TW201301890A - Signal transmitting apparatus and transmitter and receiver thereof - Google Patents
Signal transmitting apparatus and transmitter and receiver thereof Download PDFInfo
- Publication number
- TW201301890A TW201301890A TW100122483A TW100122483A TW201301890A TW 201301890 A TW201301890 A TW 201301890A TW 100122483 A TW100122483 A TW 100122483A TW 100122483 A TW100122483 A TW 100122483A TW 201301890 A TW201301890 A TW 201301890A
- Authority
- TW
- Taiwan
- Prior art keywords
- differential
- pair
- signals
- pass
- signal
- Prior art date
Links
Landscapes
- Amplifiers (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
本發明係與訊號傳輸有關,特別是關於一種訊號傳輸裝置及其傳送器與接收器,無需額外設置處理或解碼元件,即可透過具有不同頻率之濾波器合成聲音與影像訊號且兩者之間並不會彼此干擾。The present invention relates to signal transmission, and more particularly to a signal transmission device and its transmitter and receiver, which can synthesize sound and video signals through filters having different frequencies without additional processing or decoding components. Does not interfere with each other.
近年來,多媒體影音技術發展得相當迅速。舉例而言,能夠整合聲音及影像一起傳輸的高解析度多媒體介面(High-Definition Multimedia Interface,HDMI)或數位視訊介面(Digital Visual Interface,DVI),由於其係透過同一纜線傳遞無壓縮的音頻訊號及具有高分辨率的視頻訊號,不需進行類比訊號轉換成數位訊號(A/D)或是數位訊號轉換成類比訊號(D/A)之程序,故可達到無失真輸出之目標。In recent years, multimedia audio and video technology has developed quite rapidly. For example, a high-definition multimedia interface (HDMI) or a digital video interface (DVI) that can transmit sound and video together, because it transmits uncompressed audio through the same cable. The signal and the high-resolution video signal do not need to convert analog signals into digital signals (A/D) or digital signals into analog signals (D/A), so the target of distortion-free output can be achieved.
以HDMI的影音訊號為例,假設高解析度多媒體介面的訊號延伸器所採用的纜線是CAT-5或CAT-6雙絞線(category 5 or category 6 cable),若以1080P的最小化傳輸差分訊號(Transition Minimized Differential Signaling,TMDS)為例,由於1080P係代表畫面的垂直方向共有1080條水平掃描線,其畫面解析度為相當高的1920×1080,故其傳輸時所需之頻寬較大,約為1.65Gbps。因此,當頻率1650MHz的最小化傳輸差分訊號透過CAT-5雙絞線傳輸時,僅能傳遞約40公尺之遠,一旦高解析度多媒體介面的影音輸入端與影音輸出端之間的傳輸距離較長時,設置於影音輸入端與影音輸出端之間的訊號延伸器通常需要重複器(repeater)之設計。Taking the HDMI video signal as an example, suppose the cable extension of the high-resolution multimedia interface is CAT-5 or CAT-6 twisted pair cable (category 5 or category 6 cable), if it is minimized by 1080P. For example, the transition signal (TMDS) is a differential signal (TMDS). Since the 1080P system has 1080 horizontal scanning lines in the vertical direction of the picture, the resolution of the picture is 1920×1080, so the bandwidth required for transmission is higher. Large, about 1.65Gbps. Therefore, when the minimum transmission differential signal of the frequency of 1650MHz is transmitted through the CAT-5 twisted pair, it can only transmit about 40 meters away, once the transmission distance between the audio and video input end of the high resolution multimedia interface and the audio and video output end For a long time, the signal extender disposed between the video input and the audio output usually requires a repeater design.
由於HDMI訊號特性在高畫質的影像輸出下並無法傳輸較長的距離,並且HDMI專用的訊號線價格上相當昂貴,因此,如何使用價格較為便宜的線材進行長距離的HDMI訊號傳輸,便成為亟待克服之難題。傳統上,由於一條CAT-5或CAT-6網路線僅包含有四對差動傳輸線,但DVI或HDMI的影像訊號(TMDS)本身即需要透過四對差動傳輸線進行傳輸,而數位聲音訊號(例如SPDIF)及/或類比聲音訊號亦需承載於這四對差動傳輸線上,因此,為了實現僅在訊號延伸器的傳送器及接收器之間設置一條CAT-5網路線之目標,一般大多需額外設置訊號處理或解碼元件,例如DSP、MCU、FPGA或編碼/解碼器等,用以對TMDS影像訊號、數位聲音訊號及/或類比聲音訊號進行訊號處理之程序,以將數位聲音訊號及/或類比聲音訊號載於TMDS影像訊號上。Since the HDMI signal feature cannot transmit a long distance under high-definition video output, and the HDMI dedicated signal line is quite expensive, how to use a relatively inexpensive wire for long-distance HDMI signal transmission becomes The problem that needs to be overcome. Traditionally, since a CAT-5 or CAT-6 network route contains only four pairs of differential transmission lines, the DVI or HDMI video signal (TMDS) itself needs to be transmitted through four pairs of differential transmission lines, and digital audio signals ( For example, SPDIF) and/or analog audio signals are also required to be carried on the four pairs of differential transmission lines. Therefore, in order to achieve the goal of setting a CAT-5 network route only between the transmitter and receiver of the signal extender, most of them are generally Additional processing of signal processing or decoding components, such as DSP, MCU, FPGA, or encoder/decoder, for signal processing of TMDS video signals, digital audio signals, and/or analog audio signals, to digital audio signals and / or analog signal is contained in the TMDS video signal.
然而,上述作法不僅容易導致TMDS影像訊號與聲音訊號之間彼此干擾,並且需要耗費較多的硬體成本以及較長的訊號處理時間,嚴重地削弱了訊號延伸器之市場競爭力。However, the above method not only easily causes interference between the TMDS video signal and the audio signal, but also requires more hardware cost and longer signal processing time, which seriously weakens the market competitiveness of the signal extender.
因此,本發明提出一種訊號傳輸裝置及其傳送器與接收器,以解決先前技術所遭遇到之上述種種問題。Accordingly, the present invention is directed to a signal transmission apparatus and its transmitter and receiver to solve the above-mentioned problems encountered in the prior art.
本發明之一範疇在於提出一種訊號傳輸裝置。於一具體實施例中,訊號傳輸裝置包含傳送器、一對差動傳輸線及接收器。傳送器包含有單端/差動訊號轉換模組及具有不同通過頻段之第一濾波模組與第二濾波模組。第二濾波模組之輸入端耦接單端/差動訊號轉換模組且第二濾波模組之輸出端耦接第一濾波模組之輸出端。第一濾波模組係依照第一通過頻段對接收自影像源的一對數位差動訊號進行濾波以輸出一對濾波數位差動訊號。單端/差動訊號轉換模組將單端聲音訊號轉換為一對差動聲音訊號,再由第二濾波模組依照第二通過頻段對該對差動聲音訊號進行濾波以輸出一對濾波差動聲音訊號。該對濾波數位差動訊號與該對濾波差動聲音訊號合成為一對合成差動訊號。該對差動傳輸線耦接傳送器,用以傳輸該對合成差動訊號。One aspect of the invention is to propose a signal transmission device. In one embodiment, the signal transmission device includes a transmitter, a pair of differential transmission lines, and a receiver. The transmitter includes a single-ended/differential signal conversion module and a first filter module and a second filter module having different passbands. The input end of the second filter module is coupled to the single-ended/differential signal conversion module, and the output end of the second filter module is coupled to the output end of the first filter module. The first filter module filters the pair of digital differential signals received from the image source according to the first pass frequency band to output a pair of filtered digital differential signals. The single-ended/differential signal conversion module converts the single-ended audio signal into a pair of differential audio signals, and the second filter module filters the pair of differential audio signals according to the second passband to output a pair of differential signals. Sound signal. The pair of filtered digital differential signals and the pair of filtered differential audio signals are combined into a pair of combined differential signals. The pair of differential transmission lines are coupled to the transmitter for transmitting the pair of synthesized differential signals.
接收器自該對差動傳輸線接收該對合成差動訊號,接收器包含第三濾波模組、第四濾波模組及差動/單端訊號轉換模組。第三濾波模組之輸入端耦接第四濾波模組之輸入端,差動/單端訊號轉換模組耦接第四濾波模組之輸出端。第三濾波模組依照第一通過頻段對該對合成差動訊號進行濾波以輸出該對數位差動訊號。第四濾波模組依照第二通過頻段對該對合成差動訊號進行濾波以輸出該對差動聲音訊號,並由差動/單端訊號轉換模組將該對差動聲音訊號轉換為單端聲音訊號。The receiver receives the pair of synthesized differential signals from the pair of differential transmission lines, and the receiver includes a third filter module, a fourth filter module, and a differential/single-ended signal conversion module. The input end of the third filter module is coupled to the input end of the fourth filter module, and the differential/single-ended signal conversion module is coupled to the output end of the fourth filter module. The third filter module filters the pair of synthesized differential signals according to the first pass frequency band to output the logarithmic differential signal. The fourth filter module filters the pair of composite differential signals according to the second passband to output the pair of differential voice signals, and converts the differential voice signals into single-ended signals by the differential/single-ended signal conversion module. Sound signal.
於另一具體實施例中,訊號傳輸裝置包含傳送器、複數對差動傳輸線及接收器。傳送器包含第一濾波模組、單端/差動訊號轉換模組及第二濾波模組。第一濾波模組包含複數個高通濾波單元,用以分別對接收自影像源的複數對數位差動訊號進行高通濾波以輸出複數對高通濾波數位差動訊號。單端/差動訊號轉換模組用以將至少一單端聲音訊號轉換為至少一對差動聲音訊號。第二濾波模組包含至少一低通濾波單元,其輸入端耦接單端/差動訊號轉換模組且其輸出端耦接第一濾波模組之輸出端。該至少一低通濾波單元對該至少一對差動聲音訊號進行低通濾波以輸出至少一對低通濾波差動聲音訊號,致使該至少一對低通濾波差動聲音訊號合成至該複數對高通濾波數位差動訊號之至少一對高通濾波數位差動訊號,以形成複數對合成差動訊號。複數對差動傳輸線耦接傳送器,用以傳輸該複數對合成差動訊號。In another embodiment, the signal transmission device includes a transmitter, a complex pair of differential transmission lines, and a receiver. The transmitter includes a first filter module, a single-ended/differential signal conversion module, and a second filter module. The first filter module includes a plurality of high-pass filter units for high-pass filtering the complex logarithmic differential signals received from the image source to output a complex pair of high-pass filtered digital differential signals. The single-ended/differential signal conversion module is configured to convert at least one single-ended audio signal into at least one pair of differential audio signals. The second filter module includes at least one low-pass filter unit, and the input end is coupled to the single-ended/differential signal conversion module and the output end thereof is coupled to the output end of the first filter module. The at least one low pass filtering unit performs low pass filtering on the at least one pair of differential audio signals to output at least one pair of low pass filtered differential audio signals, such that the at least one pair of low pass filtered differential audio signals are synthesized to the complex pair The high pass filters at least one pair of high pass filtered digital differential signals of the digital differential signals to form a complex pair of synthesized differential signals. The complex pair of differential transmission lines are coupled to the transmitter for transmitting the complex pair of synthesized differential signals.
接收器包含第三濾波模組、第四濾波模組及差動/單端訊號轉換模組。第三濾波模組包含該複數個高通濾波單元,用以分別對該複數對合成差動訊號進行高通濾波以還原出該複數對數位差動訊號,並輸出至影像顯示裝置。第四濾波模組包含該至少一低通濾波單元,其輸入端耦接第三濾波模組之輸入端。該至少一低通濾波單元對該複數對合成差動訊號進行低通濾波以還原出該至少一對差動聲音訊號。差動/單端訊號轉換模組耦接第四濾波模組之輸出端,用以將該至少一對差動聲音訊號轉換為該至少一單端聲音訊號。The receiver includes a third filter module, a fourth filter module, and a differential/single-ended signal conversion module. The third filter module includes the plurality of high-pass filter units for performing high-pass filtering on the complex-pair composite differential signals to restore the complex logarithmic differential signals, and outputting the signals to the image display device. The fourth filter module includes the at least one low-pass filter unit, and the input end is coupled to the input end of the third filter module. The at least one low pass filtering unit low pass filters the complex pair of synthesized differential signals to restore the at least one pair of differential audio signals. The differential/single-ended signal conversion module is coupled to the output end of the fourth filter module for converting the at least one pair of differential audio signals into the at least one single-ended audio signal.
本發明之另一範疇在於提出一種傳送器。於一具體實施例中,傳送器係應用於訊號傳輸裝置。傳送器包含有單端/差動訊號轉換模組及具有不同通過頻段之第一濾波模組與第二濾波模組。第二濾波模組之輸入端耦接單端/差動訊號轉換模組且第二濾波模組之輸出端耦接第一濾波模組之輸出端。第一濾波模組係依照第一通過頻段對接收自影像源的一對數位差動訊號進行濾波以輸出一對濾波數位差動訊號。單端/差動訊號轉換模組將單端聲音訊號轉換為一對差動聲音訊號,再由第二濾波模組依照第二通過頻段對該對差動聲音訊號進行濾波以輸出一對濾波差動聲音訊號。該對濾波數位差動訊號與該對濾波差動聲音訊號合成為一對合成差動訊號。Another aspect of the invention is to propose a conveyor. In one embodiment, the transmitter is applied to a signal transmission device. The transmitter includes a single-ended/differential signal conversion module and a first filter module and a second filter module having different passbands. The input end of the second filter module is coupled to the single-ended/differential signal conversion module, and the output end of the second filter module is coupled to the output end of the first filter module. The first filter module filters the pair of digital differential signals received from the image source according to the first pass frequency band to output a pair of filtered digital differential signals. The single-ended/differential signal conversion module converts the single-ended audio signal into a pair of differential audio signals, and the second filter module filters the pair of differential audio signals according to the second passband to output a pair of differential signals. Sound signal. The pair of filtered digital differential signals and the pair of filtered differential audio signals are combined into a pair of combined differential signals.
於另一具體實施例中,傳送器包含第一濾波模組、單端/差動訊號轉換模組及第二濾波模組。第一濾波模組包含複數個高通濾波單元,用以分別對接收自影像源的複數對數位差動訊號進行高通濾波以輸出複數對高通濾波數位差動訊號。單端/差動訊號轉換模組用以將至少一單端聲音訊號轉換為至少一對差動聲音訊號。第二濾波模組包含至少一低通濾波單元,其輸入端耦接單端/差動訊號轉換模組且其輸出端耦接第一濾波模組之輸出端。該至少一低通濾波單元對該至少一對差動聲音訊號進行低通濾波以輸出至少一對低通濾波差動聲音訊號,致使該至少一對低通濾波差動聲音訊號合成至該複數對高通濾波數位差動訊號之至少一對高通濾波數位差動訊號,以形成複數對合成差動訊號。In another embodiment, the transmitter includes a first filter module, a single-ended/differential signal conversion module, and a second filter module. The first filter module includes a plurality of high-pass filter units for high-pass filtering the complex logarithmic differential signals received from the image source to output a complex pair of high-pass filtered digital differential signals. The single-ended/differential signal conversion module is configured to convert at least one single-ended audio signal into at least one pair of differential audio signals. The second filter module includes at least one low-pass filter unit, and the input end is coupled to the single-ended/differential signal conversion module and the output end thereof is coupled to the output end of the first filter module. The at least one low pass filtering unit performs low pass filtering on the at least one pair of differential audio signals to output at least one pair of low pass filtered differential audio signals, such that the at least one pair of low pass filtered differential audio signals are synthesized to the complex pair The high pass filters at least one pair of high pass filtered digital differential signals of the digital differential signals to form a complex pair of synthesized differential signals.
本發明之另一範疇在於提出一種接收器。於一具體實施例中,接收器係應用於訊號傳輸裝置。接收器用以接收一對合成差動訊號,該對合成差動訊號係由一對數位差動訊號與一對差動聲音訊號合成。接收器包含第一濾波模組、第二濾波模組及差動/單端訊號轉換模組。第一濾波模組之輸入端耦接第二濾波模組之輸入端,差動/單端訊號轉換模組耦接第二濾波模組之輸出端。第一濾波模組依照第一通過頻段對該對合成差動訊號進行濾波以輸出該對數位差動訊號。第二濾波模組依照第二通過頻段對該對合成差動訊號進行濾波以輸出該對差動聲音訊號,並由差動/單端訊號轉換模組將該對差動聲音訊號轉換為單端聲音訊號。Another aspect of the invention is to propose a receiver. In one embodiment, the receiver is applied to a signal transmission device. The receiver is configured to receive a pair of synthesized differential signals, and the pair of synthesized differential signals are synthesized by a pair of digital differential signals and a pair of differential voice signals. The receiver includes a first filter module, a second filter module, and a differential/single-ended signal conversion module. The input end of the first filter module is coupled to the input end of the second filter module, and the differential/single-ended signal conversion module is coupled to the output end of the second filter module. The first filter module filters the pair of synthesized differential signals according to the first pass frequency band to output the logarithmic differential signal. The second filter module filters the pair of combined differential signals according to the second passband to output the pair of differential voice signals, and converts the pair of differential voice signals into single-ended by the differential/single-ended signal conversion module. Sound signal.
於另一具體實施例中,接收器包含第一濾波模組、第二濾波模組及差動/單端訊號轉換模組。第一濾波模組包含複數個高通濾波單元,用以分別對該複數對合成差動訊號進行高通濾波以還原出該複數對數位差動訊號,並輸出至影像顯示裝置。第二濾波模組包含至少一低通濾波單元,其輸入端耦接第一濾波模組之輸入端。至少一低通濾波單元對該複數對合成差動訊號進行低通濾波以還原出該至少一對差動聲音訊號。差動/單端訊號轉換模組耦接第二濾波模組之輸出端,用以將該至少一對差動聲音訊號轉換為至少一單端聲音訊號。In another embodiment, the receiver includes a first filter module, a second filter module, and a differential/single-ended signal conversion module. The first filter module includes a plurality of high-pass filter units for performing high-pass filtering on the complex-pair composite differential signals to restore the complex logarithmic differential signals, and outputting the signals to the image display device. The second filter module includes at least one low-pass filter unit, and an input end thereof is coupled to the input end of the first filter module. The at least one low pass filtering unit performs low pass filtering on the complex pair of synthesized differential signals to restore the at least one pair of differential audio signals. The differential/single-ended signal conversion module is coupled to the output end of the second filter module for converting the at least one pair of differential audio signals into at least one single-ended audio signal.
關於本發明之優點與精神可以藉由以下的發明詳述及所附圖式得到進一步的瞭解。The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.
根據本發明之一較佳具體實施例為一種訊號傳輸裝置。實際上,訊號傳輸裝置可以是影音訊號延伸器或影音切換器,並係應用於能夠整合聲音及影像一起傳輸的高解析度多媒體介面或者是傳輸鍵盤-滑鼠-監視器切換器(KVM switch),但不以此為限。由於高解析度多媒體介面係透過同一網路線傳遞無壓縮的音頻訊號及具有高分辨率的視頻訊號,不需進行類比訊號轉換成數位訊號(A/D)或是數位訊號轉換成類比訊號(D/A)之程序,故可達到無失真輸出之目標。A preferred embodiment of the present invention is a signal transmission device. In fact, the signal transmission device can be an audio/video extender or a video switcher, and is applied to a high-resolution multimedia interface capable of integrating sound and video transmission together or a keyboard-mouse-monitor switcher (KVM switch). , but not limited to this. Since the high-resolution multimedia interface transmits uncompressed audio signals and high-resolution video signals through the same network route, analog signals are not converted into digital signals (A/D) or digital signals are converted into analog signals (D). /A) program, so the goal of distortion-free output can be achieved.
請參照第1圖,第1圖係繪示此實施例中之訊號傳輸裝置的示意圖。如第1圖所示,訊號傳輸裝置2係耦接於第一電子裝置1與第二電子裝置3之間。其中,第一電子裝置1為具有高解析度多媒體介面的影音輸出裝置,例如藍光DVD播放器或者是具有數位影像HDMI或DVI輸出的電腦或伺服器等,但不以此為限;第二電子裝置3為包括有高解析度多媒體介面的影音顯示裝置,例如具有高畫質的數位電視、家庭劇院視聽設備或者是投影顯示裝置,但亦不以此為限。Please refer to FIG. 1 , which is a schematic diagram of a signal transmission device in this embodiment. As shown in FIG. 1 , the signal transmission device 2 is coupled between the first electronic device 1 and the second electronic device 3 . The first electronic device 1 is a video output device with a high-resolution multimedia interface, such as a Blu-ray DVD player or a computer or server with a digital image HDMI or DVI output, but not limited thereto; The device 3 is an audio-visual display device including a high-resolution multimedia interface, such as a digital TV with high image quality, a home theater audio-visual device, or a projection display device, but is not limited thereto.
另外,訊號傳輸裝置2所接收到的數位影像訊號以及聲音訊號可來自同一第一電子裝置1,抑或來自不同的第一電子裝置1,亦即影像源與聲音源可以是同一第一電子裝置1或不同的第一電子裝置1,並無特定之限制。同理,訊號傳輸裝置2亦可將數位影像訊號以及聲音訊號輸出至同一第二電子裝置3或不同的第二電子裝置3。In addition, the digital video signal and the audio signal received by the signal transmission device 2 may be from the same first electronic device 1 or from different first electronic devices 1, that is, the image source and the sound source may be the same first electronic device 1 Or different first electronic devices 1, there is no particular limitation. Similarly, the signal transmission device 2 can also output the digital video signal and the audio signal to the same second electronic device 3 or different second electronic devices 3.
於第1圖之實施例中,訊號傳輸裝置2包含傳送器20、傳輸線21及接收器22。其中,傳送器20耦接第一電子裝置1;接收器22耦接第二電子裝置3;傳輸線21係耦接於傳送器20與接收器22之間。於此實施例中,傳輸線21具有至少一對以上的雙絞線,亦可以由CAT-5或CAT-6雙絞線(category 5 or category 6 cable)所構成,例如:Cat-5e,Cat-6,Cat-6e等,其具有四對差動傳輸線,但不以此為限。實際上,傳送器20與第一電子裝置1之間以及接收器22與第二電子裝置3之間可透過高解析多媒體介面(HDMI)、數位視訊介面(DVI)或數位/類比音訊介面進行訊號之傳輸,並無特定之限制。本實施例係以數位影像訊號以及聲音訊號來自同一第一電子裝置1為例進行說明。In the embodiment of FIG. 1, the signal transmission device 2 includes a transmitter 20, a transmission line 21, and a receiver 22. The transmitter 20 is coupled to the first electronic device 1; the receiver 22 is coupled to the second electronic device 3; and the transmission line 21 is coupled between the transmitter 20 and the receiver 22. In this embodiment, the transmission line 21 has at least one pair of twisted pairs, and may also be composed of a CAT-5 or CAT-6 twisted pair cable (Catometer 5 or category 6 cable), for example: Cat-5e, Cat- 6, Cat-6e, etc., which has four pairs of differential transmission lines, but not limited thereto. In fact, the signal between the transmitter 20 and the first electronic device 1 and between the receiver 22 and the second electronic device 3 can be transmitted through a high resolution multimedia interface (HDMI), a digital video interface (DVI) or a digital/analog audio interface. There are no specific restrictions on the transmission. In this embodiment, the digital video signal and the audio signal are from the same first electronic device 1 as an example.
如第1圖所示,傳送器20至少包含有具有不同通過頻段之第一濾波模組201與第二濾波模組202及單端/差動訊號轉換模組203。第二濾波模組202之輸入端耦接單端/差動訊號轉換模組203且第二濾波模組202之輸出端耦接第一濾波模組201之輸出端。於此實施例中,第一濾波模組201係依照第一通過頻段對接收自第一電子裝置1的一對數位差動訊號DD±進行濾波以輸出一對濾波數位差動訊號FDD±。單端/差動訊號轉換模組203將單端聲音訊號SA轉換為一對差動聲音訊號DA±,再由第二濾波模組202依照第二通過頻段對該對差動聲音訊號DA±進行濾波以輸出一對濾波差動聲音訊號FDA±。該對濾波數位差動訊號FDD±與該對濾波差動聲音訊號FDA±合成為一對合成差動訊號SD±,並透過傳輸線21中之一對差動傳輸線將該對合成差動訊號SD±傳輸至接收器22。As shown in FIG. 1 , the transmitter 20 includes at least a first filter module 201 and a second filter module 202 and a single-ended/differential signal conversion module 203 having different pass bands. The input end of the second filter module 202 is coupled to the single-ended/differential signal conversion module 203 and the output end of the second filter module 202 is coupled to the output end of the first filter module 201. In this embodiment, the first filter module 201 filters the pair of digital differential signals DD± received from the first electronic device 1 according to the first pass frequency band to output a pair of filtered digital differential signals FDD±. The single-ended/differential signal conversion module 203 converts the single-ended audio signal SA into a pair of differential audio signals DA±, and the second filter module 202 performs the pair of differential audio signals DA± according to the second passband. Filter to output a pair of filtered differential sound signals FDA±. The pair of filtered digital differential signals FDD± and the pair of filtered differential audio signals FDA± are combined into a pair of combined differential signals SD±, and the differential signal SD± is synthesized by one pair of differential transmission lines in the transmission line 21. Transfer to the receiver 22.
如第3A圖所示,該圖係為合成差動訊號示意圖。在第3A圖中,僅以正差動來說明,該對濾波差動聲音訊號FDA±係為一類比差動聲音訊號,而該對濾波數位差動訊號FDD±係掛載於該對濾波差動聲音訊號FDA±上;配合第2圖來看,第3A圖中之訊號STMDS(data)為經過第2圖中之第二資料高通濾波單元423/第三資料高通濾波單元424的TMDS資料訊號DD2±/DD3±,而訊號Saudio為經過第一類比聲音低通濾波單元432/第二類比聲音低通濾波單元433的差動類比聲音訊號DAA1±/DAA2±,而訊號Smix則為混合的高通濾波數位資料差動訊號FDD2±/FDD3±。如第3B圖所示,以正差動來說明,該對濾波差動聲音訊號FDA±係為一數位差動聲音訊號,而該對濾波數位差動訊號FDD±係掛載於該對濾波差動聲音訊號FDA±上;配合第2圖來看,第3B圖中之訊號STMDS(CLK)為經過時脈高通濾波單元421的TMDS時脈訊號DC±,訊號SSPDIF為經過數位聲音低通濾波單元431的SPDIF訊號,而訊號Smix(FDC)為混合的高通濾波數位時脈差動訊號FDC±。實際上,單端/差動訊號轉換模組203可包含有運算放大器(Operational Amplifier),用以將單端聲音訊號SA轉換為一對差動聲音訊號DA±,以增加訊號傳送之距離並可避免雜訊之干擾。As shown in Fig. 3A, the figure is a schematic diagram of a synthetic differential signal. In Fig. 3A, only the positive differential is used to illustrate that the pair of filtered differential audio signals FDA± is an analog differential sound signal, and the pair of filtered digital differential signals FDD± are mounted on the pair of differential filters. The sound signal FDA± is on; with the second figure, the signal S TMDS (data) in the 3A picture is the TMDS data of the second data high-pass filtering unit 423 / the third data high-pass filtering unit 424 in FIG. 2 . The signal DD2±/DD3±, and the signal S audio is the differential analog sound signal DAA1±/DAA2± passing through the first analog sound low-pass filtering unit 432/second analog sound low-pass filtering unit 433, and the signal S mix is Mixed high-pass filtered digital data differential signal FDD2±/FDD3±. As shown in FIG. 3B, the positive differential signal indicates that the pair of filtered differential audio signals FDA± is a digital differential sound signal, and the pair of filtered digital differential signals FDD± are mounted on the pair of differential signals. As shown in Figure 2, the signal S TMDS(CLK) in Figure 3B is the TMDS clock signal DC± of the clock high-pass filter unit 421, and the signal S SPDIF is the digital sound low pass. The SPDIF signal of the filtering unit 431, and the signal S mix (FDC) is a mixed high-pass filtered digital clock differential signal FDC±. In fact, the single-ended/differential signal conversion module 203 can include an operational amplifier (Aperture Amplifier) for converting the single-ended audio signal SA into a pair of differential audio signals DA± to increase the distance of the signal transmission. Avoid noise interference.
接收器22至少包含有第三濾波模組221、第四濾波模組222及差動/單端訊號轉換模組223。第三濾波模組221之輸入端耦接第四濾波模組222之輸入端,差動/單端訊號轉換模組223耦接第四濾波模組222之輸出端。當接收器22自網路線21中之該對差動傳輸線接收到該對合成差動訊號SD±後,第三濾波模組221依照第一通過頻段對該對合成差動訊號SD±進行濾波以輸出該對數位差動訊號DD±至第二電子裝置3。第四濾波模組222依照第二通過頻段對該對合成差動訊號SD±進行濾波以輸出該對差動聲音訊號DA±,並由差動/單端訊號轉換模組223將該對差動聲音訊號DA±轉換為單端聲音訊號SA,並輸出至第二電子裝置3。實際上,差動/單端訊號轉換模組223可包含有運算放大器(Operational Amplifier)。需注意的是,在一實施例中,若單端聲音訊號SA為類比立體聲訊號,其還原後之單端聲音訊號SA的振幅可與原來輸入至傳送器20之單端聲音訊號SA的振幅大小相同;若單端聲音訊號SA為數位的SPDIF訊號,則其振幅大小需符合光纖(Toslink)傳輸介面所能接受之振幅規格。The receiver 22 includes at least a third filter module 221, a fourth filter module 222, and a differential/single-ended signal conversion module 223. The input end of the third filter module 221 is coupled to the input end of the fourth filter module 222, and the differential/single-ended signal conversion module 223 is coupled to the output end of the fourth filter module 222. After the receiver 22 receives the pair of combined differential signals SD± from the pair of differential transmission lines in the network route 21, the third filtering module 221 filters the pair of synthesized differential signals SD± according to the first passband. The logarithmic differential signal DD± is output to the second electronic device 3. The fourth filter module 222 filters the pair of combined differential signals SD± according to the second passband to output the pair of differential audio signals DA±, and the differential/single-ended signal conversion module 223 differentially pairs the pair The audio signal DA± is converted into a single-ended audio signal SA and output to the second electronic device 3. In fact, the differential/single-ended signal conversion module 223 can include an operational amplifier (Operational Amplifier). It should be noted that, in an embodiment, if the single-ended audio signal SA is an analog stereo signal, the amplitude of the restored single-ended audio signal SA may be the amplitude of the single-ended audio signal SA originally input to the transmitter 20. The same; if the single-ended voice signal SA is a digital SPDIF signal, the amplitude must be in accordance with the amplitude specifications acceptable for the Toslink transmission interface.
需說明的是,傳送器20之第一濾波模組201與接收器22之第三濾波模組221均係採用第一通過頻段分別對該對數位差動訊號DD±及該對合成差動訊號SD±進行高通濾波。於實際應用中,若該對數位差動訊號DD±為一對數位時脈差動訊號(例如TMDS時脈訊號),由於一般數位時脈差動訊號之頻率範圍約介於20MHz至225MHz之間,因此,本發明之第一通過頻段係設定為11MHz以上的頻率範圍,使得該對數位時脈差動訊號之外的雜訊能夠被此一高通濾波程序所濾除;若該對數位差動訊號DD±為一對數位資料差動訊號(例如TMDS資料訊號),由於一般數位資料差動訊號之頻率範圍約介於10MHz至1.125GHz之間,因此,本發明之第一通過頻段係設定為1.5MHz以上的頻率範圍,使得該對數位資料差動訊號之外的雜訊能夠被此一高通濾波程序所濾除。It should be noted that the first filter module 201 of the transmitter 20 and the third filter module 221 of the receiver 22 respectively use the first pass band to respectively the logarithmic differential signal DD± and the pair of synthesized differential signals. SD± performs high-pass filtering. In practical applications, if the logarithmic differential signal DD± is a pair of digital clock differential signals (such as TMDS clock signals), since the frequency range of the general digital clock differential signal is between 20 MHz and 225 MHz. Therefore, the first pass band of the present invention is set to a frequency range of 11 MHz or more, so that noise other than the logarithmic clock differential signal can be filtered by the high-pass filter program; if the logarithmic difference is The signal DD± is a pair of digital data differential signals (for example, TMDS data signals). Since the frequency range of the general digital data differential signal is between about 10 MHz and 1.125 GHz, the first pass frequency band of the present invention is set to The frequency range above 1.5 MHz enables noise outside the digital data differential signal to be filtered by the high-pass filter.
至於傳送器20之第二濾波模組202與接收器22之第四濾波模組222均係採用第二通過頻段分別對該對差動聲音訊號DA±及該對合成差動訊號SD±進行低通濾波。於實際應用中,若該對差動聲音訊號DA±為一對數位聲音差動訊號(例如SPDIF訊號),由於一般數位聲音差動訊號之頻率範圍約小於8MHz,因此,本發明之第二通過頻段係設定為9MHz以上的頻率範圍,使得該對數位聲音差動訊號之外的雜訊能夠被此一低通濾波程序所濾除;若該對差動聲音訊號DA±為一對類比聲音差動訊號(例如立體聲訊號,單聲道或左右雙聲道),由於一般人耳所能聽到的類比聲音差動訊號之頻率範圍約小於22KHz,因此,本發明之第二通過頻段係設定為530KHz以上的頻率範圍,使得該對類比聲音差動訊號之外的雜訊能夠被此一低通濾波程序所濾除。The second filter module 202 of the transmitter 20 and the fourth filter module 222 of the receiver 22 respectively use the second pass band to respectively lower the pair of differential audio signals DA± and the pair of synthesized differential signals SD±. Pass filter. In practical applications, if the pair of differential audio signals DA± is a pair of digital sound differential signals (for example, SPDIF signals), since the frequency range of the general digital sound differential signal is less than about 8 MHz, the second pass of the present invention The frequency band is set to a frequency range of 9 MHz or more, so that noise other than the logarithmic sound differential signal can be filtered by the low pass filtering program; if the pair of differential sound signals DA± is a pair of analog sound difference The motion signal (such as stereo signal, mono or left and right channels), because the frequency range of the analog sound differential signal that can be heard by the average human ear is less than 22KHz, the second pass band of the present invention is set to 530KHz or more. The frequency range is such that noise other than the analog analog differential signal can be filtered by the low pass filter.
接著,請參照第2圖,第2圖係繪示本發明之訊號傳輸裝置之另一實施例的示意圖。如第2圖所示,訊號傳輸裝置STA包含傳送器4、網路線5及接收器6。其中,傳送器4係耦接數位影像源70、數位音源71與類比音源72;接收器6係耦接數位影像輸出裝置80、數位聲音輸出裝置81與類比聲音輸出裝置82。網路線5包含四對差動傳輸線L1~L4,耦接於傳送器4與接收器6之間。數位影像源70為具有高解析度多媒體介面的影音輸出裝置,例如藍光DVD播放器或者是具有數位影像HDMI或DVI輸出的電腦或伺服器等,但不以此為限;數位音源71透過光纖(Toslink)傳送SPDIF(Sony Philips Digital Interconnect Format)訊號至傳送器4;類比音源72為立體聲產生器,用以產生具有類比格式的雙聲道音訊,左聲道立體聲訊號及右聲道立體聲訊號至傳送器4。數位影像輸出裝置80為具有高解析度多媒體介面的影音顯示裝置,例如具有高畫質的數位電視或者是投影顯示裝置,但亦不以此為限。要說明的是,雖然本實施例中,類比音源72與數位音源71係為同時存在,但在實際上,並不以第2圖所示之實施例為限制。例如,亦可僅有數位音源71存在,或者是僅有類比音源72存在。Next, please refer to FIG. 2, which is a schematic diagram showing another embodiment of the signal transmission device of the present invention. As shown in FIG. 2, the signal transmission device STA includes a transmitter 4, a network route 5, and a receiver 6. The transmitter 4 is coupled to the digital image source 70, the digital sound source 71, and the analog sound source 72. The receiver 6 is coupled to the digital image output device 80, the digital sound output device 81, and the analog sound output device 82. The network route 5 includes four pairs of differential transmission lines L1 to L4 coupled between the transmitter 4 and the receiver 6. The digital image source 70 is a video output device having a high-resolution multimedia interface, such as a Blu-ray DVD player or a computer or a server having a digital image HDMI or DVI output, but not limited thereto; the digital sound source 71 is transmitted through an optical fiber ( Toslink) transmits SPDIF (Sony Philips Digital Interconnect Format) signal to transmitter 4; analog source 72 is a stereo generator for generating two-channel audio with analog format, left channel stereo signal and right channel stereo signal to transmission Device 4. The digital video output device 80 is a video display device having a high-resolution multimedia interface, such as a digital television with high image quality or a projection display device, but is not limited thereto. It should be noted that although in the present embodiment, the analog sound source 72 and the digital sound source 71 are simultaneously present, in practice, the embodiment shown in FIG. 2 is not limited. For example, only the digital sound source 71 may exist or only the analog sound source 72 may exist.
首先,先就傳送器4進行詳細的說明。傳送器4包含有緩衝器(buffer)40、單端/差動訊號轉換模組41、第一濾波模組42、第二濾波模組43、差動訊號傳送器44及電感元件L。其中,電感元件L亦可採用磁珠(bead)元件取代之,差動訊號傳送器44可以是RJ-45訊號傳送器,本實施例係為RJ-45的連接口。第一濾波模組42包含有四個高通(high-pass)濾波單元421~424且第二濾波模組包含三個低通(low-pass)濾波單元431~433。這四個高通濾波單元421~424分別是時脈高通濾波單元421、第一資料高通濾波單元422、第二資料高通濾波單元423及第三資料高通濾波單元424。這三個低通濾波單元431~433分別是數位聲音低通濾波單元431、第一類比聲音低通濾波單元432及第二類比聲音低通濾波單元433。First, the transmitter 4 will be described in detail first. The transmitter 4 includes a buffer 40, a single-ended/differential signal conversion module 41, a first filter module 42, a second filter module 43, a differential signal transmitter 44, and an inductance element L. The inductor element L can also be replaced by a bead element, and the differential signal transmitter 44 can be an RJ-45 signal transmitter. This embodiment is a connection port of the RJ-45. The first filter module 42 includes four high-pass filter units 421-424 and the second filter module includes three low-pass filter units 431-433. The four high-pass filter units 421-424 are a clock high-pass filter unit 421, a first data high-pass filter unit 422, a second data high-pass filter unit 423, and a third data high-pass filter unit 424, respectively. The three low pass filtering units 431 to 433 are a digital sound low pass filtering unit 431, a first analog sound low pass filtering unit 432, and a second analog sound low pass filtering unit 433, respectively.
如第2圖所示,時脈高通濾波單元421、第一資料高通濾波單元422、第二資料高通濾波單元423及第三資料高通濾波單元424之輸入端均耦接緩衝器40;數位聲音低通濾波單元431、第一類比聲音低通濾波單元432及第二類比聲音低通濾波單元433之輸入端均耦接單端/差動訊號轉換模組41;時脈高通濾波單元421、第一資料高通濾波單元422、第二資料高通濾波單元423及第三資料高通濾波單元424之輸出端均耦接差動訊號傳送器44;數位聲音低通濾波單元431之輸出端耦接至時脈高通濾波單元421之輸出端與差動訊號傳送器44之間;第一類比聲音低通濾波單元432之輸出端耦接至第二資料高通濾波單元423之輸出端與差動訊號傳送器44之間;第二類比聲音低通濾波單元433之輸出端耦接至第三資料高通濾波單元424之輸出端與差動訊號傳送器44之間;電感元件(或磁珠元件)L之一端耦接至接地端G,另一端耦接至第一資料高通濾波單元422之輸出端與差動訊號傳送器44之間。要說明的是,耦接至地端G的目的係為了讓傳送器與接收器的電壓準位可以相互匹配,以避免傳送器與接收器間的異常電壓差造成其中一端損壞;而且接地的方式並不以電感或磁珠元件為限制。As shown in FIG. 2, the input terminals of the clock high-pass filter unit 421, the first data high-pass filter unit 422, the second data high-pass filter unit 423, and the third data high-pass filter unit 424 are all coupled to the buffer 40; the digital sound is low. The input ends of the pass filtering unit 431, the first analog sound low pass filtering unit 432 and the second analog sound low pass filtering unit 433 are all coupled to the single-ended/differential signal conversion module 41; the clock high-pass filtering unit 421, the first The output of the data high-pass filter unit 422, the second data high-pass filter unit 423, and the third data high-pass filter unit 424 are coupled to the differential signal transmitter 44; the output of the digital sound low-pass filter unit 431 is coupled to the clock high-pass The output end of the filtering unit 421 is connected to the differential signal transmitter 44. The output end of the first analog low-pass filtering unit 432 is coupled between the output of the second data high-pass filtering unit 423 and the differential signal transmitter 44. The output of the second analog sound low-pass filter unit 433 is coupled between the output of the third data high-pass filter unit 424 and the differential signal transmitter 44; one end of the inductance element (or magnetic bead element) L is coupled A ground terminal G, and the other end 44 is coupled to the first data between the high-pass filter means and the output terminal 422 of differential signal transmitter. It should be noted that the purpose of coupling to the ground G is to match the voltage levels of the transmitter and the receiver to avoid damage caused by an abnormal voltage difference between the transmitter and the receiver; and the way of grounding It is not limited by inductance or magnetic bead components.
需說明的是,第一類比聲音低通濾波單元432之輸出端並非一定要耦接至第二資料高通濾波單元423之輸出端與差動訊號傳送器44之間,第二類比聲音低通濾波單元433之輸出端也不一定非要耦接至第三資料高通濾波單元424之輸出端與差動訊號傳送器44之間。實際上,第一類比聲音低通濾波單元432及第二類比聲音低通濾波單元433之輸出端可耦接至第一資料高通濾波單元422之輸出端與差動訊號傳送器44之間、第二資料高通濾波單元423之輸出端與差動訊號傳送器44之間以及第三資料高通濾波單元424之輸出端與差動訊號傳送器44之間中之任兩者。至於三者中之另一者則透過電感元件(或磁珠元件)L耦接至接地端G。本實施例係以第一資料高通濾波單元422之輸出端來耦接至地端G。It should be noted that the output end of the first analog low-pass filter unit 432 is not necessarily coupled to the output of the second data high-pass filter unit 423 and the differential signal transmitter 44, and the second analog sound is low-pass filtered. The output of the unit 433 does not have to be coupled between the output of the third data high-pass filter unit 424 and the differential signal transmitter 44. In fact, the output of the first analog low-pass filter unit 432 and the second analog low-pass filter unit 433 can be coupled between the output of the first data high-pass filter unit 422 and the differential signal transmitter 44. The two ends of the data high-pass filtering unit 423 and the differential signal transmitter 44 and between the output of the third data high-pass filtering unit 424 and the differential signal transmitter 44. The other of the three is coupled to the ground terminal G through an inductance element (or a bead element) L. This embodiment is coupled to the ground end G by the output end of the first data high-pass filter unit 422.
當緩衝器40自數位影像源70接收到四對數位差動訊號(包含一對數位時脈差動訊號DC±及三對數位資料差動訊號DD1±、DD2±與DD3±)時,緩衝器40將會增強該四對數位差動訊號DC±、DD1±、DD2±及DD3±之強度,以增加其傳輸距離。接著,緩衝器40將增強後之該四對數位差動訊號DC±、DD1±、DD2±及DD3±分別輸出至第一濾波模組42之時脈高通濾波單元421、第一資料高通濾波單元422、第二資料高通濾波單元423及第三資料高通濾波單元424。要說明的是,本發明之緩衝器40並非必要之元件,其係可以視傳輸距離而決定是否要使用,如果傳輸距離長的話可以使用緩衝器40,如果傳輸距離短時,並不一定要使用。When the buffer 40 receives four pairs of differential signals (including a pair of digital clock differential signals DC± and three pairs of data differential signals DD1±, DD2± and DD3±) from the digital image source 70, the buffer 40 will enhance the strength of the four-digit differential signals DC±, DD1±, DD2±, and DD3± to increase the transmission distance. Then, the buffer 40 outputs the enhanced four-bit differential signals DC±, DD1±, DD2±, and DD3± to the clock high-pass filter unit 421 of the first filter module 42 and the first data high-pass filter unit. 422. The second data high-pass filtering unit 423 and the third data high-pass filtering unit 424. It is to be noted that the buffer 40 of the present invention is not an essential component, and it can be determined depending on the transmission distance. If the transmission distance is long, the buffer 40 can be used. If the transmission distance is short, it is not necessary to use .
時脈高通濾波單元421依照時脈通過頻段對該對數位時脈差動訊號DC±進行高通濾波,以輸出一對高通濾波數位時脈差動訊號FDC±;第一資料高通濾波單元422、第二資料高通濾波單元423及第三資料高通濾波單元424分別依照資料通過頻段對該三對數位資料差動訊號DD1±、DD2±與DD3±進行高通濾波,以分別輸出三對高通濾波數位資料差動訊號FDD1±、FDD2±與FDD3±。實際上,由於一般數位時脈差動訊號(例如TMDS時脈訊號)之頻率範圍約介於20MHz至225MHz之間,因此,本發明之時脈通過頻段係設定為11MHz以上的頻率範圍,使得該對數位時脈差動訊號DC±之外的雜訊能夠被此一高通濾波程序所濾除。此外,由於一般數位資料差動訊號(例如TMDS資料訊號)之頻率範圍約介於10MHz至1.125GHz之間,因此,本發明之資料通過頻段係設定為1.5MHz以上的頻率範圍,使得該對數位資料差動訊號之外的雜訊能夠被此一高通濾波程序所濾除。The clock high-pass filtering unit 421 performs high-pass filtering on the logarithmic clock differential signal DC± according to the clock pass frequency band to output a pair of high-pass filtered digital clock differential signals FDC±; the first data high-pass filtering unit 422, the first The two data high-pass filtering unit 423 and the third data high-pass filtering unit 424 respectively perform high-pass filtering on the three pairs of digital data differential signals DD1±, DD2± and DD3± according to the data passing frequency band to respectively output three pairs of high-pass filtering digital data differences. The signals are FDD1±, FDD2± and FDD3±. In fact, since the frequency range of the general digital clock differential signal (for example, the TMDS clock signal) is between about 20 MHz and 225 MHz, the clock pass frequency band of the present invention is set to a frequency range of 11 MHz or more, so that the frequency range is Noise other than the digital clock differential signal DC± can be filtered by this high-pass filter. In addition, since the frequency range of the general digital data differential signal (for example, the TMDS data signal) is between about 10 MHz and 1.125 GHz, the data of the present invention is set to a frequency range of 1.5 MHz or more through the frequency band system, so that the logarithmic bit is made. Noise outside the data differential signal can be filtered by this high-pass filter.
另一方面,當單端/差動訊號轉換模組41分別自數位音源71與類比音源72接收到單端數位聲音訊號SDA及兩單端類比聲音訊號SAA1、SAA2時,單端/差動訊號轉換模組41將會分別把單端數位聲音訊號SDA及兩單端類比聲音訊號SAA1、SAA2轉換為一對差動數位聲音訊號DDA±及兩對差動類比聲音訊號DAA1±、DAA2±,並將該對差動數位聲音訊號DDA±輸出至數位聲音低通濾波單元431,以及將該兩對差動類比聲音訊號DAA1±、DAA2±輸出至第一類比聲音低通濾波單元432及第二類比聲音低通濾波單元433。On the other hand, when the single-ended/differential signal conversion module 41 receives the single-ended digital audio signal SDA and the two single-ended analog audio signals SAA1 and SAA2 from the digital sound source 71 and the analog sound source 72, the single-ended/differential signal The conversion module 41 converts the single-ended digital audio signal SDA and the two single-ended analog audio signals SAA1 and SAA2 into a pair of differential digital audio signals DDA± and two pairs of differential analog audio signals DAA1± and DAA2±, respectively. And outputting the pair of differential digital sound signals DDA± to the digital sound low-pass filtering unit 431, and outputting the two pairs of differential analog sound signals DAA1±, DAA2± to the first analog sound low-pass filtering unit 432 and the second analogy Sound low pass filtering unit 433.
當數位聲音低通濾波單元431接收到該對差動數位聲音訊號DDA±時,數位聲音低通濾波單元431依照數位聲音通過頻段對該對差動數位聲音訊號DDA±進行低通濾波,以輸出一對低通濾波差動數位聲音訊號FDDA±至時脈高通濾波單元421與差動訊號傳送器44之間,使得該對低通濾波差動數位聲音訊號FDDA±能夠與時脈高通濾波單元421所輸出的該對高通濾波數位時脈差動訊號FDC±合成為第一對合成差動訊號SD1±,並透過差動訊號傳送器44輸出至網路線5中之第一對差動傳輸線L1。When the digital sound low-pass filtering unit 431 receives the pair of differential digital sound signals DDA±, the digital sound low-pass filtering unit 431 low-pass filters the differential digital sound signal DDA± according to the digital sound through the frequency band to output A pair of low pass filtered differential digital sound signals FDDA± to the clock high pass filtering unit 421 and the differential signal transmitter 44, such that the pair of low pass filtered differential digital sound signals FDDA± can be coupled with the clock high pass filtering unit 421 The pair of high-pass filtered digital clock differential signals FDC± outputted are synthesized into a first pair of synthesized differential signals SD1±, and output to the first pair of differential transmission lines L1 in the network route 5 through the differential signal transmitter 44.
當第一類比聲音低通濾波單元432接收到第一對差動類比聲音訊號DAA1±時,第一類比聲音低通濾波單元432依照類比聲音通過頻段對第一對差動類比聲音訊號DAA1±進行低通濾波,以輸出第一對低通濾波差動類比聲音訊號FDAA1±至第二資料高通濾波單元423與差動訊號傳送器44之間,使得第一對低通濾波差動類比聲音訊號FDAA1±能夠與第二資料高通濾波單元423所輸出的第二對高通濾波數位資料差動訊號FDD2±合成為第三對合成差動訊號SD3±,並透過差動訊號傳送器44輸出至網路線5中之第三對差動傳輸線L3。When the first analog sound low-pass filtering unit 432 receives the first pair of differential analog sound signals DAA1±, the first analog sound low-pass filtering unit 432 performs the first pair of differential analog sound signals DAA1± according to the analog sound passing frequency band. Low-pass filtering to output a first pair of low-pass filtered differential analog audio signals FDAA1± to the second data high-pass filtering unit 423 and the differential signal transmitter 44, such that the first pair of low-pass filtered differential analog audio signals FDAA1 The second pair of high-pass filtered digital data differential signals FDD2± outputted by the second data high-pass filtering unit 423 can be combined into a third pair of synthesized differential signals SD3±, and output to the network route 5 through the differential signal transmitter 44. The third pair of differential transmission lines L3.
同理,當第二類比聲音低通濾波單元433接收到第二對差動類比聲音訊號DAA2±時,第二類比聲音低通濾波單元433依照類比聲音通過頻段對第二對差動類比聲音訊號DAA2±進行低通濾波,以輸出第二對低通濾波差動類比聲音訊號FDAA2±至第三資料高通濾波單元424與差動訊號傳送器44之間,使得第二對低通濾波差動類比聲音訊號FDAA2±能夠與第三資料高通濾波單元424所輸出的第三對高通濾波數位資料差動訊號FDD3±合成為第四對合成差動訊號SD4±,並透過差動訊號傳送器44輸出至網路線5中之第四對差動傳輸線L4。至於第一資料高通濾波單元422所輸出的第一對高通濾波數位資料差動訊號FDD1±係透過差動訊號傳送器44輸出至網路線5中之第二對差動傳輸線L2,該對高通濾波數位資料差動訊號係以SD2±表示。Similarly, when the second analog sound low-pass filtering unit 433 receives the second pair of differential analog sound signals DAA2±, the second analog sound low-pass filtering unit 433 passes the frequency band to the second pair of differential analog sound signals according to the analog sound. The DAA2± performs low-pass filtering to output a second pair of low-pass filtered differential analog audio signals FDAA2± to the third data high-pass filtering unit 424 and the differential signal transmitter 44, so that the second pair of low-pass filtering differential analogy The audio signal FDAA2± can be combined with the third pair of high-pass filtered digital data differential signals FDD3± output by the third data high-pass filtering unit 424 into a fourth pair of synthesized differential signals SD4±, and output to the differential signal transmitter 44 through the differential signal transmitter 44. The fourth pair of differential transmission lines L4 in the network route 5. The first pair of high-pass filtered digital data differential signals FDD1± output by the first data high-pass filtering unit 422 are output to the second pair of differential transmission lines L2 in the network route 5 through the differential signal transmitter 44, and the pair of high-pass filters The digital data differential signal is represented by SD2±.
實際上,由於一般數位聲音差動訊號(例如SPDIF訊號)之頻率範圍約小於8MHz,因此,本發明之數位聲音通過頻段係設定為9MHz以上的頻率範圍,使得該對數位聲音差動訊號DDA±之外的雜訊能夠被此一低通濾波程序所濾除。此外,由於一般人耳所能聽到的類比聲音差動訊號(例如立體聲訊號)之頻率範圍約小於22KHz,因此,本發明之類比聲音通過頻段係設定為530KHz以上的頻率範圍,使得該兩對類比聲音差動訊號DAA1±及DAA2±之外的雜訊能夠被此一低通濾波程序所濾除。藉由高通與低通頻段的篩選組合,可以讓影像訊號和聲音訊號組合時,不會相互干擾而讓影像與聲音訊號可以同時在同對雙絞線上傳輸。此外,如第2圖實施例的配置,可以讓聲音(類比、數位或者是類比與數位的組合)以及影像(如DVI或HDMI)在單一條Cat 5.傳輸線上傳輸。In fact, since the frequency range of the general digital sound differential signal (for example, SPDIF signal) is less than about 8 MHz, the digital sound of the present invention is set to a frequency range of 9 MHz or more through the frequency band system, so that the logarithmic sound differential signal DDA± Noise outside of the filter can be filtered by this low pass filter. In addition, since the frequency range of the analog sound differential signal (for example, the stereo signal) that can be heard by the general human ear is less than about 22 kHz, the analog sound passing frequency band of the present invention is set to a frequency range of 530 kHz or more, so that the two pairs of analog sounds are made. Noise other than the differential signals DAA1± and DAA2± can be filtered by this low-pass filter. By combining the high-pass and low-pass bands, the image signal and the audio signal can be combined without interfering with each other so that the image and sound signals can be transmitted simultaneously on the same pair of twisted pairs. In addition, the configuration of the embodiment of Fig. 2 allows sound (analog, digital or analogous to digital combination) and images (such as DVI or HDMI) to be transmitted over a single Cat 5. transmission line.
接下來,將就接收器6進行詳細的說明。如第2圖所示,接收器6包含有補償器60、差動/單端訊號轉換模組61、第三濾波模組62、第四濾波模組63、差動訊號接收器64及電感元件L。其中,電感元件L亦可採用磁珠元件取代之,差動訊號接收器64可以是RJ-45訊號接收器。值得注意的是,第三濾波模組62包含有四個高通濾波單元621~624且第四濾波模組包含三個低通濾波單元631~633。這四個高通濾波單元621~624分別是時脈高通濾波單元621、第一資料高通濾波單元622、第二資料高通濾波單元623及第三資料高通濾波單元624。這三個低通濾波單元631~633分別是數位聲音低通濾波單元631、第一類比聲音低通濾波單元632及第二類比聲音低通濾波單元633。Next, the receiver 6 will be described in detail. As shown in FIG. 2, the receiver 6 includes a compensator 60, a differential/single-ended signal conversion module 61, a third filter module 62, a fourth filter module 63, a differential signal receiver 64, and an inductive component. L. The inductive component L can also be replaced by a magnetic bead component, and the differential signal receiver 64 can be an RJ-45 signal receiver. It should be noted that the third filter module 62 includes four high-pass filter units 621-624 and the fourth filter module includes three low-pass filter units 631-633. The four high-pass filtering units 621-624 are a clock high-pass filtering unit 621, a first data high-pass filtering unit 622, a second data high-pass filtering unit 623, and a third data high-pass filtering unit 624, respectively. The three low pass filtering units 631 to 633 are a digital sound low pass filtering unit 631, a first analog sound low pass filtering unit 632, and a second analog sound low pass filtering unit 633, respectively.
如第2圖所示,時脈高通濾波單元621、第一資料高通濾波單元622、第二資料高通濾波單元623及第三資料高通濾波單元624之輸出端均耦接補償器60;數位聲音低通濾波單元631、第一類比聲音低通濾波單元632及第二類比聲音低通濾波單元633之輸出端均耦接差動/單端訊號轉換模組61;時脈高通濾波單元621、第一資料高通濾波單元622、第二資料高通濾波單元623及第三資料高通濾波單元624之輸入端均耦接差動訊號接收器64;數位聲音低通濾波單元631之輸入端、第一類比聲音低通濾波單元632之輸入端以及第二類比聲音低通濾波單元633之輸入端亦耦接至差動訊號接收器64所具有之三對雙絞線上。As shown in FIG. 2, the outputs of the clock high-pass filter unit 621, the first data high-pass filter unit 622, the second data high-pass filter unit 623, and the third data high-pass filter unit 624 are coupled to the compensator 60; the digital sound is low. The output of the pass filter unit 631, the first analog sound low pass filter unit 632 and the second analog sound low pass filter unit 633 are coupled to the differential/single-ended signal conversion module 61; the clock high-pass filter unit 621, the first The input ends of the data high-pass filter unit 622, the second data high-pass filter unit 623, and the third data high-pass filter unit 624 are all coupled to the differential signal receiver 64; the input end of the digital sound low-pass filter unit 631 is low in the first analog sound. The input of the pass filtering unit 632 and the input of the second analog sound low pass filtering unit 633 are also coupled to the three pairs of twisted pairs of the differential signal receiver 64.
第一類比聲音低通濾波單元632及第二類比聲音低通濾波單元633之輸入端可耦接至第一資料高通濾波單元622之輸入端與差動訊號接收器64之間、第二資料高通濾波單元623之輸入端與差動訊號接收器64之間以及第三資料高通濾波單元624之輸入端與差動訊號接收器64之間中之任兩者。在本實施例中,數位聲音低通濾波單元631耦接至時脈高通濾波單元621之輸入端與差動訊號接收器64之間;第一類比聲音低通濾波單元632之輸入端耦接至第二資料高通濾波單元623之輸入端與差動訊號接收器64之間;以及第二類比聲音低通濾波單元633之輸入端亦耦接至第三資料高通濾波單元624之輸入端與差動訊號接收器64之間以接收合成差動訊號。至於三者中之另一者則透過電感元件L耦接至接地端G。本實施例中,利用電感元件(或磁珠元件)L之一端耦接至接地端G,另一端耦接至第一資料高通濾波單元622之輸入端與差動訊號接收器64之間;耦接接地之方式並不以電感元件與磁珠元件為限。在本實施例中,上述第一類比聲音低通濾波單元632及第二類比聲音低通濾波單元633之輸入端的耦接關係相對應於第一類比聲音低通濾波單元432及第二類比聲音低通濾波單元433之輸入端的耦接關係,但不以此為限。The input end of the first analog low-pass filter unit 632 and the second analog sound low-pass filter unit 633 can be coupled between the input end of the first data high-pass filter unit 622 and the differential signal receiver 64, and the second data high-pass Both the input of the filtering unit 623 and the differential signal receiver 64 and between the input of the third data high-pass filtering unit 624 and the differential signal receiver 64. In this embodiment, the digital sound low pass filtering unit 631 is coupled between the input end of the clock high pass filtering unit 621 and the differential signal receiver 64; the input end of the first analog sound low pass filtering unit 632 is coupled to The input of the second data high-pass filter unit 623 and the differential signal receiver 64; and the input of the second analog sound low-pass filter unit 633 are also coupled to the input of the third data high-pass filter unit 624 and the differential The signal receiver 64 receives the combined differential signal. The other of the three is coupled to the ground terminal G through the inductance element L. In this embodiment, one end of the inductor element (or the bead element) L is coupled to the ground terminal G, and the other end is coupled between the input end of the first data high-pass filter unit 622 and the differential signal receiver 64; The method of grounding is not limited to the inductive component and the magnetic bead component. In this embodiment, the coupling relationship between the input ends of the first analog sound low pass filtering unit 632 and the second analog sound low pass filtering unit 633 corresponds to the first analog sound low pass filtering unit 432 and the second analog sound is low. The coupling relationship of the input ends of the filtering unit 433 is not limited thereto.
當差動訊號接收器64分別自網路線5中之第一對差動傳輸線L1、第二對差動傳輸線L2、第三對差動傳輸線L3及第四對差動傳輸線L4接收到第一對合成差動訊號SD1±、高通濾波數位資料差動訊號SD2±、第三對合成差動訊號SD3±及第四對合成差動訊號SD4±時,差動訊號接收器64分別將第一對合成差動訊號SD1±、高通濾波數位資料差動訊號SD2±、第三對合成差動訊號SD3±及第四對合成差動訊號SD4±傳送至時脈高通濾波單元621、第一資料高通濾波單元622、第二資料高通濾波單元623及第三資料高通濾波單元624。When the differential signal receiver 64 receives the first pair from the first pair of differential transmission lines L1, the second pair of differential transmission lines L2, the third pair of differential transmission lines L3, and the fourth pair of differential transmission lines L4 in the network route 5, respectively When the differential signal SD1±, the high-pass filtered digital data differential signal SD2±, the third pair of synthesized differential signals SD3±, and the fourth pair of synthesized differential signals SD4± are synthesized, the differential signal receiver 64 respectively synthesizes the first pair The differential signal SD1±, the high-pass filtered digital data differential signal SD2±, the third pair of synthesized differential signal SD3±, and the fourth pair of synthesized differential signal SD4± are transmitted to the clock high-pass filtering unit 621 and the first data high-pass filtering unit 622. The second data high-pass filtering unit 623 and the third data high-pass filtering unit 624.
時脈高通濾波單元621依照時脈通過頻段對第一對合成差動訊號SD1±進行高通濾波,以輸出該對數位時脈差動訊號DC±至補償器60;第一資料高通濾波單元622、第二資料高通濾波單元623及第三資料高通濾波單元624分別依照資料通過頻段對高通濾波數位資料差動訊號SD2±、第三對合成差動訊號SD3±及第四對合成差動訊號SD4±進行高通濾波,以分別輸出該三對數位資料差動訊號DD1±、DD2±與DD3±至補償器60。實際上,由於一般數位時脈差動訊號(例如TMDS時脈訊號)之頻率範圍約介於20MHz至225MHz之間,因此,本發明之時脈通過頻段係設定為11MHz以上的頻率範圍,使得第一對合成差動訊號SD1±通過此一高通濾波程序後僅保留下來該對數位時脈差動訊號DC±。此外,由於一般數位資料差動訊號(例如TMDS資料訊號)之頻率範圍約介於10MHz至1.125GHz之間,因此,本發明之資料通過頻段係設定為1.5MHz以上的頻率範圍,使得高通濾波數位資料差動訊號SD2±、第三對合成差動訊號SD3±及第四對合成差動訊號SD4±通過高通濾波程序後僅分別保留下來該三對數位資料差動訊號DD1±、DD2±與DD3±。The clock high-pass filtering unit 621 performs high-pass filtering on the first pair of synthesized differential signals SD1± according to the clock pass frequency band to output the logarithmic clock differential signal DC± to the compensator 60; the first data high-pass filtering unit 622, The second data high-pass filter unit 623 and the third data high-pass filter unit 624 respectively filter the digital signal differential signal SD2±, the third pair of composite differential signal SD3±, and the fourth pair of synthesized differential signals SD4± according to the data transmission band. High-pass filtering is performed to output the three-bit digital data differential signals DD1±, DD2±, and DD3± to the compensator 60, respectively. In fact, since the frequency range of the general digital clock differential signal (for example, the TMDS clock signal) is between about 20 MHz and 225 MHz, the clock pass frequency band of the present invention is set to a frequency range of 11 MHz or more, so that The pair of composite differential signals SD1± retains only the logarithmic clock differential signal DC± after passing through this high-pass filtering procedure. In addition, since the frequency range of the general digital data differential signal (for example, the TMDS data signal) is between 10 MHz and 1.125 GHz, the data of the present invention is set to a frequency range of 1.5 MHz or more through the frequency band system, so that the high-pass filtering digital position The data differential signal SD2±, the third pair of synthetic differential signals SD3±, and the fourth pair of synthesized differential signals SD4± pass through the high-pass filtering program and only retain the three pairs of digital data differential signals DD1±, DD2±, and DD3, respectively. ±.
由於數位聲音低通濾波單元631之輸入端耦接至時脈高通濾波單元621之輸入端與差動訊號接收器64之間,因此,數位聲音低通濾波單元631將會接收到第一對合成差動訊號SD1±並且依照數位聲音通過頻段對第一對合成差動訊號SD1±進行低通濾波,以輸出該對差動數位聲音訊號DDA±至差動/單端訊號轉換模組61。由於第一類比聲音低通濾波單元632之輸入端耦接至第二資料高通濾波單元623之輸入端與差動訊號接收器64之間,因此,第一類比聲音低通濾波單元632將會接收到第三對合成差動訊號SD3±並且依照類比聲音通過頻段對第三對合成差動訊號SD3±進行低通濾波,以輸出第一對差動類比聲音訊號DAA1±至差動/單端訊號轉換模組61。同理,由於第二類比聲音低通濾波單元633之輸入端耦接至第三資料高通濾波單元624之輸入端與差動訊號接收器64之間,因此,第二類比聲音低通濾波單元633將會接收到第四對合成差動訊號SD4±並且依照類比聲音通過頻段對第四對合成差動訊號SD4±進行低通濾波,以輸出第二對差動類比聲音訊號DAA2±至差動/單端訊號轉換模組61。Since the input end of the digital sound low-pass filter unit 631 is coupled between the input of the clock high-pass filter unit 621 and the differential signal receiver 64, the digital sound low-pass filter unit 631 will receive the first pair of synthesis. The differential signal SD1± is low-pass filtered by the first pair of synthesized differential signals SD1± according to the digital sound through the frequency band to output the pair of differential digital audio signals DDA± to the differential/single-ended signal conversion module 61. Since the input end of the first analog low-pass filter unit 632 is coupled between the input of the second data high-pass filter unit 623 and the differential signal receiver 64, the first analog sound low-pass filter unit 632 will receive And performing a low-pass filtering on the third pair of synthesized differential signals SD3± according to the analog sound through the frequency band to output the first pair of differential analog audio signals DAA1± to the differential/single-ended signal Conversion module 61. Similarly, since the input end of the second analog sound low-pass filter unit 633 is coupled between the input end of the third data high-pass filter unit 624 and the differential signal receiver 64, the second analog sound low-pass filter unit 633 The fourth pair of synthesized differential signals SD4± will be received and the fourth pair of synthesized differential signals SD4± will be low-pass filtered according to the analog sound through the frequency band to output a second pair of differential analog audio signals DAA2± to differential/ Single-ended signal conversion module 61.
實際上,由於一般數位聲音差動訊號(例如SPDIF訊號)之頻率範圍約小於8MHz,因此,本發明之數位聲音通過頻段係設定為9MHz以上的頻率範圍,使得第一對合成差動訊號SD1±通過此一低通濾波程序後僅保留下來該對數位聲音差動訊號DDA±。此外,由於一般人耳所能聽到的類比聲音差動訊號(例如立體聲訊號之頻率範圍約小於22KHz,因此,本發明之類比聲音通過頻段係設定為530KHz以上的頻率範圍,使得第三對合成差動訊號SD3±及第四對合成差動訊號SD4±通過低通濾波程序後僅保留下來該兩對類比聲音差動訊號DAA1±及DAA2±。In fact, since the frequency range of the general digital sound differential signal (for example, the SPDIF signal) is less than about 8 MHz, the digital sound of the present invention is set to a frequency range of 9 MHz or more through the frequency band system, so that the first pair of synthetic differential signals SD1± Only the pair of digital sound differential signals DDA± are retained by this low pass filtering procedure. In addition, since the analog sound differential signal that can be heard by the human ear (for example, the frequency range of the stereo signal is less than about 22 kHz, the analog sound passage frequency band of the present invention is set to a frequency range of 530 kHz or more, so that the third pair of synthetic differentials The signal SD3± and the fourth pair of synthesized differential signals SD4± pass only the two pairs of analog sound differential signals DAA1± and DAA2± after passing through the low-pass filtering procedure.
當補償器60接收到該對數位時脈差動訊號DC±及該三對數位資料差動訊號DD1±、DD2±與DD3±時,由於該對數位時脈差動訊號DC±及該三對數位資料差動訊號DD1±、DD2±與DD3±經過長距離的傳輸後,容易產生訊號強度之衰減,因此,補償器60將會補償該對數位時脈差動訊號DC±及該三對數位資料差動訊號DD1±、DD2±與DD3±之強度,並將補償後的該對數位時脈差動訊號DC±及該三對數位資料差動訊號DD1±、DD2±與DD3±輸出至數位影像輸出裝置80。When the compensator 60 receives the logarithmic clock differential signal DC± and the three-digit digital data differential signals DD1±, DD2± and DD3±, due to the logarithmic clock differential signal DC± and the three pairs After the digital data differential signals DD1±, DD2± and DD3± are transmitted over a long distance, the signal strength is easily attenuated. Therefore, the compensator 60 will compensate the logarithmic clock differential signal DC± and the three logarithmic bits. The intensity of the data differential signals DD1±, DD2± and DD3±, and the compensated logarithmic clock differential signal DC± and the three-digit digital data differential signals DD1±, DD2± and DD3± are output to the digital position Image output device 80.
當差動/單端訊號轉換模組61接收到該對差動數位聲音訊號DDA±、第一對差動類比聲音訊號DAA1±及第二對差動類比聲音訊號DAA2±時,差動/單端訊號轉換模組61將會分別將該對差動數位聲音訊號DDA±、第一對差動類比聲音訊號DAA1±及第二對差動類比聲音訊號DAA2±轉換為該對單端數位聲音訊號SDA、第一對單端類比聲音訊號SAA1及第二對單端類比聲音訊號SAA2,並且將該對單端數位聲音訊號SDA輸出至數位聲音輸出裝置81,以及將第一對單端類比聲音訊號SAA1及第二對單端類比聲音訊號SAA2輸出至類比聲音輸出裝置82。When the differential/single-ended signal conversion module 61 receives the pair of differential digital audio signals DDA±, the first pair of differential analog audio signals DAA1±, and the second pair of differential analog audio signals DAA2±, the differential/single The terminal signal conversion module 61 converts the pair of differential digital audio signals DDA±, the first pair of differential analog audio signals DAA1± and the second pair of differential analog audio signals DAA2± into the pair of single-ended digital audio signals, respectively. The first pair of single-ended analog audio signals SAA1 and the second pair of single-ended analog audio signals SAA2, and output the pair of single-ended digital audio signals SDA to the digital sound output device 81, and the first pair of single-ended analog audio signals The SAA1 and the second pair of single-ended analog sound signals SAA2 are output to the analog sound output device 82.
請參照第4圖,第4圖係繪示本發明之訊號傳輸裝置之傳送器的示意圖。在本實施例中,可以透過一切換器48耦接複數組影音訊號源。實際上,切換器48可視實際需求整合於傳送器4內或設置於傳送器4外而與傳送器4耦接,並無特定之限制。例如:在第4圖中,具有兩組影音源70,71,72,與70a,71a,72a分別耦接至切換器48。透過切換器48的控制可以選擇不同的影音源70,71,72,或70a,71a,72a。選擇之後,影音源70,71,72,或70a,71a,72a所提供的影像與聲音訊號的處理方式則與第2圖所示相同,在此不作贅述。此外,本發明之影音組合技術亦可以應用於KVM切換器(KVM switch)或者是KVM延伸器(KVM extender)中,亦即,在KVM切換器或KVM延伸器中,設置如圖1或圖2的架構來接收與KVM切換器或延伸器所耦接的電腦所提供的聲音與影像。利用將影像訊號與聲音訊號合成,而在具有四對雙絞線的傳輸線上傳輸。Please refer to FIG. 4, which is a schematic diagram showing the transmitter of the signal transmission device of the present invention. In this embodiment, a complex array of video and audio signal sources can be coupled through a switch 48. In fact, the switch 48 is integrated into the transmitter 4 or disposed outside the transmitter 4 to be coupled to the transmitter 4, which is not particularly limited. For example, in FIG. 4, there are two sets of video sources 70, 71, 72, and 70a, 71a, 72a are respectively coupled to the switch 48. Different video sources 70, 71, 72, or 70a, 71a, 72a can be selected by the control of the switch 48. After the selection, the processing methods of the video and audio signals provided by the video source 70, 71, 72, or 70a, 71a, 72a are the same as those shown in FIG. 2, and will not be described herein. In addition, the video and audio combining technology of the present invention can also be applied to a KVM switch or a KVM extender, that is, in a KVM switch or a KVM extender, as shown in FIG. 1 or FIG. 2 The architecture is to receive the sound and image provided by a computer coupled to the KVM switch or extender. The image signal is combined with the sound signal and transmitted on a transmission line having four pairs of twisted pairs.
相較於先前技術,根據本發明之訊號傳輸裝置係透過具有不同通過頻段之濾波器分別對TMDS影像訊號與數位及/或類比聲音訊號進行高通濾波及低通濾波,使得傳送器與接收器之間僅需透過單一條網路線即可順利地藉由混合差動訊號中之高頻率頻段與低頻率頻段同時傳輸TMDS影像訊號與數位及/或類比聲音訊號且彼此之間不會產生任何干擾。因此,根據本發明之訊號傳輸裝置除了能夠有效地避免TMDS影像訊號在網路線傳輸時受到干擾,進而提升訊號傳輸裝置之訊號傳輸品質之外,由於訊號傳輸裝置不需額外設置其他訊號處理或解碼元件即能同時傳輸TMDS影像訊號與數位及/或類比聲音訊號,故可有效節省硬體成本及訊號處理時間,大幅提昇訊號傳輸裝置之市場競爭力。Compared with the prior art, the signal transmission device according to the present invention performs high-pass filtering and low-pass filtering on the TMDS video signal and the digital and/or analog audio signal through filters having different pass bands, so that the transmitter and the receiver are The TMDS video signal and the digital and/or analog audio signals can be transmitted simultaneously through the high frequency band and the low frequency band of the mixed differential signal through a single network route without any interference between them. Therefore, the signal transmission device according to the present invention can effectively avoid the interference of the TMDS video signal during the transmission of the network route, thereby improving the signal transmission quality of the signal transmission device, since the signal transmission device does not need to additionally set other signal processing or decoding. The component can transmit TMDS video signals and digital and/or analog audio signals at the same time, which can effectively save hardware cost and signal processing time, and greatly enhance the market competitiveness of the signal transmission device.
藉由以上較佳具體實施例之詳述,係希望能更加清楚描述本發明之特徵與精神,而並非以上述所揭露的較佳具體實施例來對本發明之範疇加以限制。相反地,其目的是希望能涵蓋各種改變及具相等性的安排於本發明所欲申請之專利範圍的範疇內。The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.
1...第一電子裝置1. . . First electronic device
2、STA...訊號傳輸裝置2, STA. . . Signal transmission device
3...第二電子裝置3. . . Second electronic device
20、4、4a...傳送器20, 4, 4a. . . Transmitter
21...傳輸線twenty one. . . Transmission line
22、6...接收器22, 6. . . receiver
201、42...第一濾波模組201, 42. . . First filter module
202、43...第二濾波模組202, 43. . . Second filter module
221、62...第三濾波模組221, 62. . . Third filter module
222、63...第四濾波模組222, 63. . . Fourth filter module
DD±...一對數位差動訊號DD±. . . One-to-digit differential signal
FDD±...一對濾波數位差動訊號FDD±. . . a pair of filtered digital differential signals
SA...單端聲音訊號SA. . . Single-ended audio signal
DA±...一對差動聲音訊號DA±. . . a pair of differential sound signals
SD±...一對合成差動訊號SD±. . . a pair of synthetic differential signals
FDA±...一對濾波差動聲音訊號FDA±. . . Pair of filtered differential sound signals
203、41...單端/差動訊號轉換模組203, 41. . . Single-ended/differential signal conversion module
223...差動/單端訊號轉換模組223. . . Differential/single-ended signal conversion module
70...數位影像源70. . . Digital image source
71...數位音源71. . . Digital source
72...類比音源72. . . Analog source
80...數位影像輸出裝置80. . . Digital image output device
81...數位聲音輸出裝置81. . . Digital sound output device
82...類比聲音輸出裝置82. . . Analog sound output device
L1~L4...第一對差動傳輸線~第四對差動傳輸線L1~L4. . . First pair of differential transmission lines ~ fourth pair of differential transmission lines
40...緩衝器40. . . buffer
44...差動訊號傳送器44. . . Differential signal transmitter
L...電感元件L. . . Inductive component
G...接地端G. . . Ground terminal
421~424、621~624...高通濾波單元421~424, 621~624. . . High pass filter unit
431~433、631~633...低通濾波單元431~433, 631~633. . . Low pass filter unit
DC±...一對數位時脈差動訊號DC±. . . One-to-digit clock differential signal
FDC±...一對高通濾波數位時脈差動訊號FDC±. . . A pair of high-pass filtered digital clock differential signals
DD1±、DD2±、DD3±...三對數位資料差動訊號DD1±, DD2±, DD3±. . . Three pairs of digital data differential signals
FDD1±、FDD2±、FDD3±...三對高通濾波數位資料差動訊號FDD1±, FDD2±, FDD3±. . . Three pairs of high-pass filtered digital data differential signals
SDA...單端數位聲音訊號SDA. . . Single-ended digital audio signal
DDA±...一對差動數位聲音訊號DDA±. . . a pair of differential digital sound signals
FDDA±...一對低通濾波差動數位聲音訊號FDDA±. . . A pair of low pass filtered differential digital sound signals
SAA1、SAA2...單端類比聲音訊號SAA1, SAA2. . . Single-ended analog sound signal
DAA1±、DAA2±...兩對差動類比聲音訊號DAA1±, DAA2±. . . Two pairs of differential analog sound signals
FDAA1±、FDAA2±...兩對低通濾波差動類比聲音訊號FDAA1±, FDAA2±. . . Two pairs of low pass filtered differential analog sound signals
SD1±~SD4±...第一對合成差動訊號~第四對合成差動訊號SD1±~SD4±. . . The first pair of synthetic differential signals ~ the fourth pair of synthetic differential signals
5...網路線5. . . Web route
48...切換器48. . . Switcher
60...補償器60. . . Compensator
61...差動/單端訊號轉換模組61. . . Differential/single-ended signal conversion module
64...差動訊號接收器64. . . Differential signal receiver
STMDS(data)...TMDS資料訊號DD2±/DD3±S TMDS(data) . . . TMDS data signal DD2±/DD3±
Saudio...差動類比聲音訊號DAA1±/DAA2±S audio . . . Differential analog sound signal DAA1±/DAA2±
Smix...混合的高通濾波數位資料差動訊號FDD2±/FDD3±S mix . . . Mixed high-pass filtered digital data differential signal FDD2±/FDD3±
STMDS(CLK)...TMDS時脈訊號DC±S TMDS (CLK) . . . TMDS clock signal DC±
SSPDIF...SPDIF訊號S SPDIF . . . SPDIF signal
Smix(FDC)...混合的高通濾波數位時脈差動訊號FDC±S mix (FDC) . . . Mixed high-pass filtered digital clock differential signal FDC±
第1圖係繪示根據本發明之一實施例之訊號傳輸裝置的示意圖。1 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present invention.
第2圖係繪示本發明之另一實施例之訊號傳輸裝置的示意圖。Figure 2 is a schematic diagram showing a signal transmission device according to another embodiment of the present invention.
第3A與第3B圖係為合成差動訊號的示意圖。Figures 3A and 3B are schematic diagrams of synthetic differential signals.
第4圖係為本發明之訊號傳輸裝置之傳送器的示意圖。Figure 4 is a schematic illustration of the transmitter of the signal transmission device of the present invention.
1...第一電子裝置1. . . First electronic device
2...訊號傳輸裝置2. . . Signal transmission device
3...第二電子裝置3. . . Second electronic device
20...傳送器20. . . Transmitter
21...傳輸線twenty one. . . Transmission line
22...接收器twenty two. . . receiver
201...第一濾波模組201. . . First filter module
202...第二濾波模組202. . . Second filter module
221...第三濾波模組221. . . Third filter module
222...第四濾波模組222. . . Fourth filter module
DD±...一對數位差動訊號DD±. . . One-to-digit differential signal
FDD±...一對濾波數位差動訊號FDD±. . . a pair of filtered digital differential signals
SA...單端聲音訊號SA. . . Single-ended audio signal
DA±...一對差動聲音訊號DA±. . . a pair of differential sound signals
SD±...一對合成差動訊號SD±. . . a pair of synthetic differential signals
FDA±...一對濾波差動聲音訊號FDA±. . . Pair of filtered differential sound signals
203...單端/差動訊號轉換模組203. . . Single-ended/differential signal conversion module
223...差動/單端訊號轉換模組223. . . Differential/single-ended signal conversion module
Claims (28)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW100122483A TWI499302B (en) | 2011-06-27 | 2011-06-27 | Signal transmitting apparatus and transmitter and receiver thereof |
CN201110253958.8A CN102857754B (en) | 2011-06-27 | 2011-08-24 | Signal transmission device and transmitter and receiver thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW100122483A TWI499302B (en) | 2011-06-27 | 2011-06-27 | Signal transmitting apparatus and transmitter and receiver thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
TW201301890A true TW201301890A (en) | 2013-01-01 |
TWI499302B TWI499302B (en) | 2015-09-01 |
Family
ID=47403897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW100122483A TWI499302B (en) | 2011-06-27 | 2011-06-27 | Signal transmitting apparatus and transmitter and receiver thereof |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN102857754B (en) |
TW (1) | TWI499302B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI578126B (en) * | 2015-10-13 | 2017-04-11 | 大量科技股份有限公司 | Signal transmission apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017008196A1 (en) * | 2015-07-10 | 2017-01-19 | 海能达通信股份有限公司 | Circuit for inhibiting single-ended analogue signal noise, and terminal attachment |
TWI561073B (en) * | 2015-09-10 | 2016-12-01 | Aten Int Co Ltd | Multimedia signal transmission device and transmission method thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1238837C (en) * | 1996-10-15 | 2006-01-25 | 松下电器产业株式会社 | Image coding method and device |
US20070252659A1 (en) * | 2004-10-14 | 2007-11-01 | Hiroshi Suenaga | Filter Circuit, Differential Transmission System Having Same, and Power Supply |
TWI341688B (en) * | 2006-10-25 | 2011-05-01 | Mstar Semiconductor Inc | Television tuner |
TWI460995B (en) * | 2008-12-11 | 2014-11-11 | Silicon Image Inc | Power delivery over digital interaction interface for video and audio (diiva) |
-
2011
- 2011-06-27 TW TW100122483A patent/TWI499302B/en active
- 2011-08-24 CN CN201110253958.8A patent/CN102857754B/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI578126B (en) * | 2015-10-13 | 2017-04-11 | 大量科技股份有限公司 | Signal transmission apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN102857754A (en) | 2013-01-02 |
TWI499302B (en) | 2015-09-01 |
CN102857754B (en) | 2015-09-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI428749B (en) | Dongle module, console module, matrix kvm switch system, local-end module, remote-end module, and extender system | |
CN104125434B (en) | A kind of system of long range high definition transmission | |
WO2008056686A1 (en) | Communication system, transmitting device, receiving device, communication method, program and communication cable | |
KR20100106567A (en) | Method, apparatus and system for generating and facilitating mobile high-definition multimedia interface | |
CN101727873A (en) | Signal conversion apparatuses and display system | |
CN104135643B (en) | A kind of method and apparatus of long range high definition transmission | |
TWI532374B (en) | Signal transmitting apparatus and transmitter and receiver thereof | |
CN111163344A (en) | Long-distance double-screen interactive entertainment information processing system | |
WO2010041385A1 (en) | Video/audio transmission device and video/audio reception device | |
CN101729790A (en) | Matrix multi-computer switch system and signal extender system | |
TWI419545B (en) | Transmitter, receiver and extender system | |
TWI499302B (en) | Signal transmitting apparatus and transmitter and receiver thereof | |
CN100342715C (en) | High-definition multimedia interface branch apparatus | |
JP7452526B2 (en) | Transmitting device, transmitting method, receiving device and receiving method | |
CN103763608A (en) | Head-wearing audio and video device, audio and video transmission system and audio and video transmission method | |
CN112136176B (en) | Transmitting apparatus, transmitting method, receiving apparatus, and receiving method | |
CN202231794U (en) | HDMI converter | |
CN210629677U (en) | Ultra-high definition HDMI audio/video network cable extender | |
US20110051818A1 (en) | Power line transmission apparatus without public power system noise interference and method thereof | |
CN218450224U (en) | Multifunctional audio and video signal extension device | |
US9083488B1 (en) | Extender and method of recovering differential signal | |
JP5474253B1 (en) | Receiving apparatus and signal receiving method | |
JP5706012B2 (en) | Receiving apparatus and signal receiving method | |
WO2016052185A1 (en) | Transmission device, transmission method, receiving device and receiving method | |
CN101944347B (en) | Adaptor |