CN104252414B - By the method and its device of image write-in memory - Google Patents
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- CN104252414B CN104252414B CN201310256007.5A CN201310256007A CN104252414B CN 104252414 B CN104252414 B CN 104252414B CN 201310256007 A CN201310256007 A CN 201310256007A CN 104252414 B CN104252414 B CN 104252414B
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Abstract
The present invention provides a kind of method that image is write to memory, and this method comprises the steps of：One first resolution according to one first image establishes one first allocation list, and the memory is planned to multiple first buffering areas by it；One second resolution according to one second image establishes one second allocation list, and the memory is planned to multiple second buffering areas by it, and second resolution is different from first resolution；And determine that second image writes the position of the memory according to first allocation list and second allocation list.
Description
Technical field
The present invention is relevant with a kind of method that image is write to memory, and being applied in particular to one kind will be audio-visual
The method of the image write-in memory of crossfire.
Background technology
With the development of world-wide web and Radio Transmission Technology, a kind of network that video stream turns into emerging in recent years is more
Broadcasting media mode.Video stream is after multimedia document is encoded, from transmitting terminal by world-wide web or wireless biography
Defeated mode is sent to receiving terminal, downloaded by receiving terminal, decode after play out.Video stream is characterised by, without will be more
The whole part of media article is stored in receiving terminal after downloading, but is entered using the storage buffer multimedia document that just part has received
Row storage and processing, and after the part multimedia, the space of storage buffer is directly disengaged, for subsequent download
Multimedia document uses.
However, the video stream that the resolution provided for transmitting terminal is higher, because archive content is larger, sometimes can
Due to network bandwidth deficiency or strong and weak unstable of wireless transmission signal, cause receiving terminal to receive the speed of data and do not catch up with and broadcast
Speed is put, therefore causes to play and interrupts, influences user's experience.It is according to frequency range or transmission to this caused settling mode
Speed determines the resolution of image in transmitted multimedia document, that is to say, that through the mode for sacrificing image analytic degree,
It is set still to be able to the content of unbroken broadcasting video stream in frequency range deficiency or slower transmission speed.
In implementation, transmitting terminal can determine the image analytic degree of output according to existing network frequency range or transmission speed dynamic, when
When detecting that frequency range is wider or transmission speed is very fast, the video stream of transmitting terminal transmission tool higher resolution image, conversely, working as
When detecting that frequency range is narrower or transmission speed is slower, then transmitting terminal transmission has the video stream of relatively low analytical-density image.
Specifically, when receiving terminal one audiovisual materials of reception, de-multiplexer can be passed through first by image data area therein
Branch away, and then the resolution of its image is obtained from the information that package shelves head is included in the image data, then by a storage
Device is divided into multiple buffering area according to the resolution, and decoded image is respectively written into these buffering areas, finally then foundation
The temporal information that image in these buffering areas is included, sequentially read these images and transferred to.Wherein, when the solution of image
Analysis degree is changed, then the image analytic degree acquired by multiplexing is solved after client downloads and is changed, now needs first to deposit this
Reservoir is reclassified as multiple buffering area according to the resolution after the change, could be by the decoded shadow using different resolutions
As being respectively written into these buffering areas repartitioned.
Fig. 1 is refer to, its depicted flow chart that image is write to memory for known technology.
When a client receive a video stream and carry out solve multiplexing distinguish image data therein after, walked first
Rapid S100, the first resolution according to image included in these image datas establish the first allocation list.First allocation list is to close
Configured in the use of memory, the memory is planned to multiple first buffering areas by it, then can foundation when then continuing playing video
The information recorded in first allocation list, go to read the image in memory to play out.
What it is due to reception is video stream, therefore actually receiving terminal will constantly receive new image.In step S120
In, image is received from video stream, the image may change due to network bandwidth or the wireless speed for passing speed, and employ not
Same resolution.
Therefore, whether step S140 judges the resolution of the image still for the first parsing according to the information in video stream
Degree.When the resolution of image is still the first resolution, then image write-in, is somebody's turn to do by progress step S185 according to first allocation list
Memory；When the resolution of the image is the second resolution, then progress step S160, first is re-established according to the second resolution
Allocation list, and step S180 is carried out, the image is write into memory according to the first allocation list re-established.
The method that image is write to memory from above-mentioned known technology, when the resolution of the image of reception is solved by first
When analysis degree is changed into the second resolution, in order to which the image of the second resolution is write into memory, it is necessary to through step S160 according to the
Two resolutions re-establish first allocation list.Although now remaining the image not being read in memory, due to this
One allocation list equally abandons the information of these images not being read, therefore just certainly can not should when playing by re-establishing
First allocation list reads the information of these images not being read, thus will skip these images not being read, and is only capable of
It is substituted with black picture.That is, in known technology when image analytic degree changes, the broadcasting of picture will have one to
Several images are presented with black picture, and are unable to reach seamless switching, and then influence user's impression.
The content of the invention
In view of this, it is an object of the present invention to propose a kind of method and its device that image is write to memory, avoid
The situation of seamless switching is unable to reach in known technology when image analytic degree changes.
In order to achieve the above object, according to a scheme proposed by the present invention, a kind of side that image is write to memory is proposed
Method, include step：One first resolution according to one first image establishes one first allocation list, and first allocation list relates to
The use configuration of the memory, the memory is planned to multiple first buffering areas by it；One second solution according to one second image
Analysis degree establishes one second allocation list, and second allocation list relates to the use configuration of the memory, and it plans the memory
For multiple second buffering areas, and second resolution is different from first resolution；And according to first allocation list and this
Two allocation lists determine that second image writes the position of the memory.
In order to achieve the above object, according to another program proposed by the present invention, there is provided a kind of that image is write into memory
Device, comprising：One planning unit, one first resolution according to one first image establish one first allocation list, and according to one the
One second resolution of two images establishes one second allocation list, and first allocation list relates to the use configuration of the memory,
The memory is planned to multiple first buffering areas by it, and second allocation list relates to the use configuration of the memory, and it will
The memory is planned to multiple second buffering areas, and second resolution is different from first resolution；And one buffering area match somebody with somebody
Unit is put, determines that second image writes the position of the memory according to first allocation list and second allocation list.
Brief description of the drawings
For the above objects, features and advantages of the present invention can be become apparent, the tool below in conjunction with accompanying drawing to the present invention
Body embodiment elaborates, wherein：
The depicted flow charts that image is write to memory for known technology of Fig. 1.
The flow chart of one embodiment of the depicted methods that image is write to memory for the present invention of Fig. 2.
The schematic diagram of the depicted embodiments that image is write to memory for the present invention of Fig. 3.
The flow chart of the depicted another embodiments that image is write to memory for the present invention of Fig. 4.
Fig. 5 is depicted to write side of the device of memory applied to an embodiment of a playing device for the present invention by image
Block figure.
Label declaration：
500：Decoder
522：Buffer configuration unit
524：Planning unit
526：Position determining means
540：Static RAM
542：Second allocation list
544：First allocation list
560：Dynamic random access memory
580：Image output unit
Embodiment
Fig. 2 is refer to, the flow chart of an embodiment of its depicted method that image is write to memory for the present invention.
When receiving terminal receive video stream and carry out solve multiplexing distinguish image data therein after, carry out step first
S200, the first resolution according to image included in the image data establish the first allocation list.First allocation list relates to
The use configuration of memory, memory is planned to multiple first buffering areas by it, and these first buffering areas are according to the first resolution
Planned, the size of each first buffering area is enough the image for writing first resolution of tool.
When receiving terminal persistently receives the image of the first resolution of tool, these images are to be written into deposit according to the first allocation list
These first buffering areas of reservoir.Meanwhile the first buffering area that each image is write is recorded in the first allocation list.This means,
Each image position stored in memory is record in first allocation list.Subsequently image is carried out by being read in memory
During broadcasting, then it can go to read the image in memory according to the information recorded in first allocation list.
Meanwhile record which image had been read in the first allocation list.What it is due to reception is video stream, therefore actual
Upper receiving terminal will constantly receive new image, in step S210, receive image, image may be due to network bandwidth or nothing
The speed that line passes speed changes, and uses different resolutions.
In step S220, judge whether the resolution of image is the first resolution according to the information in video stream, when new
The resolution for increasing image is the first resolution, then carries out step S265, and increasing this newly image write-in according to first allocation list should
The first buffering area of memory；When the resolution of newly-increased image is the second resolution, then progress step S230, is parsed according to second
Degree establishes one second allocation list.
Second allocation list relates to the use configuration of memory, and memory is planned to multiple second buffering areas by it, this
A little buffering areas are planned according to the second resolution, and its size is enough the image for writing the second resolution of tool.Second allocation list
And record the second buffering area that is write of image of the second resolution of each tool and subsequent reads can then match somebody with somebody according to second when taking image
The information recorded in table is put, reads the image in memory, and the image being read in the second allocation list record.
What it is due to reception is video stream, therefore actually the receiving terminal will constantly receive new image, in step
In S240, second buffering area is selected according to second allocation list, and carries out step S250, checks first allocation list, confirming should
Position where second buffering area whether there is the first analytical-density image not yet read, if in the absence of the first solution not yet read
Analysis degree image, then carry out step S260 and increase this newly image write-in selected second buffering area；If in the presence of first not yet transferred to
Analytical-density image, then repeat step S240, another second buffering area is selected according to second allocation list.
Fig. 3 is refer to, the schematic diagram of an embodiment of its depicted method that image is write to memory for the present invention.
Because video stream is encoded archives, it is not in accordance with the order of follow-up play by shadow when decoding image
Come as decoding, by taking the present embodiment as an example, the order for decoding image is sequentially the 3rd image, the 2nd image, the 0th image, the 1st shadow
Picture, the 7th image, the 6th image, the 4th image and the 5th image.Wherein these images all have respective temporal information, and it is broadcast
The order put is followed successively by the 0th image, the image of the 1st image ... the 6th, the 7th image.Wherein the 3rd image, the 2nd image, the 0th image, with
And the 1st image be the first resolution, and the 7th image, the 6th image, the 4th image and the 5th image are the second resolution.
During state 300, memory divides into 8 first buffering areas by the first allocation list according to the first resolution, and will solution
The 3rd image write-in wherein first buffering area that code goes out.In 310~state of state 330, it will sequentially be decoded according to the first allocation list
The 2nd image, the 0th image and the 1st image write-in first buffering area gone out.In state 340, the 0th image is read from memory
After play out, therefore be designated as having read and (not being shown in Fig. 3) in the first allocation list internal standard, and its used first buffering
Qu Ze is released to be used for other images, and the 7th image analytic degree now decoded is changed into the second resolution, therefore is deposited
Reservoir divides into 5 second buffering areas by one second allocation list according to the second resolution, and the 7th image decoded is write into it
In a second buffering area.
It is worth noting that, now the first allocation list is not updated or removed.Therefore, the 7th image write-in memory
When, also need to confirm to be intended to write the memory location corresponding to the second buffering area of the 7th image according to first allocation list, if still
There is the image (being denoted as site) for the first resolution not being read, if so, must then select other second buffering areas.State
In 350~state 370, after the 1st image, the 2nd image and the 3rd image are sequentially read, it is denoted as in the first allocation list
Read, the 6th image, the 4th image and the 5th image then sequentially according to the second allocation list write the memory these second
Buffering area.In state 370, because image all in the first allocation list is all to have read, therefore first allocation list is deleted.
In previous embodiment, the first allocation list is all configured with the second allocation list for whole memory, such as first
Whole memory is averagely allocated to multiple first buffering areas, the size parsing of write-in one first enough of each buffering area by allocation list
Spend image；Similarly, whole memory is averagely allocated to multiple second buffering areas, the size foot of each buffering area by the second allocation list
Enough write one second analytical-density image.
In another embodiment, the first allocation list is that the Part I for being directed to memory is configured.Second allocation list is then
Configured for the Part II of the memory, Part I can be parts different in memory from Part II, also
It can overlap, wherein, Part I is more than Part II.
For example, when the first resolution is more than a predetermined critical, the first allocation list divides whole memory space
With for multiple first buffering areas；When the image newly received is changed into the second resolution, if finding, the second resolution is less than the first solution
Analysis degree, and be less than predetermined critical, then the part of memory only can be planned to multiple second buffering areas, to retain a part
Storage space.Consequently, it is possible to when again subsequently received image changes back to the first analytical-density image or other big resolution shadows
During picture, writable the retained storage space of image that newly receives, to ensure that memory has sufficiently large continuous sky at any time
Between store big analytical-density image.
In a preferred embodiment, after the first allocation list corresponding to the first analytical-density image and foundation is received, connect
The first analytical-density image received is sequentially to be written into memory in the first direction from the side of memory；And work as and receive second
After second allocation list corresponding to analytical-density image and foundation, received second analytical-density image is the opposite side edge from memory
Second direction is sequentially written into memory, consequently, it is possible to when the resolution for newly receiving image changes, this practice can be improved and deposited
There is the chance in enough continuously available spaces in reservoir, newly image is received with storage.
In addition, being directed to same analytical-density image, the present embodiment have recorded each image write-in storage in same allocation list
The configuration of device, and the temporal information that these images are included, the temporal information can be that various forms such as plays time stamp
(presentation time stamp, referred to as PTS) or image sequence number (picture order count, referred to as
POC) etc., therefore subsequently when reading image, you can the image to be read is determined according to this, and reads the shadow from correct position according to this
Picture.It is worth noting that, being directed to same analytical-density image, each image is have recorded in same allocation list alleged by the present embodiment writes
Enter the configuration of memory, and the temporal information that these images are included, be can record in its implementation in same place, also can be in not
Same place records respectively.
Fig. 4 is refer to, the flow chart of another embodiment of its depicted method that image is write to memory for the present invention.
When receiving terminal receive a video stream and carry out solve multiplexing distinguish image data therein after, carry out step first
S400, one first resolution according to image included in the image data establish one first allocation list, and first allocation list is
The use configuration of a memory is related to, the memory is planned to multiple first buffering areas by it, and records these the first bufferings
Whether area has been written into image, and whether these images having been written into have been read.During follow-up play image, then can according to this
The information recorded in one allocation list, the image in memory is sequentially read to play out.
Then step S410 is carried out, receives an image, the image may be due to network bandwidth or the wireless speed for passing speed
Change, and use different resolutions.In step S420, according to the information in video stream judge image resolution whether be still
First resolution, when the resolution of image is still the first resolution, then step S445 is carried out, conversely, when the resolution of image is
Second resolution, then carry out step S430.
Step S445 is to read the temporal information corresponding to the image, wherein, temporal information is the time shown with image
It is relevant.Then step S475 is carried out, image is write to the first of memory according to the temporal information of image and the first allocation list
Buffering area.
When other images of multiple the first resolutions being not yet read in memory be present, then taken from the first allocation list
The temporal information of these other images is obtained to be compared, to select appropriate first buffering area according to this, to write image.It is selected
The principle selected is, by the image storage with similar temporal information in close or adjacent first buffering area.
For example, selection and other images of temporal information corresponding to corresponding temporal information closest to image, and will
Image writes the next door for the first buffering area that other images are write or neighbouring first buffering area.What if other images were write
All there is the image being not yet read in the next door of first buffering area or neighbouring first buffering area, then temporal information corresponding to selection
Other images of temporal information corresponding to second close to image, and image is write into the first buffering area that other images are write
Next door or neighbouring first buffering area.
Step 430 is to establish the second allocation list according to the second resolution, and the second allocation list relates to the use of memory
Configuration, memory is planned to multiple second buffering areas by it, and records whether these second buffering areas have been written into image, and this
Whether the image having been written into a bit has been read.During follow-up play image, then it can go to read according to the information recorded in the second allocation list
Image in access to memory plays out.In step S440, the temporal information corresponding to image is read, wherein, temporal information
It is relevant with the time that image is transferred to.
Then step S450 is carried out, according to the temporal information of image and the second allocation list selection second buffering area.When depositing
When reservoir has other images of multiple the second resolutions being not yet read, then these other shadows are obtained through the second allocation list
The temporal information of picture to be compared, and according to this selection corresponding to temporal information corresponding to temporal information closest to image other
Image, and the image is write into the next door for the second buffering area that other images are write or neighbouring second buffering area.
Not yet it is read if the next door for the second buffering area that other images are write or neighbouring second buffering area are all present
Image, then temporal information corresponding to selection is other images of temporal information corresponding to second close to image, and image is write
Enter the next door for the first buffering area that other images are write or neighbouring second buffering area.
In step S460, according to the first allocation list, the position where confirming second buffering area whether there is what is not yet transferred to
First analytical-density image.If in the absence of the first analytical-density image not yet transferred to, carry out step S470 and write newly-increased image
Second buffering area；If in the presence of the first analytical-density image not yet transferred to, repeat step S460, the time according to image believes
Breath and the second allocation list select another second buffering area.
According to the present embodiment, because image similar in corresponding temporal information can be written into similar buffering area, therefore work as
During playing video, the image in these similar buffering areas can be continuously read, thus be easier to vacate larger continuous available
Space.Furthermore when image analytic degree changes, when being especially converted into larger resolution, then it is easier to find available
Space writes image.
Fig. 5 is refer to, its depicted implementation of device applied to playing device that image is write to memory for the present invention
The block diagram of example.Device for writing into memory includes planning unit 524, buffer configuration unit 522.Planning unit 524 is entering
Row step S400, the first allocation list 544 is established according to the first resolution, and carry out step S430, built according to the second resolution
Vertical second allocation list 542.
First allocation list 544 relates to the use configuration of memory 560, and memory 560 is planned to multiple first by it
Buffering area, and record whether these first buffering areas have been written into image, and whether these images having been written into have been read.
Second allocation list 542 relates to the use configuration of memory 560, and memory 560 is planned to multiple second by it
Buffering area, and record whether these first buffering areas have been written into image, and whether these images having been written into have been read.
Planning unit 524 simultaneously performs step S420, and the resolution of the newly-increased image is judged according to the information in video stream
The first resolution whether is still used, and performs step S440 and step S445, reads the temporal information that image is included, its
In, the time that temporal information is with image is transferred to is relevant.
The buffer configuration unit 522 be receive planning unit 524 analysis result, according to image temporal information and
First allocation list 544 determines, by the first buffering area of image write-in memory 560, finally and to send configuration result to decoder
500。
Buffer configuration unit 522 more carries out step S450 according to the analysis result of the planning unit 524, according to image
Temporal information and the second allocation list 542 determine second buffering area, and perform step S460 and confirm the according to the first allocation list 544
Two buffering areas whether there is the first analytical-density image not yet played, finally and send determination result to decoder 500.
To perform step S410, reception image is decoded decoder 500, and performs step S470 and step S475,
The image is write memory 560 by the configuration result according to the transmission of buffer configuration unit 522.Wherein, image may be due to net
Network frequency range or the speed being wirelessly transferred change, and use different resolutions.
Image output unit 580 transmits requirement instruction to position determining means 526 when playing video.Position determining means
After 526 receive requirement instruction, then the time letter according to these images recorded in the first allocation list 544 and the second allocation list 542
Breath, determines the image that should be read from memory 560, and image output unit 580 reads image in memory 560 simultaneously according to this
Exported.
In an embodiment of the present invention, the foregoing allocation list 542 of first allocation list 544 and second is deposited through static random
Access to memory 540 carrys out implementation.In an embodiment of the present invention, aforementioned memory 560 is come through dynamic random access memory
Implementation.In addition, dynamic random access memory 560 can also use the storage of other patterns with static RAM 540
Cryopreservation device carrys out implementation.
In addition, in an embodiment of the present invention, buffer configuration unit 522, planning unit 524 and position determine single
Member 526 can be realized by central processing unit through software program is performed.
From described above, when image is write memory by the present invention, it is first depending on the first resolution and establishes one first
Allocation list 544, is then checked whether the resolution of the image of reception is adopted by being converted to using the first resolution by planning unit 524
With the second resolution.When image analytic degree is converted to using the second resolution, then one second allocation list 542 is additionally set up, and
Retain the first allocation list 544.
That is, the data in the first allocation list 544 will not be deleted, therefore buffer configuration unit 522 is determining
, can be with reference to the first allocation list 544 and the second allocation list 524, without missing still when image inserts the position of memory
The first analytical-density image not played.When also therefore, using the present invention, it can't produce and one or more images are substituted with black picture
Situation, reach the purpose of the image of seamless switching difference resolution.
Although the present invention is disclosed as above with preferred embodiment, so it is not limited to the present invention, any this area skill
Art personnel, without departing from the spirit and scope of the present invention, when a little modification and perfect, therefore the protection model of the present invention can be made
Enclose to work as and be defined by what claims were defined.
Claims (11)
1. a kind of method that image is write to a memory, this method include step：
A. one first resolution according to one first image establishes one first allocation list, and first allocation list relates to the storage
The use configuration of device, the memory is planned to multiple first buffering areas by it；Every one first buffering of the plurality of first buffering area
The size in area corresponds to first resolution；Wherein, first allocation list records whether the plurality of first buffering area has been written into shadow
Whether picture, and the image of the plurality of first buffering area write-in have been read；
B. one second resolution according to one second image establishes one second allocation list, and second allocation list relates to the storage
The use configuration of device, the memory is planned to multiple second buffering areas by it, and second resolution is different from first parsing
Degree；The size of each second buffering area of the plurality of second buffering area corresponds to second resolution；And
C. determine that second image writes the position of the memory according to first allocation list and second allocation list；
Wherein step c is comprised the steps of：
According to second allocation list second buffering area is selected from the memory；
Judge that the selected second buffering area whether there is the image being not yet read according to first allocation list, when selected should
When the image being not yet read is not present in second buffering area, second image is write to the selected second buffering area；And
When the selected second buffering area has the image being not yet read, selected according to second allocation list from the memory
Another second buffering area.
2. the method as described in claim 1, it is characterised in that first allocation list is to be deposited according to first resolution for this
One Part I of reservoir is configured, and second allocation list be according to second resolution for the memory one the
Two parts are configured, wherein, the Part I is more than the Part II.
3. the method as described in claim 1, it is characterised in that first image is according to first allocation list and first shadow
As corresponding temporal information determines that it writes the position of the memory.
4. method as claimed in claim 3, it is characterised in that when with the presence of other images memory, according to this first
The temporal information that allocation list is included with first image determines that the step of first image writes the position of the memory includes：
According to the relation between the temporal information corresponding to first image and the temporal information corresponding to other images, determining should
First image writes the position of the memory.
5. the method as described in claim 1, it is characterised in that second image be according to first allocation list, this second matches somebody with somebody
Put table and the temporal information corresponding to second image determines that it writes the position of the memory.
6. a kind of device that image is write to a memory, the device include：
One planning unit, one first resolution according to one first image establish one first allocation list, and according to one second image
One second resolution establish one second allocation list, first allocation list relate to the memory use configuration, it should
Memory is planned to multiple first buffering areas, and second allocation list relates to the use configuration of the memory, and it stores this
Device is planned to multiple second buffering areas, and second resolution is different from first resolution；Wherein, first allocation list records
Whether the plurality of first buffering area has been written into image, and whether the image of the plurality of first buffering area write-in has been read；With
And
One buffer configuration unit, determine that second image writes the memory according to first allocation list and second allocation list
Position；
Wherein, the size of each first buffering area of the plurality of first buffering area corresponds to first resolution；The plurality of second
The size of each second buffering area of buffering area corresponds to second resolution；
Wherein, the buffer configuration unit selects a second buffering area according to second allocation list from the memory, and according to this
First allocation list judges that the selected second buffering area whether there is the image being not yet read, when the second buffering area is not present
During the image being not yet read, second image is write to the selected second buffering area；And when selected second buffering
When area has the image being not yet read, another second buffering area is selected from the memory according to second allocation list.
7. device as claimed in claim 6, it is characterised in that first allocation list is to be deposited according to first resolution for this
One Part I of reservoir is configured, and second allocation list be according to second resolution for the memory one the
Two parts are configured, wherein, the Part I is more than the Part II.
8. device as claimed in claim 6, it is characterised in that the buffer configuration unit is with being somebody's turn to do according to first allocation list
Temporal information corresponding to first image determines that first image writes the position of the memory.
9. device as claimed in claim 8, it is characterised in that, should when first buffering area the plurality of with the presence of other images
Buffer configuration unit is according between the temporal information corresponding to first image and the temporal information corresponding to other images
Relation, determine that first image writes the position of the memory.
10. device as claimed in claim 6, it is characterised in that the buffer configuration unit according to first allocation list, this
Temporal information corresponding to two allocation lists and second image determines that second image writes the position of the memory.
11. device as claimed in claim 6, it is characterised in that the planning unit and the buffer configuration unit are to pass through software
Carry out implementation.
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469240A (en) * | 2002-07-16 | 2004-01-21 | System and method for providing intermediate target in graphic system | |
| CN101076112A (en) * | 2006-05-17 | 2007-11-21 | 富士施乐株式会社 | Monitoring-image transmission device, monitoring-image transmission method, and computer readable medium |
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| CN104252414A (en) | 2014-12-31 |
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