CN113347553A - Audio output method, audio output device and multimedia server - Google Patents
Audio output method, audio output device and multimedia server Download PDFInfo
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Abstract
The embodiment of the invention discloses an audio output method, an audio output device and a multimedia server. The audio output method includes: analyzing a plurality of audio sources to obtain a plurality of audio source parameter sets which are in one-to-one correspondence with the plurality of audio sources; acquiring an audio output configuration parameter set; decoding audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one; respectively processing the multi-frame audio data according to the audio source parameter groups and the audio output configuration parameter groups to obtain multi-frame processed audio data which are in one-to-one correspondence with the multiple audio sources; and outputting the multi-frame processed audio data. The invention can realize the simultaneous acoustic playing of a plurality of audio source parameter sets corresponding to the multi-channel audio sources, and ensure the playing tone quality of the multi-channel audio sources.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an audio output method, an audio output apparatus, and a multimedia server.
Background
In an entertainment scene, it often appears that a program contains multiple materials such as audio, video, etc., and multiple audio and video materials contained in the same program usually have audio data, and in the process of playing the program, it is necessary to ensure that each material (audio, video) can be played according to the sound effect when it is recorded and stored. However, in the case where the audio source parameters of each of the multiple audio sources are different, it is difficult for these multiple audio sources to ensure the timbre effect of the audio sources when they are played simultaneously.
Disclosure of Invention
The present invention is directed to provide an audio output method, an audio output apparatus and a multimedia server, which can achieve high-quality audio playback under the condition that audio source parameters of multiple audio sources are different.
In one aspect, an embodiment of the present invention discloses an audio output method, including: analyzing a plurality of audio sources to obtain a plurality of audio source parameter sets which are in one-to-one correspondence with the plurality of audio sources; acquiring an audio output configuration parameter set; decoding audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one; respectively processing the multi-frame audio data according to the audio source parameter groups and the audio output configuration parameter groups to obtain multi-frame processed audio data which are in one-to-one correspondence with the multiple audio sources; and outputting the multi-frame processed audio data.
In the embodiment, the audio source is analyzed to obtain the audio source parameter group, the audio output configuration parameter group is obtained, and the decoded audio frame data is output after being processed according to the audio source parameter group and the audio output configuration parameter group, so that the multiple audio source parameter groups corresponding to multiple audio sources can be simultaneously played by the original sound, and the playing tone quality of the multiple audio sources is ensured.
In one embodiment of the invention, each audio source parameter set and the audio output configuration parameter set respectively comprises: sampling frequency; the processing the multi-frame audio data respectively according to the multi-audio-source parameter group and the audio output configuration parameter group to obtain multi-frame processed audio data corresponding to the multi-channel audio sources one to one, includes: comparing a plurality of sampling frequencies in the plurality of audio source parameter sets with sampling frequencies in the audio output configuration parameter set respectively; when the sampling frequency of a target audio source parameter group in the audio source parameter groups is not consistent with the sampling frequency in the audio output configuration parameter group, determining the number of resampling points of a target audio frame according to the sampling frequency of the target audio source parameter group, the sampling frequency of the audio output configuration parameter group and the number of sampling points of the target audio frame of a target audio source corresponding to the target audio source parameter group, and resampling the target frame according to the number of resampling points to obtain target frame processed audio data corresponding to the target frame of the target audio source in the multi-frame processed audio data.
In one embodiment of the invention, each audio source parameter set and the audio output configuration parameter set respectively comprises: sampling precision; the processing the multi-frame audio data respectively according to the multi-audio-source parameter group and the audio output configuration parameter group to obtain multi-frame processed audio data corresponding to the multi-channel audio sources one to one, includes: comparing a plurality of sampling accuracies in the plurality of audio source parameter sets with the sampling accuracies in the audio output configuration parameter set respectively; and when the sampling precision of a target audio source parameter group in the audio source parameter groups is inconsistent with the sampling precision in the audio output configuration parameter group, converting the target frame audio data of a target audio frame of a target audio source corresponding to the target audio source parameter group according to the sampling precision of the target audio source parameter group and the sampling precision of the audio output configuration parameter group to obtain target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
In one embodiment of the invention, each audio source parameter set and the audio output configuration parameter set respectively comprises: the number of output channels; the processing the multi-frame audio data respectively according to the multi-audio-source parameter group and the audio output configuration parameter group to obtain multi-frame processed audio data corresponding to the multi-channel audio sources one to one, includes: comparing the number of a plurality of output channels in the audio source parameter groups with the number of output channels in the audio output configuration parameter group respectively; and when the number of output channels of a target audio source parameter group in the plurality of audio source parameter groups is greater than the number of output channels in the audio output configuration parameter group, acquiring audio data corresponding to the number of output channels in the target audio source parameter group according to the number of output channels in the audio output configuration parameter group, and obtaining target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
In one embodiment of the invention, each audio source parameter set and the audio output configuration parameter set respectively comprises: channel layout; the processing the multi-frame audio data respectively according to the multi-audio-source parameter group and the audio output configuration parameter group to obtain multi-frame processed audio data corresponding to the multi-channel audio sources one to one, includes: comparing the various channel layouts in the audio source parameter groups with the channel layouts in the audio output configuration parameter groups respectively; and when the channel layout of a target audio source parameter group in the audio source parameter groups is inconsistent with the channel layout in the audio output configuration parameter group, acquiring audio data corresponding to the channel layout in the target audio source parameter group according to the channel layout in the audio output configuration parameter group, and obtaining target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
In an embodiment of the present invention, before the obtaining the set of audio output configuration parameters, the method includes: acquiring an initial audio output parameter set; and starting the audio output equipment according to the initial audio output parameter group and determining the audio output configuration parameter group.
In one embodiment of the invention, each audio source parameter set and the initial audio output parameter set respectively comprises: the number of output channels, sampling frequency, sampling precision and channel layout; the obtaining of the initial audio output parameter set includes: comparing the number of a plurality of output channels, the sampling frequency and the sampling precision in the audio source parameter groups, and respectively selecting the maximum value of the number of the output channels, the maximum value of the sampling frequency and the maximum value of the sampling precision as the number of the output channels, the sampling frequency and the sampling precision of the initial audio source output parameter group; and comparing a plurality of channel layouts in the audio source parameter groups, and selecting the channel layout with the most layout orientation in the channel layouts as the channel layout of the initial audio output parameter group.
In one embodiment of the present invention, the turning on an audio output device and determining the set of audio output configuration parameters according to the initial set of audio output parameters comprises: when the audio output device supports the initial audio output parameter group, starting the audio output device and taking the initial audio output parameter group as the audio output configuration parameter group; when the audio output device does not support the initial audio output parameter set, adjusting the initial audio output parameter set to obtain an adjusted audio output parameter set, starting the audio output device according to the adjusted audio output parameter set, and taking the adjusted audio output parameter set as the audio output configuration parameter set.
On the other hand, the embodiment of the invention also discloses an audio output device, which comprises: the device comprises an analysis module, an acquisition module, a decoding module, a processing module and an output module. The analysis module is used for analyzing a plurality of audio sources to obtain a plurality of groups of audio source parameters which are in one-to-one correspondence with the plurality of audio sources, wherein the plurality of groups of audio source parameters are not identical; the acquisition module is used for acquiring audio output configuration parameters; the decoding module is used for decoding the audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one; the processing module is used for respectively processing the multi-frame audio data according to the multiple groups of audio source parameters and the audio output configuration parameters to obtain multi-frame processed audio data which correspond to the multiple audio sources one by one; and the output module is used for outputting the multi-frame processed audio data.
In another aspect, an embodiment of the present invention further discloses a multimedia server, including: the device comprises an input interface, a processor, a memory and a sound card, wherein the processor is connected with the input interface; the memory is connected with the processor; the sound card is connected with the memory; wherein the processor is configured to: receiving a plurality of audio source parameters through the input interface, analyzing the plurality of audio sources to obtain a plurality of audio source parameter sets which are in one-to-one correspondence with the plurality of audio sources; acquiring an audio output configuration parameter set; decoding audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one; respectively processing the multi-frame audio data according to the audio source parameter groups and the audio output configuration parameter groups to obtain multi-frame processed audio data which are in one-to-one correspondence with the multiple audio sources; and storing the multi-frame processed audio data to the memory so that the sound card can acquire and output the multi-frame processed audio data from the memory.
At least one technical scheme has the following advantages or beneficial effects:
the embodiment of the invention realizes the simultaneous acoustic playing of a plurality of audio source parameter groups corresponding to a plurality of audio sources by analyzing the audio sources to obtain the audio source parameter groups, obtaining the audio output configuration parameter groups and outputting the decoded audio frames after processing the audio frames through the audio source parameter groups and the audio output configuration parameter groups, thereby ensuring the playing tone quality of the plurality of audio sources.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating an audio output method according to a first embodiment of the present invention.
Fig. 2 is a detailed flowchart of the step S20 in fig. 1.
Fig. 3 is a detailed flowchart of step S18 in fig. 2.
Fig. 4 is a detailed flowchart of step S19 in fig. 2.
Fig. 5a is a detailed flowchart of step S40 in fig. 1.
Fig. 5b is another detailed flowchart of step S40 in fig. 1.
Fig. 5c is a schematic diagram illustrating a detailed flow of step S40 in fig. 1.
Fig. 5d is a schematic diagram illustrating a detailed flow of step S40 in fig. 1.
Fig. 6 is a schematic structural diagram of a multimedia server according to a first embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an audio output device according to a second embodiment of the disclosure.
Fig. 8 is a schematic structural diagram of an audio output system according to a third embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a computer-readable storage medium according to a fourth embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific implementation, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
[ first embodiment ] A method for manufacturing a semiconductor device
As shown in fig. 1, a first embodiment of the present invention provides an audio output method, for example, including the following steps:
s10: analyzing a plurality of audio sources to obtain a plurality of audio source parameter sets which are in one-to-one correspondence with the plurality of audio sources;
s20: acquiring an audio output configuration parameter set;
s30: decoding audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one;
s40: respectively processing the multi-frame audio data according to the audio source parameter groups and the audio output configuration parameter groups to obtain multi-frame processed audio data which are in one-to-one correspondence with the multiple audio sources; and
s50: and outputting the multi-frame processed audio data.
Specifically, each audio source parameter set of the plurality of audio source parameter sets mentioned in step S10 includes, for example: sampling frequency, sampling precision, output channel number and channel layout. Where reference is made to a sampling frequency, also referred to as sampling speed or sampling rate, for example, to the number of samples per second extracted from a continuous signal and forming a discrete signal, usually expressed in hertz (Hz), taking the example of a 48000Hz sampling frequency in audio source parameters, i.e. to the fact that a computer or multimedia device samples 48000 samples, i.e. sound samples, per second in audio data. The mentioned sampling precision, for example, also called Bit depth, means that the precision of measuring the amplitude of the sound waveform is reflected by the dynamic range of the collected sound, the larger the value is, the higher the resolution is, the sampling precision is in bits (Bit), the sampling precision in audio source parameters is 16Bit as an example, each sound sample collected by a computer or multimedia device is represented by 16Bit, the measured sound sample value is in the range of 0-65535, and its precision is 1/65536 of the input signal. The number of output channels mentioned is for example the number of channels of sound. The mentioned channel layout is for example an azimuth layout of audio output channels. It should be noted that, for example, the sampling frequency, the sampling precision, the number of output channels, and the channel layout in each two of the audio source parameter sets of the multiple audio sources are not completely the same or completely different.
Specifically, the audio output configuration parameter set mentioned in step S20 also includes, for example: sampling frequency, sampling precision, output channel number and channel layout.
As shown in fig. 2, step S20 is preceded by, for example:
s18, acquiring an initial audio output parameter group; and
and S19, starting the audio output device according to the initial audio output parameter group and determining the audio output configuration parameter group.
Specifically, the initial audio output parameter set mentioned in step S18 also includes, for example: sampling frequency, sampling precision, output channel number and channel layout.
As shown in fig. 3, step S18 specifically includes, for example:
s181, comparing the number of the output channels, the sampling frequency and the sampling precision in the audio source parameter groups, and respectively selecting the maximum value of the output channel number, the maximum value of the sampling frequency and the maximum value of the sampling precision as the output channel number, the sampling frequency and the sampling precision of the initial audio output parameter group; and
s182, comparing a plurality of channel layouts in the audio source parameter groups, and selecting the channel layout with the most layout orientation in the channel layouts as the channel layout of the initial audio output parameter group.
It should be noted that, in the embodiment of the present invention, the execution order of step S181 and step S182 is not limited, and step S181 may be executed first, or step S182 may be executed first.
The method comprises the following steps of taking a 5.1-channel audio source and a two-channel audio source as examples, wherein the channel layout of the 5.1-channel audio source comprises a front left channel, a front right channel, a rear left channel, a rear right channel, a middle channel and an optional bass channel, and the channel layout of the two-channel audio source comprises a left channel and a right channel. When the channel layouts of the plurality of audio source parameter sets include both the channel layout of the 5.1-channel audio source and the channel layout of the two-channel audio source, the channel layout with the most layout orientation in the plurality of channel layouts is selected to be the channel layout of the 5.1-channel audio source.
As shown in fig. 4, step S19 includes, for example:
s191, when the audio output device supports the initial audio output parameter set, starting the audio output device and using the initial audio output parameter set as the audio output configuration parameter set;
and S192, when the audio output device does not support the initial audio output parameter group, adjusting the initial audio output parameter group to obtain an adjusted audio output parameter group, starting the audio output device according to the adjusted audio output parameter group, and taking the adjusted audio output parameter group as the audio output configuration parameter group.
It should be noted that step S191 and step S192 are two specific execution cases of step S19, and thus step S191 and step S192 are not executed in a sequential order.
The mentioned adjustment is performed based on a human-computer interaction technology, for example, and the multimedia server responds to a user adjustment operation to obtain the adjusted audio output parameter set, or the multimedia server performs the adjustment operation based on a preset adjustment rule to obtain the adjusted audio output parameter set. The mentioned adjustment rule is, for example, based on that the sampling frequencies such as 48000Hz, 44100Hz, 220500Hz and the like in the configuration parameters of the existing audio output device are sequentially decreased, and after each adjustment, the multimedia server turns on the audio output device according to the adjusted audio output parameter group and takes the adjusted audio output parameter group as the audio output configuration parameter group.
Specifically, the multi-frame audio data mentioned in step S30 includes, for example: the number of sampling points and the time required to play the sampling points.
Each audio source parameter set and the audio output configuration parameter set respectively comprises: the sampling frequency. As shown in fig. 5a, step S40 includes, for example:
s41a, comparing the sampling frequencies in the audio source parameter groups with the sampling frequencies in the audio output configuration parameter groups respectively;
s42a, when the sampling frequency of the target audio source parameter group in the audio source parameter groups is not consistent with the sampling frequency in the audio output configuration parameter group, determining the number of resampling points of the target audio frame according to the sampling frequency of the target audio source parameter group, the sampling frequency of the audio output configuration parameter group and the number of sampling points of the target audio frame of the target audio source corresponding to the target audio source parameter group;
s43 a: and resampling the target frame according to the number of the resampling points to obtain target frame processed audio data corresponding to the target frame of the target audio source in the multi-frame processed audio data.
The obtained processed audio data is, for example, digitized sound data obtained by performing analog-to-digital conversion on a continuous analog audio signal at a certain frequency. It should be noted here that when the sampling frequencies of the two are consistent, the audio data of the target frame is directly output without resampling the target frame to obtain the processed audio data of the target frame corresponding to the target frame of the target audio source in the multi-frame processed audio data.
Wherein, the number of resampling points of the target audio frame is obtained by, for example, dividing the product of the sampling frequency in the mentioned audio output configuration parameter set and the number of sampling points of the target audio frame by the sampling frequency of the target audio source parameter (i.e. the number of resampling points is equal to the sampling frequency in the audio output configuration parameter set, the number of sampling points of the target audio frame/the sampling frequency of the target audio source parameter).
Wherein each audio source parameter set and the audio output configuration parameter set respectively comprises: and (4) sampling precision. As shown in fig. 5b, step S40 further includes, for example:
s41 b: comparing a plurality of sampling accuracies in the plurality of audio source parameter sets with the sampling accuracies in the audio output configuration parameter set respectively; and
s42 b: when the sampling precision of a target audio source parameter group in the audio source parameter groups is inconsistent with the sampling precision in the audio output configuration parameter group, converting the target frame audio data of a target audio frame of a target audio source corresponding to the target audio source parameter group according to the sampling precision of the target audio source parameter group and the sampling precision of the audio output configuration parameter group to obtain target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
It should be noted here that, when the sampling accuracies of the two are consistent, the audio data of the target frame is directly output without converting the target frame to obtain the target frame processed audio data corresponding to the target frame of the target audio source in the multi-frame processed audio data.
Wherein each audio source parameter set and the audio output configuration parameter set respectively comprises: and outputting the channel number. As shown in fig. 5c, step S40 further includes, for example:
s41 c: comparing the number of a plurality of output channels in the audio source parameter groups with the number of output channels in the audio output configuration parameter group respectively;
s42 c: and when the number of output channels of a target audio source parameter group in the audio source parameter groups is greater than that of the output channels in the audio output configuration parameter group, acquiring audio data corresponding to the number of output channels in the target audio source parameter group according to the number of output channels in the audio output parameter group to obtain target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
It should be noted here that, when the number of output channels of a target audio source parameter set in the plurality of audio source parameter sets is less than or equal to the number of output channels in the audio output configuration parameter set, corresponding output channels in the audio output configuration parameter set may be directly matched to obtain audio data corresponding to the number of output channels in the target audio source parameter set, so as to obtain target frame-processed audio data corresponding to the target audio frame in the multi-frame-processed audio data.
Wherein each audio source parameter set and the audio output configuration parameter set respectively comprises: and (4) channel layout. As shown in fig. 5d, step S40 further includes, for example:
s41 d: comparing the various channel layouts in the audio source parameter groups with the channel layouts in the audio output configuration parameter groups respectively;
s42 d: and when the channel layout of a target audio source parameter group in the audio source parameter groups is not consistent with the channel layout in the audio output configuration parameter group, acquiring audio data corresponding to the channel layout in the target audio source parameter group according to the channel layout in the audio output configuration parameter group to obtain target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
It should be noted here that when the channel layouts of the two are consistent, the audio data of the target frame is directly output without acquiring the audio data corresponding to the channel layout in the target audio source parameter group according to the channel layout in the audio output configuration parameter group to obtain the audio data after the target frame processing corresponding to the target audio frame in the multi-frame processed audio data.
Specifically, step S50 includes, for example: and outputting the multi-frame processed audio data to audio output equipment for playing. The audio output device is, for example, a sound card, but the embodiment of the present invention does not limit the specific type of the audio output device, and the audio output device may be specifically designed according to actual needs.
By the method, the original sound playing can be simultaneously carried out on a plurality of audio source parameter groups corresponding to the multi-channel audio sources under the condition of incomplete identity, and the playing tone quality of the multi-channel audio sources is ensured.
For ease of understanding, the audio output method disclosed in the embodiments of the present invention is exemplified below.
As shown in fig. 6, the audio output method disclosed in the embodiment of the present invention is applied to a multimedia server 200, for example, and the mentioned multimedia server 200 may include: input interface 210, processor 220, memory 230, and sound card 240. Wherein the mentioned processor 220 is connected to the input interface 210; the mentioned memory 230 is connected to the processor 220; the mentioned sound card 240 is connected to said memory 230. Of course, the multimedia server may also be an electronic device with a data processing function, such as a PC, an industrial personal computer, etc., and the present invention is not limited thereto.
Specifically, the input interface 210 may be, for example, an AES/EBU (Audio Engineering Society/European broadcasting Union) interface, although the embodiment of the present invention is not limited thereto, and may be specifically designed according to practical applications. The processor 220 is, for example, an ARM processor or a Central Processing Unit (CPU), though the embodiment of the present invention is not limited thereto, and may also be, for example, an MIPS processor. The memory 230 is, for example, a volatile memory or a nonvolatile memory. Specifically, the Memory 230, such as a RAM (Random Access Memory), a FLASH Memory (FLASH), etc., can be specifically designed according to practical applications. The sound card may be, for example, an integrated sound card, which has the advantages of low cost and good compatibility, and may also be, for example, a card sound card, which may be specifically designed according to practical applications.
For example, multiple audio sources are received through the input interface 210. The multiple audio sources include, for example, a 5.1-channel audio source and a two-channel audio source. The processor 220 analyzes the 5.1 channel audio source to obtain a plurality of 5.1 channel audio source parameter sets corresponding to the 5.1 channel audio source one by one; and analyzing the two-channel audio source to obtain a plurality of two-channel audio source parameter sets which are in one-to-one correspondence with the two-channel audio sources.
Specifically, the 5.1 channels refer to a front left channel, a front right channel, a rear left channel, a rear right channel, a center channel, and an optional bass channel, i.e., a 0.1 channel subwoofer channel. A total of 6 horns can be connected to a set of systems. Wherein, the '0.1' sound channel is a specially designed ultra-bass sound channel which can generate ultra-bass with the frequency response range of 20-120 Hz. The 5.1 channel audio source is referred to as a sound unit containing 5.1 channels. The principle of the binaural is that when people hear sound, the specific position of the sound source can be judged according to the relative sound phase difference between the left ear and the right ear. The mentioned binaural audio source is then a sound unit comprising two channels. Analyzing the 5.1 channel audio source to obtain the corresponding 5.1 channel audio source parameter set includes: the number of output channels is 6, the channel layout, the sampling frequency is 48000Hz, the sampling precision is 16bit, and the like. Parsing a binaural audio source to obtain a corresponding set of binaural audio source parameters includes, for example: the number of output channels is 2, the channel layout, the sampling frequency is 48000Hz, the sampling precision is 16bit, and the like. Of course, the present invention is not limited to this, and the parsing may be performed according to the actual audio source.
Further, the processor 220 obtains initial audio output parameters; and starting the audio output device according to the initial audio output parameters and determining the audio output configuration parameter set. The initial audio output parameter here may be, for example, a set of audio output parameters set by a user.
Of course, the initial audio output parameters may also be determined from a plurality of audio source parameter sets. Specifically, according to a 5.1 channel audio source parameter set obtained by parsing a 5.1 channel audio source: the number of output channels is 6, the channel layout, the sampling frequency is 48000Hz, the sampling precision is 16bit, and the like, and the parameter set of the dual-channel audio source obtained by analyzing the dual-channel audio source is as follows: the number of output channels is 2, the channel layout, the sampling frequency is 48000Hz, the sampling precision is 16bit, etc., the number of output channels, the sampling frequency and the sampling precision in the 5.1 sound channel audio source parameter group and the two-sound channel audio source parameter group are compared, and the maximum value of the number of output channels, the maximum value of the sampling frequency and the maximum value of the sampling precision are respectively selected as the number of output channels, the sampling frequency and the sampling precision of the initial audio output parameter, namely the number of output channels is 6, the sampling frequency is 48000Hz, and the sampling precision is 16 bit. Comparing the channel layout in the 5.1 channel audio source parameter group and the two-channel audio source parameter group, selecting the channel layout with the most layout orientation in the channel layout as the channel layout of the initial audio output parameters, namely the channel layout of the 5.1 channel audio source: a front left channel, a front right channel, a rear left channel, a rear right channel, a center channel, and an optional bass channel.
Specifically, when the audio output device supports the initial audio output parameter set, the audio output device is turned on, and the initial audio output parameter set is used as the audio output configuration parameter set. When the audio output device does not support the initial audio output parameter set, adjusting the initial audio output parameter set to obtain an adjusted audio output parameter set, starting the audio output device according to the adjusted audio output parameter set, and using the adjusted audio output parameter set as an audio output configuration parameter set. For example, if the sampling frequency in the obtained initial audio output parameter is 48000Hz, the plurality of audio output devices are traversed, and all the audio output devices do not support the sampling frequency in the initial audio output parameter set, the expected value may be reduced, the adjusted audio output parameter set is set, for example, the sampling frequency in the adjusted audio output parameter set is 44100Hz, the traversal of the plurality of audio output devices is repeated, and the audio output devices are turned on according to the reset audio output parameter set in sequence until the target audio output device is turned on and turned off successfully. And the adjusted audio output parameter set which is successfully opened the target audio output device is the audio output configuration parameter set.
Further, the processor 220 performs decoding processing on the 5.1 channel audio frame of the 5.1 channel audio source and the two channel audio frame of the two channel audio source respectively to obtain 5.1 channel audio frame data and two channel audio frame data. Specifically, the mentioned 5.1-channel audio frame data and the mentioned two-channel audio frame data include data such as the number of sampling points and the time required to play the sampling points, respectively, for example.
Further, the processor 220 respectively processes the 5.1-channel audio frame data and the two-channel audio frame data according to the 5.1-channel audio source parameter set, the two-channel audio source parameter set, and the audio output configuration parameter set to obtain processed 5.1-channel audio frame data and processed two-channel audio frame data corresponding to the 5.1-channel audio source and the two-channel audio source one to one.
Specifically, the sampling frequency in the 5.1-channel audio source parameter and the two-channel audio source parameter and the sampling frequency in the audio output configuration parameter group, the sampling precision in the 5.1-channel audio source parameter and the two-channel audio source parameter and the sampling precision in the audio output configuration parameter group, the number of output channels in the 5.1-channel audio source parameter and the two-channel audio source parameter and the number of output channels in the audio output configuration parameter group, and the channel layout in the 5.1-channel audio source parameter and the two-channel audio source parameter and the channel layout of the audio output configuration parameter group are compared, respectively. When the 5.1-channel audio source parameters and the two-channel audio source parameters are consistent with the audio output configuration parameter group, 5.1-channel audio frame data and two-channel audio frame data obtained by decoding the 5.1-channel audio source and the two-channel audio source can be directly output.
When the sampling frequency of a target audio source parameter group in the 5.1 channel audio source parameter group and the two-channel audio source parameter group is not consistent with the sampling frequency in the audio output configuration parameter group, determining the number of resampling points of a target audio frame according to the sampling frequency of the target audio source parameter, the sampling frequency of the audio output configuration parameter group and the number of sampling points of the target audio frame of the target audio source corresponding to the target audio source parameter group so as to resample the target frame to obtain target frame processed audio data of the target frame.
Specifically, assume that the number of resampling points for a target audio frame is denoted as out _ count, the sampling frequency in the audio output configuration parameter set is denoted as out _ frequency, the number of sampling points for a target audio frame is denoted as in _ count, and the sampling frequency for a target audio source parameter set is denoted as in _ frequency. The number of resample points for the target audio frame is obtained, for example, by dividing the product of the sampling frequency in the set of audio output configuration parameters and the number of sample points for the target audio frame by the sampling frequency for the set of target audio source parameters. (i.e., out _ count _ out _ frequency × in _ count/in _ frequency).
It should be noted that the time required for the playing samples of each frame of audio frame, i.e. the playing time duration, is kept consistent before and after the resampling, that is, assuming that the time required for the playing samples of each frame of audio frame, i.e. the playing time duration, is denoted as in _ duration, then in _ duration ═ in _ count ═ out _ frequency × out _ count.
When the sampling precision of a target audio source parameter group in the 5.1-channel audio source parameter group and the two-channel audio source parameter group is not consistent with the sampling precision in the audio output configuration parameter group, converting target frame audio data of a target audio frame of a target audio source corresponding to the target audio source parameter group in the 5.1-channel audio source parameter group and the two-channel audio source parameter group according to the sampling precision of the target audio source parameter group in the 5.1-channel audio source parameter group and the sampling precision in the audio output configuration parameter group to obtain target frame processed audio data corresponding to the target audio frame in multi-frame processed audio data.
When the number of output channels of the target audio source parameter group in the 5.1-channel audio source parameter group and the two-channel audio source parameter group is greater than the number of output channels in the audio output configuration parameter group, audio data corresponding to the number of output channels in the target audio source parameter group is obtained according to the number of output channels in the audio output configuration parameter group, and target frame processed audio data corresponding to a target audio frame in multi-frame processed audio data is obtained.
When the channel layout of the target audio source parameter group in the 5.1-channel audio source parameter group and the two-channel audio source parameter group is inconsistent with the channel layout in the audio output configuration parameter group, acquiring audio data corresponding to the number of output channels in the target audio source parameter group according to the channel layout in the audio output configuration parameter group to obtain target frame processed audio data corresponding to a target audio frame in multi-frame processed audio data.
It should be noted that the processor 220 stores the target frame processed audio data in the memory 230, so that the sound card 240 obtains and outputs the target frame processed audio data from the memory 230. The output audio data after the target frame processing is output through mixing, for example, the mentioned mixing output is a mixing output mode in the prior art, and is not described herein again.
In summary, in the embodiments of the present invention, by analyzing the audio source to obtain the audio source parameter group, obtaining the audio output configuration parameter group, and processing and outputting the decoded audio frame data according to the audio source parameter group and the audio output configuration parameter group, the multiple audio source parameter groups corresponding to multiple audio sources are simultaneously played in the original sound, so as to ensure the playing sound quality of the multiple audio sources. Especially, under the condition that the parameter sets of the audio sources are not completely the same or different, the normal playing of the audio sources can be ensured, and the playing sound quality is ensured.
[ second embodiment ]
As shown in fig. 7, the second embodiment of the present invention also provides an audio output apparatus 100, for example, including: parsing module 110, obtaining module 120, decoding module 130, processing module 140, and output module 150.
The parsing module 110 is configured to parse multiple audio sources to obtain multiple audio source parameter sets corresponding to the multiple audio sources one to one; the obtaining module 120 is, for example, configured to obtain a set of audio output configuration parameters; the decoding module 130 is configured to decode audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one; the processing module 140 is configured to, for example, respectively process the multiple frames of audio data according to the multiple audio source parameter sets and the audio output configuration parameter set to obtain multiple frames of processed audio data corresponding to the multiple audio sources one to one; and an output module 150, for example, for outputting the multi-frame processed audio data.
In particular, the mentioned audio source parameter set and the mentioned audio output configuration parameter set respectively comprise: sampling frequency, sampling precision, output channel number and channel layout. The mentioned processing module 140 is specifically configured to compare a plurality of sampling frequencies in the plurality of audio source parameter sets with sampling frequencies in the audio output configuration parameter set, compare a plurality of sampling accuracies in the plurality of audio source parameter sets with sampling accuracies in the audio output configuration parameter set, compare a plurality of output channel numbers in the plurality of audio source parameter sets with output channel numbers in the audio output configuration parameter set, and compare a plurality of channel layouts in the plurality of audio source parameter sets with channel layouts in the audio output configuration parameter set.
When the sampling frequency of a target audio source parameter group in the plurality of audio source parameter groups is not consistent with the sampling frequency in the audio output parameter group, the processing module 140 determines the number of resampling points of the target audio frame according to the sampling frequency of the target audio source parameter group, the sampling frequency of the audio output configuration parameter group, and the number of sampling points of a target audio frame of a target audio source corresponding to the target audio source parameter group, so as to resample the target frame according to the number of resampling points, and obtain target frame processed audio data corresponding to the target frame of the target audio source in the multi-frame processed audio data.
When the sampling precision of a target audio source parameter group in the multiple audio source parameter groups is not consistent with the sampling precision in the audio output configuration parameter group, the processing module 140 converts the target frame audio data of a target audio frame of a target audio source corresponding to the target audio source parameter group according to the sampling precision of the target audio source parameter group and the sampling precision of the audio output configuration parameter group, so as to obtain target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
When the number of output channels of a target audio source parameter set in the multiple audio source parameter sets is greater than the number of output channels in the audio output configuration parameter set, the processing module 140 obtains audio data corresponding to the number of output channels in the target audio source parameter set according to the number of output channels in the audio output configuration parameter set, and obtains target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
When the channel layout of a target audio source parameter group in the multiple audio source parameter groups is inconsistent with the channel layout in the audio output configuration parameter group, the processing module 140 obtains audio data corresponding to the channel layout in the target audio source parameter group according to the channel layout in the audio output configuration parameter group, and obtains target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
Specifically, the mentioned obtaining module 120 is for example further configured to obtain an initial set of audio output parameters before obtaining the set of audio output configuration parameters; and starting the audio output equipment according to the initial audio output parameter group and determining the audio output configuration parameter group. The obtaining module 120 compares a plurality of output channel numbers, a plurality of sampling frequencies, and a plurality of sampling accuracies in the plurality of audio source parameter groups, and respectively selects a maximum value of the plurality of output channel numbers, a maximum value of the plurality of sampling frequencies, and a maximum value of the plurality of sampling accuracies as the output channel number, the sampling frequency, and the sampling accuracy of the initial audio output parameter group; and comparing a plurality of channel layouts in the audio source parameter groups, and selecting the channel layout with the most layout orientation in the channel layouts as the channel layout of the initial audio output parameter group. In addition, when the audio output device supports the initial audio output parameter set, the obtaining module 120 turns on the audio output device and takes the initial audio output parameter set as the audio output configuration parameter set. When the audio output device does not support the initial audio output parameter set, the obtaining module 120 adjusts the initial audio output parameter set to obtain an adjusted audio output parameter set, starts the audio output device according to the adjusted audio output parameter set, and uses the adjusted audio output parameter set as the audio output configuration parameter set.
[ third embodiment ]
As shown in fig. 8, the third embodiment of the present invention further provides an audio output system 300. The audio output system 300 includes, for example, a processor 310 and a memory 320 coupled to the processor 310. The memory 320 is, for example, a nonvolatile memory, on which a computer program 321 is stored. The processor 310 is, for example, a central processing unit or the like. The processor 310, when running the computer program 321, performs the audio output method provided by the foregoing embodiments. For the specific working process and technical effects of the audio output system 300 in this embodiment, reference is made to the description of the audio output method in the foregoing embodiment, and details are not repeated here.
[ fourth example ] A
As shown in fig. 9, the fourth embodiment of the present invention further provides a computer-readable storage medium 400 storing computer-executable instructions 410. The computer-executable instructions 410 are for performing the audio output method as in the previous embodiments. The computer-readable storage medium 400 is, for example, a non-volatile memory, such as including: magnetic media (e.g., hard disks, floppy disks, and magnetic tape), optical media (e.g., CDROM disks and DVDs), magneto-optical media (e.g., optical disks), and hardware devices specially constructed for storing and executing computer-executable instructions 410 (e.g., Read Only Memories (ROMs), Random Access Memories (RAMs), flash memories, etc.). The computer-readable storage medium 400 may execute the computer-executable instructions 410 by one or more processors or processing devices to implement the audio output methods as provided by the foregoing embodiments.
In summary, the audio output method disclosed in the embodiments of the present invention obtains the audio source parameter group by parsing the audio source, obtains the audio output configuration parameter group, and outputs the decoded audio frame after processing the audio frame by the audio source parameter group and the audio output configuration parameter group, so as to implement simultaneous original sound playing of multiple audio source parameter groups corresponding to multiple audio sources, and ensure the playing sound quality of the multiple audio sources.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and the actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the present invention can also be implemented by one unit or means through software or hardware. "first," "second," etc. are used to denote names, and not to denote any particular order.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. An audio output method, comprising:
analyzing a plurality of audio sources to obtain a plurality of audio source parameter sets which are in one-to-one correspondence with the plurality of audio sources;
acquiring an audio output configuration parameter set;
decoding audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one;
respectively processing the multi-frame audio data according to the audio source parameter groups and the audio output configuration parameter groups to obtain multi-frame processed audio data which are in one-to-one correspondence with the multiple audio sources; and
and outputting the multi-frame processed audio data.
2. The audio output method of claim 1, wherein each audio source parameter set and the audio output configuration parameter set respectively comprises: sampling frequency; the processing the multi-frame audio data respectively according to the multi-audio-source parameter group and the audio output configuration parameter group to obtain multi-frame processed audio data corresponding to the multi-channel audio sources one to one, includes:
comparing a plurality of sampling frequencies in the plurality of audio source parameter sets with sampling frequencies in the audio output configuration parameter set respectively;
when the sampling frequency of a target audio source parameter group in the audio source parameter groups is not consistent with the sampling frequency in the audio output configuration parameter group, determining the number of resampling points of a target audio frame according to the sampling frequency of the target audio source parameter group, the sampling frequency of the audio output configuration parameter group and the number of sampling points of the target audio frame of a target audio source corresponding to the target audio source parameter group, and resampling the target frame according to the number of resampling points to obtain target frame processed audio data corresponding to the target frame of the target audio source in the multi-frame processed audio data.
3. The audio output method of claim 1, wherein each audio source parameter set and the audio output configuration parameter set respectively comprises: sampling precision; the processing the multi-frame audio data respectively according to the multi-audio-source parameter group and the audio output configuration parameter group to obtain multi-frame processed audio data corresponding to the multi-channel audio sources one to one, includes:
comparing a plurality of sampling accuracies in the plurality of audio source parameter sets with the sampling accuracies in the audio output configuration parameter set respectively; and
when the sampling precision of a target audio source parameter group in the audio source parameter groups is inconsistent with the sampling precision in the audio output configuration parameter group, converting target frame audio data of a target audio frame of a target audio source corresponding to the target audio source parameter group according to the sampling precision of the target audio source parameter group and the sampling precision of the audio output configuration parameter group, and obtaining target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
4. The audio output method of claim 1, wherein each audio source parameter set and the audio output configuration parameter set respectively comprises: the number of output channels; the processing the multi-frame audio data respectively according to the multi-audio-source parameter group and the audio output configuration parameter group to obtain multi-frame processed audio data corresponding to the multi-channel audio sources one to one, includes:
comparing the number of a plurality of output channels in the audio source parameter groups with the number of output channels in the audio output configuration parameter group respectively; and
and when the number of output channels of a target audio source parameter group in the audio source parameter groups is greater than that of the output channels in the audio output configuration parameter group, acquiring audio data corresponding to the number of output channels in the target audio source parameter group according to the number of output channels in the audio output configuration parameter group, and obtaining target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
5. The audio output method of claim 1, wherein each audio source parameter set and the audio output configuration parameter set respectively comprises: channel layout; the processing the multi-frame audio data respectively according to the multi-audio-source parameter group and the audio output configuration parameter group to obtain multi-frame processed audio data corresponding to the multi-channel audio sources one to one, includes:
comparing the various channel layouts in the audio source parameter groups with the channel layouts in the audio output configuration parameter groups respectively; and
and when the channel layout of a target audio source parameter group in the audio source parameter groups is inconsistent with the channel layout in the audio output configuration parameter group, acquiring audio data corresponding to the channel layout in the target audio source parameter group according to the channel layout in the audio output configuration parameter group, and obtaining target frame processed audio data corresponding to the target audio frame in the multi-frame processed audio data.
6. The audio output method of claim 1, wherein before obtaining the set of audio output configuration parameters, the method comprises:
acquiring an initial audio output parameter set; and
and starting the audio output equipment according to the initial audio output parameter group and determining the audio output configuration parameter group.
7. The audio output method according to claim 6, wherein each audio source parameter set and the initial audio output parameter set respectively comprises: the number of output channels, sampling frequency, sampling precision and channel layout; the obtaining of the initial audio output parameter set includes:
comparing the number of a plurality of output channels, the sampling frequency and the sampling precision in the audio source parameter groups, and respectively selecting the maximum value of the number of the output channels, the maximum value of the sampling frequency and the maximum value of the sampling precision as the number of the output channels, the sampling frequency and the sampling precision of the initial audio source output parameter group; and
and comparing a plurality of channel layouts in the audio source parameter groups, and selecting the channel layout with the most layout orientation in the channel layouts as the channel layout of the initial audio output parameter group.
8. The audio output method of claim 6, wherein the turning on an audio output device and determining the set of audio output configuration parameters according to the initial set of audio output parameters comprises:
when the audio output device supports the initial audio output parameter group, starting the audio output device and taking the initial audio output parameter group as the audio output configuration parameter group;
when the audio output device does not support the initial audio output parameter set, adjusting the initial audio output parameter set to obtain an adjusted audio output parameter set, starting the audio output device according to the adjusted audio output parameter set, and taking the adjusted audio output parameter set as the audio output configuration parameter set.
9. An audio output device, comprising:
the analysis module is used for analyzing a plurality of paths of audio sources to obtain a plurality of groups of audio source parameters which are in one-to-one correspondence with the plurality of paths of audio sources;
the acquisition module is used for acquiring audio output configuration parameters;
the decoding module is used for decoding the audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one;
the processing module is used for respectively processing the multi-frame audio data according to the multiple groups of audio source parameters and the audio output configuration parameters to obtain multi-frame processed audio data which correspond to the multiple audio sources one by one; and
and the output module is used for outputting the multi-frame processed audio data.
10. A multimedia server, comprising:
an input interface;
the processor is connected with the input interface;
a memory coupled to the processor;
the sound card is connected with the memory;
wherein the processor is configured to: receiving a plurality of audio source parameters through the input interface, analyzing the plurality of audio sources to obtain a plurality of audio source parameter sets which are in one-to-one correspondence with the plurality of audio sources; acquiring an audio output configuration parameter set; decoding audio frames of the multiple audio sources to obtain multiple frames of audio data corresponding to the multiple audio sources one to one; respectively processing the multi-frame audio data according to the audio source parameter groups and the audio output configuration parameter groups to obtain multi-frame processed audio data which are in one-to-one correspondence with the multiple audio sources; and storing the multi-frame processed audio data to the memory so that the sound card can acquire and output the multi-frame processed audio data from the memory.
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| CN101212830A (en) * | 2006-12-30 | 2008-07-02 | 上海乐金广电电子有限公司 | Audio extension device in audio system |
| JP2017192024A (en) * | 2016-04-13 | 2017-10-19 | 日本放送協会 | Channel number converter, broadcasting receiver and program |
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| CN101053152A (en) * | 2005-07-29 | 2007-10-10 | 哈曼国际工业有限公司 | Audio tuning system |
| CN101212830A (en) * | 2006-12-30 | 2008-07-02 | 上海乐金广电电子有限公司 | Audio extension device in audio system |
| JP2017192024A (en) * | 2016-04-13 | 2017-10-19 | 日本放送協会 | Channel number converter, broadcasting receiver and program |
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