201210321 六、發明說明： 【發明所屬之技術領域】 本發明是有關於-種影音系統，且特別是有關於一種 利用網路來傳輸即時影音串流的影音系統。 【先前技術】 圖1繪一習知之有線電視系統的方塊圖。在習知的 有線電視系統100 包括了頭端1〇2 ,其會整合各種訊 號源所發出的訊號，包括衛星節目、#者自製節目、廣告、 網路服務等各種訊號。接著，頭端102會將這些訊號調變 為固定的舰訊號’並且將這些親訊號加以合併後放到 主幹線(Tnmk)1〇4上傳送。接著，主幹線刚會將頭端1〇2 所輸出的頻道以遠距離的方式傳輸。f知的主幹線皆是以 直徑較粗㈣㈣齡鋪設，但是同軸賴在遠距傳輸後 的知失較大。因此’為達到最低失真的傳輸效果所以目 前的主幹線104大都使用光纖來實現。 此外，在主幹線 一 ΗΓ心Μ朔逼訊號，會到達一, 配網路1〇6。由於分配贿1〇6已經屬整體網路的後段 所以對訊號的m不似崎線1()4般嚴格。因此， 配網路1G6通常是以-般的同軸電雙加以鋪設即可。而 配網路1G6可以連接至多個用戶端1G8。每—用戶端^ 都包括至少-使用者主機，例如112、114和116 用者主機112、114和116大多是雷相 " 夕疋視。而制者藉由這. 201210321 使用者主機112、114和116，就可以觀賞到由頭端1〇2所 提供的即時影音訊息。 另外’當使用者在使用習知的使用者主機112、114 和116來觀看節目時，若是想要同時得知兩個以上不同頻 道的影音内容時，就需要不斷的切換頻道，非常的不方便。 這是由於在習知的使用者主機112、114和116中，通常只 含有一個解調器(Tuner)，來解調由分配網路1〇6所傳送來 的頻道訊號。由於一個解調器只能夠解調一個頻道訊號， 因此在一些習知的使用者主機112、114和116中，則會配 置兩個以上的解調器，並且允許使用者以子母晝面的方式 來觀看兩個頻道以上的影音内容。然而，這就使得使用者 主機的硬體成本上昇。 【發明内容】 因此，本發明提供一種互動式影音系統，可以讓使用 者利用傳統的使用者主機，就可以觀看多個即時影音訊息。 本發明也提供-種影音播放系統，可以提供使用者多個即 時影音訊息。 本發明更提供一種影音播放方法，可以讓使用者同時 觀看多個即時影音訊息。 本發明提供-種互動式影音系統，包括區域網路、多 個使用者主機、多個即時影音訊息源和播㈣統。區域網 路分別與使用者主機連線，並且_至播放⑽。而播放 系統則耗接即時影音訊息源^其巾，每一即時影音訊息源 201210321 分別提供至少一即時(Live)即時影音訊息至播放系統。播放 系統則將這些即時影音訊息轉換成多個影音串流訊號。另 外，播放系統也會因應使用者主機其中之一透過區域網路 所發出的一請求，而將這些影音串流訊號透過區域網路送 至對應的使用者主機，並且以多個子晝面的形式來同時顯 示這些即時影音訊息。當子晝面其中之一被選擇時，則在 對應的使用者主機上顯示被選擇之子晝面所對應之即時影 音訊息的相關資訊。 、 。在本實施例中，即時影音訊息源包括多個影音祠服 器、多個解調器和/或多個影音播放裝置。 另外，使用者主機則包括電腦裝置和行動裝置。 從另-觀點來看，本發明也提供一種影音播放系統， 可以適用於多個即時影音訊息源與—區域網路上之多 用者主機4發明之f彡音播放纽包括至少— 息源接收端、網路連接端和控制裝置。即時影音訊自^接201210321 VI. Description of the Invention: [Technical Field] The present invention relates to a video system, and more particularly to an audio-visual system that utilizes a network to transmit live video streams. [Prior Art] FIG. 1 depicts a block diagram of a conventional cable television system. The conventional cable television system 100 includes a head end 1〇2 that integrates signals from various sources, including satellite programs, #home-made programs, advertisements, and network services. Then, the headend 102 will modulate these signals into fixed ship signals' and combine these signals to be transmitted on the trunk line (Tnmk) 1〇4. Then, the main line just transmits the channel output from the head end 1〇2 over a long distance. The main lines of the knowing are laid at a relatively large diameter (four) (four), but the coaxial reliance on the long-distance transmission is greater. Therefore, in order to achieve the lowest distortion transmission effect, the current main line 104 is mostly realized by using an optical fiber. In addition, on the main line, the heartbeat will reach one, and the network will be 1〇6. Since the allocation of bribes is already in the latter part of the overall network, the m of the signal is not as strict as the line 1()4. Therefore, the distribution network 1G6 is usually laid with a coaxial coaxial double. The distribution network 1G6 can be connected to multiple clients 1G8. Each of the client terminals includes at least a user host, such as 112, 114, and 116. The user hosts 112, 114, and 116 are mostly Ray Phase " With this 201210321 user host 112, 114 and 116, the system can view the instant video and audio information provided by the head end 1〇2. In addition, when the user uses the conventional user hosts 112, 114 and 116 to watch the program, if the user wants to know the audio and video content of two or more different channels at the same time, it is necessary to continuously switch channels, which is very inconvenient. . This is due to the fact that in the conventional user hosts 112, 114 and 116, there is usually only one demodulator (Tuner) to demodulate the channel signals transmitted by the distribution network 1〇6. Since a demodulator can only demodulate one channel signal, in some conventional user hosts 112, 114 and 116, more than two demodulators are configured and the user is allowed to face the mother and child. Ways to watch audio and video content above two channels. However, this increases the hardware cost of the user's host. SUMMARY OF THE INVENTION Accordingly, the present invention provides an interactive video and audio system that allows a user to view multiple instant video and audio messages using a conventional user host. The present invention also provides an audio-visual playback system that can provide a plurality of instant video and audio messages to a user. The invention further provides a video and audio playing method, which allows a user to simultaneously view a plurality of instant video and audio messages. The invention provides an interactive video and audio system, including a regional network, a plurality of user hosts, a plurality of instant video and audio sources, and a broadcast (four) system. The regional network is connected to the user host and _ to play (10). The playback system consumes instant audio and video information sources, and each instant video source 201210321 provides at least one instant audio and video message to the playback system. The playback system converts these instant video messages into multiple video streams. In addition, the playback system will send the video stream signals to the corresponding user host through the regional network in response to a request sent by one of the user hosts through the local area network, and in multiple sub-frames. To display these instant video messages at the same time. When one of the sub-surfaces is selected, the related information of the instant video message corresponding to the selected sub-surface is displayed on the corresponding user host. , . In this embodiment, the instant video source includes a plurality of video players, a plurality of demodulators, and/or a plurality of video playback devices. In addition, the user host includes a computer device and a mobile device. From another point of view, the present invention also provides an audio-visual playback system, which can be applied to a plurality of instant video source sources and a multi-user host 4 on a regional network. Network connection and control unit. Instant video and audio
St收即時影音，息源所分別提供之多個即㈣訊 〜 ，網料接卿祕路。控 即時影音訊息接收端與網路連接端，以將這些即時 息轉換成多個影音串流訊號。另卜：曰° 用者主舰* 力7卜控職置也會因應使 機其中之-透過區域網路所發出的—請求 些影音串流職透過區_路送至對應的使 = 且以多個子畫面的形式來同時顯，f 示 2面其中之-被選擇時，則在對應*用;： 子擇之子晝面所對應之即時影音訊息的 從另一觀點來看，本發明更提供一種影音播放方法 201210321 包括透過-區域網路與多個使用者主機連線，並且接收多 2時影音訊息。接著，將這些即時影音訊息轉換成多個 〜曰串流訊號。當在區域崎上接收職使用者主機其中 之所發出的-凊求時，則將這些影音串流訊號透過區域 周路送至對應的錢者域，並且以多個子畫面的形式來 =時顯示這些即時影音訊息。此外，當這些子晝面其中之 被選擇時’則在對應的制者主機上顯示被選擇之子晝 面所對應之該即時影音訊息的相關資訊。 " 立在本發明之實施例中，以子畫面來顯示這些即時影 :訊息的步驟，包括在使用者主機所顯示的畫面上，將這 二子旦面以陣列方式排列。在另外的實施例中，則是將多 個較小的子晝面’配置在使时域所顯示之畫面的一 側，而將一較大的子晝面，與上述較小的子晝面並排在使 用者主機所顯示之畫面的另一側。 另外，上述顯示被選擇之子畫面所對應之即時影音訊 f的相關資訊’包括即時影音訊息的音量、頻道、編號、 =目名稱、網路協定位址、國旗、國家或區域的名稱、國 家或區域目前的曰期、國家或區域目前的時間、影音串流 訊號的頻道名稱。 由於本發明是將影音串流訊後透過區域網路傳送至 使用者主機，並且以子晝面的型式來顯示，因此可以允許 使用者不用特殊的使用者主機，即可同時觀看多個即時影 音訊息。 為讓本發明之上述和其他目的、特徵和優點能更明顯 易懂’下文特舉較佳實施例，並配合所附圖式，作詳細說 201210321 明如下。 【實施方式】 圖2繪示為依照本發明之一較佳實施例的一種互動式 影音系統的方塊圖。請參照圖2，本實施例所提供的互動 式影音系統200，包括頭端202、播放系統204、區域網路 206和使用者端208。頭端208具有多個即時影音訊息源， 例如212、214和216，可以與播放系統204連線。另外， 播放系統204則可以透過區域網路206，而與使用者端（或 稱為用戶端)208中的多個使用者主機，例如222、224和 226連線。其中’使用者主機222、224和226包括具有網 路連線功能的電視、電腦裝置和行動裝置。 這些即時影音訊息源212、214和216可以分別提供 至少一即時影音訊息，像是AV卜AV2和AV3給播放系統 204。另外’當播放系統204的在接收這些影音訊息avi、 AV2和AV3同時’還可以擷取這些即時影音訊息AV1、AV2 和AV3的相關資訊，例如對應之即時影音訊息的音量、頻 道、編號、節目名稱、網路協定位址、國旗、國家或區域 的名稱、國家或區域目前的曰期、國家或區域目前的時間、 影音丰流訊號的頻道名稱等。 圖3繪示為依照本發明之一較佳實施例的一種影音播 放系統的方塊圖。請合併參照圖2和圖3，本實施例所提 供的播放系統204，包括至少一即時影音訊息源接收端 302、控制裝置304和網路連接端306。其中，控制裝置 201210321 會透過即時影音訊息源接收端3〇2耦接至即時影音訊息源 212 214和216，以接收即時影音訊息AV卜AV2和AV3。 在一些實施例中，即時影音訊息源接收端3〇2可以是 立網路連接端’而對應的即時影音訊號源則可以是多個影 曰伺服器。因此，影音訊息源接收端可以透過網際網路與 這些影音伺服器連線，以接收即時影音訊息AV1、AV2和 AV3。在這些實施例中，影音伺服器可以提供不同國家或 地區的節目來當作即時影音訊息AV1、AV2和AV3。 另外，即時影音訊息源接收端302還可以是一解調器 接口，因此對應的即時影音訊號源則可以利用多個解調器 來實現。由於一個解調器可以解調一個頻道的訊號，因此 即時影音訊息AV1、AV2和AV3就可以是不同的頻道訊號。 在另外一些實施例中，即時影音訊息源接收端3〇2則 可以利用影音訊號接口來實現，例如是高解析多媒體介面 (HDMI)接口。如此一來，影音訊號源接收端3〇2就可以耦 接像是DVD播放器的影音播放裝置的即時影音訊息源， 並且接收影音播放裝置再生一儲存媒體上的影音訊號當作 即時影音訊息AVI、AV2和AV3。 除此之外，控制裝置306也會透過網路連接端3〇6與 區域網路206連線。當控制裝置3〇4收到即時影音訊息 AVI、AV2和AV3時，會轉換成多個影音串流訊號 AV_STR[1:N]，而N為大於1的整數。 在本實施例中，使用者可以透過使用者主機222、224 和226任一登入播放系統204。例如’使用者可以藉由操 作使用者主機222、224和226任一 ’而透過區域網路206 201210321 連結由播放系統204所提供的一網頁。另外，當使用者在 此網頁輸入身分辨識碼和密碼之後，就可以登入播放系統 204。接著，使用者可以透過使用者主機222、224和226 任一向播放系統204提出觀看即時影音訊息的請求。 當控制裝置304收到從使用者主機222、224和226 任一所發出的請求時，就會回應此請求，而將影音串流訊 號AV_STR[1:N]送至對應的使用者主機。此時，上述即時 影音訊息AV1、AV2和AV3的相關資訊也會送至對應的使 用者主機。當影音串流訊號AV_STR[1:N]被送至對應的使 用者主機時’會在對應之使用者主機所顯示的晝面上，以 多個子畫面的形式來分別顯示即時影音訊息AV1、AV2和 AV3的視訊内容。 圖4A繪示為依照本發明之第一實施例的一種以子晝 面來顯示即時影音訊息的示意圖。在圖4A中，在對應之 使用者主機所顯示的畫面4〇〇上，會利用多個子晝面，如 402、404和406來顯示即時影音訊息AV1、AV2和AV3 的視訊内容。在本實施例中’這些子晝面是以陣列方式排 列。 圖4B和圖4C繪示為依照本發明第二實施例的一種以 子晝面來顯示即時影音訊息的示意圖。請合併參照圖4B 和圖4C，在本實施例中，子晝面包括多個較小的子畫面， 例如414和416，會配置在晝面4〇〇的一側。另外，子畫 面還包括較大的子畫面，則與較小的子畫面並排在晝面 400的另一側。而若是較小的子晝面數目太多，則在晝面 400排列有較小子晝面的一側還可以顯示一拖曳工具422。 201210321 請合併圖3、圖4A到圖4C，當這些子畫面其中之一 被選擇’例如在圖4A中’使用者選擇了子畫面406。此時， 控制裝置304會在對應的使用者主機上播放被選擇之子晝 面406所對應的音訊。另外，在一些實施例中，控制裝置 304還會在對應之使用者主機的晝面400上，顯示被選擇 之子畫面所對應之即時影音訊息相關的資訊。 當使用者要選擇完全觀看所選擇的子晝面時，控制裝 置304就會在對應之主機的畫面400上以全螢幕顯示被選 擇要完全觀看之子畫面所對應的即時影音訊息的視訊，並 且在對應的使用者主機上播放對應的音訊。 圖5繪示為依照本發明之一較佳實施例的一種影音播 放方法的步驟流程圖。請參照圖5，在本實施例中，首先 可以如步驟S502所述’透過一區域網路與多個使用者主機 連線。另外，本實施例還可以如步驟S5〇4所述，接收多個 即時影音訊息。藉此’本實施例就可以進行步驟S506，就 是將這些即時影音訊息轉換成多個影音串流訊號。另外， 本實施例還會檢查在區域網路上是否接收到從使用者主機 其中之一所發出的請求，就如步驟S508所述。 當在區域網路上接收到從使用者主機其中之一所發 出的請求時(就是步驟S508所標示的“是”）’則進行步驟 S5l〇 ’就是將影音串流訊號透過區域網路傳送到對應的使 用者主機，並且以多個子畫面的形式來顯示，例如圖4a 到圖4C所繪示般。接著，如步驟S512所述，判斷使用者 疋否選擇上述子晝面其中之一。當發現子畫面其中之一被 選擇時，則在對應之使用者主機所顯示的畫面上，顯示被 201210321 選擇之子晝面所對應之即時影音訊息的相關資訊。 綜上所述，本發明是依據使用者的請求，而將對應於 多個即時影音訊息的影音串流訊號透過區域網路傳送至使 用者主機，並且以子晝面的形式來顯示，因此本發明可以 讓使用者快速的找到所要觀看的影音。另外，由於解調器 等影音訊號源是設定在頭端，因此使用者不必使用特殊的 使用者主機，就可以同時觀看多個頻道的影音。此外，由 於使用者主機可以透過區域網路而與本發明的影音播放系 統連線，因此本發明也可以應用於社區大樓，使得社區大 樓内的住戶透過相同的影音播放裝置，而可以觀賞到不同 的影音視訊。 雖然本發明已以較佳實施例揭露如上，然其並非用以 限定本發明’任何熟f此技藝者，在减縣發明之精神 和範圍内，當可作些許之更動與潤飾，因此本發明之保護 範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 圖1繪示為習知之有線電視系統的方塊圖。 圖2繪示為依照本發明之一較佳實施例的一種互動式 影音系統的方塊圖。 "" 圖3繪示為依照本發明之一較佳實施例的一種影音播 放系統的方塊圖。 圖4A繪示為依照本發明之第一實施例的一種以子晝 面來顯示即時影音訊息的示意圖。 — 201210321 圖4B和圖4C繪示為依照本發明第二實施例的一種以 子晝面來顯示即時影音訊息的示意圖。 圖5繪示為依照本發明之一較佳實施例的一種影音播 放方法的步驟流程圖。 【主要元件符號說明】 100 102 104 106 108 112 有線電視系統 202 :頭端 主幹線 分配網路 用戶端 114、116 :使用者主機 200 互動式影音系統 204 播放系統 206 區域網路 208 使用者端 212、214和216:即時影音訊息源 222、224和226 :使用者主機 302 :即時影音訊息源接收端 304 :控制裝置 306 :網路連接端 400 :畫面 402、404、406、414、416 :子晝面 422 :拖曳工具 AV卜AV2、AV3 : 時影音訊息 13 201210321 AV_STR[1:N]:影音串流訊號 S502、S504、S506、S508、S510、S512、S514 :影音播 放方法的步驟流程St receives the instant video and audio, and the multiple sources provided by the source are (four) news ~, the network material is connected to the secret road. Control the instant video message receiving end and the network connection to convert these instant messages into multiple video stream signals. Another: 曰 ° User's main ship * Force 7 Bu control position will also be in response to the machine - through the regional network - request some audio and video streaming through the district _ road to the corresponding enable = and The form of multiple sub-pictures is displayed at the same time, f shows two sides of which - when selected, the corresponding * is used;: the instant video information corresponding to the sub-selection of the sub-picture, from another point of view, the present invention further provides A video and audio playback method 201210321 includes connecting a plurality of user hosts through a local area network, and receiving more than 2 hours of video and audio messages. Then, these instant video messages are converted into a plurality of ~ 曰 stream signals. When receiving the request from the user host in the area, the video stream signals are sent to the corresponding money domain through the area road, and are displayed in the form of multiple sub-pictures. These instant video and audio messages. In addition, when these sub-surfaces are selected, the related information of the instant video and audio information corresponding to the selected sub-surface is displayed on the corresponding controller host. " In the embodiment of the present invention, the step of displaying these instants: messages in a sub-picture includes arranging the two sub-surfaces in an array on a screen displayed by the user host. In another embodiment, a plurality of smaller sub-surfaces are disposed on one side of the picture displayed in the time domain, and a larger sub-surface is placed on the smaller sub-surface. Side by side on the other side of the screen displayed by the user's host. In addition, the above-mentioned information about the instant video information f corresponding to the selected sub-picture includes the volume, channel, number, name of the instant video message, network protocol address, national flag, country or region name, country or The current time of the region, the current time of the country or region, and the channel name of the video stream signal. Since the present invention transmits the video stream to the user host through the area network and displays it in a sub-face type, the user can be allowed to simultaneously view multiple instant videos without using a special user host. message. The above and other objects, features, and advantages of the present invention will become more apparent <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; Embodiments FIG. 2 is a block diagram of an interactive video and audio system in accordance with a preferred embodiment of the present invention. Referring to FIG. 2, the interactive video system 200 provided in this embodiment includes a head end 202, a play system 204, a regional network 206, and a user end 208. Headend 208 has a plurality of instant video source sources, such as 212, 214, and 216, that can be coupled to playback system 204. In addition, the playback system 204 can be connected to a plurality of user hosts (e.g., 222, 224, and 226) in the user side (or referred to as the client) 208 via the local area network 206. Among them, the user hosts 222, 224 and 226 include a television, a computer device and a mobile device having a network connection function. These instant video sources 212, 214, and 216 can provide at least one instant video message, such as AV Bu AV2 and AV3, to playback system 204, respectively. In addition, when the playback system 204 receives these video messages avi, AV2 and AV3 simultaneously, it can also retrieve relevant information of the instant video messages AV1, AV2 and AV3, for example, the volume, channel, number, and program of the corresponding instant video message. Name, network protocol address, national flag, name of country or region, current time of country or region, current time of country or region, channel name of video and audio stream signal, etc. 3 is a block diagram of a video playback system in accordance with a preferred embodiment of the present invention. Referring to FIG. 2 and FIG. 3, the playback system 204 provided in this embodiment includes at least one instant video source receiving end 302, a control device 304, and a network connection end 306. The control device 201210321 is coupled to the instant video source sources 212 214 and 216 through the instant video source receiving terminal 〇2 to receive the instant video messages AV bu AV2 and AV3. In some embodiments, the instant video source receiving terminal 3〇2 may be a vertical network connection terminal ’ and the corresponding real-time video and audio signal source may be a plurality of video server. Therefore, the video source receiver can connect to these video servers via the Internet to receive instant video messages AV1, AV2 and AV3. In these embodiments, the video server can provide programs in different countries or regions as instant video messages AV1, AV2, and AV3. In addition, the instant video source receiving end 302 can also be a demodulator interface, so the corresponding instant video signal source can be implemented by using multiple demodulator. Since a demodulator can demodulate the signal of one channel, the instant video messages AV1, AV2 and AV3 can be different channel signals. In other embodiments, the instant video source receiving terminal 3〇2 can be implemented by using an audio and video signal interface, such as a high resolution multimedia interface (HDMI) interface. In this way, the video signal source receiving end 3〇2 can be coupled to the instant video and audio message source of the DVD player's video and audio playback device, and the receiving video and audio playback device can reproduce the video and audio signal on the storage medium as the instant video and audio message AVI. , AV2 and AV3. In addition, the control device 306 is also connected to the regional network 206 via the network connection terminal 〇6. When the control device 3〇4 receives the instant video messages AVI, AV2 and AV3, it converts into a plurality of video stream signals AV_STR[1:N], and N is an integer greater than one. In this embodiment, the user can log in to the playback system 204 through any of the user hosts 222, 224, and 226. For example, the user can connect to a web page provided by the playback system 204 via the local area network 206 201210321 by operating any of the user hosts 222, 224, and 226. In addition, the user can log in to the playback system 204 after entering the identity code and password on the web page. Then, the user can make a request to view the instant video message to the playing system 204 through any of the user hosts 222, 224, and 226. When the control device 304 receives a request from any of the user hosts 222, 224, and 226, it responds to the request and sends the video stream signal AV_STR[1:N] to the corresponding user host. At this time, the related information of the above-mentioned instant video messages AV1, AV2 and AV3 is also sent to the corresponding user host. When the video stream signal AV_STR[1:N] is sent to the corresponding user host, the video and audio messages AV1 and AV2 are displayed in the form of multiple sub-screens on the display surface of the corresponding user host. And AV3 video content. 4A is a schematic diagram showing a video and audio message displayed in a sub-surface according to a first embodiment of the present invention. In Fig. 4A, on the screen 4 displayed by the corresponding user host, video content of the instant video messages AV1, AV2, and AV3 is displayed using a plurality of sub-frames, such as 402, 404, and 406. In the present embodiment, these sub-planes are arranged in an array. 4B and 4C are schematic diagrams showing a video and audio message displayed in a sub-surface according to a second embodiment of the present invention. Referring to FIG. 4B and FIG. 4C in combination, in the present embodiment, the sub-plane includes a plurality of smaller sub-pictures, such as 414 and 416, which are disposed on one side of the side 4〇〇. In addition, the sub-picture also includes a larger sub-picture, which is placed alongside the smaller sub-picture on the other side of the kneading surface 400. If the number of smaller sub-planes is too large, a drag tool 422 can also be displayed on the side of the face 400 in which the smaller sub-planes are arranged. 201210321 Please merge FIG. 3, FIG. 4A to FIG. 4C, when one of these sub-pictures is selected 'eg in FIG. 4A' the user selects the sub-picture 406. At this time, the control device 304 plays the audio corresponding to the selected sub-surface 406 on the corresponding user host. In addition, in some embodiments, the control device 304 also displays information related to the instant video message corresponding to the selected sub-picture on the face 400 of the corresponding user host. When the user wants to select to view the selected sub-frame completely, the control device 304 displays the video of the instant video message corresponding to the sub-picture selected to be completely viewed on the screen 400 of the corresponding host, and The corresponding user plays the corresponding audio on the host. FIG. 5 is a flow chart showing the steps of a video playback method according to a preferred embodiment of the present invention. Referring to FIG. 5, in this embodiment, first, as shown in step S502, a plurality of user hosts are connected through a local area network. In addition, the embodiment may also receive multiple instant video and audio messages as described in step S5〇4. By this embodiment, step S506 can be performed to convert the instant video and audio messages into a plurality of video stream signals. In addition, the embodiment also checks whether a request issued from one of the user hosts is received on the local area network, as described in step S508. When receiving a request from one of the user hosts on the local area network (that is, "Yes" indicated in step S508), proceeding to step S51 is to transmit the video stream signal to the corresponding network through the area network. The user host is displayed in the form of multiple sub-pictures, such as those depicted in Figures 4a through 4C. Next, as described in step S512, it is determined whether the user selects one of the above-mentioned sub-surfaces. When one of the sub-pictures is selected, the related information of the instant video information corresponding to the sub-surface selected by 201210321 is displayed on the screen displayed by the corresponding user host. In summary, according to the user's request, the video stream signal corresponding to the plurality of instant video and audio messages is transmitted to the user host through the area network, and is displayed in the form of a sub-surface, so The invention allows the user to quickly find the audio and video to be viewed. In addition, since the audio and video source such as the demodulator is set at the head end, the user can simultaneously view the video and audio of multiple channels without using a special user host. In addition, since the user host can be connected to the video playback system of the present invention through the local area network, the present invention can also be applied to a community building, so that the residents in the community building can view different through the same audio and video playback device. Video and video. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and the invention may be modified and retouched within the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a conventional cable television system. 2 is a block diagram of an interactive video and audio system in accordance with a preferred embodiment of the present invention. "" Figure 3 is a block diagram of an audiovisual playback system in accordance with a preferred embodiment of the present invention. 4A is a schematic diagram showing a video and audio message displayed in a sub-surface according to a first embodiment of the present invention. — 201210321 FIG. 4B and FIG. 4C are schematic diagrams showing the display of instant video and audio information in a sub-surface according to a second embodiment of the present invention. FIG. 5 is a flow chart showing the steps of a video playback method according to a preferred embodiment of the present invention. [Main component symbol description] 100 102 104 106 108 112 Cable television system 202: head end trunk line distribution network client 114, 116: user host 200 interactive video system 204 playback system 206 area network 208 user terminal 212 214 and 216: instant video source 222, 224 and 226: user host 302: instant video source receiving end 304: control device 306: network connection 400: picture 402, 404, 406, 414, 416: sub面面422: Drag tool AV Bu AV2, AV3: Video and audio message 13 201210321 AV_STR[1:N]: Video stream signal S502, S504, S506, S508, S510, S512, S514: Step flow of video and audio playback method