CN103730155A - Data writing method and data writing device - Google Patents

Data writing method and data writing device Download PDF

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Publication number
CN103730155A
CN103730155A CN201210381337.2A CN201210381337A CN103730155A CN 103730155 A CN103730155 A CN 103730155A CN 201210381337 A CN201210381337 A CN 201210381337A CN 103730155 A CN103730155 A CN 103730155A
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data
absolute difference
threshold value
storer
written
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CN103730155B (en
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方运潭
李华伟
李晓维
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Huawei Technologies Co Ltd
Institute of Computing Technology of CAS
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Huawei Technologies Co Ltd
Institute of Computing Technology of CAS
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C13/00Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00
    • G11C13/0002Digital stores characterised by the use of storage elements not covered by groups G11C11/00, G11C23/00, or G11C25/00 using resistive RAM [RRAM] elements
    • G11C13/0021Auxiliary circuits
    • G11C13/0069Writing or programming circuits or methods

Abstract

The invention embodiment provides a data writing method and a data writing device. The data writing method is as follows: acquiring an absolute difference value between to-be-written data and data stored in a memory; judging whether the absolute difference value is larger than a preset threshold value; and if the judgment is yes, writing the to-be-written data into the memory; otherwise, performing no data writing operation. The data writing method and the data writing device provided by the embodiment of the invention can be used to effectively reduce the times for writing operation on the memory, so that the adverse effects brought by can be reduced.

Description

Method for writing data and device
Technical field
The present invention relates to data storage technology, relate in particular to a kind of method for writing data and device, belong to electronic technology field.
Background technology
Phase transition storage (Phase Change Memory, PCM) is a kind of novel nonvolatile memory, and it comes respectively presentation logic value 0 and logical value 1 by the low resistance under high resistance and crystalline state under amorphous state.Than traditional static RAM (Static Random Access Memory, SRAM) and dynamic RAM (Dynamic Random Access Memory, DRAM), PCM still can keep stored data after power-off, storage density is higher, almost do not leak electricity, and there is the ability of better extensibility and tolerance soft error.Therefore, PCM is subject to the extensive concern of industry member and academia, and has the alternative legacy memory of very large potentiality to become memory product of future generation.At present, some company has produced PCM prototype and has even started volume production PCM.
Although PCM has many advantages, its write energy consumption high, write that number of times is limited, write delay is large, these undesirable elements relevant with write operation have affected the practical application of PCM.Therefore, how being reduced in and using the ill effect of bringing due to write operation in PCM process, is the research topic that has meaning.
Summary of the invention
For the defect existing in prior art, the embodiment of the present invention provides a kind of method for writing data and device, for effectively reducing the number of times that storer is carried out to write operation, thereby reduces the ill effect of bringing.
First aspect, provides a kind of method for writing data, comprising:
Obtain the absolute difference of having stored data in data to be written and storer;
Judge whether described absolute difference is greater than predetermined threshold value;
If be judged as YES, described data to be written are write to described storer; Otherwise, not executing data write operation.
In the possible implementation of the first of first aspect, if described, be judged as YES, described data to be written are write to described storer, specifically comprise:
If be judged as YES, described data to be written and the described data of having stored are carried out to data comparison by turn, determine different data bit;
According to described data to be written, described different data bit is upgraded.
In conjunction with the possible implementation of the first of first aspect or first aspect, in the possible implementation of the second of first aspect, described data are video data or view data.
Second aspect, provides a kind of data transfer apparatus, comprises absolute difference acquisition module, control module and data writing module, wherein:
Described absolute difference acquisition module, has stored the absolute difference of data for obtaining data to be written and storer;
Described control module, for judging whether described absolute difference is greater than predetermined threshold value; Only, when being judged as YES, control described data writing module executable operations;
Described data writing module is for writing described storer by described data to be written.
In the possible implementation of the first of second aspect, described control module also, for described data to be written and the described data of having stored are carried out to data comparison by turn, is determined different data bit; If judgement knows that described absolute difference is greater than predetermined threshold value, control described data writing module described different data bit is upgraded.
In conjunction with the possible implementation of the first of second aspect, in the possible implementation of the second of second aspect, described control module comprises threshold value comparing unit, data bit comparing unit, gating unit and switch element, wherein:
Described threshold value comparing unit is for comparing described absolute difference and described predetermined threshold value, and the comparative result whether described absolute difference is greater than described predetermined threshold value is offered to described gating unit;
Described data bit comparing unit is used for described data to be written and the described data of having stored to carry out data comparison by turn, and the whether identical comparative result of each data bit is offered to described gating unit;
If described gating unit is greater than described predetermined threshold value for described absolute difference, the whether identical comparative result of described each data bit is offered to described switch element, if described absolute difference is less than or equal to described predetermined threshold value, the comparative result that described absolute difference is less than or equal to described predetermined threshold value offers described switch element;
Described switch element is connected between described data writing module and described storer, for when receiving the whether identical comparative result of described each data bit, for different data bit, open being connected between data writing module and described storer described in conducting; Otherwise, in closed condition, disconnect being connected between described data writing module and described storer.
In conjunction with the possible implementation of the second of second aspect, in the third possible implementation of second aspect, described threshold value comparing unit is comparer, and/or described data bit comparing unit is XOR gate or same or door, and/or described gating unit is MUX, and/or described switch element is triple gate.
In conjunction with second aspect or second aspect first to three in any possible implementation, in the 4th kind of possible implementation of second aspect, described storer is phase transition storage or resistive memories or magnetic store.
The third aspect, provides a kind of memory device, comprises non-volatile storer, for storing data; Arbitrary data transfer apparatus with the embodiment of the present invention.
In the possible implementation of the first of the third aspect, described non-volatile storer is phase transition storage or resistive memories or magnetic store.
According to the method for writing data of the embodiment of the present invention and device, by obtaining the absolute difference of having stored data in data to be written and storer, both absolute differences and predetermined threshold value are compared, to judge in the deviation range whether this absolute difference accept user, and only when this absolute difference exceeds the deviation range that user accepts, be that absolute difference is while being greater than predetermined threshold value, by writing data into memory to be written, to having stored accordingly data, upgrade, otherwise, do not carry out write operation, thereby can be effective, reasonably reduce storer is carried out to the ill effect that write operation brings.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic flow sheet of the method for writing data of one embodiment of the invention.
Fig. 2 is the structural representation of the data transfer apparatus of one embodiment of the invention.
Fig. 3 is the structural representation of an example of control module in the embodiment of the present invention.
Fig. 4 is the circuit diagram of the data transfer apparatus of another embodiment of the present invention.
Embodiment
The method for writing data of the embodiment of the present invention is for example carried out by a data transfer apparatus, this data transfer apparatus both can with the integrated setting of storer, also can be independent of storer setting, it all can be used in the method for writing data of realizing the embodiment of the present invention.
Fig. 1 is the schematic flow sheet of the method for writing data of one embodiment of the invention.As shown in Figure 1, this method for writing data comprises:
101, obtain the absolute difference of having stored data in data to be written and storer;
Particularly, when data transfer apparatus gets the new data of storer to be written, from storer, read the legacy data of having stored accordingly, new data and legacy data are compared, calculate both absolute differences, i.e. the absolute value of difference.For example, new data is that 64(is shown 01000000 with binary form), legacy data is that 62(is shown 00111110 with binary form).Wherein, with the legacy data of new data " accordingly ", can be the data that record same information, the pixel value of for example recording of video.Data transfer apparatus can obtain new data by any-mode, both can directly receive the new data of user's input, also can obtain new data from any miscellaneous equipment.For example, data transfer apparatus and cyclic parameter checkout equipment, this equipment by the cycle by the reporting parameters newly detecting to data transfer apparatus, when data transfer apparatus receives new data at every turn, this new data and the relevant parameter of write store are compared, calculate both absolute differences.
102, judge whether described absolute difference is greater than predetermined threshold value;
Particularly, user selects suitable threshold value according to the demand of application in advance, and this threshold value is user's acceptable error thresholds.User is configured to selected threshold value in data transfer apparatus.For example, for Video Applications, user can tolerate the slight deviations of pixel value, and data are that the difference between 64 and 62 pixel is very little, and it is 62 also very little on the impact of video quality that the pixel that is 64 by data changes into.Based on this mistake tolerance characteristic of Video Applications, user can be 2 by the Threshold of Video Applications.
When data transfer apparatus gets after the absolute difference of new data and legacy data in step 101, obtained absolute difference and pre-stored threshold value are compared, judge whether absolute difference is greater than threshold value, for example, above-mentioned new data is 64, legacy data is 62 o'clock, both absolute differences are 2, and threshold value is 2, judge that absolute difference is not more than threshold value.
103, if be judged as YES, described data to be written are write to described storer; Otherwise, not executing data write operation.
Particularly, only when the judged result of step 102 is that absolute difference is while being greater than threshold value, by new data write store, so that legacy data is upgraded.If absolute difference is less than or equal to threshold value, think that difference between new data and legacy data, in user's acceptable deviation range, do not upgrade legacy data, maintain storage data in described storer constant.
According to the method for writing data of the embodiment of the present invention, by obtaining the absolute difference of having stored data in data to be written and storer, both absolute differences and predetermined threshold value are compared, to judge in the deviation range whether this absolute difference accept user, and only when this absolute difference exceeds the deviation range that user accepts, be that absolute difference is while being greater than predetermined threshold value, by writing data into memory to be written, to having stored accordingly data, upgrade, otherwise, do not carry out write operation, thereby can be effective, reasonably reduce storer is carried out to the ill effect that write operation brings.
When storer be write energy consumption high, write the life-span during limited novel non-volatile storer, for example, while being PCM, resistive memories (RRAM), magnetic store (MRAM), the beneficial effect that adopts the method for writing data of above-described embodiment to obtain is more obvious, efficiency and the life-span of effectively having improved storer.
In above-mentioned method for writing data, the data of having stored in data transfer apparatus read memory, and in step 103 during by writing data into memory to be written, concrete read-write operation can adopt any-mode to realize.For example, when adopting hardware circuit to realize data transfer apparatus, for carrying out the circuit of data write operation and can designing according to different memory characteristics for the circuit that carries out data read operation.The embodiment of the present invention does not limit this.
Further, in above-mentioned method for writing data, if described, be judged as YES, described data to be written write to described storer, specifically comprise:
Described data to be written and the described data of having stored are carried out to data comparison by turn, determine different data bit;
If be judged as YES, according to described data to be written, described different data bit is upgraded.
Particularly, in step 103 during executing data write operation, by by data to be written with store data and compare by turn, determine which data bit is identical, which data bit difference, and only upgrading for different data bit.For example, take the pixel value of above-mentioned Video Applications as example, if default threshold value is 2, pixel value to be written is that 64(is shown 01000000 with binary form), storage pixel value is that 61(is shown 00111101 with binary form), judgement knows that pixel value to be written and the absolute difference of storage pixel value are greater than threshold value, " 01000000 " and " 00111101 " are compared by turn, and only for different pieces of information position between the two, carry out data write operation, thereby further reduced the data write operation to storer.
Through the present inventor, test confirmation: take foreman video sequence as example, compared with existing write operation method (that is: not using the method for minimizing write operation), use after above-mentioned method for writing data, what storer was total writes number of times from 60,825, and 600 are reduced to 12,300,360 times, the capitalization number of times of storer is reduced to 157 from 300, and efficiency and life-span are all obviously better than existing write operation method.By threshold value is rationally set, take threshold value setting as 2 as example, the structural similarity of video is 0.9954, and close to 1, video quality is still fine.
Above-mentioned data write method be only not limited to data by turn relatively write method be combined, the method also can with other available data write method, as Data flipping coding etc. combines, further reduce the write operation of storer.
Fig. 2 is the structural representation of the data transfer apparatus of one embodiment of the invention.As shown in Figure 2, this data transfer apparatus 20 comprises absolute difference acquisition module 21, control module 22 and data writing module 23, wherein:
Described absolute difference acquisition module 21, has stored the absolute difference of data for obtaining data to be written and storer;
Described control module 22, for judging whether described absolute difference is greater than predetermined threshold value; Only, when being judged as YES, control described data writing module 23 executable operations;
Described data writing module 23 is for writing described storer by described data to be written.
Above-mentioned data transfer apparatus 20 idiographic flows of executing data write operation are identical with the method for writing data of the embodiment of the present invention, so locate to repeat no more.
According to the data transfer apparatus of the embodiment of the present invention, by obtaining the absolute difference of having stored data in data to be written and storer, both absolute differences and predetermined threshold value are compared, to judge in the deviation range whether this absolute difference accept user, and only when this absolute difference exceeds the deviation range that user accepts, be that absolute difference is while being greater than predetermined threshold value, by writing data into memory to be written, to having stored accordingly data, upgrade, otherwise, do not carry out write operation, thereby can be effective, reasonably reduce storer is carried out to the ill effect that write operation brings.
When storer be write energy consumption high, write the life-span during limited novel non-volatile storer, for example, while being PCM, resistive memories (RRAM), magnetic store (MRAM), it is more obvious that the data transfer apparatus that adopts above-described embodiment carries out to storer the beneficial effect that data write operation obtains, efficiency and the life-span of effectively having improved storer.
Further, in above-mentioned data transfer apparatus, control module also, for described data to be written and the described data of having stored are carried out to data comparison by turn, is determined different data bit; If judgement knows that described absolute difference is greater than predetermined threshold value, control described data writing module described different data bit is upgraded.
According to above-mentioned data transfer apparatus, further reduced the data write operation to storer.
Fig. 3 is the structural representation of an example of control module in the embodiment of the present invention.As shown in Figure 3, control module 30 comprises threshold value comparing unit 31, data bit comparing unit 32, gating unit 33 and switch element 34, wherein:
Described threshold value comparing unit 31 is for described absolute difference and described predetermined threshold value are compared, and the comparative result whether described absolute difference is greater than described predetermined threshold value is offered to described gating unit 33;
Described data bit comparing unit 32 is for described data to be written and the described data of having stored are carried out to data comparison by turn, and the whether identical comparative result of each data bit is offered to described gating unit 33;
If described gating unit 33 is greater than described predetermined threshold value for described absolute difference, the whether identical comparative result of described each data bit is offered to described switch element 34, if described absolute difference is less than or equal to described predetermined threshold value, the comparative result that described absolute difference is less than or equal to described predetermined threshold value offers described switch element 34;
Described switch element 34 is connected between data writing module (not shown in Fig. 3) and storer (not shown in Fig. 3), for when receiving the whether identical comparative result of described each data bit, for different data bit, open being connected between data writing module and described storer described in conducting; Otherwise, in closed condition, disconnect being connected between described data writing module and described storer.
Each unit in above-mentioned control module 30 all can adopt electrical devices/circuits to realize.
Take a physical circuit as example, specific implementation and the operating process of the corresponding data transfer apparatus by above-mentioned control module 30 are elaborated below.
Fig. 4 is the circuit diagram of the data transfer apparatus 40 of another embodiment of the present invention.With reference to Fig. 4, and describe as an example of Video Applications example.For example, in frame of video, each pixel represents with 8 bits (i.e. 8 data bit), data bit D as shown in Figure 4 0-D 7.In data transfer apparatus 40, be provided with the threshold value Th of the tolerable pixel deviation of indicating user in advance, threshold value Th is non-negative integer, and according to user, the requirement of video quality is determined.
In the data transfer apparatus 40 shown in Fig. 4, comprise that reading circuit 41, write circuit 42(are data writing modules), absolute difference counter 43(is absolute difference acquisition module) and control module, wherein, in control module, adopt comparer 44 as threshold value comparing unit, adopt XOR gate 45 as data bit comparing unit, adopt MUX (MUX) 46 as gating unit to be, adopt the triple gate 47 of high level conducting as switch element.
Wherein, reading circuit 41 and write circuit 42 are respectively used to from storer reading out data and to storer data writing, they can directly use the read/write circuit method for designing of existing storer (being for example PCM) to realize.
Absolute difference counter 43 is for the absolute difference between the legacy data Dout that calculates new data Din to be written and reading circuit 41 and read.Absolute difference counter 43 is connected with comparer 44, and the absolute difference between new data Din and legacy data Dout is offered to comparer 44.
Comparer 44 is stored pre-configured threshold value Th, the absolute difference from absolute difference calculator 43 and threshold value Th is compared, for example, if absolute difference is greater than threshold value Th, output " 11111111 ", if absolute difference is less than or equal to threshold value Th, output " 00000000 ".The control signal of comparer 44 using comparative result as MUX 46, and " 0 " the road input signal using comparative result as MUX 46.
New data Din and legacy data Dout are also as two inputs of XOR gate 45, and XOR gate 45 is carried out xor operation to new data Din and legacy data Dout, and " 1 " the road input signal using the result of xor operation as MUX 46.
MUX 46, for according to control signal, is carried out gating to " 0 " road input signal and " 1 " road input signal; When control signal is " 11111111 ", gating " 1 " road input signal, that is: " 1 " road input signal is exported to self connect triple gate 47; When control signal is " 00000000 ", gating " 0 " road input signal, that is: " 0 " road input signal is exported to self connect triple gate 47;
When in frame of video, each pixel is 8 bit, can adopt 8 triple gates 47,8 bits of the signal that MUX 46 is exported are corresponding one by one with 8 triple gates 47.Owing to adopting the triple gate 47 of high level conducting in this example, therefore, when the comparative result of comparer 44 is " 00000000 ", 8 triple gate 47 all not conductings, forbid the write operation of write circuit 42; When the comparative result of comparer 44 is " 11111111 ", the xor operation result of XOR gate 45 determines which conducting in 8 triple gates 47, which not conducting, that is: corresponding triple gate 47 conductings of bit that only new data Din and legacy data Dout are not identical, the write operation of permission write circuit 42.
Because triple gate 47 is connected between each storage unit of write circuit 42 and storer, therefore only when triple gate 47 conducting, write circuit 42 can write new data Din corresponding storage unit.
The hardware circuit of above-mentioned data transfer apparatus 40 is realized simple, and area overhead is low.
Circuit structure shown in Fig. 4 is only an example of the data transfer apparatus of the embodiment of the present invention, and the principle of the data transfer apparatus that those skilled in the art can be based on the embodiment of the present invention, modifies to the physical circuit element of circuit structure and/or employing.For example, adopt the triple gate of low level conducting, considerably: with or door replace XOR gate, and set up a phase inverter between the input port of " 0 " road input signal of comparer and MUX.
In addition, although the data transfer apparatus of above-described embodiment can be greater than 0 threshold value and rationally be reduced by configuration the number of times of write operation, but when very strict to data accuracy requirement, it also can, by threshold value is configured to 0, realize existing data write operation.
In another embodiment, a kind of memory device, comprising: non-volatile storer, for storing data; With any one data transfer apparatus providing in above-described embodiment.
Concrete, non-volatile storer can be phase transition storage or resistive memories or magnetic store.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (10)

1. a method for writing data, is characterized in that, comprising:
Obtain the absolute difference of having stored data in data to be written and storer;
Judge whether described absolute difference is greater than predetermined threshold value;
If be judged as YES, described data to be written are write to described storer; Otherwise, not executing data write operation.
2. method for writing data according to claim 1, is characterized in that, if described, is judged as YES, and described data to be written is write to described storer, specifically comprises:
If be judged as YES, described data to be written and the described data of having stored are carried out to data comparison by turn, determine different data bit;
According to described data to be written, described different data bit is upgraded.
3. according to the arbitrary method for writing data described in claim 1-2, it is characterized in that, described data are video data or view data.
4. a data transfer apparatus, is characterized in that, comprises absolute difference acquisition module, control module and data writing module, wherein:
Described absolute difference acquisition module, has stored the absolute difference of data for obtaining data to be written and storer;
Described control module, for judging whether described absolute difference is greater than predetermined threshold value; Only, when being judged as YES, control described data writing module executable operations;
Described data writing module is for writing described storer by described data to be written.
5. data transfer apparatus according to claim 4, is characterized in that, described control module also, for described data to be written and the described data of having stored are carried out to data comparison by turn, is determined different data bit; If judgement knows that described absolute difference is greater than predetermined threshold value, control described data writing module described different data bit is upgraded.
6. data transfer apparatus according to claim 5, is characterized in that, described control module comprises threshold value comparing unit, data bit comparing unit, gating unit and switch element, wherein:
Described threshold value comparing unit is for comparing described absolute difference and described predetermined threshold value, and the comparative result whether described absolute difference is greater than described predetermined threshold value is offered to described gating unit;
Described data bit comparing unit is used for described data to be written and the described data of having stored to carry out data comparison by turn, and the whether identical comparative result of each data bit is offered to described gating unit;
If described gating unit is greater than described predetermined threshold value for described absolute difference, the whether identical comparative result of described each data bit is offered to described switch element, if described absolute difference is less than or equal to described predetermined threshold value, the comparative result that described absolute difference is less than or equal to described predetermined threshold value offers described switch element;
Described switch element is connected between described data writing module and described storer, for when receiving the whether identical comparative result of described each data bit, for different data bit, open being connected between data writing module and described storer described in conducting; Otherwise, in closed condition, disconnect being connected between described data writing module and described storer.
7. data transfer apparatus according to claim 6, it is characterized in that, described threshold value comparing unit is comparer, and/or described data bit comparing unit is XOR gate or same or door, and/or described gating unit is MUX, and/or described switch element is triple gate.
8. according to the arbitrary data transfer apparatus described in claim 4-7, it is characterized in that, described storer is phase transition storage or resistive memories or magnetic store.
9. a memory device, is characterized in that, comprising:
Non-volatile storer, for storing data; With
According to the arbitrary data transfer apparatus described in claim 4-7.
10. memory device according to claim 9, is characterized in that, described non-volatile storer is phase transition storage or resistive memories or magnetic store.
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CN109510739A (en) * 2018-12-26 2019-03-22 上海新储集成电路有限公司 A kind of data transmission method applied to data center
CN111308140A (en) * 2020-02-28 2020-06-19 宁波三星医疗电气股份有限公司 Difference type active reporting meter reading method

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