201218717 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種藍芽多播傳輸方法及系統，特別關 於一種支持視訊傳輸規範之藍芽多播傳輸方法及系統。 【先前技術】 藍芽通訊技術亦具有低成本、低功率、多方鏈結 (Multiple Links)以及可同時傳送語音及資料的特性，所 以它現在已成為短距離無線通訊的主要技術。 基本上，藍芽通訊技術為一短距離的無線通訊技術， 其主要目的是要取代有線傳輸以及距離過短且不具穿透 十生的紅外線通訊傳輸（Infrared Data Association, IrDA )。 藍芽的射頻通訊是使用在2.4〜2.497GHz的ISM (Industrial Scientific Medical)頻帶，雖然任何的無線通 訊器材都可在此頻帶使用，但由於藍芽通訊技術採用了跳 頻展頻技術（Frequency-Hopping-Spread-Spectrum, FHSS)，以每秒1600次的通道（channel)改變來抵抗其 他無線訊號的干擾。 在藍芽通訊技術中，除了有許多的協定（protocol)以 供遵守之外，亦在這些協定中發展了許多的規範（profile) 以實現多種使用者模式之應用及功能，例如：A2DP (Advanced Audio Distribution Profile )係描述如何讓一多 媒體發送端（例如一 mp3 player)輸出如立體聲等級之語 音訊號至一接收端（例如一藍芽耳機）；耳機規範（Headset 201218717201218717 VI. Description of the Invention: [Technical Field] The present invention relates to a Bluetooth multicast transmission method and system, and more particularly to a Bluetooth multicast transmission method and system supporting video transmission specifications. [Prior Art] Bluetooth communication technology also has the characteristics of low-cost, low-power, multiple links and simultaneous transmission of voice and data, so it has become the main technology of short-range wireless communication. Basically, Bluetooth communication technology is a short-range wireless communication technology whose main purpose is to replace wired transmission and Infrared Data Association (IRDA) that is too short and does not penetrate. Bluetooth RF communication is used in the 2.4 to 2.497 GHz ISM (Industrial Scientific Medical) band. Although any wireless communication equipment can be used in this frequency band, Bluetooth communication technology uses frequency hopping spread spectrum technology (Frequency- Hopping-Spread-Spectrum, FHSS), with 1600 channel changes per second to resist interference from other wireless signals. In Bluetooth communication technology, in addition to many protocols for compliance, many profiles have been developed in these protocols to implement applications and functions of multiple user modes, such as: A2DP (Advanced Audio Distribution Profile describes how to enable a multimedia sender (such as an mp3 player) to output a voice signal such as a stereo level to a receiving end (for example, a Bluetooth headset); Headset Specification (Headset 201218717)
Profile，HSP)係描述一支援藍芽（Bluet〇〇ihEnabled)的 耳機如何與一電腦或其他支援藍芽的終端裝置（例如一行 動電話）建立通訊；串列埠規範（Serialp〇rtPr〇file，spp) 係定義如何在二個支援藍芽的電子裝置之間，建立虛擬的 串列埠並使其連結，以代替現有的RS_232有線串列傳輸 介面。 此外，最近開始發展起來的視訊傳輸規範 (video distribution profile，VDP )也多有應用於可傳輸視訊的電子 鲁 裝置上。VDP疋義了 一些協定及步驟（procedure )，並藉 .由使用ACL通道來實現視訊資料的傳輸。一種典型的應用 例子為從使用者的攝像機傳送視訊資料至一顯示器，並且 視訊資料需依據一格式被壓縮以應付有限頻寬。並且值得 一提的是’ VDP亦可容讓傳輸預先混合的視訊及聲音資料 (pre-multiplexed stream of video and audio ) ° 然而’就如VDP規格書上所詳述的：“ The profile does not support a synchronized point-to-multipoint • distribution” ，即VDP不支援多播傳輸。這也大大限制 VDP的應用範圍，進而消減VDP所帶來的功效。 因此，如何提供一種支持視訊傳輸規範之藍芽多播傳 輸方法及系統，因而擴增VDP的應用範圍並提升其功效， 已成為重要課題之一。 【發明内容】 有鑑於上述課題，本發明之目的為提供一種支持視訊 5 201218717 傳輸規1巳之監芽多播傳輸方法及系統，因而擴增v抑的鹿 用範圍並提升其功效。 μ —，達上述目的，依據本發明之一種支持視訊傳輪規範 之監牙多播傳輸方法，應用於一來源端裳置及複數接收端 裝置，來源端裝置等接收端裝置係支持視訊傳輸規範 (VDP)。藍芽多播傳輪方法包含：藉由來源端裝置與一第 接收、裝置配對；在與第一接收端褒置配對之後，藉由 來源女而裝置與-第二接收端裝置配對；在來源端裝置盘第 -接收端裝置之間開啟一 L2CAp命令通道及一 L2CAp資 料通道，在來源端裝置與第二接收端裝置之間開啟另一 L2CAP命令通道及另—L2CAp資料通道；藉由來源端裝 置將-視訊資料傳送至第一接收端裝置；以及藉由來源端 裝置將視sfl資料傳送至第二接收端裝置。 ，達上述目的’依據本發明之—社持視訊傳輸規範 之藍芽多播傳輸系統包含一來源端裝置、一第一接收端裝 ，以及一第二接收端裝置。來源端裝置支持視訊傳輸規 範。第一接收端裝置支持視訊傳輸規範。第二接收端裴置 支持視訊傳輸規範。其中，來源端裝置依序與第一接收端 裝置及第二接收端裝置配對，在來源端裝置與第一接收端 裝置之間開啟一 L2CAP命令通道及一 L2CAP資料通、首 在來源端裝置與該第二接收端裝置之間開啟另一 命令通道及另- L2CAP資料通道，使來源端裝置依序傳 送一視訊資料至第一接收端裝置及第二接收端褒置。 承上所述，本發明藉由利用更改過的藍芽配對註冊 201218717 (L2CAP擴充）模組，使來源端裝置可依序與多個接收端 裝置配對，並分別與該等接收端之間開啟L2CAP命令通 道（command channel)及 ’ UCAP 資料通道（stream channel)，進而籍由上述通道傳送同樣的視訊資料及/或聲 音資料。如此，本發明之支持視訊傳輸規範之藍芽多播傳 輸方法及系統可應用於一來源端裝置與多個接收端裝置 之間，進而擴增VDP的應用範圍並提升其功效。 φ 【實施方式】 以下將參照相關圖式，説明依本發明較佳實施例之一 s 種支持視訊傳輸規範之藍芽多播傳輸方法及系統，其中相 同的元件將以相同的參照符號加以說明。 圖1為藍芽架構100的示意圖。於藍芽架構100中， 底層為實體層，其定義例如藍芽調變解調器（Bluetooth modem )，無線頻率收發器（radio frequency transceiver )， 或其它等等藍芽無線通訊系統中採用之硬體之協定。硬體 鲁 層之上的藍芽層協定架構包含核心協定（core protocols )， 缓線替代協定（cable replacement protocols)，電話控制協 定（telephony control protocols)，以及選用協定（adopted protocols )。藍芽的核心協定組成一五層的堆疊（five-layer stack )，包含：藍芽無線層（Bluetooth Radio )、基頻層 (Baseband )、連結管理協定（Link Manager Protocol, LMP )、邏輯連結控制與適應協定層（Logical Link Control and Adaptation Protocol，L2CAP)，以及服務發現協定 s 7 201218717 (Service Discovery Protocol，SDP )。藍芽無線層包含空中 介面（air interface)之特定細節，包含頻率、跳頻（frequency hopping)、調變機制（modulation scheme)以及傳輸功率。 基頻層主要關注於一微網（piconet)内建立一連結、位址 指配、封包格式、計時（timing )以及功率控制。連結管 理協定（LMP )層於藍芽設備之間建立連結並管理運行中 的鏈路，其包含安全方面操作（例如驗證與加密），以及 基頻封包大小之控制及協調。邏輯連結控制與適應協定 (L2CAP)將上層協定（upper-layer protocols)應用於基 頻層，提供無連結與連結導向之服務。服務發現協定（SDP ) 處理兩個或更多藍芽設備之間的設備訊息、服務、以及查 詢服務特性等操作。 射頻通訊（Radio Frequency COMMunications, RFCOMM )是纜線替代協定，其用來產生一虛擬串列埠 (virtual serial port)，該虛擬串列埠透過對現有設備作極 小調整來替代纜線技術。RFCOMM於藍芽基頻層上提供 二元資料（binary data)傳輸及模仿「建議標準232」 (Recommended Standard 232, RS-232)之控制信號。電話 控制協定二進制（Telephony Control protocol-binary, TCS BIN)是位元導向協定（bit-〇riented protocol)，其定義藍 芽設備之間建立語音及資料電話的通話控制指令。另外， TCS BIN還定義處理藍芽TCS設備組的行動管理流程 (mobility management procedure)。 選用協定由其它標準製造組織定義並納入藍芽協定 201218717 堆疊，允許藍芽只有在需要時才產生協定。選用協定包含 點對點通訊協定（Point-to-Point Protocol，PPP )， TCP/IP/UDP、物件交換協定（Object Exchange Protocol， OBEX )以及無線應用環境/無線應用協定（Wireless Application Environment/Wireless Application Protocol, WAE/WAP)。點對點通訊協定是於點對點連結上用來傳輸 IP資料封包的internet網路標準協定。TCP/IP/UDP是 TCP/IP協定組之基礎協定。物件交換協定（object • Exchange Protocol，OBEX)是用於物件交換的會議層協定 (session-layer protocol)，其提供物件與操作表示的模 型。無線應用環境（WAE)具體描述無線設備之應用框架， 以及無線應用協定（WAP)是提供無線使用者能夠存取電 話及訊息服務的開放標準。 為了使用藍芽，設備必須要與一定藍芽規範相容。藍 芽規範是特定藍芽服務的無線介面規範。藍芽規範說明如 鲁 何完成藍芽設備的實施。由於本發明重點在於視訊傳輸規 範（VDP )，圖2顯示視訊傳輸規範的依賴性（Profile Dependency)，下面將簡要說明。 通用存取規範（Generic Access Profile，GAP)提供所 有其它規範的基礎。通用音訊/視訊傳輸規範（General Audio/Video Distribution Profile, GAVDP)提供進階音訊播 放規摩色（Advanced Audio Distribution Profile，A2DP)及視 §孔傳輸規範（Video Distribution Profile, VDP)之基礎， GAVDP係定義建立音訊/視訊流（au(ji〇/video streaming) 9 201218717 所需的步驟。進階音訊播放規範（A2DP)是一個定義高品 質音訊（立體聲或單聲道）如何透過藍芽連結從一個設備 傳至另一個設備的規範。視訊傳輸規範（VDP)定義特定 用以視訊傳輸之參數及步驟並允許傳輸視訊流，舉例來 說，VDP能被用來把記錄之視訊從PC多媒體中心傳輸至 可攜式播放器，或從數位照相機傳輸至電視機。音訊/視訊 遙控規範（Audio/Video Remote Control Profile，AVRCP) 被設計用來提供一標準介面，以控制如電視機、Hi-fi設備 或其它裝置，並允許使用者用單一遙控器（或其它設備） 來控制所有使用者可存取之AudioAVideo裝置。 圖3顯示在視訊傳輸規範（VDP)中所使用的協定 (protocols)及物件（entities)。其中，基頻層（Baseband)、 連結管理協定（LMP )、邏輯連結控制與適應協定層 (L2CAP) ’以及服務發現協定（SDP)係屬於核心協定且 已於上文說明，故不再贅述。音/視訊傳輸協定 (Audio/Video Distribution Transport Protocol, AVDTP )義 音/視訊傳輸的溝通、建立以及傳輸的步驟，並允許藍芽裝 置之間經由已建立之L2CAP通道進行點對點（p〇int_to point)的訊號傳輸。 上述係簡述藍芽架構以及VDP的協定堆疊（pr〇t〇c〇1 stack)，以下即說明本發明較佳實施例之一種支持視訊傳 輸規範之藍芽多播傳輸方法及系統。 本實施例之藍芽多播傳輸方法係如圖4所示，其應用 於如圖5所示之藍芽多播傳輸系統2，藍芽多播傳輸系統 201218717 2係包含-來源端裝置21、—第—接收端裝置22以及— 第'一接收端裝置23。 來源端裝置21係支持視訊傳輸規範（VDP)，其可包 含:控制模組211、—藍芽模組212及-攝像模組213， 藍牙模組212内具有一 L2CAp擴充（）模組2 ^ 4。 來源端裝置21例如為一具有藍芽傳輸之攝像機、筆記型 電腦、手持通訊裳置等。攝像模組213例如一攝像機，可 提供視訊資料供藍芽模組212傳輸。當然，來源端裝置Μ 亦可不必包3攝像模組，其可自行產生視訊資料，例如影 像槽^另外，控制模組211例如可包含一處理器（p職請） 汉所而要之权硬體，如記憶體及韋刀體。藍芽模組犯例如 可包含藍芽晶片組及其驅動程式等。 第接收端裝置22支持視訊傳輸規範（VDp)，1可 包含一控制模、组221、-藍芽模組222及一顯示模組奶。 第:接收端裝置22例如為具有顯示器之手持通訊裝置、 筆沾型電腦、或電視等。顯示模組如可依據視訊資料顯 示第接收端裳置23支持視訊傳輸規範（vDp)，其可 包含一控制模組231、—藍芽模組232及-顯示模組23、3。 第-接收端裳置23例如為具有顯示器之手持通訊農置、 筆記型電腦、或電視等。顯示模組233可依據視訊資料顯 示。 在本實施例之藍芽多播值私 傳輸方法一開始時，來源端裝 置21依序與P接收職置22及第二接收端裝置23配 對。而在配對之丽’來源端農置21可將視訊傳輸規範來Profile, HSP) describes how a Bluetooth enabled Bluetooth headset can communicate with a computer or other Bluetooth-enabled terminal device (such as a mobile phone); serial port specification (Serialp〇rtPr〇file, Spp) defines how to create and connect virtual serial ports between two Bluetooth-enabled electronic devices to replace the existing RS_232 wired serial transmission interface. In addition, the recently developed video distribution profile (VDP) is also used in electronic devices that can transmit video. VDP depreciates some protocols and procedures, and uses ACL channels to transmit video data. A typical application example is the transmission of video data from a user's camera to a display, and the video data is compressed according to a format to accommodate a limited bandwidth. And it is worth mentioning that 'VDP can also allow pre-multiplexed stream of video and audio. ° However, as detailed in the VDP specification: "The profile does not support a synchronized point-to-multipoint • distribution”, that is, VDP does not support multicast transmission. This also greatly limits the scope of application of VDP, which in turn reduces the effectiveness of VDP. Therefore, how to provide a Bluetooth multicast transmission method and system supporting the video transmission specification, thereby expanding the application range of VDP and improving its efficiency, has become one of the important topics. SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a method and system for monitoring broadcast transmission supporting video transmission 5 201218717, thereby amplifying the range of deer and improving its efficiency. Μ-, for the above purpose, according to the present invention, a method for supporting a multicast transmission of a video transmission wheel is applied to a source-side and multiple-receiving device, and the source device and the like have a video transmission specification. (VDP). The Bluetooth multicast routing method comprises: pairing with a receiving device by a source device; pairing with the first receiving device, and pairing with the second receiving device by the source female; at the source An L2CAp command channel and an L2CAp data channel are opened between the first device and the receiving device, and another L2CAP command channel and another L2CAp data channel are opened between the source device and the second receiving device; The device transmits the video data to the first receiving device; and transmits the video data to the second receiving device by the source device. The Bluetooth transmission transmission system according to the present invention is a source device, a first receiver, and a second receiver. The source device supports video transmission specifications. The first receiving device supports a video transmission specification. The second receiving end device supports the video transmission specification. The source device is sequentially paired with the first receiving device and the second receiving device, and an L2CAP command channel and an L2CAP data channel are opened between the source device and the first receiving device, and the source device is Another command channel and another L2CAP data channel are opened between the second receiving end devices, so that the source device sequentially transmits a video data to the first receiving device and the second receiving device. As described above, the present invention registers the 201218717 (L2CAP extension) module by using the modified Bluetooth pairing, so that the source device can be paired with multiple receiver devices in sequence, and respectively opened between the receivers and the receivers. The L2CAP command channel (command channel) and the 'UCAP data channel (stream channel), and then transmit the same video data and / or sound data through the above channels. Thus, the Bluetooth multicast transmission method and system supporting the video transmission specification of the present invention can be applied between a source device and a plurality of receiver devices, thereby amplifying the application range of the VDP and improving its efficiency. [Embodiment] Hereinafter, a Bluetooth multicast transmission method and system supporting a video transmission specification according to a preferred embodiment of the present invention will be described with reference to the related drawings, wherein the same elements will be described with the same reference numerals. . FIG. 1 is a schematic diagram of a Bluetooth architecture 100. In the Bluetooth architecture 100, the bottom layer is a physical layer, which defines, for example, a Bluetooth modem, a radio frequency transceiver, or the like used in a Bluetooth wireless communication system. Agreement of the body. The Bluetooth protocol architecture above the hardware layer includes core protocols, cable replacement protocols, telephony control protocols, and adopted protocols. The core protocol of Bluetooth consists of a five-layer stack, including: Bluetooth Radio, Baseband, Link Manager Protocol (LMP), and logical link control. The Logical Link Control and Adaptation Protocol (L2CAP), and the Service Discovery Protocol (SDP). The Bluetooth radio layer contains specific details of the air interface, including frequency, frequency hopping, modulation scheme, and transmission power. The baseband layer focuses on establishing a link, address assignment, packet format, timing, and power control within a piconet. The Link Management Protocol (LMP) layer establishes links between Bluetooth devices and manages active links, including security aspects of operations (such as authentication and encryption), and control and coordination of baseband packet sizes. The Logical Link Control and Adaptation Protocol (L2CAP) applies upper-layer protocols to the baseband layer to provide a linkless and link-oriented service. The Service Discovery Protocol (SDP) handles device information, services, and query service characteristics between two or more Bluetooth devices. Radio Frequency COMMunications (RFCOMM) is a cable replacement protocol used to generate a virtual serial port that replaces cable technology by making minimal adjustments to existing equipment. RFCOMM provides binary data transmission on the Bluetooth baseband and mimics the control signal of Recommendation Standard 232 (RS-232). The Telephony Control Protocol-binary (TCS BIN) is a bit-〇riented protocol that defines the call control commands for establishing voice and data calls between Bluetooth devices. In addition, TCS BIN also defines a mobility management procedure for handling Bluetooth TCS device groups. The selection agreement is defined by other standards manufacturing organizations and incorporated into the Bluetooth Agreement 201218717 stack, allowing Bluetooth to generate agreements only when needed. The selection protocol includes Point-to-Point Protocol (PPP), TCP/IP/UDP, Object Exchange Protocol (OBEX), and Wireless Application Environment/Wireless Application Protocol (Wireless Application Environment/Wireless Application Protocol). WAE/WAP). A peer-to-peer protocol is an internet standard protocol used to transport IP data packets over a point-to-point link. TCP/IP/UDP is the underlying protocol for the TCP/IP protocol suite. The Object Exchange Protocol (OBEX) is a session-layer protocol for object exchange that provides a model of object and operational representation. The Wireless Application Environment (WAE) specifies the application framework for wireless devices, and the Wireless Application Protocol (WAP) is an open standard that provides wireless users with access to voice and messaging services. In order to use Bluetooth, the device must be compatible with certain Bluetooth specifications. The Bluetooth specification is the wireless interface specification for specific Bluetooth services. The Bluetooth specification explains how to complete the implementation of Bluetooth devices. Since the present invention focuses on the Video Transmission Specification (VDP), Figure 2 shows the Dependency of the Video Transmission Specification, which will be briefly explained below. The Generic Access Profile (GAP) provides the basis for all other specifications. The General Audio/Video Distribution Profile (GAVDP) provides the basis for Advanced Audio Distribution Profile (A2DP) and Video Distribution Profile (VDP), GAVDP Define the steps required to create an audio/video stream (au(ji〇/video streaming) 9 201218717. The Advanced Audio Playback Specification (A2DP) is a definition of how high quality audio (stereo or mono) is connected via a Bluetooth link from The specification of the device to another device. The Video Transmission Specification (VDP) defines the parameters and steps specific to the video transmission and allows the transmission of the video stream. For example, the VDP can be used to transmit the recorded video from the PC multimedia center to A portable player, or from a digital camera to a television. The Audio/Video Remote Control Profile (AVRCP) is designed to provide a standard interface to control devices such as televisions, Hi-fi devices or Other devices and allow the user to control all user-accessible Audio with a single remote control (or other device) AVideo device. Figure 3 shows the protocols and entities used in the Video Transmission Specification (VDP), where the baseband, link management protocol (LMP), logical link control and adaptation protocol layer (L2CAP) 'and the Service Discovery Agreement (SDP) are core protocols and have been described above, so we will not repeat them. Audio/Video Distribution Transport Protocol (AVDTP) audio/video transmission communication, The steps of establishing and transmitting, and allowing the point-to-point (p〇int_to point) signal transmission between the Bluetooth devices via the established L2CAP channel. The above is a brief description of the Bluetooth architecture and the protocol stack of the VDP (pr〇t〇c〇) 1 stack), the following describes a Bluetooth broadcast transmission method and system supporting the video transmission specification according to a preferred embodiment of the present invention. The Bluetooth multicast transmission method in this embodiment is shown in FIG. 4, and is applied to, for example, The Bluetooth multicast transmission system 2 shown in FIG. 5, the Bluetooth multicast transmission system 201218717 2 includes a source device 21, a first receiving device 22, and a first receiving device 23. The source device 21 supports a video transmission specification (VDP), which may include: a control module 211, a Bluetooth module 212, and a camera module 213. The Bluetooth module 212 has an L2CAp extension module 2^ 4. The source device 21 is, for example, a camera having a Bluetooth transmission, a notebook computer, a handheld communication device, and the like. The camera module 213, for example a camera, can provide video data for transmission by the Bluetooth module 212. Of course, the source device 亦可 does not have to include a camera module, which can generate video data by itself, such as an image slot. In addition, the control module 211 can include, for example, a processor (p job). Body, such as memory and Wei knife body. The Bluetooth module can include, for example, a Bluetooth chipset and its driver. The receiving device 22 supports a video transmission specification (VDp), and may include a control module, a group 221, a Bluetooth module 222, and a display module. The receiving end device 22 is, for example, a handheld communication device having a display, a pen-stained computer, or a television. The display module can display a video transmission specification (vDp) according to the video data display, and can include a control module 231, a Bluetooth module 232, and a display module 23, 3. The first-receiving end skirt 23 is, for example, a handheld communication farm having a display, a notebook computer, or a television. The display module 233 can be displayed according to the video material. At the beginning of the Bluetooth multicast value private transmission method of the present embodiment, the source device 21 is sequentially paired with the P receiving station 22 and the second receiving device 23. And in the pair of Li's source, the farmer's 21 can use video transmission specifications.
S 11 201218717 源（source)服務註冊至來源端裝置21之藍芽服務發現協 定（service diSc〇very pr〇t〇c〇1，SDP)服務中，第〜接收端 裝置22可將VDP接收（sink)服務註冊至第—接收端之 藍芽SDP服務中，第二接收端裝置23可將VDp接收（3^^) 服務註冊至第二接收端之藍芽SDP服務中。 在配對的過程中，來源端裝置21利用更改過的L2CAP 擴充模組214可以建立超過一個的VDP連線。首先，第一 接收端裝置22搜尋來源端裝置21的VDP服務，然後第一 接收端裝置22向來源端裝置21要求認證，來源端裝置21 也必須向第一接收端裝置22要求認證’在認證配對的過 糕’來源端裝置21會記錄第一接收端裝置22的藍芽媒體 存取控制位址（MAC address)，同時第一接收端裝置22 也會在認證配對的時候，記錄來源端裝置21的藍芽媒體 存取控制位址。經過以上的步驟完成了一個Sink-Source 的配對’即來源端裝置21與第一接收端裝置22配對完 成。同理，來源端裝置21與第二接收端裝置23的配對藉 由重複以上步驟亦可完成。 接下來，藍芽多播傳輸方法進入一傳輸階段。來源端 裘置21連接第一接收端裝置22,並開啟一 L2CAP命令通 道（command channel)及一 L2CAP 資料通道（stream channel)。同理，來源端裝置21連接第二接收端裝置23 ’ 炎開啟另一 L2CAP命令通及另一 L2CAP資料通道。當通 道開啟之後，藉由來源端裝置21將一視訊資料傳送至第 /接收端裝置22，再藉由來源端裝置21將視訊資料傳送 12 201218717 端裳置23。於此，來源端裝置21係將攝像模 、、犯所產生的資料傳送至第—接收端紫置22及第二接 收鳊裝置23。當然，資料可先經由一 ..進行壓縮及編码。 以議制（例如η·264) 傳幹方^ ^傳运視訊#料之外’本實施例之藍芽多播 傳輸方法可更包含藉由來源端裝置21將一音 至第一接收端展置22，以及藉由 將、 t傳送至第二接收端裝置23,例如是藉由Α2』;;訊 者，卿本身亦可傳送預先混合之音/視訊資料。 呈有接收端裝置22、23作為說明，若應用於S 11 201218717 The source service is registered to the service diSc〇very pr〇t〇c〇1 (SDP) service of the source device 21, and the first receiving device 22 can receive the VDP (sink) The service is registered in the Bluetooth SDP service of the first receiving end, and the second receiving end device 23 can register the VDp receiving (3^^) service to the Bluetooth SDP service of the second receiving end. In the pairing process, the source device 21 can establish more than one VDP connection using the modified L2CAP expansion module 214. First, the first receiving device 22 searches for the VDP service of the source device 21, and then the first receiving device 22 requests authentication from the source device 21, and the source device 21 must also request authentication from the first receiving device 22. The paired cake 'source device 21 records the Bluetooth media access control address (MAC address) of the first receiving device 22, and the first receiving device 22 also records the source device when authenticating the pairing. 21 Bluetooth Media Access Control Address. After the above steps, a pairing of Sink-Sources is completed, that is, the source device 21 is paired with the first receiving device 22. Similarly, the pairing of the source device 21 and the second sink device 23 can be completed by repeating the above steps. Next, the Bluetooth multicast transmission method enters a transmission phase. The source device 21 is connected to the first receiving device 22, and opens an L2CAP command channel and an L2CAP stream channel. Similarly, the source device 21 is connected to the second receiving device 23' to activate another L2CAP command and another L2CAP data channel. After the channel is turned on, a video data is transmitted to the first/receiving device 22 by the source device 21, and the video data is transmitted by the source device 21 at the 201218717 end. Here, the source device 21 transmits the data generated by the camera module and the scam to the first receiving end purple unit 22 and the second receiving unit 23. Of course, the data can be compressed and encoded first. The blue-chip multicast transmission method of the present embodiment can further include a sound to the first receiving end by the source device 21 by means of the communication system (for example, η·264). 22, and by transmitting t to the second receiving device 23, for example, by means of Α2"; the sender itself can also transmit premixed audio/video data. The receiving device 22, 23 is provided as an explanation, if applied
、夕接收知裝置之藍芽多播傳輸系統，則夢 U 驟同樣可達到藍芽多播傳輸。此 曰… 罟R l I ^ +貫她例之來源端裝 如立1/、^置可不僅支持VDP ’亦可支持其他規範，例 曰= 見訊遙控規範⑽㈣）以容讓使㈣控器控制。 芽傳:::Γ,藍芽多播傳輸方法及系統可大幅擴增藍 控圖6所示’可應用於家庭遠端即時監 n要寸步不離的照料，但父母也時常 它務’意外往往就在這幾秒間發生，所以本 個戈 庭範圍内的移動設備解決方案’本系统由- 123(手持Μ 和多個接收端裝置 練方、ί 成，之間使用本實施例之藍芽多播 況'以可以讓多人同時掌握寶寶的狀 況。握^In the case of receiving the Bluetooth multi-cast transmission system of the device, the dream can also reach the Bluetooth multicast transmission. This 曰... 罟R l I ^ + The source of her example is installed as 1/, ^ can not only support VDP 'can also support other specifications, for example = see remote control specification (10) (four)) to allow (four) controller control. Bud Chuan:::Γ, Bluetooth multi-cast transmission method and system can greatly expand the blue control shown in Figure 6 'can be applied to the remote monitoring of the home to be inseparable care, but parents often do it 'accidents often It happened in these few seconds, so this mobile device solution in this Gothic range is powered by -123 (handheld Μ and multiple receiving device devices, ί成, using the Bluetooth of this embodiment) The broadcast situation can allow more people to master the baby's condition at the same time.
S 見早上/、需要—個來源端 13 201218717 裝置提供影音資料，在車上的所有人皆可利用本實施例之 藍芽多播傳輸方法，使用手機接收到影音資料，如此就不 需在車上設置許多電視。當然，應用的範圍還有許多，在 此不—列舉。 為配合本實施例之藍芽多播傳輸方法及系統，圖7顯 示一種主要使用者介面’右邊有六個按紐，分別為：As Source，其係將本裝置做為VDP Source，並註冊至藍芽SDP 中，As S ink :將本裝置做為VDP S ink，並註冊至藍芽SDP 中；Connect :連線；Play :播放串流；VDP Set : VDP 影 像來源等相關設定；BT Set:藍芽配對和搜尋等相關設定。 藉由此使用者介面，可讓使用者輕鬆學會使用本實施例之 藍芽多播傳輸方法及系統。 綜上所述，本發明藉由利用更改過的L2CAP擴充模 組，使來源端裝置可依序與多個接收端裝置配對，並分別 與該等接收端之間開啟L2CAP命令通道（command channel)及一 L2CAP 資料通道（stream channel)，進而藉 由上述通道傳送同樣的視訊資料及/或聲音資料。如此，本 發明之支持視訊傳輸規範之藍芽多播傳輸方法及系統可 應用於一來源端裝置與多個接收端裝置之間，進而擴增 VDP的應用範圍並提升其功效。 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。 14 201218717 【圖式簡單說明】 圖1為監芽架構的示意圖； 物件； 的協定及 圖2顯不視訊傳輸規範（VDP)的依賴性； 圖3顯不在視訊傳輸規範（VDP)中所使用 流程圖 圖 示意圖 =為本發明較佳實施例之—織芽多播傳輸方法的 ^為本發明較佳實施例之-種藍芽多播傳輸系統的 牙夕播傳輸方法應用於家庭遠端即時監控的 示意圖；以及 圖7為藍芽多播傳輪方法之 意圖 種主要使用者介面的 不 【主要元件符號說明】 100 :藍芽架構 • 2:藍芽多播傳輸系統 21 :來源端裝置 211、 221、231 :控制模組 212、 222、232 :藍芽模組 213 :攝像模組 214 : L2CAP擴充模組 22 :第一接收端裒置 223、233 :顯示模组S See morning /, need - source 13 201218717 The device provides audio and video data, everyone in the car can use the Bluetooth multicast transmission method of this embodiment, using the mobile phone to receive audio and video data, so no need to be in the car Set up many TVs on it. Of course, there are many more applications, not here. In order to cooperate with the Bluetooth multicast transmission method and system of the present embodiment, FIG. 7 shows a main user interface 'there are six buttons on the right side, respectively: As Source, which uses the device as a VDP Source and is registered to In the Bluetooth SDP, As S ink: this device is used as VDP S ink, and registered to the Bluetooth SDP; Connect: connection; Play: play stream; VDP Set: VDP image source and other related settings; BT Set: Bluetooth settings and search settings. With this user interface, the user can easily learn to use the Bluetooth multicast transmission method and system of this embodiment. In summary, the present invention enables the source device to be paired with multiple receiver devices in sequence by using the modified L2CAP expansion module, and respectively opens an L2CAP command channel (command channel) with the receivers. And an L2CAP stream channel, which in turn transmits the same video data and/or sound data. Thus, the Bluetooth multicast transmission method and system supporting the video transmission specification of the present invention can be applied between a source device and a plurality of receiver devices, thereby amplifying the application range of the VDP and improving its efficiency. The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the present invention are intended to be included in the scope of the appended claims. 14 201218717 [Simple diagram of the diagram] Figure 1 is a schematic diagram of the supervisory architecture; the agreement of the object; and Figure 2 shows the dependence of the video transmission specification (VDP); Figure 3 shows the flow used in the video transmission specification (VDP). Illustrated diagram of the preferred embodiment of the present invention - the woven bud multicast transmission method is a preferred embodiment of the present invention - the Bluetooth broadcast transmission method of the Bluetooth broadcast transmission method is applied to the home remote monitoring FIG. 7 is a schematic diagram of the main user interface of the Bluetooth multicast transmission method. [Main component symbol description] 100: Bluetooth architecture • 2: Bluetooth multicast transmission system 21: source device 211, 221, 231: control module 212, 222, 232: Bluetooth module 213: camera module 214: L2CAP expansion module 22: first receiving end device 223, 233: display module
S 15 201218717 23 :第二接收端裝置 S01〜S06 :藍芽多播傳輸方法的步驟 16S 15 201218717 23 : Second receiving end device S01~S06 : Steps of the Bluetooth multicast transmission method 16