CN106779008A - SD card, video camera and SD card reliability early warning system - Google Patents
SD card, video camera and SD card reliability early warning system Download PDFInfo
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- CN106779008A CN106779008A CN201510817955.0A CN201510817955A CN106779008A CN 106779008 A CN106779008 A CN 106779008A CN 201510817955 A CN201510817955 A CN 201510817955A CN 106779008 A CN106779008 A CN 106779008A
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- 230000015654 memory Effects 0.000 claims abstract description 64
- 238000012545 processing Methods 0.000 claims abstract description 12
- 230000003862 health status Effects 0.000 claims abstract description 10
- 230000003321 amplification Effects 0.000 claims description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 14
- 238000013500 data storage Methods 0.000 claims description 5
- 241000208340 Araliaceae Species 0.000 claims description 4
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 4
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 4
- 235000008434 ginseng Nutrition 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 21
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0722—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips comprising an arrangement for testing the record carrier
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/04—Detection or location of defective memory elements, e.g. cell constructio details, timing of test signals
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- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Quality & Reliability (AREA)
- General Engineering & Computer Science (AREA)
- Studio Devices (AREA)
- Television Signal Processing For Recording (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
The invention discloses a kind of SD card, video camera and SD card reliability early warning system.The SD card includes：Memory module, for storing audio, video data and representing the dependability parameter of SD card health status；Interface module, instruction is read for receiving data manipulation instruction and parameter, and the audio, video data of camera acquisition is write into memory module according to the data manipulation instruction, reads or wipe the audio, video data stored in memory module.The video camera includes：Main processing block, for generating data manipulation instruction and parameter manipulation instruction；SD card control module, is provided with driving layer interface and physical layer interface, and the physical layer interface is set to be called by the driving layer interface, and the data manipulation instruction and parameter are read into instruction is sent to SD card, and the audio, video data of camera acquisition is write into SD card.The application devises the instruction of reading reliability parameter on existing SD protocol basis, without redefining privately owned order, with extensive adaptability.
Description
Technical field
The present invention relates to digital camera technical field, specifically, it is related to a kind of SD card, video camera and SD
Card reliability early warning system.
Background technology
Safe digital card (Secure Digital Memory Card, referred to as SD card) is a kind of based on semiconductor
The storage device of flash memory, its compact but has high storage capacity and rapid data transmission rate, multiplex
In the additional storage space that Large Copacity is provided for electronic equipments such as mobile phone, MP3, digital camera and digital cameras.
For example, digital camera is used mostly SD card as local storage.In video process, numeral is taken the photograph
The master chip real time access SD card of camera, according to video and voice data that the PHY of standard will be gathered
Write-in SD card.After writing the data, user can as needed delete the data stored in SD card.
SD card inside includes some memory blocks for record data, and the service life of memory block is main by the block
Maximum erasable number of times determine.Once exceeding maximum erasable number of times, the reliability of the memory block will be notable
Reduce.Assuming that digital camera generates monitoring image according to 8Mbps code checks, and a capacity is the SD of 8G
The erasable number of times of card is 500 times.So under round-the-clock monitoring mode, the SD card set in video camera every about
Every two hours by totally it is erasable once, that is to say, that the service life of a SD card for 8G capacity is about
47 days.In order to ensure that monitoring audio, video data are stored safely, user is needed at least every 47 days more
Change a new SD card.
Importantly, current digital camera does not have life-span warning function, can only be in SD card life termination
Afterwards again to user feedback.User cannot in real time know the current health status of SD card, can not back up in advance
Data simultaneously change SD card, cause monitoring data to be lost.
Therefore, need badly one kind can the real-time detection life-span, carry out the SD card of reliability early warning.
The content of the invention
An object of the present invention be solve existing digital camera be unable to real-time detection its built-in SD card can
By the technological deficiency of property.
Embodiments of the invention provide a kind of SD card first, and it is applied to video camera, including：
Memory module, for storing audio, video data and representing the dependability parameter of SD card health status；
Interface module, reads instruction, according to the data manipulation instruction for receiving data manipulation instruction and parameter
The audio, video data of camera acquisition is write into memory module, the sound stored in memory module is read or wipe
Video data, and update the dependability parameter；And
Instruction is read according to the parameter and reads the dependability parameter, the audio, video data or reliability that will be read
Property parameter is forwarded.
In one embodiment, the dependability parameter includes following parameter：
The erasable number of times of SD card each memory block, always write-in data volume, bad number of blocks, intrinsic erasable number of times and
Write-in amplification factor.
In one embodiment, the memory module includes the data storage area and use for storing audio, video data
In the parameter memory block of memory reliability parameter；
The interface module reads instruction and the dependability parameter is read from parameter memory block according to the parameter.
In one embodiment, the parameter reads instruction includes the continuous a plurality of reading for reading specified location memory block
Instruction fetch.
In one embodiment, after data memory area performs write-in or erasing operation, the interface mould
Block updates the dependability parameter.
Embodiments of the invention also provide a kind of video camera, including：
Main processing block, for generating data manipulation instruction and parameter manipulation instruction；
SD card control module, is provided with：
Layer interface is driven, it is set to read instruction calls by the data manipulation instruction and parameter；
Physical layer interface, it is set to be called by the driving layer interface, by the data manipulation instruction and parameter
Read instruction to send to SD card, the audio, video data of camera acquisition is write into SD card, and, will be from SD
The audio, video data or dependability parameter read in card are sent to driving layer interface.
In one embodiment, the dependability parameter includes following parameter：
The erasable number of times of SD card each memory block, always write-in data volume, bad number of blocks, intrinsic erasable number of times and
Write-in amplification factor.
In one embodiment, the parameter manipulation instruction includes that the continuous a plurality of specified location for reading SD card is deposited
Store up the reading instruction of block.
In one embodiment, the physical layer interface is set to read the data manipulation instruction, parameter and refers to
The audio, video data of order and camera acquisition is converted to the physical layer operations instruction for meeting SD interface agreement, then sends out
Deliver to SD card；And
The audio, video data or dependability parameter that are read from SD card are converted to the number for meeting application layer protocol
According to retransmiting to Applied layer interface.
In one embodiment, the main processing block is additionally operable to：
The health status of SD card is calculated according to the dependability parameter；
The residue that operating habit according to SD card calculates SD card uses number of days；
Remaining in SD card is less than early warning value using number of days, and bad number of blocks is produced more than in the case of predetermined threshold value
Raw early warning signal.
Embodiments of the invention also provide a kind of SD card reliability early warning system, including SD as described above
Card and video camera.
The embodiment of the present invention weighs the health status of SD card by multiple dependability parameters, can accurately, have
The residue that effect ground calculates SD card uses number of days.And devise reading reliability on existing SD protocol basis
The instruction of parameter, without redefining privately owned order, the driver run in SD card control module is only needed
Corresponding simple adjustment is carried out, with extensive adaptability.
Other features and advantages of the present invention will illustrate in the following description, also, partly from specification
In become apparent, or by implement the present invention and understand.The purpose of the present invention and other advantages can pass through
Specifically noted structure is realized and obtained in specification, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with the present invention
Embodiment be provided commonly for explain the present invention, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the erasable modes of Nandflash for possessing different write-in amplification factors in the prior art；
Fig. 2 is the SD card of the embodiment of the present invention one and the structural representation of video camera；
The Applied layer interfaces of SD card control module and the calling of physical layer interface of the Fig. 3 for the embodiment of the present invention one
Relation schematic diagram；
The timing diagram that Fig. 4 is instructed for the parameter manipulation of the embodiment of the present invention two.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing the present invention is made into
One step ground is described in detail.
Embodiments of the invention are illustrated below in conjunction with Figure of description, it will be appreciated that described herein
Preferred embodiment is merely to illustrate and explain the present invention, and is not intended to limit the present invention.And what is do not collided
In the case of, the feature in embodiments of the invention can be combined with each other.
SD card is the storage device being widely used in digital camera, influences the factor of SD card service life and has
Many aspects.The embodiment of the present invention it is main from the intrinsic erasable number of times of Nandflash flash memories, write-in amplification factor,
Bad number of blocks, the erasable number of times of each memory cell and total these aspects of write-in data volume detect the reliability of SD cards.
First, realize storage in SD card is one piece of Nandflash flash memory, according to erasable to wherein memory cell
The difference of mode, can be divided into single-layer type cell S LC (Single Level Cell), multiple field unit MLC (Multi
Level Cell) and three-layer type unit TLC (Trinary-Level Cell).
The life-span of the Nandflash flash memories of different erasable modes simultaneously differs.SLC is in 1 storage element
(cell) data of 1 bit of storage (bit) in, its read or write speed is fast, longest-lived, about 100,000 times
Erasing and writing life.MLC is the data of 2 bits of the storage (bit) in 1 storage element (cell), its read-write
Speed is general, and the life-span is general, the erasing and writing life of about 3000 times or so.TLC is in 1 storage element
(cell) data of 3 bits of storage (bit) in, its read or write speed is slow, short life, about 500 to 1000
Secondary or so erasing and writing life.
Secondly, write-in amplification factor is also one of the factor in measurement SD card life-span.Write-in amplification factor is defined as
The ratio of actual erasable Nandflash data and the data volume for needing to write SD card.The characteristic of Nandflash
Determining before data are actually written into could write, it is necessary to carry out erasing to memory cell.As shown in figure 1,
If a block number is according to being stored in a memory cell, need write-in SD card is three block number evidences, actual
Erasable is also three Nandflash memory cell, then write-in amplification factor is 1；If a block number is according to being deposited
Be placed in two memory cell, then it is three block number evidences to need to write SD card, it is actual erasable but six
Nandflash memory cell, then write-in amplification factor is 2.Write-in amplification factor higher, it is meant that to depositing
The excessive erasable number of times of storage unit, causes the SD card life-span shorter.
Again, a reliability for SD card is weighed, also one key factor is the quantity of bad block.Nandflash
Technique does not ensure that stability of the memory cell in whole life cycle, produces and makes in Nandflash
Bad block can be produced during, the wiping to memory cell is caused, is write error.After there is bad block, SD card control
Device can select a block as an alternative from spare block.The quantity of bad block is bigger, illustrates the reliability of Nandflash
Property is poorer；When the total quantity of bad block exceedes the quantity of its spare block, illustrate that this SD card has broken down.
However, existing SD card does not support above-mentioned parameters, it is necessary to be performed using external equipment specific
Inquiry, statistics can just know these parameters.Embodiments of the invention provide a kind of SD card and video camera, in SD
Firmware program inside card is able to record that dependability parameter, including the intrinsic erasable number of times of Nandflash flash memories,
Write amplification factor, bad number of blocks, the erasable number of times of each memory cell and always write data volume, also, use
Normal instruction in existing SD agreements, video camera reads out dependability parameter, so as to calculate SD card be good for
Health situation.
Embodiment one
Fig. 2 is the SD card 250 of the embodiment of the present invention and the structural representation of video camera 230.Generally, SD card
250 inside that video camera 230 is arranged in forms such as clamping, grafting.
Video camera 230 mainly includes main processing block 231 and SD card control module 233.
Main processing block 231 is generated and reads instruction to the data manipulation instruction and parameter of SD card.Wherein data are grasped
Make instruction be by camera acquisition to audio, video data be written to the instruction of SD card, or, read or delete
Stored audio, video data in SD card；Parameter read instruction for read record in SD card for weighing
Each dependability parameter of its reliability.
SD card control module 233 is used to drive SD card, there is provided upper level applications and SD card PHY
Between conversion.Specifically, SD card control module 233 is provided with driving layer interface 235 and physical layer connects
Mouth 237.As shown in figure 3, driving layer interface 235 can be adjusted by upper level applications by operating system API
With.After main processing block 231 generates data manipulation instruction or parameter reads instruction, these instructions are first called
Layer interface 235 is driven, drives layer interface 235 to recall physical layer interface 237, by the data manipulation instruction
The operational order that instruction is converted to the physical layer for meeting SD agreements is read with parameter, is retransmited to SD card 250.
The audio, video data of camera acquisition is converted to physical layer interface 237 the data write-in SD for meeting SD agreements
Card, and, the audio, video data or dependability parameter that will be read from SD card, being converted to upper layer application can
Retransmited to Applied layer interface 238 with the data for recognizing.
After dependability parameter is obtained, main processing block 231 calculates SD card according to the dependability parameter
Health status, the residue that the operating habit according to SD card calculates SD card uses number of days.Make in the residue of SD card
Early warning value is less than with number of days, and bad number of blocks produces early warning signal more than in the case of predetermined threshold value.On surplus
The calculating process of remaining use number of days is by explanation in example below.
SD card 250 includes memory module 251 and interface module 253.Memory module 251 is used to store audio frequency and video
The dependability parameter of data and expression SD card health status.Memory module 251 is divided into system area 255, uses
In the data storage area 256 and the parameter memory block 257 for memory reliability parameter of storage audio, video data.
Interface module 253 is connected with SD card control module 233, reads for receiving data manipulation instruction and parameter
Instruction fetch, memory module 251 is write according to the data manipulation instruction by the audio, video data of camera acquisition,
Read or wipe the audio, video data stored in memory module 251.
Interface module 253 can also be write in data memory area 256 or erasing operation after, to ginseng
Dependability parameter in number memory block 257 is correspondingly updated.For example, updating SD card each memory block
Erasable number of times, data volume is always write, record bad number of blocks.
On the other hand, interface module 253 reads the reliability ginseng in instruction reading parameter memory block always according to parameter
Number, the audio, video data or dependability parameter of reading are forwarded, and are sent to SD card controller 233.
Embodiment two
Below with SD agreements as example, the design of parameter manipulation instruction in the present embodiment is illustrated.SD card controls mould
Block 233 runs SD card driver, sends SD CMD orders to accessing the data storage area 256 of SD card.
For example, CMD17 is used to read single memory block, an address for memory block is carried in CMD17, represented
The memory block is read out.In order to SD agreements in the instruction of single memory block is distinguished, the present invention is real
Applying the parameter manipulation instruction of example includes that the reading of specified location memory block in continuous a plurality of reading data storage area refers to
Order.As shown in figure 4, a parameter reads instruction and includes that continuous 5 carry different MBA memory block addresses
CMD17.After interface module 253 receives parameter reading instruction, the reliability in parameter memory block 257 is read
Property parameter, and the dependability parameter is fed back into SD card control module 233.
It should be noted that interface module 253 can also recognize the intrinsic erasable number of times of SD card, available capacity and
Write-in amplification factor, it is raw so that main processing block 231 calculates health status in write parameters memory block 257
Into SD card life-span early warning information.
The present embodiment also provides the remaining example using number of days that a kind of main processing block 231 calculates SD card.It is surplus
Remaining use number of days has much relations with the use habit of SD card.In this example, write with SD card is intraday
Enter amount and simplify expression use habit.If video camera is recorded a video with the code check of 8Mbps, then the writing of a day
It is exactly WD=24*60*60*8Mb=24*60*60MB.
Residue uses number of days TdayCan be expressed as：
Tday=(PE*CC-Dwrite_total)/(WAF*WD)
Wherein, PE is the intrinsic erasable number of times of SD card, and CC is the intrinsic available capacity of SD card, Dwrite_total
It is current written data amount, WAF is the write-in amplification factor of memory cell.
Since so, main processing block 231 reads some intrinsic ginsengs that instruction is obtained in that SD card using parameter
Number, the written data amount for updating at any time and bad number of blocks.Residue is calculated according to above formula and uses number of days, sentenced
Break it is remaining using number of days less than early warning value and bad number of blocks more than in the case of predetermined threshold value, producing early warning letter
Number.
Video camera 230 and SD card 250 constitute a SD card reliability early warning system, being capable of real-time detection SD
The card life-span, and carry out reliability early warning.Video camera 230 can by SD card life-span early warning information by short message,
Mail or client notification user, in order to client in the case where data are not lost, change SD card in advance.
While it is disclosed that implementation method as above, but described content is only to facilitate understand the present invention
And the implementation method for using, it is not limited to the present invention.Technology people in any the technical field of the invention
Member, on the premise of spirit and scope disclosed in this invention are not departed from, can be in the formal and details implemented
On make any modification and change, but scope of patent protection of the invention still must be with appending claims institute
The scope for defining is defined.
Claims (11)
1. a kind of SD card, is applied to video camera, it is characterised in that including：
Memory module, for storing audio, video data and representing the dependability parameter of SD card health status；
Interface module, reads instruction, according to the data manipulation instruction for receiving data manipulation instruction and parameter
The audio, video data of camera acquisition is write into memory module, the sound stored in memory module is read or wipe
Video data, and update the dependability parameter；And
Instruction is read according to the parameter and reads the dependability parameter, the audio, video data or reliability that will be read
Property parameter is forwarded.
2. SD card as claimed in claim 1, it is characterised in that the dependability parameter includes following parameter：
The erasable number of times of SD card each memory block, always write-in data volume, bad number of blocks, intrinsic erasable number of times and
Write-in amplification factor.
3. SD card as claimed in claim 1 or 2, it is characterised in that the memory module is included for depositing
Store up the data storage area and the parameter memory block for memory reliability parameter of audio, video data；
The interface module reads instruction and the dependability parameter is read from parameter memory block according to the parameter.
4. SD card as claimed in claim 3, it is characterised in that the parameter read instruction include it is continuous many
Bar reads the reading instruction of specified location memory block.
5. SD card as claimed in claim 3, it is characterised in that data memory area perform write-in or
After erasing operation, the interface module updates the dependability parameter.
6. a kind of video camera, it is characterised in that including：
Main processing block, for generating data manipulation instruction and parameter manipulation instruction；
SD card control module, is provided with：
Layer interface is driven, it is set to read instruction calls by the data manipulation instruction and parameter；
Physical layer interface, it is set to be called by the driving layer interface, by the data manipulation instruction and parameter
Read instruction to send to SD card, the audio, video data of camera acquisition is write into SD card, and, will be from SD
The audio, video data or dependability parameter read in card are sent to driving layer interface.
7. video camera as claimed in claim 6, it is characterised in that the dependability parameter includes following ginseng
Number：
The erasable number of times of SD card each memory block, always write-in data volume, bad number of blocks, intrinsic erasable number of times and
Write-in amplification factor.
8. video camera as claimed in claims 6 or 7, it is characterised in that the parameter manipulation instruction includes
The reading instruction of the continuous a plurality of specified location memory block for reading SD card.
9. video camera as claimed in claim 8, it is characterised in that the physical layer interface is set to institute
State that data manipulation instruction, parameter read instruction and the audio, video data of camera acquisition is converted to and meets SD interface
The physical layer operations instruction of agreement, retransmits to SD card；And
The audio, video data or dependability parameter that are read from SD card are converted to the number for meeting application layer protocol
According to retransmiting to Applied layer interface.
10. video camera as claimed in claim 8, it is characterised in that the main processing block is additionally operable to：
The health status of SD card is calculated according to the dependability parameter；
The residue that operating habit according to SD card calculates SD card uses number of days；
Remaining in SD card is less than early warning value using number of days, and bad number of blocks is produced more than in the case of predetermined threshold value
Raw early warning signal.
A kind of 11. SD card reliability early warning systems, it is characterised in that including：
SD card as any one of claim 1-5；And
Video camera as any one of claim 6-10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510817955.0A CN106779008A (en) | 2015-11-23 | 2015-11-23 | SD card, video camera and SD card reliability early warning system |
| PCT/CN2016/083274 WO2017088399A1 (en) | 2015-11-23 | 2016-05-25 | Sd card, camera and sd card reliability warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510817955.0A CN106779008A (en) | 2015-11-23 | 2015-11-23 | SD card, video camera and SD card reliability early warning system |
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| CN106779008A true CN106779008A (en) | 2017-05-31 |
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| CN201510817955.0A Pending CN106779008A (en) | 2015-11-23 | 2015-11-23 | SD card, video camera and SD card reliability early warning system |
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| WO (1) | WO2017088399A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110795316A (en) * | 2018-08-01 | 2020-02-14 | 昆山研达电脑科技有限公司 | Camera equipment warning method |
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| CN110597674B (en) * | 2019-08-05 | 2023-08-22 | 天津华来科技股份有限公司 | Memory detection method, device, video recording system and storage medium |
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| CN103092764A (en) * | 2011-10-31 | 2013-05-08 | 苹果公司 | Systems and methods for obtaining and using nonvolatile memory health information |
| CN103559115A (en) * | 2013-09-29 | 2014-02-05 | 记忆科技(深圳)有限公司 | SSD intelligent monitoring system based on SMART |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110795316A (en) * | 2018-08-01 | 2020-02-14 | 昆山研达电脑科技有限公司 | Camera equipment warning method |
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| WO2017088399A1 (en) | 2017-06-01 |
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