CN117061984A - Method and system for testing multi-channel audio content - Google Patents
Method and system for testing multi-channel audio content Download PDFInfo
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Abstract
The invention discloses a method and a system for testing multi-channel audio content, wherein the method comprises the following steps: selecting audio materials, and preparing a test material combination method and a strategy corresponding to a plurality of different contents according to different channel test requirements, wherein the audio materials comprise a plurality of single-track materials or a plurality of multi-track materials; transcoding the audio material into multi-channel audio; decoding the multi-channel audio into single-channel audio bare data; each audio material corresponds to a channel and keeps the content or information on the channel unchanged; monitoring whether the content of the output audio is normal or not, verifying the multi-channel audio effect which is not easy to distinguish by human ears, and judging that the multi-channel audio effect is normal if a listener can clearly hear the content or information of each channel and can feel spatial sense and direction sense; if the listener does not hear the content or information on each output channel or does not feel a sense of space and direction, it is determined that the multi-channel audio effect is abnormal.
Description
Technical Field
The invention belongs to the technical field of audio testing, and particularly relates to a method for testing multichannel audio content.
Background
With the development of the video entertainment industry, the multichannel audio technology has been widely applied to the fields of movies, television, broadcasting, games and the like, and the multichannel audio technology is increasingly attracting attention and application. The multi-channel audio technology is to play sounds in different directions or positions through a plurality of loudspeakers or headphones, so that a stereo, vivid and immersive hearing effect is created. A variety of multi-channel audio formats and standards have emerged, such as Dolby panoramic sound, audiovid three-dimensional sound, and the like.
However, multi-channel audio technology also presents some problems and challenges. One of these is how to verify the effect of multi-channel audio. At present, the existing testing method mainly has the following difficulties: (1) The cost of the test equipment is high, the operation is complex, the professional audio analyzer and a plurality of speakers are needed to be used for the multi-channel audio test at present, the equipment cost is high, the price of the audio analyzer is generally different from tens of thousands to hundreds of thousands, the operation is complex, different test methods and parameter settings are needed to be selected according to different test standards, and the multi-channel audio test is inconvenient for common users to use. (2) The test environment has high requirements, and proper environment needs to be selected to ensure no interference and no noise of the environment and the acoustic characteristics of the environment. (3) The requirement for setting up test equipment is high, and the positions and angles of placement of a plurality of speakers are required to follow certain specifications and requirements, otherwise, the accuracy and reliability of test results are affected. (4) The subjective difference of the test results is that the human ears have certain limitations on spatial positioning and direction perception, and some fine differences exist in stereo audio, such as sound field positioning, sound separation and the like, so that the human ears are difficult to accurately distinguish the fine differences, and different people can feel and evaluate the same multi-channel audio differently.
In summary, the verification of the multi-channel sound effect in the prior art is a complex, time-consuming and labor-consuming process, and requires a lot of manpower and financial resources, and specialized equipment and techniques. Therefore, a test method which is simpler and easier to implement, objective, effective and universal is needed.
Disclosure of Invention
In view of the above problems, the present invention provides a method and system for testing multi-channel audio content, which are used for simply and effectively verifying the effect of multi-channel audio, and timely finding and solving possible problems and defects in multi-channel audio signals.
In order to solve the technical problems, the invention adopts the following technical scheme:
in one aspect, the present invention provides a method for testing multi-channel audio content, comprising the steps of:
selecting audio materials, and preparing a test material combination method and a strategy corresponding to a plurality of different contents according to different channel test requirements, wherein the audio materials comprise a plurality of single-track materials or a plurality of multi-track materials;
transcoding the audio material into multi-channel audio;
decoding the multi-channel audio into single-channel audio bare data; each audio material corresponds to a channel and keeps the content or information on the channel unchanged;
monitoring whether the content of the output audio is normal or not, verifying the multi-channel audio effect which is not easy to distinguish by human ears, and judging that the multi-channel audio effect is normal if a listener can clearly hear the content or information of each channel and can feel spatial sense and direction sense; if the listener does not hear the content or information on each output channel or does not feel a sense of space and direction, it is determined that the multi-channel audio effect is abnormal.
In a possible implementation, the transcoding refers to assigning each individual track to a corresponding channel, and compressing and encapsulating according to coding format and parameters.
In a possible implementation, the decoding refers to restoring the compressed and encapsulated multi-channel audio file into original multiple individual channels, and outputting the channels to corresponding speakers or headphones according to corresponding positions and angles.
In a possible implementation, the means for transcoding comprises software, hardware or a combination of hardware and software devices.
In a possible implementation, the playing tool listening to the output audio comprises a device in software, hardware or a combination of software and hardware.
In another aspect, the present invention provides a system for testing multi-channel audio content, including a material selection module, a multi-channel transcoding module, a decoding module, and a playback monitoring module, where,
the system comprises a material selection module, a test material combination module and a test material selection module, wherein the material selection module is used for selecting audio materials, and preparing a test material combination method and a strategy corresponding to a plurality of different contents according to different channel test requirements, wherein the audio materials comprise a plurality of single-track materials or a plurality of multi-track materials;
the multi-channel transcoding module is used for transcoding the audio materials into multi-channel audio;
the decoding module is used for decoding the multi-channel audio into audio bare data of a single channel; each audio material corresponds to a channel and keeps the content or information on the channel unchanged;
the playing monitoring module is used for monitoring whether the content of the output audio is normal or not, verifying the multi-channel audio effect which is not easy to distinguish by human ears, and judging that the multi-channel audio effect is normal if a listener can clearly hear the content or information of each channel and can feel the sense of space and direction; if the listener does not hear the content or information on each output channel or does not feel a sense of space and direction, it is determined that the multi-channel audio effect is abnormal.
In a possible implementation, the transcoding refers to assigning each individual track to a corresponding channel, and compressing and encapsulating according to coding format and parameters.
In a possible implementation, the decoding refers to restoring the compressed and encapsulated multi-channel audio file into original multiple individual channels, and outputting the channels to corresponding speakers or headphones according to corresponding positions and angles.
In a possible implementation, the means for transcoding comprises software, hardware or a combination of hardware and software devices.
In a possible implementation, the playing tool listening to the output audio comprises a device in software, hardware or a combination of software and hardware.
The invention has the following beneficial effects:
(1) The effect of the multi-channel audio can be simply and effectively verified, and problems and defects possibly existing in the multi-channel audio signal, such as channel dislocation, distortion, noise and the like, can be timely found and solved. Compared with the traditional verification method, the method has the advantages that professional test equipment or software is not needed, complicated setting or operation is not needed, and performances in the aspects of channel distribution, sound quality, sound field positioning and the like of multi-channel audio can be rapidly and accurately detected by using a system supporting multi-channel transcoding, a system supporting multi-channel decoding and a loudspeaker or an earphone, so that the threshold for verifying the effect of verifying the multi-channel audio is reduced, and a common user or a small-scale producer can use the multi-channel audio.
(2) The multi-track material can be flexibly selected and switched according to the requirements and preferences of different users or scenes, so that the use flexibility and the individuation degree are improved; it can also be applied to multi-track materials and multi-channel encoders of different types and formats; the quality and performance of the multichannel audio signal are evaluated and improved by the user, and no special training or experience is needed for the listener, so that subjective judgment and error of the stereo audio by the human ear are avoided, and the reliability and objectivity are higher.
Drawings
FIG. 1 is a flow chart of steps of a method for multi-channel audio content testing according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a transcoding implementation in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating decoding and listening implementation in an embodiment of the present invention;
fig. 4 is a functional block diagram of a system for multi-channel audio content testing in accordance with an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a flowchart of steps of a method for testing multi-channel audio content according to an embodiment of the present invention is shown, including the steps of:
s10, selecting audio materials, and preparing a test material combination method and a strategy corresponding to a plurality of different contents according to different channel test requirements, wherein the audio materials comprise a plurality of single-track materials or a plurality of multi-track materials; different content or information (e.g., different languages or numbers) is recorded or stored on each track;
by selecting audio material, suitable multi-track material can be selected as the test source. Multitrack material refers to an audio file made up of a plurality of individual audio tracks, each of which contains different sound content, such as different languages, musical instruments, songs, etc. The multitrack material should satisfy the following conditions: the sound content of each track is not repeated and easily distinguishable from other tracks; the sound quality of each track is clear and noiseless; the sound length of each track is the same or close; the sound intensity of each track is comparable or adjustable. Through the arrangement, the diversity and the controllability of the test source can be ensured, so that the multichannel audio effect can be effectively verified.
S20, transcoding the audio materials (such as 10 audio materials) into multi-channel (such as 5.1.4 channels) audio; the means utilized for transcoding may be software, hardware, or a combination of hardware and software devices, such as an online transcoding system;
s30, decoding multi-channel audio (such as 5.1.4 channels) into single-channel audio bare data (such as 10-channel audio); each audio material corresponds to a channel (e.g., audio channel one corresponds to the audio content of audio material one and the audio effect of the left channel is played) and the content or information on the channel is kept unchanged; decoding refers to restoring the compressed and packaged multi-channel audio file into original multiple independent channels, and outputting to corresponding speakers or headphones according to corresponding positions and angles.
S40, monitoring whether the content of the output audio is normal or not, verifying the multi-channel audio effect which is not easy to distinguish by human ears, and judging that the multi-channel audio effect is normal if a listener can clearly hear the content or information of each channel and can feel the sense of space and direction; if the listener does not hear the content or information on each output channel or does not feel a sense of space and direction, it is determined that the multi-channel audio effect is abnormal. The playback tool/system listening to the output audio may be a device in software, hardware or a combination of software and hardware, such as an audio listening system.
In a specific application example of the present invention, in S10, the specific implementation manner may be:
when 5.1-channel audio is required to be tested, 6 audio materials with different contents can be selected, and the audio file or live stream with 5.1-channel can be obtained by transcoding the materials through a rear-end multi-channel transcoding module; when 5.1.4-channel audio needs to be tested, 10 audio materials with different contents can be selected, and the audio file or live stream with 5.1.4-channel can be obtained by transcoding the materials through a back-end multi-channel transcoding module.
When the actual multi-channel audio application scene is a music variety, male voices, female voices and various instrument voices can be selected as materials, so that the simulation test of the actual application scene can be fitted to a greater extent, and the rationality and reliability of the system test can be ensured.
When the multi-channel audio has no actual application scene, selecting the audio content with multiple types and spans, for example: multilingual, multi-scene, multi-biological audio ensures system testing representativeness.
The test material selection can prepare a test material combination method and strategy corresponding to a plurality of different contents according to different channel test requirements for selection during subsequent multi-channel transcoding input.
In a specific application example of the present invention, S20 is configured to transcode the selected multi-track material into a multi-channel audio file, and may transfer multi-channel audio with different formats and different effects according to the test requirements. Multi-channel refers to multi-channel audio consisting of two or more independent channels, such as 2.0, 5.1, 7.1, and 5.1.4, etc. Transcoding means that each individual track is assigned to a corresponding channel and compressed and packaged according to certain coding formats and parameters, which can be done using any suitable tool, such as FFmpeg or on-line transcoding systems, etc.
Referring to fig. 2, taking 5.1.4 audio as an example, 10 audio files with different contents are selected in front-end material selection, the audio files are respectively audio file one, audio file two to audio file ten, the above files are converted into audio of one 5.1.4 channel through a transcoding tool/system, at this time, the audio of the one 5.1.4 channel is rendered by 10 channels and the audio material content corresponding to each channel is unique, the audio content corresponding to the left channel (L) is the material content of audio file one, the audio content corresponding to the right channel (R) is the material content of audio file two, the audio content corresponding to the center channel (C) is the material content of audio file three, the audio content corresponding to the low-frequency effect channel (LFE) is the material content of audio file four, the audio content corresponding to the left surround channel (Ls) is the material content of audio file five, the audio content corresponding to the right surround channel (Rs) is the material content of audio file six, the audio content corresponding to the left front channel (Ltf) is the material content of audio file seven, the audio content corresponding to the audio file upper audio channel (Rtf) is the material content of audio file nine, and the audio file corresponding to the audio file nine is the audio file nine.
Referring to fig. 3, taking 5.1.4 audio as an example, the 5.1.4 audio transcoded from the front end is taken as input of a playing tool/system, the playing tool/system (such as an audio monitoring system) decodes the audio into 10 audio of a single channel, at this time, the audio one corresponds to the content of the audio one of the front end material selection module, the audio two corresponds to the content of the audio two of the front end material selection module, the audio three corresponds to the content of the audio three of the front end material selection module to the content of the audio ten of the front end material selection module, the output audio is monitored through an earphone or a sound box device, whether the multi-channel audio content is correct or not is rapidly verified according to whether the corresponding audio playing effect is in a clamping or noise state, whether the multi-channel audio effect is normal or not is rapidly verified according to whether the audio playing effect of the 10 different audio playing effects are abnormal, and therefore, possible abnormal multi-channel audio can be detected more conveniently.
Referring to fig. 4, a schematic block diagram of a system for testing multi-channel audio content according to an embodiment of the present invention is shown, where the system includes a material selection module, a multi-channel transcoding module, a decoding module, and a playback monitoring module, where the material selection module is configured to select audio materials, and prepare a combination method and a policy of test materials corresponding to a plurality of different contents according to different channel test requirements, where the audio materials include a plurality of single-track materials or a plurality of multi-track materials; the multi-channel transcoding module is used for transcoding audio materials (such as 10 audio materials) into multi-channel (such as 5.1.4 channels) audio; the means utilized for transcoding may be software, hardware, or a combination of hardware and software devices, such as an online transcoding system; the decoding module is used for decoding multi-channel audio (such as 5.1.4 channels) into single-channel audio bare data (such as 10-channel audio); each audio material corresponds to a channel (e.g., audio channel one corresponds to the audio content of audio material one and the audio effect of the left channel is played) and the content or information on the channel is kept unchanged; decoding refers to restoring the compressed and packaged multi-channel audio file into original multiple independent channels, and outputting to corresponding speakers or headphones according to corresponding positions and angles. The playing monitoring module is used for monitoring whether the content of the output audio is normal or not, verifying the multi-channel audio effect which is not easy to distinguish by human ears, and judging that the multi-channel audio effect is normal if a listener can clearly hear the content or information of each channel and can feel the sense of space and direction; if the listener does not hear the content or information on each output channel or does not feel a sense of space and direction, it is determined that the multi-channel audio effect is abnormal. The playback tool/system may be software, hardware or a combination of hardware and software devices, such as an audio listening system.
Wherein different content or information (e.g., different languages or numbers) is recorded or stored on each track in the material selection module; by selecting audio material, suitable multi-track material can be selected as the test source. Multitrack material refers to an audio file made up of a plurality of individual audio tracks, each of which contains different sound content, such as different languages, musical instruments, songs, etc. The multitrack material should satisfy the following conditions: the sound content of each track is not repeated and easily distinguishable from other tracks; the sound quality of each track is clear and noiseless; the sound length of each track is the same or close; the sound intensity of each track is comparable or adjustable. Through the arrangement, the diversity and the controllability of the test source can be ensured, so that the multichannel audio effect can be effectively verified.
In a specific application example of the present invention, the specific implementation manner in the material selection module may be:
when 5.1-channel audio is required to be tested, 6 audio materials with different contents can be selected, and the audio file or live stream with 5.1-channel can be obtained by transcoding the materials through a rear-end multi-channel transcoding module; when 5.1.4-channel audio needs to be tested, 10 audio materials with different contents can be selected, and the audio file or live stream with 5.1.4-channel can be obtained by transcoding the materials through a back-end multi-channel transcoding module.
When the actual multi-channel audio application scene is a music variety, male voices, female voices and various instrument voices can be selected as materials, so that the simulation test of the actual application scene can be fitted to a greater extent, and the rationality and reliability of the system test can be ensured.
When the multi-channel audio has no actual application scene, selecting the audio content with multiple types and spans, for example: multilingual, multi-scene, multi-biological audio ensures system testing representativeness.
The test material selection can prepare a test material combination method and strategy corresponding to a plurality of different contents according to different channel test requirements for selection during subsequent multi-channel transcoding input.
In a specific application example of the present invention, the multi-channel transcoding module is configured to transcode the selected multi-track material into a multi-channel audio file, and can transfer multi-channel audio with different formats and different effects according to the test requirements. Multi-channel refers to multi-channel audio consisting of two or more independent channels, such as 2.0, 5.1, 7.1, and 5.1.4, etc. Transcoding means that each individual track is assigned to a corresponding channel and compressed and packaged according to certain coding formats and parameters, which can be done using any suitable tool, such as FFmpeg or on-line transcoding systems, etc.
Referring to fig. 2, taking 5.1.4 audio as an example, the front-end material selection module selects 10 audio files with different contents, namely, audio file one, audio file two and audio file ten, the above files are converted into audio with 5.1.4 channels through a transcoding tool/system as input, at this time, the audio with 5.1.4 channels is rendered by 10 channels and the audio material content corresponding to each channel is unique, the audio content corresponding to a left channel (L) is the material content of audio file one, the audio content corresponding to a right channel (R) is the material content of audio file two, the audio content corresponding to a center channel (C) is the material content of audio file three, the audio content corresponding to a low-frequency effect channel (LFE) is the material content of audio file four, the audio content corresponding to a left surround channel (Ls) is the material content of audio file five, the audio content corresponding to a right surround channel (Rs) is the material content of audio file six, the audio content corresponding to a left front (Ltf) is the audio content of audio file seven, the audio content corresponding to a front audio channel (37r) is the material content of audio file nine, and the audio content corresponding to a left channel (R) is the audio file nine.
Referring to fig. 3, taking 5.1.4 audio as an example, the 5.1.4 audio forwarded by the front-end multichannel transcoding module is used as input of a playing tool/system, the playing tool/system (such as an audio monitoring system) decodes the audio into 10 audio of a single channel, at this time, the audio one corresponds to the content of the audio material one of the front-end material selecting module, the audio two corresponds to the content of the audio material two of the front-end material selecting module, the audio three corresponds to the content of the audio material three of the front-end material selecting module to the audio ten corresponds to the content of the audio material ten of the front-end material selecting module, the output audio is monitored through headphones or a sound box device, whether the multichannel audio content is correct or not is verified quickly, whether the multichannel audio effect is normal or not is verified quickly according to whether the corresponding audio playing effect has a clip or noise, and whether each channel effect of the multichannel audio has abnormality or not is verified according to the 10 different audio playing effects, so that the possible abnormality of the multichannel audio can be detected more conveniently.
It should be understood that the exemplary embodiments described herein are illustrative and not limiting. Although one or more embodiments of the present invention have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.
Claims (10)
1. A method of multi-channel audio content testing, comprising the steps of:
selecting audio materials, and preparing a test material combination method and a strategy corresponding to a plurality of different contents according to different channel test requirements, wherein the audio materials comprise a plurality of single-track materials or a plurality of multi-track materials;
transcoding the audio material into multi-channel audio;
decoding the multi-channel audio into single-channel audio bare data; each audio material corresponds to a channel and keeps the content or information on the channel unchanged;
monitoring whether the content of the output audio is normal or not, verifying the multi-channel audio effect which is not easy to distinguish by human ears, and judging that the multi-channel audio effect is normal if a listener can clearly hear the content or information of each channel and can feel spatial sense and direction sense; if the listener does not hear the content or information on each output channel or does not feel a sense of space and direction, it is determined that the multi-channel audio effect is abnormal.
2. The method of multi-channel audio content testing according to claim 1, wherein transcoding means that each individual audio track is assigned to a corresponding channel and compressed and packaged according to coding format and parameters.
3. The method of multi-channel audio content testing according to claim 1, wherein the decoding means that the compressed and packaged multi-channel audio file is restored to original multiple individual channels and output to the corresponding speakers or headphones according to the corresponding positions and angles.
4. The method of claim 1, wherein the means for transcoding comprises software, hardware, or a combination thereof.
5. The method of claim 1, wherein the playback tool listening to the output audio comprises a device that is software, hardware, or a combination of software and hardware.
6. A system for testing multichannel audio content is characterized by comprising a material selection module, a multichannel transcoding module, a decoding module and a playing monitoring module, wherein,
the system comprises a material selection module, a test material combination module and a test material selection module, wherein the material selection module is used for selecting audio materials, and preparing a test material combination method and a strategy corresponding to a plurality of different contents according to different channel test requirements, wherein the audio materials comprise a plurality of single-track materials or a plurality of multi-track materials;
the multi-channel transcoding module is used for transcoding the audio materials into multi-channel audio;
the decoding module is used for decoding the multi-channel audio into audio bare data of a single channel; each audio material corresponds to a channel and keeps the content or information on the channel unchanged;
the playing monitoring module is used for monitoring whether the content of the output audio is normal or not, verifying the multi-channel audio effect which is not easy to distinguish by human ears, and judging that the multi-channel audio effect is normal if a listener can clearly hear the content or information of each channel and can feel the sense of space and direction; if the listener does not hear the content or information on each output channel or does not feel a sense of space and direction, it is determined that the multi-channel audio effect is abnormal.
7. The system for multi-channel audio content testing according to claim 6, wherein said transcoding means that each individual audio track is assigned to a corresponding channel and compressed and packaged according to coding format and parameters.
8. The system for multi-channel audio content testing according to claim 6, wherein the decoding means that the compressed and packaged multi-channel audio file is restored to original multiple individual channels and output to the corresponding speakers or headphones according to the corresponding positions and angles.
9. The system for multi-channel audio content testing according to claim 6, wherein the means for transcoding utilization comprises a device in software, hardware, or a combination of software and hardware.
10. The system for multi-channel audio content testing according to claim 6, wherein the playback means for listening to the output audio comprises a device in software, hardware, or a combination of software and hardware.
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