CN102307372A - Lloyd-Max-quantizer-based data compression method and equipment - Google Patents
Lloyd-Max-quantizer-based data compression method and equipment Download PDFInfo
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- CN102307372A CN102307372A CN201110248428A CN201110248428A CN102307372A CN 102307372 A CN102307372 A CN 102307372A CN 201110248428 A CN201110248428 A CN 201110248428A CN 201110248428 A CN201110248428 A CN 201110248428A CN 102307372 A CN102307372 A CN 102307372A
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Abstract
The invention discloses a Lloyd-Max-quantizer-based data compression method and Lloyd-Max-quantizer-based data compression equipment. The method comprises that: a transmitter quantizes input signals by utilizing a Lloyd-Max quantizer to obtain a codebook corresponding to the input signals; the transmitter quantizes the input signals by the codebook; and the transmitter transmits the quantized input signals to a receiver. In the embodiment of the invention, signal compression is performed by utilizing the Lloyd-Max quantizer to realize the adaptive quantization of signals, thereby realizing the compression of transmitted signals, optimizing a signal transmission process and improving the transmission efficiency of a system.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of data compression method and equipment based on the Lloyd-Max quantizer.
Background technology
At LTE (Long Term Evolution; Long Term Evolution)/LTE-A (LTE-Advanced; Senior LTE) in the system; Base station equipment (like eNB) is a distributed base station equipment; And base station equipment is by BBU (Building Base band Unit; Baseband processing unit); RRU (Radio Remote Unit; RF remote unit) constitutes; It is a kind of base station combination of can the flexible distributed formula installing; As shown in Figure 1, the sketch map of the base station equipment of forming for RRU and BBU, the interface between RRU and the BBU is the Ir interface; Be that RRU passes through the Ir interface and links to each other with BBU, and transmit the data between the two.
In the prior art, the Ir interface adopts transmission mediums such as optical fiber, if the data of Ir interface are compressed, then can significantly reduce the demand of transmission medium.The data compression mode of the Ir interface in the current LTE system is: regulates through input signal being carried out automatic gain, and the dynamic range of control signal, the quantification bit wide, the quantization algorithm that reduce signal accordingly are uniform quantization.This mode can guarantee on the basis of signal reliability, and to 12bit, the ratio before and after the compression is 4:3 with the data compression of 16bit bit wide.Wherein, the ratio of the size of data before and after the compression is a compression ratio.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem:
The compression ratio of prior art is low, and the versatility of algorithm is not strong, and when input signal was evenly distribution, uniform quantization was best quantizer; But when input signal was the non-uniform Distribution formula, uniform quantization was reasonable inadequately to the distribution of quantization level, can't fully remove the redundant composition in the signal.
Summary of the invention
The embodiment of the invention provides a kind of data compression method and equipment based on the Lloyd-Max quantizer, carries out Signal Compression to utilize the Lloyd-Max quantizer, improves system transmissions efficient.
In order to achieve the above object, the embodiment of the invention provides a kind of data compression method based on the Lloyd-Max quantizer, comprising:
Said transmitting terminal utilizes the Lloyd-Max quantizer that input signal is quantized, and obtains the corresponding code book of said input signal;
Said transmitting terminal quantizes said input signal through said code book;
Input signal after said transmitting terminal will quantize sends to receiving terminal.
The embodiment of the invention provides a kind of data compression device based on the Lloyd-Max quantizer, comprising:
Obtain module, be used to utilize the Lloyd-Max quantizer that input signal is quantized, obtain the corresponding code book of said input signal;
Quantization modules is used for through said code book said input signal being quantized;
Sending module is used for the input signal after quantizing is sent to receiving terminal.
Compared with prior art, the embodiment of the invention has the following advantages at least:
Utilize the Lloyd-Max quantizer to carry out Signal Compression, can realize signal is carried out adaptive quantizing, thereby the transmission course of signal is optimized in the compression of realization transmission signals, and improve the efficient of system transmissions.And can calculate the minimum boundary of lossless compress bit number, under the situation of introducing lossy compression method, under certain performance loss, attainable compression is lower, and is more reasonable to the selection of quantization level and quantification manner, makes that the signal transmission availability is higher.
Description of drawings
In order to be illustrated more clearly in technical scheme of the present invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously; Accompanying drawing in describing below only is some embodiments of the present invention; For those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is to be the sketch map of the base station equipment of RRU and BBU composition in the prior art;
Fig. 2 is the realization block diagram that provides in the embodiment of the invention one;
Fig. 3 is a kind of data compression method schematic flow sheet based on the Lloyd-Max quantizer that the embodiment of the invention one provides;
Fig. 4 is the realization block diagram that provides in the embodiment of the invention two;
Fig. 5 is a kind of data compression device structural representation based on the Lloyd-Max quantizer that the embodiment of the invention three provides.
Embodiment
The inventor notices in realizing process of the present invention: the technical performance of tolerance communication is from the quality and quantity of communication quantitative index measure of effectiveness, quality index degree of reiability to be discussed.When guaranteeing communication quality,, guarantee under limited channel capacity, can transmit more signal through seeking the mode that improves system effectiveness.Wherein, if then can there be a large amount of redundant compositions in signal without processing, therefore can remove unnecessary composition through modes such as quantification and compressions, realizes the lifting of validity.
In the practical application, produce quantization error, and introduce distortion, therefore need limit the minimum quantification compression coding mode of the required bit of searching under the distortion condition owing to quantize meeting.
In prior art; The LTE/LTE-A system adopts technology such as big bandwidth, many antennas; Thereby cause Ir interface data quantity transmitted bigger; Problems such as existing compression ratio is low; The embodiment of the invention provides a kind of data compression method and equipment based on the Lloyd-Max quantizer, through signal is carried out adaptive quantizing, realizes the compression of transmission signals; Optimize the signal transmission, to improve the efficient of system transmissions.
To combine the accompanying drawing among the present invention below, the technical scheme among the present invention is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment one
It (is signal that the embodiment of the invention one provides a kind of data based on the Lloyd-Max quantizer; Include but not limited to the signal of 3G/4G system) compression method; Be applied to comprise in the data transmission system of transmitting terminal and receiving terminal; For each data transmission set; It can be transmitting terminal; Also can be receiving terminal, so the structure that the theory diagram of Lloyd-Max quantizer can be as shown in Figure 2.
Wherein, power/amplitude adjuster, adaptive codebook quantizer are the functional module of data transmission set as transmitting terminal; Power/amplitude compensator, to separate the code book quantizer be the functional module of data transmission set as receiving terminal.In Fig. 2, A bit is the bit number before quantizing, and B bit is the bit number after quantizing, and A bit is greater than B bit.
For example, this method can be applicable to comprise in the base station equipment of BBU and RRU, and is used for the data that the Ir interface between BBU and the RRU is transmitted are compressed.When BBU when RRU sends data, then BBU is a transmitting terminal, RRU is a receiving terminal; When RRU when BBU sends data, then BBU is a receiving terminal, RRU is a transmitting terminal.
In order reasonably to distribute quantization level; Can seek the quantizer that the probability density function with signal is complementary; Less quantized interval is selected in zone in that signal probability density is relatively large; And at the less relatively bigger quantized interval of zone selection of probability density, thereby reduce the quantizing noise average power.
Based on the above idea, may be based on Lloyd-Max quantizer for adaptive data compression; Lloyd-Max quantizer core principle of the input signal at a given probability density <img TranNum = "87" file = "277610DEST_PATH_IMAGE001.GIF" he = "24 "img-content =" drawing "img-format =" jpg "inline =" no "orientation =" portrait "wi =" 33 "/> M quantization level and under conditions determined an optimal slicing Ping <img TranNum = "88" file = "870397DEST_PATH_IMAGE002.GIF" he = "24" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait" wi = "32" / > with quantization level <img TranNum = "89" file = "265606DEST_PATH_IMAGE003.GIF" he = "24" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait" wi = "32" />, so that the quantization noise average power <img TranNum = "90" file = "79978DEST_PATH_IMAGE004.GIF" he = "24" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait" wi = "24" /> Min.Wherein, Best layering level should be the mid point of two adjacent quantization levels; And the optimal quantization level is positioned on the probability barycenter of corresponding quantized interval, and algorithm is to set earlier an initial quantization level, and iterating based on above-mentioned two conditions calculates optimum data and separate.
Say that from theoretical this quantizer performance is optimum, but its quantizing structure is comparatively complicated, real-time implementation is difficulty very; And because the design of Lloyd-Max quantizer is the output procedure of signal is that stationary process is the basis; To these characteristics; The embodiment of the invention proposes a kind of self-adapting data compression scheme based on the Lloyd-Max quantizer-adaptive codebook and quantizes, and it realizes block diagram as shown in Figure 2.
Based on block diagram shown in Figure 2, as shown in Figure 3, should may further comprise the steps based on the data compression method of Lloyd-Max quantizer:
For example, transmitting terminal can carry out AGC (Automatic Gain Control, automatic gain control) adjustment to input signal.Wherein, in order to make the embodiment of the invention can support bigger input signal dynamic range, and make that adjusted signal is suitable for quantizing more, can carry out the AGC adjustment to input signal earlier.
In this step; Transmitting terminal can confirm earlier that the distribution character of input signal (carries out buffer memory like transmitting terminal with the input signal in the predetermined period T; And the corresponding training sequence of distribution character of structure and this input signal and the distribution character of the input signal of buffer memory in the statistics predetermined period T); Afterwards, transmitting terminal utilizes the Lloyd-Max quantizer that this training sequence is quantized, thereby can obtain the corresponding code book of input signal.
In the embodiment of the invention; Transmitting terminal can carry out real-time statistics (if the distribution character of known signal just need not statistics) to the signal distributions characteristic as required; The agreement measurement period is T, then the signal of T in the time period is carried out buffer memory, and adds up its distribution character (like average, variance etc.).
Wherein, the method for statistics has multiple, such as the probability density distribution of statistical signal and typical probability distribution curve comparison, looks for its most similarly probability distribution etc., repeats no more in the embodiment of the invention.
Further, the transmitting terminal structure satisfies the training sequence of the probability distribution of statistics, to guarantee the training sequence long enough.
In the embodiment of the invention, can utilize Lloyd-Max quantizer (promptly utilizing the Lloyd-Max quantization algorithm) that input signal or training sequence are quantized, thereby obtain the corresponding code book of input signal based on above-mentioned input signal or training sequence transmitting terminal.
In the embodiment of the invention; In the process that obtains the corresponding code book of input signal; The result who quantizes based on the Lloyd-Max quantizer; Transmitting terminal can be inquired about the code book collection of safeguarding in advance; And concentrate to select the corresponding code book of this input signal (be optimum code book, be the code book of the optimal quantization level that obtains based on the result who quantizes) from code book.After code book is concentrated the code book of selecting the input signal correspondence, transmitting terminal also need obtain the corresponding code book subscript of this input signal in this code book.
It should be noted that; Said process is the processing to transmitting terminal; At receiving terminal; Behind the input signal after receiving quantification; Also need accomplish the decoding of corresponding code book numbering, separate code book and quantize power/processes such as amplitude compensation; And in order to realize this process, transmitting terminal also need be carried out following operation.
Transmitting terminal obtained the corresponding code book subscript of input signal in code book after, transmitting terminal also need send to receiving terminal with the numbering (being that code book is positioned at the number information that code book is concentrated) of code book subscript and above-mentioned optimum code book; At receiving terminal; Receiving terminal utilizes the numbering of this code book subscript and code book to inquire about the code book collection of maintenance in advance, and (this code book collection is identical with the code book collection that transmitting terminal is safeguarded; Numbering through code book; Promptly can inquire the code book that transmitting terminal quantizes; Thereby can separate code book quantizes), and utilize Query Result that the input signal after quantizing is handled.
Further, the transmitted code of the subscript, the transmission side can be based on the size of the codebook code M determines the transmission bit width of the subscripts B, where, <img TranNum = "107" file = "902441DEST_PATH_IMAGE005.GIF" he = "24 "img-content =" drawing "img-format =" jpg "inline =" no "orientation =" portrait "wi =" 80 "/>.
When sending the numbering of code book; Because the optimum code book numbering of selecting is extremely important, will cause the whole mistakes of de-quantization in case pass mistake, so transmitting terminal need carry out coding protection to the numbering of the optimum code book selected; Carrying out the scheme of coding protection can select arbitrarily, can be repeated encoding etc.
When sending the numbering of code book subscript and code book, transmitting terminal is placed on Cyclic Prefix with the numbering of code book subscript and code book, perhaps, is placed on the position after data are punched.Wherein, when passing to receiving terminal, can be placed on Cyclic Prefix or data are punched about the transmission position of optimum code book numbering and place the optimum code book numbering behind the coding with the code book subscript that quantizes with through the optimum code book numbering behind the coding.
Based on above-mentioned situation, at receiving terminal, receiving terminal is accomplished the decoding of corresponding code book numbering, separates code book and quantizes, power/amplitude compensation.Wherein do not limit in the transfer mode embodiment of the invention of power/amplitude adjustment factor, can be through perhaps transmitting at vacant time slot at Cyclic Prefix.
Need to prove that the technical scheme that the embodiment of the invention provides is applicable to stationary signal, so the statistical property of signal is little over time, the change that available quantification code book can be not bigger, but statistical property may fluctuate to some extent at short notice.According to these characteristics, can adopt a kind of adaptive optimization scheme, through observing the excursion of its distribution character, train the typical code book of many groups according to its distribution character, and can carry out the selection of optimum code book through following dual mode.
Mode one: the statistical property through the real-time statistics signal is selected optimum code book.
Mode two: select optimum code book through calculating the quantification loss that quantizes the front and back signal, calculate the mode of quantification loss and can select to calculate EVM (error vector magnitude), or calculate mean square error etc., do not do qualification in the embodiment of the invention.
Based on technique scheme, the implementation complexity of the embodiment of the invention is lower, only need store corresponding code book collection at transmitting terminal and receiving terminal during realization, and quantized by transmitting terminal, carries out de-quantization by receiving terminal inquiry code book collection and gets final product.In addition; The characteristic distributions of compression back signal is changed less (as will significantly changing the distribution character of signal after the compression of A rule); Therefore the code book subscript after quantizing through adaptive codebook distributes corresponding consistent with data; The size distribution ratio of compression back corresponding data does not become; The space that further compression is arranged can be share the performance of further raising compression with other compression scheme; For example, can after connect modes such as piecemeal differential coding and segmentation compression, represent with littler bit wide to realize small-signal, and can be used as concrete an application of the embodiment of the invention.
In addition, also propose in the embodiment of the invention and can judge the mode of the limit bit number (being comentropy) of lossless compress according to the probability distribution of signal.Concrete, the minimum boundary that can draw average number of bits under the lossless case through the statistical information entropy.The LTE downlink signal as an example, with mean <img TranNum = "116" file = "231791DEST_PATH_IMAGE006.GIF" he = "16" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait" wi = "17" />, variance <img TranNum = "117" file = "430691DEST_PATH_IMAGE007.GIF" he = "24" img-content = "drawing" img-format = "jpg" inline = " no "orientation =" portrait "wi =" 25 "/> normal distribution, the probability distribution can be expressed as:
Can think that then minimum average transmission bit wide is under the prerequisite of lossless compress:
If the final compressed bit wide less than <img TranNum = "124" file = "660312DEST_PATH_IMAGE010.GIF" he = "15" img-content = "drawing" img-format = "jpg" inline = "no" orientation = "portrait "wi =" 31 "/>, is considered the introduction of lossy compression, statistical signal before and after compression by the mean square error of statistical signal loss.
In sum, in the embodiment of the invention, utilize the Lloyd-Max quantizer to carry out Signal Compression, can realize signal is carried out adaptive quantizing, thereby the transmission course of signal is optimized in the compression of realization transmission signals, and improve the efficient of system transmissions.And can calculate the minimum boundary of lossless compress bit number, under the situation of introducing lossy compression method, under certain performance loss, attainable compression is lower, and is more reasonable to the selection of quantization level and quantification manner, makes that the signal transmission availability is higher.
Embodiment two
The embodiment of the invention two provides a kind of data compression method based on the Lloyd-Max quantizer, so that this scheme is applied as example aspect the Ir data compression in the LTE system, realization block diagram as shown in Figure 4, can be effectively with data compression to 8 bit of 16bit.
Based on block diagram shown in Figure 4, then this method may further comprise the steps:
Step 1, transmitting terminal carry out AGC with signal handles the amplitude of adjustment signal.
Step 2, transmitting terminal storage size are M the code book of 4*256; Data bit width in the code book is 16bit (consistent with the data bit width after the AGC), and code book mainly generates according to signal variance, the fluctuation range of statistical signal variance; Geometric ratio is divided into 4 grades, generates corresponding 4 code books.
The variance of step 3, transmitting terminal statistical signal is selected optimum code book, and optimum code book numbering is carried out repeated encoding.
Step 4, transmitting terminal adopt the optimum code book of selecting to quantize signal, and the process of quantification is for passing through if ... The else statement carries out the logic comparison operation, judges that the code book under the signal is interval, exports the corresponding code book subscript in this interval.
Step 5, transmitting terminal pass to receiving terminal with the optimum code book numbering of code book subscript and coding back, and wherein the optimum code book numbering in coding back is placed on Cyclic Prefix foremost.
Step 6, receiving terminal are decoded to optimum code book numbering earlier, find corresponding code book, utilize this code book to search corresponding data through the mode of table look-up (being the code book collection), accomplish de-quantization and AGC factor recovery process.
Embodiment three
Based on the inventive concept same with said method, a kind of data compression device based on the Lloyd-Max quantizer also is provided in the embodiment of the invention, as shown in Figure 5, this equipment comprises:
Obtain module 11, be used to utilize the Lloyd-Max quantizer that input signal is quantized, obtain the corresponding code book of said input signal;
Sending module 13 is used for the input signal after quantizing is sent to receiving terminal.
Said acquisition module 11 specifically is used for confirming the distribution character of said input signal and the corresponding training sequence of the distribution character of structure and said input signal;
Utilize said Lloyd-Max quantizer that said training sequence is quantized, obtain the corresponding code book of said input signal.
Said acquisition module 11 is further used for the input signal in the predetermined period T is carried out buffer memory, and adds up the distribution character of the input signal of buffer memory in the said predetermined period T.
Said acquisition module 11 specifically is used for the result that quantizes based on said Lloyd-Max quantizer, the code book collection that inquiry is safeguarded in advance, and concentrate the code book of selecting said input signal corresponding from said code book.
Said acquisition module 11 also is used for obtaining the corresponding code book subscript of said input signal at said code book.
Said sending module 13 also is used for the numbering of said code book subscript and said code book is sent to said receiving terminal; Utilize the numbering of said code book subscript and said code book to inquire about the code book collection of safeguarding in advance by said receiving terminal, and utilize Query Result that the input signal after quantizing is handled.
In the transmission module 13 transmits the codebook subscripts, based on the code size M of the code determines the transmission of the bit width of the subscripts B, where, <img TranNum = "147" file = "397324DEST_PATH_IMAGE005.GIF "he =" 24 "img-content =" drawing "img-format =" jpg "inline =" no "orientation =" portrait "wi =" 80 "/>.
When said sending module 13 sends the numbering of said code book, the numbering of said code book is carried out coding protection.
When said sending module 13 sends the numbering of said code book subscripts and said code book, the numbering of said code book subscript and said code book is placed on Cyclic Prefix, perhaps, be placed on the position after data are punched.
This equipment also comprises:
Adjusting module 14 is used for said input signal is carried out power and/or amplitude adjustment.
Wherein, each module of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium; Comprise that some instructions are with so that a computer equipment (can be a personal computer; Server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, module in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (20)
1.
A kind of data compression method based on the Lloyd-Max quantizer is characterized in that, comprising:
Said transmitting terminal utilizes the Lloyd-Max quantizer that input signal is quantized, and obtains the corresponding code book of said input signal;
Said transmitting terminal quantizes said input signal through said code book;
< b TranNum=" 167 ">input signal after said transmitting terminal will quantize sends to receiving terminal.</b>
2.
The method of claim 1 is characterized in that, said transmitting terminal utilizes the Lloyd-Max quantizer that input signal is quantized, and obtains the corresponding code book of said input signal, comprising:
Said transmitting terminal is confirmed the distribution character of said input signal, and the corresponding training sequence of the distribution character of structure and said input signal;
< b TranNum=" 174 ">said transmitting terminal utilizes said Lloyd-Max quantizer that said training sequence is quantized, and obtains the corresponding code book of said input signal.</b>
3.
Method as claimed in claim 2 is characterized in that, said transmitting terminal is confirmed the distribution character of said input signal, comprising:
< b TranNum=" 179 ">said transmitting terminal carries out buffer memory with the input signal in the predetermined period T, and adds up the distribution character of the input signal of buffer memory in the said predetermined period T.</b>
4.
Method as claimed in claim 1 or 2 is characterized in that, said transmitting terminal obtains the corresponding code book of said input signal, comprising:
< b TranNum=" 184 ">based on the result that said Lloyd-Max quantizer quantizes, said transmitting terminal inquiry is the code book collection of maintenance in advance, and concentrates the code book of selecting said input signal corresponding from said code book.</b>
5.
Method as claimed in claim 4 is characterized in that, said transmitting terminal is concentrated the code book of selecting said input signal corresponding from said code book, also comprises afterwards:
< b TranNum=" 189 ">said transmitting terminal obtains the corresponding code book subscript of said input signal in said code book.</b>
6.
Method as claimed in claim 5 is characterized in that, said transmitting terminal obtains the corresponding code book subscript of said input signal in said code book, also comprise afterwards:
< b TranNum=" 194 ">said transmitting terminal sends to said receiving terminal with the numbering of said code book subscript and said code book; Utilize the numbering of said code book subscript and said code book to inquire about the code book collection of safeguarding in advance by said receiving terminal, and utilize Query Result that the input signal after quantizing is handled.</b>
As claimed in claim 6, characterized in that the transmission of the code of the subscripts, the transmitting side based on the codebook size M determines the transmission of the code of the next target bit width B, where ,?
.
8. < b TranNum=" 201 ">method as claimed in claim 6 is characterized in that, when sending the numbering of said code book, said transmitting terminal carries out coding protection to the numbering of said code book.</b>
9. < b TranNum=" 204 ">method as claimed in claim 6; It is characterized in that when sending the numbering of said code book subscript and said code book, said transmitting terminal is placed on Cyclic Prefix with the numbering of said code book subscript and said code book; Perhaps, be placed on position after data are punched.</b>
10.
The method of claim 1 is characterized in that, said transmitting terminal utilizes the Lloyd-Max quantizer that input signal is quantized, and obtains the corresponding code book of said input signal, also comprises before:
< b TranNum=" 209 ">said transmitting terminal carries out power and/or amplitude adjustment to said input signal.</b>
11.
A kind of data compression device based on the Lloyd-Max quantizer is characterized in that, comprising:
Obtain module, be used to utilize the Lloyd-Max quantizer that input signal is quantized, obtain the corresponding code book of said input signal;
Quantization modules is used for through said code book said input signal being quantized;
< b TranNum=" 218 ">sending module is used for the input signal after quantizing is sent to receiving terminal.</b>
12.
Equipment as claimed in claim 11 is characterized in that,
Said acquisition module specifically is used for confirming the distribution character of said input signal and the corresponding training sequence of the distribution character of structure and said input signal;
< b TranNum=" 225 ">utilize said Lloyd-Max quantizer that said training sequence is quantized, and obtain the corresponding code book of said input signal.</b>
13.
Equipment as claimed in claim 12 is characterized in that,
< b TranNum=" 230 ">said acquisition module is further used for the input signal in the predetermined period T is carried out buffer memory, and adds up the distribution character of the input signal of buffer memory in the said predetermined period T.</b>
14.
Like claim 11 or 12 described equipment, it is characterized in that,
< b TranNum=" 235 ">said acquisition module specifically is used for the result that quantizes based on said Lloyd-Max quantizer, the code book collection that inquiry is safeguarded in advance, and concentrate the code book of selecting said input signal corresponding from said code book.</b>
15.
Equipment as claimed in claim 14 is characterized in that,
< b TranNum=" 240 ">said acquisition module also is used for obtaining the corresponding code book subscript of said input signal at said code book.</b>
16.
Equipment as claimed in claim 15 is characterized in that,
< b TranNum=" 245 ">said sending module also is used for the numbering of said code book subscript and said code book is sent to said receiving terminal; Utilize the numbering of said code book subscript and said code book to inquire about the code book collection of safeguarding in advance by said receiving terminal, and utilize Query Result that the input signal after quantizing is handled.</b>
17.
Equipment as claimed in claim 16 is characterized in that,
Send timestamp under the said code book at said sending module, based on target bit wide B under the said code book of the definite transmission of the big or small M of said code book, wherein,
18. < b TranNum=" 255 ">equipment as claimed in claim 16 is characterized in that, when said sending module sends the numbering of said code book, the numbering of said code book is carried out coding protection.</b>
< 19. b TranNum=" 258 ">equipment as claimed in claim 16; It is characterized in that; When said sending module sends the numbering of said code book subscript and said code book; The numbering of said code book subscript and said code book is placed on Cyclic Prefix; Perhaps, be placed on position after data are punched.</b>
20.
Equipment as claimed in claim 11 is characterized in that, also comprises:
< b TranNum=" 263 ">adjusting module is used for said input signal is carried out power and/or amplitude adjustment.</b>
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| PCT/CN2012/078431 WO2013007185A1 (en) | 2011-07-14 | 2012-07-10 | Data compression method and device |
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| WO2013007185A1 (en) * | 2011-07-14 | 2013-01-17 | 电信科学技术研究院 | Data compression method and device |
| CN103631756A (en) * | 2012-08-22 | 2014-03-12 | 电信科学技术研究院 | Level quantization method based on equal noise and achieving device thereof |
| CN103905149A (en) * | 2012-12-27 | 2014-07-02 | 联发科技（新加坡）私人有限公司 | Methods for designing codebook, communication device and codebook training method |
| CN113258935A (en) * | 2021-05-25 | 2021-08-13 | 山东大学 | Communication compression method based on model weight distribution in federated learning |
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