WO2013131367A1 - 多解码器音频***、***信号流程及其组成的移动设备 - Google Patents

多解码器音频***、***信号流程及其组成的移动设备 Download PDF

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Publication number
WO2013131367A1
WO2013131367A1 PCT/CN2012/082126 CN2012082126W WO2013131367A1 WO 2013131367 A1 WO2013131367 A1 WO 2013131367A1 CN 2012082126 W CN2012082126 W CN 2012082126W WO 2013131367 A1 WO2013131367 A1 WO 2013131367A1
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Prior art keywords
audio
channel
decoder
mobile device
earphone
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PCT/CN2012/082126
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English (en)
French (fr)
Inventor
陈天乐
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福兴达科技实业(深圳)有限公司
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Publication of WO2013131367A1 publication Critical patent/WO2013131367A1/zh

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    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16Vocoder architecture
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16Vocoder architecture
    • G10L19/18Vocoders using multiple modes
    • G10L19/22Mode decision, i.e. based on audio signal content versus external parameters
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/066Telephone sets adapted for data transmision

Definitions

  • Multi-decoder audio system system signal flow and its composed mobile device
  • the present invention relates to the field of decoder audio system technologies, and in particular, to a multi-decoder audio system, a system signal processing flow, and a mobile device composed of the system.
  • the I2S signal transmitted by the DSP Digital Signal Processor
  • DSP Digital Signal Processor
  • terminal devices such as headphones, telephone handsets, speakers, etc. to play audio in various formats, and can also accept input analog signals from microphones.
  • terminal devices such as headphones, telephone handsets, speakers, etc.
  • the output of different terminals can be switched by setting the codec internal path switch.
  • Patent Application No. 200920028574. 4 discloses an audio system capable of suppressing echo and a mobile communication device having the same, comprising an audio processing unit, a receiver, a speaker, a signal transmitting/receiving unit, and an application processor , audio codec and audio noise processor, the system can effectively eliminate system echo, suppress environmental noise, improve the quality of the audio signal output by the system. Applying it to a mobile communication device can improve the call quality of the device, thereby improving the overall performance of the device.
  • Patent No. 200810039494. 9 discloses a method and device for audio processing of a mobile terminal, so as to meet the requirements of low power consumption and high sound quality of the mobile terminal, by adding a special structure to the existing mobile terminal basic architecture.
  • the audio decoding chip separately processes different audio signals (MIDI, MP3, WAV, etc.), and when the audio decoding chip decodes, it performs bypass processing on the MIDI audio output by the baseband integrated circuit, and other format audio input to the storage device.
  • Decoding processing and setting the state of the baseband integrated circuit to a sleep state when the audio decoding chip is working, and adjusting the audio output device differently, adjusting The output signal amplitude of the volume reduces the power consumption, ensures the need for audio playback for a long time, and improves the audio playback quality, taking into account the different needs of the user for multimedia audio, so that it can be clear and smooth under different environments. Effect.
  • the audio decoder has to take care of various terminal devices to solve the problems of noise reduction and stereo echo cancellation, and the size of the IC is kept in a relatively small range, so the performance of the non-analog circuit must be sacrificed. This results in an audio system that does not match the sound quality of a proprietary audio audio chip.
  • the technical problem to be solved by the present invention is to provide a multi-decoder audio system capable of balancing various terminal devices, solving noise reduction, eliminating stereo echo, and the like.
  • a multi-decoder audio system including a central processing unit CPU, a digital signal processor DSP, a modem, the central processing unit CPU, a modulation regulator connected to the digital signal processor DSP Also includes at least one audio decoder.
  • the number of the audio decoders is two, the first audio decoder is an audio decoder for processing a voice call, and the second audio decoder is for processing multimedia audio.
  • the played audio decoder is connected to the digital signal processor DSP.
  • the first audio decoder is further connected to a digital microphone and a telephone handset
  • the second audio decoder is further connected to the earphone and the speaker.
  • the model of the first audio decoder is an 8200 series audio decoder
  • the model of the second audio decoder is a Mobile Sounds 3 audio decoder
  • Another object of the present invention is to provide a signal processing process for a multi-decoder audio system, including:
  • Audio playback process the audio file is converted into an I2S signal via a digital signal processor DSP under the control of a central processing unit CPU, and simultaneously transmitted to the first audio decoder and The second audio decoder determines, by the central processing unit CPU, which terminal device the audio should be output, and then opens the device path to play the audio file.
  • Voice call process opening the path of the handset and the microphone; the modem receives the pulse signal, and after processing, it is decoded by the digital signal processor DSP and transmitted to the handset, and the first audio decoder receives the analog signal entered by the microphone and converts it into an I2S signal. After being digitally processed by the digital signal processor DSP, it is converted into a pulse signal by a modem.
  • the process judged by the central processing unit CPU is implemented by software.
  • the present invention also provides a mobile device composed of the above multi-decoder audio system, the mobile device comprising the following six states:
  • State Z1 the digital microphone channel, the telephone handset channel, the earphone channel, and the speaker channel are all turned off;
  • State Z2 the digital microphone channel and the telephone handset channel are opened, and the earphone channel and the speaker channel are closed;
  • State Z3 the digital microphone channel, the earphone channel is turned on, the telephone handset channel, and the speaker channel are closed;
  • State Z4 the digital microphone channel and the speaker channel are turned on, and the telephone handset and the earphone channel are closed;
  • State Z5 the digital microphone channel, the telephone handset channel, the speaker channel are closed, and the earphone channel is turned on;
  • State Z6 The digital microphone channel, the telephone handset channel, and the earphone channel are closed, and the speaker channel is turned on.
  • the mobile device of the present invention further includes a music system and a button system, wherein the audio file of the music system is converted into an I2S signal and transmitted to the first audio via the digital signal processor DSP according to the control of the CPU of the central processing unit.
  • the decoder and the second audio decoder determine, by the central processing unit CPU, which terminal device the audio should be output, and then open the device path to play an audio file, and the button system triggers switching between the states of the mobile device.
  • the invention has the following beneficial effects:
  • the invention can ensure the sound of the voice call is normal and smooth, and can obtain the best sound quality when playing the audio file.
  • Figure 1 is a block diagram of the system of the present invention.
  • FIG. 2 is a system structural diagram of a mobile device of the present invention.
  • FIG. 3 is a diagram of switching between states of a mobile device of the present invention.
  • the present invention provides a multi-decoder audio system including a central processing unit CPU1, a digital signal processor DSP2, and a modem 3.
  • the central processing unit CPU1 and the modulation regulator 3 are connected to digital signals.
  • the processor DSP2 also includes at least one audio decoder.
  • the number of audio decoders of the present invention is two, that is, the first audio decoder 4 and the second audio decoder 5, wherein the first audio decoder 4 is an audio decoder that processes a voice call, and the second
  • the audio decoder 5 is an audio decoder that processes multimedia audio playback, and is respectively connected to the digital signal processor DSP2.
  • the first audio decoder 4 is also connected to the digital microphone 6, the telephone handset 7, and the second audio decoder 5 is also connected to the earphone 8 and the speaker 9.
  • the model of the first audio decoder 4 is an 8200 series audio decoder
  • the model of the second audio decoder 5 is a Mobi le Sounds 3 audio decoder.
  • the audio playing process the audio file is at the center Under the control of the processor CPU1, it is converted into an I2S signal via the digital signal processor DSP2, and simultaneously transmitted to the first audio decoder 4 and the second audio decoder 5, and the central processing unit CPU1 determines which terminal device the audio should be output. Then open the device path and play the audio file.
  • Voice call process opening the path of the handset 7 and the microphone 8; the modem 3 receives the pulse signal, and after processing, the digital signal processor DSP2 decodes and transmits it to the handset 7 while the first audio decoder 4 receives the simulation of the microphone 6 entering.
  • the signal is converted into an I2S signal, which is digitally processed by the digital signal processor DSP2 and then converted into a pulse signal by the modem 3.
  • Another mobile device product comprising the multi-decoder audio system of the present invention further includes a music system 10 and a button system 12, the mobile device comprising the following six states:
  • the digital microphone 6 channels, the handset 7 channel, the earphone 8 channel, and the speaker 9 channels are all off, that is, the mobile device is in a state of not answering the call and not playing music.
  • State Z2 The digital microphone 6 channels, the telephone handset 7 channels are open, the earphone 8 channels, the speaker 9 channels are closed, that is, the mobile device uses the digital microphone 6 and the telephone handset 7 to answer the call.
  • State Z3 The digital microphone 6 channels, the earphone 8 channels are turned on, the telephone handset 7 channels, the speaker 9 channels are closed, that is, the mobile device uses the digital microphone 6 and the earphone 8 to answer the call.
  • State Z4 The digital microphone 6 channels, the speaker 9 channels are turned on, the telephone handset 7, the earphone 8 channel channel is closed, that is, the mobile device uses the digital microphone 6 and the speaker 9 to answer the call.
  • State Z5 The digital microphone 6 channels, the telephone handset 7 channels, the speaker 9 channels are closed, and the earphone 8 channels are turned on, that is, the mobile device uses the earphone 8 to listen to music.
  • State Z6 The digital microphone 6 channel, the telephone handset 7 channel, the earphone 8 channel are closed, the speaker channel 9 is turned on, that is, the mobile device uses the speaker 9 to listen to music.
  • the audio file of the music system 10 is converted into an I2S signal via the digital signal processor DSP2 according to the control of the central processing unit CPU1, and simultaneously transmitted to the first audio decoder 4 and the second audio decoder 5 through the central processing.
  • the CPU 1 determines at which terminal device the audio should be output, then opens the device path to play an audio file, and the button system 12 triggers switching between the states of the mobile device.
  • FIG. 3 a flowchart of the switching between the state Z1 and the state Z6 of the mobile device of the present invention, the following specifically illustrates how the mobile device switches between states.
  • the mobile device When the mobile device is in the Z1 state, that is, the mobile device is in a state of not answering the call and not playing music. At this time, if there is an incoming call and the button system 12 is used for answering, the mobile device enters the Z2 working state (using the digital microphone 6 and When the music is played by the button system 12, according to the central processor CPU1 detecting and judging whether the mobile device is inserted into the earphone 8 and entering the Z6 or Z5 state, the earphone 8 is inserted into the Z5 state (using the earphone 8) Listening to music), the microphone 6 is not inserted and enters the Z6 state (using the speaker 9 to listen to music).
  • the digital microphone 6 and the telephone handset 7 are used to answer the call, and the person answering the call selects whether to insert the earphone 8 according to the need. If the earphone 8 is selected to be inserted, the mobile device enters the Z3 working state (using The digital microphone 6 and the earphone 8 make an answering call); if the person answering the call does not insert the earphone 8, the mobile device is always in the Z2 working state (using the digital microphone 6 and the telephone handset 7 to answer the call) until the call is completed, and the answering person passes The button system 12 hangs up the phone. At this time, the central processing unit CPU1 detects whether there is music playing in the system. If there is music playing, the mobile device directly enters the Z6 working state (using the speaker 9 to listen to music), if no music is played, The mobile device enters the Z1 working state (the mobile device is in a state of not answering the call and playing music).
  • the mobile device When the mobile device is in the Z3 working state (using the digital microphone 6 and the earphone 8 to answer the call), the mobile device answers the call according to the state, and if the hands-free on the button system 12 is further turned on, the mobile device enters the Z4 working state ( Using the digital microphone 6 and the speaker 9 to answer the call), such as pulling out the earphone 8, the mobile device re-enters the Z2 working state (using the digital microphone 6 and the telephone handset 7 to answer the call), Otherwise, the mobile device is always in the Z3 state (using the digital microphone 6 and the earphone 8 to answer the call) until the call is completed, and the phone is hung up by the button system 12, and the CPU 1 detects that the music is played in the system, if there is music playing.
  • the mobile device directly enters the Z5 working state (using the earphone 8 to listen to music), and if there is no music playing, the mobile device directly enters the Z1 working state (the mobile device is in a state of not answering the phone and not playing music).
  • the mobile device When the mobile device is in the Z4 working state, that is, the digital microphone 6 and the speaker 9 are used to answer the call, such as turning off the hands-free by the button system 12, the mobile device re-enters the Z3 working state (using the digital microphone 6 and the earphone 8 to answer the call) .
  • the mobile device When the mobile device is in the Z5 working state, that is, the earphone 8 is used to listen to music, such as the earphone 8 is pulled out, the mobile device enters the Z6 working state (using the speaker 9 to listen to music), and if the phone dials in, the mobile device is restarted. Enter the Z3 working state (use the digital microphone 6 and the headset 8 to answer the call).
  • the mobile device When the mobile device is in the Z6 working state (ie, listening to music using the speaker 9), such as inserting the earphone 8, the mobile device enters the Z5 working state (using the earphone 8 to listen to music), and if the phone is dialed in, the mobile device is restarted. Enter the Z2 working state (ie, use the digital microphone 6 and the telephone handset 7 to answer the call).
  • the Z6 working state ie, listening to music using the speaker 9
  • the mobile device enters the Z5 working state (using the earphone 8 to listen to music), and if the phone is dialed in, the mobile device is restarted.
  • Enter the Z2 working state ie, use the digital microphone 6 and the telephone handset 7 to answer the call).

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  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Telephone Function (AREA)

Abstract

本发明涉及解码器音频***技术领域,具体涉及一种多解码器音频***,包括中央处理器CPU、数字信号处理器DSP、调制解调器,所述中央处理器CPU、调制调节器连接于数字信号处理器DSP,还包含至少一个音频解码器,本发明还提供一种由多解码器音频***组成的移动设备。本发明的音频解码***以及其组成的移动设备具有既能保证在语音通话时声音的正常顺畅又能使在播放音频文件时得到最好的音质。

Description

多解码器音频***、 ***信号流程及其组成的移动设备
【技术领域】
本发明涉及解码器音频***技术领域, 具体涉及一种多解码器音 频***、 ***信号处理流程以及由该***组成的移动设备。
【背景技术】
近几年移动设备发展迅猛, 尤其是智能手机的变化日新月异, 音频、视频、 图像等解码器的技术同样也在不断的更新, 其中智能手 机的音频技术也逐渐成熟, 手机中的音频编解码器可以通过接受
DSP (数字信号处理器)传递过来的 I2S信号并转换成模拟信号传送给 如耳机, 电话听筒, 扬声器之类的终端设备来播放各种格式的音频, 同时也可以接受来自麦克风等输入模拟信号转化为数字信号进行存 储, 当音频播放时, 可以通过设置编解码器内部通路开关来切换不同 终端的输出。
专利号为 200920028574. 4 的实用新型专利公布了一种可抑制 回音的音频***及具有该***的移动通信设备, 其包括音频处理单 元、 受话器、 喇叭、 信号发射 /接收单元, 还包括应用处理器、 音频 编解码器和音频噪声处理器, 该***可以有效消除***回音,抑制环 境噪声,提高***输出的音频信号质量。 将其应用于移动通信设备中 可以改善设备的通话质量,进而提升设备的整机性能。
专利号为 200810039494. 9 的发明专利公布了一种移动终端音 频处理的方法及其装置,以达到对移动终端功率低消耗、 音质高标准 的要求, 通过对现有的移动终端基本架构添加专门的音频解码芯片, 对不同音频信号 (MIDI、 MP3、 WAV等格式)进行分别处理,在音频解码 芯片解码时,即对基带集成电路输出的 MIDI音频作旁通处理、对存储 设备输入的其他格式音频作解码处理,并在当音频解码芯片工作时将 基带集成电路状态设置成休眠状态,再结合音频输出设备不同,调整 音量的输出信号幅值,从而减小了功耗,保证较长时间音频播放的需 要,同时提高音频播放质量,兼顾了用户对于多媒体音频的不同需要, 使之在不同环境下都能达到清晰流畅的效果。
正因为音频解码器要兼顾各种终端设备, 解决降噪音、 消除立 体声回音等问题, 同时 IC的大小还要保持在一个相对比较小的范围 内, 因此非模拟电路的效能就必须有所牺牲, 这样致使音频***的音 质就无法与专属音频音讯芯片的音质相媲美。
【发明内容】
本发明要解决的技术问题是提供一种能兼顾各种终端设备,解决 降噪音, 消除立体声回音等的多解码器音频***。
本发明是通过以下技术方案来实现的, 一种多解码器音频***, 包括中央处理器 CPU、 数字信号处理器 DSP、 调制解调器, 所述中央 处理器 CPU、 调制调节器连接于数字信号处理器 DSP, 还包含至少一 个音频解码器。
优选的, 本发明的多解码器音频***, 所述音频解码器个数为 2 个, 所述第一音频解码器为处理语音通话的音频解码器,所述第二音 频解码器为处理多媒体音频播放的音频解码器,二者分别与数字信号 处理器 DSP相连。
优选的, 本发明的多解码器音频***, 所述第一音频解码器还与 数字麦克风、 电话听筒相连, 所述第二音频解码器还与耳机、扬声器 相连。
优选的, 本发明的多解码器音频***,所述第一音频解码器的型 号为 8200 系列音频解码器, 所述第二音频解码器的型号为 Mobile Sounds 3音频解码器。
本发明的另一目的是提供一种多解码器音频***的信号处理流 程, 具体包括:
音频播放过程: 所述音频文件在中央处理器 CPU的控制下, 经由 数字信号处理器 DSP转化为 I2S信号,同时传递给第一音频解码器和 第二音频解码器,通过中央处理器 CPU判断此音频应该在哪个终端设 备输出, 然后打开该设备通路, 播放音频文件。
语音通话过程: 打开所述电话听筒和麦克风的通路; 调制解调器 接收脉冲信号, 处理后经过数字信号处理器 DSP 解码传递给电话听 筒, 同时第一音频解码器接收麦克风进入的模拟信号, 转化为 I2S信 号,经过数字信号处理器 DSP做数字处理后由调制解调器转化为脉冲 信号发出。
优选的, 本发明的多解码器音频***, 所述中央处理器 CPU判断 的过程是通过软件实现的。
本发明还提供一种上述多解码器音频***组成的移动设备,所述 移动设备包括以下 6种状态:
状态 Z1 : 所述数字麦克风通道、 电话听筒通道、 耳机通道、 扬 声器通道均关闭;
状态 Z2 : 所述数字麦克风通道、 电话听筒通道开启, 所述耳机 通道、 扬声器通道关闭;
状态 Z3 : 所述数字麦克风通道、 耳机通道开启, 所述电话听筒 通道、 扬声器通道关闭;
状态 Z4: 所述数字麦克风通道、 扬声器通道开启, 所述电话听 筒、 耳机通道通道关闭;
状态 Z5 : 所述数字麦克风通道、 电话听筒通道、 扬声器通道关 闭, 所述耳机通道开启;
状态 Z6: 所述数字麦克风通道、 电话听筒通道、 耳机通道关闭, 所述扬声器通道幵启。
优选的, 本发明的移动设备, 还包括音乐***、 按键***, 所述 音乐***的音频文件根据中央处理器 CPU的控制下,经由数字信号处 理器 DSP转化为 I2S信号,同时传递给第一音频解码器和第二音频解 码器, 通过中央处理器 CPU判断此音频应该在哪个终端设备输出, 然 后打开该设备通路, 播放音频文件, 所述按键***触发所述移动设备 状态之间的切换。 本发明具有如下有益效果:
1、使用二个音频解码器, 从而使移动设备即能拥有更好的音质, 在听音乐时随意设置音频均衡器, 重低音等音效, 带来更好的用户体 验, 又能兼顾到麦克风, 电话听筒等终端设备。
2、 本发明既能保证语音通话时声音正常顺畅又能使播放音频文 件时得到最好的音质。
【附图说明】
为了易于说明, 本发明由下述的较佳实施例及附图作以详细描 述。
图 1为本发明的***结构图。
图 2为本发明的移动设备的***结构图。
图 3为本发明的移动设备状态之间的切换图。
【具体实施方式】
参见图 1-图 2所示, 本发明提供一种多解码器音频***, 包括 中央处理器 CPU1、 数字信号处理器 DSP2、 调制解调器 3, 所述中央 处理器 CPU1、 调制调节器 3连接于数字信号处理器 DSP2, 还包含至 少一个音频解码器。本发明的音频解码器个数为 2个, 即第一音频解 码器 4和第二音频解码器 5, 其中, 所述第一音频解码器 4为处理语 音通话的音频解码器,所述第二音频解码器 5为处理多媒体音频播放 的音频解码器, 二者分别与数字信号处理器 DSP2相连。 且所述第一 音频解码器 4还与数字麦克风 6、 电话听筒 7相连, 所述第二音频解 码器 5还与耳机 8、 扬声器 9相连。
具体的,所述第一音频解码器 4的型号为 8200系列音频解码器, 所述第二音频解码器 5的型号为 Mobi le Sounds 3音频解码器。
具体的,按照上述的的多解码器音频***的音频解码流程,共包 括以下二个信号处理流程, 即音频播放过程:所述音频文件在中央处 理器 CPU1的控制下, 经由数字信号处理器 DSP2转化为 I2S信号, 同 时传递给第一音频解码器 4 和第二音频解码器 5, 通过中央处理器 CPU1 判断此音频应该在哪个终端设备输出, 然后打开该设备通路, 播放音频文件。语音通话过程: 打开所述电话听筒 7和麦克风 8的通 路; 调制解调器 3接收脉冲信号, 处理后经过数字信号处理器 DSP2 解码传递给电话听筒 7, 同时第一音频解码器 4接收麦克风 6进入的 模拟信号, 转化为 I2S信号, 经过数字信号处理器 DSP2做数字处理 后由调制解调器 3转化为脉冲信号发出。
本发明的另一个由所述的多解码器音频***组成的移动设备产 品, 还包括音乐*** 10、 按键*** 12, 所述移动设备包括以下 6种 状态:
状态 Z1 : 所述数字麦克风 6通道、 电话听筒 7通道、 耳机 8通 道、扬声器 9通道均关闭, 即移动设备处于未接听电话和未播放音乐 的状态。
状态 Z2 : 所述数字麦克风 6通道、 电话听筒 7通道开启, 所述 耳机 8通道、扬声器 9通道关闭, 即移动设备使用数字麦克风 6以及 电话听筒 7进行接听电话。
状态 Z3 : 所述数字麦克风 6通道、 耳机 8通道开启, 所述电话 听筒 7通道、扬声器 9通道关闭, 即移动设备使用数字麦克风 6以及 耳机 8进行接听电话。
状态 Z4 : 所述数字麦克风 6通道、 扬声器 9通道开启, 所述电 话听筒 7、 耳机 8通道通道关闭, 即移动设备使用数字麦克风 6以及 扬声器 9进行接听电话。
状态 Z5 : 所述数字麦克风 6通道、 电话听筒 7通道、 扬声器 9 通道关闭, 所述耳机 8通道开启, 即移动设备使用耳机 8进行收听音 乐。
状态 Z6: 所述数字麦克风 6通道、 电话听筒 7通道、 耳机 8通 道关闭, 所述扬声器通道 9开启, 即移动设备使用扬声器 9进行收听 音乐。 其中,所述音乐*** 10的音频文件根据中央处理器 CPU1的控制 下, 经由数字信号处理器 DSP2转化为 I2S信号, 同时传递给第一音 频解码器 4和第二音频解码器 5, 通过中央处理器 CPU1判断此音频 应该在哪个终端设备输出, 然后打开该设备通路, 播放音频文件, 所 述按键*** 12触发所述移动设备状态之间的切换。
参见图 3所示,本发明的移动设备在状态 Z1至状态 Z6之间的切 换流程图, 下面具体来说明移动设备是如何在各个状态之间切换的。
当移动设备处于 Z1状态时, 即移动设备处于未接听电话和未播 放音乐的状态, 此时, 如有拨入电话并用按键*** 12进行接听时, 移动设备进入 Z2工作状态 (使用数字麦克风 6以及电话听筒 7进行接 听电话); 如用按键*** 12播放音乐时, 根据中央处理器 CPU1检测 并判断移动设备是否***耳机 8而进入 Z6或者 Z5状态,即有***耳 机 8进入 Z5状态 (使用耳机 8进行收听音乐), 未***耳机 8则进入 Z6状态 (使用扬声器 9进行收听音乐)。
当移动设备处于 Z2工作状态时, 即使用数字麦克风 6以及电话 听筒 7进行接听电话,由接听电话的人根据需要选择是否***耳机 8, 如选择***耳机 8, 则移动设备进入 Z3工作状态 (使用数字麦克风 6 以及耳机 8进行接听电话); 如接听电话的人员不***耳机 8, 则移 动设备一直处于 Z2工作状态 (使用数字麦克风 6以及电话听筒 7进行 接听电话), 直至通话完成, 接听人员通过按键*** 12挂断电话, 此 时中央处理器 CPU1检测判断***中是否有音乐播放,如有音乐播放, 则移动设备直接进入 Z6工作状态 (使用扬声器 9进行收听音乐), 如 无音乐播放,则移动设备进入 Z1工作状态 (移动设备处于未接听电话 和未播放音乐的状态)。
当移动设备处于 Z3工作状态时 (使用数字麦克风 6以及耳机 8 进行接听电话), 移动设备按照此种状态接听电话, 如再进一步开启 按键*** 12上的免提, 则移动设备进入 Z4工作状态 (使用数字麦克 风 6以及扬声器 9进行接听电话), 如拔出耳机 8, 则移动设备重新 进入 Z2工作状态 (使用数字麦克风 6以及电话听筒 7进行接听电话), 否则移动设备一直处于 Z3状态 (使用数字麦克风 6以及耳机 8进行接 听电话), 直至通话完成, 通过按键*** 12挂断电话, 此时中央处理 器 CPU1检测判断***中是否播放音乐, 如有音乐播放, 则移动设备 直接进入 Z5工作状态 (使用耳机 8进行收听音乐), 如无音乐播放, 则移动设备直接进入 Z1 工作状态 (移动设备处于未接听电话和未播 放音乐的状态)。
当移动设备处于 Z4工作状态时, 即使用数字麦克风 6以及扬声 器 9进行接听电话, 如通过按键*** 12关闭免提, 则移动设备重新 进入 Z3工作状态 (使用数字麦克风 6以及耳机 8进行接听电话)。
当移动设备处于 Z5工作状态时, 即使用耳机 8进行收听音乐, 如拔出耳机 8, 则移动设备进入 Z6工作状态 (使用扬声器 9进行收听 音乐), 如有电话拨入时, 则移动设备重新进入 Z3工作状态 (使用数 字麦克风 6以及耳机 8进行接听电话)。
当移动设备处于 Z6工作状态时(即使用扬声器 9进行收听音乐), 如***耳机 8, 则移动设备进入 Z5工作状态 (使用耳机 8进行收听音 乐), 如有电话拨入时, 则移动设备重新进入 Z2工作状态 (即使用数 字麦克风 6以及电话听筒 7进行接听电话)。
以上所述之具体实施方式为本发明的较佳实施方式,并非以此限 定本发明的具体实施范围,本发明的范围包括并不限于本具体实施方 式。 凡依照本发明之形状、 结构所作的等效变化均包含本发明的保护 范围内。

Claims

权利 要 求
1. 一种多解码器音频***, 包括中央处理器 CPU (1)、 数字信号 处理器 DSP (2)、调制解调器 (3), 所述中央处理器 CPU (1)、 调制调节 器 (3)连接于数字信号处理器 DSP (2), 其特征在于: 还包含至少一个 音频解码器。
2. 根据权利要求 1所述的多解码器音频***, 其特征在于: 所 述音频解码器个数为 2个, 所述第一音频解码器 (4)为处理语音通话 的音频解码器, 所述第二音频解码器 (5)为处理多媒体音频播放的音 频解码器, 二者分别与数字信号处理器 DSP (2)相连。
3. 根据权利要求 2所述的多解码器音频***, 其特征在于: 所 述第一音频解码器 (4)还与数字麦克风 (6)、 电话听筒 (7)相连, 所述 第二音频解码器 (5)还与耳机 (8)、 扬声器 (9)相连。
4. 根据权利要求 3所述的多解码器音频***, 其特征在于: 所 述第一音频解码器 (4)的型号为 8200系列音频解码器,所述第二音频 解码器(5)的型号为 Mobi le Sounds 3音频解码器。
5. —种根据权利要求 4所述的多解码器音频***的信号处理流 程, 其特征在于包括:
音频播放过程: 所述音频文件在中央处理器 CPU (l)的控制下, 经由数字信号处理器 DSP (2)转化为 I2S信号, 同时传递给第一音频 解码器 (4)和第二音频解码器 (5), 通过中央处理器 CPU (1)判断此音 频应该在哪个终端设备输出, 然后打开该设备通路, 播放音频文件。
语音通话过程: 打开所述电话听筒 (7)和麦克风 (8)的通路; 调制 解调器 (3)接收脉冲信号, 处理后经过数字信号处理器 DSP (2)解码传 递给电话听筒 (7), 同时第一音频解码器 (4)接收麦克风 (6)进入的模 拟信号, 转化为 I2S信号, 经过数字信号处理器 DSP (2)做数字处理 后由调制解调器 (3)转化为脉冲信号发出。
6. 根据权利要求 5所述的信号处理流程, 其特征在于: 所述中 央处理器 CPU (l)判断的过程是通过软件实现的。
7. 一种根据权利要求 4所述的多解码器音频***组成的移动设 备, 其特征在于, 所述移动设备包括以下 6种状态:
状态 Z1 : 所述数字麦克风 (6)通道、 电话听筒 (7)通道、 耳机 (8) 通道、 扬声器 (9)通道均关闭;
状态 Z2: 所述数字麦克风 (6)通道、 电话听筒 (7)通道开启, 所 述耳机 (8)通道、 扬声器 (9)通道关闭;
状态 Z3: 所述数字麦克风 (6)通道、 耳机 (8)通道开启, 所述电 话听筒 (7)通道、 扬声器 (9)通道关闭;
状态 Z4: 所述数字麦克风 (6)通道、 扬声器 (9)通道开启, 所述 电话听筒 (7)、 耳机 (8)通道通道关闭;
状态 Z5: 所述数字麦克风 (6)通道、 电话听筒 (7)通道、 扬声器 (9)通道关闭, 所述耳机 (8)通道开启;
状态 Z6: 所述数字麦克风 (6)通道、 电话听筒 (7)通道、 耳机 (8) 通道关闭, 所述扬声器通道 (9)开启。
8. 根据权利要求 7所述的移动设备, 其特征在于: 还包括音乐 ***(10)、按键***(12), 所述音乐***(10)的音频文件根据中央处 理器 CPU (l)的控制下,经由数字信号处理器 DSP (2)转化为 I2S信号, 同时传递给第一音频解码器 (4)和第二音频解码器 (5),通过中央处理 器 CPU (1)判断此音频应该在哪个终端设备输出, 然后打开该设备通 路, 播放音频文件, 所述按键***(12)触发所述移动设备在状态 Z1 至 Z6之间进行切换。
PCT/CN2012/082126 2012-03-07 2012-09-27 多解码器音频***、***信号流程及其组成的移动设备 WO2013131367A1 (zh)

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