CN105828272A - Audio signal processing method and apparatus - Google Patents
Audio signal processing method and apparatus Download PDFInfo
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- CN105828272A CN105828272A CN201610278908.8A CN201610278908A CN105828272A CN 105828272 A CN105828272 A CN 105828272A CN 201610278908 A CN201610278908 A CN 201610278908A CN 105828272 A CN105828272 A CN 105828272A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels
Abstract
The invention relates to the field of data processing, and discloses an audio signal processing method and an apparatus. The method comprises the following steps: S1. determining a sound source type of pulse code modulation PCM data; and S2. based on the determined sound source type, determining whether to conduct post-processing by selecting Dolby post-processing, Dirac post-processing, or Hi-Fi post-processing. According to the invention, the method can identify the sound source data to which the PCM data belong is Dolby, Dirac or Hi-Fi, so that proper post-processing technique can be adopted in conducting post-processing on the PCM data.
Description
Technical field
The present invention relates to data processing field, in particular it relates to a kind of acoustic signal processing method and device.
Background technology
Dolby Pro-logic (Dolby Pro Logic) is the surround sound of Doby company of U.S. exploitation
System.Dirac refers to " Dirac HD", its be Sweden Dirac Research AB company and
A kind of audio frequency Fidelity technology that Uppsala Univ Sweden develops, this audio frequency Fidelity technology can be by optimizing
The performance of audio system, promotes the reducing power of audio system, fundamentally improves tonequality.High-fidelity
(Hi-Fi) post processing is a kind of HD Audio treatment technology that high-pass platform system is had self.
But, when by Dolby technology, Dirac technology in high-pass platform system integrated after, due to
The sound source data of the Hi-Fi post-processing technology that high-pass platform system is had self uses pulse code
Modulation (PCM) data, and the compression sound source data of Dolby, Dirac is all decoded into PCM number
According to, and these PCM data are all to carry out post processing in the DSP module of high-pass platform system, because of
This this make the sound source data belonging to these PCM data of DSP module None-identified of high-pass platform system
It is Dolby, Dirac or Hi-Fi, thus suitable post-processing technology also cannot be used these PCM
Data carry out post processing.
Summary of the invention
It is an object of the invention to provide a kind of acoustic signal processing method and device, it is capable of identify that PCM
Sound source data belonging to data is Dolby, Dirac or Hi-Fi such that it is able to place after using suitably
Reason technology carries out post processing to these PCM data.
To achieve these goals, the present invention provides a kind of acoustic signal processing method, and the method includes:
Step S1, determine the source of sound type of pulse code modulation PCM data；And step S2, based on really
Fixed source of sound type determines that selection Dolby post processing, Dirac post processing or Hi-Fi post processing are entered
Row post processing.
Preferably, in step sl, determine based on the header information in described PCM data described
The source of sound of PCM data is the sound that Dolby source of sound, Dirac source of sound or high-pass platform system self provides
Source.
Preferably, the method also includes: after step S1, and determined by general, source of sound type is as ginseng
Number adds in described PCM data.
Preferably, described Dolby post processing is come by Dolby audio frequency general post processing (COPP) module
Completing, described Dirac post processing is completed by Dirac COPP module.
The present invention also provides for a kind of audio signal processor, and this device includes: source of sound determination type module,
For determining the source of sound type of pulse code modulation PCM data；And post processing selects module, it is used for
Source of sound type determined by based on determines selection Dolby post processing, Dirac post processing or Hi-Fi
Post processing carries out post processing.
Preferably, described source of sound determination type module comes really based on the header information in described PCM data
The source of sound of fixed described PCM data is that Dolby source of sound, Dirac source of sound or high-pass platform system carry self
The source of sound of confession.
Preferably, described source of sound determination type module be additionally operable to using determined by source of sound type add as parameter
It is added in described PCM data.
Preferably, this device also includes: Dolby audio frequency general post processing (COPP) module, for complete
Become described Dolby post processing；And Dirac COPP module, it is used for described Dirac post processing.
Preferably, described source of sound determination type module is positioned at ccf layer.
Preferably, described post processing selects module to be positioned at hardware abstraction layer.
By technique scheme, owing to can determine the source of sound of PCM data according to the technology of the present invention
Type, and based on determined by source of sound type determine be select Dolby post processing, Dirac post processing
Or Hi-Fi post processing carries out post processing, therefore it is capable of identify that the sound source data belonging to PCM data is
Dolby, Dirac or Hi-Fi such that it is able to use suitable post-processing technology to these PCM data
Carry out post processing, and achieve Dolby, Dirac and Hi-Fi post-processing technology in such as high-pass platform system
Coexisting on the platforms such as system.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with
Detailed description below is used for explaining the present invention together, but is not intended that limitation of the present invention.?
In accompanying drawing:
Fig. 1 is the flow chart of the acoustic signal processing method according to one embodiment of the present invention；
Fig. 2 is the schematic block diagram of the audio signal processor according to one embodiment of the present invention；And
Fig. 3 is the schematic block diagram of the audio signal processor according to a further embodiment of this invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that
Detailed description of the invention described herein is merely to illustrate and explains the present invention, is not limited to the present invention.
The present invention provides a kind of acoustic signal processing method, as it is shown in figure 1, the method can include following
Step:
Step S1, determine the source of sound type of pulse code modulation (PCM) data.
Wherein, multiple method is had to be capable of the determination of source of sound type of PCM data.The present invention is the most right
These methods limit, as long as being capable of the determination of the source of sound type of PCM data.Due to
Would generally comprise the various information about data in header information, the most such as, one of which determines method
It may be that the header information in Based PC M data determine the source of sound of PCM data be Dolby source of sound,
The source of sound that Dirac source of sound or high-pass platform system self provide.
Step S2, based on determined by source of sound type determine it is to select after Dolby post processing, Dirac
Process or Hi-Fi post processing carries out post processing.
Wherein, if it is Dolby sound that source of sound type determined by based on obtains the source of sound of described PCM data
Source, then select Dolby post processing that described PCM data is carried out post processing.Wherein, locate after Dolby
Reason can be completed by Dolby audio frequency general post processing (COPP) module.
If it is Dirac source of sound that source of sound type determined by based on obtains the source of sound of described PCM data, then
Select Dirac post processing that described PCM data is carried out post processing.Wherein, described Dirac post processing can
To be completed by Dirac COPP module.
If source of sound type determined by based on obtain the source of sound of described PCM data be high-pass platform system from
The Hi-Fi source of sound of body, then select Hi-Fi post processing that described PCM data is carried out post processing.
In a preferred implementation of the method according to the invention, can be after step S1, will
Determined by source of sound type add in described PCM data as parameter.
Below as a example by the high-pass platform system being integrated with Dolby and Dirac, to the sound according to the present invention
Frequency signal processing method carries out exemplary description.
The original source of sound of example one is Dolby source of sound.
Owing to Dolby sound source data is compression voice data, it is therefore desirable at the framework of high-pass platform system
In Ceng, first it is decoded obtaining decoded PCM data and determining this to this Dolby sound source data
Source of sound is Dolby source of sound；Then, in the ccf layer of high-pass platform system, source of sound class determined by general
Type adds in decoded PCM data；Then, PCM after the decoding of source of sound type parameter will be with the addition of
Data pass to the hardware abstraction layer (HAL) of high-pass platform system；Then, in high-pass platform system
In HAL layer, determine, based on the source of sound type parameter in the PCM data received, the PCM received
The source of sound of data is Dolby source of sound, and therefore selects the Dolby post processing PCM data to receiving
Carry out post processing.
The original source of sound of example two is Dirac source of sound.
Owing to Dirac sound source data is compression voice data, it is therefore desirable at the framework of high-pass platform system
In Ceng, first it is decoded obtaining decoded PCM data and determining this to this Dirac sound source data
Source of sound is Dirac source of sound；Then, in the ccf layer of high-pass platform system, source of sound class determined by general
Type adds in decoded PCM data；Then, PCM after the decoding of source of sound type parameter will be with the addition of
Data pass to the hardware abstraction layer (HAL) of high-pass platform system；Then, in high-pass platform system
In HAL layer, determine, based on the source of sound type parameter in the PCM data received, the PCM received
The source of sound of data is Dirac source of sound, and therefore selects Dirac post processing to enter the PCM data received
Row post processing.
The original source of sound of example three is the source of sound that high-pass platform system self provides.
The source of sound provided due to high-pass platform system self is exactly directly PCM data, therefore need not hold
Row decoding operation, it is possible in the ccf layer of high-pass platform system, directly determine this PCM data
Source of sound be high-pass platform system self provide source of sound and by determined by source of sound type add this PCM to
In data；Then, the PCM data that with the addition of source of sound type parameter is passed to high-pass platform system
HAL layer；Then, in the HAL layer of high-pass platform system, based in the PCM data received
Source of sound type parameter determine that the source of sound of the PCM data received is that high-pass platform system self provides
Source of sound, and the PCM number that the Hi-Fi post processing that therefore selection high-pass platform system self provides is to receiving
According to carrying out post processing.
So, Dolby post processing in same high-pass platform system, Dirac post processing are just solved
With the coexistence problems of Hi-Fi post processing, and it is capable of identify that and post processing Dolby sound source data, Dirac sound
The sound source data that source data, high-pass platform system self provides.
The present invention also provides for a kind of audio signal processor, as in figure 2 it is shown, this device can include sound
Source Type determines that module 21 and post processing select module 22.Wherein, source of sound determination type module 21, use
In the source of sound type determining pulse code modulation (PCM) data；And post processing selects module 22,
For based on determined by source of sound type determine selection Dolby post processing, Dirac post processing or
Hi-Fi post processing carries out post processing.
Wherein, source of sound determination type module 21 can use multiple method to determine the source of sound of PCM data
Type.The method that source of sound determination type module 21 is not used by the present invention limits, as long as can
Realize the determination of the source of sound type of PCM data.Such as, owing to header information would generally comprise
About the various information of data, therefore source of sound determination type module 21 can be with the report in Based PC M data
Header determines that the source of sound of PCM data is Dolby source of sound, Dirac source of sound or high-pass platform system
The source of sound that self provides.
If it addition, post processing select module 22 based on determined by source of sound type obtain described PCM data
Source of sound be Dolby source of sound, then select Dolby post processing described PCM data is carried out post processing.
Such as, post processing selects module 22 can promote according to the Dolby COPP included by assembly of the invention
Module 23 completes Dolby post processing, as shown in Figure 3.
If post processing select module 22 based on determined by source of sound type obtain the source of sound of described PCM data
It is Dirac source of sound, then selects Dirac post processing that described PCM data is carried out post processing.Such as, after
Process and select module 22 can promote according to the Dirac COPP module 24 included by assembly of the invention
Complete described Dirac post processing, as shown in Figure 3.
If post processing select module 22 based on determined by source of sound type obtain the source of sound of described PCM data
It is the Hi-Fi source of sound of high-pass platform system self, then selects Hi-Fi post processing that described PCM data is entered
Row post processing.Such as, post processing selects module 22 can promote the Audio Signal Processing according to the present invention
QTI COPP module 25 included by device completes described Hi-Fi post processing, as shown in Figure 3.Its
In, QTI is the acronym of high pass science and technology formula (Qualcomm Technologies, Inc), table
Bright QTI COPP module 25 is the Hi-Fi post-processing module that high-pass platform system carries.
In a preferred implementation according to assembly of the invention, described source of sound determination type module 21
Can be also used for using determined by source of sound type add in described PCM data as parameter.
Below as a example by the high-pass platform system being integrated with Dolby and Dirac, to the sound according to the present invention
Audio signalprocessing device carries out exemplary description.
The original source of sound of example one is Dolby source of sound.
Owing to Dolby sound source data is compression voice data, it is therefore desirable at the framework of high-pass platform system
In Ceng, first by the decoder module (not shown) of high-pass platform system, this Dolby sound source data is carried out
Decoding is to obtain decoded PCM data.Then, by according to assembly of the invention is positioned at high pass
Source of sound determination type module 21 in the ccf layer of plateform system determines that this source of sound is Dolby source of sound.So
After, this source of sound determination type module 21 by determined by source of sound type add decoded PCM data to
In.Then, the delivery module (not shown) in the ccf layer of high-pass platform system source of sound will be with the addition of
Post processing during PCM data passes to the HAL layer of high-pass platform system after the decoding of type parameter selects
Module 22.Then, post processing selects module 22 based on the source of sound type in the PCM data received
The source of sound of the PCM data that parameter determination receives is Dolby source of sound, and therefore promotes high-pass platform system
After the Dolby COPP module 23 in the HAL layer of the system PCM data to receiving carries out Dolby
Process.
The original source of sound of example two is Dirac source of sound.
Owing to Dirac sound source data is compression voice data, it is therefore desirable at the framework of high-pass platform system
In Ceng, first first this Dirac sound source data is entered by the decoder module (not shown) of high-pass platform system
Row decoding is to obtain decoded PCM data.Then, by according to assembly of the invention is positioned at height
Source of sound determination type module 21 in the ccf layer of logical plateform system determines that this source of sound is Dirac source of sound.So
After, this source of sound determination type module 21 by determined by source of sound type add decoded PCM data to
In.Then, the delivery module (not shown) in the ccf layer of high-pass platform system source of sound will be with the addition of
Post processing during PCM data passes to the HAL layer of high-pass platform system after the decoding of type parameter selects
Module 22.Then, post processing selects module 22 based on the source of sound type in the PCM data received
The source of sound of the PCM data that parameter determination receives is Dirac source of sound, and therefore promotes high-pass platform system
The Dirac COPP module 24 in the HAL layer of the system PCM data to receiving is located after carrying out Dirac
Reason.
The original source of sound of example three is the source of sound that high-pass platform system self provides.
The source of sound provided due to high-pass platform system self is exactly directly PCM data, therefore need not hold
Row decoding operation.First, straight by the source of sound determination type module 21 in the ccf layer of high-pass platform system
Connect and determine that the source of sound of this PCM data is sound determined by the source of sound that provides of high-pass platform system self general
Source Type adds in this PCM data.Then, by the transmission mould in the ccf layer of high-pass platform system
The PCM data that with the addition of source of sound type parameter is passed to the HAL of high-pass platform system by block (not shown)
Post processing in Ceng selects module 22.Then, post processing selects module 22 based on the PCM number received
Source of sound type parameter according to determines that the source of sound of the PCM data received is that high-pass platform system carries self
The source of sound of confession, and therefore promote QTI COPP module 25 that high-pass platform system self provides to reception
To PCM data carry out Hi-Fi post processing.
So, Dolby post processing in same high-pass platform system, Dirac post processing are just solved
With the coexistence problems of Hi-Fi post processing, and it is capable of identify that and post processing Dolby sound source data, Dirac sound
The sound source data that source data, high-pass platform system self provides.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention does not limit
Detail in above-mentioned embodiment, in the technology concept of the present invention, can be to the present invention
Technical scheme carry out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention,
In the case of reconcilable, can be combined by any suitable means.In order to avoid unnecessary
Repeating, various possible compound modes are illustrated by the present invention the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as its
Without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. an acoustic signal processing method, the method includes:
Step S1, determine the source of sound type of pulse code modulation PCM data；And
Step S2, based on determined by source of sound type determine it is to select after Dolby post processing, Dirac
Process or Hi-Fi post processing carries out post processing.
Method the most according to claim 1, wherein, in step sl, based on described PCM
Header information in data determine the source of sound of described PCM data be Dolby source of sound, Dirac source of sound also
It it is the source of sound of high-pass platform system self offer.
Method the most according to claim 1, the method also includes: after step S1, by institute
The source of sound type determined is added in described PCM data as parameter.
Method the most according to claim 1, wherein, described Dolby post processing is by Dolby sound
The most general post processing (COPP) module completes, and described Dirac post processing is by Dirac COPP module
Complete.
5. an audio signal processor, this device includes:
Source of sound determination type module, for determining the source of sound type of pulse code modulation PCM data；With
And
Post processing selects module, for based on determined by source of sound type determine it is to select to locate after Dolby
Reason, Dirac post processing or Hi-Fi post processing carries out post processing.
Device the most according to claim 5, wherein, described source of sound determination type module is based on institute
State the header information in PCM data to determine that the source of sound of described PCM data is Dolby source of sound, Dirac
The source of sound that source of sound or high-pass platform system self provide.
Device the most according to claim 5, wherein, described source of sound determination type module is additionally operable to
Determined by using, source of sound type is added in described PCM data as parameter.
Device the most according to claim 5, this device also includes:
Dolby audio frequency general post processing (COPP) module, has been used for described Dolby post processing；With
And
Dirac COPP module, has been used for described Dirac post processing.
Device the most according to claim 5, wherein, described source of sound determination type module is positioned at frame
Rack-layer.
Device the most according to claim 5, wherein, described post processing selects module to be positioned at hardware
Level of abstraction.
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Application publication date: 20160803 |