TWI523522B - System of multimedia brocasting, method and apparatus thereof - Google Patents
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本發明是有關於一種多媒體廣播系統、裝置及方法,特別是關於一種基於移動接收的多媒體廣播系統、裝置及方法。 The present invention relates to a multimedia broadcast system, apparatus and method, and more particularly to a multimedia broadcast system, apparatus and method based on mobile reception.
隨著科技的日益進步,人們對多媒體影音的需求亦日益的提升。在電視廣播信號數位化後,人們對於移動時收看電視等多媒體影音內容之需求亦逐漸的提高,例如在飛機、巴士、火車上等交通工具上移動時收看各式各樣的影音內容。目前可無線接收之數位電視廣播信號,包括了地面(Terrestrial)數位廣播信號或衛星(Satellite)數位電視廣播信號。當在移動的情況接收上述這些信號時,除了此數位電視廣播信號的所符合之傳輸協議標準需具有移動支援(Mobility Support)的能力外,接收端的硬體支援上更同樣的具有一定的要求。 With the advancement of technology, people's demand for multimedia audio and video has also increased. After the digitalization of TV broadcast signals, people's demand for multimedia audio and video content such as watching TV is gradually increasing. For example, when moving on vehicles such as airplanes, buses, trains, etc., various kinds of audio and video content are viewed. Currently, digital television broadcast signals that can be received wirelessly include terrestrial digital broadcast signals or satellite digital television broadcast signals. When receiving these signals in the case of mobile, in addition to the capability of the mobile communication protocol conforming to the digital television broadcast signal to have Mobility Support, the hardware support of the receiving end has more certain requirements.
當接收端欲在移動狀態下接收衛星電視廣播信號時,接收端需具有自動定向能力的碟型天線或是平面相位陣列(Flat Phased-Array)天線,讓天線保有對衛星電視廣播信號最高的增益,讓接收端隨時有最好的接收效果。而當接收端欲接收地面數位廣播信號時,由於移動時所造成的都普勒效應(Doppler Effect)以及多重路徑(multi-path)等問題,接收端通常需具備分集天線(Diversity Antenna) 以及分集合併(Diversity Combining)的技術,才能得到一可供使用者流暢觀賞的影音內容。 When the receiving end wants to receive the satellite TV broadcast signal in the mobile state, the receiving end needs to have an automatic orientation capability of the dish antenna or a flat phased array (Flat Phased-Array) antenna, so that the antenna has the highest gain for the satellite television broadcast signal. Let the receiving end have the best reception effect at any time. When the receiving end wants to receive the terrestrial digital broadcast signal, due to the Doppler Effect and multi-path caused by the mobile terminal, the receiving end usually needs to have a diversity antenna (Diversity Antenna). And the technology of Diversity Combining can get a video content that can be enjoyed by users.
目前現有的部分飛機或是長途巴士提供了乘客之個人影音系統,讓每個乘客自由的選擇欲收看的內容。而這樣的影音系統之影音資料來源是預先儲存之影音檔案以及如同上述接收數位電視廣播信號。目前現有技術中接收數位電視廣播信號並傳送給各個乘客的作法幾種作法。最簡單的作法為利用一台數位電視轉換盒(Set-Top Box,STB),接收單一節目,透過AV端子(Composite video conneetor)等連接方式傳送給乘客觀看。但這樣的作法之缺點在於,同時只能發送一個節目,乘客無法自由的選擇欲收看的節目。以及,AV端子佈線雖較為容易,但會將接收到畫質上的限制,以及信號衰減的問題。 At present, some existing aircraft or long-distance buses provide passengers' personal audio and video systems, allowing each passenger to freely choose what he wants to watch. The source of audio and video data of such a video system is a pre-stored video file and a digital television broadcast signal as described above. At present, there are several practices in the prior art for receiving digital television broadcast signals and transmitting them to individual passengers. The easiest way to do this is to use a digital TV set-box (STB) to receive a single program and transmit it to the passengers via a connection such as an AV terminal (Composite video conneetor). However, the disadvantage of this approach is that only one program can be sent at the same time, and passengers are not free to choose the program they want to watch. Moreover, although the AV terminal wiring is relatively easy, it will receive the limitation of image quality and the problem of signal attenuation.
現有技術亦有對應上述之缺點進行改善的方法。例如,可以為每個乘客配置一台數位電視轉換盒,並且讓這些數位電視轉換盒共用接收天線。但這樣的設置成本非常高昂,並且會造成非常複雜的配線。較為折衷的作法則為預設收看的頻道數,針對這些收看頻道分別設置一台數位電視轉換盒,但這麼一來影像內容仍然因為透過AV端子傳送而畫質低落。若是用相同於上述之的設置改為使用高清晰度多媒體介面(High Definition Multimedia Interface,HDMI)傳送以改善畫質,HDMI連接線的一對一特性又會造成複雜的配線。 The prior art also has methods for improving the above disadvantages. For example, a digital television conversion box can be configured for each passenger and these digital television conversion boxes share the receiving antenna. However, such a setup is very expensive and can result in very complicated wiring. A more eclectic approach is to preset the number of channels to be watched. A digital TV conversion box is set for each of these viewing channels, but the image content is still low in quality due to transmission through the AV terminal. If the same settings as above are used instead of High Definition Multimedia Interface (HDMI) transmission to improve image quality, the one-to-one characteristics of the HDMI cable can cause complicated wiring.
另一種作法則將接收到之數位廣播信號轉以網路協 定電視(Internet Protocol Television,IPTV)以數據封包的形式傳送,然而這樣的配置方法又會有頻寬限制及建置及維護困難的缺點。 Another method is to convert the received digital broadcast signal to the network protocol. Internet Protocol Television (IPTV) is transmitted in the form of data packets. However, such a configuration method has the disadvantages of limited bandwidth and difficulty in construction and maintenance.
有鑑於此,本發明提供一種多媒體廣播系統、裝置及方法,以簡單的配置接收多個頻道及節目,傳送給系統中之各個多媒體播放器。其中,所述之裝置更具有行動接收之能力。 In view of this, the present invention provides a multimedia broadcast system, apparatus and method for receiving a plurality of channels and programs in a simple configuration and transmitting them to respective multimedia players in the system. Among them, the device is more capable of receiving actions.
本發明提供一種多媒體廣播系統,包括:複數個多媒體信號橋接器,分別接收複數個多媒體信號、分別解調複數個多媒體信號以得到複數個多媒體傳輸流,以及分別調變複數個多媒體傳輸流以得到複數個多媒體數位電視信號,其中每一多媒體傳輸流包括至少一節目,每一數位電視信號符合一數位電視廣播標準;一射頻混頻器,連接至複數個多媒體信號橋接器,該射頻混頻器接收複數個多媒體傳輸流,並輸出一數位電視射頻信號;複數個多媒體播放器,無線或有線連接至該射頻混頻器,接收該數位電視射頻信號,並根據該地面數位電視廣播(DVB-T)標準取得並播放該節目。 The present invention provides a multimedia broadcast system, comprising: a plurality of multimedia signal bridges, respectively receiving a plurality of multimedia signals, respectively demodulating a plurality of multimedia signals to obtain a plurality of multimedia transport streams, and respectively modifying a plurality of multimedia transport streams to obtain a plurality of multimedia digital television signals, wherein each multimedia transmission stream includes at least one program, each digital television signal conforms to a digital television broadcasting standard; and a radio frequency mixer is coupled to a plurality of multimedia signal bridges, the radio frequency mixer Receiving a plurality of multimedia transmission streams and outputting a digital television radio frequency signal; a plurality of multimedia players wirelessly or wiredly connected to the radio frequency mixer, receiving the digital television radio frequency signals, and according to the terrestrial digital television broadcasting (DVB-T The standard gets and plays the show.
為讓本發明之上述特徵和優點能更明顯易懂,下文特舉實施例,並配合所附圖式作詳細說明如下。 The above described features and advantages of the present invention will be more apparent from the following description.
圖1所示為根據本發明一實施例所繪示之多媒體廣播系統的系統方塊圖。請參照圖1,多媒體廣播系統10包括 多個多媒體信號橋接器101~10n、射頻混頻器(RF mixer)110及多個多媒體播放器120~12n。多個多媒體信號橋接器101~10n分別接收多個多媒體信號MS1~MSn並且分別解調多個多媒體信號MS1~MSn,得到多個多媒體傳輸流,其影音格式則為符合動態圖像專家組第二標準(Moving Picture Experts Group,MPEG-2)中所規範的傳輸串流格式(Transport Stream,TS),接著多個多媒體傳輸流被調變成多個多媒體數位電視信號MTV1~MTVn。 FIG. 1 is a system block diagram of a multimedia broadcast system according to an embodiment of the invention. Referring to FIG. 1, the multimedia broadcast system 10 includes A plurality of multimedia signal bridges 101~10n, a radio frequency mixer (RF mixer) 110 and a plurality of multimedia players 120~12n. The plurality of multimedia signal bridges 101~10n respectively receive the plurality of multimedia signals MS1~MSn and respectively demodulate the plurality of multimedia signals MS1~MSn to obtain a plurality of multimedia transmission streams, and the audio and video formats thereof are in accordance with the second group of the dynamic image expert group. A Transport Stream (TS) format as specified in the Moving Picture Experts Group (MPEG-2), and then a plurality of multimedia transport streams are modulated into a plurality of multimedia digital television signals MTV1 to MTVn.
於此實施例,多媒體信號MS1~MSn符合一數位電視廣播標準,包括衛星數位電視廣播(Digital Video Broadcasting-Satellite,DVB-S)標準、數位衛星服務(Digital Satellite Service,DSS)標準、地面數位電視廣播(Digital Video Broadcasting-Terrestrial,DVB-T)標準、地面綜合數位服務廣播(Integrated Services Digital Broadcasting-Terrestrial,ISDB-T)標準、地面數位電視多媒體廣播(Digital Terrestrial Multimedia Broadcast,DTMB)標準或進階電視標準委員會(Advanced Television Systems Committee,ATSC)標準,多媒體數位電視信號MTV1~MTVn則符合地面數位電視廣播(DVB-T)標準、有線數位電視廣播(Digital Video Broadcasting-Cable,DVB-C)標準、正交振幅調變(Quadrature Amplitude Modulation,QAM)標準、地面綜合數位服務廣播(ISDB-T)標準、地面數位電視多媒體廣播(DTMB)標準或進階電視標準委員會(ATSC)標準,但本發明並不限定於上述實施方式。 In this embodiment, the multimedia signals MS1~MSn conform to a digital television broadcasting standard, including a Digital Video Broadcasting-Satellite (DVB-S) standard, a Digital Satellite Service (DSS) standard, and a terrestrial digital television. Broadcast (Digital Video Broadcasting-Terrestrial, DVB-T) standard, Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) standard, Digital Terrestrial Multimedia Broadcast (DTMB) standard or advanced The Advanced Television Systems Committee (ATSC) standard, multimedia digital television signals MTV1~MTVn comply with the terrestrial digital television broadcasting (DVB-T) standard, the Digital Video Broadcasting-Cable (DVB-C) standard. Quadrature Amplitude Modulation (QAM) standard, Terrestrial Integrated Digital Service Broadcasting (ISDB-T) standard, Terrestrial Digital Television Multimedia Broadcasting (DTMB) standard or Advanced Television Standards Committee (ATSC) standard, but the present invention It is not limited to the above embodiment.
多個多媒體信號MS1~MSn分別對應於多個頻道(Channel),n可為一地區所可接收到的數位電視廣播信號的總頻道數,亦可由實際狀況進行調整增減。另外,所述一個頻道中包括至少一節目(Program),也就是一電視台於同一頻道中同時發送的一或多個節目。 The plurality of multimedia signals MS1~MSn respectively correspond to a plurality of channels, and n can be the total number of channels of the digital television broadcast signals receivable by a region, and can also be adjusted by the actual situation. In addition, the one channel includes at least one program, that is, one or more programs simultaneously transmitted by a television station in the same channel.
射頻混頻器110連接多媒體信號橋接器101~10n,並從媒體信號橋接器101~10n接收多個多媒體數位電視信號MTV1~MTVn。射頻混頻器110將多路多媒體數位電視信號MTV1~MTVn混合成一路輸出,即射頻混頻器110將多個多媒體數位電視信號MTV1~MTVn混合成一數位電視射頻信號,其包含一或多個頻道CH1~CHk。其中,。另外,k值即為多媒體數位電視信號MTV1~MTVn中所有節目的總數。 The RF mixer 110 is connected to the multimedia signal bridges 101~10n and receives a plurality of multimedia digital television signals MTV1~MTVn from the media signal bridges 101~10n. The RF mixer 110 mixes the multi-channel digital television signals MTV1~MTVn into one output, that is, the RF mixer 110 mixes the plurality of multimedia digital television signals MTV1~MTVn into one digital television radio frequency signal, which includes one or more channels. CH1~CHk. among them,. In addition, the k value is the total number of all programs in the multimedia digital television signals MTV1 to MTVn.
多媒體播放器120~12p連接至射頻混頻器110,接收一或多個頻道CH1~CHk,並且根據數位影像廣播標準分別播放頻道CH1~CHk其中之一的內容。其中,p的數量隨實際狀況而設定。例如,當多媒體廣播系統10設置於交通工具上時,p的大小則對應於乘客座位之數量。 The multimedia players 120~12p are connected to the RF mixer 110, receive one or more channels CH1~CHk, and play the contents of one of the channels CH1~CHk according to the digital video broadcasting standard. Among them, the number of p is set according to the actual situation. For example, when the multimedia broadcast system 10 is placed on a vehicle, the size of p corresponds to the number of passenger seats.
多媒體信號橋接器101~10n可接收同一類型之數位電視廣播信號,亦可分別接收不同類型的數位電視廣播信號,其中多媒體信號橋接器101~10n分別隨著接收的多媒體信號MS1~MSn的種類而有不同的設置方式。圖2所示為根據本發明一實施例所繪示之多媒體信號橋接器的功能方塊圖。請參照圖2,在本實施例中,多媒體信號MS1則 為一數位電視廣播信號,例如符合衛星數位電視廣播標準(DVB-S)的數位電視廣播信號。 The multimedia signal bridges 101~10n can receive the same type of digital television broadcast signals, and can also receive different types of digital television broadcast signals respectively, wherein the multimedia signal bridges 101~10n respectively follow the type of the received multimedia signals MS1~MSn. There are different ways to set it up. FIG. 2 is a functional block diagram of a multimedia signal bridge according to an embodiment of the invention. Referring to FIG. 2, in this embodiment, the multimedia signal MS1 is A digital television broadcast signal, such as a digital television broadcast signal conforming to the Satellite Digital Television Broadcasting Standard (DVB-S).
多媒體信號橋接器201包括碟型天線單元2010、調頻解調器2011及調變器2012。碟型天線單元2010,具有自動定向之功能,得以持續於具有最高天線增益的方向接收多媒體信號MS1。在另一實施例中,碟型天線單元2010則以一平面相位陣列(Flat Phased-Array)天線單元取代,本發明並不限定於上述實施方式。調頻解調器2011連接碟型天線單元2010,調整接收多媒體信號MS1的頻率,從碟型天線單元2010接收多媒體信號MS1,並解調多媒體信號MS1而得到多媒體傳輸流,調變器2012將該多媒體傳輸流調變後產生多媒體數位電視信號MTV1。 The multimedia signal bridge 201 includes a dish antenna unit 2010, an FM demodulator 2011, and a modulator 2012. The dish antenna unit 2010 has an automatic orientation function to receive the multimedia signal MS1 in the direction with the highest antenna gain. In another embodiment, the dish antenna unit 2010 is replaced by a flat phased-array antenna unit, and the present invention is not limited to the above embodiment. The FM demodulator 2011 is connected to the dish antenna unit 2010, adjusts the frequency of the received multimedia signal MS1, receives the multimedia signal MS1 from the dish antenna unit 2010, and demodulates the multimedia signal MS1 to obtain a multimedia transmission stream, and the modulator 2012 uses the multimedia The multimedia stream television signal MTV1 is generated after the transmission stream is modulated.
另一方面,由於在移動中接收數位電視廣播信號易因移動速度方向與信號源的相對位置改變而產生都普勒效應,更易因所處地區周遭地形及建物而造成信號多重路徑的效應,空間分集(Space Diversity),或稱天線分集(antenna diversity)技術便是用以解決上述之問題。於信號接收端,空間分集利用複數個接收天線合併通過不同路徑,有著不同衰減程度及延遲程度的信號,以達成良好的接收效果。 On the other hand, since the digital television broadcast signal is easily moved during the movement due to the change of the relative position of the moving speed direction and the signal source, the Doppler effect is more likely to cause the signal multipath effect due to the surrounding terrain and the building in the area, and the space. Space Diversity, or antenna diversity, is used to solve the above problems. At the signal receiving end, spatial diversity uses a plurality of receiving antennas to merge through different paths, and signals having different degrees of attenuation and delay are used to achieve good reception.
圖3A所示為根據本發明另一實施例所繪示之多媒體信號橋接器的功能方塊圖。請參照圖3A,多媒體信號橋接器201包括附屬天線3011、主天線3013、分集合併解調器3016,及調變器3015。分集合併解調器3016連接主天線 3013及附屬天線3011,並利用天線分集技術,接收多媒體信號MS1,解調多媒體信號MS1,得到多媒體傳輸流。調變器3015連接分集合併解調器3016,調變器3015將多媒體傳輸流調變後產生多媒體數位電視信號MTV1。射頻混頻器110連接調變器3015,接收多媒體數位電視信號MTV1。其中,射頻混頻器110可參考圖1之說明,於此不再贅述。另外,分集合併解調器3016可設計成可連接兩組或兩組以上之附屬天線,可獲得更好的多媒體信號MS1之接收效果,因此附屬天線的數量可由實際狀況進行設置上的調整,本發明不限定於上述實施方式。 FIG. 3A is a functional block diagram of a multimedia signal bridge according to another embodiment of the present invention. Referring to FIG. 3A, the multimedia signal bridge 201 includes an accessory antenna 3011, a main antenna 3013, a diversity combining demodulator 3016, and a modulator 3015. The diversity combining demodulator 3016 is connected to the main antenna The 3013 and the accessory antenna 3011, and using the antenna diversity technology, receive the multimedia signal MS1, demodulate the multimedia signal MS1, and obtain a multimedia transmission stream. The modulator 3015 is coupled to the diversity combining demodulator 3016, which modulates the multimedia transport stream to produce a multimedia digital television signal MTV1. The RF mixer 110 is coupled to the modulator 3015 for receiving the multimedia digital television signal MTV1. The radio frequency mixer 110 can be referred to the description of FIG. 1 , and details are not described herein again. In addition, the diversity combining demodulator 3016 can be designed to connect two or more sets of accessory antennas, so that a better reception effect of the multimedia signal MS1 can be obtained, and thus the number of the accessory antennas can be adjusted by the actual situation. The invention is not limited to the above embodiment.
圖3B所示為根據本發明又一實施例所繪示之多媒體信號橋接器的功能方塊圖。請參照圖3B,多媒體信號橋接器201中包括附屬天線3011、附屬調頻解調器3012、主天線3013、主調頻解調器3014,及調變器3015。附屬天線3011以特定頻率接收多媒體信號MS1。其中特定頻率也就是多媒體信號MS1的發送頻率。附屬調頻解調器3012連接附屬天線3011,從附屬天線3011接收多媒體信號MS1並解調得到分集附屬輸出(Diversity Slave Output,DSO)信號。 FIG. 3B is a functional block diagram of a multimedia signal bridge according to another embodiment of the present invention. Referring to FIG. 3B, the multimedia signal bridge 201 includes an accessory antenna 3011, an auxiliary FM demodulator 3012, a main antenna 3013, a main FM demodulator 3014, and a modulator 3015. The satellite antenna 3011 receives the multimedia signal MS1 at a specific frequency. The specific frequency is also the transmission frequency of the multimedia signal MS1. The auxiliary FM demodulator 3012 is connected to the satellite antenna 3011, receives the multimedia signal MS1 from the satellite antenna 3011, and demodulates to obtain a Diversity Slave Output (DSO) signal.
主天線3013與附屬天線3011接收相同的多媒體信號MS1。主調頻解調器3014連接主天線並接收多媒體信號MS1,解調多媒體信號MS1得到主輸出信號。主調頻解調器3014利用天線分集技術,分集合併(diversity combining)分集附屬輸出信號DSO及主輸出信號,得到多媒體傳輸 流,調變器3015將多媒體傳輸流調變後產生多媒體數位電視信號MTV1。射頻混頻器110連接調變器3015,接收多媒體數位電視信號MTV1。射頻混頻器110可參考圖1之說明,於此不再贅述。 The main antenna 3013 and the satellite antenna 3011 receive the same multimedia signal MS1. The main FM demodulator 3014 is connected to the main antenna and receives the multimedia signal MS1, and demodulates the multimedia signal MS1 to obtain a main output signal. The main FM demodulator 3014 uses antenna diversity technology to divide and combine the auxiliary output signal DSO and the main output signal to obtain multimedia transmission. The stream, modulator 3015 modulates the multimedia transport stream to produce a multimedia digital television signal MTV1. The RF mixer 110 is coupled to the modulator 3015 for receiving the multimedia digital television signal MTV1. The RF mixer 110 can be referred to the description of FIG. 1, and details are not described herein again.
值得注意的是,圖3中的多媒體信號橋接器301與射頻混頻器110可個別獨立設置,亦可整合設置為一獨立裝置。當多媒體信號橋接器301與射頻混頻器110整合設置成一獨立裝置時,此獨立裝置中亦可同時設置多個多媒體信號橋接器以接收多個多媒體信號,提供更多的節目及頻道,如同圖1所示多媒體信號橋接器101~10n連接射頻混頻器110。其中,這些多媒體信號橋接器可設置成與多媒體信號橋接器201相同的設置方式,或隨其所接收之多媒體信號種類的不同進行設置上的調整,本發明並不限定於上述。 It should be noted that the multimedia signal bridge 301 and the RF mixer 110 in FIG. 3 may be separately and independently arranged, or may be integrated into a single device. When the multimedia signal bridge 301 and the radio frequency mixer 110 are integrated into a single device, a plurality of multimedia signal bridges can be simultaneously set in the independent device to receive a plurality of multimedia signals to provide more programs and channels, as shown in the figure. The multimedia signal bridges 101 to 10n shown in FIG. 1 are connected to the radio frequency mixer 110. The multimedia signal bridges may be arranged in the same manner as the multimedia signal bridge 201, or may be adjusted according to the type of the multimedia signal received by the multimedia signal bridge 201, and the present invention is not limited to the above.
圖4所示為根據本發明一實施例所繪示之多媒體廣播系統的系統方塊圖。其中,本實施例中各元件之耦接關係與圖1相同,因此在此則不贅述。請參照圖4,多媒體信號橋接器401~403分別接收不同的數位電視廣播信號。在本實施例中多媒體信號橋接器401用以接收符合DVB-S/DSS標準之衛星數位電視廣播信號,也就是多媒體信號MS10。而多媒體信號橋接器402及多媒體信號橋接器403則接收多媒體信號MS11及多媒體信號MS12,其中多媒體信號MS11及多媒體信號MS12皆為符合DVB-T、ISDB-T、DTMB或ATSC的數位電視廣播信號。 FIG. 4 is a block diagram of a system of a multimedia broadcast system according to an embodiment of the invention. The coupling relationship of the components in this embodiment is the same as that of FIG. 1 and therefore will not be described herein. Referring to FIG. 4, the multimedia signal bridges 401 to 403 respectively receive different digital television broadcast signals. In this embodiment, the multimedia signal bridge 401 is configured to receive a satellite digital television broadcast signal conforming to the DVB-S/DSS standard, that is, the multimedia signal MS10. The multimedia signal bridge 402 and the multimedia signal bridge 403 receive the multimedia signal MS11 and the multimedia signal MS12, wherein the multimedia signal MS11 and the multimedia signal MS12 are digital television broadcast signals conforming to DVB-T, ISDB-T, DTMB or ATSC.
多媒體信號橋接器401的碟型天線單元4011接收多媒體信號MS10後,調頻解調器4012將多媒體信號MS10解調成多媒體傳輸流,調變器4014將多媒體傳輸流調變成多媒體數位電視信號MTV1,然後輸出至射頻混頻器410。 After the dish antenna unit 4011 of the multimedia signal bridge 401 receives the multimedia signal MS10, the FM demodulator 4012 demodulates the multimedia signal MS10 into a multimedia transmission stream, and the modulator 4014 converts the multimedia transmission stream into a multimedia digital television signal MTV1, and then Output to the RF mixer 410.
多媒體信號橋接器402具有針對移動接收所設置的天線分集技術,詳細說明可參照圖3A或圖3B所繪示之實施例。而多媒體信號橋接器403則僅透過天線4031接收多媒體信號MS12,並由連接至天線的調頻解調器4032解調多媒體信號MS12,得到多媒體傳輸流,多媒體傳輸流再經過調變器4034的調變,得到多媒體數位電視信號MTV3。 The multimedia signal bridge 402 has an antenna diversity technique set for mobile reception, and the embodiment illustrated in FIG. 3A or FIG. 3B can be described in detail. The multimedia signal bridge 403 receives the multimedia signal MS12 only through the antenna 4031, and demodulates the multimedia signal MS12 by the FM demodulator 4032 connected to the antenna to obtain a multimedia transmission stream, and the multimedia transmission stream is modulated by the modulator 4034. , get the multimedia digital TV signal MTV3.
請繼續參照圖4,在本實施例中多媒體廣播系統40更包括了多媒體伺服器404。多媒體伺服器404連接射頻混頻器410,其中儲存多種影音內容,例如影片、靜態影像、音樂,或是從符合美國國家電視標準委員會制式(National Television System Committee,NTSC)或逐行倒相制式(Phase Alternating Line,PAL)的類比電視廣播信號所接收的影像內容。 With continued reference to FIG. 4, the multimedia broadcast system 40 further includes a multimedia server 404 in this embodiment. The multimedia server 404 is coupled to the RF mixer 410, which stores a variety of audio and video content, such as movies, still images, music, or from the National Television System Committee (NTSC) or the progressive phase-inversion system ( Phase Alternating Line, PAL) The image content received by an analog TV broadcast signal.
多媒體伺服器404將所儲存的影音內容整理成一或多個節目,例如同一類型之電影輪播或搭配音樂之相片輪放等,並編碼壓縮成與前述多媒體傳輸流相同格式。調變器406接著將多媒體傳輸流調變成多媒體數位電視信號MTV4後送至射頻混頻器410,以便射頻混頻器410處理。在本實施例中,多媒體傳輸流皆符合MPEG-2標準中的傳輸串流格式,但本發明並不限定於上述實施方式。 The multimedia server 404 organizes the stored video and audio content into one or more programs, such as a movie carousel of the same type or a photo wheel with music, and the like is compressed into the same format as the aforementioned multimedia transport stream. The modulator 406 then tunes the multimedia transport stream into a multimedia digital television signal MTV4 and sends it to the RF mixer 410 for processing by the RF mixer 410. In the present embodiment, the multimedia transport stream conforms to the transport stream format in the MPEG-2 standard, but the present invention is not limited to the above embodiment.
射頻混頻器410接收多媒體數位電視訊號MTV1~MTV4,並將其複合在單一同軸電纜(或天線)而輸出一數位電視射頻信號,數位電視射頻信號包含一或多個頻道CH1~CHk。值得注意的是,由於在本實施例中的多媒體傳輸流皆為MPEG-2中的傳輸串流格式,在重新調變為符合DVB-T、DVB-C、QAM、ISDB-T、DTMB或ATSC標準的多媒體數位電視信號MTV1~MTV4前,不需進行轉換影音格式及編碼之方式。 The radio frequency mixer 410 receives the multimedia digital television signals MTV1~MTV4 and combines them on a single coaxial cable (or antenna) to output a digital television radio frequency signal, and the digital television radio frequency signal includes one or more channels CH1~CHk. It is worth noting that since the multimedia transport stream in this embodiment is a transport stream format in MPEG-2, it is re-tuned to conform to DVB-T, DVB-C, QAM, ISDB-T, DTMB or ATSC. Before the standard multimedia digital TV signal MTV1~MTV4, there is no need to convert the video format and encoding.
然而在另一實施例中,多媒體傳輸流的影音格式與數位影像廣播標準中的影音格式要求不符時,調變器4014,4026,4034,406中更包括一轉換單元(未繪示),轉換多媒體傳輸流中各個節目的影音格式成符合數位電視廣播標準的影音格式要求後,調變器4014,4026,4034,406再將多媒體傳輸流中的各個節目調變成多媒體數位電視信號MTV1~MTV4。 However, in another embodiment, when the audio and video format of the multimedia transport stream does not match the video format requirement in the digital video broadcast standard, the modulators 4014, 4026, 4034, 406 further include a converting unit (not shown), and convert After the audio and video formats of the respective programs in the multimedia transmission stream are in accordance with the audio and video format requirements of the digital television broadcasting standard, the modulators 4014, 4026, 4034, 406 then convert the respective programs in the multimedia transmission stream into multimedia digital television signals MTV1 to MTV4.
請繼續參照圖4,多媒體播放器421包括解調器4211、影音解碼器4212、顯示單元4213以及頻道切換單元4214。解調器4211接收來自射頻混頻器410的數位電視射頻信號之頻道CH1~CHk的其中之一,標示為CHi,並根據DVB標準解調頻道CHi為頻道傳輸流CS。影音解碼器4212連接解調器4211,接收頻道傳輸流CS並解碼頻道傳輸流CS為影音資料VC。輸出單元4213則連接影音解碼器4212,接收影音資料VC並顯示播放影音資料VC。頻道切換單元4214則連接解調器4214,接收操作信號OP (例如,由使用者選擇頻道所產生),並根據操作信號OP控制解調器4211切換頻道(頻道CH1~CHk其中之一)。 Referring to FIG. 4, the multimedia player 421 includes a demodulator 4211, a video decoder 4212, a display unit 4213, and a channel switching unit 4214. The demodulator 4211 receives one of the channels CH1 to CHk of the digital television radio frequency signal from the radio frequency mixer 410, denoted as CHi, and demodulates the channel CHi as the channel transport stream CS according to the DVB standard. The video decoder 4212 is connected to the demodulator 4211, receives the channel transport stream CS and decodes the channel transport stream CS into the video material VC. The output unit 4213 is connected to the video decoder 4212, receives the video material VC and displays the played video material VC. The channel switching unit 4214 is connected to the demodulator 4214 to receive the operation signal OP. (For example, generated by the user selecting a channel), and controlling the demodulator 4211 to switch channels (one of the channels CH1 to CHk) according to the operation signal OP.
多媒體廣播系統40中其他的多媒體播放器422~42p則與多媒體播放器421具有相似的構件與連接關係,在此則不另贅述。但值得注意的是,多媒體播放器421~42p可透過有線或無線的方式與射頻混頻器410連接,依實際狀況進行設置。在本實施例中,由於頻道CH1~CHk以DVB-T的方式調變,即為原生適合於無線傳送之數位影像廣播標準,而透過有線傳送也僅需要簡單的以同軸電纜連接多媒體播放器421~42p連接射頻混頻器410。 The other multimedia players 422~42p in the multimedia broadcast system 40 have similar components and connection relationships with the multimedia player 421, and are not described here. However, it is worth noting that the multimedia players 421~42p can be connected to the radio frequency mixer 410 by wire or wirelessly, and set according to actual conditions. In this embodiment, since the channels CH1~CHk are modulated in a DVB-T manner, that is, a digital video broadcasting standard suitable for wireless transmission, and only a coaxial cable connection to the multimedia player 421 is required for wired transmission. ~42p is connected to the RF mixer 410.
本發明亦提供了一種多媒體廣播方法。圖5為根據本發明一實施例所繪示多媒體廣播方法的步驟流程圖。請參照圖5,首先,在步驟S101時,接收多個多媒體信號,並且分別解調多個多媒體信號以得到多個多媒體傳輸流,其中多個多媒體信號符合衛星數位電視廣播(DVB-S/DSS)或地面數位電視廣播(DVB-T/ISDB-T/DTMB/ATSC)標準,而多個多媒體傳輸流分別包括一或多個節目。接著在步驟S102時,分別調變多個多媒體傳輸流,以分別產生多個多媒體數位電視信號,其中每一多媒體數位電視信號都符合數位電視廣播,即符合DVB-T,DVB-C,QAM,ISDB-T,DTMB或ATSC標準之其中之一。然後在步驟S103時,射頻混頻多個多媒體數位電視信號,產生數位電視射頻信號。本方法的詳細實施方式則可參照上述之實施例的說明,在此則不另贅述。 The invention also provides a multimedia broadcasting method. FIG. 5 is a flow chart showing the steps of a multimedia broadcast method according to an embodiment of the invention. Referring to FIG. 5, first, at step S101, a plurality of multimedia signals are received, and a plurality of multimedia signals are respectively demodulated to obtain a plurality of multimedia transmission streams, wherein the plurality of multimedia signals conform to satellite digital television broadcasting (DVB-S/DSS) Or terrestrial digital television broadcasting (DVB-T/ISDB-T/DTMB/ATSC) standards, and multiple multimedia transmission streams each include one or more programs. Then, in step S102, the plurality of multimedia transport streams are respectively modulated to generate a plurality of multimedia digital television signals, wherein each of the multimedia digital television signals conforms to the digital television broadcast, that is, conforms to DVB-T, DVB-C, QAM, One of the ISDB-T, DTMB or ATSC standards. Then, in step S103, the radio frequency mixes the plurality of multimedia digital television signals to generate a digital television radio frequency signal. For detailed implementation of the method, reference may be made to the description of the above embodiments, and no further details are provided herein.
綜上所述,本發明提供了一種多媒體廣播系統、方法與其裝置,利用多個多媒體信號橋接器接收多個數位電視頻道的信號,以台灣的數位電視廣播為例,第一多媒體信號橋接器接收533MHz之中視頻道,其中有三個電視節目;第二多媒體信號橋接器接收545MHz之公視頻道,其中有三個電視節目;第三多媒體信號橋接器接收557MHz之民視頻道,其中有四個電視節目;第五多媒體信號橋接器接收569MHz之公視頻道,其中有一個高畫質(HD)電視節目;第六多媒體信號橋接器接收581MHz之台視頻道,其中有三個電視節目及一個廣播節目;第七多媒體信號橋接器接收597MHz之華視頻道,其中有三個電視節目。多媒體信號橋接器並將各個頻道中的所有節目重新調變並發送給系統中的每個使用者。 In summary, the present invention provides a multimedia broadcast system, method and apparatus thereof, which use multiple multimedia signal bridges to receive signals of a plurality of digital television channels. Taking digital television broadcasting in Taiwan as an example, the first multimedia signal is bridged. The device receives a video channel of 533 MHz, wherein there are three television programs; the second multimedia signal bridge receives a public video channel of 545 MHz, wherein there are three television programs; and the third multimedia signal bridge receives a video channel of 557 MHz, wherein There are four TV programs; the fifth multimedia signal bridge receives the 569MHz public video channel, which has a high-definition (HD) TV program; the sixth multimedia signal bridge receives the 581MHz video channel, three of which A TV program and a broadcast program; the seventh multimedia signal bridge receives a 597 MHz video channel, of which there are three television programs. The multimedia signal bridge re-modulates and transmits all the programs in each channel to each user in the system.
另外,若多媒體信號橋接器已使用天線分集技術,則使用者的多媒體播放器只需要具備一般天線卻仍可於移動中獲得良好的信號品質,大幅的降低了系統建置之成本。使用者的多媒體播放器更可透過無線或有線的方式接收多個相同於原始電視台發送信號之高畫質的頻道,保持了使用者的觀賞品質更同時避免了複雜的配線問題。雖本發明主要針對於運用於交通工具上的多媒體廣播系統,但本發明亦可應用於旅館、大型公共建築等場合的多媒體系統建置,並在這些場合的應用上亦具有上述的眾多優點。 In addition, if the multimedia signal bridge has used the antenna diversity technology, the user's multimedia player only needs to have a general antenna but still obtains good signal quality on the mobile, which greatly reduces the cost of system construction. The user's multimedia player can receive multiple high-quality channels that are the same as the original TV station's transmission signal through wireless or wired, which maintains the user's viewing quality while avoiding complicated wiring problems. Although the present invention is mainly directed to a multimedia broadcasting system applied to a vehicle, the present invention can also be applied to the construction of a multimedia system in a hotel, a large public building, and the like, and has the above-mentioned numerous advantages in the application of these occasions.
雖然本發明已以實施例揭露如上,然其並非用以限定本發明,任何所屬技術領域中具有通常知識者,在不脫離 本發明之精神和範圍內,當可作些許之更動與潤飾,故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。 Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art does not deviate. In the spirit and scope of the present invention, the scope of protection of the present invention is defined by the scope of the appended claims.
10、40‧‧‧多媒體廣播系統 10, 40‧‧‧Multimedia Broadcasting System
101~10n、201、401~403‧‧‧多媒體信號橋接器 101~10n, 201, 401~403‧‧‧Multimedia signal bridge
110、410‧‧‧射頻混頻器 110,410‧‧‧RF mixer
120~12p、421~42p‧‧‧多媒體播放器 120~12p, 421~42p‧‧‧Multimedia player
2010、4011‧‧‧碟型天線單元 2010, 4011‧‧‧ dish antenna unit
2011、4032‧‧‧調頻解調器 2011, 4032‧‧ ‧ FM demodulator
2012、3015、406、4014、4026、4034‧‧‧調變器 2012, 3015, 406, 4014, 4026, 4034‧‧ ‧ modulator
3011、4021‧‧‧附屬天線 3011, 4021‧‧‧Attach antenna
3016‧‧‧分集合併解調器 3016‧‧‧Divided and demodulator
3012、4022‧‧‧附屬調頻解調器 3012, 4022‧‧‧Auxiliary FM Demodulator
3014、4024‧‧‧主調頻解調器 3014, 4024‧‧‧ main FM demodulator
3013、4023‧‧‧主天線 3013, 4023‧‧‧ main antenna
4031‧‧‧天線 4031‧‧‧Antenna
404‧‧‧多媒體伺服器 404‧‧‧Multimedia server
4211‧‧‧解調器 4211‧‧‧ demodulator
4212‧‧‧影音解碼器 4212‧‧‧Video decoder
4213‧‧‧輸出單元 4213‧‧‧Output unit
4214‧‧‧頻道切換單元 4214‧‧‧Channel switching unit
CH1~CHk、CHi‧‧‧頻道 CH1~CHk, CHi‧‧ channel
CS‧‧‧頻道傳輸流 CS‧‧‧ channel transport stream
VC‧‧‧影音資料 VC‧‧‧ audio and video materials
MS1~MSn、MS10~MS12‧‧‧多媒體信號 MS1~MSn, MS10~MS12‧‧‧ multimedia signal
MTV1~MTVn‧‧‧多媒體數位電視信號 MTV1~MTVn‧‧‧Multimedia digital TV signal
DSO‧‧‧分集附屬輸出信號 DSO‧‧‧ diversity accessory output signal
OP‧‧‧操作信號 OP‧‧‧ operation signal
S101~S103‧‧‧流程步驟 S101~S103‧‧‧ Process steps
圖1所示為根據本發明一實施例所繪示之多媒體廣播系統的系統方塊圖。 FIG. 1 is a system block diagram of a multimedia broadcast system according to an embodiment of the invention.
圖2所示為根據本發明一實施例所繪示之多媒體信號橋接器的功能方塊圖。 FIG. 2 is a functional block diagram of a multimedia signal bridge according to an embodiment of the invention.
圖3A所示為根據本發明另一實施例所繪示之多媒體信號橋接器的功能方塊圖。 FIG. 3A is a functional block diagram of a multimedia signal bridge according to another embodiment of the present invention.
圖3B所示為根據本發明另一實施例所繪示之多媒體信號橋接器的功能方塊圖。 FIG. 3B is a functional block diagram of a multimedia signal bridge according to another embodiment of the present invention.
圖4所示為根據本發明一實施例所繪示之多媒體廣播系統的系統方塊圖。 FIG. 4 is a block diagram of a system of a multimedia broadcast system according to an embodiment of the invention.
圖5為根據本發明一實施例所繪示多媒體廣播方法的步驟流程圖。 FIG. 5 is a flow chart showing the steps of a multimedia broadcast method according to an embodiment of the invention.
10‧‧‧多媒體廣播系統 10‧‧‧Multimedia Broadcasting System
101~10n‧‧‧多媒體信號橋接器 101~10n‧‧‧Multimedia Signal Bridge
110‧‧‧射頻混頻器 110‧‧‧RF Mixer
120~12p‧‧‧多媒體播放器 120~12p‧‧‧Multimedia player
CH1~CHk‧‧‧頻道 CH1~CHk‧‧ Channel
MS1~MSn‧‧‧多媒體信號 MS1~MSn‧‧‧Multimedia signal
MTV1~MTVn‧‧‧多媒體數位電視信號 MTV1~MTVn‧‧‧Multimedia digital TV signal
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TW101117447A TWI523522B (en) | 2012-05-16 | 2012-05-16 | System of multimedia brocasting, method and apparatus thereof |
CN2012102082350A CN103428455A (en) | 2012-05-16 | 2012-06-19 | Multimedia broadcasting system, method and device |
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TW101117447A TWI523522B (en) | 2012-05-16 | 2012-05-16 | System of multimedia brocasting, method and apparatus thereof |
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TWI523522B true TWI523522B (en) | 2016-02-21 |
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