WO2020182020A1 - 一种音频信号播放方法及显示设备 - Google Patents

一种音频信号播放方法及显示设备 Download PDF

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Publication number
WO2020182020A1
WO2020182020A1 PCT/CN2020/077599 CN2020077599W WO2020182020A1 WO 2020182020 A1 WO2020182020 A1 WO 2020182020A1 CN 2020077599 W CN2020077599 W CN 2020077599W WO 2020182020 A1 WO2020182020 A1 WO 2020182020A1
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Prior art keywords
audio signal
sub
display device
playback
speaker
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PCT/CN2020/077599
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English (en)
French (fr)
Inventor
孙小雷
文振兴
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青岛海信传媒网络技术有限公司
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Publication of WO2020182020A1 publication Critical patent/WO2020182020A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/439Processing of audio elementary streams
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00Stereophonic arrangements
    • H04R5/02Spatial or constructional arrangements of loudspeakers

Definitions

  • This application relates to multimedia processing technology, in particular to an audio signal playback method and display device.
  • Surround sound refers to the full-space three-dimensional perception of the location of the spatial sound source by human hearing.
  • stereo is to use modern electroacoustic technology to adjust the volume and phase of various frequency signals of each group of left and right channel speakers without changing the position of the left and right channel speakers, so that each group of speakers are in different positions on the front.
  • For surround sound two more speakers placed at the back are added, so that each group of speakers not only has a psychological "sound image” at different positions on the front, but also on the back, forming an all-round stereoscopic sound of the sound.
  • Solution 1 Use multiple speakers built in the display device to simulate surround sound.
  • Option two purchase panoramic surround speakers to achieve surround sound.
  • scheme two The current effect of scheme two is better than scheme one, but for general users, the price is expensive and the layout is more complicated.
  • the embodiments of the present application provide an audio signal playback method and device, which are used to realize stereo surround sound sound effects through a display device without increasing the implementation cost.
  • an audio signal playback method including:
  • the first part of the sub-audio signal is sent to the speaker in the display device for playback, and the second part of the sub-audio signal is sent to the Bluetooth speaker connected to the display device for playback.
  • a display device including a processor and a memory, wherein:
  • Memory used to save the acquired audio signal
  • the processor is configured to obtain an original audio signal, and determine whether the original audio signal supports surround sound effects, and obtain a judgment result; when it is determined that the judgment result indicates that surround sound effects are supported, read the information contained in the original audio signal Channel audio signal; and for each channel of sub audio signal, send the first part of the sub audio signal to the speaker in the display device for playback, and send the second part of the sub audio signal to the Bluetooth speaker connected to the display device for playback.
  • a storage medium stores a program for implementing audio signal playback, and when the program is run by a processor, the following steps are executed:
  • the first part of the sub-audio signal is sent to the speaker in the display device for playback, and the second part of the sub-audio signal is sent to the Bluetooth speaker connected to the display device for playback.
  • FIG. 1 is a schematic diagram of the placement positions of a display device and a Bluetooth speaker in an embodiment of the application
  • FIG. 2 is a schematic diagram of a flow of audio signal playback performed by a display device in an embodiment of the application
  • FIG. 3 is a schematic diagram of the structure of the working principle of the display device in an embodiment of the application.
  • FIG. 4 is a schematic diagram of a hardware implementation principle of a display device in an embodiment of the application.
  • FIG. 5 is a schematic diagram of the implementation principle of display device software in an embodiment of the application.
  • FIG. 6 is a schematic diagram of a signal format of a 5.1-channel audio signal in an embodiment of the application.
  • FIG. 7 is a schematic diagram of the architecture design of branching 5.1-channel audio signals by a display device in an embodiment of the application
  • FIG. 8 is a schematic diagram of a display device architecture in an embodiment of the application.
  • Fig. 9 is a schematic diagram of an audio processing path of a display device in an embodiment of the application.
  • a simpler method for realizing surround sound effects is designed by using display device speakers and Bluetooth speakers to solve the problem of unsatisfactory surround sound effects of the speakers built in the display device.
  • the use of display device speakers and independent Bluetooth speakers can also achieve surround sound effects.
  • the display device such as a smart TV
  • the display device divides the input original audio signal into multiple channels and outputs it to the display device speaker and the Bluetooth speaker respectively.
  • the two Bluetooth speakers are placed on the rear left and rear of the user.
  • the display device and the Bluetooth speaker are located on both sides of the user; in this way, combined with the speaker that comes with the display device (ie, the display device speaker), and in some embodiments, the output channel parameters of each audio signal are adjusted, thereby Can achieve better surround sound effects.
  • the display device when the display device processes the audio signal, it can be implemented in hardware or software, which will be described in detail in subsequent embodiments.
  • Step 200 The display device obtains the original audio signal.
  • the display device after the display device receives the original audio signal transmitted by the media center, it will be stored in the audio signal buffer (Audio Buffer).
  • Step 210 The display device decodes the obtained original audio signal.
  • Step 220 The display device determines whether the original audio signal supports surround sound effects? If yes, go to step 230; otherwise, go to step 260.
  • the display device when performing step 220, the display device needs to determine whether the number of sub audio signals contained in the original audio signal reaches a set threshold, if so, it is determined that the original audio signal supports surround sound effects, otherwise, it is determined The original audio signal does not support surround sound effects.
  • the original audio signal needs to include at least two sub-audio signals in order to achieve the minimum surround sound effect.
  • one sub-audio signal is sent to the speaker of the display device, and the same sub-audio signal can pass through two of the display device.
  • the speaker plays, and another sub-audio signal is sent to the Bluetooth speaker, or the same sub-audio signal can be played through two Bluetooth speakers.
  • the 5.1-channel original audio signal is taken as an example for description.
  • the 5.1-channel original audio signal includes six sub-audio signals, namely: left channel audio signal, right channel audio signal, and middle channel Audio signal, left surround channel audio signal, right surround channel audio signal and low frequency channel audio signal. Therefore, the 5.1-channel original audio signal can support digital surround sound (Digital Audio Effects, DTS) and Dolby surround sound (Dobly) )and many more.
  • DTS Digital Audio Effects
  • Dobly Dolby surround sound
  • Step 230 The display device determines whether a connection with the Bluetooth speaker has been established? If yes, go to step 240; otherwise, go to step 260.
  • the display device needs to make sure that the local connection has been established with the Bluetooth speaker, so as to ensure that each channel of audio signals is sent to the Bluetooth speaker.
  • Step 240 The display device reads the multiple sub-audio signals contained in the original audio signal.
  • each sub audio signal contains multiple sub audio signals, which can be read directly.
  • Each sub audio signal carries corresponding identification information. In the subsequent process, it will be based on the corresponding identification of each sub audio signal.
  • Information, each sub-audio signal is sent to the speaker in the corresponding position.
  • the display device can use a digital signal processor (Digital Signal Processing, DSP) to implement the above method, or a central processing unit (Central Processing Unit, CPU) to implement the above method.
  • DSP Digital Signal Processing
  • CPU Central Processing Unit
  • Step 250 Among the sub-audio signals of the display device, the first part of the sub-audio signal is sent to the speaker in the housing of the display device for playback, and the second part of the sub-audio signal is sent to the mobile Bluetooth speaker wirelessly connected to the display device for playback. Play according to play.
  • the display device may adopt the following methods:
  • the left channel audio signal is sent to the left speaker (also called the first speaker) of the display device for playback, and the right channel audio signal is sent to the right speaker of the display device (also called the first speaker).
  • the second speaker to play;
  • the left surround channel audio signal is sent to the left Bluetooth speaker for playback
  • the right surround channel audio signal is sent to the right Bluetooth speaker for playback.
  • the method further includes: if the original audio signal further includes a middle channel audio signal, when the display device determines that a third speaker is present in the display device housing, sending the middle channel audio signal to the The third speaker plays;
  • the display device sends the low-frequency audio signal to the fourth sound box for playback when it is determined that there is a fourth sound box in the display device housing.
  • Step 260 The display device sends each channel of sub audio signals to the speakers in the display device for playback.
  • the display device sends the left channel audio signal to the left speaker in the display device housing for playback, and sends the right channel audio signal to the right speaker in the display device housing for playback.
  • the original audio signal input to the display device is a 5.1-channel original audio signal, also known as 5.1Chs Pulse Code Modulation (PCM), and the display device is 5.1
  • the channel original audio signal is stored in the audio signal buffer (Audio Buffer), and then through signal decomposition, the 5.1 channel original audio signal is divided into two channels of 2-channel audio signals, also called 2Chs PCM data, where the first channel
  • the 2-channel audio signal includes a left-channel audio signal and a right-channel audio signal
  • the second 2-channel audio signal includes a left-surround-channel audio signal and a right-surround-channel audio signal.
  • the first 2-channel audio signal is transmitted to the left speaker and right speaker of the display device through the digital-analog converter (DAC) and power amplifier (AMP) transmission
  • the second 2-channel audio signal is transmitted to the left Bluetooth speaker by the Bluetooth module And the right Bluetooth speaker; among them, before outputting to the left Bluetooth speaker and the right Bluetooth speaker, the display device needs to establish a connection between the display device and the Bluetooth speaker.
  • the second 2-channel audio signal is transmitted through Bluetooth audio Model protocol (Advanced Audio Distribution Profile, A2DP) transmission.
  • Bluetooth audio Model protocol Advanced Audio Distribution Profile, A2DP
  • the shunting process from step 200 to step 260 can be implemented by a hardware solution or a software solution, which will be introduced separately below.
  • a digital processor Digital Signal Processing, DSP
  • DSP Digital Signal Processing
  • the DSP After the DSP separates the input 5.1-channel audio signal, it will set the audio and picture synchronization channel parameters of each sub-audio signal, and then the first sub-audio signal, including the left channel audio signal (denoted as Left), and the right Channel audio signal (denoted as Right), mid-channel audio signal (denoted as Center), low-frequency audio signal (denoted as LFE), output to the speaker in the display device housing through a digital-to-analog converter and power amplifier for playback, and
  • the second sub-audio signal including the left surround channel audio signal and the right surround channel audio signal, is output to the Bluetooth module through a digital power amplifier, and then output to a mobile Bluetooth speaker wirelessly connected to the display device.
  • the powerful signal processing capability of DSP is mainly used to output the decoded audio data stream (Audio Stream) containing multiple sub-audio signals to the speakers in the housing of the display device and the wireless connection of the display device.
  • Mobile Bluetooth speakers at the same time, you can also use DSP to set the audio and picture synchronization channel parameters of each sub-audio signal to make the surround sound better.
  • the audio processing thread in the CPU may be adopted. Specifically, the CPU saves the input 5.1 channel audio signal in the audio buffer (Audio Buffer), and then the CPU creates an audio processing thread (Audio Thread), through the Audio Thread, reads 5.1 channels from the Audio Buffer Audio signal, then, for the decoded 5.1 channel audio signal, the audio and picture synchronization channel parameters of each sub audio signal will be set, and then the first sub audio signal, including the left channel audio signal (denoted as Left), Right channel audio signal (denoted as Right), middle channel audio signal (denoted as Center), low-frequency audio signal (denoted as LFE), output to the speaker in the display device housing through a digital-to-analog converter and power amplifier for playback, and
  • the second sub-audio signal, including the left surround channel audio signal and the right surround channel audio signal is output to the Bluetooth module through the digital power amplifier, and then output to the movable Bluetooth speaker wirelessly connected to the display device
  • a 5.1-channel audio signal when a 5.1-channel audio signal is input, it will be managed by the Audio Buffer Manager (Manager), that is, the audio signals of each channel are stored in 5 buffers, and then the Audio Thread is notified, and the Audio Thread will be transferred from the Audio Buffer Manager.
  • the Audio Buffer Manager (Manager)
  • the Audio Thread is notified, and the Audio Thread will be transferred from the Audio Buffer Manager.
  • the audio signal of 5.1 channel (ie, Chs) has the following format: the audio signal of each channel occupies 1 byte.
  • Step a The display device stores the 5.1-channel audio signal (ie, the original audio signal) in the first-in first-out buffer [(First Input First Output, FIFO) BUFFER] according to the byte format.
  • Step b The display device transmits the 5.1-channel audio signal in the FIFO BUFFER to the frame buffer (FRAME BUFFER) in byte format through the input processing module (INPUT PROCESSOR).
  • Step c The display device obtains the 5.1-channel audio signal from FRAME BUFFER through the 5.1-channel pulse code modulation separation module (5.1CHS PCM SEPARATION MODULE).
  • 5.1CHS PCM SEPARATION MODULE the 5.1-channel pulse code modulation separation module
  • Step d The display device uses 5.1CHS PCM SEPARATION MODULE to store each channel of sub audio signals in the 5.1 channel audio data obtained from FRAME BUFFER into the corresponding 5 data buffers (DATA BUFFER) according to the byte format. So as to realize the separation of 5.1 channel audio signal, that is, the separation of 5.1Chs PCM audio data.
  • Step e The display device obtains the separated audio signals of each channel from the 5 DATA BUFFER through the software multiple distribution module (SOFTWARE DEMUX MODULE).
  • SOFTWARE DEMUX MODULE software multiple distribution module
  • Step f The display device transmits the separated sub-audio signals to the audio delay module (AUDIO DELAY MODULE) through the SOFTWARE DEMUX MODULE, and performs audio and video synchronization processing respectively, that is, setting audio and video synchronization channel parameters.
  • the audio delay module AUDIO DELAY MODULE
  • SOFTWARE DEMUX MODULE the SOFTWARE DEMUX MODULE
  • Step g The display device sends back the sub-audio signals after audio-visual synchronization processing to the SOFTWARE DEMUX MODULE through the AUDIO DELAY MODULE.
  • Step h The display device divides the separated sub-audio signals into two sub-audio signals through the SOFTWARE DEMUX MODULE, transmits the first sub-audio signals to the speakers in the display device housing, and transmits the second sub-audio signals Respectively transmitted to each mobile Bluetooth speaker wirelessly connected to the display device.
  • the display device includes at least a processor 80 and a memory 81, where:
  • the memory 81 is used to store the acquired audio signal
  • the processor 80 is configured to obtain an original audio signal, determine whether the original audio signal supports surround sound effects, and obtain a judgment result; when it is determined that the judgment result indicates that surround sound effects are supported, read multiple channels contained in the original audio signal Audio signal; and for each sub-audio signal, the first part of the sub-audio signal is sent to the speaker in the display device for playback, and the second part of the sub-audio signal is sent to the Bluetooth speaker connected to the display device for playback.
  • the original audio signal processing path (Audio Path) is shown by the dotted line in Figure 9.
  • the audio separation module in the display device It can also be called Audio Separation Module, which separates the 5.1-channel audio signal into two sub-audio signals, which are respectively transmitted to each speaker in the display device housing and each movable Bluetooth speaker wirelessly connected to the display device.
  • the processor 80 is configured to:
  • the processor 80 is further configured to:
  • the processor is a digital signal processor (DSP), or the processor is a central processing unit (CPU).
  • DSP digital signal processor
  • CPU central processing unit
  • the first part of the sub-audio signal is sent to each speaker in the housing of the display device for playback, and the second part of the sub-audio signal is sent to each movable speaker wirelessly connected to the display device.
  • the processor 80 is used to:
  • the original audio signal in FIFO BUFFER is transmitted to the architecture buffer FRAME BUFFER in byte format;
  • each sub-audio signal from each DATA BUFFER through the software multiplexing module SOFTWARE DEMUX MODULE, and transmit the sub-audio signals of each sub-audio signal to the audio delay module AUDIO DELAY MODULE for audio and picture synchronization processing;
  • each sub-audio signal after the audio-visual synchronization processing is transmitted back to the SOFTWARE DEMUX MODULE;
  • each sub-audio signal is divided into two sub-audio signals, the first sub-audio signal is transmitted to each speaker in the display device housing for playback, and the second sub-audio signal is transmitted to Each portable bluetooth speaker wirelessly connected with the display device plays.
  • the processor 80 is used to:
  • the left channel audio signal is sent to the left speaker in the display device housing for playback, and the right channel audio signal is sent to the right speaker in the display device housing for playback;
  • the left surround channel audio signal is sent to the left Bluetooth speaker wirelessly connected to the display device for playback
  • the right surround channel audio signal is sent to the right Bluetooth speaker wirelessly connected to the display device for playback.
  • the processor 80 is further configured to:
  • the display device sends the mid-channel audio signal to the third speaker when it is determined that there is a third speaker in the display device housing Play
  • the display device sends the low-frequency audio signal to the fourth sound box for playback when it is determined that a fourth sound box is present in the display device housing.
  • an embodiment of the present application provides a storage medium that stores a program for realizing audio signal playback, and when the program is run by a processor, the following steps are performed:
  • For each sub-audio signal send the first part of the sub-audio signal to the speaker in the display device for playback, and send the second part of the sub-audio signal to the Bluetooth speaker connected to the display device for playback;
  • the display device and the Bluetooth speaker are respectively located on both sides of the user.
  • the display device obtains the original audio signal
  • the sub-audio signal contained in the original audio signal is separated into two parts, and the first part of the sub-audio signal
  • the signal is sent to the speaker fixed inside the display device for playback, and the second part of the sub-audio signal is sent to the Bluetooth speaker connected to the display device for playback.
  • the Bluetooth speaker is convenient Mobile, simple layout, therefore, suitable for wide promotion, thus effectively improving product competitiveness and user experience.

Abstract

本申请提供一种音频信号播放方法,包括:显示设备获得原始音频信号后,若确定原始音频信号支持环绕声音效,则将原始音频信号中包含的子音频信号分离为两部分,将第一部分子音频信号发往固定在显示设备内部的音箱进行播放,而将第二部分子音频信号发往与显示设备无线连接的的蓝牙音箱进行播放。

Description

一种音频信号播放方法及显示设备
本申请要求在2019年3月11日提交中国专利局、申请号为201910181601.X、发明名称为“一种音频信号播放方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及多媒体处理技术,特别涉及一种音频信号播放方法及显示设备。
背景技术
环绕声是指人类听觉对空间声源位置的全空间立体感知。一般所谓立体声是利用现代电声技术在不改变左右声道扬声器位置的情况下,对左右声道各组音响的各种频率信号的音量与相位分别进行调节,使各组音响在正面不同的位置上出现心理上的“声像”。而环绕声,则再增加两个置于背后的音箱,使各组音响不仅在正面、也还在背后不同的位置上出现心理上的“声像”,形成音响的全方位的空间立体感。
目前,由于显示设备本身带有的音箱无法分离,很难实现真正的环绕声,无法实现全方位的空间立体感。
已知的方案中,有两种实现环绕声的方式。
方案一,利用显示设备内置的多个音箱模拟实现环绕声。
但是,由于多个音箱的位置在显示设备内部相距较近,因此,实现效果不好。
方案二,购买全景环绕音箱,实现环绕声。
方案二的现效果相较方案一较好,但是对于一般用户来说,价格昂贵,布置较复杂。
因此,需要设计一种新的方案,用以克服上述缺陷。
发明内容
本申请实施例提供一种音频信号播放方法及装置,用以在不增加实现成本的前提下,通过显示设备实现立体环绕声的音效。
本申请实施例提供的具体技术方案如下:
第一方面,提供一种音频信号播放方法,包括:
获取原始音频信号,并判断所述原始音频信号是否支持环绕音效,获得判断结果;
确定所述判断结果表征支持环绕音效时,读取所述原始音频信号中包含的多路子音频信号;
针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放。
第二方面,提供一种显示设备,包括处理器和存储器,其中,
存储器,用于保存获取的音频信号;
所述处理器,用于获取原始音频信号,并判断所述原始音频信号是否支持环绕音效,获得判断结果;确定所述判断结果表征支持环绕音效时,读取所述原始音频信号中包含的多路子音频信号;以及针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发 往与显示设备连接的蓝牙音箱进行播放。
第三方面,提供一种存储介质,保存有用于实现音频信号播放的程序,所述程序被处理器运行时,执行以下步骤:
获取原始音频信号,并判断所述原始音频信号是否支持环绕音效,获得判断结果;
确定所述判断结果表征支持环绕音效时,读取所述原始音频信号中包含的多路子音频信号;
针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放。
附图说明
图1为本申请实施例中显示设备和蓝牙音箱的放置位置示意图;
图2为本申请实施例中显示设备进行音频信号播放流程示意图;
图3为本申请实施例中显示设备工作原理架构示意图;
图4为本申请实施例中显示设备硬件实现原理示意图;
图5为本申请实施例中显示设备软件实现原理示意图;
图6为本申请实施例中5.1声道音频信号的信号格式示意图;
图7为本申请实施例中显示设备对5.1声道音频信号进行分路的架构设计示意图;
图8为本申请实施例中显示设备架构示意图;
图9为本申请实施例中显示设备的音频处理路径示意图。
具体实施方式
为了在不增加实现成本的前提下,通过显示设备实现立体环绕声的音效。
本申请实施例中,利用显示设备音箱和蓝牙音箱,设计了一种更简单的实现环绕声音效的方法在解决显示设备本身自带的音箱环绕声音效不理想的问题。
下面结合附图对本申请在一些实施例中实施方式作出进一步详细说明。
本申请实施中,利用显示设备音箱和独立的蓝牙音箱,同样可以实现环绕声音效。具体的,参阅图1所示,显示设备(如,智能电视)将输入的原始音频信号分为多路分别输出至显示设备音箱和蓝牙音箱,同时,将两个蓝牙音箱放置在用户左后方和右后方,即显示设备与蓝牙音箱分别位于用户两侧;这样,结合显示设备自带的音箱(即显示设备音箱),以及在一些实施例中,调节各路音频信号的输出声道参数,从而能实现更好的环绕声音效。
本申请实施例中,显示设备对音频信号进行处理时,可以采用硬件方式实现,也可以采用软件方式实现,后续实施例中将会进行详细介绍。
参阅图2所示,本申请实施例中,显示设备对音频信号进行播放的详细流程如下:
步骤200:显示设备获取原始音频信号。
参阅图3所示,本申请实施例中,显示设备接收到媒体中心传输的原始音频信号后,会将保存在音频信号缓存(Audio Buffer)中。
步骤210:显示设备对获得的原始音频信号进行解码。
步骤220:显示设备判断原始音频信号是否支持环绕声音效?若是,则执行步骤230;否则,执行步骤260。
具体的,在执行步骤220时,显示设备需要判断所述原始音频信号中包含的子音频信号的数目是否达到设定门限值,若是,则确定所述原始音频信号支持环绕音效,否则,确定所述原始音频信号不支持环绕音效。
在一些实施例中,原始音频信号中至少需要包含两路子音频信号,才能最低限度的实现环绕音效,如,一路子音频信号发往显示设备的音箱,可以同一路子音频信号通过显示设备的两个音箱进行播放,而另一路子音频信号发往蓝牙音箱,也可以同一路子音频信号通过两个蓝牙音箱进行播放。
本申请实施例中,以5.1声道原始音频信号为例进行说明,5.1声道原始音频信号中包括了六路子音频信号,分别为:左声道音频信号、右声道音频信号、中声道音频信号、左环绕声道音频信号、右环绕声道音频信号和低频声道音频信号,因此,5.1声道原始音频信号可以支持数字环绕音效(Digital Audio Effects,DTS)和杜比环绕音效(Dobly)等等。
步骤230:显示设备判断是否已与蓝牙音箱建立连接?若是,则执行步骤240;否则,执行步骤260。
此时,显示设备需要确定本地已与蓝牙音箱建立了连接,这样才能保证将各路子音频信号发往蓝牙音箱。
步骤240:显示设备读取所述原始音频信号中包含的多路子音频信号。
实际应用中,原始音频信号中本身已包含了多路子音频信号,直接读取即可,每一路子音频信号都携带有对应的标识信息,在后续过程中,会根据各路子音频信号对应的标识信息,分别将各路子音频信号发往对应位置的音箱。
具体的,显示设备可以采用数字信号处理器(Digital Signal Processing,DSP)实现上述方法,也可以中央处理器(Central Processing Unit,CPU)实 现上述方法,其中,采用DSP时,是通过硬件方式实现对原始音频信号的处理,采用CPU时,是通过软件方式实现对原始音频信号的处理,这两种方式将在后续实施例中进行详细介绍,在此不再赘述。
步骤250:显示设备在各路子音频信号中,将第一部分子音频信号发往显示设备壳体内的音箱进行播放,将第二部分子音频信号发往与显示设备无线连接的可移动的蓝牙音箱进行播放根据播放。
具体的,在执行步骤250时,显示设备可以采用以下方式:
针对各路子音频信号,将左声道音频信号发往显示设备的左音箱(也可称为第一音箱)进行播放,而将右声道音频信号发往显示设备的右音箱(也可称为第二音箱)进行播放;
针对各路子音频信号,将左环绕声道音频信号发往左蓝牙音箱进行播放,而将右环绕声道音频信号发往右蓝牙音箱进行播放。
进一步包括:若所述原始音频信号中进一步包括中声道音频信号,则所述显示设备在确定所述显示设备壳体中存在第三音箱时,将所述中声道音频信号发往所述第三音箱进行播放;
若所述原始音频信号中进一步包括低频音频信号,则所述显示设备在确定所述显示设备壳体内中存在第四音箱时,将所述低频音频信号发往所述第四音箱进行播放。
步骤260:显示设备将各路子音频信号发往显示设备内的音箱进行播放。
具体的,显示设备将左声道音频信号发往显示设备壳体内的左音箱进行播放,而将右声道音频信号发往显示设备壳体内的右音箱进行播放。
具体的,如图3所示,在上述实施例中,输入显示设备的原始音频信号为 5.1声道原始音频信号,也称为5.1Chs脉冲编码调制(Pulse Code Modulation,PCM),显示设备将5.1声道原始音频信号存储在音频信号缓存(Audio Buffer)中,然后通过信号分解,将5.1声道原始音频信号为两路的2声道音频信号,也称为2Chs PCM数据,其中,第一路2声道音频信号包含左声道音频信号和右声道音频信号,第二路2声道音频信号包含左环绕声道音频信号和右环绕声道音频信号。
第一路2声道音频信号通过数字模拟转换器(DAC)和功放(AMP)传输分别传送到显示设备的左音箱和右音箱,而第二路2声道音频信号蓝牙模块传输至左蓝牙音箱和右蓝牙音箱;其中,在输出至左蓝牙音箱和右蓝牙音箱之前,显示设备需要建立显示设备和蓝牙音箱之间的连接,连接成功后,第二路2声道音频信号是通过蓝牙音频传输模型协定(Advanced Audio Distribution Profile,A2DP)传输的。
在一些实施例中,本申请实施例过程中,上述步骤200-步骤260的分路过程可以采用硬件方案实现,也可以采用软件方案实现,下面分别进行介绍。
一方面,参阅图4所示,在采用硬件方案实现时,可以采用数字处理器(Digital Signal Processing,DSP)实现。DSP针对输入的5.1声道音频信号进行分离处理后,会设置各路子音频信号的音画同步声道参数,然后,将第一路子音频信号,包括左声道音频信号(记为Left),右声道音频信号(记为Right),中声道音频信号(记为Center),低频音频信号(记为LFE),通过数字模拟转换器和功放输出至显示设备壳体内的音箱进行播放,以及将第二路子音频信号,包括左环绕声道音频信号和右环绕声道音频信号,通过数字功放输出至蓝牙模块,进而输出至与显示设备无线连接的可移动的蓝牙音箱。
采用硬件方案时,主要是利用DSP强大的信号处理能力,将解码后的包含有多路子音频信号的音频数据流(Audio Stream)分别输出至显示设备壳体内的音箱和与显示设备无线连接的可移动的蓝牙音箱,同时,还可以利用DSP设置各路子音频信号的音画同步声道参数,使环绕声音效更好。
另一方面,参阅图5所示,在采用软件方案实现时,可以采用CPU中的音频处理线程实现。具体的,CPU将输入的5.1声道音频信号保存在音频缓存(Audio Buffer)中,然后,CPU会创建一个音频处理线程(Audio Thread),通过该Audio Thread,从Audio Buffer中读取5.1声道音频信号,然后,针对解码后的5.1声道音频信号,会设置各路子音频信号的音画同步声道参数,然后,将第一路子音频信号,包括左声道音频信号(记为Left),右声道音频信号(记为Right),中声道音频信号(记为Center),低频音频信号(记为LFE),通过数字模拟转换器和功放输出至显示设备壳体内的音箱进行播放,以及将第二路子音频信号,包括左环绕声道音频信号和右环绕声道音频信号,通过数字功放输出至蓝牙模块,进而输出至与显示设备无线连接的可移动的蓝牙音箱。
其中,当5.1声道音频信号输入时,会由Audio Buffer管理器(Manager)统一进行管理,即将各路子音频信号分别存储至5个buffer中,然后,通知Audio Thread,Audio Thread会从Audio Buffer Manager获取路子音频信号数据,经过后期处理后输出至显示设备壳体内的音箱和与显示设备无线连接的可移动的蓝牙音箱。
例如,参阅图6所示,本申请实施例中,5.1声道(即Chs)的音频信号,其格式如下:每个声道的音频信号占1个字节。
那么,参阅图7所示,本申请实施例中,以5.1声道音频信号为例,在软 件实现方案下,显示设备将其分离为两路的2声道音频信号的设计架构如下:
步骤a:显示设备将5.1声道音频信号(即原始音频信号)按照字节格式存入先入先出缓存〔(First Input First Output,FIFO)BUFFER〕中。
步骤b:显示设备通过输入处理模块(INPUT PROCESSOR)将FIFO BUFFER中的5.1声道音频信号按照字节格式传输至架构缓存(FRAME BUFFER)中。
步骤c:显示设备通过5.1声道脉冲编码调制分离模块(5.1CHS PCM SEPARATION MODULE)从FRAME BUFFER获取到5.1声道音频信号。
步骤d:显示设备通过5.1CHS PCM SEPARATION MODULE按照字节格式,将从FRAME BUFFER获取到的5.1声道音频数据中的各路子音频信号,分别存储至相应的5个数据缓存(DATA BUFFER)中,从而实现5.1声道音频信号的分离,即5.1Chs的PCM音频数据的分离。
步骤e:显示设备通过软件多路分配模块(SOFTWARE DEMUX MODULE)分别从5个DATA BUFFER中获取到分离后的各路子音频信号。
步骤f:显示设备通过SOFTWARE DEMUX MODULE将分离后的各路子音频信号传输至音频延时模块(AUDIO DELAY MODULE)中,分别进行音画同步处理,即设置音画同步声道参数。
步骤g:显示设备通过AUDIO DELAY MODULE将经过音画同步处理后的各路子音频信号回传至SOFTWARE DEMUX MODULE。
步骤h:显示设备通过SOFTWARE DEMUX MODULE将分离后的各路子音频信号,划分为两部分子音频信号,将第一部分子音频信号分别传输至显示设备壳体内的音箱,以及将第二部分子音频信号分别传输至各个与显示设备无 线连接的可移动的蓝牙音箱。
基于上述实施例,参阅图8所示,本申请实施例中,显示设备至少包括处理器80和存储器81,其中,
存储器81,用于保存获取的音频信号;
处理器80,用于获取原始音频信号,并判断所述原始音频信号是否支持环绕音效,获得判断结果;确定所述判断结果表征支持环绕音效时,读取所述原始音频信号中包含的多路子音频信号;以及针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放。
例如,本申请实施例中,原始音频信号的处理路径(Audio Path)如图9中的虚线部分所示,解码后的5.1声道原始音频信号经过音效处理后,通过显示设备中的音频分离模块(也可称为Audio Separation Module),将5.1声道音频信号分离为两路子音频信号,分别传输至显示设备壳体内的各个音箱和与显示设备无线连接的可移动的各个蓝牙音箱。
在一些实施例中,判断所述原始音频信号是否支持环绕音效,获得判断结果时,所述处理器80用于:
判断所述原始音频信号中包含的子音频信号的数目是否达到设定门限值,若是,则确定所述原始音频信号支持环绕音效,否则,确定所述原始音频信号不支持环绕音效。
在一些实施例中,确定所述判断结果表征支持环绕音效之后,将所述原始音频信号进行分路之前,所述处理器80进一步用于:
确定本地已与蓝牙音箱建立连接。
在一些实施例中,所述处理器为数字信号处理器(DSP),或者,所述处理器为中央处理器(CPU)。
在一些实施例中,针对各路子音频信号,将第一部分子音频信号发往显示设备壳体内的各个音箱进行播放,以及将第二部分子音频信号发往与显示设备无线连接的可移动的各个蓝牙音箱进行播放时,所述处理器80用于:
将所述原始音频信号按照字节格式存入先入先出缓存FIFO BUFFER中;
通过输入处理模块INPUT PROCESSOR将FIFO BUFFER中的原始音频信号按照字节格式传输至架构缓存FRAME BUFFER中;
通过脉冲编码调制分离模块PCM SEPARATION MODULE从所述FRAME BUFFER获取到所述原始音频信号,并按照字节格式,将所述原始音频信号中包含的各路子音频信号分别存储至相应的数据缓存DATA BUFFER中;
通过软件多路分配模块SOFTWARE DEMUX MODULE分别从各个DATA BUFFER中获取到各路子音频信号,并将所述各路子音频信号传输至音频延时模块AUDIO DELAY MODULE中,进行音画同步处理;
通过所述AUDIO DELAY MODULE将经过音画同步处理后的各路子音频信号回传至SOFTWARE DEMUX MODULE;
通过所述SOFTWARE DEMUX MODULE将各路子音频信号,划分为两部分子音频信号,将第一部分子音频信号分别传输至显示设备壳体内的各个音箱进行播放,以及将第二部分子音频信号分别传输至与显示设备无线连接的可移动的各个蓝牙音箱进行播放。
在一些实施例中,针对各路子音频信号,将第一部分子音频信号发往显示设备壳体内的音箱进行播放,以及将第二部分子音频信号发往与显示设备无线 连接的可移动的蓝牙音箱进行播放时,所述处理器80用于:
针对各路子音频信号,将左声道音频信号发往显示设备壳体内的左音箱进行播放,而将右声道音频信号发往显示设备壳体内的右音箱进行播放;
针对各路子音频信号,将左环绕声道音频信号发往与显示设备无线连接的左蓝牙音箱进行播放,而将右环绕声道音频信号发往与显示设备无线连接的右蓝牙音箱进行播放。
在一些实施例中,所述处理器80进一步用于:
若所述原始音频信号中进一步包括中声道音频信号,则所述显示设备在确定所述显示设备壳体中存在第三音箱时,将所述中声道音频信号发往所述第三音箱进行播放;
若所述原始音频信号中进一步包括低频音频信号,则所述显示设备在确定所述显示设备壳体中存在第四音箱时,将所述低频音频信号发往所述第四音箱进行播放。
基于同一发明构思,本申请实施例提供一存储介质,保存有用于实现音频信号播放的程序,所述程序被处理器运行时,执行以下步骤:
获取原始音频信号,并判断所述原始音频信号是否支持环绕音效,获得判断结果;
确定所述判断结果表征支持环绕音效时,读取所述原始音频信号中包含的多路子音频信号;
针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放;
其中,所述显示设备与所述蓝牙音箱分别位于用户两侧。
综上所述,本申请实施例中,显示设备获得原始音频信号后,若确定原始音频信号支持环绕声音效,则将原始音频信号中包含的子音频信号分离为两部分,将第一部分子音频信号发往固定在显示设备内部的音箱进行播放,而将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放,这样,便以最低的成本实现了环绕声音效,并且蓝牙音箱方便移动,布置简单,因此,适合广泛推广,从而有效提升了的产品竞争力和用户体验。
尽管已描述了本申请的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例作出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然,本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样,倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。

Claims (14)

  1. 一种显示设备中音频信号播放方法,,其特征在于,包括:
    获取原始音频信号,并判断所述原始音频信号是否支持环绕音效,获得判断结果;
    确定所述判断结果表征支持环绕音效时,读取所述原始音频信号中包含的多路子音频信号;
    针对各路子音频信号,将第一部分子音频信号发往所述显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放。
  2. 如权利要求1所述的方法,其特征在于,判断所述原始音频信号是否支持环绕音效,获得判断结果,包括:
    判断所述原始音频信号中包含的子音频信号的数目是否达到设定门限值,若是,则确定所述原始音频信号支持环绕音效,否则,确定所述原始音频信号不支持环绕音效。
  3. 如权利要求1所述的方法,其特征在于,确定所述判断结果表征支持环绕音效之后,将所述原始音频信号进行分路之前,进一步包括:
    确定本地已与蓝牙音箱建立连接。
  4. 如权利要求1、2或3任一所述的方法,其特征在于,所述方法由数字信号处理器DSP执行,或者,所述方法由中央处理器CPU执行。
  5. 如权利要求1、2或3任一所述的方法,其特征在于,针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放,包括:
    将所述原始音频信号按照字节格式存入先入先出缓存FIFO BUFFER中;
    通过输入处理模块INPUT PROCESSOR将FIFO BUFFER中的原始音频信号按照字节格式传输至架构缓存FRAME BUFFER中;
    通过脉冲编码调制分离模块PCM SEPARATION MODULE从所述FRAME BUFFER获取到所述原始音频信号,并按照字节格式,将所述原始音频信号中包含的各路子音频信号分别存储至相应的数据缓存DATA BUFFER中;
    通过软件多路分配模块SOFTWARE DEMUX MODULE分别从各个DATA BUFFER中获取到各路子音频信号,并将所述各路子音频信号传输至音频延时模块AUDIO DELAY MODULE中,进行音画同步处理;
    通过所述AUDIO DELAY MODULE将经过音画同步处理后的各路子音频信号回传至SOFTWARE DEMUX MODULE;
    通过所述SOFTWARE DEMUX MODULE将各路子音频信号,划分为两部分子音频信号,将第一部分子音频信号分别传输至显示设备内的音箱进行播放,以及将第二部分子音频信号分别传输至与显示设备连接的蓝牙音箱进行播放。
  6. 如权利要求1、2或3任一所述的方法,其特征在于,针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放,包括:
    针对各路子音频信号,将左声道音频信号发往显示设备内的左音箱进行播放,而将右声道音频信号发往显示设备内的右音箱进行播放;
    针对各路子音频信号,将左环绕声道音频信号发往与显示设备连接的左蓝牙音箱进行播放,而将右环绕声道音频信号发往与显示设备连接的右蓝牙音箱进行播放。
  7. 如权利要求6所述的方法,其特征在于,进一步包括:
    若所述原始音频信号中进一步包括中声道音频信号,则在确定所述显示设备中存在第三音箱时,将所述中声道音频信号发往所述第三音箱进行播放;
    若所述原始音频信号中进一步包括低频音频信号,则在确定所述显示设备中存在第四音箱时,将所述低频音频信号发往所述第四音箱进行播放。
  8. 一种显示设备,其特征在于,包括处理器和存储器,其中,
    存储器,用于保存获取的音频信号;
    所述处理器,用于获取原始音频信号,并判断所述原始音频信号是否支持环绕音效,获得判断结果;确定所述判断结果表征支持环绕音效时,读取所述原始音频信号中包含的多路子音频信号;以及针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放。
  9. 如权利要求8所述的显示设备,其特征在于,判断所述原始音频信号是否支持环绕音效,获得判断结果,包括:
    判断所述原始音频信号中包含的子音频信号的数目是否达到设定门限值,若是,则确定所述原始音频信号支持环绕音效,否则,确定所述原始音频信号不支持环绕音效。
  10. 如权利要求8所述的显示设备,其特征在于,确定所述判断结果表征支持环绕音效之后,将所述原始音频信号进行分路之前,进一步包括:
    确定本地已与蓝牙音箱建立连接。
  11. 如权利要求8、9或10任一所述的显示设备,其特征在于,针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将 第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放,包括:
    将所述原始音频信号按照字节格式存入先入先出缓存FIFO BUFFER中;
    通过输入处理模块INPUT PROCESSOR将FIFO BUFFER中的原始音频信号按照字节格式传输至架构缓存FRAME BUFFER中;
    通过脉冲编码调制分离模块PCM SEPARATION MODULE从所述FRAME BUFFER获取到所述原始音频信号,并按照字节格式,将所述原始音频信号中包含的各路子音频信号分别存储至相应的数据缓存DATA BUFFER中;
    通过软件多路分配模块SOFTWARE DEMUX MODULE分别从各个DATA BUFFER中获取到各路子音频信号,并将所述各路子音频信号传输至音频延时模块AUDIO DELAY MODULE中,进行音画同步处理;
    通过所述AUDIO DELAY MODULE将经过音画同步处理后的各路子音频信号回传至SOFTWARE DEMUX MODULE;
    通过所述SOFTWARE DEMUX MODULE将各路子音频信号,划分为两部分子音频信号,将第一部分子音频信号分别传输至显示设备内的音箱进行播放,以及将第二部分子音频信号分别传输至与显示设备连接的蓝牙音箱进行播放。
  12. 如权利要求8、9或10任一所述的显示设备,其特征在于,针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放,包括:
    针对各路子音频信号,将左声道音频信号发往显示设备内的左音箱进行播放,而将右声道音频信号发往显示设备内的右音箱进行播放;
    针对各路子音频信号,将左环绕声道音频信号发往与显示设备连接的左蓝牙音箱进行播放,而将右环绕声道音频信号发往与显示设备连接的右蓝牙音箱 进行播放。
  13. 如权利要求12所述的显示设备,其特征在于,进一步包括:
    若所述原始音频信号中进一步包括中声道音频信号,则在确定所述显示设备中存在第三音箱时,将所述中声道音频信号发往所述第三音箱进行播放;
    若所述原始音频信号中进一步包括低频音频信号,则在确定所述显示设备中存在第四音箱时,将所述低频音频信号发往所述第四音箱进行播放。
  14. 一种存储介质,其特征在于,保存有用于实现音频信号播放的程序,所述程序被处理器运行时,执行以下步骤:
    获取原始音频信号,并判断所述原始音频信号是否支持环绕音效,获得判断结果;
    确定所述判断结果表征支持环绕音效时,读取所述原始音频信号中包含的多路子音频信号;
    针对各路子音频信号,将第一部分子音频信号发往显示设备内的音箱进行播放,以及将第二部分子音频信号发往与显示设备连接的蓝牙音箱进行播放。
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