CN102341845A - Method and apparatus for processing audio data - Google Patents
Method and apparatus for processing audio data Download PDFInfo
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Abstract
Disclosed herein is a method and apparatus for processing audio data. The method of processing audio data comprises loading previous accumulation data and any one of pieces of channel data from memory, operating the loaded channel data using a down-mix coefficient corresponding to the loaded channel data, determining whether the loaded channel data are last input channel data for configuring output channel data, and if, as a result of the determination, the loaded channel data are determined to be the last input channel data, operating the operated channel data and the previous accumulation data using a window coefficient. Accordingly, the down-mix and windowing processes can be integrally performed.
Description
Technical field
The present invention relates to a kind of voice data disposal route, relate more specifically to a kind of following the following of (down mix) and window (windowing) that mix that can integrate the channel data that execution receives and mix and the processing correlation technique of windowing.
Background technology
Recently, in order to offer the more high-quality audio service that presence is arranged of user, exploitation has the digital rings of the various multiplex (MUX)s that surpassed existing 1 channel (for example, monophony) or 2 channels (for example, stereo) audio format around audio format.For example, Doby AC3 (Dolby AC3), DTS (Digital Theater System, Digital Theater System) etc. are arranged is that the above multiplex (MUX) digital rings of 5.1 channels is around audio format to representational example.
Forms such as above-mentioned Doby AC3, DTS be originally presence is arranged in the arenas to show a film be the multiplex (MUX) developed of purpose around audio format, and currently be widely used in various media, for example DVD, CD, videodisc, digital broadcasting etc.Thus, in general family, as long as possess the audio system that can support corresponding multiplex (MUX) around audio format, for example home theater (Home Theater), DVD/Divx player etc., anyone can both the uppick high-quality around sound.
But, on the other hand, have the more situation that can't support multiplex (MUX) in the audio system that actual individual is possessed around audio format.Particularly, generally use portable equipments such as mobile communication terminal recently, above-mentioned portable equipment is not suitable for output around sound on its equipment energy characteristic.Therefore in the case, it is technological to develop tonequality improvements of the audio system that is used for not supporting multiplex (MUX).
Mix down being meant, mix the voice data of a plurality of channels and convert the technology of the voice data of the channel that is less than its channel number into.For example, load in mixture under and put the voice data that can descend to mix the voice data of 5.1 channels and convert 2 channels (or 1 channel) into.At this moment, because the voice data of above-mentioned 2 channels (or 1 channel) comprises the composition of the voice data of 5.1 channels, therefore utilize the audio system of 2 channels (or 1 channel) can play the sound equipment of high-quality more.
Usually, possessing the existing audio system of the mixed function of this time, after encoding by different channels from the bit stream of outside input, is data in time domain with the data-switching of the frequency domain of numeralization, the data in time domain of conversion is aimed at delivery channel descend to mix.And existing audio system is through carrying out (Windowing) process of windowing will descend mixed data to multiply by the window coefficient, thereby generates voice data such as PCM (Pulse Code Modulation, pulse code modulation (PCM)) data.
As stated, this existing audio system branch that will descend to mix to window is carried out with different processes.For example, under sneak out in the journey, the data storage of a plurality of channels of input on storer, after handling by the data of different channel load store successively, is stored in it on storer again.Subsequently, in the process of windowing, the data of mixing under the obtaining of storing in the pseudostatic ram multiply by the window coefficient and with its output.
But, in above-mentioned existing technology, have under sneak out journey and the process of windowing in reference-to storage too continually, cause the too much problem of operand.This be because under sneak out journey and the process of windowing in, on the characteristic of its processor, the process of storage again after carrying out repeatedly handling from the memory load data and with it.Therefore, need develop the new technology that to simplify mixed down and the process of windowing in a hurry.
Summary of the invention
The object of the present invention is to provide a kind of voice data disposal route and device, in the present invention, when processing audio data, integrate to carry out and mix down and window, the visit that can reduce storer also reduces operand significantly.
In order to solve this technical task, one aspect of the present invention provides a kind of voice data disposal route.Above-mentioned voice data disposal route following steps: the step of any channel data from a plurality of channel datas of memory load and cumulative data before; Use and above-mentioned step of coming the channel data of the above-mentioned warp loading of computing through the corresponding mixed coefficient down of the channel data that loads; Judge that whether above-mentioned be the step that is used to constitute the last input channel data of delivery channel data through the channel data that loads; And above-mentioned when the channel data that loads is above-mentioned last input channel data, then use the window coefficient come to the above-mentioned channel data that calculates and above-mentioned before the cumulative data step of carrying out computing.
Above-mentioned voice data disposal route also comprises the steps: above-mentioned when the channel data that loads is not above-mentioned last input channel data, with the add step of the cumulative data before above-mentioned of the above-mentioned channel data that calculates; And with the above-mentioned step that arrives above-mentioned storer through the data storage that adds.And above-mentioned voice data disposal route also comprises the steps: the step of the data storage of using above-mentioned window coefficient to calculate to specific register.
Use above-mentioned window coefficient come to the above-mentioned channel data that calculates and above-mentioned before the cumulative data step of carrying out computing comprise the steps: the add step of the cumulative data before above-mentioned of the above-mentioned channel data that calculates; Step from above-mentioned memory fetch window coefficient; And the step that above-mentioned window coefficient multiply by the above-mentioned data that calculate.
The step of above-mentioned any channel data from a plurality of channel datas of memory load and cumulative data before comprises the steps: a plurality of channel samples that are contained in above-mentioned arbitrary channel data are stored into the step of a plurality of registers.
In addition, in order to solve technical task of the present invention, another aspect of the present invention provides a kind of audio-frequency data processing device.Above-mentioned audio-frequency data processing device comprises: storer, and it is used for canned data; And operational part; Its any channel data from a plurality of channel datas of above-mentioned memory load and cumulative data before; Using down, mixed coefficient comes the above-mentioned channel data through loading of computing; Whether through the channel data that load be the last input channel data that are used to constitute delivery channel, above-mentioned when the channel data that loads is above-mentioned last input channel data if judging above-mentioned, then use the window coefficient come to the above-mentioned channel data that calculates and above-mentioned before cumulative data carry out computing.
Above-mentioned when the channel data that loads is not last input channel data, the above-mentioned operational part above-mentioned cumulative data before that will the above-mentioned channel data that calculates adds, and store above-mentioned storer into.
Above-mentioned when the channel data that loads is above-mentioned last input channel data, the above-mentioned operational part above-mentioned cumulative data before that will the above-mentioned channel data that calculates adds, and the window coefficient multiply by this data through adding.
Above-mentioned memory stores have in following following mixed coefficient table and the window coefficient table at least any: following mixed coefficient table, it comprises the following mixed coefficient of each channel of correspondence that above-mentioned a plurality of channel datas are descended to mix; And the window coefficient table, it comprises the window coefficient that is used for through descending mixed data to window.
Above-mentioned channel data through loading comprises a plurality of channel samples.At this moment, above-mentioned operational part comprises a plurality of registers that are used to store above-mentioned a plurality of channel samples.
As stated,, when the following mixed computing of carrying out to the last input channel data that are used to constitute delivery channel, carry out simultaneously and window, mix down and window thereby can integrate to carry out according to the present invention.Thus, have and in descending mixed and the process of windowing, farthest to reduce the visit of storer, and significantly reduce the advantage of operand.
Description of drawings
Fig. 1 is the block diagram that the audio system that comprises audio-frequency data processing device of expression exemplary embodiment of the present constitutes;
Fig. 2 is the block diagram of the formation of the data processing division that illustrates in the presentation graphs 1;
Fig. 3 is the process flow diagram that expression is used for the computing flow process of the operational part that the declarative data handling part comprises;
Fig. 4 is the process flow diagram that expression is used to explain the voice data disposal route of another exemplary embodiment of the present invention; And
Fig. 5 is that expression is used to explain the present invention's process flow diagram of the voice data disposal route of an exemplary embodiment again.
Embodiment
Below, in order to let those skilled in the art in the invention's embodiment of the present invention easily, exemplary embodiment of the present invention is elaborated with reference to accompanying drawing.In the exemplary embodiment of the present invention of following explanation, use specific technical term in order to ensure the definition of content.But should be appreciated that the present invention is defined in specific term, each particular term comprises all technological synonyms that move through similar mode in order to reach similar purpose.
Fig. 1 is the block diagram that the audio system that comprises audio-frequency data processing device of expression exemplary embodiment of the present constitutes.
As shown in Figure 1, audio system 100 can be carried out by frame (Frame) unit and receive through bitstream encoded (Bit Stream), and it is handled the function of output result in back as sound signal.Above-mentioned audio system 100 can be made up of the form of portable equipments such as mobile communication terminal, also can be traditional fixed systems such as digital high-fidelity (Digital Hi-Fi) system.
Above-mentioned audio system 100 comprises lsb decoder 10, territory converter section 20, data processing division 30 and audio output part 40.
Above-mentioned lsb decoder 10 press frame unit receive from outside input through bitstream encoded, with the voice data of its decoding and output frequency domain.For example, comprise the data of frequency domain in the above-mentioned bit stream through the individual channel of N (N is the integer more than 2) of coding.Above-mentioned lsb decoder 10 is by different this bit streams of channel-decoding, and the voice data of the frequency domain of N channel of output.
For example, data processing division 30 uses mixed coefficient down by each channel computing N channel data successively and use mixed coefficient down to come computing to be used to constitute the data of the last input channel of delivery channel, to accumulated result execution windowing operations.This data processing division 30 will be carried out down M the delivery channel data storage of mixing and the windowing specific register to audio output part 40, for example in the PCM buffer etc.
Fig. 2 is the block diagram of the formation of the data processing division 30 that illustrates in the presentation graphs 1.
Referring to figs. 1 through Fig. 2, N the channel data that data processing division 30 execution receive the converter section 20 from the territory descends to mix and windows, and the function of M delivery channel data of output.As shown in Figure 2, this data processing division 30 comprises storer 36 and operational part 31 etc.
And, the following required following mixed coefficient table in the mixed computing of storage in the storer 36, required window coefficient table in the windowing operations.Above-mentioned down mixed coefficient table is that the following mixed coefficient that is used to multiply by each channel data when mixing computing down is according to the morphotic information of form.And, the window coefficient table be with the corresponding window coefficient of the window type that is applicable to frame according to the morphotic information of form.
This operational part 31 comprises ALU (ALU:Arithmetic Logic Unit) 33 and the register portion 34 that is used to carry out computing.Above-mentioned ALU 33 is controlled down according to mixed under above-mentioned and Intensified Arithmetic of ICT and is mixed and the process of windowing.Comprise in the above-mentioned register portion 34 and be used for a plurality of registers of when the computing action of ALU 33, using.
Above-mentioned operational part 31 loads any channel data and cumulative data before N the channel data from storer 36; Using down, mixed coefficient comes computing behind the channel data that loads, to judge whether the channel data that above-mentioned warp loads is the last input channel data that are used to constitute delivery channel.
At this moment, above-mentioned when the channel data that loads is above-mentioned last input channel data, operational part 31 uses the window coefficients to calculate by the channel data of computing and the cumulative data before loading.On the contrary, above-mentioned when the channel data that loads is not above-mentioned last input channel data, operational part 31 with the channel data that generates and before cumulative data add, and store storer 36 into.
In addition, operational part 31 compares the number (being the input channel number) of the input channel data number M with delivery channel, with decision N channel data of input is carried out and is mixed down and window, and still only an execution is windowed.
Fig. 3 is the process flow diagram that is used to explain the computing flow process of this operational part 31, and it representes voice data disposal route according to an exemplary embodiment of the present invention.
Referring to figs. 1 through Fig. 3, at first, operational part 31 reaches cumulative data (step S1) before from the data that storer 36 loads any channel N the channel data.Above-mentioned channel data comprises a plurality of channel samples.For example, operational part 31 reference-to storage 36 and transfer a plurality of channel samples that comprise in above-mentioned any channel data after, be stored to register portion 34.At this moment, the corresponding channel samples of storage in each register of register portion 34.
Then, mixed coefficient came the above-mentioned channel data (step S2) through loading of computing under operational part 31 used.For example, the following mixed coefficient table of storage in operational part 31 search memories 36 extracts and the corresponding mixed coefficient down of above-mentioned channel data through loading, this following mixed coefficient that extracts multiply by each channel samples of storage in the register portion 34.
Follow again, operational part 31 judge above-mentioned through the channel data that loads whether for being used to constitute the last input channel data (step S3) of delivery channel (that is any delivery channel in M delivery channel).Following mixed order of operation to N channel data is set in advance by the following mixed Intensified Arithmetic of ICT that reaches.Thus, operational part mixes order of operation below 31 be the basis, judges whether current channel data through loading is last input channel data.
For example; N channel data supposing input is 5 channel datas; For example be that a left side (Left) channel data, central authorities (Center) channel data, the right side (Right) channel data, a left side are around (Left Surround) channel data and right around (Right Surround) channel data; And suppose that a plurality of delivery channel data are 2 channel datas; When for example being a left side (L) delivery channel data and the right side (R) delivery channel data; Then above-mentioned mixing down and Intensified Arithmetic of ICT, for example in order to constitute above-mentioned left delivery channel data, indication operational part 31 is carried out according to above-mentioned left channel data, center channel data, a left side around channel data, right computing around mixed coefficient under the using in order of channel data.In the case, operational part 31 confirms whether current channel data through loading is right around channel data, thereby judges whether the channel data that above-mentioned warp loads is the last input channel data that are used to constitute left delivery channel data.
In above-mentioned judgement, above-mentioned is when being used to constitute the last input channel data of delivery channel through the channel data that loads, operational part 31 use the window coefficients come computing use above-mentioned mixed coefficient computing down channel data and before cumulative data (step S4).For example; Cumulative data before the above-mentioned mixed coefficient down of operational part 31 uses adds the channel data that calculates to; The window coefficient table of storage in the search memory 36, extract with the corresponding corresponding window coefficient of frame after, the window coefficient that extracts multiply by above-mentioned cumulative data through adding.And, operational part 31 with the data storage of above-mentioned windowing operations to specific register, PCM buffer etc. for example, thus with data transmission to audio output part 40.
In addition; In above-mentioned judgement; Above-mentioned is not when being used to constitute the last input channel data of delivery channel through the channel data that loads; Cumulative data before the above-mentioned mixed coefficient down of operational part 31 uses adds the channel data that calculates to stores this into storer 36 (step S5) through the cumulative data that adds.Operational part 31 together loads the cumulative data and next channel data in proper order that are stored in this moment in the storer 36 as cumulative data before.
As stated, voice data disposal route according to an exemplary embodiment of the present invention when the last input channel data that are used to constitute delivery channel following mixed, is carried out windowing operations simultaneously.Therefore, have the visit that can reduce storer significantly, reduce the advantage of operand.
Below, another exemplary embodiment of the present invention is described.At first; In this embodiment; Suppose 5 channel datas of input, for example left channel data, center channel data, right channel data, a left side be around channel data and right around channel data, and it is descended to mix and windows; And export 2 delivery channel data, for example left delivery channel data and right delivery channel data.
Fig. 4 is the process flow diagram that expression is used to explain the voice data disposal route of another exemplary embodiment of the present invention; It illustrates 4 channels removing the right channel data from 5 channel datas of outside input is descended to mix and window, and exports the step of left delivery channel data.At this moment, be assumed to be the mixed down Intensified Arithmetic of ICT that reaches of basis and handle above-mentioned 4 channel datas around the channel data and the right side successively around the order of channel data with left channel data, center channel data, a left side.
As shown in Figure 4, at first, the left channel data (step S11) that operational part 31 loads as first channel data that will handle from storer 36.For example, operational part 31 is transferred the channel samples that comprises in the left channel data of storage in the storer 36, and stores register portion 34 into.In the case, because above-mentioned left channel data are first channel data that will handle, so cumulative data does not before then exist.
Then, operational part 31 multiply by left channel data (step S12) from mixing the corresponding mixed coefficient down of the left channel data that extract and load the coefficient table down with the following mixed coefficient that extracts.For example, operational part 31 will descend to mix each channel samples that coefficient multiply by storage in the register portion 34 respectively.
Then; Operational part 31 judges whether above-mentioned left channel data are the last input channel data that are used to constitute left delivery channel data; Promptly right around channel data; Because the left channel data are not last input channel data, therefore store above-mentioned left channel data into storer 34 (step S13) as first cumulative data.
This step S11 is represented then following mathematical expression 1 with mathematical expression to the process of step S13:
(mathematical expression 1)
P1[0，1，2，...，k]＝a×L[0，1，2，...，k]
At this moment, above-mentioned L [0,1,2 ...; K] expression has the left channel data of the individual channel samples of k (k is the integer 2 or more), and a representes and corresponding time mixed coefficient of left channel data that P1 [0,1; 2 ..., k] expression uses the left channel data of mixed coefficient computing, i.e. first cumulative data down.
To step S13,1 action from the memory load data takes place at this step S11,1 action to memory stores data.At this moment, the unit of k channel samples is all handled in 1 expression.
Then, operational part 31 loads center channel data and cumulative data (that is first cumulative data) (step S14) before as second channel data that will handle from storer 36.For example, operational part 31 is transferred the channel samples that comprises in the center channel data of storing in the storer, and stores register portion 34 into.
Then, operational part 31 from mix coefficient table down, extract with from the corresponding mixed coefficient down of the center channel data of memory load, the following mixed coefficient that extracts multiply by center channel data (step S15).For example, operational part 31 will descend to mix coefficient and multiply by each channel samples of storing in the register portion respectively.
Then; Operational part 31 judges whether above-mentioned center channel data are the last input channel data that are used to constitute left delivery channel data; Promptly right around channel data; Because the center channel data are not last input channel data, therefore, will store storer 36 (step S16) into as second cumulative data through the data that add with above-mentioned center channel data above-mentioned first cumulative data that adds.
This step S14 is represented then following mathematical expression 2 with mathematical expression to the process of step S16:
(mathematical expression 2)
P2[0，1，2，...，k]＝P1[0，1，2，...，k]+b×C[0，1，2，...，k]
At this moment, above-mentioned C [0,1,2 ...; K] expression has the center channel data of k channel samples, and b representes and corresponding time mixed coefficient of center channel data that P1 [0,1,2; ..., k] expression first cumulative data, P2 [0,1; 2 ..., k] represent to use down mixed coefficient to come the center channel data of computing and the data that first cumulative data adds, i.e. second cumulative data.
To step S16,2 actions from the memory load data take place at this step S14,1 action to memory stores data.
Then, operational part 31 reaches cumulative data (that is second cumulative data) (step S17) before from the left side that storer 36 loads as the 3rd channel data that will handle around channel data.For example, operational part 31 is transferred the left side of storage in the storer 36 around the channel samples that comprises in the channel data, and stores register portion 34 into.
Then, a left side multiply by around channel data (step S18) around the corresponding mixed coefficient down of channel data with the following mixed coefficient that extracts in the left side that operational part 31 extracts and loads from mix coefficient table down.For example, operational part 31 will descend to mix each channel samples that coefficient multiply by storage in the register portion 34 respectively.
Then; Operational part 31 judges whether an above-mentioned left side is the last input channel data that are used to constitute left delivery channel data around channel data; Promptly right around channel data; Because a left side is not last input channel data around channel data, therefore with an above-mentioned left side around channel data above-mentioned second cumulative data that adds, will store storer 36 (step S19) into as the 3rd cumulative data through the data that add.
This step S17 is represented then following mathematical expression 3 with mathematical expression to the process of step S19:
(mathematical expression 3)
P3[0，1，2，...，k]＝P2[0，1，2，...，k]+c×Ls[0，1，2，...，k]
At this moment, above-mentioned Ls [0,1,2 ...; K] expression have k channel samples a left side around channel data, c representes to descend mixed coefficient with a left side around channel data is corresponding, P2 [0,1,2; ..., k] expression second cumulative data, P3 [0,1; 2 ..., k] the expression data that will use down a left side that mixed coefficient comes computing to add, i.e. the 3rd cumulative data around channel data and second cumulative data.
To step S19,2 actions from the memory load data take place at this step S17,1 action to memory stores data.
Then, operational part 31 reaches cumulative data (that is the 3rd cumulative data) (step S20) before from the right side that storer 36 loads as the 4th channel data that will handle around channel data.For example, operational part 31 is transferred the right side of storing in the storer around the channel samples that comprises in the channel data, and stores register portion 34 into.
Then, the right side that operational part 31 extracts and loads from mix coefficient table down multiply by the following mixed coefficient that extracts right around channel data (step S21) around the corresponding mixed coefficient down of channel data.For example, operational part 31 will descend to mix each channel samples that coefficient multiply by storage in the register portion 34 respectively.
Then; Operational part 31 judges whether the above-mentioned right side is the last input channel data that are used to constitute left delivery channel data around channel data; Promptly right around channel data; Because right is last input channel data around channel data, therefore with the above-mentioned right side around channel data above-mentioned the 3rd cumulative data that adds, and use the window coefficient to come the data (step S22) of computing through adding.For example, operational part 31 multiply by the window coefficient and uses the right side that mixed coefficient down the calculates value around channel data and the 3rd cumulative data addition.
This step S20 is represented then following mathematical expression 4 with mathematical expression to the process of step S22:
(mathematical expression 4)
Pout[0，1，2，...，k]＝(P3[0，1，2，...，k]+d×Rs[0，1，2，...，k])×W[0，1，2，...，k]
At this moment, above-mentioned Rs [0,1,2 ..., k] expression have k channel samples the right side around channel data; D representes with right around the corresponding mixed coefficient down of channel data, and P3 [0,1,2 ..., k] expression the 3rd cumulative data; W [0,1,2 ..., k] expression window coefficient; Pout [0,1,2 ..., k] be illustrated in the data (being the left channel output data) that the value that the right side of using mixed coefficient down to calculate is added around channel data and the 3rd cumulative data multiply by the window coefficient again.
To step S22,3 actions from the memory load data take place at this step S20,1 action to memory stores data.
Above with reference to Fig. 4, explain 4 channel datas are descended to mix and window and export the process of left channel output data.In said process, totally 8 times have been taken place from the action of storer 36 loading datas and totally 4 actions to storer 36 storage data.Under the situation of prior art; Because mixed step is distinguished with the step of windowing separately fully down; Therefore carrying out 4 channel datas being mixed down and window and when exporting the process of left channel output data, the visit of the storer 36 that generation is more of exemplary embodiment of the present.For example, under the situation of prior art,, store result data into storer, when windowing, the data of storage are loaded again, thereby the visit of unnecessary storer takes place mixing down when finishing.
Fig. 5 is that expression is used to explain the present invention's process flow diagram of the voice data disposal route of an exemplary embodiment again; It illustrates 4 channels removing the left channel data from 5 channel datas of outside input is descended to mix and window, and exports the step of right delivery channel data.At this moment, be assumed to be the mixed down Intensified Arithmetic of ICT that reaches of basis and handle above-mentioned 4 channel datas around the channel data and the right side successively around the order of channel data with right channel data, center channel data, a left side.
As shown in Figure 5,4 channel datas are descended to mix and window and export the step of right delivery channel data, will carry out with the notion identical with the step of the left delivery channel data of foregoing output.
Then, operational part 31 loads a left side around channel data (step S37), after the computing of mixed coefficient (step S38), because a left side is not last input channel data around channel data, so stores the 3rd cumulative data into storer 36 (step S37) under execution is used.Then; Operational part 31 loads right around channel data (step S40); After the computing of the following mixed coefficient of execution use (step S41); Confirming right is last input channel data around channel data, after the right side of using mixed coefficient computing is down added around channel data and the 3rd cumulative data, uses the window coefficient to come this is carried out computing (step S42) through the data that add.
Abovely describe the present invention with reference to actual example property embodiment; But the those skilled in the art under the present invention are to be understood that; The invention is not restricted to the embodiment that disclosed; But in the scope that does not exceed technological thought of the present invention and accompanying claims, comprise multiple modification and be equal to setting.
Claims (12)
1. a voice data disposal route is characterized in that, comprises the steps:
The step of any channel data from a plurality of channel datas of memory load and cumulative data before;
Use and said step of coming the channel data of the said warp loading of computing through the corresponding mixed coefficient down of the channel data that loads;
Judge that whether said be the step that is used to constitute the last input channel data of delivery channel data through the channel data that loads; And
Said when the channel data that loads is said last input channel data, then use the window coefficient come to the said channel data that calculates and said before the cumulative data step of carrying out computing.
2. method according to claim 1 is characterized in that, also comprises the steps:
Said when the channel data that loads is not said last input channel data, with the add step of the cumulative data before said of the said channel data that calculates; And
With the said step that arrives said storer through the data storage that adds.
3. method according to claim 1 is characterized in that, use said window coefficient come to the said channel data that calculates and said before the cumulative data step of carrying out computing comprise the steps:
With the add step of the cumulative data before said of the said channel data that calculates;
Step from said memory fetch window coefficient; And
Said window coefficient multiply by the said step that adds the data of calculating.
4. method according to claim 1 is characterized in that, the step of said any channel data from a plurality of channel datas of memory load and cumulative data before comprises the steps:
The a plurality of channel samples that are contained in said any channel data are stored into the step of a plurality of registers.
5. method according to claim 4 is characterized in that, the corresponding said mixed coefficient down of the channel data that use and said warp load comes the step of the channel data of the said warp loading of computing to comprise:
From said memory fetch and said through the corresponding step of mixed coefficient down of the channel data that loads; And
The said following mixed coefficient that is extracted multiply by the step that is contained in each channel samples in the said register respectively.
6. method according to claim 1 is characterized in that, also comprises the steps:
With the step of the data storage of using said window coefficient to calculate to specific register.
7. an audio-frequency data processing device is characterized in that, comprising:
Storer, it is used for canned data; And
Operational part; Its any channel data from a plurality of channel datas of said memory load and cumulative data before; Using down, mixed coefficient comes the said channel data through loading of computing; Whether through the channel data that load be the last input channel data that are used to constitute delivery channel, said when the channel data that loads is said last input channel data if judging said, then use the window coefficient to come said channel data that calculates and said cumulative data before loading are carried out computing.
8. device according to claim 7 is characterized in that, and is said when the channel data that loads is not last input channel data, the said operational part said cumulative data before that will the said channel data that calculates adds, and store said storer into.
9. device according to claim 7; It is characterized in that; Said when the channel data that loads is said last input channel data, the said operational part said cumulative data before that will the said channel data that calculates adds, and the window coefficient multiply by this data through adding.
10. device according to claim 7 is characterized in that, said memory stores have in the down mixed coefficient table and window coefficient table at least any:
Following mixed coefficient table, it comprises the following mixed coefficient of each channel of correspondence that said a plurality of channel datas are descended to mix; And
The window coefficient table, it comprises the window coefficient that is used for through descending mixed data to window.
11. device according to claim 7 is characterized in that,
Said channel data through loading comprises a plurality of channel samples;
Said operational part comprises a plurality of registers that are used to store said a plurality of channel samples.
12. device according to claim 7 is characterized in that, said operational part will multiply by said channel data through loading through the corresponding mixed coefficient down of the channel data that loads with said.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2009-0018624 | 2009-03-04 | ||
| KR1020090018624A KR101078379B1 (en) | 2009-03-04 | 2009-03-04 | Method and Apparatus for Processing Audio Data |
| PCT/KR2010/001276 WO2010101381A2 (en) | 2009-03-04 | 2010-03-02 | Method and apparatus for processing audio data |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102341845A true CN102341845A (en) | 2012-02-01 |
| CN102341845B CN102341845B (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800103099A Expired - Fee Related CN102341845B (en) | 2009-03-04 | 2010-03-02 | Method and apparatus for processing audio data |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2012519310A (en) |
| KR (1) | KR101078379B1 (en) |
| CN (1) | CN102341845B (en) |
| WO (1) | WO2010101381A2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6128597A (en) * | 1996-05-03 | 2000-10-03 | Lsi Logic Corporation | Audio decoder with a reconfigurable downmixing/windowing pipeline and method therefor |
| KR20000073030A (en) * | 1999-05-04 | 2000-12-05 | 김영환 | Device for overlapping and adding window in AC-3 decoder |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02294200A (en) * | 1989-05-09 | 1990-12-05 | Mitsubishi Electric Corp | Sound receiver |
| JPH06165079A (en) * | 1992-11-25 | 1994-06-10 | Matsushita Electric Ind Co Ltd | Down mixing device for multichannel stereo use |
| JP3761639B2 (en) * | 1995-09-29 | 2006-03-29 | ユナイテッド・モジュール・コーポレーション | Audio decoding device |
| JP2001298680A (en) * | 2000-04-17 | 2001-10-26 | Matsushita Electric Ind Co Ltd | Specification of digital broadcasting signal and its receiving device |
| JP2004109362A (en) * | 2002-09-17 | 2004-04-08 | Pioneer Electronic Corp | Apparatus, method, and program for noise removal of frame structure |
| JP5635502B2 (en) * | 2008-10-01 | 2014-12-03 | ジーブイビービー ホールディングス エス．エイ．アール．エル． | Decoding device, decoding method, encoding device, encoding method, and editing device |
-
2009
- 2009-03-04 KR KR1020090018624A patent/KR101078379B1/en not_active IP Right Cessation
-
2010
- 2010-03-02 WO PCT/KR2010/001276 patent/WO2010101381A2/en active Application Filing
- 2010-03-02 JP JP2011552879A patent/JP2012519310A/en active Pending
- 2010-03-02 CN CN2010800103099A patent/CN102341845B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6128597A (en) * | 1996-05-03 | 2000-10-03 | Lsi Logic Corporation | Audio decoder with a reconfigurable downmixing/windowing pipeline and method therefor |
| KR20000073030A (en) * | 1999-05-04 | 2000-12-05 | 김영환 | Device for overlapping and adding window in AC-3 decoder |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010101381A2 (en) | 2010-09-10 |
| JP2012519310A (en) | 2012-08-23 |
| CN102341845B (en) | 2013-06-12 |
| KR20100099998A (en) | 2010-09-15 |
| KR101078379B1 (en) | 2011-10-31 |
| WO2010101381A3 (en) | 2010-11-18 |
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