CN105227998A - The method and apparatus of balance Multi-audio-frequency volume - Google Patents
The method and apparatus of balance Multi-audio-frequency volume Download PDFInfo
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- CN105227998A CN105227998A CN201410307182.7A CN201410307182A CN105227998A CN 105227998 A CN105227998 A CN 105227998A CN 201410307182 A CN201410307182 A CN 201410307182A CN 105227998 A CN105227998 A CN 105227998A
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Abstract
The invention discloses a kind of method balancing Multi-audio-frequency volume.Described method comprises: obtain multi-path audio-frequency data; Determine the volume average that described multi-path audio-frequency data is corresponding, and calculate the first zoom factor described multi-path audio-frequency data being zoomed to same volume benchmark; The audio coder corresponding according to described multi-path audio-frequency data, determines the second zoom factor that described multi-path audio-frequency data is corresponding, and described second zoom factor is the coefficient value that the audio volume of same input is zoomed to same volume benchmark by different audio coder; According to described first zoom factor and described second zoom factor, described multi-path audio-frequency data is encoded; Multi-path audio-frequency data after coding is synthesized Multi-audio-frequency program.Application technical solution of the present invention, can carry out suitable convergent-divergent process, reach the balance of volume to the different audio frequency in Multi-audio-frequency program, thus improves the quality of Multi-audio-frequency program.
Description
Technical field
The present invention relates to audio/video encoding/decoding processing technology field, particularly relate to a kind of method and apparatus balancing Multi-audio-frequency volume.
Background technology
At present, Multi-audio-frequency program demand is extensive, and such as in media industry, form of TV programmes gets more and more, and in keen competition, the production method of program there occurs great changes.Many rails audio frequency and video in early stage record that to add later stage compilation synthesis more and more common, and television-quality is had qualitative leap.
Multi-audio-frequency program contains different audio frequency, and these audio frequency itself can there are differences in volume.And for these audio frequency, need to add audio coder in synthesis Multi-audio-frequency program, if audio coder algorithmically there are differences, the different audio frequency that can shine into same program have larger difference in volume, and the quality of so many audio program is just poor.
Summary of the invention
Based on this, be necessary to provide a kind of method and apparatus balancing Multi-audio-frequency volume, suitable convergent-divergent process can be carried out to the different audio frequency in Multi-audio-frequency program, reach the balance of volume, thus improve the quality of Multi-audio-frequency program.
Balance a method for Multi-audio-frequency volume, comprising:
Obtain multi-path audio-frequency data;
Determine the volume average that described multi-path audio-frequency data is corresponding, and calculate the first zoom factor described multi-path audio-frequency data being zoomed to same volume benchmark;
The audio coder corresponding according to described multi-path audio-frequency data, determines the second zoom factor that described multi-path audio-frequency data is corresponding, and described second zoom factor is the coefficient value that the audio volume of same input is zoomed to same volume benchmark by different audio coder;
According to described first zoom factor and described second zoom factor, described multi-path audio-frequency data is encoded;
Multi-path audio-frequency data after coding is synthesized Multi-audio-frequency program.
In one embodiment, the step of described acquisition multi-path audio-frequency data comprises:
Receive CVBS analog audio-video signal, obtain I2S digital signal through digital-to-analogue conversion, and extract voice data wherein; And
Receive sdi signal, and extract voice data wherein.
In one embodiment, the described step determining the volume average that described multi-path audio-frequency data is corresponding, comprising:
Described voice data is weighted on average according to predefined high, medium and low sound, calculates the volume average that described voice data is corresponding.
In one embodiment, described multi-path audio-frequency data is zoomed to the step of the first zoom factor of same volume benchmark by described calculating, comprising:
The volume average choosing described CVBS analog audio-video signal corresponding is benchmark, calculates the first zoom factor of multi-path audio-frequency data.
In one embodiment, the described audio coder corresponding according to described multi-path audio-frequency data, determine the step of the second zoom factor that described multi-path audio-frequency data is corresponding, comprising:
The audio coder corresponding according to described multi-path audio-frequency data, inquires about the volume mapping table prestored, obtains the second zoom factor that described multi-path audio-frequency data is corresponding; In described volume mapping table, have recorded the algorithm based on a standard audio encoder, different audio coder is based on the second zoom factor audio volume of same input being zoomed to same volume benchmark.
Balance a device for Multi-audio-frequency volume, comprising:
Multi-audio-frequency input module, for obtaining multi-path audio-frequency data;
Volume mean value computation module, for determining the volume average that described multi-path audio-frequency data is corresponding;
First zoom factor determination module, for calculating the first zoom factor described multi-path audio-frequency data being zoomed to same volume benchmark;
Second zoom factor determination module, for the audio coder corresponding according to described multi-path audio-frequency data, determine the second zoom factor that described multi-path audio-frequency data is corresponding, described second zoom factor is the coefficient value that the audio volume of same input is zoomed to same volume benchmark by different audio coder;
Audio coding module, for according to described first zoom factor and described second zoom factor, encodes to described multi-path audio-frequency data;
Synthesis module, for synthesizing Multi-audio-frequency program by the multi-path audio-frequency data after coding.
In one embodiment, described Multi-audio-frequency input module is used for:
Receive CVBS analog audio-video signal, obtain I2S digital signal through digital-to-analogue conversion, and extract voice data wherein; And
Receive sdi signal, and extract voice data wherein.
In one embodiment, described volume mean value computation module, for being weighted on average according to predefined high, medium and low sound described voice data, calculates the volume average that described voice data is corresponding.
In one embodiment, described first zoom factor determination module is benchmark for the volume average choosing described CVBS analog audio-video signal corresponding, calculates the first zoom factor of multi-path audio-frequency data.
In one embodiment, described second zoom factor determination module, for the audio coder corresponding according to described multi-path audio-frequency data, inquires about the volume mapping table prestored, obtains the second zoom factor that described multi-path audio-frequency data is corresponding; In described volume mapping table, have recorded the algorithm based on a standard audio encoder, different audio coder is based on the second zoom factor audio volume of same input being zoomed to same volume benchmark.
The method and apparatus of above-mentioned balance Multi-audio-frequency volume, considers the sound volume difference of different audio-source, by the multi-path audio-frequency data obtained, determines corresponding volume average, is zoomed to the first zoom factor of same volume benchmark by volume mean value computation multi-path audio-frequency data.Have also contemplated that the difference of different audio coder algorithm, the audio coder corresponding by multi-path audio-frequency data simultaneously, determine the second zoom factor that multi-path audio-frequency data is corresponding.Follow-uply to encode according to the first zoom factor and the second zoom factor, then synthesize Multi-audio-frequency program, reach the balance of volume, improve the quality of Multi-audio-frequency program.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the method for balance Multi-audio-frequency volume in an embodiment;
Fig. 2 is the structural representation of the device of balance Multi-audio-frequency volume in an embodiment.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
See Fig. 1, provide a kind of method balancing Multi-audio-frequency volume in one embodiment.The method comprises:
Step 101, obtains multi-path audio-frequency data.
Concrete, synthesis Multi-audio-frequency program needs the multi-path audio-frequency data inputting Multi-audio-frequency source.Its form can be, but not limited to be a road audio, video data and multichannel pure audio data, and the Multi-audio-frequency program of final synthesis comprises road video data and a multi-path audio-frequency data.
In one embodiment, when receiving the CVBS analog audio-video signal of audio-video source, obtain I2S format digital signal through digital-to-analogue conversion, and extract voice data wherein, as a road voice data.And when the signal of the audio frequency and video received is SDI digital signal, the voice data of extracting directly I2S form wherein, as a road voice data.
Step 102, determines the volume average that multi-path audio-frequency data is corresponding, and calculates the first zoom factor multi-path audio-frequency data being zoomed to same volume benchmark.
Concrete, when getting multi-path audio-frequency data, process chip can be transferred to process, calculating corresponding volume average.Wherein, process chip can be FPGA, CPLD etc.The multi-path audio-frequency data of process chip process can be the I2S voice data of fixing 48KHz.After obtaining the volume average of multi-path audio-frequency data, according to the same volume benchmark chosen, calculate the first zoom factor multi-path audio-frequency data being zoomed to this volume benchmark.Wherein, the volume benchmark chosen can be the volume average of a certain road voice data, also can be the average of the volume average to all voice datas.
In one embodiment, when process chip calculates the volume average of voice data, the number range of high pitch, middle pitch and bass can be pre-defined, then to voice data to be dealt with, be weighted on average to high, medium and low sound wherein, wherein weight factor pre-defines, and the weight factor of middle pitch is higher than the weight factor of high pitch and bass.The volume benchmark chosen is the volume average that the road CVBS analog audio-video signal that receives is corresponding, then according to the first zoom factor of this benchmark multi-path audio-frequency data.
Step 103, the audio coder corresponding according to multi-path audio-frequency data, determines the second zoom factor that multi-path audio-frequency data is corresponding.
Concrete, the second zoom factor is the coefficient value that the audio volume of same input is zoomed to same volume benchmark by different audio coder.Different audio coders due to algorithm different, to the same audio frequency of input, the volume average of its final voice data of coding can difference to some extent.Can prestore the second zoom factor, after determining the first zoom factor, the audio coder corresponding according to each road voice data reads the second different zoom factors.
In one embodiment, a volume mapping table can be created, in this volume mapping table, have recorded the algorithm based on a standard audio encoder (such as can be, but not limited to is MB86391 chip), different audio coder is based on the second zoom factor audio volume of same input being zoomed to same volume benchmark (i.e. the volume average of standard audio encoder output).After determining the first zoom factor, the audio coder that process chip is corresponding according to multi-path audio-frequency data, inquires about the volume mapping table prestored, and obtains the second zoom factor that multi-path audio-frequency data is corresponding.
Step 104, according to the first zoom factor and the second zoom factor, encodes to multi-path audio-frequency data.
Concrete, the sound volume difference of the different audio-source of the first zoom factor reaction.Second zoom factor reaction be the algorithm difference of different audio coder.When encoding again, after the first zoom factor is multiplied with the second zoom factor, leaves process chip (being such as the specific IP kernel of FPGA) in, convergent-divergent is carried out to the volume average of multi-path audio-frequency data.
Step 105, synthesizes Multi-audio-frequency program by the multi-path audio-frequency data after coding.
The method of above-mentioned balance Multi-audio-frequency volume, considers the sound volume difference of different audio-source, by the multi-path audio-frequency data obtained, determines corresponding volume average, is zoomed to the first zoom factor of same volume benchmark by volume mean value computation multi-path audio-frequency data.Have also contemplated that the difference of different audio coder algorithm, the audio coder corresponding by multi-path audio-frequency data simultaneously, determine the second zoom factor that multi-path audio-frequency data is corresponding.Follow-uply to encode according to the first zoom factor and the second zoom factor, then synthesize Multi-audio-frequency program, reach the balance of volume, improve the quality of Multi-audio-frequency program.
See Fig. 2, in one embodiment, a kind of device balancing Multi-audio-frequency volume is provided.This device comprises:
Multi-audio-frequency input module 201, for obtaining multi-path audio-frequency data.
Volume mean value computation module 202, for determining the volume average that multi-path audio-frequency data is corresponding.
First zoom factor determination module 203, for calculating the first zoom factor multi-path audio-frequency data being zoomed to same volume benchmark.
Second zoom factor determination module 204, for the audio coder corresponding according to multi-path audio-frequency data, determine that the second zoom factor that multi-path audio-frequency data is corresponding, the second zoom factor are the coefficient value that the audio volume of same input is zoomed to same volume benchmark by different audio coder.
Audio coding module 205, for according to the first zoom factor and the second zoom factor, encodes to multi-path audio-frequency data.
Synthesis module 206, for synthesizing Multi-audio-frequency program by the multi-path audio-frequency data after coding.
In one embodiment, Multi-audio-frequency input module 201 receives CVBS analog audio-video signal, obtains I2S digital signal through digital-to-analogue conversion, and extracts voice data wherein, and receives sdi signal, and extracts voice data wherein.
In one embodiment, volume mean value computation module 202 pairs of voice datas are weighted on average according to predefined high, medium and low sound, calculate the volume average that voice data is corresponding.
In one embodiment, it is benchmark that the first zoom factor determination module 203 chooses volume average corresponding to CVBS analog audio-video signal, calculates the first zoom factor of multi-path audio-frequency data.
In one embodiment, the audio coder that the second zoom factor determination module 204 is corresponding according to multi-path audio-frequency data, inquires about the volume mapping table prestored, and obtains the second zoom factor that multi-path audio-frequency data is corresponding.The pre-recorded algorithm based on a standard audio encoder in this volume mapping table, different audio coder is based on the second zoom factor audio volume of same input being zoomed to same volume benchmark.
The device of above-mentioned balance Multi-audio-frequency volume, considers the sound volume difference of different audio-source, by the multi-path audio-frequency data obtained, determines corresponding volume average, is zoomed to the first zoom factor of same volume benchmark by volume mean value computation multi-path audio-frequency data.Have also contemplated that the difference of different audio coder algorithm, the audio coder corresponding by multi-path audio-frequency data simultaneously, determine the second zoom factor that multi-path audio-frequency data is corresponding.Follow-uply to encode according to the first zoom factor and the second zoom factor, then synthesize Multi-audio-frequency program, reach the balance of volume, improve the quality of Multi-audio-frequency program.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. balance a method for Multi-audio-frequency volume, it is characterized in that, described method comprises:
Obtain multi-path audio-frequency data;
Determine the volume average that described multi-path audio-frequency data is corresponding, and calculate the first zoom factor described multi-path audio-frequency data being zoomed to same volume benchmark;
The audio coder corresponding according to described multi-path audio-frequency data, determines the second zoom factor that described multi-path audio-frequency data is corresponding, and described second zoom factor is the coefficient value that the audio volume of same input is zoomed to same volume benchmark by different audio coder;
According to described first zoom factor and described second zoom factor, described multi-path audio-frequency data is encoded;
Multi-path audio-frequency data after coding is synthesized Multi-audio-frequency program.
2. method according to claim 1, is characterized in that, the step of described acquisition multi-path audio-frequency data comprises:
Receive CVBS analog audio-video signal, obtain I2S digital signal through digital-to-analogue conversion, and extract voice data wherein; And
Receive sdi signal, and extract voice data wherein.
3. method according to claim 1 and 2, is characterized in that, the described step determining the volume average that described multi-path audio-frequency data is corresponding, comprising:
Described voice data is weighted on average according to predefined high, medium and low sound, calculates the volume average that described voice data is corresponding.
4. method according to claim 3, is characterized in that, described multi-path audio-frequency data is zoomed to the step of the first zoom factor of same volume benchmark by described calculating, comprising:
The volume average choosing described CVBS analog audio-video signal corresponding is benchmark, calculates the first zoom factor of multi-path audio-frequency data.
5. method according to claim 1 and 2, is characterized in that, the described audio coder corresponding according to described multi-path audio-frequency data, determines the step of the second zoom factor that described multi-path audio-frequency data is corresponding, comprising:
The audio coder corresponding according to described multi-path audio-frequency data, inquires about the volume mapping table prestored, obtains the second zoom factor that described multi-path audio-frequency data is corresponding; In described volume mapping table, have recorded the algorithm based on a standard audio encoder, different audio coder is based on the second zoom factor audio volume of same input being zoomed to same volume benchmark.
6. balance a device for Multi-audio-frequency volume, it is characterized in that, described device comprises:
Multi-audio-frequency input module, for obtaining multi-path audio-frequency data;
Volume mean value computation module, for determining the volume average that described multi-path audio-frequency data is corresponding;
First zoom factor determination module, for calculating the first zoom factor described multi-path audio-frequency data being zoomed to same volume benchmark;
Second zoom factor determination module, for the audio coder corresponding according to described multi-path audio-frequency data, determine the second zoom factor that described multi-path audio-frequency data is corresponding, described second zoom factor is the coefficient value that the audio volume of same input is zoomed to same volume benchmark by different audio coder;
Audio coding module, for according to described first zoom factor and described second zoom factor, encodes to described multi-path audio-frequency data;
Synthesis module, for synthesizing Multi-audio-frequency program by the multi-path audio-frequency data after coding.
7. device according to claim 6, is characterized in that, described Multi-audio-frequency input module is used for:
Receive CVBS analog audio-video signal, obtain I2S digital signal through digital-to-analogue conversion, and extract voice data wherein; And
Receive sdi signal, and extract voice data wherein.
8. the device according to claim 6 or 7, is characterized in that, described volume mean value computation module, for being weighted on average according to predefined high, medium and low sound described voice data, calculates the volume average that described voice data is corresponding.
9. device according to claim 8, is characterized in that, described first zoom factor determination module, is benchmark for the volume average choosing described CVBS analog audio-video signal corresponding, calculates the first zoom factor of multi-path audio-frequency data.
10. the device according to claim 6 or 7, it is characterized in that, described second zoom factor determination module, for the audio coder corresponding according to described multi-path audio-frequency data, inquire about the volume mapping table prestored, obtain the second zoom factor that described multi-path audio-frequency data is corresponding; In described volume mapping table, have recorded the algorithm based on a standard audio encoder, different audio coder is based on the second zoom factor audio volume of same input being zoomed to same volume benchmark.
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