201112755 六、發明說明： 【發明所屬之技術領域】 本發明係有關於’用來實現可讓三者以上參加之視訊 通話機能的系統。 【先前技術】 透過網際網路或其他通訊線路而在多地點間實現視訊 講義或視訊會議等的視訊通話系統，已爲公知（例如參照 下記非專利文獻）。 在既存的系統中，是提高映像資料的壓縮率，及/或 縮小映像畫格的尺寸或是解析度，以預防通訊線路的頻寬 達到瓶頸。可是，造成白板的板書或文件的文字無法閱讀 、模型或實物的細節看不清楚等等，有損視訊講義或視訊 會議等的意義。 雖然期望所交換的映像之高品質化是人人均等，但是 若對三者以上的人都分別發送高品質的映像，則當場就會 造成通訊頻寬不足。一旦通訊頻寬不足，則會發生映像掉 格或是聲音中斷，關於重要話題的講義或會議，已經難謂 合適。爲了避免這點，使用可保證足夠大之最低通訊速度 的非Best effort型的專線，或是在各參加者（地點）間設 置 MCU ( Multi-point Control Unit)，是有效的。但是， 無論如何，都無法避免鉅額的投資。 雖然也有考慮利用IP ( Internet Protocol)多點傳播技 術，但在現況下，在網際網路等公眾線路上進行多點傳播 -5- 201112755 通訊，一般是不被允許。 [先前技術文獻] [非專利文獻] [非專利文獻 1]“XVD CamCast(R)CX”、[online]、[2009 年 7月 14日檢索]、網際網路 < URL http://www.marubeni-sys·com/bs/xvci/cx·html > 【發明內容】 [發明所欲解決之課題] 有鑑於以上問題，本發明的目的在於，在有三者以上 之參加者存在的視訊講義或視訊會議等中，能以比較廉價 之投資來實現交換映像之高品質化。 [用以解決課題之手段] 在本發明中’係構成了一種視訊通話系統，係屬於在 主側終端與複數從側終端之間透過電氣通訊線路而實現伴 隨映像之收送訊的視訊通話機能用的系統，其特徵爲，主 側終端係具備：交訊權指定受理部，係受理操作輸入，其 係用來從複數從側終端之中’指定欲授與相互交訊權之從 側終端；和交訊權賦予資訊發訊部，係對於被指定成爲欲 授與相互交訊權的從側終端，發送出用來授與相互交訊權 之意旨的資訊亦即交訊權賦予資訊；和通話收訊部，係將 從授與有現在相互交訊權的從側終端所獲取過來的影像， 加以接收；和通話輸出控制部，係將從授與有現在相互交 -6 - 201112755 訊權的從側終端所接收到的映像，顯示在顯示器之畫面； 和通話發訊部，係將在該當主側終端的設置場所中以攝影 機所拍攝到之映像，對複數從側終端之各者，進行發送； 從側終端係具備：通話收訊部，係將從主側終端所獲取過 來的影像，加以接收；和通話輸出控制部，係將從主側終 端所接收到的映像’顯示在顯示器之畫面；和交訊權賦予 資訊收訊部’係將從主側終端所獲取過來的交訊權賦予資 訊’加以接收；和通話發訊部，係只有在接收了交訊權賦 予資訊而被給予了現在相互交訊權的情況下，才把在該當 從側終端之設置場所以攝影機所拍攝到的映像，對主側終 端進行發送。 在視訊講義或視訊會議等中，現實上，並非所有的參 加者都需要其他所有參加者的映像。無論講義還是會議， 通常不會考慮全部參加者都是對等的。在講義中通常是講 師或演講者、在會議中通常是議長或主持人，掌握有主控 權。又’也幾乎沒有多數人同時發言的情況。本發明係有 鑑於此種事情而硏發，係設計成，掌握主控權的主側終端 的映像係恆常地對所有從側終端配訊，另一方面，從側終 端的映像係僅發送至主側終端，而且，僅擁有現在相互交 訊權之從側終端，會對主側終端發送映像。 若依據本發明，則可爲三者以上能同時參加的系統， 並且彼此能收送映像的係被限制成僅一部分，因此即使所 交換的映像是高品質化，仍可降低通訊頻寬不足的可能性 。而且’不必使用專線或M C U、或IP多點傳播，能以比較 201112755 廉價之投資來運用系統。 前記從側終端的通話發訊部，係只有在接收了交訊權 賦予資訊而被給予了現在相互交訊權的情況下，才把在該 當從側終端之設置場所以麥克風所收音（係指收集現場的 聲音’包含錄音）到的聲音’對主側終端進行發送；前記 主側終端的通話收訊部，係將從授與有現在相互交訊權的 從側終端所獲取過來的聲音，加以接收；前記主側終端的 通話輸出控制部’係將從授與有現在相互交訊權的從側終 端所接收到的聲音，從揚聲器進行聲音輸出；前記主側終 端的通話發訊部’係將在該當主側終端的設置場所中以麥 克風所收音到之聲音，對複數從側終端之各者，進行發送 ’並且’將從授與有現在相互交訊權的從側終端所接收到 的聲音’對未給予現在相互交訊權的從側終端，進行發送 ;前記從側終端的通話收訊部，係將從主側終端所獲取過 來的聲音，加以接收；前記從側終端的通話輸出控制部， 係將從主側終端所接收到的聲音，從揚聲器進行聲音輸出 。若爲此種系統，則只有主側終端的聲音及擁有相互交訊 權的從側終端的聲音，會配送至各參加者。藉此，可更進 一步謀求通訊頻寬之消耗量的節省。不僅如此，還可適宜 地控制器各者的發言權，可成爲有秩序的講義營運、會議 營運。若講明白一點，就是可遮斷竊竊私語或人身攻擊等 〇 前記主側終端的交訊權指定受理部，係可受理，欲每 隔所定時間就將授與相互交訊權的從側終端依序加以切換 -8 - 201112755 之意旨的指定；前記主側終端的交訊權賦予資訊發訊部， 係當已受理了欲每隔所定時間就將授與相互交訊權的從側 終端依序加以切換之意旨的指定的情況下，就將發送交訊 權賦予資訊之對象的從側終端，依序加以切換。若爲此種 系統，則從主側終端的使用者來看，例如會是每數十秒乃 至每數分鐘地，自動切換從側終端的使用者之映像（甚至 聲音）。因此，可容易掌握所有從側終端之使用者的動靜 前記從側終端係還具備：交訊權要求受理部，係受理 一欲要求相互交訊權之意旨的操作輸入；和交訊權要求資 訊發訊部，係當已受理了欲要求相互交訊權之意旨的操作 輸入時，則對主側終端發送用來要求相互交訊權之意旨的 資訊亦即交訊權要求資訊；前記主側終端係還具備：交訊 權要求資訊收訊部，係將從未授與現在相互交訊權之從側 終端所獲取過來的交訊權要求資訊，加以接收；和交訊權 要求輸出控制部，係將是從哪台從側終端接收到交訊權要 求資訊，顯示在顯示器之畫面。若爲此種系統，則從側終 端的使用者就可因應需要而對主側終端的使用者要求相互 交訊權。並且，主側終端的使用者，係可參酌從側終端的 使用者之請願，而選擇要給予相互交訊權的對象。 若前記主側終端也兼備作爲前記從側終端之機能，則 主側終端與從側終端就可共通化，可降低終端的製作成本 -9 - 201112755 [發明效果] 若依據本發明，則在有三者以上之參加者存在的視訊 講義或視訊會議等中，能以比較廉價之投資來實現交換映 像之高品質化。 【實施方式】 參照圖面來說明本發明的一實施形態。如圖1所示， 本實施形態的視訊通話系統係被架構成，將分散設置於各 處的終端1，透過網際網路、WAN (Wide Area Network) ' LAN ( Local Area Network)等之電氣通訊線路2，而連 接成彼此可相互通訊。這些終端1當中至少一個會成爲主 側終端1 1，其餘的複數係成爲從側終端1 2。 如圖2所示，終端1係具備處理器1 a、主記憶體1 b、輔 助記憶裝置lc、操作輸入裝置Id、麥克風le、揚聲器If、 音訊編解碼器lg、攝影機lh、顯示器li、視訊編解碼器lj 、通訊介面1 k等之硬體資源，這些係受控制器（系統控制 器、I/O控制器等）11所控制而會協同動作。 輔助記憶裝置1 c，係爲硬碟驅動機、快閃記憶體、光 學碟片驅動機，或其他。 操作輸入裝置Id係爲可用手指操作的下壓按鈕、觸控 面板、軌跡板等之指標裝置，但在本實施形態中係想定爲 可和終端1無線交訊的遙控器。 音訊編解碼器lg，係將透過麥克風le所收音的聲音予 以編碼，或將已被編碼之聲音資訊加以解碼而從揚聲器If -10- 201112755 進行聲音輸出等。視訊編解碼器lj，係將透過攝影機lh所 拍攝的映像予以編碼，或將已被編碼之映像資訊加以解碼 而顯示輸出在顯示器li的畫面中。音訊編解碼器lg、視訊 編解碼器lj，係分別亦可不是由硬體而是由軟體來實作。 通訊介面1 g，係用來透過電氣通訊線路2進行資訊通 訊所需之設備，以NIC ( Network Interface Card )或無線 LAN收發訊器爲代表，但除此以外亦可採用USB ( Universal Serial Bus ) 、IEEE 1 394 等之介面。 終端1，基本上是以架構出本系統爲目的而被製作的 專用機器。但是，亦可對通用的個人電腦、工作站、視訊 遊戲機等，安裝必要的程式，來構成本發明所述之終端1 0 應被處理器1 a所執行的程式係被儲存在輔助記憶裝置 1 c中，在程式執行之際，被從輔助記憶裝置〗c讀入至主記 億體1 b，而被處理器1 a所解讀。終端1，係依照程式而驅 動上記硬體資源，發揮圖3所示的主側終端1 1之機能，以 及圖4所示的從側終端1 2之機能。 作爲主側終端1 1係具備有：電話簿記憶部1 1 1、通話 要求發訊部1 1 2、通話收訊部1 1 3、通話輸出控制部丨丨4、 通話發訊部115、交訊權要求資訊收訊部116、交訊權要求 輸出控制部1 1 7、交訊權指定受理部1 1 8、交訊權賦予資訊 發訊部1 19。 電話簿記億部1 1 1，係將一或複數（例如最大1 〇〇件） 的終端1的識別資訊及關於該當終端1的屬性資訊，利用主 1. -11 - 201112755 記憶體1 b或輔助記憶裝置1 c的記憶領域而加以記憶。識別 資訊係爲，例如 IP位址、SIP ( Session Initiation Protocol )位址、其他URI爲代表的用來識別通訊對象用的資訊。 屬性資訊，係爲對方的姓名或名稱、所屬、所在地或其他 關於對方的資訊，在本實施形態中係爲字串資訊。圖5中 係例示，電話簿記憶部1 1 1所記憶之資訊。電話簿記憶部 1 11，係針對可作爲視訊通話對方之候補的其他終端1，就 每一終端1，將識別資訊及屬性資訊，與ID號碼等建立關 連而加以記憶。 其他終端1的識別資訊及屬性資訊，係若也有被直接 以手動輸入的話，則也會從透過電氣通訊線路2所連接之 其他終端1或電腦被發送過來。終端1，係將其他終端1的 識別資訊及屬性資訊的輸入，透過操作輸入裝置1 d而加以 受理，或是利用通訊介面lk的機能而加以接收，登錄至電 話簿（或位址簿）裡，亦即記億在電話簿記憶部1 1 1中。 過去曾進行過視訊通話的其他終端1的相關之識別資 訊及屬性資訊，亦可當作過去的通話履歷，而累積在電話 簿中。此情況下，作爲屬性資訊，是將表示是否有從我方 的發話（去電）還是來自對方的收話（來電）的資訊，或 表示與該終端1進行過視訊通話之日期的時間戳記等，一 倂記憶。尤其是，如圖5所示，關於曾參加過過去所舉辦 之視訊講義或視訊會議的複數終端1，可將該意旨的資訊 、和表示講義或會議之舉辦日期的時間戳記等，加以記億 -12- 201112755 通話要求發訊部1 1 2，係當舉辦視訊講義或視訊會議 等時候’把用來在參加該講義或會議的終端1之間進行視 訊通話所需的通話要求，利用通訊介面1 k的機能而加以發 送。在開始視訊講義或視訊會議等時，主側終端1 1與各從 側終端1 2之間’必須各自建立會談（s e s s i 〇 η )。原則上， 通話要求是從主側終端1 1往從側終端1 2發送。但是，亦可 爲，從從側終端1 2往主側終端1 1發送通話要求之樣態。 主側終端1 1，係將視訊通話對方之候補、亦即可能成 爲講義或會議之參加候補的其他終端1的清單，顯示在顯 示器li的畫面上。圖6係圖示候補之清單顯示例。最初被 當作候補而顯示的是，過去有參加過講義或會議（而其履 歷資訊是殘留在電話簿記憶部1 1 1中）的終端1。主側終端 1 1，係針對身爲候補的複數終端1之各者，從電話簿記憶 部1 1 1讀出識別資訊。然後，基於該識別資訊，對該當終 端1發送用來要求現場小圖示（圖中符號B)之送訊的資訊 亦即現場小圖示要求。現場小圖示’係在終端1之設置場 所拍攝到的即時之映像或靜止影像。現場小圖示的尺寸（ 例如1 9 2 X 1 0 8像素），係小於視訊講義或視訊會議時所交 換的映像之尺寸（例如1 9 2 0 X 1 〇 8 0像素）。現場小圖示的 畫格速率，係受到各終端1所連接之電氣通訊線路2的頻寬 之影響，但爲5fps左右或其以上。 在本實施形態的系統中’原則上’終端1彼此是透過 電氣通訊線路2而以點對點的形態相互連線。亦即’在實 施視訊講義或視訊會議時’不需要使用其他的中繼伺服器 -13- 201112755 或MCU等之中繼機。若識別資訊是IP位址這類不需要做位 址解析的資訊，則可使用該識別資訊立刻對終端1發送現 場小圖示要求。若識別資訊是SIP位址這類需要位址解析 的情況下，則使用該識別資訊而對其他電腦（例如SIP代 理伺服器）發送邀請訊息等，然後與受話側終端1 2之間建 立會談，其後才發送現場小圖示要求。或者，將該識別資 訊發送至具備位址解析能力的其他電腦（例如DNS ( Domain Name System)伺服器）然後將該當識別資訊所對 應之IP位址等，從該電腦予以接收，使用該IP位址等而向 終端1發送現場小圖示要求。 接收到現場小圖示要求的終端1，在通常的情況下， 係將以攝影機1 h所拍攝到的現場小圖示，向獲取到該現場 小圖示要求的終端1，進行發送。在主側終端1 1中，將從 各終端1回送的現場小圖示予以接收，連同該當終端的屬 性資訊（圖中符號A) —起顯示在顯示器丨丨的畫面上。至 於無法接收現場小圖示的終端1，則由於無法顯示出現場 小圖示，因此將表示該意旨的影像或字串予以顯示出來。 在圖6所示的例子中，「連線中...」之顯示（圖中符號c )係表示’對該終端1發送現場小圖示要求，在等待回應 。「無法通訊」之顯示（圖中符號D )係表示，對該終端1 發送了現場小圖示要求後經過一定時間都沒有回應被送返 ，亦即因爲某種原因（終端1的電源被切斷、終端1所連接 的通訊線路發生障礙等等）導致無法與該當終端1建立會 談。「無法顯示」之顯示（圖中符號E)係表示，雖然對 -14- 201112755 終端1發送了現場小圖示要求，但現場小圖示要求被拒絕 ’換言之’不進行現場小圖示送訊之意旨的回應，是作爲 現場小圖示的替代而被發送過來。「通話中」之顯示（圖 中符號F )係表示，雖然對終端1發送了現場小圖示要求， 但已經在和別的終端1進行視訊通話中之意旨的回應，是 作爲現場小圖示的替代而被發送過來。 然後’主側終端1，係將用來從被顯示在畫面上的候 補之中’指定要成爲視訊講義或視訊會議之參加者的複數 從側終端1 2的操作輸入，透過操作輸入裝置1 d而加以受理 °主側終端1的使用者，係操作著操作輸入裝置1 d而使游 標（圖中符號G )移動，點擊所望之從側終端1 2的資訊顯 示欄（圖中符號A、B )。受理到該操作的主側終端1，係 將被點擊之顯示欄所對應的終端1認知爲參加者，基於該 胃終端1所相關之識別資訊，對該當終端1發送用來要求視 _訊通話之開始的通話要求。即使該當從側終端1 2的相關之 識別資訊是需要位址解析，在現場小圖示要求的送訊階段 中已經建立會談或位址解析已經完成的情況下，可直接向 從側終端1 2發送通話要求。若非如此，則和現場小圖示要 求送訊時同樣地，進行會談建立或位址解析，然後向該當 從側終端1 2發送通話要求。順便一提，取代現場小圖示而 顯7K「無法通訊」或「通話中」之意旨的終端1，係無法 被指定成爲參加者（使游標無法移動到該終端1的相關之 資訊顯示欄）。 逋話收訊部1 1 3 ’係將起因於前記通話要求之發送而 1： •15- 201112755 從從側終端I 2所發送出來的映像及聲音，利用通訊介面i k 的機能而加以接收。但是，往主側終端1丨發送映像及聲音 的係僅限於擁有現在相互交訊權的從側終端i 2，通話收訊 部1 1 3所接收的也只有於該當從側終端丨2所拍攝及收音到 的映像、聲音。 通話輸出控制部1 1 4，係將從從側終端1 2所接收到的 通話中之映像，顯示在顯示器li的畫面上，同時，將從從 側終端1 2所接收到的通話中之聲音，從揚聲器i丨進行聲音 輸出。圖7係於主側終端1 1的視訊通話中之對方的映像的 顯示輸出例。在該通話畫面中’在擁有現在相互交訊權之 從側終端12所拍攝到的映像（圖中符號η )係被大畫面映 出。除此以外，通話輸出控制部1 1 4係在同通話畫面內， 將在主側終端Π之設置場所以攝影機1 h所拍攝到的自己的 映像（圖中符號I)，以小面積加以顯示。 通話發訊部1 1 5 ’係將在主側終端1 i的設置場所以攝 影機1 h所拍攝到的映像及以麥克風1 e所收音到的聲音，對 參加視訊講義或視訊會議的所有從側終端1 2，利用通訊介 面1 k的機能而加以發送。此外，在本實施形態中，係將擁 有現在相互交訊權的從側終端1 2的聲音，透過主側終端1 1 而對全部參加者的終端1進行配送、共享。藉此，通話發 訊部1 1 5，係對沒有相互交訊權的所有從側終端1 2，發送 出在主側終端1 1的設置場所所收音到的自己的聲音，同時 ，還將從擁有相互交訊權的從側終端1 2所接收到的聲音， 予以發送。此時，通話發訊部1 1 5係對麥克風1 e所收音到 -16- 201112755 的聲音，重疊上所接收到的聲音，將所得到的聲音資料， 加以送出。 交訊權要求資訊收訊部1 1 6，係將從從側終端1 2所獲 取的、用來要求相互交訊權之意旨的資訊亦即交訊權要求 資訊，利用通訊介面1 k的機能而加以接收。又，交訊權要 求受理部係也會接收，從從側終端1 2所獲取的、用來取消 相互交訊權之要求之意旨的資訊亦即取消資訊。 交訊權要求輸出控制部1 1 7，係將是從哪台從側終端 12接收到交訊權要求資訊，顯示在顯示器^的畫面。圖8 係圖示交訊權要求的顯示例。在該控制畫面中，關於參加 視訊講義或視訊會議的所有從側終端1 2，將屬性資訊（圖 中符號J )及其現在狀況，予以一覽顯示。於圖8所示的例 子中’ 「通訊中」之顯示（僵中符號K)係表示，與該從 側終端12之間建立好會談，對方從側終端12是可以接收從 主側終端1 1所送出的映像及聲音。然後，「發言請求」之 顯示（圖中符號L )係表示’從從側終端丨2接收到交訊權 要求資訊。當從已獲取交訊權要求資訊之從側終端12發送 出取消資訊’而接收到其時’則將「發言請求」之顯示變 回「通訊中」之顯示。順便一提，「切斷」之顯示（圖中 符號Μ )係表示’因爲某種理由而導致與該從側終端丨2之 間的會談被切斷。 控制畫面’係在視訊_義或視訊會議中，主側終端Η 的使用者透過操作輸入裝置Id進行所定操作時，才會被顯 示。控制畫面平常不被顯示的原因是_，相望不會妨礙到主 -17- 201112755 側終端1 1的使用者，特別是講師或演講者等的精神集φ。 藉由主側終端1 1的使用者的手，點擊操作「返回」按紐（ 圖中符號S)時，則圖8所示的控制畫面會被隱藏，返回至 圖7所示的原本之通話畫面。 此外，在圖8所示的控制畫面上，亦可取代「通訊中 」之顯示或「切斷」之顯示等，改成顯示上述的現場小圖 示。此情況下，受理了用來顯示控制畫面之所定操作的主 側終端1 1，是對各從側終端1 2發送現場小圖示要求，接收 到現場小圖示要求的從側終端1 2係拍攝現場小圖示影像然 後回送至主側終端11。然後，主側終端1 1係將已接收之現 場小圖示，顯示在控制器畫面內。又，主側終端1 1係當受 理了用來隱藏控制畫面所需之操作亦即「返回」按鈕之點 擊操作時，則向各從側終端1 2發送用來要求現場小圖示之 送訊停止之意旨的資訊。接收到其的從側終端1 2 ,係停止 現場小圖示影像的攝影及送訊。 在圖7所示的通話畫面被顯示的期間中，接收到交訊 權要求資訊時’則將其意旨（圖中符號Ν )在角落處小面 積顯示。已接收交訊權要求之意旨的顯示，係從同一從側 終端1 2接收到取消資訊時，就會消去。 交訊權指定受理部1 1 8，係將從複數從側終端丨2之中 指定欲授與相互交訊權之從側終端1 2用的操作輸入，透過 操作輸入裝置1 d而加以受理。主側終端丨的使用者，係在 圖8所示的控制畫面上，操作著操作輸入裝置1 d而使游標 (圖中符號〇 )移動，點擊在所望之從側終端丨2的欄位中 -18- 201112755 所顯示的「選擇」按鈕（圖中符號p)。受理了該操作的 主側終端1 1，係將被點擊之按鈕所對應的從側終端1 2 ’認 知成爲應授與相互交訊權之終端1 2。但是，關於目前已經 授與有相互交訊權的從側終端1 2，則是取代「選擇」按鈕 ，改爲顯示出用來表示該意旨之影像或字串（圖中符號Q )。 又，交訊權指定受理部118係可受理，欲每隔所定時 間就將授與相互交訊權的從側終端1 2依序加以切換之意旨 的指定。在圖8所示的畫面上，顯示著用來自動切換授與 相互交訊權之對象用的按鈕（圖中符號R)。這些按鈕， 係用來讓人選定切換週期的時間。在圖示的例子中，是可 從「10秒」、「30秒」、「1分」以及「3分」中做選擇。 主側終端1的使用者，係在圖8所示的控制畫面上，操作著 操作輸入裝置1 d而使游標移動，點擊所望週期時間的按鈕 。受理了該操作的主側終端1 1係獲知，要以被點擊之按鈕 所對應的時間週期，將授與相互交訊權之從側終端丨2進行 切換之指定，是已被進行之事實。 交訊權賦予資訊發訊部119’係對於被指定成爲欲授 與相互交訊權的從側終端1 2，將用來授與相互交訊權之意 旨的資訊亦即交訊權賦予資訊，利用通訊介面〗]£的機能而 加以發送。交訊權賦予資訊送訊部，係向已被主側終端i i 之使用者所指定的從側終端1 2，發送出交訊權賦予資訊， 同時’向至此爲止擁有相互交訊權的從側終端丨2，發送出 失去相互交訊權之意旨的交訊權失效資訊。 S. -19 - 201112755 藉由主側終端1 1的使用者，進行了欲每隔所定時間就 將授與相互交訊權的從側終端1 2依序加以切換之意旨的指 定時’則每隔使用者所選定之時間週期，向擁有現在相互 交訊權之從側終端1 2發送交訊權失效資訊，對該當於其下 一順位的沒有相互交訊權的從側終端1 2，發送交訊權賦予 資訊。 作爲從側終端1 2係具備有：通話要求收訊部〗2 1、通 話收訊部122、通話輸出控制部123、交訊權要求受理部 124、交訊權要求資訊發訊部125、交訊權賦予資訊收訊部 126、通話發訊部127。 通話要求收訊部121，係將從成爲視訊通話之對象的 主側終端1 1所發送來的通話要求，利用通訊介面1 k的機能 而加以接收。藉由通話要求的收訊，就確定了從側終端1 2 與主側終端1 1之相互通訊，以及從側終端1 2是參加到主側 終端1 1所舉辦的視訊講義或視訊會議之事實。 通話收訊部1 22，係將從主側終端1 1所發送出來的映 像及聲音，利用通訊介面1 k的機能而加以接收。通話收訊 部1 2 2所接收的映像，係在主側終端1 1所拍攝到的映像。 另一方面，通話收訊部1 22所接收的聲音，係當該當從側 終端1 2是擁有現在相互交訊權時，則只有在主側終端1 1所 收音到的聲音，但當沒有現在相互交訊權時，則是在主側 終端1 1所收音到的聲音及在擁有相互交訊權之從側終端12 所收音到的聲音。 通話輸出控制部1 23，係將從主側終端1 1所接收到的 -20- 201112755 通話中之映像’顯示在顯示器li的畫面上，同時，將從主 側終端1 1所接收到的通話中之聲音，從揚聲器丨£進行聲音 輸出。圖9係於從側終端〗2的視訊通話中之對方的映像的 顯示輸出例。在該通話畫面中，在主側終端丨丨所拍攝到的 映像（圖中符號T)係被大畫面映出。除此以外，通話輸 出控制部1 2 3係在同通話畫面內，將在該當從側終端丨2之 設置場所以攝影機1 h所拍攝到的自己的映像（圖中符號u )，以小面積加以顯示。 交訊權要求受理部1 2 4，係將欲對主側終端1 1之使用 者要求相互交訊權之意旨的操作輸入，透過操作輸入裝置 1 d而加以受理。在從側終端1 2中的通話畫面裡係顯示有「 發Η請求」按鈕（圖中符號V)。請求相互交訊權之賦予 的從側終端1 2之使用者，係在圖9所示的畫面上，操作著 操作輸入裝置Id而使游標（未圖示）移動，點擊「發言請 求」按鈕。受理了該操作的從側終端1 2，係獲知有欲要求 相互交訊權之意旨的指令。 交訊權要求資訊發訊部125，係當受理了欲要求相互 交訊權之意旨的操作輸入時’對主側終端1 1，將交訊權要 求資訊，利用通訊介面1k的機能而加以發送。 交訊權要求資訊的送訊後，在從側終端1 2的通話畫面 裡，如圖10所示，會顯示出表示該意旨的影像或字串（圖 中符號W)，並且取代「發SS靑求」按鈕改爲顯示「請求 中止」按鈕（圖中符號X )。藉由從側終端1 2的使用者的 手，點擊操作「請求中止」按鈕之際，則對主側終端1 1發 -21 - 201112755 送取消資訊，消去「發言請求中」顯示，將「請求中止」 按鈕變回「發言請求」按鈕。 交訊權賦予資訊收訊部1 26，係將從主側終端丨丨所獲 取之交訊權賦予資訊’利用通訊介面Ik的機能而加以接收 。又，交訊權賦予資訊收訊部1 2 6，係也會接收從主側終 端11所獲取之交訊權失效資訊。 通話發訊部1 2 7，係只有當接收到交訊權賦予資訊而 有被授與現在相互交訊權的情況下，才會將在從側終端12 的設置場所以攝影機1 h所拍攝到的映像及以麥克風丨e所收 音到的聲音’對主側終端11，利用通訊介面1 k的機能而加 以發送。從主側終端1 1接收到交訊權失效資訊後，由於喪 失相互交訊權，因此停止向主側終端11發送自己的映像及 聲音。在被授與相互交訊權以前的期間，都不會發送出自 己的映像及聲音。 槪說構成本實施形態之視訊通話系統的終端1，在視 訊講義或視訊會議中所執行之處理的程序。如圖1 1所示， 主側終端1 1係將從擁有相互交訊權之從側終端1 2所發送過 來的映像及聲音加以接收（步驟S 1 )，將接收到的映像及 聲音，透過顯示器li及揚聲器If而予以輸出（步驟S2)。 同時，將以攝影機1 h所拍攝到的自己的映像及以麥克風1e 所收音到的自己的聲音，向參加視訊講義或視訊會議的所 有從側終端12進行發送（步驟S3 )。在步驟S3中’對不具 有相互交訊權的從側終端1 2，將自己的聲音’重疊上從擁 有相互交訊權之從側終端1 2所接收到的聲音’然後加以送 -22- 201112755 出。 主側終端1 1，係當接收到從任一從側終端1 2所獲取之 交訊權要求資訊時（步驟S4 )，將用來報知有該當從側終 端12之使用者正在要求相互交訊權之意旨的資訊，顯示在 顯示器li的畫面（步驟S5 )。 又’主側終端1 1，係當受理了，由該當主側終端丨丨的 使用者指定授與相互交訊權之從側終端1 2的操作輸入時（ 步驟S6 )，就向已被指定之從側終端1 2，發送交訊權賦予 資訊（步驟S7)。同時，向至此爲止擁有相互交訊權的從 側終端1 2，發送交訊權失效資訊（步驟s 8 )。 主側終端1 1，係反覆進行上記步驟S 1至S 8，直到視訊 講義或視訊會議結束爲止（步驟S 9 )。 如圖1 2所不’從側終％ 1 2係將從主側終端1 1所發送過 來的映像及聲音加以接收（步驟S 1 0 )，將接收到的映像 及聲音，透過顯示器li及揚聲器If而予以輸出（步驟S11) 〇 從側終端1 2，係當受理了，由該當主側終端丨2的使用 者指示要求相互交訊權之意旨的操作輸入時（步，驟S12) ，就向主側終端1 1發送交訊權要求資訊（步驟S 1 3 )。 然後，從側終端1 2係被授與相互交訊權（步驟s丨4 ) ，換言之，以從主側終端1 1接收了交訊權賦予資訊爲條件 ，將以攝影機1 h所拍攝到的自己的映像及以麥克m丨em收 音到的自己的聲音，向主側終端1 1進行發送（步@ S〗5 ) 。自己的映像及聲音之送出，係直到所被授與的相互交訊 I. -23- 201112755 權收效，亦即從主側終端11接收到交訊權失效資訊爲止以 前，都會持續進行。 從側終端1 2，係反覆進行上記步驟s 1 0至S 1 5，直到視 訊講義或視訊會議結束爲止（步驟S16) » 此外，本發明係不限定於以上詳述的實施形態。首先 ，在上記實施形態中雖然是設計成，在複數從側終端當中 只有被授與了現在相互交訊權之終端才能發送聲音，但關 於聲音係亦可設計成無論相互交訊權之有無，皆可在各終 端間任意收送訊。這是因爲，聲音資料的位元速率是遠小 於映像資料，即使從參加講義或會議之所有終端往其他所 有終端發送，也未必會導致通訊頻寬不足。 又，在上記實施形態中，雖然相互交訊權是只授與給 一個從側終端，但亦可將相互交訊權同時授與給複數從側 終端。此情況下，從已被授與相互交訊權的複數從側終端 往主側終端會發送自己的映像（及聲音），在接收到其的 主側終端上就會同時輸出來自複數從側終端的映像（及聲 音）。 主側終端亦可複數設置。此情況下，從擁有相互交訊 權的從側終端會往各主側終端會發送自己的映像（及聲音 )。主側終端彼此也會允許彼此收送自己的映像（及聲音 )° 甚至’在上記實施形態中，雖然在終端間將映像、聲 音、交訊權賦予資訊或其他資訊以點對點的形式加以收送 訊’但亦可將它們經由MCU或中繼伺服器等之中繼機來加 •24- 201112755 以收送訊。 其他各部具體構成或處理的程序等，係在不脫離本發 明之要旨的範圍內，可做各種變形。 [產業上利用之可能性] 本發明係可利用來作爲在多地點間實現視訊講義或視 訊會議的系統。 【圖式簡單說明】 [圖1 ]本發明之一實施形態的視訊通話系統之槪要的圖 示。 [圖2]同實施形態中的終端所具備的硬體資源的圖示。 [圖3 ]同終端的機能區塊圖。 [圖4]同終端的機能區塊圖。 [圖5]電話簿記憶部中所記憶累積之資訊的例示圖。 [圖6]終端上的畫面顯示例之圖示。 [圖7]終端上的畫面顯示例之圖示。 [圖8 ]終端上的畫面顯示例之圖示。 [圖9]終端上的畫面顯示例之圖示。 [圖10]終端上的畫面顯示例之圖示。 [圖1 1 ]終端依照程式所執行之處理的程序的流程圖。 [圖12]終端依照程式所執行之處理的程序的流程圖。 【主要元件符號說明】 -25- 201112755 1 :終端 la :處理器 1 b :主記憶體 1 c :輔助記憶裝置 1 d :操作輸入裝置 1 e :麥克風201112755 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a system for realizing a video call function that allows three or more participants. [Prior Art] A video call system for realizing a video presentation or a video conference between a plurality of places via the Internet or other communication lines is known (for example, refer to the following non-patent literature). In the existing system, the compression ratio of the image data is increased, and/or the size or resolution of the image frame is reduced to prevent the bandwidth of the communication line from reaching the bottleneck. However, the text of the blackboard or the document that causes the whiteboard cannot be read, the details of the model or the physical object cannot be clearly seen, and the like, which is detrimental to the meaning of the video lecture or the video conference. Although it is expected that the quality of the images exchanged will be equal to everyone, if a high-quality image is transmitted to more than three people, the communication bandwidth will be insufficient on the spot. Once the communication bandwidth is insufficient, image deletion or sound interruption will occur, and handouts or meetings on important topics may be difficult. In order to avoid this, it is effective to use a non-Best effort type line that can guarantee a sufficiently large communication speed or to set an MCU (Multi-point Control Unit) between each participant (location). However, in any case, huge investments cannot be avoided. Although IP (Internet Protocol) multicast technology is also considered, in the current situation, multicasting on public lines such as the Internet -5-201112755 communication is generally not allowed. [Prior Art Document] [Non-Patent Document] [Non-Patent Document 1] "XVD CamCast(R)CX", [online], [Search on July 14, 2009], Internet < URL http://www. Marubeni-sys·com/bs/xvci/cx·html > [Summary of the Invention] [Problems to be Solved by the Invention] In view of the above problems, an object of the present invention is to provide video lectures or presence in participants of three or more participants. In videoconferencing, etc., high-quality exchange images can be realized with relatively inexpensive investments. [Means for Solving the Problem] In the present invention, a video call system is constructed, which is a video call function that realizes the transmission and reception of the image through the electrical communication line between the master terminal and the plurality of slave terminals. The system used is characterized in that the main-side terminal is provided with a communication right designation accepting unit that accepts an operation input, and is used to designate a slave terminal from which a mutual communication right is to be granted from among a plurality of slave terminals. And the information and communication department is given to the information and communication department to send information for the purpose of granting mutual communication rights to the slave terminal designated as the right to communicate and mutual communication. And the call receiving department, which will receive the image obtained from the slave terminal that has the current mutual communication right, and the call output control unit, which will be handed over from now to 6 - 201112755 The image received by the slave terminal of the right is displayed on the screen of the display; and the call communication section is a image captured by the camera in the installation place of the master terminal, and the plurality of slave terminals Each of the slave terminals includes: a call receiving unit that receives images received from the master terminal; and a call output control unit that receives images from the master terminal. Displayed on the display screen; and the right to communicate to the information receiving department 'receives the right to receive the information from the main terminal'; and the call and communication department only receives the right of communication When the information is given to the current mutual communication right, the image captured by the camera at the installation location of the slave terminal is transmitted to the master terminal. In video lectures or videoconferencing, in reality, not all participants need an image of all other participants. Regardless of the lecture or the meeting, it is usually not considered that all participants are equal. In the lecture, it is usually the lecturer or the speaker, usually the speaker or the moderator in the meeting, who has the mastership. Also, there are almost no cases where most people speak at the same time. The present invention is designed in such a manner that the image of the master side terminal that masters the master control is constantly assigned to all the slave terminals, and the image of the slave terminal is transmitted only. To the primary side terminal, and only the slave side terminal that now has mutual communication rights, the primary side terminal is sent an image. According to the present invention, it is possible to have three or more systems that can participate at the same time, and the system capable of transmitting images to each other is limited to only a part, so that even if the image to be exchanged is of high quality, the communication bandwidth can be reduced. possibility. And 'you don't have to use a dedicated line or M C U, or IP multicast, you can use the system to compare the cheap investment of 201112755. The call communication unit of the slave terminal is only used to receive the voice of the slave terminal when the right of the right to the right is received, and the microphone is used to receive the voice. The voice that collects the sound of the scene 'including the recording' is transmitted to the primary terminal; the call receiving section of the primary terminal is the voice that will be acquired from the secondary terminal that has the current mutual communication right. Received; the call output control unit of the main terminal will record the sound received from the slave terminal that has the current mutual communication right, and output the sound from the speaker; The voice will be received by the microphone in the setting place of the main terminal, and the plurality of slave terminals will be transmitted 'and' will be received from the slave terminal that has the current mutual communication right. The voice 'sends to the slave terminal that has not given the right to communicate with each other; the call receiver of the slave terminal is the voice that will be acquired from the master terminal. Receiving; referred to from the call before the output side terminal of the control unit, from the host-side terminal based on the received sound, a sound output from the speaker. In the case of such a system, only the sound of the main terminal and the sound of the slave terminal having mutual communication rights are distributed to the participants. In this way, the consumption of the communication bandwidth can be further reduced. Not only that, but also the controller's voice can be appropriately controlled, and it can be an orderly lecture operation and conference operation. If you understand one thing, it is to block the whispering or personal attack, etc. The communication right designation acceptance department of the front-end terminal is acceptable, and you want to rely on the slave terminal that grants the mutual communication right every predetermined time. The order is switched -8 - the designation of the intention of 201112755; the communication right of the pre-recorded main terminal is given to the information and communication department, and the slave terminal that has to grant the mutual communication right at every predetermined time is processed. In the case of designation of the purpose of switching, the slave terminal that transmits the right to transmit information is sequentially switched. In the case of such a system, from the perspective of the user of the main terminal, for example, the image (or even the sound) of the user of the slave terminal is automatically switched every tens of seconds or even every few minutes. Therefore, it is easy to grasp the movement of the user of all the slave terminals. The slave terminal system further includes: a communication right request accepting unit that accepts an operation input for requesting mutual communication rights; and a communication right request information. The Ministry of Communications, when the operation input for the purpose of requesting mutual communication is accepted, the information for the purpose of requesting mutual communication is sent to the primary terminal, that is, the communication request information; The terminal system also has: the communication right request information receiving department, which receives the communication right request information that has never been obtained from the slave terminal of the current mutual communication right, and receives the communication right request output control department. The slave will receive the information on the request for communication rights from the slave terminal and display it on the display screen. In the case of such a system, the user of the slave terminal can request the user of the primary terminal to communicate with each other as needed. Further, the user of the primary terminal can select the object to be given the right of mutual communication by referring to the petition of the user of the secondary terminal. If the preamble main-side terminal also functions as a pre-recorded slave terminal, the main-side terminal and the slave-side terminal can be common, and the manufacturing cost of the terminal can be reduced. -9 - 201112755 [Invention Effect] According to the present invention, there are three In the video lectures or video conferences where the above participants are present, it is possible to achieve high quality of the exchange image with relatively inexpensive investment. [Embodiment] An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the video call system of the present embodiment is configured as a shelf, and the terminal 1 distributed in various places is transmitted through an electronic network such as an Internet or a WAN (Wide Area Network) 'LAN (Local Area Network). Lines 2 are connected to each other to communicate with each other. At least one of these terminals 1 becomes the primary side terminal 1 1, and the remaining plural number becomes the secondary side terminal 12. As shown in FIG. 2, the terminal 1 includes a processor 1 a, a main memory 1 b, an auxiliary memory device 1c, an operation input device Id, a microphone le, a speaker If, an audio codec lg, a camera lh, a display li, and a video. The hardware resources such as the codec lj and the communication interface 1 k are controlled by the controller (system controller, I/O controller, etc.) 11 and cooperate. The auxiliary memory device 1 c is a hard disk drive, a flash memory, an optical disk drive, or the like. The operation input device Id is a pointer device such as a push button that can be operated by a finger, a touch panel, a track pad, etc., but in the present embodiment, it is assumed to be a remote controller that can wirelessly communicate with the terminal 1. The audio codec lg encodes the sound received by the microphone le or decodes the encoded sound information from the speaker If -10- 201112755. The video codec lj encodes the image captured by the camera lh, or decodes the encoded image information and displays it on the screen of the display li. The audio codec lg and the video codec lj may be implemented not by hardware but by software. The communication interface 1 g is used for information communication through the electrical communication line 2, and is represented by a NIC (Network Interface Card) or a wireless LAN transceiver, but a USB (Universal Serial Bus) can also be used. , IEEE 1 394 and other interfaces. The terminal 1 is basically a dedicated machine that is manufactured for the purpose of constructing the system. However, it is also possible to install a necessary program for a general-purpose personal computer, a workstation, a video game machine, etc., to constitute the terminal 10 of the present invention. The program to be executed by the processor 1a is stored in the auxiliary memory device 1. In c, when the program is executed, it is read from the auxiliary memory device yc to the main memory 1b, and is interpreted by the processor 1a. The terminal 1 drives the hard disk resource in accordance with the program, and functions as the master side terminal 1 1 shown in Fig. 3 and the slave side terminal 12 shown in Fig. 4. The main terminal 1 1 includes a phone book storage unit 1 1 1 , a call request transmitting unit 1 1 2, a call receiving unit 1 1 3, a call output control unit 丨丨4, a call transmitting unit 115, and a call. The information request information receiving unit 116, the communication right request output control unit 1 17, the communication right designation accepting unit 1 1 8 , and the communication right information transmitting unit 1 19 . The telephone bookkeeping unit 1 1 1 1 is the identification information of the terminal 1 of one or plural (for example, a maximum of 1 piece) and the attribute information about the terminal 1 using the main 1. -11 - 201112755 The memory 1 b or the memory area of the auxiliary memory device 1 c is memorized. The identification information is, for example, an IP address, a SIP (Session Initiation Protocol) address, and other URIs for identifying information for communication objects. The attribute information is the name, the affiliation, the location, or other information about the other party, and is the string information in the present embodiment. In Fig. 5, the information stored in the phone book storage unit 1 1 1 is exemplified. The phone book storage unit 1 11 associates the identification information and the attribute information with the ID number and the like for each terminal 1 that can be used as a candidate for the video call partner. If the identification information and attribute information of the other terminal 1 are directly input manually, they are also transmitted from other terminals 1 or computers connected through the electrical communication line 2. The terminal 1 receives the identification information and the attribute information of the other terminal 1 through the operation input device 1d, or receives the function of the communication interface lk, and registers it in the phone book (or the address book). It is also recorded in the phone book storage unit 1 1 1 . The related identification information and attribute information of other terminals 1 that have conducted video calls in the past can also be accumulated in the phone book as past call history. In this case, as the attribute information, it is information indicating whether there is a call (outgoing) from the other party or an incoming call (incoming call) from the other party, or a time stamp indicating the date of the video call with the terminal 1. , a memory. In particular, as shown in FIG. 5, regarding the plurality of terminals 1 that have participated in the video lectures or video conferences held in the past, the information of the intention and the time stamp indicating the date of the lecture or the date of the conference can be recorded. -12- 201112755 Call requesting department 1 1 2, when holding video lectures or video conferences, etc., use the communication interface to make the call request for video call between terminals 1 participating in the lecture or conference. 1 k of function is sent. At the beginning of the video lecture or video conference, etc., the main terminal 1 1 and each of the slave terminals 1 2 must each establish a talk (s e s s i 〇 η ). In principle, the call request is sent from the primary side terminal 1 1 to the secondary side terminal 1 2 . However, it is also possible to transmit a call request from the slave terminal 1 2 to the master terminal 1 1 . The main terminal 1 1 is displayed on the screen of the display li, which is a candidate for the video call partner, that is, a list of other terminals 1 that may be candidates for the lecture or conference. Fig. 6 is a diagram showing an example of list display of candidates. Originally displayed as a candidate, there has been a terminal 1 that has participated in a lecture or conference (and whose history information is left in the phone book storage unit 1 1 1). The main terminal 1 1 reads the identification information from the phone book storage unit 1 1 1 for each of the plural terminals 1 that are candidates. Then, based on the identification information, the terminal 1 transmits the information for requesting the small pictogram of the scene (symbol B in the figure), that is, the on-site small icon request. The live small icon ' is an instant image or still image captured at the setting field of the terminal 1. The size of the small icon on the site (for example, 1 9 2 X 1 0 8 pixels) is smaller than the size of the image exchanged during video presentations or video conferences (for example, 1 9 2 0 X 1 〇 80 pixels). The frame rate of the small map on the spot is affected by the bandwidth of the electrical communication line 2 to which each terminal 1 is connected, but is about 5 fps or more. In the system of the present embodiment, the terminals 1 are in principle connected to each other through the electric communication line 2 in a point-to-point manner. That is, 'in the implementation of video lectures or video conferences', it is not necessary to use other relay servers -13-201112755 or MCU relays. If the identification information is an IP address such as information that does not require address resolution, the identification information can be used to immediately transmit the field thumbnail icon to the terminal 1. If the identification information is an address resolution such as a SIP address, the identification information is used to send an invitation message to another computer (for example, a SIP proxy server), and then a talk is established with the called terminal 1 2 . Only the small pictogram requirements are sent afterwards. Alternatively, the identification information is sent to another computer having an address resolution capability (for example, a DNS (Domain Name System) server), and then the IP address corresponding to the identification information is received from the computer, and the IP bit is used. The site or the like sends a small pictogram request to the terminal 1. The terminal 1 that has received the request for the on-site thumbnail is normally transmitted to the terminal 1 that has acquired the request for the small icon on the spot, using the small map captured by the camera 1 h. In the main-side terminal 1 1, the live small icon sent back from each terminal 1 is received, and displayed on the screen of the display 连同 together with the attribute information (symbol A in the figure) of the terminal. As for the terminal 1 that cannot receive the small icon on the spot, the image or string indicating the intention is displayed because the field small icon cannot be displayed. In the example shown in Figure 6, "in the connection. . . The display (symbol c in the figure) indicates that the terminal 1 is required to send a small pictogram request, and is waiting for a response. The display of "Unable to Communicate" (symbol D in the figure) indicates that no response has been sent back after a certain time has elapsed after the terminal 1 has sent a small on-site request, that is, for some reason (the power of terminal 1 is cut. The disconnection, the communication line to which the terminal 1 is connected, and the like cause an inability to establish a talk with the terminal 1. The display of "Unable to display" (symbol E in the figure) indicates that although the site small graphic request was sent to the terminal 1-14-201112755, the small icon on the site was rejected. In other words, the small graphic transmission was not performed. The response was intended to be sent as an alternative to the live small icon. The "in-call" display (symbol F in the figure) indicates that although the site 1 has been sent a small icon request to the terminal 1, the response has been made in the video call with the other terminal 1, as a small icon on site. The alternative was sent over. Then, the 'main side terminal 1' is used to specify the operation input of the plurality of slave terminals 1 2 to be the participants of the video presentation or the video conference from among the candidates displayed on the screen, through the operation input device 1 d On the other hand, the user who receives the main-side terminal 1 moves the cursor (symbol G in the figure) by operating the input device 1d, and clicks on the information display column of the slave terminal 1 2 (symbols A and B in the figure). ). The main terminal 1 that has received the operation recognizes the terminal 1 corresponding to the clicked display column as a participant, and transmits the request for the video call to the terminal 1 based on the identification information associated with the stomach terminal 1. The call requirements at the beginning. Even if the relevant identification information of the slave side terminal 12 requires address resolution, if the talk or address resolution has been completed in the signal transmission phase required by the live small icon, it can directly go to the slave terminal 1 2 Send a call request. If this is not the case, the talk establishment or address resolution is performed in the same manner as when the live small icon requests the transmission, and then the call request is sent to the slave terminal 12. By the way, the terminal 1 which is 7K "unable to communicate" or "in-call" is replaced by the small icon on the spot, and cannot be designated as a participant (the cursor cannot be moved to the related information display column of the terminal 1) . The call reception unit 1 1 3 ' is caused by the transmission of the call request. 1: • 15 - 201112755 The image and sound transmitted from the slave terminal I 2 are received by the function of the communication interface i k . However, the transmission of the image and the sound to the main terminal 1 is limited to the slave terminal i 2 having the current mutual communication right, and the call receiving unit 1 13 receives only the slave terminal 丨2. And the image and sound of the radio. The call output control unit 1 1 4 displays the image of the call received from the slave terminal 1 2 on the screen of the display li, and the voice during the call received from the slave terminal 1 2 , the sound is output from the speaker i丨. Fig. 7 shows an example of display output of the image of the other party in the video call of the master side terminal 11. In the call screen, the image (the symbol η in the figure) captured by the slave terminal 12 having the current mutual communication right is reflected on the large screen. In addition, the call output control unit 1 14 is placed on the same call screen, and displays its own image (symbol I in the figure) captured by the camera 1 h at the installation location of the main terminal Π in a small area. . The call originating unit 1 1 5 'will capture all the slaves of the video presentation or video conference with the image captured by the camera 1 h and the sound received by the microphone 1 e at the installation location of the main terminal 1 i. The terminal 12 is transmitted by the function of the communication interface 1 k. Further, in the present embodiment, the voice of the slave terminal 1 2 having the current mutual communication right is transmitted and shared to the terminal 1 of all the participants through the master terminal 1 1 . Thereby, the call originating unit 1 15 transmits the voice of the self received by the setting terminal of the main terminal 1 1 to all the slave terminals 1 2 that do not have mutual communication rights, and also The voice received by the slave terminal 1 2 having the mutual communication right is transmitted. At this time, the call originating unit 1 15 is for receiving the sound of the microphone 1 e to -16-201112755, superimposing the received sound, and transmitting the obtained sound data. The right to request the information receiving department 1 16 is the information required to request the mutual communication right from the slave terminal 12, that is, the communication request information, using the function of the communication interface 1 k And receive it. Further, the information requesting department receives the information, and the information obtained from the slave terminal 12 for canceling the request for mutual communication rights cancels the information. The communication right request output control unit 117 receives the communication right request information from which slave terminal 12, and displays it on the screen of the display. Fig. 8 is a diagram showing an example of display of a communication right request. On the control screen, attribute information (symbol J in the figure) and its current status are displayed in a list of all the slave terminals 1 2 participating in the video lecture or video conference. In the example shown in FIG. 8, the display of "in communication" (stiffness symbol K) indicates that a good conversation is established with the slave terminal 12, and the slave slave terminal 12 can receive the slave terminal 1 1 The image and sound sent. Then, the display of the "speech request" (the symbol L in the figure) indicates that the communication right request information is received from the slave terminal 丨2. When the cancellation information is received from the slave terminal 12 that has obtained the communication right request information and received, the display of the "speech request" is changed back to the "communication" display. Incidentally, the display of "cut off" (symbol Μ in the figure) indicates that the talk with the slave terminal 丨2 is cut off for some reason. The control screen is displayed in the video or video conference, and the user of the primary terminal Η is displayed when the predetermined operation is performed by operating the input device Id. The reason why the control screen is not normally displayed is _, and the viewer does not hinder the user of the main terminal 117, 2011-11755, especially the spirit set φ of the lecturer or the presenter. When the "return" button (symbol S in the figure) is clicked by the user's hand of the main terminal 1 1 , the control screen shown in FIG. 8 is hidden, and the original call shown in FIG. 7 is returned. Picture. Further, in the control screen shown in Fig. 8, the display of the "communication" or the display of "cut" may be replaced by the display of the above-mentioned scene thumbnail. In this case, the main-side terminal 1 1 that has received the predetermined operation for displaying the control screen is a small-picture request for each of the slave-side terminals 1 2, and the slave-side terminal 1 2 system that receives the request for the on-site small icon is received. The small image of the scene is taken and then sent back to the main terminal 11. Then, the master side terminal 1 1 displays the received field small icon in the controller screen. Further, when the main terminal 1 1 receives a click operation of the "return" button, which is an operation required to hide the control screen, the main terminal 1 1 transmits a message for requesting a small pictogram to the slave terminal 1 2 . Information about the purpose of stopping. The slave terminal 1 2 that has received the camera stops the shooting and sending of the small image on the spot. In the period in which the call screen shown in Fig. 7 is displayed, when the communication right request information is received, the intention (the symbol Ν in the figure) is displayed in a small area at the corner. The display of the intention to receive the right of communication request is cancelled when the cancellation information is received from the same slave terminal 1 2 . The communication right designation accepting unit 182 receives an operation input for designating the slave terminal 1 to which the mutual communication right is to be given from among the plurality of slave terminals ,2, and accepts the operation input device 1d. The user of the main terminal 丨 moves the cursor (symbol 图 in the figure) by operating the input device 1 d on the control screen shown in FIG. 8 and clicks in the field of the slave terminal 丨 2 -18- 201112755 The "Select" button (symbol p in the figure) is displayed. The master terminal 1 1 that has accepted the operation recognizes the slave terminal 1 2 ' corresponding to the clicked button as the terminal 12 to which the mutual right of communication is granted. However, regarding the slave terminal 1 2 which has been granted mutual communication right, instead of the "select" button, the image or string (symbol Q in the figure) for indicating the purpose is displayed instead. Further, the communication right designation accepting unit 118 is acceptable, and it is intended to designate the slave terminal 1 2 that grants the mutual communication right in order at regular intervals. On the screen shown in Fig. 8, a button (symbol R in the figure) for automatically switching the object for granting mutual communication rights is displayed. These buttons are used to let people choose the time of the switching cycle. In the example shown, it is possible to select from "10 seconds", "30 seconds", "1 point" and "3 points". The user of the main terminal 1 is operated by the operation input device 1 d on the control screen shown in Fig. 8, and the cursor is moved, and the button of the desired cycle time is clicked. The main terminal 1 1 that has accepted the operation knows that the designation of switching the slave terminal 丨2 to which the mutual communication right is to be performed is performed in the time period corresponding to the button to be clicked. The information-granting department 119' assigns information to the information on the purpose of granting mutual communication rights to the slave terminal 12 that is designated as the right to communicate with each other. It is sent using the function of the communication interface. The communication right is given to the information transmitting department, and the slave terminal 1 2 designated by the user of the primary terminal ii is sent the right to give the right to transmit the right, and at the same time, the slave side has the right to communicate with each other. The terminal 丨 2 transmits the communication right failure information for the purpose of losing the mutual communication right. S. -19 - 201112755 By the user of the master side terminal 1 1 , when the slave terminal 1 2 that is to grant the mutual communication right is to be sequentially designated at the specified time, the user is instructed to use it. The time period selected by the user sends the communication right failure information to the slave terminal 12 having the current mutual communication right, and sends the communication to the slave terminal 1 2 that has no mutual communication right in the next position. The right to give information. The slave side terminal 12 is provided with a call request receiving unit 211, a call receiving unit 122, a call output control unit 123, a communication right request receiving unit 124, a communication right request information transmitting unit 125, and a handover. The information is given to the information receiving unit 126 and the call transmitting unit 127. The call request receiving unit 121 receives the call request transmitted from the primary terminal 1 1 that is the target of the video call by the function of the communication interface 1 k. The fact that the slave terminal 1 2 communicates with the master side terminal 1 1 and the slave side terminal 12 2 participates in the video lecture or video conference held by the master side terminal 11 is determined by the call request for the call. . The call receiving unit 1 22 receives the image and sound transmitted from the main terminal 1 1 by the function of the communication interface 1 k. The image received by the call receiving unit 1 2 2 is the image captured by the main terminal 1 1 . On the other hand, the voice received by the call receiving unit 1 22 is that when the slave terminal 12 has the current mutual right of communication, only the voice received by the master terminal 1 1 is received, but when there is no present The mutual communication right is the sound received by the primary terminal 11 and the sound received by the secondary terminal 12 having the mutual communication right. The call output control unit 1 23 displays the image of the -20-201112755 call received from the main-side terminal 1 1 on the screen of the display li, and simultaneously receives the call received from the main-side terminal 1 1 . The sound in the sound is output from the speaker. Fig. 9 is a diagram showing an example of display output of the image of the other party in the video call from the side terminal 〖2. In the call screen, the image (the symbol T in the figure) captured by the main terminal is reflected on the large screen. In addition, the call output control unit 1 2 3 is in the same call screen, and the image (the symbol u in the figure) captured by the camera 1 h at the installation location of the slave terminal 2 is a small area. Show it. The communication right request accepting unit 1 2 4 accepts an operation input for the user of the main terminal 1 1 to request mutual communication rights, and accepts the operation input device 1 d. A "hairpin request" button (symbol V in the figure) is displayed on the call screen in the slave terminal 1 2 . The user of the slave terminal 1 2 that requests the assignment of the mutual communication right operates the operation input device Id to move the cursor (not shown) on the screen shown in Fig. 9, and clicks the "speak request" button. The slave terminal 1 2 that has accepted the operation knows that there is an intention to request mutual communication. The right to request the information transmission unit 125, when accepting the operation input for the purpose of requesting the mutual communication right, transmits the information of the communication right request to the main terminal 1 1 by using the function of the communication interface 1k. . After the communication request information is transmitted, in the call screen of the slave terminal 12, as shown in FIG. 10, an image or a character string (symbol W in the figure) indicating the intention is displayed, and The "Request" button changes to display the "Request abort" button (symbol X in the figure). When the "request to suspend" button is clicked by the user's hand of the slave terminal 1 2, the main terminal 1 1 sends a cancellation message to the -21, 2011, 755, and the "send request" is displayed, and the request is made. The "Stop" button changes back to the "Speak Request" button. The right of communication is given to the information receiving unit 1 26, and the information given to the information from the primary terminal terminal is received by the function of the communication interface Ik. Further, the communication right is given to the information receiving unit 126, and the communication right failure information acquired from the main terminal 11 is also received. The call originating unit 1 2 7 will only be photographed by the camera 1 h at the setting place of the slave terminal 12 if the communication right information is received and the current mutual right is granted. The image and the sound received by the microphone 丨e are transmitted to the main terminal 11 by the function of the communication interface 1 k. After receiving the communication right failure information from the primary side terminal 11, the mutual transmission of the right to the right is lost, so that the transmission of the own image and sound to the primary terminal 11 is stopped. No image or sound will be sent until the time of mutual communication. The program constituting the terminal 1 of the video call system of the present embodiment, which is executed in the video lecture or video conference. As shown in FIG. 11, the main terminal 11 receives the image and sound transmitted from the slave terminal 12 having the mutual communication right (step S1), and transmits the received image and sound. The display li and the speaker If are output (step S2). At the same time, the own image captured by the camera 1 h and the own voice received by the microphone 1e are transmitted to all the slave terminals 12 participating in the video lecture or video conference (step S3). In step S3, 'the slave side terminal 1 2 that does not have mutual communication rights' is superimposed on the sound received from the slave side terminal 12 having the mutual communication right' and then sent to -22- 201112755. The primary side terminal 1 1 is configured to notify that the user of the slave terminal 12 is requesting mutual communication when receiving the communication right request information acquired from any of the slave terminals 12 (step S4). The information intended for the right is displayed on the screen of the display li (step S5). Further, when the main terminal 1 1 is accepted, when the user of the primary terminal 指定 designates the operation input of the slave terminal 1 2 that grants the mutual communication right (step S6), the direction has been designated. The slave terminal 1 2 transmits the rights grant information (step S7). At the same time, the slave right terminal 12 having the mutual right of communication has been sent the transmission right failure information (step s 8). The main-side terminal 1 1 repeats the above-described steps S 1 to S 8 until the video presentation or the video conference ends (step S 9 ). As shown in Fig. 12, the image and sound transmitted from the main terminal 1 1 are received (step S 1 0 ), and the received image and sound are transmitted through the display li and the speaker. If it is output (step S11), the slave terminal 1 2 is accepted, and when the user of the master terminal 丨2 instructs the operation input requesting the mutual communication right (step S12), The communication right request information is transmitted to the primary side terminal 1 1 (step S 13 3 ). Then, the slave terminal 1 2 is granted mutual communication rights (step s丨4), in other words, on the condition that the communication right assignment information is received from the master side terminal 11, the camera 1h is captured. The own image and its own voice picked up by Mike m丨em are sent to the main terminal 1 1 (step @S〗 5). The transmission of your own image and sound is until the mutual communication granted. -23- 201112755 The right to the effect, that is, the information on the failure of the communication right from the main terminal 11 will continue. The slave terminal 1 2 repeats the above-described steps s 1 0 to S 1 5 until the video presentation or the video conference ends (step S16). Further, the present invention is not limited to the embodiments described above. First, in the above embodiment, it is designed such that only the terminals that have been granted the mutual communication right can transmit sound among the plurality of slave terminals, but the sound system can also be designed to have the right to communicate with each other. All can be received and sent between the terminals. This is because the bit rate of the sound material is much smaller than that of the image data, and even if it is sent from all terminals participating in the lecture or conference to all other terminals, the communication bandwidth may not be insufficient. Further, in the above embodiment, although the mutual communication right is granted only to one slave terminal, the mutual communication right can be simultaneously granted to the plurality of slave terminals. In this case, the self-image (and sound) is transmitted from the plurality of slave terminals that have been granted mutual communication rights to the master terminal, and the slave slave terminals are simultaneously outputted on the master terminal receiving the same. Image (and sound). The main terminal can also be set in multiples. In this case, the slave-side terminal with mutual communication rights will send its own image (and sound) to each of the master terminals. The primary terminals also allow each other to receive their own images (and sounds) ° even in the above embodiment, although the images, sounds, communication rights, or other information are transmitted in a peer-to-peer manner between the terminals. Newsletter 'but they can also be sent to the relay via the relay machine such as MCU or relay server. Other modifications and/or procedures may be made without departing from the spirit and scope of the invention. [Possibility of Industrial Utilization] The present invention can be utilized as a system for realizing video lectures or video conferences between multiple locations. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] A schematic diagram of a video communication system according to an embodiment of the present invention. Fig. 2 is a view showing a hardware resource included in a terminal in the same embodiment. [Fig. 3] Functional block diagram of the same terminal. [Fig. 4] A functional block diagram of the same terminal. [Fig. 5] An illustration of information accumulated in the phone book storage unit. [Fig. 6] An illustration of a screen display example on the terminal. [Fig. 7] An illustration of a screen display example on the terminal. [Fig. 8] An illustration of a screen display example on the terminal. [Fig. 9] An illustration of a screen display example on the terminal. [Fig. 10] An illustration of a screen display example on the terminal. [Fig. 1 1] A flowchart of a program in which the terminal performs processing according to the program. [Fig. 12] A flowchart of a procedure of processing by the terminal in accordance with the program. [Main component symbol description] -25- 201112755 1 : Terminal la : Processor 1 b : Main memory 1 c : Auxiliary memory device 1 d : Operation input device 1 e : Microphone
If :揚聲器 lg :音訊編解碼器 1 h :攝影機 1 i :顯示器 lj :視訊編解碼器 1 k :通訊介面 11 :控制器 2 :電氣通訊線路 1 1 :主側終端 1 1 1 :電話簿記憶部 1 1 2 :通話要求發訊部 1 1 3 :通話收訊部 1 1 4 :通話輸出控制部 1 1 5 :通話發訊部 116:交訊權要求資訊收訊部 117:交訊權要求輸出控制部 1 1 8 :交訊權指定受理部 1 1 9 :交訊權賦予資訊發訊部 -26 201112755 1 2 :從側終端 1 2 1 :通話要求收訊部 122 :通話收訊部 123 :通話輸出控制部 124 :交訊權要求受理部 125:交訊權要求資訊發訊部 126 :交訊權賦予資訊收訊部 1 2 7 :通話發訊部 -27-If : Speaker lg : Audio codec 1 h : Camera 1 i : Display lj : Video codec 1 k : Communication interface 11 : Controller 2 : Electrical communication line 1 1 : Main side terminal 1 1 1 : Phone book memory Department 1 1 2 : Call requesting and transmitting unit 1 1 3 : Calling and receiving unit 1 1 4 : Call output control unit 1 1 5 : Calling and transmitting unit 116: Communication right request information receiving unit 117: Communication right request Output control unit 1 1 8 : Communication right designation acceptance unit 1 1 9 : Communication right information transmission unit -26 201112755 1 2 : Slave terminal 1 2 1 : Call request reception unit 122 : Call reception unit 123 : call output control unit 124: communication right request accepting unit 125: communication right request information transmitting unit 126: communication right information receiving unit 1 2 7 : call transmitting unit -27-