201019318 九、發明說明： 【發明所屬之技術領域】 特別涉及一種音頻處理系 本發明涉及電子技術領域 統。 【先前技術】 一般具有音頻輸出 還具有播放外部輸 品的喇π八來播放外 目前數碼電子產品如可攜式DVD 和音頻播放功能’另外，一些電子產品 φ入的音頻訊號的功能，即利用該電子產 部輸入的音頻訊號。 具有播放外部輸入音頻訊號功能的電子產品包括音 頻處理模組、控制模組、存儲模組、音頻放大模組、音： 輸入輸出模組以及聲音重放裝置。當需要播放音樂時，操 作該控制模組，使控制模組產生控制訊號；該音頻處理模 組回應該控制訊號對存儲模組中存儲的音頻文件進行解 碼，並輸出音頻文件解碼後的音頻訊號；該音頻放大模組 〇對音頻處理模組輸出的音頻訊號進行放大處理，並輸出適 合驅動聲音重放裝置的驅動訊號，以使聲音重放裝置重放 該音頻訊號所承載的聲音或音樂。該音頻輸入輸出模組與 該音頻處理模組和音頻放大模組相連，用於輸出音頻處理 模組輸出的音頻訊號。 當需要利用電子產品的聲音重放裝置重放外部輸入 的曰頻訊號時，#由電子產品的音頻輸入輸出模組接收外 部音頻訊號，並將該外部音頻訊號傳輸至音頻放大模組進 行放大處理，得到驅動聲音重放裝置的驅動訊號。 201019318 然而，由於音頻輸入輸出模組還盥立 連:藉由音頻輸入輸出模組接收的外部V頻訊號理= 目 二=入音頻處理模組’進而損失該部分流入音頻ίί =:頻訊號，造成該外部音頻訊號的衰減，影響電子 產品播放外部音頻的效果。 等电于 【發明内容】 ❹ =此，有必要提供一種降低外部輸入 音頻處理系統。 -種音頻處理系統包括控制單S、第—處理單元、存 儲單元、轉換單元、播放單元、輸入輸出單元、開關單元 以及節點’該控制單元用於根據用戶的操作產生觸發訊 號，該存儲單元用於存儲音頻文件，該第一處理單元用於 回應該觸發訊號對該存儲的音頻文件進行解碼，並輸出第 -音頻訊號’該轉換單元用於將該第一音頻訊號轉換為驅 動訊號，該播放單元用於接收該驅動訊號，並播放該驅動 ❹吼號所承載的聲音，該控制單元在產生觸發訊號的同時還 產生開關訊號’該開關單元用於響應該開關訊號將該第一 處理單70與節點連接，並將該第一音頻訊號傳輸至與該節 點相連的轉換單70和輸入輸出單元，該開關單元還用於在 接收不到該開關訊號時斷開第一處理單元與節點之間的 連接，該輸入輸出單元還用於接收外部音頻訊號，該外部 音頻訊號藉由該節點傳輸至該轉換單元，該轉換單元還用 於將該外部輸入的音頻訊號轉換為驅動訊號。 如上該的音頻處理系統，藉由開關單元回應開關訊號 8 201019318 連接第一處理單元與節點，以將第一音頻訊號傳輸至轉換 單元和輸入輸出單元，並在開關單元接收不到開關訊號 時’斷開第一處理單元與節點之間的連接，以使輸入輸出 單元接收的外部音頻訊號不被傳輸至第一處理單元和開 關單凡’有效地防止該外部音頻訊號被衰減。 【實施方式】 如圖1所示’一較佳實施方式的音頻處理系統100包 ❹括控制單元1〇1、第一處理單元103、存儲單元105、開關 單70 1〇7、轉換單元109、播放單元111、輸入輸出單元113、 第二處理單元115以及節點120。 ”控制單元基於用戶的操作產生觸發訊號和開關訊 號二並分別傳輸至第一處理單元1〇3和開關單元;控 制單7L 101還基於用戶的操作停止產生觸發訊號和開關訊 存儲單70 105帛於存儲音頻文件。該音頻文件可為 ❹㈣音頻文件、WMA纟頻文件，或其他包括音頻文件的 文件夾。該存儲單元105也可以是一個硬碟。 處理早疋1〇3用於接收並回應該觸發訊號對存 =兀⑽中存㈣音敎件進行解碼，絲 ;至開關單元1〇7。本實施方式中，第-處理單元103: 括解碼模組、數模轉換模組以 ^ 的音頻文件進行解媽輸出數位音 頻μ，該數模轉換模組用於對該數位音頻訊號進行轉換 201019318 輸出類比音頻訊號；放大模組用於對該類比音頻訊號進行 放大處理並輸出第一音頻訊號。 開關單元107用於回應該開關訊號連接第一處理單元 1〇3與節點120,以將該第一音頻訊號藉由節點ι2〇輸出至 轉換單元109和輸入輸出單元113。該開關單元1〇7還在 接收不到該開關訊號時，斷開第一處理單元1〇3與節點12〇 之間的連接。 第二處理單元115用於接收該第一音頻訊號，並對該 ❹第一音頻訊號進行處理，如過濾第一音頻訊號中的雜訊， 同時將處理後的第一音頻訊號藉由輸入輸出單元113向外 輸出。第一處理卓元115可以是濾波電路。 輸入輸出單元113還用於接收外部輸入的音頻訊號。 該輸入輸出單元113可以是一個3.5毫米的耳機插孔。第 一處理單元115還用於接收來自輸入輸出單元113的音頻 訊號，並對該外部音頻訊號進行處理，以消減該音頻訊號 ❿中的雜訊’並得到第二音頻訊號。該第二音頻訊號藉由節 點120傳輪至轉換單元1〇9。 轉換單元109用於對分別來自第一處理單元1〇3和第 二處理單元⑴的第-音頻訊號和第二音頻訊號進行放大 轉換，得到能夠驅動該播放單元U1的驅動訊號。該轉換 單元109在本實施方式中為訊號放大裝置。 播放單元m為喇叭’用於接收該驅動訊號，以播放 該驅動訊號所承載的音頻。 當需要用播放單A 111播放外部音頻時，控制單元皿 201019318 號，開關單元 元103與節點 115輪出的第 109時不被分 而有效地防止 接收用戶的操作停止產生觸發訊號和開關訊 107接收不到該開關訊號而斷開第一處理單 120之間的連接’以使該藉由第二處理單元 二音頻訊號在藉由節點120傳輸至轉換單元 流至第二處理單元1〇3和開關單元ι〇7，從 該第二音頻訊號被衰減，提高音質。 圖式簡單說明】201019318 IX. Description of the invention: [Technical field to which the invention pertains] In particular, the present invention relates to the field of electronic technology. [Prior Art] Generally, the audio output also has the function of playing external products, such as portable DVD and audio playback functions. In addition, some electronic products have the function of audio signals, that is, the use of audio signals. The audio signal input by the electronics department. Electronic products having an external input audio signal function include an audio processing module, a control module, a storage module, an audio amplification module, and an audio input/output module and a sound reproduction device. When the music needs to be played, the control module is operated to cause the control module to generate a control signal; the audio processing module returns a control signal to decode the audio file stored in the storage module, and outputs the decoded audio signal of the audio file. The audio amplification module amplifies the audio signal output by the audio processing module, and outputs a driving signal suitable for driving the sound reproducing device, so that the sound reproducing device plays back the sound or music carried by the audio signal. The audio input and output module is connected to the audio processing module and the audio amplification module, and is configured to output an audio signal output by the audio processing module. When it is required to reproduce an externally input chirp signal by using the sound reproduction device of the electronic product, #the external audio signal is received by the audio input and output module of the electronic product, and the external audio signal is transmitted to the audio amplification module for amplification processing. A drive signal for driving the sound reproducing device is obtained. 201019318 However, because the audio input and output module is still connected: the external V-frequency signal received by the audio input and output module = the second audio = input audio processing module 'and then loses the part of the incoming audio ίί =: frequency signal, The attenuation of the external audio signal affects the effect of the external audio played by the electronic product. Isoelectricity [Content of the invention] ❹ = This is necessary to provide an audio processing system that reduces external input. An audio processing system includes a control unit S, a processing unit, a storage unit, a conversion unit, a playback unit, an input and output unit, a switch unit, and a node. The control unit is configured to generate a trigger signal according to a user operation, and the storage unit uses For storing the audio file, the first processing unit is configured to: decode the stored audio file by the trigger signal, and output the first audio signal. The conversion unit is configured to convert the first audio signal into a driving signal, and the playing The unit is configured to receive the driving signal and play the sound carried by the driving nickname, and the control unit generates a switching signal while generating the trigger signal. The switching unit is configured to respond to the switching signal to the first processing unit 70. Connecting to the node, and transmitting the first audio signal to the conversion unit 70 and the input and output unit connected to the node, the switch unit is further configured to disconnect between the first processing unit and the node when the switch signal is not received Connection, the input and output unit is further configured to receive an external audio signal, the external audio signal by the node Input to the conversion unit, the conversion unit is further used to externally input the audio signal into a driving signal. In the audio processing system as described above, the switching unit responds to the switching signal 8 201019318 to connect the first processing unit and the node to transmit the first audio signal to the converting unit and the input/output unit, and when the switching unit does not receive the switching signal. The connection between the first processing unit and the node is disconnected such that the external audio signal received by the input and output unit is not transmitted to the first processing unit and the switch is 'effectively preventing the external audio signal from being attenuated. [Embodiment] As shown in FIG. 1 , an audio processing system 100 of a preferred embodiment includes a control unit 1〇1, a first processing unit 103, a storage unit 105, a switch list 70 1〇7, a conversion unit 109, The playback unit 111, the input and output unit 113, the second processing unit 115, and the node 120. The control unit generates the trigger signal and the switch signal 2 based on the user's operation and transmits to the first processing unit 1〇3 and the switch unit respectively; the control unit 7L 101 also stops generating the trigger signal and the switch memory storage unit 70 105 based on the user's operation. For storing an audio file, the audio file may be a (four) audio file, a WMA video file, or other folder including an audio file. The storage unit 105 may also be a hard disk. Processing early 1〇3 for receiving and returning The signal should be triggered to decode the memory component in the memory card (10), and to the switch unit 1〇7. In the present embodiment, the first processing unit 103 includes a decoding module and a digital-to-analog conversion module. The audio file is used to output the digital audio μ, and the digital-to-analog conversion module is used to convert the digital audio signal to the 201019318 output analog audio signal; the amplification module is used to amplify the analog audio signal and output the first audio signal. The switch unit 107 is configured to connect the switch signal to the first processing unit 1〇3 and the node 120 to output the first audio signal to the switch through the node ι2〇. The unit 109 and the input/output unit 113. The switch unit 1〇7 also disconnects the connection between the first processing unit 1〇3 and the node 12〇 when the switch signal is not received. The second processing unit 115 is configured to receive The first audio signal is processed, and the first audio signal is processed, for example, the noise in the first audio signal is filtered, and the processed first audio signal is outputted through the input/output unit 113. The first processing The element 115 can be a filter circuit. The input and output unit 113 is further configured to receive an externally input audio signal. The input and output unit 113 can be a 3.5 mm headphone jack. The first processing unit 115 is further configured to receive from the input and output unit. The audio signal of 113 is processed and the external audio signal is processed to reduce the noise in the audio signal and obtain the second audio signal. The second audio signal is transmitted to the conversion unit 1〇9 by the node 120. The converting unit 109 is configured to perform an amplification conversion on the first audio signal and the second audio signal from the first processing unit 1〇3 and the second processing unit (1), respectively, to obtain the driving The driving signal of the unit U1 is used as a signal amplifying device in the present embodiment. The playing unit m is a speaker 'for receiving the driving signal to play the audio carried by the driving signal. When the external audio is played, the control unit No. 201019318, the switch unit 103 and the node 109 are not separated to effectively prevent the receiving user from stopping to generate the trigger signal and the switch 107 can not receive the switch signal. And disconnecting the connection between the first processing unit 120 so that the second audio signal is transmitted to the conversion unit to the second processing unit 1〇3 and the switching unit 〇7 by the second processing unit. The second audio signal is attenuated to improve the sound quality. Simple description of the schema]
圖1為一較佳實施方式的音頻處理系統的功能模組圖。 【主要元件符號說明】 音頻處理系統 第一處理單元 開關單元 播放單元 第二處理單元 100 控制單元 103 存儲單元 107 轉換單元 111 輸入輪出單元 115 節點 101 105 109 113 120 111 is a functional block diagram of an audio processing system in accordance with a preferred embodiment. [Description of main component symbols] Audio processing system First processing unit Switching unit Playback unit Second processing unit 100 Control unit 103 Storage unit 107 Conversion unit 111 Input wheeling unit 115 Node 101 105 109 113 120 11