CN1351423A - Adaptice encode/decode method with variable compression ratio - Google Patents
Adaptice encode/decode method with variable compression ratio Download PDFInfo
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Abstract
An adaptive encode/decode method with variable compression ratio and its device is disclosed. It features its variable compression ratio, that is, its encode resolution varies with input signals and their difference. Its device has a resolution regulator to receiver compressed data and/or delta signals for regulating the quantizing and dequantizing resolution of quantizer and dequantizer according to variation of compressed data and/or dalta value, resulting in low error of compression encode/decode.
Description
The present invention relates to adaptability variable compressive ratio coding and decoding method and device thereof in a kind of electric communication technique field transmission, particularly relate to a kind of method that digital signal is compressed and decompresses, can overcome traditional step pulse-code modulation (Delta Pulse Code Modulation, be called for short DPCM) and adaptability step pulse-code modulation (Adaptive Delta Pulse Code Modulation is called for short ADPCM) equipressure reduce the staff adaptability variable compressive ratio coding and decoding method and the device thereof that interpretation method can't provide the shortcoming of low error.
The digital signal compression is compressed digitized data exactly, reduces data quantity.Use the most general in the compression coding and decoding mode of pulse-code modulation (PCM) now.Pulse-code modulation is by employed " frequency domain " (frequency domain) or " time domain " (time domain) and difference is arranged, and below only sketches explanation with regard to the compression coding and decoding mode of the digital signal of " time domain " kenel.
See also shown in Figure 1A, it is the structure calcspar of the encoder of expression step pulse-code modulation and adaptability step pulse-code modulation framework, Figure 1B then is the structure calcspar of the corresponding decoder of expression, in the step pulse-code modulation coding structure of Figure 1A, be with a quantizer 50, one inverse DCT 60 and a fallout predictor 80 constitute step pulse-code modulation condensing encoder, and after in previous constructions, adding the step adaptation device 70 of dotted line demonstration, promptly change adaptability step pulse-code modulation condensing encoder structure into, this is positioned at inner fallout predictor 80 for supplying to estimate out the size (Px) of next record data, subtract each other (finishing) with input signal (Di) again by subtracter 92, and produce representative error amount (Perr) between the two, in ideal conditions, this error amount should be a trace value, pass through again under the resolution condition of quantizer 50 with the step pitch (Step Size) of " fixing " or " variable " (adapting to device 70 by step finishes) and one set (fixing), it is quantized the back form a compression output code (Code), and be positioned at the inverse DCT 60 of figure right side of face, adder 91 and fallout predictor 80, in fact be one and be same as pulse-code modulation of Figure 1B step or adaptability step pulse-code modulation decoder, and it is arranged in the encoder, it mainly is correctness for reduction confirmation data, this inverse DCT 60 is after receiving compression output code (Code), can carry out inverse quantization and send the Qperr signal with identical resolution condition with identical step (Delta) value, thereafter, again with discreet value (Px) addition (finishing) of fallout predictor 80 loopbacks by adder 91, form the input signal (Qx) of fallout predictor 80, then, repeating aforementioned and input signal (Di) subtracts each other, error amount (Perr) is quantized and the inverse quantization verification step, till finishing.
Though pass through Figure 1A, step among Figure 1B adapts to device 70, can change step (Delta) size of quantizer 50 and inverse DCT 60 at the size of compressing output code (Code), make it under set (fixing) resolution, change the maximin of output, see also shown in Figure 2, for example: the step value of Fig. 2 B is that the 1 step value that changes to Fig. 2 A is under 2 the situation, make peak swing can by ± 2 increase to ± 4, enable to contain bigger amplitude, and reason amplitude burst does not change and produces a large amount of distortions, otherwise, when recording the compression output code and return to standard value, promptly downgrade the step value automatically, avoid according to this causing quantization error to increase because of the step value is excessive.
As described above, can adjust the design of step value along with the compression output code automatically, though can improve because of the excessive problem of input signal amplitude, yet cause quantization error to increase easily, at this point, human desires of the present invention proposes a kind of improvement method of taking into account quantization error and big input amplitude covering scope being provided, and, actively studied innovation, through constantly studying, designing based on abundant practical experience and professional knowledge, and after studying sample and improvement repeatedly, create the present invention finally.
Main purpose of the present invention is, a kind of adaptability variable compressive ratio coding and decoding method and device thereof are provided, make it become a kind of variable compressive ratio coding and decoding method and framework that can change the resolution of quantizer and inverse DCT automatically, make it with high dynamic range and low quantization error according to output code and step value.
Another object of the present invention is to, a kind of adaptability variable compressive ratio coding and decoding method and device thereof are provided, make it in coder, set up a resolution adjustment unit, this resolution adjustment unit is for receiving the output code and the step value signal of coder, and by resolution controlling signal control quantizer and inverse DCT, and can significantly increase (or reduce) at error originated from input and/or be that the step value is when becoming big (or diminishing), increase (or downgrading) quantization resolution in good time, promptly reduce quantization error and solve problem of dtmf distortion DTMF.
The objective of the invention is to realize by following technical scheme.A kind of adaptability variable compressive ratio coding and decoding method according to the present invention proposes is characterized in that this method comprises: a quantization step, for digital input signal is quantized again; One dequantization step is for oppositely being reduced to input signal to the data after quantizing again; One prediction steps is for the result who receives inverse quantization estimates out next record data size; One obtains the step of error amount, for predicting the outcome and actual input signal subtracts each other processing aforesaid, this margin of error that obtains is repeated aforementioned quantification treatment; And a resolution set-up procedure, change the resolution of aforementioned quantification and inverse quantization in real time for the numerical value change of the output code that can send according to quantization step; And in the interpretation method, then constitute to be same as aforementioned inverse quantization, prediction and resolution set-up procedure.
Purpose of the present invention can also further realize by following technical measures.
Aforesaid adaptability variable compressive ratio coding and decoding method, wherein more comprise a step set-up procedure, this step can be sent a step numerical value along with the variation of output code, can be recycled in quantification and the dequantization step with this step numerical value, to change the step value of quantification and inverse quantization.
Aforesaid adaptability variable compressive ratio coding and decoding method, in the wherein said resolution set-up procedure, the step numerical value that can be sent with reference to the step set-up procedure in the lump more is to quantize and the foundation of inverse quantization resolution as adjusting.
Aforesaid adaptability variable compressive ratio coding and decoding method in the wherein said resolution set-up procedure, more includes the comparison MSDS corresponding to the different resolution pattern, is provided as the comparison judgment standard that changes resolution.
Aforesaid adaptability variable compressive ratio coding and decoding method, every data of wherein said relatively MSDS all on should having/the accurate position of lower limit.
Purpose of the present invention is also realized by following technical scheme.A kind of adaptability variable compressive ratio device for encoding and decoding according to the present invention proposes is characterized in that this code device comprises: a quantizer, and input is connected with input signal, and its output is sent a signal of representing output code; One inverse DCT, input is connected with aforementioned output code signal; One fallout predictor, for being connected with the output of inverse DCT, its output is the input position that is fed back to quantizer; And a resolution adjustment unit, its input is connected with the output code signal, and its output is to be made as a resolution control end, can be connected with aforementioned quantizer and inverse DCT, quantizes and inverse quantization resolution with control; And in the code translator, then constitute with identical aforesaid inverse DCT, fallout predictor and resolution adjustment unit.
Purpose of the present invention can also further realize by following technical measures.
Aforesaid adaptability variable compressive ratio device for encoding and decoding, wherein said code device more comprises a step adjuster again, its input is connected with the output code signal, its output is to send the step controlling signal of representing the step value, for being recycled in quantizer and the inverse DCT, to change the step value of quantification and inverse quantization.
Aforesaid adaptability variable compressive ratio device for encoding and decoding, wherein said resolution adjustment unit more are provided with the input of an input step numerical value, in the lump as the reference of adjusting quantification and inverse quantization resolution.
Aforesaid adaptability variable compressive ratio device for encoding and decoding, wherein said resolution adjustment unit more comprises being provided with the comparison MSDS that is in the different resolution pattern, for the comparison judgment standard as change resolution.
Aforesaid adaptability variable compressive ratio device for encoding and decoding, every data of wherein said relatively MSDS all on should having/the accurate position of lower limit.
Aforesaid adaptability variable compressive ratio device for encoding and decoding, wherein said resolution adjustment unit can be made of comparator, counter.
The present invention compared with prior art has tangible advantage and good effect.By above technical scheme as can be known, adaptability variable compressive ratio coding and decoding method of the present invention and device thereof, being characterized in can be along with input signal and measures of dispersion and the variable compressive ratio of real time altering code distinguishability, its concrete structure mainly is to be provided with a resolution adjustment unit that can receive compression data and/or step (delta) signal, can just change and flexibly adjust to quantize and the quantification of inverse DCT and the resolution of inverse quantization according to compression data and/or step numerical value, can reach the effect of the compression coding and decoding of hanging down error in view of the above.The present invention can adjust quantization resolution along with the variation of step value or output code, thereby can solve the excessive problem of deriving of step value and obtain lower quantization error.
In sum, adaptability variable compressive ratio coding and decoding method of the present invention and device thereof, can change the variable compressive ratio coding and decoding method and the framework of the resolution of quantizer and inverse DCT according to output code and step value automatically, and with high dynamic range and low quantization error; It sets up a resolution adjustment unit in coder in addition, this resolution adjustment unit is for receiving the output code and the step value signal of coder, and by resolution controlling signal control quantizer and inverse DCT, and can significantly increase (or reduce) at error originated from input and/or be that the step value is when becoming big (or diminishing), increase (or downgrading) quantization resolution in good time, promptly reduce quantization error and solve problem of dtmf distortion DTMF.No matter it is all having bigger improvement on method, on the structure or on the function, and has than much progress technically, and has produced handy and practical effect, and has the effect of enhancement really, thereby is suitable for practicality more, really is a new and innovative, progressive, practical new design.
Concrete structure of the present invention is provided in detail by following examples and accompanying drawing thereof.
Figure 1A, B are the structure calcspars of existing step pulse-code modulation or adaptability step pulse-code modulation device for encoding and decoding.
Fig. 2 A, B, C are the accurate position schematic diagrames of step and change resolution.
Fig. 3 A, B are the enforcement illustrations that the present invention is applied to adaptability step pulse-code modulation device for encoding and decoding.
Fig. 4 is the cut-away view of resolution adjustment unit of the present invention.
Fig. 5 is the action flow chart of resolution adjustment unit of the present invention.
Fig. 6 A, B are the cut-away views of corresponding quantization of the present invention and inverse DCT.
Fig. 7 is a kind of embodiment oscillogram that input signal of the present invention changes.
Below in conjunction with accompanying drawing and preferred embodiment, the adaptability variable compressive ratio coding and decoding method that foundation the present invention is proposed and install its concrete grammar, structure, feature and effect thereof, describe in detail as after.
The present invention desires to provide a kind of not only can improve the input signal permissible range along with big input signal, and can exempt existing tradition and strengthen the problem that quantization error that step value (Delta) derived increases, and constitute the adaptability variable compressive ratio coding and decoding method and the device of a kind of low quantization error and high input signal permissible range.
That is, the present invention can provide shown in Fig. 2 C, can be when input signal significantly changes, can in time promote quantization resolution (resolution is changed into three bit resolutions by two bit resolutions among Fig. 2 A, the B), so, both made under the step value still maintains 1 situation, still can obtain the covering scope suitable as Fig. 2 A, this measure, significantly change the error that is produced except not only solving input signal, more can under lower step numerical value, form lower quantization error, form a kind of PCM coding and decoding method that the step value changes the quantization error of being derived that solves.
The present invention can change the coding and decoding technology of quantization resolution along with input signal, its practical structures can cooperate consults Fig. 3 A, shown in the B, be respectively the embodiment circuit diagram that is applied to adaptability step PCM coder and adaptability step pulse-code modulation decoder shown in this two figure, with Figure 1A, the B difference be in: increase by a resolution adjustment unit 10, this resolution adjustment unit 10 is one to have two inputs that can be connected with the output code (Code) and step value (Delta) two signals of coder respectively, an and resolution controlling signal output that inputs to quantizer 50 and inverse DCT 60 simultaneously, can change the quantization resolution of quantizer 50 and inverse DCT 60 according to the output code (Code) of aforementioned adaptability step pulse-code modulation coder and step (Delta) numerical value, constitute a kind of structure that changes the resolution of adaptability step pulse-code modulation compression device for encoding and decoding.
Structure as for resolution adjustment unit 10, then can consult a kind of embodiment of Fig. 4, can be by two groups of comparators 11 that are connected with step value and output code signal respectively, 12, one can receive this two comparator 11, on 12 output signals/following counter 13, one with should on/comparator 14 that following counter 13 is connected, the one resolution lifter 15 and that triggered by comparator 14 is formed by the accurate position of the reference generator 16 of resolution output signal control, wherein, this is provided with many group MSDSs with reference to generator 16 inside, accurate position, can be made as shown in following table one, be the inside information chart with reference to accurate position generator of the present invention:
| Resolution | ??4 | ??8 | ??16 | … |
| Quasi position on the Bu Bands | ??14 | ??14 | ??14 | … |
| Quasi position under the Bu Bands | ??6 | ??6 | ??6 | … |
| Lose goes out a yard last Quasi position | ??20 | ??20 | ??20 | … |
| Lose goes out a yard following Quasi position | ??8 | ??8 | ??8 | … |
| Meter counts Quasi position on the device | ??1 | ??2 | ??3 | … |
| Meter counts Quasi position under the device | ??-1 | ??-2 | ??-3 | … |
Table one
Shown in above-mentioned table one, the resolution sizes of sending according to this resolution adjustment unit 10, and provide on the different step/following reference position value, different output code on/following reference position value and counter on/following reference position value, relatively the position is accurate for setting aforementioned three groups of comparators, 11,12,14 required references, and aforementioned set on/down accurate position data, the cushion space that provides a data to differentiate is provided, to avoid misoperation, also the needs of visual actual coding and decoding are adjusted the size of this cushion space, and different operating characteristicss is provided.
See also shown in the action flow chart of resolution lifting of Fig. 5, under initial condition, for example making the initial value of resolution output is 4, and the initial value of counter is under 0 the occasion, the initial accurate bit table of chosen in advance one in step 22 (promptly the resolution of table one is that every data of 4 is to corresponding comparator place), then, judge whether step value or output code that input is sent into are greater than or less than the accurate position of the reference (step 23 that accurate bit table sets, 25), when the accurate position of input surpasses or be lower than with reference to accurate position, make the counter 13 of Fig. 4 be increasing or decreasing (step 24,26) change, the count value of judging counter then is greater than or less than with reference to accurate position (step 27,28), and make resolution increase or downgrade processing (step 271,281), after the resolution lift work is finished, then make the counter 13 of Fig. 4 make zero (step 29), and then reenter in the flow process, the accurate position and the step of carrying out resolution lifting processing selecting corresponding accurate bit table and carry out aforementioned judgement step value or output code according to the resolution situation of this moment are till finishing.So from the above, can provide a kind of effect that can change the resolution controlling signal along with the step value of pulse-code modulation coder or output code state with this motion flow.
This is controlled by the structure of the quantizer and the inverse DCT of resolution controlling signal, can consult A as Fig. 6, shown in the B, promptly portion is provided with many groups corresponding to the quantization table 51～53 of different resolution situation and inverse quantization table 61～63 (in this example only with three groups of quantization tables and inverse quantization table as representative) within it, and the multiplex's task device 54 that is connected with each group quantization table 51～53 or inverse quantization table 61～63,64 form, select different quantization tables through the resolution input signal, formation can be carried out the quantification or the inverse quantization processing of different resolution to input data, and becomes a kind of quantizer and inverse DCT structure of controlled resolution.
Below promptly illustrate the situation that can change quantization resolution of the present invention along with input signal or step value, see also shown in Figure 7, for showing the oscillogram of an adaptability step PCM coder ad-hoc location, in drawing, represent step value (Delta) with black thick line, represent output code (Code), and show error amount (Perr) signal waveform of quantizer input position with fine line with thick dashed line, the longitudinal axis in waveform can be unit voltage, and transverse axis is expression stroke count or time.
Seeing also shown in the following table two, for the present invention dynamically adjusts the embodiment chart of quantization resolution corresponding to Fig. 7 waveform, is that the waveform data corresponding to Fig. 7 changes chart:
| Stroke count | ???1 | ???2 | ???3 | ???4 | ???5 | ???6 | ???7 | ???8 | ???9 | ??10 | ??11 | ??12 | ??13 | ??14 | ??15 | ??16 | |
| Input | Error amount/10) | 17.1 | ??20 | ??22 | ??15 | ??18 | 12.6 | ??28 | ?5.6 | ???7 | ?7.2 | ?5.6 | ???4 | ?5.4 | ???7 | ?6.4 | ?8.1 |
| The step value | ???9 | ??10 | ??11 | ??15 | ??18 | ??14 | ??10 | ???8 | ??14 | ??12 | ???8 | ???5 | ???6 | ???7 | ???8 | ???9 | |
| Output code | ??19 | ??20 | ??20 | ??10 | ??10 | ???9 | ??28 | ???7 | ???5 | ???6 | ???7 | ???8 | ???9 | ??10 | ???8 | ???9 | |
| Accurate position on the step value | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | ??14 | |
| Accurate position under the step value | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | ???6 | |
| Accurate position on the output code | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | ??20 | |
| The accurate down position of output code | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | |
| Counter | ???0 | ???0 | ???0 | ???0 | ???1 | ???0 | ???0 | ???1 | ???0 | ??-1 | ??-2 | ???0 | ??-1 | ??-1 | ??-1 | ??-1 | |
| Accurate position on the counter | ???1 | ???1 | ???1 | ???1 | ???1 | ???2 | ???2 | ???2 | ???2 | ???2 | ???2 | ???1 | ???1 | ???1 | ???1 | ???1 | |
| The accurate down position of counter | ??-1 | ??-1 | ??-1 | ??-1 | ??-1 | ??-2 | ??-2 | ??-2 | ??-2 | ??-2 | ??-2 | ??-1 | ??-1 | ??-1 | ??-1 | ??-1 | |
| Output | Resolution | ???4 | ???4 | ???4 | ???4 | ???4 | ???8 | ???8 | ???8 | ???8 | ???8 | ???8 | ???4 | ???4 | ???4 | ???4 | ???4 |
Table two
In above-mentioned table two, under initial condition, the initial value of resolution is 4, and the initial value of counter is 0, in first to the 3rd document, step value and output code all do not surpass reference position value, so counter still is 0, but when the 4th document, the step value surpasses the upper limit, so the Counter Value in the 5th changed for 1 (adding 1) into, and because the step value of the 5th document also surpasses the upper limit, so counter adds 1 again, at this moment, also surpassed the counter upper limit, therefore, make the resolution in the 6th document rise to 8, and selected in the lump resolution is every reference accurate position data of 8 and makes this counter make zero, for counting processing again, and the advantage of the buffering area that the accurate position of the bound of counter of the present invention is provided, can the 7th of table two can clearly see in to the 11 and, though the output code in the 7th has moment to change in a large number, and makes the count value at the 8th place add 1, right output code moment in the 8th document is reduced to below the lower limit, for again making count value be decremented to 0, provide a suitable buffering and unlikely overreaction, and that the output code numerical value take place is low excessively the 9th to the 11 place continuous four, make count value be decremented to continuously negative below 2, even downgrade 4 automatically, to return to the pattern of low resolution so locate resolution at the 12.
By above-mentioned example as can be known, the invention provides a kind of design that can adjust quantization resolution along with the variation of step value or output code, having constituted one can solve the excessive problem of deriving of step value and obtain the pulse-code modulation coding and decoding method and the structure of low quantization error, really be a tool novelty and the design that meets progressive, though and in the previous example for simultaneously carrying out the adjustment of resolution with reference to the variable condition of step value or output code, yet in the practical application, can optionally only use one as judgment standard, for example: the step of removal Fig. 3 A adapts to device 70 and changes under the step pulse-code modulation compressed encoding framework, resolution adjustment unit 10 of the present invention still can only be adjusted output resolution ratio by the variation situation of output code automatically, also belongs to applicable scope of the present invention.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (11)
1, a kind of adaptability variable compressive ratio coding and decoding method is characterized in that this method comprises:
One quantization step is for quantizing digital input signal again;
One dequantization step is for oppositely being reduced to input signal to the data after quantizing again;
One prediction steps is for the result who receives inverse quantization estimates out next record data size;
One obtains the step of error amount, for predicting the outcome and actual input signal subtracts each other processing aforesaid, this margin of error that obtains is repeated aforementioned quantification treatment; And
One resolution set-up procedure changes the resolution of aforementioned quantification and inverse quantization in real time for the numerical value change of the output code that can send according to quantization step;
And in the interpretation method, then constitute to be same as aforementioned inverse quantization, prediction and resolution set-up procedure.
2, adaptability variable compressive ratio coding and decoding method according to claim 1, it is characterized in that wherein more comprising a step set-up procedure, this step can be sent a step numerical value along with the variation of output code, can be recycled in quantification and the dequantization step with this step numerical value, to change the step value of quantification and inverse quantization.
3, adaptability variable compressive ratio coding and decoding method according to claim 1 and 2, it is characterized in that in the wherein said resolution set-up procedure, the step numerical value that can be sent with reference to the step set-up procedure in the lump more is to quantize and the foundation of inverse quantization resolution as adjusting.
4, adaptability variable compressive ratio coding and decoding method according to claim 3, it is characterized in that in the wherein said resolution set-up procedure, more include comparison MSDS, be provided as the comparison judgment standard that changes resolution corresponding to the different resolution pattern.
5, adaptability variable compressive ratio coding and decoding method according to claim 4, the every data that it is characterized in that wherein said relatively MSDS all on should having/the accurate position of lower limit.
6, a kind of adaptability variable compressive ratio device for encoding and decoding is characterized in that this code device comprises:
One is connected with input signal with input, and output can be sent a quantizer of representing the output code signal;
One inverse DCT that is connected with aforementioned output code signal with input;
One is connected with the output of inverse DCT, and its output is the fallout predictor that feeds back to quantizer input position; And
One is connected with the output code signal with input, and its output is made as a resolution control end and the resolution adjustment unit that can be connected with aforementioned quantizer and inverse DCT;
Code translator is to constitute with identical aforesaid inverse DCT, fallout predictor and resolution adjustment unit again.
7, adaptability variable compressive ratio device for encoding and decoding according to claim 6, it is characterized in that wherein said code device is provided with one again and is connected with the output code signal with input, its output is sent the step adjuster of the step controlling signal of representing the step value.
8,, it is characterized in that wherein said resolution adjustment unit more is provided with the input of an input step numerical value according to claim 6 or 7 described adaptability variable compressive ratio device for encoding and decoding.
9, adaptability variable compressive ratio device for encoding and decoding according to claim 8 is characterized in that wherein said resolution adjustment unit is provided with the comparison MSDS that is in the different resolution pattern.
10, adaptability variable compressive ratio device for encoding and decoding according to claim 9, the every data that it is characterized in that wherein said relatively MSDS all on should having/the accurate position of lower limit.
11, adaptability variable compressive ratio device for encoding and decoding according to claim 6 is characterized in that wherein said resolution adjustment unit can be made of comparator, counter.
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| CNB001303295A CN1141793C (en) | 2000-10-31 | 2000-10-31 | Adaptice encode/decode method with variable compression ratio |
| HK02105722.2A HK1044864B (en) | 2000-10-31 | 2002-08-06 | Adaptive variable compression rate encoding/decoding method & apparatus |
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| CNB001303295A CN1141793C (en) | 2000-10-31 | 2000-10-31 | Adaptice encode/decode method with variable compression ratio |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414962C (en) * | 2005-04-18 | 2008-08-27 | 索尼株式会社 | Image signal processing apparatus, camera system and image signal processing method |
| CN101288312B (en) * | 2005-08-12 | 2010-06-16 | 西门子公司 | Method for correcting a quantized data value and associated device |
| CN102625104A (en) * | 2012-03-26 | 2012-08-01 | 浙江大学 | Video coding method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051844B (en) * | 2006-04-03 | 2011-06-08 | 扬智科技股份有限公司 | Differential pulse code regulation coding method and its device without built-in decoder |
-
2000
- 2000-10-31 CN CNB001303295A patent/CN1141793C/en not_active Expired - Fee Related
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2002
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414962C (en) * | 2005-04-18 | 2008-08-27 | 索尼株式会社 | Image signal processing apparatus, camera system and image signal processing method |
| CN101288312B (en) * | 2005-08-12 | 2010-06-16 | 西门子公司 | Method for correcting a quantized data value and associated device |
| CN102625104A (en) * | 2012-03-26 | 2012-08-01 | 浙江大学 | Video coding method |
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| Publication number | Publication date |
|---|---|
| HK1044864B (en) | 2004-07-09 |
| HK1044864A1 (en) | 2002-11-01 |
| CN1141793C (en) | 2004-03-10 |
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