200931392 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種音訊播放系統，特別是有關於 一種利用超音波音束的方式傳送聲音之音訊播放系統。 【先前技術】 目前，習知聲音傳輸多以散射的方式傳輸，因此當 ' 使用者在享受影音休閒活動或玩遊戲機的同時，所發出 ^ 的聲響會影響到鄰近的其他人，因此而有了超音波音束 嘲口八（Hyper Sonic Sound Speaker，HSS Speaker )的產生。 超音波音束剩队是一種利用超音波以傳輸聲音的技術， 它利用超音波能量將聲音聚集成音束，由於音束的發散 角度很小，因此聲音的能量可以傳遞很遠不擴散且衰減 程度很小。當傳遞至使用者端時，使用者不需配戴無線 或有線的耳機即可聽到聲音，從而消除了佩戴耳機的不 舒服與噪音擴散污染等問題。然而，也因為發散角度很 ❹小，因此，若是使用者沒有在超音波音束剩π八所發出音 束的角度範圍内，便無法聽到聲音。 有鑑於習知技藝之各項問題，為了能夠兼顧解決 之，本發明人基於多年研究開發與諸多實務經驗，提出 一種音訊播放系統，以作為改善上述缺點之實現方式與 依據。 5 200931392 【發明内容】 有鑑於此，本發明之目的就是在提供一種音訊播放 系，，可將音源訊號轉換成音束傳輸至特定接收端，以 提高使用者利用此裝置接收聲音之便利性。 根據本發明之目的’提出一種音訊播放系統，係連 接-電子裝置並輸出-音源訊號予—接收端，音訊播放 系統係包含一音訊輸入單元、一音束輸出單元、一感應 0單元及一控制單元。音訊輸入單元係具有一第一介面模 組，第一介面模組係用以與電子裝置連接，以接收音源 訊號，音束輸出單元係將音源訊號轉換為一音束之形式 輸出，感應單元係用以追蹤接收端之一位置，控制單元 係依據接收端之位置以控制音束輸出單元輸出音束之方 向與接收端之位置相對應。 承上所述，因依本發明之音訊播放系統，具有以下 優點： ❹ （1)此音訊播放系統可藉由音束輸出單元將音源訊 號轉換為一音束之形式輸出，藉此可提高接收聲音之便 利性。 (2)此音訊播放系統可藉由人臉偵測模組進行追 蹤，藉此可提高音訊播放系統使用上之便利性。 茲為使貴審查委員對本發明之技術特徵及所達到 之功效有更進一步之暸解與認識，謹佐以較佳之實施例 及配合詳細之說明如後。 6 200931392 【實施方式】 以下將參照相關圖式，說明依本發明較佳實施例之 音訊播放系統，為使便於理解，下述實施例中之相同元 件係以相同之符號標示來說明。 請參閱第1圖，其係繪示本發明之音訊播放系統之 方塊示意圖。圖中，音訊播放系統1係連接一電子裝置 10並輸出一音源訊號101予一接收端，音訊播放系統1 ❹係包含一音訊輸入單元11、一音束輸出單元12、一感應 單元13及一控制單元14。音訊輸入單元u係具有一第 一介面模組111，第一介面模組U1係用以與電子裝置連 接10，以接收音源訊號101 ,音束輸出單元12係將音源 訊號101轉換為一音束121之形式輸出，感應單元13係 用以追蹤接收端15之方位，控制單元14係依據接收端 15之方位以控制音束輸出單元12輸出音束121之方向。 其中’第一介面模組111係分別利用一 USB介面模 ❹組、一 AV介面端子、一 S介面端子或一數位介面端子與 一電視機、一電腦或一遊戲機或其他多媒體電子裝置結 合為一體，以將電子裝置作為一音源。音訊播放系統、 最佳為一超音波音束主動追蹤喇队。音源訊號101可為 一類比形式之音源訊號或一數位形式之音源訊號。 九此外，音束輸出單元12係將音源訊號101轉換成一 曰束111之形式，其最大特徵係以一種類似雷射光能量 聚集不分2的技術，將音源訊號101轉換成為一音束ill 之形式，音束具有很小之發散角度，因此聲音的能量可 7 200931392 以傳遞很遠卻不會嚴重衰減，接收端15不需配置無線或 有線的耳機，即可聽到聲音，也因為如此，若接收端15 在非音束傳遞的夾角範圍内，則接收端15無法接收音束 111，也就聽不到聲音。 再者，上述之而感應單元13係可包含一攝影機及一 人臉偵測模組，人臉偵測模組係可整合一人臉偵測功 月b、一光線補償功能以及一人臉辨識功能以追蹤接收端 15之方位。感應單元13亦可包含一標記偵測模組，利用 ^ 一辨識標記配戴於接收端15身上，使感應單元13得以 直接感應配戴於接收端15身上之辨識標記以追蹤ι5之 一位置，使控制單元14依據感應單元13所感應到之接 收端15方位以輸出音束121，使音束121輸出之方向與 接收端15之位置相對應。 、 請參閱第2圖，其為本創作之音訊播放系統之較佳 實施例之方塊示意圖。圖中，超音波音束主動追蹤喇〇八2 〇係與一家庭劇院20相連接，其中，超音波音束主動追蹤 喇叭2至少具有一 AV介面端子21、一音束輸出晶片22、 一感應器23及一微控制器24。AV介面端子21係自家庭 劇院20接收一音源訊號201，音束輸出晶片22係將音 訊號加轉換為-超音波音束221之形式後輸出㈣^ 觀賞者收聽。 感應23藉由攝影機231、人臉 貞測模組232及標 記偵測模組233以追蹤觀賞者25之方位，攝影機231用 以擷取一觀賞者25之影像，人臉偵測模組232係經由影 8 200931392 像處理步驟，從而得到一獨立且完整之人臉影像，藉此 可追蹤觀賞者25之人臉影像以確認觀賞者25的位置， 而標記偵測模組233係用以偵測觀賞者25所配戴之辨識 標記之方位251，如此可以不需攝影機231、人臉偵測模 組232，亦可追蹤觀賞者之方位。 由於人臉影像易受到背景光線的影響，因此人臉偵 測模組232更具有一光線補償功能，其係以一背景光線 ' 分布函數為基準，以調整人臉影像，使人臉影像不易受 〇 到一光線之強度及照射角度而產生劇烈之變化，增加辨 識的正確度。微控制器24即依據感應器23所追蹤之人 臉影像或辨識標記251之方位，以確認觀賞者25之方 位，以控制音束輸出晶片22輸出超音波音束221之輸出 方向。 其中，人臉偵測模組232更可包含一人臉辨識功能， 人臉辨識功能係藉由一影像多重型變，定位出人臉位置 並擷取人臉特徵，例如眼睛、鼻子及嘴巴等五官特徵， ® 以確認一特定使用者之方位。因此，即使觀賞者25處於 人群之中，人臉辨識功能仍可依據觀賞者25臉部之五官 特徵判斷出觀賞者25的正確方向，使音束輸出晶片22 得以將超音波音束221輸出到觀賞者25的位置。因此， 人臉辨識功能可解決人臉偵測模組232可能產生之誤 差，得到高穩定度及高正確度的辨識效果，藉此，即使 觀賞者25處在人群之中，亦能有效的利用超音波音束主 動追蹤喇β八2以聆聽音樂。 9 200931392 以上所述僅為舉例性，而非為限制性者。任何未脫 離本發明之精神與範疇，而對其進行之等效修改或變 更，均應包含於後附之申請專利範圍中。 【圖式簡單說明】 第1圖係為本創作之音訊播放系統之方塊示意圖；以及 第2圖係為本創作之音訊播放系統之較佳實施例示意圖。 【主要元件符號說明】 I :音訊播放系統； 10 :電子裝置； 101 :音源訊號； II :音訊輸入單元； III :第一介面模組； 12 :音束輸出單元； 121 :音束； 13 :感應單元； 14 :控制單元； 15 :接收端； 2:超音波音束主動追蹤喇队； 20 :家庭劇院； 201 :音源訊號； 21 : AV介面端子； 22 :音束輸出晶片； 221 :超音波音束； 23 :感應器； 200931392 231 :攝影機； 232 :人臉偵測模組； 233 :標記偵測模組； 24 :微控制器； 25 :觀賞者；以及 251 :辨識標記。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio playback system, and more particularly to an audio playback system for transmitting sound by means of an ultrasonic sound beam. [Prior Art] At present, conventional sound transmission is mostly transmitted in a scattering manner. Therefore, when a user enjoys audio-visual leisure activities or playing a game machine, the sound of the sound that is emitted affects other people in the vicinity, and thus The generation of the Hyper Sonic Sound Speaker (HSS Speaker). Ultrasonic Tone Remaining is a technique that uses ultrasonic waves to transmit sound. It uses ultrasonic energy to gather sound into a sound beam. Since the divergence angle of the sound beam is small, the energy of the sound can be transmitted far away without diffusion and attenuation. To a lesser extent. When delivered to the user end, the user can hear the sound without wearing a wireless or wired earphone, thereby eliminating the problems of uncomfortable wearing of the earphone and noise diffusion. However, since the divergence angle is also small, the sound cannot be heard if the user does not have an angle within the range of the sound beam emitted by the ultrasonic beam. In view of the problems of the prior art, the present inventors have proposed an audio playback system based on years of research and development and many practical experiences, in order to solve the above problems. 5 200931392 SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide an audio playback system that converts a sound source signal into a sound beam for transmission to a specific receiving end to improve the convenience of the user to receive sound using the device. According to the purpose of the present invention, an audio playback system is provided, which is a connection-electronic device and outputs an audio signal to the receiving end. The audio playback system includes an audio input unit, a sound beam output unit, a sensing 0 unit and a control. unit. The audio input unit has a first interface module, and the first interface module is connected to the electronic device to receive the sound source signal, and the sound beam output unit converts the sound source signal into a sound beam output, and the sensing unit is For tracking the position of the receiving end, the control unit controls the direction of the output beam of the sound beam output unit according to the position of the receiving end to correspond to the position of the receiving end. As described above, the audio playback system according to the present invention has the following advantages: (1) The audio playback system can output the audio signal into a sound beam by the sound beam output unit, thereby improving reception. The convenience of sound. (2) The audio playback system can be tracked by the face detection module, thereby improving the convenience of the audio playback system. For a better understanding of the technical features of the present invention and the efficacies of the present invention, the preferred embodiments and the detailed description are as follows. [Embodiment] Hereinafter, an audio playback system according to a preferred embodiment of the present invention will be described with reference to the related drawings. For the sake of understanding, the same elements in the following embodiments are denoted by the same reference numerals. Referring to Figure 1, there is shown a block diagram of an audio playback system of the present invention. In the figure, the audio playback system 1 is connected to an electronic device 10 and outputs an audio source signal 101 to a receiving end. The audio playback system 1 includes an audio input unit 11, a sound beam output unit 12, a sensing unit 13 and a Control unit 14. The audio input unit u has a first interface module 111. The first interface module U1 is connected to the electronic device 10 for receiving the sound source signal 101, and the sound beam output unit 12 converts the sound source signal 101 into a sound beam. In the form of 121, the sensing unit 13 is used to track the orientation of the receiving end 15, and the control unit 14 controls the direction in which the sound beam output unit 12 outputs the sound beam 121 according to the orientation of the receiving end 15. The first interface module 111 is respectively combined with a television, a computer or a game machine or other multimedia electronic device by using a USB interface module, an AV interface terminal, an S interface terminal or a digital interface terminal. Integral to use the electronic device as a sound source. The audio playback system, preferably an ultrasonic sound beam, actively tracks the racquet. The sound source signal 101 can be a sound source signal of a analog type or a sound source signal of a digital form. In addition, the sound beam output unit 12 converts the sound source signal 101 into a form of a beam 111, the maximum characteristic of which is a technique similar to the laser light energy gathering without dividing 2, converting the sound source signal 101 into a sound beam ill form. The sound beam has a small divergence angle, so the energy of the sound can be transmitted far away without severe attenuation. The receiving end 15 can hear the sound without having to configure a wireless or wired earphone, and because of this, if receiving When the end 15 is within the range of the non-intelligence transmission, the receiving end 15 cannot receive the sound beam 111, and no sound is heard. Furthermore, the sensing unit 13 can include a camera and a face detection module. The face detection module can integrate a face detection function b, a light compensation function and a face recognition function to track The orientation of the receiving end 15. The sensing unit 13 can also include a mark detecting module, which is attached to the receiving end 15 by using an identification mark, so that the sensing unit 13 can directly sense the identification mark worn on the receiving end 15 to track one position of the ι5. The control unit 14 is caused to output the sound beam 121 according to the orientation of the receiving end 15 sensed by the sensing unit 13, so that the direction of the output of the sound beam 121 corresponds to the position of the receiving end 15. Please refer to FIG. 2, which is a block diagram of a preferred embodiment of the audio playback system of the present invention. In the figure, the ultrasonic sound beam active tracking Rabbin 8 2 is connected with a home theater 20, wherein the ultrasonic sound beam active tracking speaker 2 has at least one AV interface terminal 21, a sound beam output chip 22, and an induction. The device 23 and a microcontroller 24. The AV interface terminal 21 receives an audio source signal 201 from the home theater 20, and the sound beam output chip 22 converts the audio signal into a form of the - ultrasonic sound beam 221 and outputs it (4). The camera 23 is used to capture the orientation of the viewer 25 by the camera 231, the face detection module 232 and the marker detection module 233. The camera 231 is used to capture an image of the viewer 25, and the face detection module 232 is used. Through the processing steps of the image 8 200931392, an independent and complete face image is obtained, thereby tracking the face image of the viewer 25 to confirm the position of the viewer 25, and the mark detection module 233 is used for detecting The orientation 251 of the identification mark worn by the viewer 25 can be used to track the orientation of the viewer without the camera 231 and the face detection module 232. Since the face image is susceptible to the background light, the face detection module 232 has a light compensation function, which is based on a background light distribution function to adjust the face image, so that the face image is not easily affected. A sharp change occurs in the intensity of the light and the angle of illumination, increasing the accuracy of the recognition. The microcontroller 24 determines the orientation of the viewer 25 based on the orientation of the face image or the identification mark 251 tracked by the sensor 23 to control the output direction of the ultrasonic beam 221 output from the beam output chip 22. The face detection module 232 can further include a face recognition function. The face recognition function locates the face position and captures facial features, such as eyes, nose, and mouth, by means of an image multiple change. Features, ® to confirm the orientation of a particular user. Therefore, even if the viewer 25 is in the crowd, the face recognition function can judge the correct direction of the viewer 25 according to the facial features of the face of the viewer 25, so that the beam output chip 22 can output the ultrasonic beam 221 to The location of the viewer 25. Therefore, the face recognition function can solve the error that the face detection module 232 can generate, and obtain the recognition effect of high stability and high accuracy, thereby effectively utilizing the viewer 25 in the crowd. The ultrasonic beam is actively tracked to listen to music. 9 200931392 The above description is for illustrative purposes only and not as a limitation. Any changes or modifications to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an audio playback system of the present invention; and FIG. 2 is a schematic diagram of a preferred embodiment of the audio playback system of the present invention. [Main component symbol description] I: audio playback system; 10: electronic device; 101: audio source signal; II: audio input unit; III: first interface module; 12: sound beam output unit; 121: sound beam; Induction unit; 14: Control unit; 15: Receiver; 2: Ultrasonic beam active tracking racquet; 20: Home theater; 201: Audio signal; 21: AV interface terminal; 22: Sound beam output chip; Sound wave beam; 23: sensor; 200931392 231: camera; 232: face detection module; 233: mark detection module; 24: microcontroller; 25: viewer; and 251: identification mark.