WO2022130130A1 - Circuit arrangement and method for transmitting tmds encoded signals - Google Patents

Circuit arrangement and method for transmitting tmds encoded signals Download PDF

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Publication number
WO2022130130A1
WO2022130130A1 PCT/IB2021/061472 IB2021061472W WO2022130130A1 WO 2022130130 A1 WO2022130130 A1 WO 2022130130A1 IB 2021061472 W IB2021061472 W IB 2021061472W WO 2022130130 A1 WO2022130130 A1 WO 2022130130A1
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WO
WIPO (PCT)
Prior art keywords
tmds
converter
electro
data
circuit arrangement
Prior art date
Application number
PCT/IB2021/061472
Other languages
French (fr)
Inventor
Martin Groepl
Boleslaw WOJTOWICZ
Original Assignee
Silicon Line Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Silicon Line Gmbh filed Critical Silicon Line Gmbh
Publication of WO2022130130A1 publication Critical patent/WO2022130130A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25751—Optical arrangements for CATV or video distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0264—Arrangements for coupling to transmission lines
    • H04L25/0272—Arrangements for coupling to multiple lines, e.g. for differential transmission
    • H04L25/0276—Arrangements for coupling common mode signals

Definitions

  • DVI Digital Visual Interface
  • HDMI High Definition Multimedia Interface
  • TMDS Transition-Minimized Differential Signaling
  • the present invention further relates to a method for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection.
  • Visual display units (flat) screens, displays, television sets and monitors with high resolution comprise an electrical connection interface, in particular in form of a DVI data transmitting interface and/or HDMI data transmitting interface.
  • an electrical connection interface in particular in form of a DVI data transmitting interface and/or HDMI data transmitting interface.
  • several differential TMDS encoded signals for the transmission of audio and video data as well as the required clock signal between at least one data source and at least one data sink are transmitted via this interface.
  • TMDS Transition-Minimized Differential Signaling
  • DVI Digital Visual Interface
  • HDMI High Definition Multimedia Interface
  • WO 2010/040816 A2 discloses a circuit arrangement as well as a method for transmitting such TMDS encoded signals from at least one data source to at least one data sink.
  • the solution as presented in WO 2010/040816 A2 enables the dispensability of an additional external current supply; this means that, according to WO 2010/040816 A2, the supply of the at least one driver circuit or of the at least one transimpedance converter circuit is effected exclusively by means of the voltages and currents provided at the connection interfaces, in particular at the DVI transmission interfaces or at the HDMI transmission interfaces, of the data source and of the data sink.
  • WO 2010/040816 A2 thus makes use of the fact that the current supply of the at least one driver circuit or of the at least one transimpedance converter circuit does not result from a (or even several) additional external current supply source(s) but can rather be provided by the connection interfaces of the data source or of the data sink.
  • WO 2010/040816 A2 represents a possibility to optically transmit the TMDS signals provided by the connection interface of the data source, without requiring an additional external current supply therefor.
  • WO 2010/040816 A2 suffered from an incomplete and inefficient use of the available electrical power provided by the HDMI data signal sink and being intended for powering a connected HDMI data signal source, said incomplete use of the electrical power having been due to a lack of a low complexity power transport mechanism from the data sink to the data source.
  • the technical object of the present invention is to provide a circuit arrangement and a method for inexpensively transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection.
  • the present invention provides a circuit arrangement for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection, said circuit arrangement comprising
  • electro-optical converter for electro-optically converting the electrical TMDS encoded signals
  • said electro-optical converter being assigned to the data source and being suppliable by a supply voltage, for example in the order of about five volt
  • said electro-optical converter comprising at least one light-emitting element, in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser
  • the electro-optically converted TMDS encoded signals are coupleable into at least one optical fibre, in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element,
  • At least one opto-electrical converter in particular in the form of at least one transimpedance converter circuit, for opto-electrically re-converting the TMDS encoded signals, said opto-electrical converter comprising at least one light-absorbing element, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre, said opto-electrical converter being assigned to the data sink and and being suppliable by the supply voltage, and
  • the common mode voltage connection may comprise one line or one wire.
  • the common mode voltage connection may comprise more than one line or more than one wire, said common mode voltage connection being embodied as at least one bus.
  • the bus may comprise eight lines or eight wires, in particular one for the respective direct current component superimposed on each of the transmitting signals.
  • the direct current component may be separated from the electrical TMDS encoded signals by means of at least one inductive element, in particular by means of at least one inductor or coil, being connected to the common mode voltage connection.
  • At least one capacitive element in particular at least one capacitor, may be connected upstream of the electro-optical converter.
  • At least one capacitive element in particular at least one capacitor, may be connected downstream of the opto-electrical converter.
  • the direct current component may be re-superimposed with the re-converted TMDS encoded signals by means of at least one inductive element, in particular by means of at least one inductor or coil, being connected to the common mode voltage connection.
  • At least one voltage regulator may be arranged between the electro-optical converter and the supply voltage.
  • At least one voltage regulator may be arranged between the opto-electrical converter and the supply voltage.
  • the electro-optical converter may be contained in at least one source-side connector or source-side plug.
  • the opto-electrical converter may be contained in at least one sink-side connector or sink-side plug.
  • the source-side connector or sourceside plug and the sink-side connector or sink-side plug may be the connector ends or plug ends of at least one active optical cable (AOC), in particular of at least one active optical transmission cable.
  • AOC active optical cable
  • the present invention further provides a method for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection,
  • the electrical TMDS encoded signals are electro-optically converted by means of at least one electro-optical converter, said electro-optical converter being assigned to the data source and being supplied with a supply voltage, for example in the order of about five volt, said electro-optical converter comprising at least one light-emitting element, in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser, wherein the electro-optically converted TMDS encoded signals are coupled into at least one optical fibre, in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element,
  • the TMDS encoded signals are opto-electrically re-converted by means of at least one opto- electrical converter, in particular in the form of at least one transimpedance converter circuit, said opto-electrical converter comprising at least one light-absorbing element, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre, said opto-electrical converter being assigned to the data sink and and being supplied with the supply voltage, and wherein, by means of at least one common mode voltage connection, a direct current component of the electrical TMDS encoded signals is transmitted between the data sink and the data source in parallel to the optical fibre.
  • the at least one common mode voltage connection enables a transmission of the direct current component superimposed on the electrical TMDS encoded signals between the data sink and the data source in parallel to the optical fibre(s).
  • common mode voltage connection in particular by its power transporting capability between the data source and the data sink via a direct current flowing through this common mode voltage connection, an incomplete and inefficient use of the available electrical power provided by the data sink can be avoided, i.e. there is a congruent amount of electrical power being drawn by the source through the TMDS connector pins and being available at the sink-side TMDS connector pins.
  • the common mode voltage connection is used to transport the electrical power provided by the signal sink, for example from the TV flat screen with very high resolution, to the signal source, for example to the Blu-ray player. (In this context, it may seem somewhat unusual to specify an electrical power flow in a direction opposite to the direction of the data signal flow; however, this is compliant with the HDMI specification.)
  • At least one cable-based connection can be implemented without the necessity of any further electrical supply - apart from the electrical supply anyway already present at the electrical contacts.
  • signals being TMDS encoded at least in part, in particular at least in a time slot manner can be transported by way of optical signal transmission from at least one data source to at least one data sink, in particular on the basis of at least one DVI data connection and/or of at least one HDMI data connection.
  • the optical signal transmission via glas fibre or via plastic material fibre, such as via plastic fibre represents a price-efficient alternative to high-quality expensive copper cables (, with said optical signal transmission causing a conversion of the electrical signal into an optical signal by means of at least one electro-optical converter and vice versa by means of at least one opto-electrical converter).
  • the present invention further relates to a cable connection for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection, comprising at least one circuit arrangement according to the above-mentioned type.
  • the provision of at least one such active optical transmission cable is based on the fact that the circuit arrangement, i. e. the at least one driver circuit and/or the at least one transimpedance converter circuit can be implemented in a very compact way, in particular without external current supply, such that the driver and/or the transimpedance converter can be integrated in a commercial, in particular conventional or regular, DVI connector or DVI plug and/or HDMI connector or HDMI plug.
  • HDTV High Definition Television
  • Blu-ray player Blu-ray player
  • at least one data sink in particular at least one HDTV data sink, for example at least one flat screen, such as at least one flat screen with very high resolution.
  • FIG. 1 in a conceptual schematic view a first exemplary embodiment of the circuit arrangement according to the present invention, said first exemplary embodiment being operated according to the method of the present invention;
  • FIG. 2 in a conceptual schematic view a second exemplary embodiment of the circuit arrangement according to the present invention, said second exemplary embodiment being operated according to the method of the present invention;
  • FIG. 3 in a conceptual schematic view a third exemplary embodiment of the circuit arrangement according to the present invention, said third exemplary embodiment being operated according to the method of the present invention.
  • FIG. 4 in a conceptual schematic view a fourth exemplary embodiment of the circuit arrangement according to the present invention, said fourth exemplary embodiment being operated according to the method of the present invention.
  • all signals used for the image data transmission of a DVI and/or HDMI connection are transmitted in this way via optical channels from the DVI/HDMI source to the DVI/HDMI sink.
  • circuit arrangement 100 to the first exemplary embodiment of a circuit arrangement 100 according to the present invention, as shown in Fig. 1 , as well as
  • circuit arrangement 100' to the second exemplary embodiment of a circuit arrangement 100' according to the present invention, as shown in Fig. 2, as well as
  • circuit arrangement 100" to the third exemplary embodiment of a circuit arrangement 100" according to the present invention, as shown in Fig. 3, as well as
  • the circuit arrangement 100, 100', 100", 100'” is provided for transmitting signals TMDS Data2+, TMDS Data2-, TMDS Data1+, TMDS Datal-, TMDS Data0+, TMDS DataO-, TMDS Clock+, TMDS Clock- from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection.
  • the circuit arrangement 100, 100', 100", 100'" comprises
  • electro-optical converter 12 for electro-optically converting the electrical TMDS encoded signals, said electro-optical converter 12 being assigned to the data source and being suppliable by a supply voltage line 70, for example in the order of about five volt, said electro-optical converter 12 comprising at least one light-emitting element 14, in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser, wherein the electro-optically converted TMDS encoded signals are coupleable into at least one optical fibre 30, in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element, and
  • At least one opto-electrical converter 42 in particular in the form of at least one transimpedance converter circuit, for opto-electrically re-converting the TMDS encoded signals, said opto-electrical converter 42 comprising at least one light-absorbing element 44, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre 30, said opto-electrical converter 42 being assigned to the data sink and and being suppliable by the supply voltage line 70.
  • At least one common mode voltage connection 60 is provided for transmitting a direct current (DC) component superimposed on the electrical TMDS encoded signals between the data sink and the data source in parallel to the optical fibre 30.
  • DC direct current
  • This common mode voltage connection 60 connection may comprise
  • the common mode voltage connection 60 is embodied as a common mode voltage bus wherein common mode voltage (VCM) bus or VCM bus here means a group of VCM wires running in parallel, with this common mode voltage bus or VCM bus being extendable or prolongable to one side or to both sides in the second exemplary embodiment 100' according to Fig. 2.
  • VCM common mode voltage
  • VCM wire (cf. first exemplary embodiment 100 according to Fig. 1) should be sufficient.
  • the somewhat better mutual decoupling of the data signals can be an aspect to use (up to eight) parallel VCM lines or parallel VCM wires as VCM bus 60.
  • this advantage rather seems too small to justify the higher complexity of the VCM bus 60 (cf. second exemplary embodiment 100' according to Fig. 2 or third exemplary embodiment 100" according to Fig. 3 and fourth exemplary embodiment 100'" according to Fig. 4) compared to the single VCM line or VCM wire (cf. first exemplary embodiment 100 according to Fig. 1).
  • the common mode voltage connection 60 comprises, the direct current (DC) component is separated from the electrical TMDS encoded signals by means of at least one inductive element 18, in particular by means of at least one inductor or coil, being connected to the common mode voltage connection 60.
  • DC direct current
  • the high-frequency data signals are prevented from flowing via the common mode voltage connection 60.
  • at least one capacitive element 16 in particular at least one coupling capacitor, is connected upstream of the electro-optical converter 12 for so-called alternating current (AC) coupling, and these high-frequency data signals are fed via said capacitive element 16 into the electro-optical converter 12, where these high-frequency data signals are converted into an optical signal which is transmitted via the optical fibre(s) 30 to the other end of the AOC hybrid cable to the opto-electrical converter 42 located there.
  • AC alternating current
  • the opto-electrical converter 42 converts the signals back into an electrical high-frequency data signal, similar to the electrical high-frequency data signal fed into the other end of the AOC hybrid cable from an HDMI signal source.
  • the coupling capacitive elements) 16 on the source-side connector or source-side plug 10 only allow(s) the high frequency data signals to pass to the electro-optical converter 12.
  • the coupling capacitive element(s) 46 at the sink-side connector or sink-side plug 40 only allow(s) the high-frequency data signals to flow from the opto-electrical converter 42 to the plug contacts of the HDMI connector or HDMI plug there.
  • the direct current (DC) component of the overall HDMI signal cannot flow via the capacitive elements and instead flows via the minimum one (cf. first exemplary embodiment 100 according to Fig. 1) up to maximum eight (cf. second exemplary embodiment 100' according to Fig. 2 or third exemplary embodiment 100" according to Fig. 3 and fourth exemplary embodiment 100"' according to Fig. 4) VCM lines or VCM wires to the opposite side.
  • Inductive elements at both ends of the AOC keep the VCM line(s) or VCM wire(s) free of high-frequency signals, since the inductive elements only allow the direct current (DC) component to flow freely.
  • At least one voltage regulator 20 may be arranged between the electro-optical converter 12 and the supply voltage line 70 (cf. fourth exemplary embodiment 100'" according to Fig. 4).
  • at least one voltage regulator 50 may be arranged between the opto-electrical converter 42 and the supply voltage line 70 (cf. fourth exemplary embodiment 100'" according to Fig. 4).
  • the electro-optical converter 12 may be contained in at least one source-side connector or source-side plug 10, and the opto-electrical converter 42 may be contained in at least one sink-side connector or sink-side plug 40.
  • the source-side connector or plug 10 and the sink-side connector or plug 40 are the connector ends or plug ends of at least one active optical cable (AOC), this enabling the use of the circuit arrangement 100, 100', 100", 100"' according to the present invention for the signal connection, in particular in at least one cable connection, for example in at least one active optical cable, such as in at least one active optical transmission cable, between at least one data source, in particular at least one HDTV data source, for example at least one Blu-ray player, and at least one data sink, in particular at least one HDTV data sink, for example at least one flat screen, such as at least one flat screen with very high resolution.
  • AOC active optical cable
  • the further connections in particular the further wires, for example +5V I GND I SDA I SCL I CEC I HEAC, as partially shown in Fig. 1 to Fig. 4, correspond to the specification of common or standard HDMI cables:
  • +5V refers to the supply voltage or supply voltage line 70.
  • GND refers to a reference potential, in particular to earth potential or to ground potential or to mass potential or to zero potential.
  • SDA refers to the serial data line(s) or serial data wire(s).
  • SCL refers to the serial clock line(s) or serial clock wire(s).
  • CEC refers to Consumer Electronics Control, being an HDMI feature designed to allow users to command and control up to for example fifteen CEC-enabled devices connected through HDMI, by using only one of their remote controls (for example by controlling a television set, set-top box, and DVD player using only the remote control of the television set).
  • CEC also allows for individual CEC- enabled devices to command and control each other without user intervention.
  • HEAC utilizes two lines from the connector: the previously unused Reserved Pin (called HEAC+) and the Hot Plug Detect pin (called HEAC-). If only ARC transmission is required, a single mode signal using the HEAC+ line can be used; otherwise, HEC is transmitted as a differential signal over the pair of lines, and ARC as a common mode component of the pair.
  • the circuitry 100, 100', 100", 100'" transmits the electrical HDMI signals split in such way that the direct current (DC) components flow over one wire or line (cf. first exemplary embodiment 100 according to Fig. 1 or second exemplary embodiment 100' according to Fig. 2) up to several, in particular eight, parallel wires or lines (cf. third exemplary embodiment 100" according to Fig. 3 and fourth exemplary embodiment 100'" according to Fig. 4) while the data signals are split off, optically transmitted, and at the other end recombined with the DC components.
  • DC direct current
  • light-emitting element in particular light diode, light-emitting diode, laser diode or laser, for example semiconductor laser
  • inductive element in particular inductor or coil, assigned to source-side connector or sourceside plug 10
  • optical fibre in particular glass fibre or plastic material fibre, for example plastic fiber
  • GND reference potential in particular earth potential or ground potential or mass potential or zero potential

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

In order to inexpensively transmit signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, the present invention proposes a circuit arrangement (100; 100'; 100''; 100''') for transmitting signals (TMDS Data2+, TMDS Data2-, TMDS Data1+, TMDS Data1-, TMDS Data0+, TMDS Data0-, TMDS Clock+, TMDS Clock-) from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection, said circuit arrangement (100; 100'; 100''; 100''') comprising- at least one electro-optical converter (12) for electro-optically converting the electrical TMDS encoded signals, said electro-optical converter (12) being assigned to the data source and being suppliable by a supply voltage (70), for example in the order of about five volt, said electro-optical converter (12) comprising at least one light-emitting element (14), in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser, wherein the electro-optically converted TMDS encoded signals are coupleable into at least one optical fibre (30), in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element,- at least one opto-electrical converter (42), in particular in the form of at least one transimpedance converter circuit, for opto-electrically re-converting the TMDS encoded signals, said opto-electrical converter (42) comprising at least one light-absorbing element, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre (30), said opto-electrical converter (42) being assigned to the data sink and and being suppliable by the supply voltage (70), andat least one common mode voltage connection (60) for transmitting a direct current component of the electrical TMDS encoded signals between the data sink and the data source in parallel to the optical fibre (30).A corresponding method for transmitting signals from at least one data source to at least one data sink is also proposed.

Description

C I R C U I T A R R A N G E M E N T A N D M E T H O D F O R T R A N S M I T T I N G T M D S E N C O D E D S I G N A L S
Technical field
The present invention relates to a circuit arrangement for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection (DVI = Digital Visual Interface; HDMI = High Definition Multimedia Interface; TMDS = Transition-Minimized Differential Signaling).
The present invention further relates to a method for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection.
Technological background and prior art
Visual display units, (flat) screens, displays, television sets and monitors with high resolution comprise an electrical connection interface, in particular in form of a DVI data transmitting interface and/or HDMI data transmitting interface. In addition to various control signals, several differential TMDS encoded signals for the transmission of audio and video data as well as the required clock signal between at least one data source and at least one data sink are transmitted via this interface.
In this connection, TMDS (= Transition-Minimized Differential Signaling) is basically a digital transmission standard for uncompressed multimedia data, having been developed to eliminate electromagnetic disturbances occurring at analogue transmission; in this way, TMDS is used for instance at DVI transmissions (DVI = Digital Visual Interface) and/or at HDMI transmissions (HDMI = High Definition Multimedia Interface) in order to control screens with very high resolution, wherein TMDS encoded signals may comprise data rates in the region of several gigabits per second.
In this context, prior art reference WO 2010/040816 A2 discloses a circuit arrangement as well as a method for transmitting such TMDS encoded signals from at least one data source to at least one data sink. The solution as presented in WO 2010/040816 A2 enables the dispensability of an additional external current supply; this means that, according to WO 2010/040816 A2, the supply of the at least one driver circuit or of the at least one transimpedance converter circuit is effected exclusively by means of the voltages and currents provided at the connection interfaces, in particular at the DVI transmission interfaces or at the HDMI transmission interfaces, of the data source and of the data sink.
WO 2010/040816 A2 thus makes use of the fact that the current supply of the at least one driver circuit or of the at least one transimpedance converter circuit does not result from a (or even several) additional external current supply source(s) but can rather be provided by the connection interfaces of the data source or of the data sink.
With external current supply sources having turned out to be technically intricate in the field of consumer electronics, WO 2010/040816 A2 represents a possibility to optically transmit the TMDS signals provided by the connection interface of the data source, without requiring an additional external current supply therefor.
However, WO 2010/040816 A2 suffered from an incomplete and inefficient use of the available electrical power provided by the HDMI data signal sink and being intended for powering a connected HDMI data signal source, said incomplete use of the electrical power having been due to a lack of a low complexity power transport mechanism from the data sink to the data source.
Disclosure of the present invention: object, solution, advantages
Starting from the above-explained disadvantages and inadequacies and in consideration of the prior art outlined, the technical object of the present invention is to provide a circuit arrangement and a method for inexpensively transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection.
This object is achieved by a circuit arrangement with the features disclosed in claim 1 and by a method with the features disclosed in claim 14. Advantageous embodiments and expedient developments of the present invention are characterized in the respective dependent claims.
The present invention provides a circuit arrangement for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection, said circuit arrangement comprising
- at least one electro-optical converter for electro-optically converting the electrical TMDS encoded signals, said electro-optical converter being assigned to the data source and being suppliable by a supply voltage, for example in the order of about five volt, said electro-optical converter comprising at least one light-emitting element, in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser, wherein the electro-optically converted TMDS encoded signals are coupleable into at least one optical fibre, in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element,
- at least one opto-electrical converter, in particular in the form of at least one transimpedance converter circuit, for opto-electrically re-converting the TMDS encoded signals, said opto-electrical converter comprising at least one light-absorbing element, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre, said opto-electrical converter being assigned to the data sink and and being suppliable by the supply voltage, and
- at least one common mode voltage connection for transmitting a direct current component of the electrical TMDS encoded signals between the data sink and the data source in parallel to the optical fibre.
In an advantageous embodiment of the present invention, the common mode voltage connection may comprise one line or one wire.
According to an expedient implementation of the present invention, the common mode voltage connection may comprise more than one line or more than one wire, said common mode voltage connection being embodied as at least one bus.
In a favoured embodiment of the present invention, the bus may comprise eight lines or eight wires, in particular one for the respective direct current component superimposed on each of the transmitting signals.
According to a preferred implementation of the present invention, the direct current component may be separated from the electrical TMDS encoded signals by means of at least one inductive element, in particular by means of at least one inductor or coil, being connected to the common mode voltage connection.
According to an advantageous implementation of the present invention, at least one capacitive element, in particular at least one capacitor, may be connected upstream of the electro-optical converter.
In an expedient embodiment of the present invention, at least one capacitive element, in particular at least one capacitor, may be connected downstream of the opto-electrical converter.
According to a favoured implementation of the present invention, the direct current component may be re-superimposed with the re-converted TMDS encoded signals by means of at least one inductive element, in particular by means of at least one inductor or coil, being connected to the common mode voltage connection.
In a preferred embodiment of the present invention, at least one voltage regulator may be arranged between the electro-optical converter and the supply voltage.
In an advantageous embodiment of the present invention, at least one voltage regulator may be arranged between the opto-electrical converter and the supply voltage.
According to an expedient implementation of the present invention, the electro-optical converter may be contained in at least one source-side connector or source-side plug.
In a favoured embodiment of the present invention, the opto-electrical converter may be contained in at least one sink-side connector or sink-side plug.
According to a preferred implementation of the present invention, the source-side connector or sourceside plug and the sink-side connector or sink-side plug may be the connector ends or plug ends of at least one active optical cable (AOC), in particular of at least one active optical transmission cable.
The present invention further provides a method for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection,
- wherein the electrical TMDS encoded signals are electro-optically converted by means of at least one electro-optical converter, said electro-optical converter being assigned to the data source and being supplied with a supply voltage, for example in the order of about five volt, said electro-optical converter comprising at least one light-emitting element, in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser, wherein the electro-optically converted TMDS encoded signals are coupled into at least one optical fibre, in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element,
- wherein the TMDS encoded signals are opto-electrically re-converted by means of at least one opto- electrical converter, in particular in the form of at least one transimpedance converter circuit, said opto-electrical converter comprising at least one light-absorbing element, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre, said opto-electrical converter being assigned to the data sink and and being supplied with the supply voltage, and wherein, by means of at least one common mode voltage connection, a direct current component of the electrical TMDS encoded signals is transmitted between the data sink and the data source in parallel to the optical fibre.
In the present invention, the at least one common mode voltage connection enables a transmission of the direct current component superimposed on the electrical TMDS encoded signals between the data sink and the data source in parallel to the optical fibre(s). By such common mode voltage connection, in particular by its power transporting capability between the data source and the data sink via a direct current flowing through this common mode voltage connection, an incomplete and inefficient use of the available electrical power provided by the data sink can be avoided, i.e. there is a congruent amount of electrical power being drawn by the source through the TMDS connector pins and being available at the sink-side TMDS connector pins.
The common mode voltage connection is used to transport the electrical power provided by the signal sink, for example from the TV flat screen with very high resolution, to the signal source, for example to the Blu-ray player. (In this context, it may seem somewhat unusual to specify an electrical power flow in a direction opposite to the direction of the data signal flow; however, this is compliant with the HDMI specification.)
Using the circuit arrangement and the circuit technology according to the present invention, at least one cable-based connection can be implemented without the necessity of any further electrical supply - apart from the electrical supply anyway already present at the electrical contacts.
More specifically, by means of the circuit arrangement according to the present invention and by means of the method according to the present invention, signals being TMDS encoded at least in part, in particular at least in a time slot manner, can be transported by way of optical signal transmission from at least one data source to at least one data sink, in particular on the basis of at least one DVI data connection and/or of at least one HDMI data connection.
In this connection, the optical signal transmission via glas fibre or via plastic material fibre, such as via plastic fibre, represents a price-efficient alternative to high-quality expensive copper cables (, with said optical signal transmission causing a conversion of the electrical signal into an optical signal by means of at least one electro-optical converter and vice versa by means of at least one opto-electrical converter).
The present invention further relates to a cable connection for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection, comprising at least one circuit arrangement according to the above-mentioned type.
According to the invention, the provision of at least one such active optical transmission cable is based on the fact that the circuit arrangement, i. e. the at least one driver circuit and/or the at least one transimpedance converter circuit can be implemented in a very compact way, in particular without external current supply, such that the driver and/or the transimpedance converter can be integrated in a commercial, in particular conventional or regular, DVI connector or DVI plug and/or HDMI connector or HDMI plug.
The present invention finally relates to the use of at least one circuit arrangement according to the above-mentioned type and/or of a method according to the above-mentioned type for the signal connection, in particular in at least one cable connection, for example in at least one active optical cable, such as in at least one active optical transmission cable, between at least one data source, in particular at least one HDTV data source (HDTV = High Definition Television), for example at least one Blu-ray player, and at least one data sink, in particular at least one HDTV data sink, for example at least one flat screen, such as at least one flat screen with very high resolution.
Brief explanation of the drawings
As already discussed above, there are various possibilities for embodying and further developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand reference is made to the claims dependent on claim 1 and on claim 14, and on the other hand further embodiments, features and advantages of the present invention are explained in greater detail below, inter alia by way of the four exemplary embodiments illustrated by Fig. 1 to Fig. 4.
It is shown in:
Fig. 1 in a conceptual schematic view a first exemplary embodiment of the circuit arrangement according to the present invention, said first exemplary embodiment being operated according to the method of the present invention;
Fig. 2 in a conceptual schematic view a second exemplary embodiment of the circuit arrangement according to the present invention, said second exemplary embodiment being operated according to the method of the present invention;
Fig. 3 in a conceptual schematic view a third exemplary embodiment of the circuit arrangement according to the present invention, said third exemplary embodiment being operated according to the method of the present invention; and
Fig. 4 in a conceptual schematic view a fourth exemplary embodiment of the circuit arrangement according to the present invention, said fourth exemplary embodiment being operated according to the method of the present invention.
Like or similar embodiments, elements or features are provided with identical reference numerals in Fig. 1 to Fig. 4.
Best way for embodying the present invention
- By means of the first exemplary embodiment of the circuit arrangement 100 according to the present invention,
- by means of the second exemplary embodiment of the circuit arrangement 100' according to the present invention,
- by means of the third exemplary embodiment of the circuit arrangement 100" according to the present invention, and
- by means of the fourth exemplary embodiment of the circuit arrangement 100"' according to the present invention, it is basically possible to implement and to operate a cable-based connection without the necessity of any further electrical supply - apart from the electrical supply anyway already present at the electrical contacts - and thus to fit in at least one DVI and/or HDMI transmission channel of an active optical transmission cable without any difficulties, without the necessity of modifying the existing connection interface(s) of the data source and the existing connection interface(s) of the data sink or without the necessity of operating these interfaces beyond the specifications allowed.
In a particularity preferred embodiment, all signals used for the image data transmission of a DVI and/or HDMI connection are transmitted in this way via optical channels from the DVI/HDMI source to the DVI/HDMI sink.
In order to avoid superfluous repetitions, the following explanations regarding the embodiments, features and advantages of the present invention - unless specified otherwise - relate
- to the first exemplary embodiment of a circuit arrangement 100 according to the present invention, as shown in Fig. 1 , as well as
- to the second exemplary embodiment of a circuit arrangement 100' according to the present invention, as shown in Fig. 2, as well as
- to the third exemplary embodiment of a circuit arrangement 100" according to the present invention, as shown in Fig. 3, as well as
-to the fourth exemplary embodiment of a circuit arrangement 100'" according to the present invention, as shown in Fig. 4.
In this connection, the circuit arrangement 100, 100', 100", 100'" is provided for transmitting signals TMDS Data2+, TMDS Data2-, TMDS Data1+, TMDS Datal-, TMDS Data0+, TMDS DataO-, TMDS Clock+, TMDS Clock- from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection.
The circuit arrangement 100, 100', 100", 100'" comprises
- at least one electro-optical converter 12 for electro-optically converting the electrical TMDS encoded signals, said electro-optical converter 12 being assigned to the data source and being suppliable by a supply voltage line 70, for example in the order of about five volt, said electro-optical converter 12 comprising at least one light-emitting element 14, in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser, wherein the electro-optically converted TMDS encoded signals are coupleable into at least one optical fibre 30, in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element, and
- at least one opto-electrical converter 42, in particular in the form of at least one transimpedance converter circuit, for opto-electrically re-converting the TMDS encoded signals, said opto-electrical converter 42 comprising at least one light-absorbing element 44, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre 30, said opto-electrical converter 42 being assigned to the data sink and and being suppliable by the supply voltage line 70.
At least one common mode voltage connection 60 is provided for transmitting a direct current (DC) component superimposed on the electrical TMDS encoded signals between the data sink and the data source in parallel to the optical fibre 30.
This common mode voltage connection 60 connection may comprise
- one line or one wire (cf. first exemplary embodiment 100 according to Fig. 1), or
- more than one line or more than one wire (cf. second exemplary embodiment 100' according to Fig. 2 or third exemplary embodiment 100" according to Fig. 3 or fourth exemplary embodiment 100"' according to Fig. 4) , for example eight lines or eight wires for the respective direct current (DC) component superimposed on each of the eight signals TMDS Data2+, TMDS Data2-, TMDS Data1 +, TMDS Datal-, TMDS Data0+, TMDS DataO-, TMDS Clock+, TMDS Clock-.
In other words,
- in the second exemplary embodiment 100' according to Fig. 2,
- in the third exemplary embodiment 100" according to Fig. 3, and
- in the fourth exemplary embodiment 100'" according to Fig. 4, the common mode voltage connection 60 is embodied as a common mode voltage bus wherein common mode voltage (VCM) bus or VCM bus here means a group of VCM wires running in parallel, with this common mode voltage bus or VCM bus being extendable or prolongable to one side or to both sides in the second exemplary embodiment 100' according to Fig. 2.
Under normal circumstances, one VCM wire (cf. first exemplary embodiment 100 according to Fig. 1) should be sufficient. However, the somewhat better mutual decoupling of the data signals can be an aspect to use (up to eight) parallel VCM lines or parallel VCM wires as VCM bus 60. However, there may be implementations or situations where this advantage rather seems too small to justify the higher complexity of the VCM bus 60 (cf. second exemplary embodiment 100' according to Fig. 2 or third exemplary embodiment 100" according to Fig. 3 and fourth exemplary embodiment 100'" according to Fig. 4) compared to the single VCM line or VCM wire (cf. first exemplary embodiment 100 according to Fig. 1).
Independently of the number of lines or wires the common mode voltage connection 60 comprises, the direct current (DC) component is separated from the electrical TMDS encoded signals by means of at least one inductive element 18, in particular by means of at least one inductor or coil, being connected to the common mode voltage connection 60.
By said inductive element 18 at each end of the cable, the high-frequency data signals are prevented from flowing via the common mode voltage connection 60. Instead, at least one capacitive element 16, in particular at least one coupling capacitor, is connected upstream of the electro-optical converter 12 for so-called alternating current (AC) coupling, and these high-frequency data signals are fed via said capacitive element 16 into the electro-optical converter 12, where these high-frequency data signals are converted into an optical signal which is transmitted via the optical fibre(s) 30 to the other end of the AOC hybrid cable to the opto-electrical converter 42 located there.
The opto-electrical converter 42 converts the signals back into an electrical high-frequency data signal, similar to the electrical high-frequency data signal fed into the other end of the AOC hybrid cable from an HDMI signal source. The coupling capacitive elements) 16 on the source-side connector or source-side plug 10 only allow(s) the high frequency data signals to pass to the electro-optical converter 12.
The coupling capacitive element(s) 46 at the sink-side connector or sink-side plug 40 only allow(s) the high-frequency data signals to flow from the opto-electrical converter 42 to the plug contacts of the HDMI connector or HDMI plug there.
In other words, the direct current (DC) component of the overall HDMI signal cannot flow via the capacitive elements and instead flows via the minimum one (cf. first exemplary embodiment 100 according to Fig. 1) up to maximum eight (cf. second exemplary embodiment 100' according to Fig. 2 or third exemplary embodiment 100" according to Fig. 3 and fourth exemplary embodiment 100"' according to Fig. 4) VCM lines or VCM wires to the opposite side. Inductive elements at both ends of the AOC keep the VCM line(s) or VCM wire(s) free of high-frequency signals, since the inductive elements only allow the direct current (DC) component to flow freely.
In order to regulate the voltage, in particular the supply voltage 70, at least one voltage regulator 20 may be arranged between the electro-optical converter 12 and the supply voltage line 70 (cf. fourth exemplary embodiment 100'" according to Fig. 4). Alternatively or in addition, at least one voltage regulator 50 may be arranged between the opto-electrical converter 42 and the supply voltage line 70 (cf. fourth exemplary embodiment 100'" according to Fig. 4).
In order to provide a cable-based connection, the electro-optical converter 12 may be contained in at least one source-side connector or source-side plug 10, and the opto-electrical converter 42 may be contained in at least one sink-side connector or sink-side plug 40. In such way, the source-side connector or plug 10 and the sink-side connector or plug 40 are the connector ends or plug ends of at least one active optical cable (AOC), this enabling the use of the circuit arrangement 100, 100', 100", 100"' according to the present invention for the signal connection, in particular in at least one cable connection, for example in at least one active optical cable, such as in at least one active optical transmission cable, between at least one data source, in particular at least one HDTV data source, for example at least one Blu-ray player, and at least one data sink, in particular at least one HDTV data sink, for example at least one flat screen, such as at least one flat screen with very high resolution.
The further connections, in particular the further wires, for example +5V I GND I SDA I SCL I CEC I HEAC, as partially shown in Fig. 1 to Fig. 4, correspond to the specification of common or standard HDMI cables:
+5V refers to the supply voltage or supply voltage line 70.
GND refers to a reference potential, in particular to earth potential or to ground potential or to mass potential or to zero potential.
SDA refers to the serial data line(s) or serial data wire(s).
SCL refers to the serial clock line(s) or serial clock wire(s).
CEC refers to Consumer Electronics Control, being an HDMI feature designed to allow users to command and control up to for example fifteen CEC-enabled devices connected through HDMI, by using only one of their remote controls (for example by controlling a television set, set-top box, and DVD player using only the remote control of the television set). CEC also allows for individual CEC- enabled devices to command and control each other without user intervention.
HEAC refers to HDMI Ethernet and Audio Return Channel, adding a high-speed bidirectional data communication link (HEC) and the ability to send audio data upstream to the source device (ARC = Audio Return Channel). HEAC utilizes two lines from the connector: the previously unused Reserved Pin (called HEAC+) and the Hot Plug Detect pin (called HEAC-). If only ARC transmission is required, a single mode signal using the HEAC+ line can be used; otherwise, HEC is transmitted as a differential signal over the pair of lines, and ARC as a common mode component of the pair.
In summary, the circuitry 100, 100', 100", 100'" according to the present invention transmits the electrical HDMI signals split in such way that the direct current (DC) components flow over one wire or line (cf. first exemplary embodiment 100 according to Fig. 1 or second exemplary embodiment 100' according to Fig. 2) up to several, in particular eight, parallel wires or lines (cf. third exemplary embodiment 100" according to Fig. 3 and fourth exemplary embodiment 100'" according to Fig. 4) while the data signals are split off, optically transmitted, and at the other end recombined with the DC components. List of reference signs
100 circuit arrangement (= first embodiment; cf. Fig. 1)
100' circuit arrangement (= second embodiment; cf. Fig. 2)
100" circuit arrangement (= third embodiment; cf. Fig. 3)
100"' circuit arrangement (= fourth embodiment; cf. Fig. 4)
10 source-side connector or source-side plug
12 electro-optical converter
14 light-emitting element, in particular light diode, light-emitting diode, laser diode or laser, for example semiconductor laser
16 capacitive element, in particular capacitor, assigned to electro-optical converter 12
18 inductive element, in particular inductor or coil, assigned to source-side connector or sourceside plug 10
20 voltage regulator, assigned to electro-optical converter 12
30 optical fibre, in particular glass fibre or plastic material fibre, for example plastic fiber
40 sink-side connector or sink-side plug
42 opto-electrical converter
44 light-absorbing element, in particular photodiode
46 capacitive element, in particular capacitor, assigned to opto-electrical converter 42
48 inductive element, in particular inductor or coil, assigned to sink-side connector or sink-side plug 40
50 voltage regulator, assigned to opto-electrical converter 42
60 common mode voltage connection, in particular common mode voltage bus
70 supply voltage, in particular supply voltage line
ARC Audio Return Channel
CEC Consumer Electronics Control
DDC Display Data Channel
GND reference potential, in particular earth potential or ground potential or mass potential or zero potential
TMDS transition minimized differential signaling

Claims

Claims
1. A circuit arrangement (100; 100'; 100"; 100"') for transmitting signals (TMDS Data2+, TMDS Data2-, TMDS Data1+, TMDS Datal-, TMDS DataO+, TMDS DataO-, TMDS Clock+, TMDS Clock-) from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection, said circuit arrangement (100; 100'; 100"; 100'") comprising at least one electro-optical converter (12) for electro-optically converting the electrical TMDS encoded signals, said electro-optical converter (12) being assigned to the data source and being suppliable by a supply voltage (70), for example in the order of about five volt, said electro-optical converter (12) comprising at least one light-emitting element (14), in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser, wherein the electro-optically converted TMDS encoded signals are coupleable into at least one optical fibre (30), in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element, and at least one opto-electrical converter (42), in particular in the form of at least one transimpedance converter circuit, for opto-electrically re-converting the TMDS encoded signals, said opto- electrical converter (42) comprising at least one light-absorbing element, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre (30), said opto- electrical converter (42) being assigned to the data sink and and being suppliable by the supply voltage (70), c h a r a c t e r i z e d b y at least one common mode voltage connection (60) for transmitting a direct current component of the electrical TMDS encoded signals between the data sink and the data source in parallel to the optical fibre (30).
2. The circuit arrangement according to claim 1 , characterized in that the common mode voltage connection (60) comprises one line or one wire.
3. The circuit arrangement according to claim 1 , characterized in that the common mode voltage connection (60) comprises more than one line or more than one wire, said common mode voltage connection (60) being embodied as at least one bus.
4. The circuit arrangement according to claim 3, characterized in that the bus comprises eight lines or eight wires, in particular one for the respective direct current component superimposed on each of the transmitting signals (TMDS Data2+, TMDS Data2-, TMDS Data1+, TMDS Datal-, TMDS Data0+, TMDS DataO-, TMDS Clock+, TMDS Clock-). The circuit arrangement according to at least one of claims 1 to 4, characterized in that the direct current component is separated from the electrical TMDS encoded signals by means of at least one inductive element (18), in particular by means of at least one inductor or coil, being connected to the common mode voltage connection (60). The circuit arrangement according to at least one of claims 1 to 5, characterized in that at least one capacitive element (16), in particular at least one capacitor, is connected upstream of the electro-optical converter (12). The circuit arrangement according to at least one of claims 1 to 6, characterized in that at least one capacitive element (46), in particular at least one capacitor, is connected downstream of the opto-electrical converter (42). The circuit arrangement according to at least one of claims 1 to 7, characterized in that the direct current component is re-superimposed with the re-converted TMDS encoded signals by means of at least one inductive element (48), in particular by means of at least one inductor or coil, being connected to the common mode voltage connection (60). The circuit arrangement according to at least one of claims 1 to 8, characterized by at least one voltage regulator (20) arranged between the electro-optical converter (12) and the supply voltage (70). The circuit arrangement according to at least one of claims 1 to 9, characterized by at least one voltage regulator (50) arranged between the opto-electrical converter (42) and the supply voltage (70). The circuit arrangement according to at least one of claims 1 to 10, characterized in that the electro-optical converter (12) is contained in at least one source-side connector or source-side Plug (10). The circuit arrangement according to at least one of claims 1 to 11 , characterized in that the opto- electrical converter (42) is contained in at least one sink-side connector or sink-side plug (40). The circuit arrangement according to claims 11 and 12, characterized in that the source-side connector or source-side plug (10) and the sink-side connector or sink-side plug (40) are the connector ends or plug ends of at least one active optical cable, in particular of at least one active optical transmission cable. A method for transmitting signals from at least one data source to at least one data sink, said signals being TMDS encoded at least in part, in particular at least in a time slot manner, and in particular being assigned to at least one DVI data connection and/or to at least one HDMI data connection, wherein the electrical TMDS encoded signals are electro-optically converted by means of at least one electro-optical converter (12), said electro-optical converter (12) being assigned to the data source and being supplied with a supply voltage (70), for example in the order of about five volt, said electro-optical converter (12) comprising at least one light-emitting element, in particular at least one light diode, at least one light-emitting diode, at least one laser diode or at least one laser, for example at least one semiconductor laser, wherein the electro-optically converted TMDS encoded signals are coupled into at least one optical fibre (30), in particular into at least one glass fibre or into at least one plastic material fibre, for example into at least one plastic fiber, by means of said light-emitting element, and wherein the TMDS encoded signals are opto-electrically re-converted by means of at least one opto-electrical converter (42), in particular in the form of at least one transimpedance converter circuit, said opto-electrical converter (42) comprising at least one light-absorbing element, in particular at least one photodiode, for coupling the TMDS encoded signals out from the optical fibre (30), said opto-electrical converter (42) being assigned to the data sink and and being supplied with the supply voltage (70), and wherein, by means of at least one common mode voltage connection (60), a direct current component of the electrical TMDS encoded signals is transmitted between the data sink and the data source in parallel to the optical fibre (30). Use of at least one circuit arrangement (100; 100'; 100"; 100"') according to at least one of claims 1 to 13 and/or of a method according to claim 14 for the signal connection, in particular in at least one cable connection, for example in at least one active optical cable, such as in at least one active optical transmission cable, between at least one data source, in particular at least one HDTV data source, for example at least one Blu-ray player, and at least one data sink, in particular at least one HDTV data sink, for example at least one flat screen, such as at least one flat screen with very high resolution.
14
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WO2010040816A2 (en) 2008-10-09 2010-04-15 Silicon Line Gmbh Circuit arrangement and method for transmitting tmds encoded signals
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WO2010040816A2 (en) 2008-10-09 2010-04-15 Silicon Line Gmbh Circuit arrangement and method for transmitting tmds encoded signals
US20100316141A1 (en) * 2009-06-15 2010-12-16 Howard Vincent Derby Method and Apparatus for Extending Receiver-Biased Digital Links
US20200092621A1 (en) * 2018-09-14 2020-03-19 Kabushiki Kaisha Toshiba Connector device and transmission cable

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