, it is desirable to convert to an encoding method with good image quality even at a low bit rate. Patent Document 2 proposes a technique for converting a moving image encoding method.
[0007]
By such a technique of reducing the bit rate or converting the encoding method, the encoded data can be received in real time by the mobile terminal even when the communication band is narrow, and the moving image can be reproduced without interruption.
[0008]
Moreover, it is not realistic to always monitor using a portable terminal in a remote place. Therefore, Patent Document 3 proposes a method of detecting an abnormality at a monitoring site and encoding and sending it in a data format suitable for a mobile terminal that receives the captured video.
[0009]
[Patent Document 1]
JP 2001-339460 A
[0010]
[Patent Document 2]
JP 2002-185969 A
[0011]
[Patent Document 3]
JP 2002-279558 A
[0012]
[Problems to be solved by the invention]
As described above, when an abnormality is detected, it is useful to immediately report the situation to the mobile terminal with an image, but in general, the screen of the mobile terminal is narrower and the number of pixels is smaller than that of a home television. On the other hand, surveillance video is often required to have the same image quality as home television.
[0013]
Therefore, when encoding is performed in a data format suitable for a mobile terminal, the monitoring target becomes small and difficult to see. In addition, after confirming the contents of the abnormal situation, a higher-definition surveillance video may be required as a post-measure. Further, by storing an event in which an abnormality is detected as metadata together with the encoded video data, it becomes easy to search for a video of an abnormal situation during a subsequent countermeasure. Note that “metadata” is additional information for associating video information and event information, and some of them are standardized by MPEG-7, for example.
[0014]
Therefore, in the present invention, when an abnormality is detected, the mobile terminal is immediately notified with a video, and a video with a higher definition than the video sent to the mobile terminal and a event in which the abnormality is detected are stored as metadata for a subsequent measure. Thus, a moving image conversion device and a monitoring system using the same are provided.
[0015]
[Means for Solving the Problems]
According to the first aspect of the present invention, the data acquired by the image acquisition device capable of acquiring the data including the first encoded data obtained by encoding the moving image by the first encoding method is received from the trigger generation unit under a predetermined condition. A moving image conversion apparatus for providing an image reproduction apparatus capable of reproducing an image by decoding second encoded data encoded by a second encoding method in response to a supplied event trigger, Input means for inputting data including the first encoded data from the acquisition device, separation means for separating the first encoded data from the input data, and the separated first encoded data Decoding means for generating a moving image by decoding, and a process for converting the generated moving image into a moving image having a screen size or a frame rate corresponding to the image reproduction of the image reproducing apparatus. Means, encoding means for encoding the modified moving image by a second encoding method to generate second encoded data, and responding to the input event trigger with the second encoded data. And an output means for outputting to the image reproduction device.
[0016]
The invention according to claim 2 corresponds to a third encoded data generating means for generating third encoded data obtained by thinning a frame from the separated first encoded data, and a time when the event trigger is input. A thumbnail generating unit that generates a thumbnail from the first encoded data; a storage unit that stores the generated third encoded data and the generated thumbnail; and a plurality of the stored thumbnails 2. A selection means for selecting one thumbnail, and a second output means for outputting third encoded data corresponding to the thumbnail selected by the selection means from the storage means. It is a moving image conversion apparatus of description.
[0017]
According to a third aspect of the present invention, the storage unit stores the second encoded data together with the third encoded data and the thumbnail, and the second output unit stores the second encoded data in the thumbnail selected by the selection unit. 3. The moving image conversion apparatus according to claim 2, wherein the second encoded data is output from the storage unit together with the corresponding third encoded data.
[0018]
According to a fourth aspect of the present invention, there is provided a monitoring system using the moving image converting apparatus according to at least one of the first to third aspects, wherein the image reproducing apparatus is a portable terminal. It is.
[0019]
The invention of claim 5 is a monitoring system using the moving image conversion device according to at least one of claims 1 to 3, wherein the image acquisition device is a camera, and the trigger generation device is It is a monitoring system characterized by being a sensor that supplies an event trigger in the event of an abnormality.
[0020]
A sixth aspect of the present invention is a monitoring system using the moving image converting apparatus according to at least one of the first to third aspects, wherein the selection means is a client terminal connected to a network. It is the monitoring system characterized by this.
[0021]
According to a seventh aspect of the present invention, the data acquired by the image acquisition device capable of acquiring the data including the first encoded data obtained by encoding the moving image by the first encoding method is received from the trigger generating unit under a predetermined condition. A moving image conversion method provided to an image reproduction apparatus capable of reproducing an image by decoding second encoded data encoded by a second encoding method in response to a supplied event trigger, An input step in which data including the first encoded data is input from an acquisition device, a separation step in which the first encoded data is separated from the input data, and the separated first encoded data Decoding step of decoding and generating a moving image, and transforming the generated moving image into a moving image having a screen size or a frame rate corresponding to image reproduction of the image reproducing device A transformation step for performing the processing, an encoding step for generating the second encoded data by encoding the modified moving image using the second encoding method, and an event in which the second encoded data is input. And an output step of outputting to the image reproduction device in response to a trigger.
[0022]
In the invention according to claim 8, the data acquired by the image acquisition apparatus capable of acquiring data including the first encoded data obtained by encoding the moving image by the first encoding method is received from the trigger generation unit under a predetermined condition. A computer program capable of realizing a moving image conversion method provided to an image reproduction apparatus capable of reproducing an image by decoding the second encoded data encoded by the second encoding method in response to the supplied event trigger An input function for inputting data including the first encoded data from the image acquisition device, a separation function for separating the first encoded data from the input data, and the separated first A decoding function for decoding one encoded data to generate a moving image, and the generated moving image to a screen size or frame corresponding to the image reproduction of the image reproducing device. A transform function for performing a process of transforming into a moving image of a video, an encoding function for encoding the deformed moving image with a second encoding method to generate second encoded data, and the second An output function for outputting encoded data to the image reproduction apparatus in response to the input event trigger.
[0023]
In the present invention, the second encoded data is distributed to an image reproduction device such as a portable terminal, and the third encoded data for post-processing is stored in the storage means.
[0024]
The third encoded data for post-processing is higher quality than the second encoded data for the mobile terminal, and is a quasi-moving image generated by thinning out the input first encoded data. Further, the event in which the abnormality is detected is stored as metadata associated with the accumulated second encoded data or the third encoded data of the semi-moving image.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
(1) Contents of the monitoring system 310
FIG. 2 is a diagram illustrating a method of using the monitoring system 310 using the transcode server 300 which is a moving image conversion apparatus according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a monitoring system 310 according to an embodiment of the present invention.
[0026]
The monitoring site 201 is provided with a monitoring system 310 and detects an abnormality using the analysis result of the video captured by the camera 301 and the sensor 302. The detected abnormality is supplied to the transcode server 300 as an event trigger.
[0027]
The camera 301 has a built-in function for encoding the shot video into MPEG-1, 2, 4 or motion JPEG with a relatively high image quality, or an MPEG-1, 2, 4 or motion JPEG encoder (not shown). The captured video is compressed to a high image quality and then supplied to the transcode server 300. Here, the DV format used in the digital camcorder is also referred to as motion JPEG hereinafter.
[0028]
Supply of the compressed video to the transcode server 300 may be performed directly from the camera 301 or the encoder, or may be supplied via the network 303 in the monitoring site 201.
[0029]
Note that the above-described analysis of the video captured by the camera 301 may be performed in the camera 301 or may be performed in the transcode server 300 using the video supplied to the transcode server 300.
[0030]
In the transcoder server 300, the video shot before and after the time when the event trigger is supplied is converted into a small screen / low bit rate MPEG-4 suitable for the mobile terminal 202, and then attached to an e-mail. Transmit to the terminal 202.
[0031]
The transmitted mail is supplied to the external network 203 via the network 303 in the monitoring site 201 and delivered to the mobile terminal 202.
[0032]
The viewer can instruct post-processing to the monitoring site 201 after confirming the abnormal condition detected by the mobile terminal 202.
[0033]
(2) Check the status on the mobile terminal 202
FIG. 4 illustrates an example of checking the situation with the mobile terminal 202.
[0034]
When the mail 401 sent by the portable terminal 202 is opened, a video is attached together with a sentence notifying that an abnormality has been detected.
[0035]
When an operation for confirming the content of the attached video is performed on the portable terminal 202, the video 402 before and after the time when the abnormality is detected is reproduced. Here, it is described that the video itself is attached to the mail 401, but the video is stored in a mail server (not shown), and only the pointer is attached to the mail so that the viewer can watch it. In some cases, it is sent to the portable terminal 202 only when desired.
[0036]
In addition, when high-quality monitoring video is stored in the storage device in the transcode server 300, the client terminal 304 connected to the network 303 in the monitoring site 201 is used depending on an instruction from the viewer. Detailed situation can be confirmed.
[0037]
Hereinafter, an embodiment of the transcode server 300 will be described.
[0038]
(3) Contents of transcode server 300
The transcode server 300 according to the first embodiment of the present invention will be described below with reference to the drawings.
[0039]
(3-1) Configuration of transcode server 300
FIG. 1 is a configuration diagram of a transcode server 300 according to the present embodiment.
[0040]
In the transcode server 300, the video input supplied from the camera 301 etc. includes system information (MPEG-2 system etc.), network protocol information (RTP header etc.), etc. in addition to the encoded data of the moving picture. Yes.
[0041]
Therefore, as shown in FIG. 1, a moving image separation unit 101 for separating moving image encoded data from a video input, and a number of frames and image resolution for thinning out the separated moving image encoded data. The moving image thinning unit 102 and the encoded moving image are encoded so that the viewer can view the encoded data of the separated moving images on the mobile terminal, or the moving image can be stored in the transcoding server 300 for a long time. A moving image conversion unit (transcoder) 110 that converts a method, a bit rate, a screen size, and the like, a moving image output unit 106 that transmits encoded data of the converted moving image to a portable terminal, and a converted moving image A moving image storage unit 105 that stores encoded data, encoded data of a moving image thinned out by the moving image thinning unit 102, and readout for reading arbitrary data stored in the moving image storage unit 105 Provided with a control unit 108.
[0042]
The operation of the moving image thinning unit 102, the moving image output unit 106, and the moving image conversion unit (transcoder) 110 is determined based on the profile of the mobile terminal for viewing the video and the event trigger information supplied from the sensor 302 or the like. A transcode control unit 107 for controlling.
[0043]
The moving image conversion unit (transcoder) 110 is modified with a moving image deformation unit 103 that deforms the moving image obtained by decoding the encoded data of the read moving image so that the mobile terminal 202 can easily view the moving image. A moving image encoding unit 104 that encodes the moving image in a format that can be viewed on a user's mobile terminal.
[0044]
In the present embodiment, the audio encoded data is not specifically described, but the encoding method and the bit rate are converted so that the portable terminal 202 can view and the data is easily stored in the transcoding server for a long time. You can also. Further, when only the image is monitored, it is not necessary to use audio data.
[0045]
Each function of each of the units 101 to 110 can be realized by a program stored in the transcode server 300 that is a computer.
[0046]
(3-2) Operation of transcoding server 300
The basic operation of the transcode server 300 is as follows.
[0047]
First, the moving image separation unit 101 separates the encoded data of the moving image from the video input supplied directly from the camera 301 or via the network 303 and the like, and the moving image thinning unit 102 and the moving image deformation unit 103 Supply.
[0048]
The transcode control unit 107 selects the moving image thinning unit 102, the moving image according to the profile of the viewer's mobile terminal 202 (for example, e-mail address, reproducible encoding method, network access method, etc.) and the event trigger. The converter (transcoder) 110 and the moving image output unit 106 are controlled.
[0049]
The reading thinning unit 102 thins out the number of frames of the encoded data of the moving image, and creates an image with the resolution further thinned in response to a request from the transcode control unit 107 and stores it as a thumbnail in the moving image storage unit 105. Here, the “thumbnail” is a still image obtained by reducing a frame at a certain time before and after the occurrence of the event in order to obtain an outline of the contents of the event.
[0050]
The moving image conversion unit (transcoder) 110 decodes the encoded data supplied from the moving image separation unit 101 based on a request from the transcode control unit 107 by the moving image deformation unit 103 and performs deformation processing. The moving image encoding unit 104 performs encoding. And it outputs toward the viewer's portable terminal 202 from the moving image output part 106. FIG.
[0051]
Furthermore, the encoded data encoded by the moving image encoding unit 104 is also stored in the moving image storage unit 105.
[0052]
In response to a request from the client terminal (client PC) 304, the read control unit 108 reads out the encoded data stored in the moving image storage unit 105 and sends it out to the client terminal 304.
[0053]
Note that a plurality of cameras, sensors, and transcode servers may exist in the monitoring system 310. In this case, the moving image storage unit 105 may be shared among the plurality of transcode servers.
[0054]
(3-3) Moving image separation unit 101
The moving image separation unit 101 separates the encoded data of the MPEG-2 moving image from the video input supplied from the camera 301 or the network 303. The separated encoded data is sequentially supplied to the moving image thinning unit 102 and the moving image deforming unit 103.
[0055]
In this embodiment, the video input is assumed to be in the MPEG-2 system. However, if the quality is such that details of the video content can be grasped, other encoding systems (for example, MPEG-1, MPEG-4, H264) are used. Motion JPEG).
[0056]
In addition, the distributed moving image may be encrypted (including scrambled). In this case, the moving image separation unit 101 performs decoding / restoration.
[0057]
(3-4) Moving image thinning unit 102
The moving image thinning unit 102 parses the MPEG-2 encoded data supplied from the moving image separating unit 101 and compresses the intra-frame encoded frame (referred to as an I picture in MPEG-2). As it is extracted and stored in the moving image storage unit 105, a thumbnail corresponding to the event trigger is generated and stored in the moving image storage unit 105.
[0058]
FIG. 5 is a diagram for specifically explaining the operation of the moving image thinning unit 102.
[0059]
For the input video, the MPEG-2 system having a high screen resolution / frame rate / bit rate is used in order to ensure the quality with which the details of the video content can be grasped. In the example of FIG. 5, the screen resolution is 720 × 480 pixels and the frame rate is 30 fps.
[0060]
If the capacity of the moving image storage unit 105 is sufficiently large, it may be stored in the moving image storage unit 105 without performing the above-described frame thinning. However, when the moving image storage unit 105 is shared by a plurality of transcoders or when encoded data of a moving image for a long time is stored, frame thinning is performed.
[0061]
In a standard operation mode, MPEG-2 encoded data includes an I picture once every 15 frames. Therefore, by extracting only the I picture and performing frame thinning, a quasi moving image as shown in FIG. 5 is obtained.
[0062]
Further, the event occurrence time is supplied from the transcode control unit 107 via the line 1071, and the I picture close to the event occurrence time is reduced to, for example, 90 × 60 pixels as shown in FIG. 5 as a thumbnail corresponding to the event. It accumulates in the moving image accumulation unit 105.
[0063]
Here, information that associates the corresponding thumbnail with the I picture that is the source of the thumbnail with respect to the event occurrence time is stored in the moving image storage unit 105 as metadata.
[0064]
(3-5) Moving picture deformation unit 103
The moving image deformation unit 103 includes a decoder 1031 for decoding MPEG-2 and a DSP 1032 for performing deformation on each frame of the moving image.
[0065]
The moving image deforming unit 103 uses the decoder 1031 to decode the encoded data supplied from the moving image separating unit 101. Then, the video obtained by decoding is received from the transcode control unit 107 through the signal line 1072 of the profile of the viewer's mobile terminal 202, and transformed into a screen size or frame rate suitable for the mobile terminal using the DSP 1032. Process. The deformed moving image is supplied to the moving image encoding unit 104.
[0066]
As proposed in Patent Document 2, motion vector information and mode information are also output from the decoder 1031, and the motion vector is transformed according to the profile of the mobile terminal 202 of the viewer using the DSP 1032. You may do it. The deformed motion vector is supplied to the moving image encoding unit 104, and the motion vector detection processing at the time of MPEG-4 encoding can be reduced.
[0067]
The decoder 1031 may be configured as dedicated hardware (semiconductor integrated circuit) or may be realized as software. The DSP 1032 may be processed using a general-purpose CPU.
[0068]
(3-6) Moving picture encoding unit 104
The moving image encoding unit 104 encodes the modified moving image using the MPEG-4 method. In encoding, the bit rate is determined in accordance with the profile of the viewer's mobile terminal 202 received from the transcode control unit 107 via the signal line 1073.
[0069]
In this embodiment, the moving image encoding unit 104 performs encoding using the MPEG-4 system, but performs encoding using other encoding systems (eg, MPEG-1, MPEG-2, H264). You may comprise as follows. Moreover, it may be configured to handle a plurality of encoding methods so that the user can select the encoding method.
[0070]
In the case of supporting a plurality of encoding methods, it is considered that the moving image encoding unit 104 is configured to include a memory and a CPU, and the encoding function is realized by software, so that it is easy to implement.
[0071]
(3-7) Moving image storage unit 105
As illustrated in FIG. 6, the moving image accumulation unit 105 accumulates the metadata 1051, the thumbnail 1052, the quasi moving image 1053, and the encoded data generated by the moving image encoding unit 104.
[0072]
The metadata 1051 associates the event, the thumbnail 1052, the semi-moving image 1053, and the encoded data generated by the moving image encoding unit 104.
[0073]
As an example of association, for event A,
[1] Time: MM minutes SS seconds,
[2] File name of the corresponding thumbnail,
[3] The corresponding semi-video file name,
[4] The file name of the encoded data generated by the corresponding moving image encoding unit 104 can be associated.
[0074]
[3] and [4] are time stamped, and using the time of [1], one frame of the quasi-video at the time corresponding to the event A is extracted as a high-definition still image, or the event A It is possible to reproduce the encoded data generated by the moving image encoding unit 104 from the time corresponding to.
[0075]
(3-8) Moving image output unit 106
As shown in FIG. 7, the moving image output unit 106 includes a ring buffer 1061, and the encoded data generated by the moving image encoding unit 104 is accumulated in the ring buffer 1061 for a certain period of time. The time stamp of the encoded data is associated with the byte position of the ring buffer.
[0076]
Here, when an event occurs, the byte position 1062 on the ring buffer 1061 is specified based on the event occurrence time information supplied from the transcode control unit 107 via the signal line 1074, and the byte position 1062 is stored. The encoded data for a certain period of time 1063 is output to the portable terminal 202. It should be noted that the time 1063 should be determined in accordance with the profile of the portable terminal 202 of the viewer supplied via the signal line 1074.
[0077]
(3-9) Transcode control unit 107
The transcode control unit 107 selects the moving image thinning unit 102 and the moving image conversion according to the profile of the viewer's mobile terminal 202 (for example, an e-mail address, a reproducible encoding method, a network access method, etc.) and an event trigger. Unit (transcoder) 110 and moving image output unit 106 are controlled.
[0078]
Here, the profile of the portable terminal 202 of the viewer may be held in the memory in the transcode control unit 107 or may be given from the outside each time.
[0079]
The moving image thinning unit 102 detects the time when the event trigger is input, and supplies the event occurrence time via the signal line 1071.
[0080]
The moving image transformation unit 103 obtains a screen size and a frame rate suitable for the mobile terminal 202 from the profile of the mobile terminal 202 of the viewer and supplies them through the signal line 1072.
[0081]
A bit rate and an encoding method suitable for the mobile terminal 202 are obtained from the profile of the mobile terminal 202 of the viewer and supplied to the moving image encoding unit 104 via the signal line 1073.
[0082]
For the moving image output unit 106, the reproduction time of the moving image attached to the mail suitable for the portable terminal 202 is obtained from the time when the event trigger is input and the profile of the portable terminal 202 of the viewer, and the signal line Via 1074.
[0083]
(3-10) Read control unit 108
The reading control unit 108 is a device that receives a request from the client PC 304 that is a client terminal, reads out the encoded data of the moving image requested by the user from the moving image storage unit 105, and distributes it to the client PC 304.
[0084]
FIG. 8 is a diagram for explaining an example of a series of operations for distributing and playing back encoded video data stored in the moving image storage unit 105 to the client PC 304 in accordance with a request from the client PC 304. .
[0085]
When a client PC 304 accesses a Web page generated in an HTTP server (not shown) in the transcode server 300, the Web browser 801 is started and a list of thumbnails corresponding to each event is displayed.
[0086]
When an arbitrary thumbnail 802 displayed on the Web browser 801 is clicked, information specifying the thumbnail is sent to the read control unit 108. Here, the click may be either one click or double click.
[0087]
First, the reading control unit 108 refers to the metadata in the moving image storage unit 105 to specify the encoded data file of the moving image corresponding to the thumbnail and the reproduction time thereof.
[0088]
Next, the read control unit 108 reads out the encoded data of the moving image in the moving image storage unit 105 according to the encoded data file of the moving image and the reproduction time thereof, and distributes it to the client PC 304.
[0089]
On the client PC 304, at the same time as clicking an arbitrary thumbnail 802, a moving image viewer 803 for reproducing encoded data of the moving image is activated, and the moving image distributed from the transcode server 300 is reproduced.
[0090]
Further, instead of the encoded data of the moving image, a frame corresponding to the thumbnail of the semi-moving image 1053 may be distributed and displayed on the client PC 304.
[0091]
Here, an example in which encoded data of a moving image is distributed from the transcode server 300 to the client PC 304 is shown. However, the client PC 304 performs remote file reproduction by sharing a file in the moving image storage unit 105. You may do it.
[0092]
(4) Modification
In the moving image conversion unit (transcoder) 110, the encoded data of the converted moving image has a small screen and a low bit rate suitable for viewing on the mobile terminal 202, and during post processing The quality of the moving image viewed on the client PC 304 is low.
[0093]
Therefore, by configuring the moving image conversion unit (transcoder) 110 as shown in FIG. 9, the moving image storage unit 105 has higher quality moving image encoded data than that supplied to the moving image output unit 106. Can be accumulated and used during post-processing.
[0094]
Here, the second DSP 1033 (denoted as DSP 2 in FIG. 9) has the same function as the DSP 1032. However, the second DSP 1033 does not follow the transcode control unit 107 and converts the moving image to a higher resolution and higher frame rate than the DSP 1032.
[0095]
The second moving image encoding unit 1042 (denoted as moving image encoding unit 2 in FIG. 9) may have a different encoding method from the moving image encoding unit 1041, and the encoding bit rate is set to the transcode control unit 107. However, the value may be higher than that of the moving image encoding unit 1041.
[0096]
【The invention's effect】
As described above, according to the present invention, when an abnormality is detected, the mobile terminal is instantly notified with a video, and a higher-definition video and an event in which the abnormality is detected than the video sent to the mobile terminal for a subsequent measure are stored. Saving as data makes it easier to take subsequent measures.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a transcode server according to an embodiment of the present invention.
FIG. 2 is an image diagram illustrating a method of using a monitoring system using a transcode server according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a monitoring system according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating an example of confirming a situation with a mobile terminal.
FIG. 5 is a diagram for specifically explaining the operation of the moving image thinning unit;
6 is a diagram illustrating a configuration of a moving image storage unit 105. FIG.
7 is a diagram illustrating a series of operations of the moving image output unit 106. FIG.
FIG. 8 is a diagram for explaining an example of a series of operations in the read control unit;
FIG. 9 is a diagram illustrating a modification of the moving image conversion unit (transcoder) 110. FIG.
[Explanation of symbols]
101 Video separation unit
102 Moving image thinning part
103 Moving image transformation unit
104 Video encoding unit
105 Moving image storage unit
106 Moving image output unit
107 Transcode controller
108 Read controller
110 Video converter (transcoder)
201 Monitoring site
202 Mobile terminal
203 network
300 transcode server
301 camera
304 Client PC

Claims (8)

The data acquired by the image acquisition device capable of acquiring data including the first encoded data obtained by encoding the moving image by the first encoding method is responsive to the event trigger supplied under a predetermined condition from the trigger generation means. A moving image conversion apparatus that provides an image reproduction apparatus capable of reproducing an image by decoding the second encoded data encoded by the second encoding method,
Input means for inputting data including the first encoded data from the image acquisition device;
Separating means for separating the first encoded data from the input data;
Decoding means for decoding the separated first encoded data to generate a moving image;
Deformation means for performing a process of transforming the generated moving image into a moving image having a screen size or a frame rate corresponding to image reproduction of the image reproducing device;
Encoding means for encoding the deformed moving image with a second encoding method to generate second encoded data;
Output means for outputting the second encoded data to the image reproduction device in response to the input event trigger;
A moving image conversion apparatus comprising: Third encoded data generating means for generating third encoded data obtained by thinning a frame from the separated first encoded data;
Thumbnail generation means for generating a thumbnail corresponding to the time input by the event trigger from the first encoded data;
Storage means for storing the generated third encoded data and the generated thumbnail;
Selecting means for selecting one thumbnail from the plurality of accumulated thumbnails;
Second output means for outputting third encoded data corresponding to the thumbnail selected by the selection means from the storage means;
The moving image conversion apparatus according to claim 1, further comprising: The storage means stores the second encoded data together with the third encoded data and the thumbnail,
3. The moving image according to claim 2, wherein the second output means outputs the second encoded data together with the third encoded data corresponding to the thumbnail selected by the selection means from the storage means. Conversion device. A monitoring system using the moving image conversion apparatus according to at least one of claims 1 to 3,
A monitoring system, wherein the image playback device is a portable terminal. A monitoring system using the moving image conversion apparatus according to at least one of claims 1 to 3,
The image acquisition device is a camera;
The monitoring system, wherein the trigger generation device is a sensor that supplies an event trigger when an abnormality occurs. A monitoring system using the moving image conversion apparatus according to at least one of claims 1 to 3,
The monitoring system, wherein the selection means is a client terminal connected to a network. The data acquired by the image acquisition device capable of acquiring data including the first encoded data obtained by encoding the moving image by the first encoding method is responsive to the event trigger supplied under a predetermined condition from the trigger generation means. A moving image conversion method provided to an image reproducing apparatus capable of decoding an image reproduced by decoding the second encoded data encoded by the second encoding method,
An input step in which data including the first encoded data is input from the image acquisition device;
A separation step of separating the first encoded data from the input data;
A decoding step of decoding the separated first encoded data to generate a moving image;
A deformation step of performing a process of transforming the generated moving image into a moving image having a screen size or a frame rate corresponding to image reproduction of the image reproducing device;
An encoding step of generating the second encoded data by encoding the modified moving image using the second encoding method;
An output step of outputting the second encoded data to the image reproduction device in response to the input event trigger;
A moving image conversion method comprising: The data acquired by the image acquisition device capable of acquiring data including the first encoded data obtained by encoding the moving image by the first encoding method is responsive to the event trigger supplied under a predetermined condition from the trigger generation means. A computer program capable of realizing a moving image conversion method provided to an image reproduction device capable of reproducing an image by decoding the second encoded data encoded by the second encoding method,
An input function for inputting data including the first encoded data from the image acquisition device;
A separation function for separating the first encoded data from the input data;
A decoding function for generating a moving image by decoding the separated first encoded data;
A deformation function for performing processing for transforming the generated moving image into a moving image having a screen size or a frame rate corresponding to image reproduction of the image reproducing device;
An encoding function for generating the second encoded data by encoding the modified moving image using the second encoding method;
An output function for outputting the second encoded data to the image reproduction device in response to the input event trigger;
A program of a moving image conversion method characterized in that can be realized.

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