CN113872660A - Signal enhancement relay device and method - Google Patents
Signal enhancement relay device and method Download PDFInfo
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- CN113872660A CN113872660A CN202010619798.3A CN202010619798A CN113872660A CN 113872660 A CN113872660 A CN 113872660A CN 202010619798 A CN202010619798 A CN 202010619798A CN 113872660 A CN113872660 A CN 113872660A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 117
- 238000012545 processing Methods 0.000 claims abstract description 40
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000012549 training Methods 0.000 claims description 34
- 238000012546 transfer Methods 0.000 claims 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
- H04B7/15542—Selecting at relay station its transmit and receive resources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15557—Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
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Abstract
A signal enhancement relay device. The display data channel extension circuit includes: direct channels and indirect channels. The direct channel is provided with a path monitoring circuit. The indirect path includes master and slave paths with master and slave transmission circuits respectively disposed therein. The direct channel is selected in a preset passive mode, and the monitoring link bridging processing circuit is enabled to monitor the display data transmission on the direct path through the path monitoring circuit so as to carry out a channel link program of the corresponding data enhancement transmission channel. When the channel link procedure in the passive mode fails, the indirect channel is selected in the active mode, and the intervening link bridge processing circuit is enabled to access display data transmission on the master and slave paths through the master and slave transmission circuits, respectively, to perform the channel link procedure corresponding to the data enhanced transmission channel with the endpoint, respectively.
Description
Technical Field
The present invention relates to image transmission technologies, and in particular, to a signal enhancement relay device and method.
Background
In compliance with the trend of high-definition digital image, image data needs higher speed and larger bandwidth transmission mechanism for transmission. High Definition Multimedia Interface (HDMI) is one of the interfaces that are often used at present. Among them, HDMI 2.1, which has a high-speed transmission bandwidth of 12Gbps and can support a high-resolution picture up to 10K, has gradually become the mainstream.
To extend the transmission distance and stabilize the signal quality, relay devices such as a redrive circuit (driver) or a retimer circuit (timer) may be used to enhance the data. In order for the relay device to operate, the relay device needs to link the relayed endpoint devices through a technique of bridging. However, the current bridging technology is often inefficient on the link or is prone to reduce the probability of successful link connection due to poor routing or response delay between the relay device and the endpoint device.
Disclosure of Invention
In view of the problems of the prior art, an object of the present invention is to provide a signal enhancement relay apparatus and method to improve the prior art.
An embodiment of a signal enhancement (enhancement) relay device for linking a display transmitter and a display receiver includes: the device comprises a display data channel extension circuit, a data enhancement transmission channel, a monitoring link bridge processing circuit and an intervention link bridge processing circuit. The display data channel extension circuit includes: direct channels and indirect channels. The direct channel includes a direct path and a path snoop (snoop) circuit electrically coupled to the direct path. The indirect channel includes a master path provided with a master transmission circuit and a slave path provided with a slave transmission circuit. The snoop link bridge processing circuit is electrically coupled to the path snoop circuit. The intervening link bridge processing circuit is electrically coupled to the master transmission circuit and the slave transmission circuit. The direct channel is selected in a preset passive mode so that the direct path is directly and electrically coupled to the display receiving device and the display transmitting device, and the monitoring link bridging processing circuit is started to monitor display data transmission on the direct path through the path monitoring circuit so as to carry out a channel link program corresponding to the data enhancement transmission channel. When the channel link procedure in the passive mode fails, the indirect channel is selected in the active mode such that the master path and the slave path are electrically coupled to the display receiving device and the display transmitting device, respectively, and the intervening link bridge processing circuit is enabled to access display data transmission on the master path and the slave path through the master transmission circuit and the slave transmission circuit, respectively, to perform the channel link procedure.
Another objective of the present invention is to provide a signal enhancement relay method applied in a signal enhancement relay device, where the signal enhancement relay device is used to link a display transmitting apparatus and a display receiving apparatus, and an embodiment of the signal enhancement relay method includes: in a preset passive mode, selecting a direct channel of the display data channel extension circuit to be electrically coupled to the display receiving device and the display transmitting device, wherein the direct channel comprises a direct path electrically coupled with the display receiving device and the display transmitting device directly and a path monitoring circuit electrically coupled to the direct path; in the passive mode, starting a monitoring link bridging processing circuit electrically coupled to the path monitoring circuit to monitor display data transmission on the direct path through the path monitoring circuit so as to carry out a channel linking program corresponding to the data enhancement transmission channel; judging whether a channel link program in the passive mode fails or not; when the channel link procedure in the passive mode fails, in the active mode, selecting an indirect channel of the display data channel extension circuit to electrically couple to the display receiving device and the display transmitting device, wherein the indirect channel comprises a master path provided with a master transmission circuit and electrically coupled to the display receiving device and a slave path provided with a slave transmission circuit and electrically coupled to the display transmitting device; and in the active mode, enabling an intervening link bridge processing circuit electrically coupled to the master transmission circuit and the slave transmission circuit to access display data transmission on the master and slave paths respectively through the master and slave transmission circuits for performing a channel linking procedure.
The features, embodiments, and technical effects of the present invention are described in detail as preferred embodiments with reference to the accompanying drawings.
Drawings
Fig. 1 is a block diagram of a signal enhancement relay device according to an embodiment of the present invention;
FIG. 2A is a simplified block diagram of a signal enhancement relay device in a passive mode according to an embodiment of the present invention;
FIG. 2B is a simplified block diagram of a signal enhancing relay device in an active mode according to an embodiment of the present invention; and
fig. 3 is a flowchart illustrating a signal enhanced relay method according to an embodiment of the present invention.
Detailed Description
An object of the present invention is to provide a signal enhancement relay apparatus and method, which can achieve the purpose of performing a link training procedure quickly through a passive mode, and improve the probability of success of the link training procedure by performing an independent adjustment on a display transmitting apparatus SOU and a display receiving apparatus SIN through an active mode when a failure occurs.
Please refer to fig. 1. Fig. 1 shows a block diagram of a signal enhancement (enhancement) relay device 100 according to an embodiment of the present invention.
In an embodiment, the signal enhancing relay apparatus 100 is electrically coupled between the display receiving device SIN and the display transmitting device SOU to link the display receiving device SIN and the display transmitting device SOU, and enhance the image data transmitted by the display transmitting device SOU to the display receiving device SIN through the signal enhancing relay apparatus 100.
In an embodiment, the display receiving apparatus SIN and the display transmitting apparatus SOU perform transmission of image data according to a format of a High Definition Multimedia Interface (HDMI). The signal enhancement relay device 100 may be implemented by, for example, but not limited to, a redrive circuit (driver) or a retimer circuit (timer), depending on the manner of enhancement.
The signal enhancement relay apparatus 100 includes: a data channel extension circuit 110, a data enhancement transmission channel 120, a snoop link bridge processing circuit 130, and an intervening link bridge processing circuit 140 are shown.
The display data channel extension circuit 110 establishes a Display Data Channel (DDC) for display data transmission through, for example, but not limited to, an I2C interface, and exchanges information and status between the display receiving device SIN and the display transmitting device SOU. In one embodiment, the display data channel extension circuit 110 includes a direct channel and an indirect channel.
The direct channel includes a direct path 150 and a path snoop (snoop) circuit 155. The direct path 150 is a communication path for transmitting display data. The path snoop circuit 155 is electrically coupled to the direct path 150 and listens for display data transmissions on the direct path 150.
Snoop link bridge processing circuit 130 is electrically coupled to path snoop circuit 155. In one embodiment, when the signal enhancement relay device 100 operates in the passive mode, the snoop link bridge processing circuit 130 is enabled to perform the above snooping by the path snoop circuit 155 to perform the channel linking procedure corresponding to the data enhancement transmission channel 120.
The indirect path includes a master end path 160A and a slave end path 160B that are independent of each other. The master path 160A is provided with a master transmission circuit 165A, and the slave path 160B is provided with a slave transmission circuit 165B.
The intervening link bridge processing circuit 140 is electrically coupled between the master transmission circuit 165A and the slave transmission circuit 165B. In one embodiment, when the signal enhancement relay device 100 operates in the active mode, the intervening link bridge processing circuit 140 is enabled to access the display data transmission on the master path 160A and the slave path 160B, respectively, for performing the channel linking procedure corresponding to the data enhancement transmission channel 120.
Data enhancement transmission path 120 includes a receiving circuit RX, a transmitting circuit TX, and a data enhancement circuit ENH.
The receiving circuit RX is electrically coupled to the display transmitting apparatus SOU. The transmitting circuit TX is electrically coupled to the display receiving device SIN. The data enhancement circuit ENH enhances the data transmitted by the TX between the receiving circuit RX and the transmitting circuit when the channel linking procedure is completed. More specifically, after the channel linking procedure is completed, the data enhancement transmission channel 120 establishes, for example, but not limited to, a Fixed Rate Link (FRL), receives the image data from the display transmitting apparatus SOU by the receiving circuit RX, transmits the image data to the data enhancement circuit ENH for enhancement, and transmits the image data to the display receiving apparatus SIN by the transmitting circuit TX.
In order to switch the display data channel extension circuit 110, the snoop link bridge processing circuit 130, and the intervening link bridge processing circuit 140 between the passive mode and the active mode, the signal enhancement relay device 100 may optionally further include a first selection circuit 170A, a second selection circuit 170B, and a mode switching circuit 180.
The first selection circuit 170A selects a direct channel to be electrically coupled to the display sink device SIN through the direct path 150 in the passive mode, and selects an indirect channel to be electrically coupled to the display sink device SIN through the main path 160A in the active mode.
The second selection circuit 170B selects a direct channel to electrically couple to the display transmitting device SOU through the direct path 150 in the passive mode, and selects an indirect channel to electrically couple to the display transmitting device SOU through the slave path 160B in the active mode.
The mode switching circuit 180 generates a mode switching signal MS to operate the snoop link bridge processing circuit 130, the intervening link bridge processing circuit 140, the first selection circuit 170A, and the second selection circuit 170B in one of a passive mode or an active mode.
The operation and switching of the passive mode and the active mode will be described in more detail below.
Please refer to fig. 2A. Fig. 2A is a simplified block diagram of the signal enhancement relay device 100 in the passive mode according to an embodiment of the present invention. More specifically, fig. 2A illustrates only circuit blocks in which the signal enhancement relay device 100 operates in the passive mode.
In one embodiment, the mode switching circuit 180 is preset to operate the signal enhancement relay device 100 in the passive mode.
The mode switching circuit 180 generates a mode switching signal MS having a first state, so that the first selection circuit 170A and the second selection circuit 170B select the direct channel to be electrically coupled to the display receiving device SIN and the display transmitting device SOU through the direct path 150. The display data can be transmitted between the display receiver SIN and the display transmitter SOU via the direct path 150.
Further, the mode switch signal MS having the first state enables the snoop link bridge processing circuit 130 to listen for the display data transmission on the direct path 150 through the path snoop circuit 155 for the channel linking procedure. In one embodiment, the channel linking program includes a link training program and an authentication handshake program.
In one embodiment, the snoop link bridging processing circuit 130 includes: link bridge control circuit 200 and authentication snoop circuit 210.
The link bridge control circuit 200 monitors the display data transmission on the direct path 150 through the path monitoring circuit 155 to control the receiving circuit RX and the transmitting circuit TX to perform the link training procedure with the display transmitting apparatus SOU and the display receiving apparatus SIN, respectively.
In an embodiment, the link training program may first transmit Extended Display Identification Data (EDID) information of the display receiving device SIN via the direct path 150 to inform the display transmitting device SOU of the transmission capability supported by the display receiving device SIN. The display transmitting apparatus SOU thus transmits a link request of a transmission mode corresponding to the transmission capability of the display receiving apparatus SIN to the display receiving apparatus SIN through the direct path 150.
The display receiving apparatus SIN further transmits a training pattern (training pattern) to the display transmitting apparatus SOU through the direct path 150. The display transmitting apparatus SOU transmits the test data to the display receiving apparatus SIN through the data enhanced transmission channel 120 according to the training mode, and the display receiving apparatus SIN determines whether the received test data matches the training mode, so as to determine that the link training procedure is successful when the received test data matches the training mode.
On the other hand, the authentication monitoring circuit 210 monitors the authentication status according to the display data transmission, so that the link bridge control circuit 200 determines whether the authentication handshake procedure is completed according to the authentication status.
In one embodiment, the authentication handshake procedure may be performed by key authorization between the display receiving device SIN and the display transmitting device SOU, and exchanging the digital image protection encoding and decoding statuses. In one embodiment, the authentication handshake procedure is a High-bandwidth Digital Content Protection (HDCP) authentication procedure.
When the link training procedure and the authentication handshake procedure are performed, the snoop link bridge processing circuit 130 will continuously snoop the display data transmission performed on the direct path 150, and control the data enhancement transmission channel 120 to perform corresponding actions when the data enhancement transmission channel 120 is required to operate.
It should be noted that the content and the proceeding manner of the link training procedure and the authentication handshake procedure are only an example. In other embodiments, the link training procedure and the authentication handshake procedure may include different content and progression, and the channel link procedure may also include other procedures. The present invention is not limited to the above-described embodiments.
However, the channel linking procedure may fail for different reasons. In one embodiment, when one of the link training procedure and the authentication handshake procedure fails, it is determined that the channel link procedure has failed.
Taking the link training procedure as an example, when the link training procedure is not completed within the preset time, the link training procedure is determined to be failed. When the link training procedure is completed, the transaction (transaction) is determined to be failed in a transaction mode with a rate lower than the supportable mode of the display receiving device SIN (for example, the display receiving device SIN may support the HDMI 2.1FRL mode, but the last transaction is in HDMI2.0TMDS mode).
Taking the authentication handshake procedure as an example, when the authentication handshake procedure is not completed within a preset time or the key authentication fails, it is determined to be a failure.
Please refer to fig. 2B. Fig. 2B is a simplified block diagram of the signal enhancement relay device 100 in the active mode according to an embodiment of the present invention. More specifically, fig. 2B illustrates only circuit blocks in which the signal enhancement relay device 100 operates in the active mode.
In one embodiment, the mode switching circuit 180 operates the signal enhancement relay device 100 in the active mode when the channel linking procedure in the passive mode fails.
The mode switching circuit 180 generates a mode switching signal MS having a second state, so that the first selection circuit 170A and the second selection circuit 170B select the indirect channel to be electrically coupled to the display receiving device SIN and the display transmitting device SOU through the master path 160A and the slave path 160B, respectively.
Further, the mode switch signal MS having the second state enables the intervening link bridge processing circuit 140 to perform the channel linking procedure by the master transmission circuit 165A and the slave transmission circuit 165B accessing the display data transmission on the master path 160A and the slave path 160B, respectively. Similarly, the channel linking procedure includes a link training procedure and an authentication handshake procedure. Further, the signal enhancement relay device 100 operates in the active mode, so that the intervening link bridge processing circuit 140 accesses the display data transmission on the master path and the slave path through the master transmission circuit and the slave transmission circuit, respectively, to perform the channel link procedure corresponding to the data enhancement transmission channel with the endpoint, respectively.
In one embodiment, the intervening link bridge processing circuitry 140 includes: a link coordination circuit 220 and an authentication synchronization circuit 230.
The link coordination circuit 220 accesses the display data transmission on the slave path 160B and the master path 160A through the slave transmission circuit 165B and the master transmission circuit 165A, respectively, to perform a link training procedure.
In one embodiment, the link training procedure includes at least one of: coordinating and displaying the link rates of the transmitting device SOU and the display receiving device SIN respectively; adjusting a feed-forward equalization parameter of the transmit circuit TX; and issues a request for adjusting the display transmission feed-forward equalization parameter of the display transmission circuit to a display transmission circuit (not shown) of the display transmission apparatus SOU.
More specifically, when the link rate of the display transmitting apparatus SOU is too low, the link coordination circuit 220 may actively enable the master transmission circuit 165A to forcibly update the lower link rate, thereby decreasing the link rate of the display receiving apparatus SIN. On the contrary, if the link rate of the display receiving apparatus SIN is too low, the link coordination circuit 220 may actively make the slave transmission circuit 165B send a request for reducing the link rate, so as to reduce the link rate of the display transmitting apparatus SOU.
In an embodiment, when the signal routing transmission quality between the signal enhancement relay device 100 and the display receiving device SIN is poor, the transmission circuit TX may receive a requirement of the display receiving device SIN for adjusting a feed-forward equalizer (FFE) parameter, and at this time, the transmission circuit TX may adjust the feed-forward equalizer parameter to increase the size of the compensation power amplifier, so as to improve the signal quality.
Similarly, the receiver RX may try to request the transmitter SOU to adjust the feed-forward equalization parameters to improve the channel compensation effect to increase the link success rate when the comparison fails in the training mode. Therefore, on the premise of channel loss or the same trace length, the influence of poor traces on signal quality can be reduced as much as possible, and the compatibility of the device is increased.
On the other hand, the authentication synchronization circuit 230 accesses the display data transmission on the slave path 160B and the master path 160A through the slave transmission circuit 165B and the master transmission circuit 165A, respectively, and synchronizes the authentication handshake procedures with the display transmitting apparatus SOU and the display receiving apparatus SIN, respectively.
In an embodiment, when the channel linking procedure is determined to fail due to a failure of one of the link training procedure and the authentication handshake procedure, the display transmitting apparatus SOU and the display receiving apparatus SIN cannot perform Fixed Rate Link (FRL) data transmission through the signal enhancement relay apparatus 100, or the display receiving apparatus SIN cannot decrypt the data of the data enhancement transmission channel.
Therefore, the signal-enhancing relay apparatus 100 of the present invention can perform a fast link training procedure and a listening authentication procedure state in the passive mode, and switch to the active mode when the channel link procedure fails, so as to perform a channel link procedure with a slower rate but adjustable independently for the display transmitting device SOU and the display receiving device SIN. Such a mechanism allows for fast completion of channel linking in the passive mode and increases the probability of channel linking success in the active mode when the channel linking procedure fails.
Please refer to fig. 3. Fig. 3 is a flowchart of a signal enhanced relay method 300 according to an embodiment of the present invention.
In addition to the foregoing devices, the present invention also discloses a signal enhancement relay method 300, which is applied in, for example, but not limited to, the signal enhancement relay apparatus 100 of fig. 1. An embodiment of a signal enhanced relay method 300 is shown, comprising the steps of:
in step S310: in the predetermined passive mode, the direct channel of the display data channel extension circuit 110 is selected to be electrically coupled to the display receiving device SIN and the display transmitting device SOU.
The direct channel includes a direct path 150 electrically coupled to the display receiving device SIN and the display transmitting device SOU directly, and a path monitoring circuit 155 electrically coupled to the direct path 150.
In step S320: in the passive mode, the snoop link bridge processing circuit 130 electrically coupled to the path snoop circuit 155 is enabled to snoop the display data transmission on the direct path 150 through the path snoop circuit 155 for performing the channel linking procedure of the corresponding data enhanced transmission channel 120.
In step S330: it is determined whether the channel link procedure in the passive mode has failed.
When the channel linking procedure in the passive mode has not failed, the flow returns to step S320 to continue operating in the passive mode.
In step S340: when the channel linking procedure in the passive mode fails, the indirect channel of the display data channel extension circuit 110 is selected to be electrically coupled to the display receiving device and the SIN display transmitting device SOU in the active mode.
The indirect path includes a master path 160A provided with a master transmission circuit 165A and electrically coupled to the display receiving device SIN, and a slave path 160B provided with a slave transmission circuit 165B and electrically coupled to the display transmitting device SOU.
In step S350: in the active mode, the intervening link bridge processing circuit 140, which is electrically coupled to the master transmission circuit 165A and the slave transmission circuit 165B, is enabled to access the display data transmission on the master path 160A and the slave path 160B, respectively, via the master transmission circuit 165A and the slave transmission circuit 165B for the channel linking procedure.
In step S360: it is determined whether the channel link procedure in the active mode has failed.
When the channel linking procedure in the active mode has not failed, the process returns to step S350 to continue operating in the active mode.
In one embodiment, when the channel linking procedure in the active mode fails, the process may optionally return to step S310 to operate the signal enhancement relay device 100 in the preset passive mode again. In another embodiment, when the channel linking procedure in the active mode fails, the process may optionally determine whether the link between the display receiving device SIN and the display transmitting device SOU is disconnected in step S370. When the link between the display receiving apparatus SIN and the display transmitting apparatus SOU is not disconnected, it indicates that the signal enhancement relay apparatus 100 continues to maintain the active mode operation, and the flow returns to step S350 to attempt to perform the channel linking procedure. When the link between the display receiver SIN and the display transmitter SOU is disconnected, the signal enhancing relay apparatus 100 stops operating in the active mode, and the process returns to step S310.
It should be noted that the above-mentioned embodiments are only examples. In other embodiments, changes may be made by one of ordinary skill in the art without departing from the spirit of the invention. It should be understood that, except for the case where the order is specifically described, the steps mentioned in the present embodiment may be performed simultaneously or partially simultaneously, and the order before and after the steps can be adjusted according to actual needs.
In summary, the signal enhancement relay apparatus and method of the present invention can achieve the purpose of performing the link training procedure rapidly through the passive mode, and perform the link training procedure of independently adjusting the display transmitting apparatus SOU and the display receiving apparatus SIN through the active mode when the failure occurs, thereby improving the probability of the link training success.
Although the embodiments of the present invention have been described above, these embodiments are not intended to limit the present invention. The technical features of the present invention can be changed by those skilled in the art according to the explicit or implicit contents of the present invention, and these changes are within the scope of the present invention, in other words, the scope of the present invention must be defined by the scope of the claims of the present application.
[ notation ] to show
100 signal enhancement relay device
110 display data channel extension circuit
120 data enhanced transmission channel
130 link bridge monitoring processing circuit
140 intervening link bridging processing circuitry
150 direct path
155 path snoop circuit
160A primary side path
160B slave side path
165A main terminal transmission circuit
165B slave end transmission circuit
170A first selection circuit
170B second selection circuit
180 mode switching circuit
200 link bridge control circuit
210 authentication monitoring circuit
220 link coordination circuit
230 authentication synchronization circuit
300 signal enhancement relay method
S310 to S370
ENH data enhancement circuit
MS mode switching signal
RX receiving circuit
SIN display receiving device
SOU display transmission device
TX transmission circuit
Claims (10)
1. A signal enhancement relay device for linking a display transmitting apparatus and a display receiving apparatus, the signal enhancement relay device comprising:
a display data channel extension circuit, comprising:
a direct channel including a direct path and a path monitor circuit electrically coupled to the direct path; and
an indirect channel including a master end path provided with a master end transmission circuit and a slave end path provided with a slave end transmission circuit;
a data enhancement transmission channel;
a snoop link bridge processing circuit electrically coupled to the path snoop circuit; and
an intervening link bridge processing circuit electrically coupled to the master transmit circuit and the slave transmit circuit;
wherein the direct channel is selected in a predetermined passive mode such that the direct path is electrically coupled to the display receiving device and the display transmitting device directly, and the snoop link bridge processing circuit is enabled to snoop a display data transmission on the direct path through the path snoop circuit to perform a channel linking procedure corresponding to the data enhanced transmission channel;
when the channel link procedure in the passive mode fails, the indirect channel is selected in an active mode such that the master path and the slave path are electrically coupled to the display receiving device and the display transmitting device, respectively, and the intervening link bridge processing circuit is enabled to access the display data transmission on the master path and the slave path through the master transmission circuit and the slave transmission circuit, respectively, for performing the channel link procedure.
2. The signal enhancement relay device of claim 1, further comprising:
a first selection circuit configured to select the direct channel to be electrically coupled to the display sink device through the direct path in the passive mode and to select the indirect channel to be electrically coupled to the display sink device through the main end path in the active mode; and
a second selection circuit configured to select the direct channel to electrically couple to the display transport through the direct path in the passive mode and to select the indirect channel to electrically couple to the display transport through the slave path in the active mode.
3. The signal-enhanced relay device of claim 2, further comprising a mode switching circuit configured to generate a mode switching signal to cause the snoop link bridge processing circuit, the intervening link bridge processing circuit, the first selection circuit, and the second selection circuit to operate in one of the passive mode or the active mode.
4. The signal enhancement relay device of claim 1, wherein the channel linking procedure comprises a link training procedure and an authentication handshake procedure, and the channel linking procedure is determined to fail when one of the link training procedure and the authentication handshake procedure fails.
5. The signal-enhancing relay device of claim 4, wherein the link training procedure is determined to have failed when the link training procedure is not completed within a predetermined time or when the link training procedure is completed in a transaction mode having a lower transaction rate than a supportable mode of the display-receiving apparatus.
6. The apparatus of claim 4, wherein the authentication handshake procedure is determined to fail when the authentication handshake procedure is not completed within a predetermined time or a key authentication fails.
7. The signal enhancement relay device of claim 1, wherein the data enhancement transmission channel comprises:
a receiving circuit electrically coupled to the display transmitting device;
a transmission circuit electrically coupled to the display receiving device; and
a data enhancement circuit configured to enhance data transferred between the receive circuit and the transmit circuit upon completion of the channel chaining procedure.
8. The signal-enhanced relay device of claim 7, wherein the snoop link bridging processing circuit comprises:
a link bridge control circuit configured to monitor the display data transmission on the direct path through the path monitoring circuit to control the receiving circuit and the transmitting circuit to perform a link training procedure with the display transmitting device and the display receiving device; and
and the authentication monitoring circuit is configured to monitor an authentication state according to the display data transmission so that the link bridge control circuit judges whether an authentication handshake procedure is completed according to the authentication state.
9. The signal enhancement relay device of claim 7 wherein the intervening link bridge processing circuitry comprises:
a link coordination circuit configured to access the display data transmission on the slave path and the master path through the slave transmission circuit and the master transmission circuit, respectively, to control the receiving circuit and the transmitting circuit to perform a link training procedure with the display transmitting apparatus and the display receiving apparatus, wherein the link training procedure at least includes one of the following procedures: coordinating a link speed rate for respective transactions with the display transmitting device and with the display receiving device; adjusting a feed-forward equalization parameter of the transmit circuit; and sending a request for adjusting a display transfer feed forward equalization parameter of the display transfer circuit to a display transfer circuit of the display transfer apparatus; and
an authentication synchronization circuit configured to access the display data transmission on the slave path and the master path through the slave transmission circuit and the master transmission circuit, respectively, and to perform an authentication handshake procedure with the display transmitting apparatus and with the display receiving apparatus, respectively, in synchronization.
10. A signal enhancement relay method is applied to a signal enhancement relay device, and the signal enhancement relay device is used for linking a display transmitting device and a display receiving device, and the signal enhancement relay method comprises the following steps:
in a predetermined passive mode, selecting a direct channel of a display data channel extension circuit to electrically couple to the display receiving device and the display transmitting device, wherein the direct channel includes a direct path electrically coupling the display receiving device and the display transmitting device directly and a path monitoring circuit electrically coupled to the direct path;
in the passive mode, enabling a monitoring link bridging processing circuit electrically coupled to the path monitoring circuit to monitor a display data transmission on the direct path through the path monitoring circuit to perform a channel linking procedure corresponding to a data enhanced transmission channel;
determining whether the channel link procedure in the passive mode has failed;
selecting an indirect channel of the display data channel extension circuit to electrically couple to the display receiving device and the display transmitting device in an active mode when the channel linking procedure in the passive mode fails, wherein the indirect channel includes a master path provided with a master transmission circuit and electrically coupled to the display receiving device and a slave path provided with a slave transmission circuit and electrically coupled to the display transmitting device; and
in the active mode, an intervening link bridge processing circuit electrically coupled to the master transmission circuit and the slave transmission circuit is enabled to access the display data transmission on the master path and the slave path through the master transmission circuit and the slave transmission circuit, respectively, for performing the channel linking procedure.
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| CN202010619798.3A CN113872660B (en) | 2020-06-30 | 2020-06-30 | Signal enhancement relay device and method |
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| CN202010619798.3A CN113872660B (en) | 2020-06-30 | 2020-06-30 | Signal enhancement relay device and method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070074269A1 (en) * | 2002-02-22 | 2007-03-29 | Hai Hua | Video processing device, video recorder/playback module, and methods for use therewith |
| CN101489075A (en) * | 2008-01-15 | 2009-07-22 | 宏正自动科技股份有限公司 | Display signal extending apparatus and method for transmitting display signal therefor |
| CN109144922A (en) * | 2017-06-16 | 2019-01-04 | 纬颖科技服务股份有限公司 | Data transmission device and method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070074269A1 (en) * | 2002-02-22 | 2007-03-29 | Hai Hua | Video processing device, video recorder/playback module, and methods for use therewith |
| CN101489075A (en) * | 2008-01-15 | 2009-07-22 | 宏正自动科技股份有限公司 | Display signal extending apparatus and method for transmitting display signal therefor |
| CN109144922A (en) * | 2017-06-16 | 2019-01-04 | 纬颖科技服务股份有限公司 | Data transmission device and method thereof |
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