TW200835377A - Apparatus and method for removing surrounding noise - Google Patents
Apparatus and method for removing surrounding noise Download PDFInfo
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- TW200835377A TW200835377A TW096138044A TW96138044A TW200835377A TW 200835377 A TW200835377 A TW 200835377A TW 096138044 A TW096138044 A TW 096138044A TW 96138044 A TW96138044 A TW 96138044A TW 200835377 A TW200835377 A TW 200835377A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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Abstract
Description
200835377 九、發明說明： 【發明所屬之技術領域】 本發明大體係關於移除3 R μ > 矛夕除周圍雜訊之裝置及方法，且更特 定言之，係關於在藉由麥克風或感測器接收使用者之語音 信號並經由-有線/無線連接將該語音㈣發射至一對應 物的通信裝備中或在接收所I声 按收所要_音之裝備巾移除周圍雜訊 之裝置及方法’其可移除與使用者之語音信號或所要聲音 一起輸入的周圍雜訊。 【先前技術】 用於接收使用者之語音信號並經由一有線/無線連接將 該語音信號發射至對應物的通信裝備包括（例如）家用電 活移動一使用的仃動通信終端機、收音機及裝備有麥克 風之語音通信頭戴式耳機。 同丁用於接收特疋聲音之裝備包括（例如）用於監聽人200835377 IX. Description of the invention: [Technical field of the invention] The apparatus and method for removing 3 R μ > spears surrounding noise, and more specifically, by microphone or sense The device receives the voice signal of the user and transmits the voice (4) to a corresponding communication device via a wired/wireless connection or removes the surrounding noise device from the device towel receiving the sound of the desired sound The method 'which removes surrounding noise input with the user's voice signal or desired sound. [Prior Art] A communication device for receiving a voice signal of a user and transmitting the voice signal to a counterpart via a wired/wireless connection includes, for example, a mobile communication terminal, a radio, and an equipment used for home electric mobility Voice communication headset with a microphone. Equipment used to receive special sounds includes, for example, for listening to people
體中產生的心跳、啤踢、猫Ϊ班 Π日W 吁及循娘、知内雜訊及血管聲音並確 定相關器官之狀態的電子聽診器及用於偵測管中之水漏的 水漏4貞測器。 此種用於純❹者之語音錢料信裝備或此種用於 接收特定聲音的裝備使用麥克風或感測器來接收使用者之 语音信號或特定聲音。在此狀況下’關聲音與使用者之 語音信號或特定聲音一起輸入。 詳έ之，戶外存在各種類型的雜訊。舉例而言，各種類 型的聲音可包括由周圍的人所產生的雜訊、由公共運輸工 /、（諸如，出祖車或公共汽車）所產生的雜訊及在建築場地 125635.doc 200835377 所產生的雜訊。此外，與戶外一樣，彳内亦可產生雜訊。 舉例而言，分隔型場所（諸如，卡拉〇1^廳）及用於回答用戶 之電話詢問的呼叫中心因雜訊而苦惱。 當在存在雜訊的戶内或戶外場所使用通信裝備（諸如， 订動通#終端機）建立語音呼叫時，頻繁地發生被叫方歸 因於雜矾而不能準確瞭解由呼叫方之語音所傳送的内容之 狀況。 此種經由麥克風或感測器而接收使用者之語音信號或特 定聲音的通信裝備具有一問題：當周圍雜訊與使用者之語 音^號或特定聲音一起輸入時，可能會並不傳送使用者之 語音信號，或不能單獨輸入特定聲音。 因此，為了解決該問題，已提出多種方法及裝置。圖工 為移除經由麥克風而進入之周圍雜訊的習知電路圖。 如圖1中所示，移除周圍雜訊之習知電路經組態以使 得’當使用者之語音信號及周圍雜訊信號經由麥克風1〇而 輸入時，使用串聯連接之電容器C2來移除雜訊信號。藉由 放大器20來放大無雜訊信號，並藉由揚聲器將該無雜訊信 號輸出·至使用者。 . 同時’移除經由麥克風而輸入之雜訊的習知電路具有一 問題：非線性雜訊不會被移除，使得非線性雜訊與輸入之 音信號組合，且所得信號被放大，從而仍未完全移除雜 訊0 同時，日本未審查專利第Sho61-99451號（下文稱為”先前 發明1 係基於以下事實··如自先前發明1之公開案之第2 125635.doc 200835377Heartbeats, beer kicks, cats and scorpions, and the electronic stethoscopes used to identify the state of the relevant organs and the water leaks used to detect water leaks in the tubes. Detector. Such voice money equipment for pure use or such equipment for receiving a specific sound uses a microphone or sensor to receive a user's voice signal or a specific sound. In this case, the 'off sound' is input together with the user's voice signal or specific sound. In detail, there are various types of noise in the outdoors. For example, various types of sounds may include noise generated by surrounding people, noise generated by public transporters/, such as ancestral cars or buses, and at the construction site 125635.doc 200835377 The noise generated. In addition, as in the outdoors, noise can also be generated in the raft. For example, a separate location (such as a Karaoke Hall) and a call center for answering a user's telephone enquiry are troubled by noise. When a voice call is established using a communication device (such as a subscription terminal) in an indoor or outdoor location where noise is present, it frequently occurs that the called party is attributed to the hodgepod and cannot accurately understand the voice of the calling party. The status of the content being delivered. Such a communication device that receives a user's voice signal or a specific sound via a microphone or a sensor has a problem that the user may not transmit the user when the surrounding noise is input together with the user's voice number or a specific voice. The voice signal, or a specific sound cannot be entered separately. Therefore, in order to solve this problem, various methods and apparatuses have been proposed. Figure A conventional circuit diagram for removing ambient noise entering via a microphone. As shown in FIG. 1, the conventional circuit for removing surrounding noise is configured such that when the user's voice signal and surrounding noise signals are input via the microphone 1 , the capacitor C2 connected in series is used to remove Noise signal. The noise-free signal is amplified by the amplifier 20, and the noise-free signal is output to the user via the speaker. At the same time, the conventional circuit of removing the noise input via the microphone has a problem that the nonlinear noise is not removed, so that the nonlinear noise is combined with the input sound signal, and the resulting signal is amplified, thereby still The noise is not completely removed. Meanwhile, Japanese Unexamined Patent Publication No. Sho 61-99451 (hereinafter referred to as "previous invention 1 is based on the following facts] as disclosed in the disclosure of the prior invention 1 2 125635.doc 200835377
頁的描述所瞭解，藉由電話效能的改良，甚至一微小聲音 (亦即，非常低的雜訊）由電話放大且接著被發送至對應 物，使得具有低位準之周圍雜訊（其在習知電話中未被認 為疋雜λ )被對應物聽到，藉此影響呼叫品質。亦即，歸 因於使用具有改良之效能及相應改良之放大效能之電話， 微小雜訊（其在習知之不靈敏電話中未被認為是雜訊）並不 改、欠地發射至對應物，使得出現對應物可聽到微小雜訊之 現象’從而需要減小此微小雜訊。 ^此，先岫發明1揭示一種使用一放大器的技術，其中 將苓考位準設定為一低於呼叫方之最大語音之位準及高於 周圍雜訊之位準的位準，當輸入信號之位準低於參考位準 時增大放大增益，且當輸入信號之位準心參考位準時減 小放大增益。 / 、，然而，先前發明丨具有問題：根據先前發明丨之參考位準 亚=適用於可變情況，而是用於固定情況，且必須將參考 位準設定為處於一低於典型人之語音的最小量值之位準的 位準（亦即，十分低的位準），以防止歸因於語音量值之差 的錯誤。亦即，必須增大參考位準以移除具有稍高位準之 雜訊。然而，在此狀況下，出現一問題：建 說話的呼叫方之語音被移除。 ^耳 ^外^日本未審查專利第2GG5.86361號（下文稱為”先前 揭示一種根據周圍雜訊之位準自動設定來話呼叫 之音量的技術。然而，先前發明2試圖藉由簡單地增大雜 訊與來話’叫及去話輸人之語音的音量而非移除雜訊來克 125635.d〇< 200835377 服雜訊問題，且因此並未提供一 法。 秒沛雜讯之基本解決方 [發明内容】 因此’本發明緊記先前技術中出現的上述問題 明之目標為提供一種移除周圍雜訊之裝置及方法 猎由對經由麥克風或感測器而輸入之包括雜訊的有效二 仏 虎進行全波整流而獲得之—平均值來設定寺電泣曰 且以基於所設定之參考電流而控制的增益來放大輸入：立 =電流，藉此較大程度地放大有效聲音且較小程度二 大雜机，使得可自該聲音中移除周圍雜訊。 本=之另一目標為提供—種移除周圍雜訊之裝置及方 一預定參考位準來調整經由麥克風或感測器而 ==包括雜訊的聲音信號之位準，且自經調整及輸入之 的聲音信號中移除具有高於—預定限制輸入位準 =準的聲音信號’藉此保持最終輪出之聲音的位準均勻 而與聲音與麥克風之間的距離無關。 :、、、了貝見上述目心’本發明提供一種移除周圍雜訊之裝 X該裝置自經由麥克風或感测器而輸入之包括雜訊的有 夕/耳^吕號中移除雜訊’該裝置包括：-參考電流設定單 :’八用於基於藉由對聲音信號進行全波整流而獲得之一 =來設定一參考電流；一可變放大單元，其經組態以 ΐ传基於由參考電流設定單元而設定之參考電流來控制可 又放大早70之增益，並經組態以用該增益來放大輸入聲音 ㈣之一輸入電流；及-參考位準收斂單元與-輸入位準 125635.doc 200835377 限制單元中之至少-者，其中參考位準收敛單元用於將聲 2信號之輸入位準收斂至—預定參考位準，輸入位準限制 單7G用於自亥每音k號中移除具有高於一預定限制輸入位 準之位準的聲音信號。 此外，本發明提供—種移除周圍雜訊之方法，該方法自 • —經由麥克風或感測器而輪入之包括雜訊的有效聲音信號 中移除雜訊，該方法包括：基於藉由對該聲音信號進行全 _ 波整流而獲得之一平均值來設定-參考電流之步驟⑷；基 於由步驟⑷設定之參考電流來控制增益，並以該增益來放 大輸入聲音^號之輸入電流的步驟⑻；及將該聲音信號之 輸：位準收斂至一預定參考位準的步驟⑷與自該聲音信號 中移除具有高於一預定限制輸入位準之位準的聲音信號的 步驟（d)中之至少一者。 【實施方式】 下文將參看隨附圖式基於本發明之較佳實施例來詳細地 • 料移除周圍雜訊之裝置及方法。若禮定在本發明之描述 中相關熟知功能或結構之詳細描述使本發明之要旨變得含 糊不清，則下文將省略該等詳細描述。 • 首先，將參看隨附圖式描述根據本發明之實施例的移除 • 周圍雜訊之裝置的操作原理。 圖2為展示根據本發明之實施例的移除周圍雜訊之裝置 中的輪入聲音之輸入位準相對其輸出位準的圖表。 多看圖2，如圖式中所示，在根據本發明之實施例的移 除周圍聲音之裝置中，當將〇 dBm之輸入位準設定為參考 125635.doc 200835377 位準日守，在輸入位準為+10 dBm之狀況下相應輸出位準為 +20 dBm，而在輸入位準為·1〇 dBm之狀況下相應輸出位準 為-20 dBm。亦即，此意謂當輸入一高於預定參考位準之 輸入位準日守輸出一更咼輸出位準，而當輸入一低於預定參 考位準之輸入位準時輸出一更低輸出位準。 同時在一與麥克風間隔一預定距離的位置處，自經由 夕克風而輸入之語音之限制位準的觀點來看，有效聲音 (諸如，使用者之語音信號）之輸入位準高於周圍雜訊之位 準:、此可藉由實驗來證明。舉例而言，在靠近嘴的位置處 聲壓為約102 dB且在與嘴間隔8⑽之位置處聲壓為％ dB而在8 cm之範圍内之區域中雜訊大體低於上述聲壓。 因此，麥克風較佳位於距使用者之嘴5 _〜15⑽之範圍 内。因此，術語”距離”係指距麥克風5咖〜15_的距離。 更詳細言之，舉例而言，在一人在具有許多雜訊的場所 (堵如，卡拉OK廳）使用一行動通信終端機來呼叫一外部對 ==狀況下，周圍的人以及行動通信終端機之使用者感 去拉GK廳中所產生的雜訊高於行動通信終端機之使 用#的語音。 ，而，在-與行動通信終端機之麥克風間隔一預定距離 的位置處’自經由麥克風而輸 來看，卡拉OK廳中所產生的雜1曰之限制位4的觀點 踹艢“ 的雜矾之位準低於行動通信終 Μ機之使用者的語音之位進。Απ ' 一 此原因為使用者的語音係自 與行動通信終端機之麥克 麥身風0 克風間隔-預定距離的位置經由 夕見風而輸入，而卡拉g 峨廳中所產生的雜訊係自-比預 125635.doc 200835377 定距離遠的位置經由麥 之夫 I風而輸入。在與行動通信終端機 :=隔-預定距離的位置處雜訊已大大地衰 =與㈣通信終端機之麥克風間隔-預定距離的位置處 雜讯之位準低於行動通信終端機之使用者的位準。 ::隨附圖式描述根據本發明之一實施例的使用上述原 :徵之移除周圍雜訊之裝置。下文將參考-實例描述 =用於自-經由麥克風而進人之包括雜訊的實際聲音中 移除雜訊之裝置。 圖3為根據本發明之一警始点丨λλ #人 只知例的移除周圍雜訊之裝置100 的方塊圖。 如圖3中所示’根據本發明之移除周圍雜訊之裝置 ⑽（其自經由麥克風11G而輸人之包括雜訊的有效聲音中 移除雜訊）包括：—參考位準收斂W其用於將一經 由麥克風m而輸入之聲音信號之輸入位準收斂至一預定 參考位準；一輸入位準限制單元13〇，其用於自經由參考 位準收斂單元120而輸入之聲音信號中移除具有高於一預 定”限制輸入位準"之位準的聲音信號；一參考電流設定單 7L 140 ’其用於將一參考電流設定為藉由對經由輸入位準 限制單元130而輸入之聲音信號進行全波整流而獲得之平 均值；一可變放大單元150’其經組態以使得根據藉由參 考電流設定單元140而設定之參考電流來控制可變放大單 元150之增益，並經組態以用相應增益來放大經由輸入位 準限制單元130而輸入之聲音的輸入電流；及一輸出位準 調整單元170 ’其用於調整藉由可變放大單元15〇而放大之 125635.doc -11 200835377 聲音的輸出位準。 根據本實施例之移除周圍雜訊之裴置100可進一步包 括 可鉍電阻單元160’其用於確定一放大比，使得輸 出位準調整單元17〇可根據一預定放大比調整聲音之： . -輸出位準限制單元18〇’其用於自由輸出位準調整 早*兀170而輸入之聲音信號中移除具有高於一"限制輪出位 準"之位準的聲音信號；及一頻率限制單元190，其用於自 •=由輸出位準調整單元Π〇而輸入之聲音信號中衰減具有 冋於一預定頻率之頻率的分量。 在上述結構中，參考電流設定單元140基於經由麥克風 110而輸入之聲音來設定一參考電流。更詳細言之，當一 包括雜訊的有效聲音經由麥克風110而輸入時，以一對應 於輸入弇音之電信號的形式施加一預定電壓，且基於所施 加之電壓而產生一電流。已接收到所產生之電流的參考電 流設定單元140基於藉由對輸入電流進行全波整流而獲得 Φ 之平均值來設定參考電流。 k後’基於由參考電流設定單元丨4〇而設定之參考電流 來控制增盈，且可變放大單元150根據該增益而放大輸入 _ ~音之輸入電流。此處，可變放大單元1 50使用一典型運 ‘ 异放大姦’且以如下方式改變放大比：將藉由參考電流設 定單元140而設定之參考電流用作一 DC偏移值且回應於DC 偏移值的變化而改變增益。由於運算放大器之增益的變化 係基於熟知技術，所以此處省略其詳細描述。可變放大單 元150經由麥克風11〇(如同參考電流設定單元14〇)而接收包 125635.doc -12- 200835377 括雜訊的有效聲音之電流，且以根據所設定之 控制的增益來可變地放大輸入電流。 4哼電流而 同時，可變放大單元150之增益與經由 签立夕帝颅, 兄風而輸入之 14: 成例。此意謂一高於由參考電流設定單元 140而歧之參考電流的#效聲音被較大程度地早凡 低於參考電流之雜訊被較小程度地放大。 且 更詳細言之，如上文所描述，一有效聲音且古 麥克風隔-預定距離的位置處雜訊:輪入位：:: 二位：去當包括雜訊的有效聲音經由麥克風。： 二參考電流設定單元14。藉由輸出包括雜訊的有效聲： 之輸入電流的平均值來設定一參考電流， ^ 150用根據所設定之參考電流而控制的增益來以如下Π ^地放大包括雜訊的有效聲音：高於參考電流之有效聲 :被杈大程度地放大且低於參考電流之雜訊被較小程度地 放大。 —參考位準收鈒單元12()基於默參考位準而放大或衰減 經由麥克風110而輸入之包括雜訊的有效聲音信號。亦 即，當聲音與麥克風110之間的距離增大時，輸入至麥克 風110的有效聲音之輸人位準減小，使得雜訊與聲音之間 的電Μ位準差減小’從而即使可變放大單元150可變地放 ^雜Λ及聲音’雜訊移除之效率仍相應減小。相反，當聲 音與麥克風110之間的距離減小時，輸入至麥克風11〇的有 效聲音之輸入位準相應增大，使得經由麥克風110而輸入 U音信號可藉由可變放大單元150而放大至一比通信所 125635.doc -13- 200835377 必需之音量高得多的音量。 因此，t自麥克風"。輸入之包括雜訊的有效聲 =低：預定參考位準時參考位準收敛單元— 4而放大聲音之輸入位準，且當有效聲音之輸入位準 同於預定參考位準時美於夂去 _ …早手基於參考位準而衰減聲音之輸入位 、終，視聲音與麥克風110之間的距離而確定由泉 位準收斂單元120而設定之參考 " ^ ς 哼位旱’且此外，該距離較 I土苟 3 cm 〇As the description of the page understands, even a small sound (ie, very low noise) is amplified by the phone and then sent to the counterpart by the improvement of the phone's performance, so that the surrounding noise with a low level (which is in the habit) It is known that the noisy λ in the telephone is heard by the counterpart, thereby affecting the call quality. That is, due to the use of a phone with improved performance and corresponding improved amplification performance, micro-noises (which are not considered to be noise in conventional insensitive phones) do not change, owe to the counterpart, This makes it possible for the corresponding object to hear small noises' and thus needs to reduce this small noise. ^ This, first invention 1 discloses a technique using an amplifier in which the reference level is set to a level lower than the maximum voice level of the calling party and a level higher than the level of the surrounding noise, when the input signal The level is lower than the reference level to increase the amplification gain, and the amplification gain is reduced when the bit of the input signal is referenced by the reference level. / , however, the prior invention has a problem: the reference level according to the prior invention is applicable to the variable case, but is used for the fixed case, and the reference level must be set to be at a lower than typical human voice. The level of the minimum magnitude (ie, a very low level) to prevent errors due to the difference in the amount of speech. That is, the reference level must be increased to remove noise with a slightly higher level. However, in this case, there is a problem that the voice of the talking caller is removed. ^ 耳^外^ Japanese Unexamined Patent No. 2GG5.86361 (hereinafter referred to as "previously disclosed" a technique for automatically setting the volume of an incoming call based on the level of surrounding noise. However, the prior invention 2 attempts to simply increase Big noise and incoming words 'call and go to lose the voice of the voice instead of removing the noise to 125635.d〇< 200835377 service noise problem, and therefore did not provide a method. Basic Solution [Invention] Therefore, the present invention is directed to the above problems occurring in the prior art, and the object of the present invention is to provide a device and method for removing surrounding noise, which includes input of noise including input via a microphone or a sensor. The effective 仏 仏 tiger performs the full-wave rectification to obtain the average value to set the temple power and the gain based on the set reference current to amplify the input: vertical = current, thereby amplifying the effective sound to a large extent The second degree of noise is such that the surrounding noise can be removed from the sound. Another goal of this = is to provide a device for removing surrounding noise and a predetermined reference level to adjust via microphone or sense. Detector == includes the level of the sound signal of the noise, and removes the sound signal having a higher than - predetermined limit input level = accurate from the adjusted and input sound signal - thereby maintaining the final turn The level of the sound is uniform regardless of the distance between the sound and the microphone. : , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , The noise is removed from the eve/ears of the noise. The device includes: - a reference current setting list: 'eight is used to obtain one based on one of the full-wave rectification of the sound signal. a reference amplification current; a variable amplification unit configured to control the gain based on the reference current set by the reference current setting unit to control the gain of the early 70 and configured to amplify the input sound with the gain (4) One of the input currents; and - the reference level convergence unit and the - input level 125635.doc 200835377 at least one of the limiting units, wherein the reference level convergence unit is used to converge the input level of the acoustic 2 signal to - a predetermined reference Level, The in-position limit order 7G is used to remove the sound signal having a level higher than a predetermined limit input level from the K-phone number. Further, the present invention provides a method for removing surrounding noise, the method Removing noise from an effective sound signal including noise transmitted through a microphone or a sensor, the method comprising: setting an average value based on full-wave rectification of the sound signal a step of reference current (4); a step of controlling the gain based on the reference current set by the step (4), and amplifying the input current of the input sound by the gain (8); and converging the output of the sound signal to a predetermined The step (4) of the reference level and at least one of the step (d) of removing the sound signal having a level higher than a predetermined limit input level from the sound signal. [Embodiment] Hereinafter, an apparatus and method for removing surrounding noise in detail based on a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The detailed description of the well-known functions or structures in the description of the present invention is not to be construed as a • First, the principle of operation of a device for removing surrounding noise according to an embodiment of the present invention will be described with reference to the accompanying drawings. 2 is a graph showing the input level of the wheeled sound in the device for removing ambient noise relative to its output level, in accordance with an embodiment of the present invention. Referring to Figure 2, as shown in the figure, in the apparatus for removing ambient sound according to an embodiment of the present invention, when the input level of 〇dBm is set to the reference 125635.doc 200835377, the position is on the input. The corresponding output level is +20 dBm with a level of +10 dBm, and the corresponding output level is -20 dBm with an input level of 1〇dBm. That is, this means that when an input level higher than a predetermined reference level is input, a higher output level is output, and when an input level lower than a predetermined reference level is input, a lower output level is output. . At the same time, at a position spaced apart from the microphone by a predetermined distance, the input level of the effective sound (such as the user's voice signal) is higher than the surrounding noise from the viewpoint of the limit level of the voice input through the hurricane wind. The level of the news: This can be proved by experiments. For example, the sound pressure at a position near the mouth is about 102 dB and the sound pressure is % dB at a position spaced from the mouth 8 (10) and the noise is generally lower than the above sound pressure in a region within 8 cm. Therefore, the microphone is preferably located within the range of 5 to 15 (10) from the user's mouth. Therefore, the term "distance" refers to the distance from the microphone 5 to 15_. More specifically, for example, a person uses a mobile communication terminal to call an external pair in a place with many noises (blocking, karaoke hall), the surrounding person, and the mobile communication terminal. The user feels that the noise generated in the GK hall is higher than that of the mobile communication terminal. And, at a position separated from the microphone of the mobile communication terminal by a predetermined distance, 'from the point of view of the limitation of the 4 经由 , , , , , 卡拉 卡拉 卡拉 卡拉 卡拉 卡拉 卡拉 卡拉 卡拉The level of the voice is lower than the voice of the user of the mobile communication terminal. Απ ' The reason for the user's voice is from the mobile communication terminal's MacMed's body wind 0 gram wind interval - the predetermined distance position It is input through the eve of the wind, and the noise generated in the Karag Hall is input from the position far away from the pre-125635.doc 200835377 via the Maifu I wind. In the mobile communication terminal: = - The noise at the position of the predetermined distance has greatly deteriorated = the position of the noise at the position of the microphone interval of the (four) communication terminal - the predetermined distance is lower than the level of the user of the mobile communication terminal. A device for removing ambient noise using the above-described original method according to an embodiment of the present invention. Reference will be made to the following example - description for the actual sound removal from the microphone including the noise The device of noise. Figure 3 is the root One of the present inventions is a block diagram of a device 100 for removing surrounding noise. As shown in FIG. 3, the device (10) for removing surrounding noise according to the present invention (which is self-contained via a microphone) 11G and the loss of noise in the effective sound of the input noise including: the reference level convergence is used to converge the input level of the sound signal input via the microphone m to a predetermined reference level; An input level limiting unit 13〇 for removing a sound signal having a level higher than a predetermined “limit input level” from a sound signal input through the reference level convergence unit 120; a reference current Setting a single 7L 140' for setting a reference current to an average value obtained by full-wave rectifying a sound signal input via the input level limiting unit 130; a variable amplifying unit 150' configured The gain of the variable amplification unit 150 is controlled in accordance with a reference current set by the reference current setting unit 140, and is configured to amplify the input via the input level restriction unit 130 with a corresponding gain. The input current of the sound; and an output level adjusting unit 170' for adjusting the output level of the sound of the 125635.doc -11 200835377 by the variable amplifying unit 15A. The device 100 for removing surrounding noise according to the present embodiment may further include a resistor unit 160' for determining an amplification ratio such that the output level adjustment unit 17 may adjust the sound according to a predetermined amplification ratio: - an output level limiting unit 18 〇 'which is used for the free output level adjustment early * 兀 170 and the input sound signal is removed from the sound signal having a level higher than a "limit rounding level"; and A frequency limiting unit 190 is configured to attenuate a component having a frequency of a predetermined frequency from the sound signal input by the output level adjusting unit Π〇. In the above configuration, the reference current setting unit 140 sets a reference current based on the sound input via the microphone 110. More specifically, when an effective sound including noise is input via the microphone 110, a predetermined voltage is applied in the form of an electrical signal corresponding to the input voice, and a current is generated based on the applied voltage. The reference current setting unit 140 that has received the generated current sets the reference current based on an average value of Φ obtained by full-wave rectifying the input current. After k, the gain is controlled based on the reference current set by the reference current setting unit 丨4〇, and the variable amplifying unit 150 amplifies the input current of the input _ _ according to the gain. Here, the variable amplifying unit 150 uses a typical analogy and changes the amplification ratio in such a manner that the reference current set by the reference current setting unit 140 is used as a DC offset value and is responsive to DC. The gain is changed by the change in the offset value. Since the variation of the gain of the operational amplifier is based on well-known techniques, a detailed description thereof is omitted here. The variable amplifying unit 150 receives the current of the effective sound of the packet 125635.doc -12-200835377 via the microphone 11A (as with the reference current setting unit 14A), and variably with the gain according to the set control. Amplify the input current. At the same time, the gain of the variable amplifying unit 150 and the input of the 14th through the signing of the Xi'an skull and the brother's wind are examples. This means that the #effect sound which is higher than the reference current which is different from the reference current setting unit 140 is amplified to a lesser extent by the noise which is considerably lower than the reference current. More specifically, as described above, an effective sound and an ancient microphone is separated by a predetermined distance from the noise: wheel in place::: two bits: to pass the effective sound including the noise via the microphone. : Two reference current setting unit 14. The reference current is set by outputting an average value of the input current including the effective sound of the noise: ^ 150 is used to amplify the effective sound including the noise by using the gain controlled according to the set reference current: The effective sound at the reference current: the noise that is amplified to a large extent and lower than the reference current is amplified to a lesser extent. The reference level receiving unit 12() amplifies or attenuates the effective sound signal including the noise input via the microphone 110 based on the default reference level. That is, when the distance between the sound and the microphone 110 is increased, the input level of the effective sound input to the microphone 110 is reduced, so that the electric potential difference between the noise and the sound is reduced, thereby even The variable amplifying unit 150 variably shifts the noise and the noise. The efficiency of the noise removal is correspondingly reduced. Conversely, when the distance between the sound and the microphone 110 is decreased, the input level of the effective sound input to the microphone 11A is correspondingly increased, so that the input U-tone signal via the microphone 110 can be amplified by the variable amplification unit 150 to A much higher volume than the required volume of the communication station 125635.doc -13- 200835377. Therefore, t from the microphone ". The input includes the effective sound of the noise = low: the predetermined reference level is based on the reference level convergence unit - 4 and the input level of the sound is amplified, and when the input level of the effective sound is the same as the predetermined reference level ... The early hand determines the input position of the sound based on the reference level, and ends the distance between the sound and the microphone 110 to determine the reference set by the spring level convergence unit 120 " ^ ς 哼位 drought' and further, the distance 3 cm more than I bandit
。輸入位準限制單元13Ό自經由麥克風ιι〇而輸入之聲音信 :中移除具有π於預定"限制輸人位準"之位準的聲音信 遽。亦即’當聲音與麥克風11G之間的距離增大時，輸入 ^麥克風11G的有效聲音之輸人位準減小，使得雜訊與聲 θ之間的電壓位準差減小’從而雜訊之位準變得高於聲音 之位準。結果’可變放大單元150可放大雜訊多於放大： 音’如上文所描述。 因此，輸入位準限制單元130自聲音信號（其位準已藉由 乡考位準收斂單元12〇而調整）中移除具有高於預定限制輸 位準之位準的聲音信號（亦即，雜訊），且將所得信號輸 出至可變放大單元150及參考電流設定單元M0。此處，上 述限制輸入位準為一對應於足以用於通信之音量的值。聲 壓較佳為92 dB。同時，儘管輸入位準限制單元13〇可移除 部分有效聲音，但是歸因於以下事實而需要上述處理··高 於足以用於通信之聲音的聲音並未放大。 可I:電阻單元13 0為一用於確定將在稍後描述之輸出位 125635.doc -14- 200835377 準凋正單元170之放大比的可變‘電阻器。 輸出位準調整單元170調整藉由可變放大單元150所放大 。:：a之位準。可使用一運算放大器來實施輸出位準調整 :兀170 ’且輸出位準調整單元17〇藉由以一預定放大比來 大藉由可變放大單元15〇而放大之聲音之位準來調 正耳曰之位準。此處，藉由一可變電阻單元來確定預 定放大比。 ' 輸出位準限制單元18〇使一自移除周圍雜訊之裝置⑽而 輸出之聲音自然而非尖銳，且自由輸出位準調整單元17〇 最、、放大之聲音中移除具有不必要高於—預定限制輸出 位準（亦即’―對應於^以用於通信之聲音之位準的位準） 之位準的聲音。 ； 麥克風之典型頻率回應特徵具有自50 Hz至20 kHz之範 圍内的頻寬’同時語音頻率之範圍為3()() Ηζ〜3·4他 :限制單元刚自經由輸出位準限制單元i8〇而輸入之聲音 ^虎中衰減具有高於預定頻率（亦即’ 3 4叫之頻率的分 置’且輸出一所得信號。因此，在一行動通信終端機系統 。、應用-裝備有頻率限制單元19〇的移除周圍雜訊之裝置 ⑽）中’調變並發射/接收-具有—窄於基於麥克風之頻率 回應特徵之頻寬的頻寬之語音頻率，藉此達成以下優點： 降低基地台功率消耗；改良通信品質；及有效使用頻率。 /克風m較佳使用一駐極體電容式麥克風（ec⑷來實 :。考慮到周圍雜訊之衰減比，麥克風之靈敏度效能較二 等於或低於在約1 kHz下的-40 dB。 125635.doc •15· 200835377 圖4為根據本發明之另一實施例的移除周圍雜訊之裝置 400的方塊圖。 如圖4中所示，根據本發明之移除周圍雜訊之裝置 4〇〇(其自經由麥克風410而輸入之包括雜訊的有效聲音中 移除雜訊）包括：一參考電流設定單元440，其用於將一參 考電流設定為藉由對經由麥克風4〗〇而輸入之聲音信號進 行t波整流而獲得之平均值；一可變放大單元450，其經 組態以使得根據由參考電流設定單元440而設定之參考電 流來控制可變放大單元450之增益，並經組態以用相應增 赶來放大經由麥克風410而輸入之聲音之輸入電流；一束 考位準收斂單元42〇,其用於將經由可變放大單元45〇而輸 入之聲音信號之輸人位準收斂至—預定參考位準；一輸入 位準限制單元43〇’其用於自經由參考位準收斂單元彻而 輸入之聲音信號中移除具有高於—預定"限制輸人位準"之 位準的聲音信號；及一輸出位準調整單元47〇,直用於， 整藉由輸入位準限制單元43〇而放大之聲音之輸出位準。 根據本實施例之移除周圍雜訊之裝置彻可進一牛勺括 一:變電阻單元彻、-輸出位準限制單元彻及—頻=限 制單元490。 同時，由於移除周圍雜訊之裝置彻的元件在功能 作方面與結合圖3所描述之移除周圍雜訊之裝置刚的各別 凡件相同，唯—例外的是裝置_之參考特徵不同於裝置 _之參考特徵，所以此處省略詳細描述。然而， 準收斂單元420及輸入位準限制單元之位置不同於❸ 125635.doc -16 - 200835377 2之彼等位置。因此’當藉由可變放大單元450而可變地 大，包括雜訊的有效聲音之輸人位準低於預定參考位準 1位：考位：收斂單元420基於參考位準來放大聲音之輸 '且當糟由可變放大單元45〇而可變地放大之包括 雜訊的有效簦立々认χ / 、壮 又匕括. The input level restriction unit 13 removes the sound signal having a level of π from the predetermined "limit input level" from the voice message input via the microphone ιι〇. That is, when the distance between the sound and the microphone 11G increases, the input level of the effective sound input to the microphone 11G decreases, so that the voltage level difference between the noise and the sound θ decreases. The level becomes higher than the level of the sound. As a result, the variable amplifying unit 150 can amplify the noise more than the amplification: the sound 'as described above. Therefore, the input level limiting unit 130 removes the sound signal having a level higher than the predetermined limit level from the sound signal whose level has been adjusted by the home level quenching unit 12 (ie, The noise is outputted, and the obtained signal is output to the variable amplification unit 150 and the reference current setting unit M0. Here, the above-mentioned limit input level is a value corresponding to a volume sufficient for communication. The sound pressure is preferably 92 dB. Meanwhile, although the input level restricting unit 13 can remove part of the effective sound, the above processing is required due to the fact that the sound higher than the sound sufficient for communication is not enlarged. I: The resistance unit 130 is a variable 'resistor for determining the amplification ratio of the output unit 125635.doc -14-200835377 which will be described later. The output level adjustment unit 170 adjusts the magnification by the variable amplification unit 150. ::a is the standard. An operational amplifier can be used to implement the output level adjustment: 兀 170 ' and the output level adjustment unit 17 调 is adjusted by the level of the sound amplified by the variable amplification unit 15 以 at a predetermined amplification ratio The level of deafness is accurate. Here, the predetermined amplification ratio is determined by a variable resistance unit. The output level limiting unit 18 causes the sound output from the device (10) for removing the surrounding noise to be natural rather than sharp, and the free output level adjusting unit 17 removes the most, and the amplified sound is unnecessarily high. A predetermined sound that limits the level of output (i.e., 'the level corresponding to the level of the sound used for communication'). The typical frequency response characteristic of the microphone has a bandwidth from 50 Hz to 20 kHz. The range of the speech frequency is 3 () () Ηζ ~ 3 · 4 he: the limiting unit has just passed the output level limiting unit i8输入The input sound ^The attenuation in the tiger has a higher than the predetermined frequency (that is, the division of the frequency of '3 4' and outputs a resulting signal. Therefore, in a mobile communication terminal system. The unit 19's device for removing surrounding noise (10) is 'modulated and transmitted/received' with a speech frequency narrower than the bandwidth of the frequency-based response characteristics of the microphone, thereby achieving the following advantages: Power consumption; improved communication quality; and effective use frequency. / 克 wind m is better to use an electret condenser microphone (ec (4) to achieve: Considering the attenuation ratio of the surrounding noise, the sensitivity of the microphone is equal to or lower than -40 dB at about 1 kHz. .doc • 15· 200835377 Figure 4 is a block diagram of an apparatus 400 for removing ambient noise in accordance with another embodiment of the present invention. As shown in Figure 4, a device for removing ambient noise is provided in accordance with the present invention. 〇 (which removes noise from the effective sound including noise input via the microphone 410) includes: a reference current setting unit 440 for setting a reference current to be input by the microphone 4 The sound signal is averaged by t-wave rectification; a variable amplification unit 450 configured to control the gain of the variable amplification unit 450 according to the reference current set by the reference current setting unit 440, and Configuring to amplify the input current of the sound input via the microphone 410 with a corresponding boost; a beam calibration level convergence unit 42A for inputting the sound signal input via the variable amplification unit 45〇 Quasi-convergence a predetermined reference level; an input level limiting unit 43 〇 'which is used to remove a higher than - predetermined "limit input level" from the sound signal input through the reference level convergence unit The quasi-sound signal; and an output level adjusting unit 47〇 are used for the output level of the sound amplified by the input level limiting unit 43. The device for removing the surrounding noise according to the embodiment It is possible to include a variable resistance unit, an output level limiting unit, and a frequency = limiting unit 490. At the same time, due to the removal of the surrounding noise, the components of the device are functionally combined with FIG. The description of the device for removing surrounding noise is just the same, except that the reference feature of the device_ is different from the reference feature of the device_, so the detailed description is omitted here. However, the quasi-convergence unit 420 and the input The position of the level limiting unit is different from the position of ❸ 125635.doc -16 - 200835377 2. Therefore, 'when it is variably large by the variable amplifying unit 450, the effective sound of the noise including the noise is low. At a predetermined reference position Quasi-1 bit: test position: the convergence unit 420 amplifies the input of the sound based on the reference level and variably enlarges the noise including the noise by the variable amplification unit 45〇, and then Including
9之輸人位準大於狀參考位準時，參考位 早兀420基於參考位準來衰減聲音之輸入位準。藉 :如此做，經由移除周圍雜訊之裝置400而最終輸出之聲 音之位準保持均勻而與聲音與麥克風4Η)之間的距離盈 關。輸入位準限制單元彻自聲音信號（其位準已藉由參考 位準收斂單元42〇而調整）中移除具有高於預定限制輸入位 準之位準的聲音信號（亦即，雜訊）。 圖5為根據本發明之又一實施例的移除周圍雜訊之裝置 500的方塊圖。 如圖5中所示，根據本發明之移除周圍雜訊之裝置 500(其自經由麥克風51〇而輸入之包括雜訊的有效聲音中 移除雜訊）包括··一擴展參考電流設定單元54〇,其使用藉 :對經由麥克風5 i 〇而輸入之聲音信號進行全波整流而獲 得之平均值來設定一用於擴展聲音信號之位準的”擴展參 考電流”；一位準擴展單元55〇，其經組態以使得根據由擴 展多考電流没定單元540而設定之擴展參考電流來控制位 準擴展單元550之增益，並經組態以用相應增益來擴展經 由麥克風510而輸入之聲音信號之輸入電流；一第一位準 调整單元570a，其用於調整經由位準擴展單元55〇而輸入 之聲音之位準；一位準壓縮單元52〇，其經組態以使得根 125635.doc -17· 200835377 據一預定”壓縮參考電流”來控制位準壓縮單元52〇之增 孤，並經組怨以用相應增益來擴展經由第一位準調整單元 570a而輸入之聲音信號之輸入電流；一壓縮參考電流設定 單元530，其使用藉由對自位準壓縮單元而輸出之聲音 仏號進行王波整流而獲得之平均值來設定一用於壓縮聲音 信號之位準的”壓縮參考電流”；及一第二位準調整單元 570b，其用於調整經由位準壓縮單元52〇而輸入之聲音之 位準。When the input level of 9 is greater than the reference level, the reference bit 兀 420 is used to attenuate the input level of the sound based on the reference level. By doing so, the level of the final output sound is kept uniform and the distance between the sound and the microphone 4) via the device 400 for removing the surrounding noise. The input level limiting unit removes the sound signal (ie, noise) having a level higher than the predetermined limit input level from the sound signal whose level has been adjusted by the reference level convergence unit 42. . Figure 5 is a block diagram of an apparatus 500 for removing ambient noise in accordance with yet another embodiment of the present invention. As shown in FIG. 5, the apparatus 500 for removing surrounding noise according to the present invention (which removes noise from the effective sound including noise input via the microphone 51A) includes an extended reference current setting unit. 54〇, the use of: the average value obtained by full-wave rectification of the sound signal input through the microphone 5 i 来 to set an "extended reference current" for expanding the level of the sound signal; a quasi-expansion unit 55〇, configured to control the gain of the level expansion unit 550 according to the extended reference current set by the extended multi-test current deficient unit 540, and configured to extend the input via the microphone 510 with a corresponding gain Input current of the sound signal; a first level adjustment unit 570a for adjusting the level of the sound input via the level expansion unit 55A; a quasi-compression unit 52〇 configured to cause the root 125635.doc -17· 200835377 controls the leveling of the level compression unit 52 according to a predetermined "compression reference current", and is extended by the corresponding gain to expand via the first level adjusting unit 570a. Input current of the sound signal; a compression reference current setting unit 530, which sets a level for compressing the sound signal by using an average value obtained by performing a king wave rectification on the sound signal output from the level compression unit a "compressed reference current"; and a second level adjustment unit 570b for adjusting the level of the sound input via the level compression unit 52A.
根據本實施例之移除周圍雜訊之裝置500可進一步包括 一第一可變電阻單元56〇a、一第二可變電阻單元兄叽、一 輸出位準限制單元5 8 0及一頻率限制單元5 9 〇。 同日守，由於位準擴展單元55〇在功能及操作方面與可變 放大單M50相同，且擴展參考電流設定單以4()在魏及 細作方面與參考電流設定單元14()相$，所以此處省略詳 細描述^。 此外’由於第-可變電阻單元56Ga及第二可變電阻單元 观在=能及操作方面與可變電阻單元16〇相同，輸出位 準限制早S580在功能及操作方面與輸出位準限制單元⑽ ，冋’且頻率限制單元59()在功能及操作方面與頻率限制 早兀190相同，所以此處省略詳細描述。 同時’位準壓縮單元520及壓縮參考電流設定單元$ 用於將最終經由移除周圍雜訊之裝置500而輸出之聲音保 持：一均句位準而無關於聲音與麥克風“Ο之間的距離的 70 ，且在功能及操作方面與參考位準收斂單元420相 125635.doc -18- 200835377 同。亦即’當有效聲音低於壓縮參考電流時 520放大經由第一位m 、、早 士上吨 位丰5周整早凡570a而輸入之包括雜訊的 效耳曰且田有效聲音高於壓縮參考電流時位準壓縮單 元52〇衰減有效聲音。 圖6為位準擴展單元及擴展參考電流設定單元之電路 圖’其中位準擴展單元及擴展參考電流設定單元為根據本 發明之實施例的圖5之元件。如圖6中所示，較佳使用一用 於對輸入信號執行全波整流之整流器、-用於在整流哭之 控制下調節輸入信號之增益的增益調節器及-運算：：哭 來建構位準擴展單元550及擴展參考電流設定單元:4〇。°。 同時’圖7為位準壓縮單元及㈣參考電流設定單元之 電路圖，其中位準壓縮單元及壓縮參考電流設定單元為根 據本發明之實施例的圖5之元件。如圖7中所示，較佳使用 整流器、㉟益調節器及運算放大器來建構位準壓縮單元 520及壓縮參考電流設定單元53〇。此處，圖7之整流器及 增益調節器構成一對於運算放大器的反饋迴路。 可使用-開關來控制具有上述結構的移除周圍雜訊之裝 置，使得其可藉由使用者之操縱而選擇性地接通或斷開: 此外，移除周圍雜訊之裝置可應用於所有通信裝備(諸 如’典型電話、電子聽診器、收音機及行動通信故端 機)，且可以晶片之形式提供。詳言之，下文將描述將移 除周圍雜訊之裝置應用於行動通信終端機的狀況。 下文將參看隨附圖式描述具有上述結構的移除周圍雜訊 之裝置的操作。詳言之，將移除周圍雜訊之裝置接通的狀 125635.doc -19- 200835377 況描述為一實例。 :為根據本發明之實施例的移除周圍雜訊之方法的流 :圖中1方法實施於結合圖3而描述之移除周圍雜訊之裝 有:&在乂驟川處，麥克風110接收—包括周圍雜訊之 夫=音。在步驟SI3處’參考位準收敛單元m基於預定 2 、㈣麥克風⑽而輸人之聲音信號之輸入位準 ::至-預定值。在步驟S15處，輸入位準限制單元13〇自 ::位準收激單元120而輸入之聲音信號中移除具有高 於預疋限制輸入位準之位準的聲音信號。 隨後，施加一對應於自輸入位準限制單元13〇而輸入之 有：聲音(包括周圍雜訊)之預定電壓，由所施加之電壓產 生一電流’且將該電流輸入至參考電流設定單元14〇及可 變放大單元15〇。 因此，在步驟S17處，參考電流設定單元14〇對輸入電流 執仃全波整流，且在步驟S19處，使用藉由全波整流而獲 得之平均值來設定一參考電流。 同時，在步驟S21處，可變放大單元15〇用基於由參考電 流設定單元14 0所設定之參考電流而控制的增益來可變地 放大輸入電流。藉由在步驟S21處之可變放大，較大程度 地放大有效聲音，同時較小程度地放大周圍雜訊，藉此移 除周圍雜訊。 隨後，在步驟S23處，輪出位準調整單元17〇藉由以預定 放大比最終放大由可變放大單元15〇而放大之電流來調整 125635.doc -20- 200835377 聲音之輸出位準。 隨後，在步驟S25處，輸出位準限制單元⑽ ::整單元17°而最終放大之聲音中移除具有高於預： 制輸出位準(亦即，對應於足以用於通信之音量的位準)之 位準的不必要聲音。 • =，在步驟S27處’頻率限制單元19。自經由輸出位準 <制早兀18〇而輸人之聲音信號中衰減具有高於預定頻率 φ 、即3·4 ΜΖ)之頻率的分量，並輸出-所得信號。 圖9為根據本發明之另—實施例的移除周圍雜訊之方法The device 500 for removing surrounding noise according to this embodiment may further include a first variable resistance unit 56A, a second variable resistance unit, an output level limiting unit 580, and a frequency limit. Unit 5 9 〇. On the same day, since the level expansion unit 55 is identical in function and operation to the variable amplification single M50, and the extended reference current setting is 4 () in terms of Wei and fine works with the reference current setting unit 14 (), The detailed description ^ is omitted here. In addition, since the first variable resistor unit 56Ga and the second variable resistor unit are identical in operation and operation to the variable resistor unit 16A, the output level limit is early S580 in terms of function and operation and the output level limiting unit. (10), 冋' and the frequency limiting unit 59() is identical in function and operation to the frequency limitation earlier than 190, so a detailed description is omitted here. At the same time, the 'level compression unit 520 and the compressed reference current setting unit $ are used to maintain the sound outputted by the device 500 for removing the surrounding noise: a uniform sentence level regardless of the distance between the sound and the microphone "Ο" 70, and in terms of function and operation, is the same as the reference level convergence unit 420 125635.doc -18- 200835377. That is, when the effective sound is lower than the compressed reference current, the 520 is amplified by the first position m, The tonnage is 5 weeks early and the 570a is input and the noise is included in the noise. The field effective sound is higher than the compression reference current. The level compression unit 52 attenuates the effective sound. Figure 6 shows the level expansion unit and the extended reference current setting. The circuit diagram of the unit 'where the level extension unit and the extended reference current setting unit are elements of Fig. 5 according to an embodiment of the invention. As shown in Fig. 6, a rectifier for performing full-wave rectification of the input signal is preferably used. - a gain adjuster for adjusting the gain of the input signal under the control of the rectification crying and - operation: crying to construct the level expansion unit 550 and the extended reference current setting unit: 4 〇. 7 is a circuit diagram of a level compression unit and (4) a reference current setting unit, wherein the level compression unit and the compression reference current setting unit are elements of FIG. 5 according to an embodiment of the present invention. As shown in FIG. Preferably, a rectifier, a 35-regulator, and an operational amplifier are used to construct the level compression unit 520 and the compression reference current setting unit 53. Here, the rectifier and the gain regulator of FIG. 7 constitute a feedback loop for the operational amplifier. a switch for controlling the device for removing surrounding noise having the above structure so that it can be selectively turned on or off by user manipulation: In addition, the device for removing surrounding noise can be applied to all communication devices. (such as 'typical phone, electronic stethoscope, radio and mobile communication terminal'), and can be provided in the form of a chip. In detail, the situation in which the device for removing surrounding noise is applied to the mobile communication terminal will be described below. The operation of the apparatus for removing surrounding noise having the above structure will be described with reference to the accompanying drawings. In detail, the device for removing surrounding noise will be connected. An example is a flow of a method for removing ambient noise in accordance with an embodiment of the present invention: the method of Figure 1 is implemented as described in connection with Figure 3 The noise is installed: & at the stop, the microphone 110 receives - including the surrounding noise = sound. At step SI3, the reference level convergence unit m inputs the sound based on the predetermined 2, (4) microphone (10). The input level of the signal is: to the predetermined value. At step S15, the input level limiting unit 13 is: from the level-acquiring unit 120 and the input sound signal is removed from the input signal level having a higher than the preset limit. a level sound signal. Subsequently, a predetermined voltage corresponding to the sound (including surrounding noise) is input corresponding to the input level level limiting unit 13, and a current is generated from the applied voltage and the current is applied. It is input to the reference current setting unit 14A and the variable amplifying unit 15A. Therefore, at step S17, the reference current setting unit 14 仃 performs full-wave rectification on the input current, and at step S19, a reference current is set using the average value obtained by full-wave rectification. Meanwhile, at step S21, the variable amplifying unit 15 variably amplifies the input current with the gain controlled based on the reference current set by the reference current setting unit 140. By the variable amplification at step S21, the effective sound is amplified to a large extent while the surrounding noise is amplified to a small extent, thereby removing the surrounding noise. Subsequently, at step S23, the wheel-out level adjusting unit 17 adjusts the output level of the sound of 125635.doc -20-200835377 by finally amplifying the current amplified by the variable amplifying unit 15A at a predetermined amplification ratio. Subsequently, at step S25, the level level limiting unit (10) is selected: the entire unit is 17° and the final amplified sound is removed with a higher level than the pre-made output level (i.e., corresponding to a volume sufficient for communication). Unnecessary sound of the standard. • =, at step S27, the frequency limiting unit 19. The component having a frequency higher than the predetermined frequency φ, that is, 3·4 ΜΖ) is attenuated from the sound signal of the input through the output level < output, and the resulting signal is output. 9 is a diagram of a method of removing surrounding noise according to another embodiment of the present invention.
的流程圖，該方法杂《 #认4丄A 只⑪於、、、口曰圖4而描述之移除周圍 的裝置400中。 首先在步驟S3 1處，麥克風41〇接收一包括周圍雜訊之 有效聲音。在步驟如處，參考電流設定單元440對經由麥 克風410而輸入之聲音信號執行全波整流，且在步驟S35 處’參考電流設定單元44〇基於藉由全波整流而獲得之 春均值來設定一參考電流。 隨後’在步驟S37處’可變放大單元㈣用根據由參考電 流设定單元440所設定之參考電流而控制的增益來可變地 ’ 放大輸入電流。 . 隨後’在步驟S39處，參考位準收斂單元42〇基於預定夫 考位準將藉由可變放大單元45〇而放大之聲音信號之輸二 位準调整至-預定值。在步驟s4i處，輸入位準限制單元 430自經由參考位準收斂單元42㈣輸入之聲音信號中移除 具有高於預定限制輸入位準之位準的聲音信號。 125635.doc 21 200835377 隨後，在步驟S43處，於φ a、隹a 土 L . 慝輪出位準調整單元470藉由以預定 放大比來最終放大藉由可變 — 、 二 支放大早兀450而放大之電流炎 调整聲音之輸出位準。 k後，在步驟S 4 5處，給Φ 、、| 準Μ —47λ 輸出位準限制單元彻自由輪出位 丰凋整早7G 470而最終放大之聲 曰Τ私除具有南於預定附 制輸出位準（亦即，万以田认、s y 疋限 咬立 p足以用於通信的位準)之位準的不必要 耷晋。The flow chart of the method is described in the following description of the removal of the device 400 described in FIG. First, at step S31, the microphone 41 receives an effective sound including surrounding noise. At the step, the reference current setting unit 440 performs full-wave rectification on the sound signal input via the microphone 410, and the reference current setting unit 44 设定 sets the spring average value obtained by full-wave rectification at step S35. Reference current. Then, at step S37, the variable amplifying unit (4) variably amplifies the input current with a gain controlled in accordance with the reference current set by the reference current setting unit 440. Then, at step S39, the reference level convergence unit 42 adjusts the input binary level of the sound signal amplified by the variable amplification unit 45A to a predetermined value based on the predetermined scoring level. At step s4i, the input level limiting unit 430 removes the sound signal having a level higher than the predetermined limit input level from the sound signal input via the reference level convergence unit 42 (4). 125635.doc 21 200835377 Subsequently, at step S43, the φ a, 隹a soil L. 慝 wheel out level adjustment unit 470 is finally enlarged by a predetermined magnification ratio by variable -, two-time magnification early 兀 450 The amplified current illuminates the output level of the sound. After k, at step S45, give Φ, , | Μ Μ λ λ λ λ λ λ λ λ λ λ λ λ λ λ λ λ 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 The level of output (that is, the level of omnipotent recognition, sy 咬 咬 p p 足以 足以 足以 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。
隨後，在步驟S47處，頻率限制留一 ιΠΛ & 頊半限制早兀490自經由輸出位準 限制單元480而輸入之聲音传 耳曰1口現中哀減具有高於預定頻 (亦即’ 3·4 kHz)之頻率的公旦、，认， 須半的刀里，亚輸出一所得的信號。 圖1 0為根據本發明之又一每ρ 乂、& 、 a炙又貝鈿例的移除周圍雜訊之方法 的流程圖’該方法實施於纟士人 貝％、、口 σ圖5而描述之移除周圍雜訊 之裝置500中。 百先，在步驟S51處’麥克風510接收—包括周圍雜訊之 有效聲音。隨後，在步驟S53處，擴展參考電流設定單元 ⑽對經由麥克風51〇而輸入之聲音信號執行全波整流，且 在步驟S55處，擴展參考電流設定單元54〇將擴展參考單元 δ又疋為藉由全波整流而獲得之平均值。 隨後，在步驟S57處，位準擴展單元55〇用基於由擴展夫 考電流設定單元540所設定之擴展參考電流而控制的增益 來可變地放大輸入電流（擴展輸入電流之位準）。 隨後，在步驟S59處，第一位準調整單元57〇&調整經由 位準擴展單元55〇而輸入之聲音之位準。Subsequently, at step S47, the frequency limit is left ΠΛ amp 顼 限制 限制 兀 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 490 The signal of the frequency of 3·4 kHz) is the same as the signal of the commonalt, the recognition, and the half of the knife. Figure 10 is a flow chart of another method for removing surrounding noise according to another embodiment of the present invention. The method is implemented in a gentleman's shell, and the mouth σ is shown in Fig. 5. It is described in the device 500 for removing surrounding noise. The first, at step S51, the microphone 510 receives - including the effective sound of the surrounding noise. Subsequently, at step S53, the extended reference current setting unit (10) performs full-wave rectification on the sound signal input via the microphone 51A, and at step S55, the extended reference current setting unit 54 turns the extended reference unit δ into a lump The average value obtained by full-wave rectification. Subsequently, at step S57, the level expansion unit 55 variably amplifies the input current (the level of the extended input current) with the gain controlled based on the extended reference current set by the expansion current setting unit 540. Subsequently, at step S59, the first level adjusting unit 57 〇 & adjusts the level of the sound input via the level expanding unit 55 。.
Ik後，在步驟S61處，壓縮參考電流設定單元53〇對經由 125635.doc •22- 200835377 第-位準調整單元570a而輸入之聲音信號執行全波整流， =在步驟S63處，壓縮參考電流設定單元5观—壓縮參考 電流設定為藉由全波整流而獲得之平均值。 隨後’在步驟S65處，位準壓縮單元52〇用基於藉由壓縮 - I考電流設定單元530所設定之壓縮參考電流而控制的增 • 盈來可變地放大輸入電流（壓縮輸入電流之位準）。 隨後，在步驟S67處，第二位準調整單元刃补調整經由 ⑩ 位準壓縮單元52〇而輸入之聲音之位準。 酼後，在步驟S69處，輸出位準限制單元58〇自藉由第二 位準调整單570b而最終放大之聲音中移除具有高於預定 限制輸出位準（亦即，對應於足以用於通信之音量的位準） 之位準的不必要聲音。 隨後，在步驟S71處，頻率限制單元59〇自經由輸出位準 限制早兀580而輸入之聲音信號中衰減具有高於預定頻率 (亦即，3.4 kHz)之頻率的分量，並輸出一所得信號。 • 參看隨附圖式描述根據本發明之一實施例的移除周圍雜 訊之裝置的電路。下文描述自經由麥克風而輸入之包括雜 訊的有效聲音中移除雜訊的狀況。 - 圖11為根據本發明之實施例的移除周圍雜訊之裝置的電 • 路圖。 如圖11中所示，根據本實施例之移除周圍雜訊之裝置 200包括·一預處理電路單元22〇，其具有一連接至麥克風 21〇之語音輸入端的輸入端子；一全波整流電路單元24〇， 其具有一連接至預處理電路單元220之語音輸入端的輸入 125635.doc -23- 200835377 =及-連接至可變放大單元之增益控制端子的整流電流 :出端子=可變放大電路單元25G，其具有—連接至預 处理電路單7Q220之語音輸入端的輸入端子、一連接至全 波整流電路單元24〇之輸出端子的增益控制端子及一經由 -電阻_至位準調整單元之輸入端子的放大電流輸出 知子，及-位準轉換電路單元27〇,其用於經由電阻器而 自可變放大單元之輸出端子接收電流，以預定增益放大信 號且經由其輸出端子輸出一所得信號。 預處理電路單元220包括一輸入位準調整電路單元⑵盘 二輸入位準限制電路單元223中的至少一者，其中輸入位 準調整電路單元221用於將自麥克風㈣輸人的語音輸入之 輸入位準收斂至預定參考位準，輸人位準限制電路單元 223用於自由輸入位準調整電路單元而輸入之語音中移除 具有高於預定限制輸入位準之位準的聲音信號。 根據本實施例的移除周圍雜訊之裝置200可進一步包 括：一可變電阻器電路單元’其用於碎定當位準轉換 電路單it270以默增益放大—信號時使用的增益；及一 後處理電路早凡230,其具有一連接至位準轉換電路單元 2 7〇之輸出端子的輸入端子。 後處理電路單元230包括-輸出位準限制電路單元23ί盥 一頻率限制電路單元233中的至少一者，其中輸出位準限 制電路單元231用於自由位準轉換電路單元27㈣輸入之電 流t移除具有高於狀限制輸出位準之位準的聲音信號， 頻率限制電路單元233用於自由輸出位準限制電路單元加 125635.doc -24- 200835377 而輸入之電流中移除具有高於預定頻率（亦即，3·4 kHz)之 頻率的分量。 在上述結構中，全波整流電路單元240基於自電子電容 式麥克風（ECM)而輸入之聲音來設定參考電流，如圖式中 所示。更詳細言之，當包括雜訊的有效聲音經由麥克風而 輸入時，施加一預定電壓（其為對應於輸入聲音之電信 號），且由所施加之電壓產生電流。全波整流電路單元 240(已接收到所產生之電流）基於藉由對輸入電流進行全波 整流而獲得之平均值來設定參考電流。 可變放大電路單元250具有基於由全波整流電路單元240 而設定之參考電流來控制的增益，且以相應增益來放大輸 入聲音之輸入電流。可變放大電路單元250經由麥克風（如 同全波整流電路單元240)而接收包括雜訊的有效聲音之電 流，且以基於設定之參考電流而控制的增益來可變地放大 輸入電流。 隨後，輸入位準調整電路單元220基於預定參考位準來 放大並衰減自麥克風210而輸入之電流的量值。更詳細言 之，當輸入電流之位準低於預定參考位準時輸入位準調整 電路單元220將自麥克風210而輸入之電流的位準較大程度 地放大至參考位準，且當輸入電流之位準高於預定參考位 準時輸入位準調整電路單元220將輸入電流之位準較小程 度地放大至參考位準。同時，圖12為展示圖11之輸入位準 調整電路單元的詳細電路圖。可使用電阻器、二極體、電 晶體及電容器之組合來建構輸入位準調整電路單元220， 125635.doc -25- 200835377 如圖12中所示。 隨後，輸入位準限制電路單元23〇自由輸入位準調整電 路單元220之輸出端子而輸入之電流中移除具有高於預定 限制輸入位準之位準的聲音信號，且將一所得信號輸出至 可變放大電路單元250及全波整流電路單元24〇。 隨後，位準轉換電路單元27〇藉由以預定放大比來最終 放大由可變放大電路單元250而放大之聲音之位準來調整 聲音之位準。After Ik, at step S61, the compressed reference current setting unit 53 performs full-wave rectification on the sound signal input via the 125635.doc • 22-200835377 first-level adjustment unit 570a, = at step S63, the reference current is compressed The setting unit 5 - the compression reference current is set to an average value obtained by full-wave rectification. Then, at step S65, the level compression unit 52 variably amplifies the input current (the position of the compressed input current) by increasing the gain based on the compressed reference current set by the compression-reference current setting unit 530. quasi). Subsequently, at step S67, the second level adjustment unit blade compensates for the level of the sound input via the 10-bit quasi-compression unit 52A. Thereafter, at step S69, the output level limiting unit 58 removes the sound that is finally amplified by the second level adjustment sheet 570b and has a level higher than the predetermined limit output level (ie, corresponding to sufficient for Unnecessary sound of the level of the volume of the communication. Subsequently, at step S71, the frequency limiting unit 59 attenuates a component having a frequency higher than a predetermined frequency (i.e., 3.4 kHz) from the sound signal input via the output level limit early 580, and outputs a resultant signal. . • Referring to the accompanying drawings, a circuit for removing a surrounding noise device in accordance with an embodiment of the present invention will be described. The following describes the situation in which noise is removed from the effective sound including the noise input via the microphone. - Figure 11 is an electrical diagram of a device for removing ambient noise in accordance with an embodiment of the present invention. As shown in FIG. 11, the apparatus 200 for removing surrounding noise according to the present embodiment includes a pre-processing circuit unit 22 having an input terminal connected to a voice input terminal of the microphone 21A; a full-wave rectifier circuit The unit 24A has an input 125635.doc -23-200835377 = and - a rectified current connected to the gain control terminal of the variable amplifying unit: the output terminal = variable amplifying circuit The unit 25G has an input terminal connected to the voice input end of the preprocessing circuit unit 7Q220, a gain control terminal connected to the output terminal of the full wave rectifier circuit unit 24, and an input via the resistor-to-level adjustment unit. The amplified current output terminal of the terminal, and the level shifting circuit unit 27 is configured to receive a current from the output terminal of the variable amplifying unit via a resistor, amplify the signal with a predetermined gain, and output a resultant signal via its output terminal. The pre-processing circuit unit 220 includes at least one of an input level adjustment circuit unit (2), a disk two-input level limiting circuit unit 223, wherein the input level adjustment circuit unit 221 is configured to input the voice input input from the microphone (4) The level converges to a predetermined reference level, and the input level limit circuit unit 223 is configured to freely input the level adjustment circuit unit and remove the sound signal having a level higher than the predetermined limit input level from the input voice. The apparatus 200 for removing surrounding noise according to the present embodiment may further include: a variable resistor circuit unit for compensating for a gain used when the level conversion circuit unit itself 270 amplifies the signal by a gain; and The processing circuit is 230, which has an input terminal connected to the output terminal of the level conversion circuit unit 27. The post-processing circuit unit 230 includes at least one of an output level limit circuit unit 23, wherein the output level limit circuit unit 231 is used for the free level conversion circuit unit 27 (4) input current t removal a sound signal having a level higher than the limit output level, the frequency limiting circuit unit 233 is used for the free output level limiting circuit unit plus 125635.doc -24-200835377 and the input current is removed with a higher than predetermined frequency ( That is, the component of the frequency of 3·4 kHz). In the above structure, the full-wave rectifying circuit unit 240 sets the reference current based on the sound input from the electronic condenser microphone (ECM) as shown in the figure. More specifically, when an effective sound including noise is input via a microphone, a predetermined voltage (which is an electric signal corresponding to the input sound) is applied, and a current is generated by the applied voltage. The full-wave rectifying circuit unit 240 (which has received the generated current) sets the reference current based on an average value obtained by full-wave rectifying the input current. The variable amplifying circuit unit 250 has a gain controlled based on a reference current set by the full-wave rectifying circuit unit 240, and amplifies the input current of the input sound with a corresponding gain. The variable amplifying circuit unit 250 receives a current of an effective sound including noise via a microphone (e.g., the full-wave rectifying circuit unit 240), and variably amplifies the input current with a gain controlled based on the set reference current. Subsequently, the input level adjustment circuit unit 220 amplifies and attenuates the magnitude of the current input from the microphone 210 based on the predetermined reference level. In more detail, when the level of the input current is lower than the predetermined reference level, the input level adjustment circuit unit 220 amplifies the level of the current input from the microphone 210 to a reference level to a large extent, and when the input current is When the level is higher than the predetermined reference level, the input level adjustment circuit unit 220 amplifies the level of the input current to a small extent to the reference level. Meanwhile, Fig. 12 is a detailed circuit diagram showing the input level adjusting circuit unit of Fig. 11. The input level adjustment circuit unit 220 can be constructed using a combination of resistors, diodes, transistors, and capacitors, 125635.doc -25-200835377 as shown in FIG. Subsequently, the input level limit circuit unit 23 〇 freely inputs the output terminal of the level adjustment circuit unit 220 and removes the sound signal having a level higher than the predetermined limit input level, and outputs a resultant signal to The variable amplifying circuit unit 250 and the full-wave rectifying circuit unit 24 are. Subsequently, the level conversion circuit unit 27 adjusts the level of the sound by finally amplifying the level of the sound amplified by the variable amplification circuit unit 250 at a predetermined amplification ratio.
隨後，使用一預定低通濾波器（LPF)來實施頻率限制電 路單元290。較佳使用LPF來實施頻率限制電路單元29〇， 如圖13中所示。同時，圖14為展示當將丨v Ac電壓施加至 頻率限制電路單元29〇之輸入端子時頻率特徵的圖表。自 圖14可見’在！ kHz下輸出電壓為Q.9 v且輸出所施加之電 壓的大部分，而在3.5 kHz下輸出電壓衰減至〇 5 v。 出位準限制電路單元 者的輸出端子可電連 子。輸出端子可基於 同時，位準轉換電路單元270、輸 23 1及頻率限制電路單元233中之任一 接至行動通信終端機之麥克風輸入端 預定連接標準㈣-免持連接端子而連接至—行動通信 終端機。-實施可經組態以使得，t移除㈣雜訊之穿置 經由連接端子而連接至-行㈣信"機時，行動通 信終端機之自身的麥克風自動斷開。 同時’基於結合圖4而描述之移除周圍雜訊之事置彻 預處理電路單元22〇可安置於可變放大電路單元2顺可變 電阻器電路單元260之間。此外，在移除周圍雜訊之壯 125635.doc -26 - 200835377Subsequently, the frequency limiting circuit unit 290 is implemented using a predetermined low pass filter (LPF). The frequency limit circuit unit 29 is preferably implemented using LPF, as shown in FIG. Meanwhile, Fig. 14 is a graph showing the frequency characteristics when the 丨v Ac voltage is applied to the input terminal of the frequency limiting circuit unit 29A. As seen in Figure 14, 'in! The output voltage at kHz is Q.9 v and outputs most of the applied voltage, while at 3.5 kHz the output voltage is attenuated to 〇 5 v. The output terminal of the out-of-position limiting circuit unit can be electrically connected. The output terminal can be connected to the action based on the predetermined connection standard (4) - the hands-free connection terminal of the microphone input terminal of the mobile communication terminal, which is connected to any one of the level conversion circuit unit 270, the input 23 1 and the frequency limitation circuit unit 233. Communication terminal. - The implementation can be configured such that t removes (four) the wear of the noise. When connected to the -four (four) letter via the connection terminal, the microphone of the mobile communication terminal itself is automatically disconnected. At the same time, the pre-processing circuit unit 22 can be disposed between the variable amplifying circuit unit 2 and the variable-resistance circuit unit 260 based on the removal of the surrounding noise described in connection with FIG. Also, after removing the noise from the surrounding 125635.doc -26 - 200835377
中’基於結合圖5而描述之移除周圍雜訊之裝置500, 在缺夕預處理電路單元22〇的情況下，對應於位準壓縮單 几52〇及Μ縮參考電流設定單元53g之電路可安置於位準轉 換電路單切績後處理t路單元2取間。此外，根據本 κ [丨的私除周圍雜訊之裝置彻包括—用於選擇性地接 通和斷開移除周圍雜訊之裝置咖的開關及—用於供電以 知作電路之调即器。由於電阻器及電容器（上文未詳細描 述）用於％路之操作及穩定，所以此處省略詳細描述。 :圖15為-裝備有根據本發明之又—實施例的移除周圍雜 訊之裝置的行動通信終端機之方塊圖。 簽看圖15，裝備有根據本發明之又一實施例的移除周圍 雜訊之裝置310的行動通信終端機3〇〇包括一用於接收來自 外：之聲音的麥克風39〇;及用於自經由麥克風39〇而輸入 之聲音信號中移除周圍雜訊的裝置31〇。裝備有移除周圍 雜之衣置310的行動通信終端機3〇〇進一步包括一無線通 =單元330、-控制單元34〇、_鍵輸入單元35〇、—顯示 單7G 360、§己憶體37〇及—介面單元38〇，其為現有行動通 信終端機所共用。 在上述結構中，移除周圍雜訊之裝置310包括：一參考 位準收斂單元311，其用於將經由麥克風携而輸入之聲音 信號的位準收斂至一預定參考位準，或一輸入位準限制： 70312 ’其用於自經由麥克風39G而輸人之聲音信號中移除 具有高於預定限制輸入位準之位準的聲音信號；一參考電 机叹疋單兀313，其使用參考位準收斂單元311或輸入位準 125635.doc -27- 200835377 限制單元3 1 2基於藉由全飧餐、☆ 夂者+ 4 . 波整"丨L而獲得之平均值來設定一 參考電流，一可變放大單 ^ ^ t ^ . ，其經組態以使得基於由 ^ ^ 又疋之翏考電流來控制可變放大 你、隹 ⑽ 工、、且恶以用相應增益來放大經由參考 位準收斂皁元311而輸入之聲立 、、隹上&⑽— 耳曰的輸入電流；及一輸出位 準调正單兀3 10，其用於調整由 铃 聲音的輸出位準。 ^放大早兀⑴而放大之In the case of the device for removing surrounding noise described in connection with FIG. 5, in the case of the eve circuit unit 22, the circuit corresponding to the level compression unit 52 and the collapse reference current setting unit 53g It can be placed in the level conversion circuit to process the t-channel unit 2 after the single cut. In addition, according to the κ [丨 私 私 周围 周围 彻 彻 彻 彻 彻 彻 彻 彻 彻 彻 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性 选择性Device. Since the resistors and capacitors (not described in detail above) are used for the operation and stabilization of the % path, the detailed description is omitted here. Figure 15 is a block diagram of a mobile communication terminal equipped with means for removing ambient noise in accordance with yet another embodiment of the present invention. Referring to Figure 15, a mobile communication terminal 3 equipped with a device 310 for removing surrounding noise according to still another embodiment of the present invention includes a microphone 39 for receiving sound from the outside: and for A device 31 that removes surrounding noise from a sound signal input through the microphone 39. The mobile communication terminal device 3 equipped with the removal of the surrounding clothing set 310 further includes a wireless communication unit 330, a control unit 34, a _ key input unit 35A, a display unit 7G 360, and a suffix body. 37〇 and - interface unit 38〇, which is shared by existing mobile communication terminals. In the above structure, the apparatus for removing surrounding noise 310 includes: a reference level convergence unit 311 for converging the level of the sound signal input via the microphone to a predetermined reference level, or an input bit. Quasi-Limited: 70312' is used to remove a sound signal having a level above a predetermined limit input level from a sound signal input through the microphone 39G; a reference motor sigh 313, which uses a reference bit Quasi-convergence unit 311 or input level 125635.doc -27- 200835377 Restriction unit 3 1 2 sets a reference current based on the average value obtained by full meal, ☆ + + 4 . a variable amplification unit ^ ^ t ^ . , which is configured such that the variable amplification is controlled based on the reference current from ^^ and 你(10), and the evil is amplified by the corresponding gain. Quasi-convergence of soap element 311 and input of the sound, 隹上 & (10) - input current of the deafness; and an output level adjustment unit 10 3 10, which is used to adjust the output level of the ringing sound. ^Magnify early (1) and zoom in
_移除周圍雜訊之裝置310可進一步包括：一可變電阻單 z、用於確疋备輸出位準調整單元316調整聲音之位 準時使用的預定放大屮·—认 b，一輸出位準限制單元3 i 7，其用 於f由輸出位準調整單元316而輸人之聲音信號中移除具 有兩於預定限制輸出位準之位準的聲音信號；及一頻率限 制單元318，其用於自經由輸出位準限制單元317而輸入之 聲音信號中衰減具有高於敎頻率之頻率的分量。 在上述結構中，參考電流設定單元313基於經由麥克風 390而輸入之聲音來設定參考電流。更詳細言 <，當經由 麥克風390而輸入一包括雜訊的有效聲音時，施加一預定 電壓(其為對應於輸入聲音的電信號)，且由所施加之電壓 產生^流。參考電流設定翠元313(已接收到所產生之電流） 基於猎由對輸入電流進行全波整流而獲得之平均值來設定 參考電流。 基於藉由參考電流設定單元313而設定之參考電流來控 制增益，且可變放大單元314以該增益來放大輸入聲音: 輸入電流。可變放大單元314經由麥克風39〇(如同參考電 125635.doc -28- 200835377 流設定單元313)而接收包括雜訊的有效聲音之電流，且以 基於所設定之參考電流而控制的增益來可變地放大輸入電 流。 ，隨後’參考位準收斂單元311基於狀參考位準來放大 f衰減由麥克風390而輸入之包括雜訊的有效聲音信號的 里值更#、,田。之’ *有效聲音之輸人位準低於預定參考 位準時參考位準收斂單元311將自麥克風39〇而輸入之包括 雜訊的有效聲音之輸入位準較大程度地放大至該參考位 準，且當有效聲音之輸入位準高於預定參考位準時參考位 準收斂單元3 11將有效聲音於 乃又耳日之輸入位準較小程度地放大至 該參考位準。 广輸人位準限制單元312自經由麥克風携而輸入之 二曰U中移除具有高於預定限制輸入位準之位準的聲音 。：砰細言之’輸入位準限制單元312自聲音信號(其 位準已藉由參考位準你 _ 可位旱收斂早兀311而調整）中移除具有高於 預定限制輸入位準 之位丰的聲音信號（亦即，雜訊），且將 所知4吕號輸出至可變一 』殳放大早兀314及參考電流設定單元 3 13 ° 後’輸出位準*届敕 ― ”正早兀3 16調整藉由可變放大單元314 而放大之聲音的朽 狀私丄 的位率。輸出位準調整單元316可使用一運 异放大器來實施，日玆丄 變放大單元314r預定放大比來最終放大藉由可 L,, 敌大之聲音的位準來調整聲音的位準。 此處’藉由可鬱雷 π 一 ^ 單元3 12來確定預定放大比。 隨後，語音虛一 慝理早凡32〇具有一包括額外電路（諸如，音 125635.doc -29- 200835377 訊放大電路或濾波器）的熟知結構，將數位語音資料轉換 成一類比語音信號或執行反向轉換，且接收並信號處理由 頻率限制單元3 1 8而調整的聲音。語音處理單元32〇可為— 语音編解碼器。 • 無線通信單元330經組態以包括一天線及一 RF電路以用 於與基地台通信。在本說明書中，無線通信單元33〇經建 構以不僅包括現有通信方法（諸如，蜂巢式通信方法、 GSM、W_CDMA及WiBro以及不同版本之CDMA)而且進一 步包括行動通信方法。 控制單元340控制行動通信終端機之全部操作。鍵輸入 單元350包括複數個數字鍵、字符鍵及功能鍵，接收使用 者之命令，並將命令傳送至控制單元34〇。顯示單元36〇顯 示行動通信終端機之全部操作狀態。 。己憶體370可為非揮發性記憶體（諸如，EEpR〇M或快閃 Z 體）’且儲存對行動通信終端機進行操作所需的資料 g 及程式。 介面早兀380可為一用於將行動通信終端機連接至外部 設備的通信埠，且因此介面單元38〇經由一通信電纜連接 -至一外部設備。 ."儘管移除和雜訊之裝置31()可包括於如上文所描述之 仃t通仏終端機MO中，但是移除周圍雜訊之裝置HO可與 :麥整合在—起，該耳麥與行動通信終端機3G0-起提 仏在此狀况下，可藉由使用者之操縱而選擇性地接通或 斷開其操作。 125635.doc -30 - 200835377 此外’移除周圍雜訊之I置31()可以預定晶片之形式提 供，且因此可經組態以在其經由一通信電鐵基於輸入及輸 出端子之連接標準而連接至介面單元38〇並接收音訊信號 的狀況下操作。在此狀況下，一實施可經組態以使得，當 移除周圍雜訊之裝置經由行動通信終端機之介面單元380 而連接時，行動通信終端機之麥克風自動斷開。此可以如 下方式實施：當移除周圍雜訊之裝置接通時，行動通信終 端機接收並處理一相應信號。 、此外，連接標準包括TTA24piN。即使將來修訂連接標 準，亦可提供可根據修訂之連接標準連接至行動通信終端 機的移除周圍雜訊之裝置。作為參考，將在TTA24piN2 輸入及輸出端子的各別針腳之中的第7號針腳用作音訊 IN/PCMRX之針腳。 立同時，大體而言，聲碼器與藉由根據語音速度而改變語 音2料之發射速率來賦能有效使用頻率的技術有關。舉例 田了曰較快時將語音信號之發射速率切換至8 · $ KbpS ’且當語音較慢時切換至4.0 Kbps。同時，當幾乎聽 不到人浯音時’將發射速率切換至2.0 Kbps或切換至〇.8 Kbps。因此用於處理自上述頻率限制單元輸出之語音 ^ 旒的聲碼器（例如，13 Kbps Qualc〇mm CELP (QCELp)型 ㈢強可變速率語音編解碼器（EVRC))可安裝於根據本發明 之移除周圍雜訊的裝置中，且可結合行動通信終端機而一 起操作。 如上文所述，根據本發明之移除周圍雜訊之裝置及方法 125635.doc -31- 200835377 基於預f考位準將經由麥克風或感測器而輪入之包括雜 訊的信號之位準調整至_預定 匕括雜 對經調整之聲音信號進行全波敕* : ^考電為藉由 仃王波整流而獲得之平均值，並以 基於所没疋之參考電流而控制的増益來放大輸 入電流’藉此較大程度地放大有效聲音並較小程度地放: 雜訊，使得即使在麥克風與聲 大 成移除周圍雜訊之效果。間存在某—距離亦可達The device for removing the surrounding noise 310 may further include: a variable resistor single z, a predetermined amplification used to ensure that the output level adjustment unit 316 adjusts the level of the sound, and an output level The limiting unit 3 i 7 is configured to remove, from the sound signal input by the output level adjusting unit 316, a sound signal having two levels at a predetermined limit output level; and a frequency limiting unit 318 for using A component having a frequency higher than the chirp frequency is attenuated in the sound signal input from the output level limiting unit 317. In the above configuration, the reference current setting unit 313 sets the reference current based on the sound input via the microphone 390. More specifically, when an effective sound including noise is input via the microphone 390, a predetermined voltage (which is an electrical signal corresponding to the input sound) is applied, and a voltage is generated by the applied voltage. The reference current is set to Triton 313 (the generated current has been received). The reference current is set based on the average value obtained by full-wave rectification of the input current. The gain is controlled based on the reference current set by the reference current setting unit 313, and the variable amplification unit 314 amplifies the input sound with the gain: the input current. The variable amplifying unit 314 receives the current of the effective sound including the noise via the microphone 39 (like the reference electric 125635.doc -28-200835377 flow setting unit 313), and can obtain the gain controlled based on the set reference current. Variable grounding input current. Then, the reference level convergence unit 311 amplifies f based on the reference reference level to attenuate the value of the effective sound signal including the noise input by the microphone 390. When the input level of the effective sound is lower than the predetermined reference level, the reference level convergence unit 311 enlarges the input level of the effective sound including the noise input from the microphone 39〇 to the reference level to a large extent. And when the input level of the effective sound is higher than the predetermined reference level, the reference level convergence unit 3 11 enlarges the effective sound to the reference level to a lesser extent. The wide-range human limit limiting unit 312 removes sound having a level higher than a predetermined limit input level from the input U through the microphone. The input level limiting unit 312 removes the bit having a higher than the predetermined limit input level from the sound signal whose position has been adjusted by the reference level. Feng sound signal (that is, noise), and the known 4 Lu number is output to variable one 殳 殳 magnifying early 314 and reference current setting unit 3 13 ° after 'output level * 敕 ― ― early兀3 16 adjusts the bit rate of the scent of the sound amplified by the variable amplifying unit 314. The output level adjusting unit 316 can be implemented using a different amplifier, and the sigma amplifying unit 314r predicts the amplification ratio. The final amplification adjusts the level of the sound by the level of the sound of the enemy, and the sound of the enemy. Here, the predetermined amplification ratio is determined by the unit 3 12 of the turret. 32〇 has a well-known structure including an additional circuit (such as tone 125635.doc -29-200835377 amplifier circuit or filter), converting digital speech data into an analog voice signal or performing reverse conversion, and receiving and signal processing By frequency limiting unit 3 1 8 Adjusted sound. Voice processing unit 32 may be a voice codec. • Wireless communication unit 330 is configured to include an antenna and an RF circuit for communicating with a base station. In this specification, wireless communication unit 33 It is constructed to include not only existing communication methods (such as cellular communication methods, GSM, W_CDMA, and WiBro, and different versions of CDMA) but also mobile communication methods. Control unit 340 controls all operations of the mobile communication terminal. Key input unit The 350 includes a plurality of numeric keys, character keys, and function keys, receives a command from the user, and transmits the command to the control unit 34. The display unit 36 displays the entire operational state of the mobile communication terminal. Non-volatile memory (such as EEpR〇M or flash Z body)' and stores the data and programs required to operate the mobile communication terminal. Interface 380 can be used to connect mobile communication terminals. Communication to the external device, and thus the interface unit 38 is connected via a communication cable - to an external device. . And the noise device 31() may be included in the 仏t wanted terminal MO as described above, but the device HO for removing the surrounding noise may be integrated with: the headset and the mobile communication terminal In this case, the 3G0-lifting device can be selectively turned on or off by the user's manipulation. 125635.doc -30 - 200835377 In addition, 'I remove 31 () to remove the surrounding noise It may be provided in the form of a predetermined wafer, and thus may be configured to operate in a condition that it is connected to the interface unit 38A based on the connection standard of the input and output terminals via a communication electric iron and receives an audio signal. In this case, an implementation can be configured such that when the device that removes the surrounding noise is connected via the interface unit 380 of the mobile communication terminal, the microphone of the mobile communication terminal is automatically disconnected. This can be implemented as follows: When the device that removes the surrounding noise is turned on, the mobile communication terminal receives and processes a corresponding signal. In addition, the connection standard includes TTA24piN. Even if the connection standard is revised in the future, a device for removing surrounding noise that can be connected to the mobile communication terminal according to the revised connection standard can be provided. For reference, the 7th pin of each pin of the TTA24piN2 input and output terminals is used as the pin of the audio IN/PCMRX. At the same time, in general, the vocoder is related to the technique of enabling efficient use of frequencies by changing the transmission rate of the speech material according to the speech speed. For example, when the field is fast, the transmission rate of the voice signal is switched to 8 · $ KbpS ' and when the voice is slow, it is switched to 4.0 Kbps. At the same time, when almost no human voice is heard, the transmission rate is switched to 2.0 Kbps or switched to 〇.8 Kbps. Therefore, a vocoder for processing a voice output from the frequency limiting unit (for example, a 13 Kbps Qualc〇mm CELP (QCELp) type (3) strong variable rate speech codec (EVRC)) can be installed in accordance with the present invention. The device for removing surrounding noise can be operated together with the mobile communication terminal. As described above, the apparatus and method for removing surrounding noise according to the present invention 125635.doc -31- 200835377 is based on the level adjustment of the signal including the noise that is rotated by the microphone or the sensor based on the pre-f test position. To _ predetermined 匕 对 对 对 经 经 经 经 经 经 经 经 经 经 经 经 : : 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经 经'This greatly enlarges the effective sound and puts it to a lesser extent: noise, making it possible to remove the surrounding noise even in the microphone and sound. There is a certain distance - the distance can also reach
儘管為說明之目的已揭示本發明之較佳實施例 等熟習此項技術者將瞭解，在不偏離如隨附中請專㈣= 改、添加及替代 4精神的情況下，可進行各種修 【圖式簡單說明】 圖1為移除經由麥克風而進入之周圍雜訊的習知電路 圖； 电峪 圖2為展示根據本發明之實施例的移除周圍雜訊之裝置 中的輸入聲音之輸入位準相對其輸出位準的圖表； 圖3為根據本發明之實施例的移除周圍雜訊之裝 塊圖； "万 圖4為根據本發明之另一實施例的移除周圍雜訊之裝 的方塊圖； ^ 圖5為根據本發明之又一實施例的移除周圍雜訊之裝置 的方塊圖； 圖6為位準擴展單元及擴展參考電流設定單元之電路 圖，其中位準擴展單元及擴展參考電流設定單元為根據本 125635.doc -32- 200835377 發明之貫施例的圖5之元件； 圖7為位準壓縮單元及壓縮參考電流設定單元之電路 圖，其中位準壓縮單元及壓縮參考電流設定單元為根據本 發明之實施例的圖5之元件； • 圖8為根據本發明之實施例的移除周圍雜訊之方法的流 程圖； 圖9為根據本發明之另一實施例的移除周圍雜訊之方法 的流程圖； • ^ 、 圖10為根據本發明之又一實施例的移除周圍雜訊之方法 的流程圖； 圖11為根據本發明之實施例的移除周圍雜訊之裝置的電 路圖； 圖12為展示圖^之輸入位準調整電路單元的詳細電路 圖； _13為展示圖丨丨之頻率限制電路單元的詳細電路圖； • ®14為展示圖13之電路圖之輸出頻率特徵的圖表；及 圖15為根據本發明之實施例的裝備有移除周圍雜訊之裝 置的行動通信終端機的方塊圖。 【主要元件符號說明】 10 麥克風 20 放大器 100 移除周圍雜訊之裝置 110 麥克風 120 參考位準收斂單元 125635.doc -33- 200835377Although the preferred embodiment of the present invention has been disclosed for purposes of illustration, those skilled in the art will appreciate that various modifications can be made without departing from the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conventional circuit diagram for removing surrounding noise entering via a microphone; FIG. 2 is a diagram showing input levels of input sound in a device for removing surrounding noise according to an embodiment of the present invention. FIG. 3 is a block diagram of removing surrounding noise according to an embodiment of the present invention; and FIG. 4 is a view of removing surrounding noise according to another embodiment of the present invention. FIG. 5 is a block diagram of an apparatus for removing surrounding noise according to still another embodiment of the present invention; FIG. 6 is a circuit diagram of a level expansion unit and an extended reference current setting unit, wherein the level expansion unit and The extended reference current setting unit is the element of FIG. 5 according to the embodiment of the invention of 125635.doc-32-200835377; FIG. 7 is a circuit diagram of the level compression unit and the compression reference current setting unit, wherein the level compression unit And the compressed reference current setting unit is an element of FIG. 5 according to an embodiment of the present invention; • FIG. 8 is a flow chart of a method of removing surrounding noise according to an embodiment of the present invention; FIG. 9 is another according to the present invention. A flowchart of a method of removing surrounding noise in an embodiment; • FIG. 10 is a flow chart of a method of removing surrounding noise according to still another embodiment of the present invention; FIG. 11 is an embodiment of the present invention. Figure 12 is a detailed circuit diagram showing the input level adjustment circuit unit of Figure 2; _13 is a detailed circuit diagram showing the frequency limiting circuit unit of the figure; • 14 is shown in Figure 13 A graph of the output frequency characteristics of the circuit diagram; and FIG. 15 is a block diagram of a mobile communication terminal equipped with means for removing ambient noise in accordance with an embodiment of the present invention. [Main component symbol description] 10 Microphone 20 Amplifier 100 Device for removing surrounding noise 110 Microphone 120 Reference level convergence unit 125635.doc -33- 200835377
130 輸入位準限制單元 140 參考電流設定單元 150 可變放大單元 160 可變電阻單元 170 輸出位準調整單元 180 輸出位準限制單元 190 頻率限制單元 210 麥克風 220 預處理電路單元 221 輸入位準調整電路單元 223 輸入位準限制電路單元 230 後處理電路單元 231 輸出位準限制電路單元 233 頻率限制電路單元 240 全波整流電路單元 250 可變放大電路單元 260 可變電阻器電路單元 270 位準轉換電路單元 290 頻率限制電路單元 300 行動通信終端機 310 移除周圍雜訊之裝置 311 參考位準收斂單元 312 輸入位準限制單元 313 參考電流設定單元 -34- 125635.doc 200835377 314 可變放大單元 315 可變電阻單元 316 輸出位準調整單元 317 輸出位準限制單元 318 頻率限制單元 320 語音處理單元 330 無線通信單元 340 控制單元 350 鍵輸入單元 360 顯示單元 370 記憶體 380 介面單元 390 麥克風 400 移除周圍雜訊之裝置 410 麥克風 420 參考位準收斂單元 430 輸入位準限制單元 440 參考電流設定單元 450 可變放大單元 460 可變電阻單元 470 輸出位準調整單元 480 輸出位準限制單元 490 頻率限制單元 500 移除周圍雜訊之裝置 125635.doc -35- 200835377 510 麥克風 520 位準壓縮單元 530 壓縮參考電流設定單元 540 擴展參考電流設定單元 550 位準擴展單元 560a 第一可變電阻單元 560b 第二可變電阻單元 570a 第一位準調整單元130 input level limiting unit 140 reference current setting unit 150 variable amplifying unit 160 variable resistance unit 170 output level adjusting unit 180 output level limiting unit 190 frequency limiting unit 210 microphone 220 preprocessing circuit unit 221 input level adjusting circuit Unit 223 Input level limit circuit unit 230 Post-processing circuit unit 231 Output level limit circuit unit 233 Frequency limit circuit unit 240 Full-wave rectification circuit unit 250 Variable amplification circuit unit 260 Variable resistor circuit unit 270 Level conversion circuit unit 290 frequency limiting circuit unit 300 mobile communication terminal 310 device for removing surrounding noise 311 reference level convergence unit 312 input level limiting unit 313 reference current setting unit -34 - 125635.doc 200835377 314 variable amplification unit 315 variable Resistor unit 316 output level adjustment unit 317 output level limit unit 318 frequency limit unit 320 voice processing unit 330 wireless communication unit 340 control unit 350 key input unit 360 display unit 370 memory 380 interface unit 39 0 Microphone 400 Device for removing surrounding noise 410 Microphone 420 Reference level convergence unit 430 Input level limit unit 440 Reference current setting unit 450 Variable amplification unit 460 Variable resistance unit 470 Output level adjustment unit 480 Output level limit Unit 490 frequency limiting unit 500 means for removing surrounding noise 125635.doc -35- 200835377 510 microphone 520 level compression unit 530 compression reference current setting unit 540 extended reference current setting unit 550 level expansion unit 560a first variable resistance Unit 560b second variable resistance unit 570a first alignment adjustment unit
570b 第二位準調整單元 580 輸出位準限制單元 590 頻率限制單元570b second level adjustment unit 580 output level limit unit 590 frequency limit unit
125635.doc -36-125635.doc -36-
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060100739A KR100844888B1 (en) | 2006-10-17 | 2006-10-17 | Apparatus and method for noise removal |
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| TWI477258B (en) * | 2011-11-16 | 2015-03-21 |
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| US5896449A (en) * | 1993-12-02 | 1999-04-20 | Alcatel Usa Sourcing L.P. | Voice enhancement system and method |
| JP2004297273A (en) | 2003-03-26 | 2004-10-21 | Kenwood Corp | Apparatus and method for eliminating noise in sound signal, and program |
| KR100649986B1 (en) * | 2004-11-24 | 2006-11-27 | 삼성전자주식회사 | Apparatus and method for eradication noise of voice signal on mobile communication terminal |
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