CN105072387A - Video recording method for video door bell and video door bell - Google Patents
Video recording method for video door bell and video door bell Download PDFInfo
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Abstract
The invention provides a video recording method for a video door bell and the video door bell. The video recording method for the video door bell comprises the steps of capturing images contained in video signals acquired by a camera, zooming out the captured images to a preset size, compressing the images in a preset compression format, storing the compressed images in a video data buffer area, and reading the images in the video data buffer area according to the time order of video data that are stored in the video data buffer area to a memory as video data. According to the technical scheme of the invention, the data volume of video data is reduced. Meanwhile, no NAND flash in an SD memory card or a chip is required for the storage of video data, while a serial NOR flash memory is adopted to store video data. Therefore, the storage space and the storage cost are saved. Meanwhile, the application field of the door bell video recording function is expanded.
Description
Technical field
The present invention relates to video recording field, particularly relate to a kind of kinescope method and video doorbell of video doorbell.
Background technology
At present, along with the raising of people's living standard, doorbell is also by early stage only have jingle bell to reply simple functions develops into that collection is visual gradually, intercommunication, warning etc. are multifunctional integrated smart machine, and wherein taking pictures to visitor or recording a video is exactly its common function.Compare with taking pictures, video recording can provide continuous dynamic menu, contains much information, and thus obtains extensive use.
In video doorbell, the hardware being responsible for data storage generally has serial Norflash memory, Nandflash memory and external SD storage card, and less hard disk makees memory.Wherein, serial Norflash memory is commonly used to storage program and low volume data, and Nandflash memory and the multiplex occasion large in data volume demand of SD storage card.Serial Norflash memory and Nandflash memory generally exist with chip form, and when dispatching from the factory, solidified welding is on PCB.Norflash Capacity Ratio Nandflash memory and SD storage card little, but have that volume is little, price is low, be easy to the advantages such as control.The inner reality of SD storage card also stores with Nandflash.
Video doorbell display screen size common are 7 cun, 10 cun etc., and 7 cun of screen resolutions are based on 800*480, and 10 cun of resolution are based on 1024*600.Traditional doorbell videotaping protocol dimension of picture generally cannot adjust, and size is identical with machine screen size or smaller in the horizontal direction.For 7 cun of 800*480 types, dimension of picture is generally 800*480 or 640*480.Photo exists on serial flash or SD storage card.Conventional visualization doorbell dimension of picture to be taken pictures way close to the video recording of screen display size, bring Video data amount large, the problem that memory space requirements is high, therefore, when only having serial Norflash memory there is no Nandflash memory and external SD storage card as memory, recording function cannot be realized.Therefore, the application scenarios of conventional method restriction recording function, also improves cost.
Summary of the invention
The embodiment of the present invention provides a kind of kinescope method and video doorbell of video doorbell, large for the Video data amount solving video doorbell recording, the problem that memory space requirements is high.
The embodiment of the present invention is by the following technical solutions:
The invention provides a kind of kinescope method of video doorbell, comprising:
Capture the picture in the vision signal obtained by camera;
The picture grabbed is narrowed down to pre-set dimension, is compressed into the picture of default compressed format;
By the picture after compression stored in Video data buffering area;
From described Video data buffering area, picture is read to memory as Video data by the time order and function order stored in Video data buffering area.
Preferably, before the picture in the vision signal that described crawl camera obtains, also comprise: obtain analog video signal by camera;
Picture in the vision signal that described crawl is obtained by camera, being comprised: capture the picture in the analog video signal obtained by camera.
Preferably, the picture in the vision signal that described crawl camera obtains, comprising: the frame synchronizing signal in the analog video signal that described camera obtains detected, then captures this frame picture in described analog video signal.
Preferably, the picture in the vision signal that described crawl camera obtains, comprising: periodically capture the picture in the vision signal obtained by camera; Described memory is serial Norflash memory.
Preferably, described in be compressed into the picture of default compressed format after, also comprise: according to the size of picture after compression and the internal memory of memory, the threshold value of Video data frame number is set;
Described by stored in Video data buffering area time order and function order from described Video data buffering area, read picture to memory as after Video data, also comprise, determine that in memory, the frame number of Video data rises to the threshold value of described Video data frame number, then stop reading picture to buffering area or the picture stopping capturing shooting figure shooting.
Present invention also offers a kind of video doorbell, comprising:
Handling module, for capturing the picture in the vision signal that obtained by camera;
Compression module, is connected with handling module, for the picture grabbed is narrowed down to pre-set dimension, is compressed into the picture of default compressed format;
Buffering area memory module, is connected with compression module, for by compression after picture stored in Video data buffering area;
Video recording memory module, is connected with video recording memory module, for reading picture to memory as Video data by the time order and function order stored in Video data buffering area from described Video data buffering area.
Preferably, also comprise vision signal acquisition module, be connected with handling module, for obtaining analog video signal by camera;
Described handling module, specifically for capturing the picture in the analog video signal that obtained by camera.
Preferably, described vision signal acquisition module, specifically for: the frame synchronizing signal in the analog video signal that described camera obtains detected, then capture this frame picture in described analog video signal.
Preferably, described handling module, specifically for: periodically capture the picture in the vision signal obtained by camera; Described memory is serial Norflash memory.
Preferably, also comprise:
Frame number threshold settings module, is connected with described compression module, for arranging the threshold value of Video data frame number according to the size of picture after compression and the internal memory of memory;
Frame number limiting module, is connected with video recording memory module, for determining that in memory, the frame number of Video data rises to the threshold value of described Video data frame number, then stops reading picture to buffering area or the picture stopping capturing shooting figure shooting.
Compared with prior art, the kinescope method of a kind of video doorbell of the present invention and video doorbell, there is following beneficial effect: the present invention is by capturing the picture in vision signal, minification also puts into Video data buffering area after compression, last sequential storage is Video data, reduce the data volume of Video data, need not insert in SD storage card or chip and store with Nandflash, serial Norflash memory can be used to store, save memory space and cost, widen the application of doorbell recording function.
Accompanying drawing explanation
Fig. 1 is the method flow diagram providing a kind of first embodiment of kinescope method of video doorbell of the present invention.
Fig. 2 is the method flow diagram of second embodiment of the kinescope method of a kind of video doorbell provided by the invention.
Fig. 3 is the structured flowchart of first embodiment of a kind of video doorbell provided by the invention.
Fig. 4 is the structured flowchart of second embodiment of a kind of video doorbell provided by the invention.
Embodiment
The technical problem solved for making the present invention, the technical scheme of employing and the technique effect that reaches are clearly, be described in further detail below in conjunction with the technical scheme of accompanying drawing to the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 shows the method flow diagram of kinescope method first embodiment of a kind of video doorbell provided by the invention.The kinescope method of a kind of video doorbell of the present embodiment performs primarily of video doorbell.Wherein, in the present embodiment, this video doorbell is the intelligent visual door bell with camera, processor, memory, and the method comprises the following steps:
11: capture the picture in the vision signal obtained by camera.
Concrete, capture the picture in the vision signal obtained by the camera of video doorbell, and stored in internal memory.Vision signal can be digital video signal or analog video signal.Picture in vision signal is the view data in vision signal.The vision signal that can obtain camera is carried out periodicity and is captured, and the general crawl cycle, for being less than 1/24 second, because human eye has visual persistence effect, makes human eye can see continuous print video.Can be stored in DDR (DoubleDataRate Double Data Rate synchronous DRAM) stored in internal memory.
12: the picture grabbed is narrowed down to pre-set dimension, be compressed into the picture of default compressed format.
Concrete, by the picture grabbed by narrowing down to pre-set dimension, the picture compression after reducing is become the picture of compressed format.Certainly, if dimension of picture meets default size, the picture of preset format directly can be become to picture compression, and without the need to first reducing.The picture be compressed in the picture of default compressed format is image data.Wherein, pre-set dimension is the pixel number of picture level and vertical direction, and general pre-set dimension self-definedly can be set to less size, as 360*200,256*256,800*600,800*480 etc.Compressed format can be jpeg format etc.
13: by the picture after compression stored in Video data buffering area.
Video data buffering area is the memory field of default fixed size, is used for the picture after depositing compression.
14: from Video data buffering area, read picture to memory as Video data by the time order and function order stored in Video data buffering area.
By the time order and function order stored in Video data buffering area, the picture first putting into Video data buffering area is first read memory, by after put into the picture of Video data buffering area after read memory, the picture putting into data buffer zone is read sequentially, stores in memory as one section of complete Video data by particular video formats arrangement.
Fig. 2 shows the method flow diagram of kinescope method second embodiment of a kind of video doorbell provided by the invention.The kinescope method of a kind of video doorbell of the present embodiment performs primarily of video doorbell.Wherein, in the present embodiment, this video doorbell is the intelligent visual door bell with camera, processor, memory, compared to kinescope method first embodiment of a kind of video doorbell, the mode obtaining vision signal is added in the present embodiment, frame number thresholding is set and determines that Video data frame number stops capturing image after exceeding thresholding, and further define the mode of capturing pictures.The method comprises the following steps:
21: obtain analog video signal by camera.
Concrete, the camera capture video of video doorbell, generate analog video signal, the form of analog video signal is PAL (PhaseAlterationLine) standard.
22: the frame synchronizing signal analog video signal that camera obtains being detected, then capture this frame picture in analog video signal.
Concrete, video grabber adopts automatic mode, when the frame synchronizing signal of every frame picture in the analog video signal that camera obtains being detected, then captures this frame picture in the analog video signal obtained by the camera of video doorbell, and stored in internal memory.Every frame field sync signal is a pulse signal, representing that a frame picture starts to transmit, by detecting the frame synchronizing signal capturing pictures of every frame picture in analog video signal, every frame picture can be grabbed more accurately, wherein pal mode is 25 frames per second, by this step crawl 25 per second frame picture.Wherein, the every frame picture in this step is the view data of the every frame in analog video signal.
23: the picture grabbed is narrowed down to pre-set dimension, be compressed into the picture of default compressed format.
Concrete, by the picture grabbed by narrowing down to pre-set dimension, the picture compression after reducing is become to preset the picture of compressed format.Certainly, if dimension of picture meets default size, the picture of preset format directly can be become to picture compression.Wherein, pre-set dimension is the pixel number of picture level and vertical direction, and general pre-set dimension self-definedly can be set to less size, as 360*200,256*256,800*600,800*480 etc.Compressed format can be jpeg format etc.
24: by the picture after this compression stored in Video data buffering area.
Concrete, judge that whether Video data buffering area is full, if so, then frame losing process is carried out to the picture after this compression, if not, by the picture after this compression stored in Video data buffering area.
Video data buffering area is the memory field of default fixed size, after picture compression well, need to judge that whether Video data buffering area is full, if so, then frame losing process is carried out to the picture after this compression, frame losing process, abandon by this picture, do not put into buffering area, if not, by the picture after this compression stored in Video data buffering area.
25: from Video data buffering area, read picture to memory as Video data by the time order and function order stored in Video data buffering area.
By stored in Video data buffering area time order and function order, the picture first putting into Video data buffering area is first read memory, by after put into the picture of Video data buffering area after read memory.As preferably, memory is serial Norflash memory, and the capacity of serial Norflash memory generally has 8MByte's and 16MByte.Picture in this step is the view data stored in buffering area.
26: determine that in memory, the frame number of Video data rises to the threshold value of Video data frame number, then stop reading picture to buffering area or the picture stopping capturing shooting figure shooting.
Preferably, after step 23, also comprise step 231 and step 232, step 231: the threshold value that Video data frame number is set according to the size of picture after compression and the internal memory of memory.Wherein there is no precedence relationship between step 231 and step 24, step 25.
Such as, memory is serial Norflash memory, and serial Norflash memory generally has 8MByte's and 16MByte.Adopt the compressed format that same size is same, the size of the picture obtained after compression (i.e. picture take internal memory) does not generally have too large change, therefore, the picture number that memory can store can be estimated according to the size of picture after compression, memory is divided into multiple storage area by the number of self-defined video recording, a storage area deposits a video recording, can obtain the frame number of the picture that can store in recording a video, using the threshold value of frame number as Video data frame number.
In step 26, when in memory, the frame number of Video data rises to the threshold value of Video data frame number, reading sequentially with the picture of threshold value same number of frames of data buffer zone will be put into, store in memory as one section of complete Video data by specific format arrangement, stop reading picture to buffering area or the picture stopping capturing shooting figure shooting, the application of reasonable disposition memory space can be carried out like this according to the memory size of memory, make full use of memory space, save cost.
The present embodiment is by carrying out compression process to picture, the dimension of picture that making records a video takes pictures is adjustable, solve the problem that the Implement of Video Doorbell recording function memory space requirements is high, by reducing dimension of picture, even if when only having serial Norflash memory to store, also recording function can be realized, and the stored number of capture pictures can be increased, adopt the method for the present embodiment, for the video doorbell that 7 cun of display resolutions are 800*480, when dimension of picture is set as 360*200, 5 sections can be stored at the serial Norflash memory of 16M, the video recording in every period of 10 seconds, or the photo of more than 200 can be stored, video doorbell application generally can be met.Therefore, the embodiment of the present invention also reduces cost while being video doorbell video recording camera function broaden application scope.
Fig. 3 shows the structured flowchart of a kind of video doorbell first embodiment provided by the invention.A kind of video doorbell of the present embodiment is the video doorbell with camera, processor and memory.Wherein, this video doorbell comprises handling module 31, compression module 32, buffering area memory module 33 and video recording memory module 34.
Handling module 31, is connected with compression module 32, for capturing the picture in the vision signal that obtained by camera.
Concrete, capture the picture in the vision signal obtained by the camera of video doorbell, and stored in internal memory.Vision signal can be digital video signal or analog video signal.Picture in vision signal is the view data in vision signal.The vision signal that can obtain camera is carried out periodicity and is captured, and the general crawl cycle, for being less than 1/24 second, because human eye has visual persistence effect, makes human eye can see continuous print video.Can be stored in DDR (DoubleDataRate Double Data Rate synchronous DRAM) stored in internal memory.
Compression module 32, is connected with buffering area memory module 33, for the picture grabbed is narrowed down to pre-set dimension, is compressed into the picture of default compressed format.
Concrete, by the picture grabbed by narrowing down to pre-set dimension, the picture compression after reducing is become the picture of compressed format.Certainly, if dimension of picture meets default size, the picture of preset format directly can be become to picture compression, and without the need to first reducing.The picture be compressed in the picture of default compressed format is image data.Wherein, pre-set dimension is the pixel number of picture level and vertical direction, and general pre-set dimension self-definedly can be set to less size, as 360*200,256*256,800*600,800*480 etc.Compressed format can be jpeg format etc.
Buffering area memory module 33, with video recording memory module 34 be connected, for by compress after picture stored in Video data buffering area.
Video data buffering area is the memory field of default fixed size, is used for the picture after depositing compression.
Video recording memory module 34, for reading picture to memory as Video data by the time order and function order stored in Video data buffering area from Video data buffering area.
By the time order and function order stored in Video data buffering area, the picture first putting into Video data buffering area is first read memory, by after put into the picture of Video data buffering area after read memory, the picture putting into data buffer zone is read sequentially, stores in memory as one section of complete Video data by particular video formats arrangement.
Fig. 4 shows the structured flowchart of a kind of video doorbell provided by the invention second embodiment.A kind of video doorbell of the present embodiment is the video doorbell with camera, processor and memory.Wherein, this video doorbell comprises vision signal acquisition module 41, handling module 42, compression module 43, buffering area memory module 44, video recording memory module 45, frame number threshold settings module 46 and frame number threshold settings module 47.
Vision signal acquisition module 41, for obtaining analog video signal by camera.
Concrete, the camera capture video of video doorbell or continuous capture pictures, generate analog video signal, the form of analog video signal is pal mode etc.
Handling module 42, is connected with vision signal acquisition module 41, for the frame synchronizing signal of the analog video signal that camera obtains being detected, then captures this frame picture in analog video signal.
Concrete, video grabber adopts automatic mode, when the frame synchronizing signal of every frame picture in the analog video signal that camera obtains being detected, then captures this frame picture in the analog video signal obtained by the camera of video doorbell, and stored in internal memory.Every frame field sync signal is a pulse signal, representing that a frame picture starts to transmit, by detecting the frame synchronizing signal capturing pictures of every frame picture in analog video signal, every frame picture can be grabbed more accurately, wherein pal mode is 25 frames per second, by this step crawl 25 per second frame picture.Wherein, the every frame picture in this step is the view data of the every frame in analog video signal.
Compression module 43, is connected with handling module 42, for the picture grabbed is narrowed down to pre-set dimension, is compressed into the picture of default compressed format.
Concrete, by the picture grabbed by narrowing down to pre-set dimension, the picture compression after reducing is become the picture of compressed format.Certainly, if dimension of picture meets default size, the picture of preset format directly can be become to picture compression.Wherein, pre-set dimension is the pixel number of picture level and vertical direction, and general pre-set dimension self-definedly can be set to less size, as 360*200,256*256,800*600,800*480 etc.Compressed format can be jpeg format etc.
Buffering area memory module 44, is connected with compression module 43, for by the picture after this compression stored in Video data buffering area.
Concrete, judge that whether Video data buffering area is full, if so, then frame losing process is carried out to the picture after this compression, if not, by the picture after this compression stored in Video data buffering area.
Video data buffering area is the memory field of default fixed size, after picture compression well, need to judge that whether Video data buffering area is full, if so, then frame losing process is carried out to the picture after this compression, frame losing process, abandon by this picture, do not put into buffering area, if not, by the picture after this compression stored in Video data buffering area.
Video recording memory module 45, is connected with buffering area memory module 44, for reading picture to memory as Video data by the time order and function order stored in Video data buffering area from Video data buffering area.
By stored in Video data buffering area time order and function order, the picture first putting into Video data buffering area is first read memory, by after put into the picture of Video data buffering area after read memory.As preferably, memory is serial Norflash memory, and the capacity of serial Norflash memory generally has 8MByte's and 16MByte.Picture in this step is the view data stored in buffering area.
Frame number limiting module 47, is connected with video recording memory module 45, for determining that in memory, the frame number of Video data rises to the threshold value of Video data frame number, then stops reading picture to buffering area or the picture stopping capturing shooting figure shooting.
Preferably, comprise frame number threshold settings module 46, be connected with compression module 43, for arranging the threshold value of Video data frame number according to the size of picture after compression and the size of memory.
Such as, memory is serial Norflash memory, and serial Norflash memory generally has 8MByte's and 16MByte.Adopt the compressed format that same size is same, the size of the picture obtained after compression (i.e. picture take internal memory) does not generally have too large change, therefore, the picture number that memory can store can be estimated according to the size of picture after compression, memory is divided into multiple storage area by the number of self-defined video recording, a storage area deposits a video recording, can obtain the frame number of the picture that can store in recording a video, using the threshold value of frame number as Video data frame number.
In frame number limiting module 47, when in memory, the frame number of Video data rises to the threshold value of Video data frame number, reading sequentially with the picture of threshold value same number of frames of data buffer zone will be put into, store in memory as one section of complete Video data by specific format arrangement, stop reading picture to buffering area or the picture stopping capturing shooting figure shooting, the application of reasonable disposition memory space can be carried out like this according to the memory size of memory, make full use of memory space, save cost.
The present embodiment is by carrying out compression process to picture, the dimension of picture that making records a video takes pictures is adjustable, solve the problem that the Implement of Video Doorbell recording function memory space requirements is high, by reducing dimension of picture, even if when only having serial Norflash memory to store, also recording function can be realized, and the stored number of capture pictures can be increased, adopt the method for this case, for the video doorbell that 7 cun of display resolutions are 800*480, when dimension of picture is set as 360*200, the serial Norflash memory that can be 16MByte at capacity can store 5 sections, the video recording in every period of 10 seconds, or the photo of more than 200 can be stored, video doorbell application generally can be met.Therefore, the embodiment of the present invention also reduces cost while being video doorbell video recording camera function broaden application scope.
In sum, present invention decreases the data volume of Video data, need not insert in SD storage card or chip and store with Nandflash, serial Norflash memory can be used to store, save memory space and cost, widen the application of doorbell recording function.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. a kinescope method for video doorbell, is characterized in that, comprising:
Capture the picture in the vision signal obtained by camera;
The picture grabbed is narrowed down to pre-set dimension, is compressed into the picture of default compressed format;
By the picture after compression stored in Video data buffering area;
From described Video data buffering area, picture is read to memory as Video data by the time order and function order stored in Video data buffering area.
2. the method for claim 1, is characterized in that, before the picture in the vision signal that described crawl camera obtains, also comprises: obtain analog video signal by camera;
Picture in the vision signal that described crawl is obtained by camera, being comprised: capture the picture in the analog video signal obtained by camera.
3. method as claimed in claim 2, it is characterized in that, picture in the vision signal that described crawl camera obtains, comprising: the frame synchronizing signal in the analog video signal that described camera obtains detected, then captures this frame picture in described analog video signal.
4. the method for claim 1, is characterized in that, the picture in the vision signal that described crawl camera obtains, comprising: periodically capture the picture in the vision signal obtained by camera; Described memory is serial Norflash memory.
5. the method for claim 1, is characterized in that, described in be compressed into the picture of default compressed format after, also comprise: according to the size of picture after compression and the internal memory of memory, the threshold value of Video data frame number is set;
Described by stored in Video data buffering area time order and function order from described Video data buffering area, read picture to memory as after Video data, also comprise, determine that in memory, the frame number of Video data rises to the threshold value of described Video data frame number, then stop reading picture to buffering area or the picture stopping capturing shooting figure shooting.
6. a video doorbell, is characterized in that, comprising:
Handling module, for capturing the picture in the vision signal that obtained by camera;
Compression module, is connected with handling module, for the picture grabbed is narrowed down to pre-set dimension, is compressed into the picture of default compressed format;
Buffering area memory module, is connected with compression module, for by compression after picture stored in Video data buffering area;
Video recording memory module, is connected with video recording memory module, for reading picture to memory as Video data by the time order and function order stored in Video data buffering area from described Video data buffering area.
7. video doorbell as claimed in claim 6, is characterized in that, also comprise vision signal acquisition module, be connected with handling module, for obtaining analog video signal by camera;
Described handling module, specifically for capturing the picture in the analog video signal that obtained by camera.
8. video doorbell as claimed in claim 6, is characterized in that, described vision signal acquisition module, specifically for: the frame synchronizing signal in the analog video signal that described camera obtains detected, then capture this frame picture in described analog video signal.
9. video doorbell as claimed in claim 6, is characterized in that, described handling module, specifically for: periodically capture the picture in the vision signal obtained by camera; Described memory is serial Norflash memory.
10. video doorbell as claimed in claim 6, is characterized in that, also comprise:
Frame number threshold settings module, is connected with described compression module, for arranging the threshold value of Video data frame number according to the size of picture after compression and the internal memory of memory;
Frame number limiting module, is connected with video recording memory module, for determining that in memory, the frame number of Video data rises to the threshold value of described Video data frame number, then stops reading picture to buffering area or the picture stopping capturing shooting figure shooting.
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| CN108965831A (en) * | 2018-09-05 | 2018-12-07 | 北京疯景科技有限公司 | Method for processing video frequency, device and intelligent visual door bell |
| CN110121074A (en) * | 2019-04-25 | 2019-08-13 | 西安空间无线电技术研究所 | A kind of big compression method of satellite image of performance precognition |
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Application publication date: 20151118 |