CN117640863B - Multi-channel fusion video signal transmission system and vehicle comprising same - Google Patents
Multi-channel fusion video signal transmission system and vehicle comprising same Download PDFInfo
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- CN117640863B CN117640863B CN202410101187.8A CN202410101187A CN117640863B CN 117640863 B CN117640863 B CN 117640863B CN 202410101187 A CN202410101187 A CN 202410101187A CN 117640863 B CN117640863 B CN 117640863B
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- 230000004927 fusion Effects 0.000 title claims abstract description 9
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- 238000005516 engineering process Methods 0.000 description 5
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/0806—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division the signals being two or more video signals
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention relates to a multichannel fusion video signal transmission system and a vehicle comprising the same. The transmission system includes a Serdes chip that includes a serializer and deserializer that receives three video signals and outputs a four-way link that distributes the video signals to eight screens for display using a two-stage daisy-chained deserializer. The invention adopts a Serdes chip to output four link interfaces, utilizes a two-stage daisy chain to distribute video signals to eight different screens for display, reduces the cost, simplifies the design and improves the maintainability, and is suitable for occasions needing to distribute the signals to a plurality of screens for display.
Description
Technical Field
The invention relates to the technical field of automobile electronics; in particular, the invention relates to a multiplex fusion video signal transmission system and a vehicle comprising the same.
Background
China is the biggest global automobile market, has strong competition and higher acceptance of new technology by consumers, and has rapid development and application speed of vehicle-mounted display technology.
The vehicle-mounted display technology is early applied to central control and instruments, has small size and low resolution, is mostly a broken code screen and a dot matrix screen, and has obvious trend of large size, high image quality, multi-screen and multi-point touch along with the increase of vehicle-mounted video and audio and navigation requirements and the development of thin film transistor liquid crystal display (TFT-LCD) technology.
In the existing display system, the display of 8 screens is realized by adopting a four-level daisy chain of two LINK interfaces of two serial deserializing (Serdes) chips to realize the output of signals, but the scheme has some defects such as difficult maintenance, high complexity, high cost and the like.
Disclosure of Invention
It is therefore an object of the present invention to provide a multiple converged video signal transmission system and a vehicle including the same, which solve or at least alleviate one or more of the above-mentioned problems and other problems of the prior art.
To achieve the foregoing object, a first aspect of the present invention provides a multiple converged video signal transmission system, wherein the transmission system includes a Serdes chip including a serializer and a deserializer, the serializer receiving three video signals and outputting four links that distribute the video signals to eight screens for display using a two-stage daisy-chained deserializer.
In the foregoing transmission system, optionally, the Serdes chip includes one serializer, and the deserializer includes four primary deserializers and four secondary deserializers, where the four primary deserializers are respectively connected to the four links, the four secondary deserializers are respectively connected to the four primary deserializers, and the eight screens are respectively connected to the four primary deserializers and the four secondary deserializers.
In the foregoing transmission system, optionally, the transmission system further includes a system on chip providing the three paths of video signals, and the serializer includes three input interfaces and four serial transmission ends, the three input interfaces are two DSI interfaces and one DP interface, each input interface receives one path of the video signals, each primary deserializer includes a receiving end, a deserializer video processing module, an output interface and a deserializing transmission end, the receiving end receives the signals output by the serial transmission end and inputs the signals to the deserializer video processing module for processing, and then outputs the signals to the output interface and the deserializing transmission end, the output interface is connected with one screen, the deserializing transmission end is connected with one secondary deserializer, and the secondary deserializer has the same structure as the primary deserializer, and the output interface of the secondary deserializer is connected with one screen.
In the foregoing transmission system, optionally, the serializer further includes a serializer video processing module and a video stream buffer, which are disposed between the input interface and the serial transmitting terminal, and the video stream buffer is configured to process multiple paths of videos split by the serializer video processing module at the same time and control the multiple paths of videos to be distributed and output to four serial transmitting terminals.
In the transmission system as described above, optionally, the deserializer video processing module supports a super frame mode.
In the foregoing transmission system, optionally, the output interface is an OLDI interface or a DP interface for adapting to transmission display of multiple video formats.
In the foregoing transmission system, optionally, each DSI interface may transmit at most four video signals at the same time, the DP interface may transmit at most four video signals at the same time, and the serializer may control the DSI interface and the DP interface to output four video signals by arbitrary routing.
In the transmission system as described above, optionally, the eight screens include: the vehicle control screen, back row control screen, instrument screen, new line display screen, well accuse screen, vice driving screen, first backseat screen and second backseat screen.
In order to achieve the aforementioned object, a second aspect of the invention provides a vehicle, wherein the vehicle comprises a transmission system according to any one of the aforementioned first aspects.
The invention provides a multipath fusion video signal transmission system and a vehicle comprising the same, which adopt a Serdes chip to output four link interfaces, and utilize a two-stage daisy chain to distribute video signals to eight different screens for display, thereby reducing the cost, simplifying the design and improving the maintainability, and being suitable for occasions needing to distribute the signals to a plurality of screens for display.
Drawings
The present disclosure will become more apparent with reference to the accompanying drawings. It is to be understood that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the invention. In the figure:
FIG. 1 is a schematic diagram of one embodiment of a multiple converged video signal transmission system of the present invention;
FIG. 2 is a schematic diagram of a Serdes chip in an embodiment of a multiple converged video signal transmission system of the present invention;
fig. 3 is a schematic diagram of a serializer in an embodiment of the multiple converged video signal transmission system of the present invention.
Reference numerals: 1-serializer; 2-serializer video processing module; 3-primary deserializers; a 4-second-stage deserializer; 5-a system on chip; 6-an input interface; 7-a serial transmitting end; 8-a receiving end; 9-deserializer video processing module; 10-an output interface; 11-deserializing a transmitting end; 12-screen; 13-video stream buffer.
Detailed Description
The structure, composition, characteristics, advantages and the like of the multiplex fusion video signal transmission system according to the present invention and the vehicle including the same will be described below by way of example with reference to the accompanying drawings and the specific embodiments, however, all descriptions should not be construed as limiting the present invention in any way.
Furthermore, to the extent that any individual feature described or implied in the embodiments set forth herein, or any individual feature shown or implied in the figures, the invention still allows any combination or deletion of such features (or equivalents thereof) without any technical hurdle, and further embodiments according to the invention are considered to be within the scope of the disclosure herein.
It should be further noted that terms such as "disposed" should be construed broadly, and for example, may be fixedly connected, detachably connected, or integrated; can be directly connected or indirectly connected through an intermediate medium. Unless otherwise specifically defined, it will be apparent to those skilled in the art that the specific meaning of the terms described above in the present invention can be understood according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, may refer to different or the same object. For descriptive purposes only and not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. The meaning of "a plurality of" and the like is at least two and more, unless explicitly defined otherwise.
Fig. 1 is a schematic diagram of an embodiment of a multi-channel video signal transmission system according to the present invention.
As shown in fig. 1, the multi-channel fusion video signal transmission system may include a system on a chip (SOC) 5, a serializer 1, a deserializer, and a screen 12. The deserializers may include four primary deserializers 3 and four secondary deserializers 4. In this embodiment, the number of deserializers and screens 12 is eight, and in other alternative embodiments, the specific number of deserializers and screens 12 may be set according to the actual working needs. The three input interfaces 6 of the serializer 1 receive three video signals provided from the system on chip 5 and output four-way links to the primary 3, secondary 4 deserializers of the two-stage daisy chain architecture by four serial transmitting terminals 7 (see fig. 2), the primary 3, secondary 4 deserializers distributing the video signals to eight screens 12. The eight screens 12 may include, for example, a vehicle control screen, a rear control screen, an instrument screen, a heads-up display screen, a center control screen, a secondary drive screen, a first rear seat screen, and a second rear seat screen.
The present disclosure can efficiently route and manage multiple video sources by combining the two interfaces DSI and DP in the serializer 1. In a word, the present disclosure proposes a multi-path video information routing scheme based on DSI and DP, which can meet the requirements for video resources under different usage scenarios, and bring more convenient usage experience to users.
In this embodiment, the input interfaces 6 may comprise two DSI interfaces and at least one DP interface, each input interface 6 receiving a respective one of the video signals, the whole serializer 1 being arranged to receive the three video signals provided by the system on chip 5. The serializer 1 is responsible for converting received parallel video signals into serial video signals, which can be routed to any four-way link interface, which is connected from the serial transmitting end 7 of the serializer 1 to the receiving end 8 of the four-way primary deserializer 3, respectively, so that the application is wider. At the same time, the architecture of the serializer 1 with the two-stage daisy chain is also guaranteed by the number of four-way linked interfaces, which can be connected with a plurality of display screens 12 or other devices. The two-stage daisy chain architecture can be embodied in that the deserializer comprises four first-stage deserializers 3 and four second-stage deserializers 4, wherein a receiving end 8 receives signals output by a serial transmitting end 7 and inputs the signals into a deserializer video processing module 9, after the signals are processed, one path of video is divided into two paths of videos, the two paths of videos are respectively output to an output interface 10 and a deserializing transmitting end 11, the output interfaces 10 are respectively connected with one screen 12, the deserializing transmitting end 11 is connected with the next second-stage deserializers 4, so that eight screens 12 can respectively display a first-class video, a user can realize resource sharing, and meanwhile, the high quality and fluency of video playing are ensured.
The daisy chain architecture represents a wiring scheme, e.g. a and B connections, B and C connections, in which no mesh topology is formed, and only the adjacent devices, components, e.g. a in the above example are not able to communicate directly with C, which must be relayed through B, which does not form a loop, and which can be wired using low cost wiring harnesses. Specifically, in this embodiment, a daisy chain architecture is adopted between the primary deserializer 3 and the secondary deserializer 4, and the serializer 1 and the primary deserializer 3 may also be connected by using a daisy chain architecture, where a limited signal transmission line may be used to connect multiple devices, so as to share the same service, and there is no problem of bus contention and blocking.
In this embodiment, the receiving terminals 8 of the primary and secondary deserializers 3, 4 have an R-Linc signal receiving function, and the deserializing transmitting terminals 11 of the primary and secondary deserializers 3, 4 and the serial transmitting terminal 7 of the serializer 1 all have an R-Linc signal output function. The communication between the serializer 1 and the primary deserializer 3, and between the primary deserializer 3 and the secondary deserializer 4 is transmitted through the R-Linc protocol, which is a proprietary communication protocol for automobiles developed by the inventor company. The protocol is the agreement of the data frame format of the communication between the equipment and the control end, and different functions correspond to different data frames. The data frame comprises a frame head, data and a frame tail. Wherein the frame header and the frame tail contain some necessary control information, such as synchronization information, address information, error control information, etc.; the data portion includes data, such as IP packets, that are transmitted by the network layer. The private communication protocol is a set of enterprise self-defined protocol standard, is customized for enabling the equipment and the control end to carry out safe communication, and avoids malicious attack, control and the like of the equipment by unknown signals.
FIG. 2 is a schematic diagram of a Serdes chip in an embodiment of a multiple converged video signal transmission system of the present invention.
In this embodiment, the serializer 1, the primary deserializer 3 and the secondary deserializer 4 are integrated into a sort of Serdes chip. Serdes is an abbreviation for Serializer (Serializer) and Deserializer (Deserializer). The Serdes chip is widely used in signal transmission of communication systems. The Serdes chip is a transceiver integrated circuit that performs serial data and parallel data interconversions. Serdes facilitates the transfer of parallel data between two points of a serial data stream, reducing the number of data paths and the connection PIN or line required. Most Serdes devices can operate in full duplex, meaning that data conversion can be performed in both directions simultaneously. In this embodiment, serdes chips are typically used in gigabit Ethernet systems, wireless network routers, fiber optic communication systems, and storage systems. The specifications and speeds vary with the needs of the user and the application. The system design would employ the high-speed serial interface of serializer 1 and deserializer instead of the conventional parallel bus architecture. Serdes-based designs increase bandwidth, reduce signal count, and provide many benefits such as reduced wiring conflicts, reduced switching noise, lower power consumption, and packaging costs.
In the embodiment shown in fig. 2, the serializer 1 may include an input interface 6, a serializer video processing module 2, a video stream buffer 13, and a serial transmitting terminal 7. The primary deserializer 3 and the secondary deserializer 4 may include a receiving end 8, a deserializer video processing module 9, an output interface 10, and a deserializing transmitting end 11. The system on chip 5 provides three paths of video signals and transmits the three paths of video signals to the serializer video processing module 2 through three input interfaces 6 of the serializer 1 for video splitting, the serializer video processing module 2 divides the three paths of video signals into eight streams of video and registers the eight streams of video into video stream buffers 13 connected with the eight streams of video, and the video stream buffers 13 are respectively connected with four serial transmitting ends 7 and output four paths of video to receiving ends 8 of four primary deserializers 3 through the four serial transmitting ends 7. It should be noted that only one-way two-level daisy chain architecture deserializer is shown in the figure, and in fact, in this embodiment, there is four-way two-level daisy chain architecture deserializer, as shown in fig. 1. In this embodiment, the deserializer video processing module 9 supports super frame mode. Specifically, the video signal received by the receiving end 8 of each primary deserializer 3 includes two video signals, the super frame mode can splice the pictures of the two video signals into one picture, then the two pictures are split by the deserializer video processing module 9, one video signal is directly output to one screen 12 for display through the output interface 10, the other video signal continues to be transmitted to the next secondary deserializer 4 through the deserializer transmitting end 11, and the secondary deserializer 4 processes the video stream to the corresponding screen 12 for display through the same process.
The communication between the serializer 1 and the primary deserializer 3, and between the primary deserializer 3 and the secondary deserializer 4 is transmitted via the R-Linc protocol, which has been described in detail in the above embodiment.
In alternative embodiments, the output interface 10 may be an OLDI interface or a DP interface, so that transmission and display suitable for a variety of video formats may be selected. The OLDI interface is a standardized interface for data exchange and integration, and different system devices can share data and realize real-time data transmission and updating, so that cooperation and interoperability among the system devices are realized. The DP interface is mainly used for connecting a video source with a display screen and other devices, also supports carrying audio, USB and other forms of data, has the advantages of high bandwidth and low cost, and the DP interface is needed in the multi-screen splicing technology.
In alternative embodiments, the number of deserializers and screens 12 may be set according to actual needs.
In the illustrated embodiment, the multiple converged video signal transmission system may include the following features: the serializer 1 is internally provided with a serializer video processing module 2 which is used for receiving external display signals (two paths of DSI and one path of DP) and inputting the external display signals into the system; the deserializer video processing module 9 supports a super frame mode and divides one path of video into two paths of video; eight video stream buffers 13 are built in the serializer 1, so that eight paths of videos can be processed simultaneously, and the eight paths of videos can be controlled to be distributed to four paths of R-Lincs at will; each R-linc supports two paths of video stream transmission, and can output two paths of video streams to two deserializers for display in a daisy chain mode; the deserializer is provided with one path of R-linc receiving and one path of R-linc output function, and can control the video stream to be continuously transmitted to the next deserializer; the serializer 1 may use the DSI or DP interface independently, or may use both the DSI and DP interfaces.
Fig. 3 is a schematic diagram of a serializer in an embodiment of the multiple converged video signal transmission system of the present invention.
As shown in fig. 3, the serializer 1 may include at least three input interfaces 6 and four serial transmission terminals 7, wherein the input interfaces 6 may include at least two DSI interfaces and at least one DP interface. In a three-input four-output embodiment, the following splitting scheme is possible: two DSI interfaces provide two paths of video signal transmission, and one DP interface provides the remaining two paths of video signal transmission; two DSI interfaces respectively provide four paths of signal transmission of two paths of video signals; the two DP interfaces respectively provide four paths of signal transmission of two paths of video signals.
In an alternative embodiment, each DSI interface can simultaneously transmit at most four video signals, and the DP interface can simultaneously transmit at most four video signals, so long as three input video signals are output as four video signals, and path selection and allocation thereof can be freely selected and routed. The routing is a routing, which is an important component of network communication, and determines on which output line the incoming data should be transmitted, and the routing refers to selecting an optimal path in the network, so that the data packet can reach the target rapidly and accurately. The method provides a reliable transmission path for the data packet and has important roles in network security, performance optimization, service discovery and the like.
The DSI interface is a display output interface 10 defined by the mobile industry processor interface alliance (MIPI), which defines a high-speed serial interface between the processor and the display module, and is a serial transmission scheme that includes data, instructions, and other information.
The DP interface is a digital high-definition image display interface supporting one signal line for simultaneously transmitting video and audio signals, and can support not only full high-definition display resolution (1920×1080) but also 4k resolution (3840×2160) and the latest 8k resolution (7680×4320). The DP interface has high transmission rate and reliability and stability, and the signal transmitted by the interface consists of the data channel signal for transmitting the image and the auxiliary channel signal for transmitting the state and control information related to the image. Meanwhile, it should be noted here that the specification of the DP interface includes support for two transmission methods: single Stream Transmission (SST) and Multi Stream Transmission (MST). Specifically, in this embodiment, when the DP interface is used to transmit two-way video including four streams, multi-stream transmission is used.
Another aspect of the invention also provides a vehicle incorporating the multiplex fusion video signal transmission system of any of the preceding embodiments. For example, the vehicle may include a vehicle control screen, a rear control screen, an instrument screen, a head-up display screen, a central control screen, a secondary driving screen, a first rear seat screen, a second rear seat screen, and the like, and the multi-channel integrated video signal transmission system adopts a Serdes chip to output four-channel secondary daisy chains to distribute signals to the eight screens 12 for display, so that the cost can be reduced, the design can be simplified, and the maintainability can be improved. The present approach is applicable where it is desired to distribute signals to multiple screens 12 for display.
The technical scope of the present invention is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and these changes and modifications should be included in the scope of the present invention.
Claims (9)
1. A multi-channel fusion video signal transmission system is characterized in that the transmission system comprises a Serdes chip, the Serdes chip comprises a serializer (1) and a deserializer, the serializer (1) receives three-channel video signals and outputs four-channel links, the four-channel links distribute the video signals to eight screens (12) for display by using the deserializer of a two-stage daisy chain,
the serializer (1) comprises three input interfaces (6) and four serial sending ends (7), each input interface receives one path of video signals respectively, the three input interfaces (6) comprise a DSI interface and a DP interface, and the serializer (1) controls the DSI interface and the DP interface to output four paths of video signals in any route.
2. The transmission system according to claim 1, characterized in that the Serdes chip comprises one said serializer (1), the deserializer comprises four primary deserializers (3) and four secondary deserializers (4), the four primary deserializers (3) are respectively connected to the four links, the four secondary deserializers (4) are respectively connected to the four primary deserializers (3), and eight of the screens (12) are respectively connected to the four primary deserializers (3) and the four secondary deserializers (4).
3. Transmission system according to claim 2, characterized in that the transmission system further comprises a system on chip (5) providing the three paths of video signals, and in that the three input interfaces (6) are respectively two DSI interfaces and one DP interface, each of the primary deserializers (3) comprises a receiving end (8), a deserializer video processing module (9), an output interface (10) and a deserializing transmitting end (11), the receiving end (8) receives the signal output by the serial transmitting end (7) and inputs it into the deserializer video processing module (9) for processing and outputs the signal to the output interface (10) and the deserializing transmitting end (11), respectively, the output interface (10) is connected to one of the screens (12), the deserializing transmitting end (11) is connected to one of the secondary deserializers (4), the secondary deserializers (4) have the same structure as the primary deserializers (3), and the output interface (10) of the secondary deserializers (4) is connected to one of the screens (12).
4. A transmission system according to claim 3, wherein the serializer (1) further comprises a serializer video processing module (2) and a video stream buffer (13) arranged between the input interface (6) and the serial transmitting terminal (7), the video stream buffer (13) being adapted to simultaneously process multiple paths of video split by the serializer video processing module (2) and to control the multiple paths of video split output to four of the serial transmitting terminals (7).
5. A transmission system according to claim 3, characterized in that the deserializer video processing module (9) supports super frame mode.
6. A transmission system as claimed in claim 3, characterized in that the output interface (10) is an OLDI interface or a DP interface for adapting to a transmission display of a plurality of video formats.
7. A transmission system as claimed in claim 3, wherein each DSI interface is capable of transmitting up to four video signals simultaneously, and the DP interface is capable of transmitting up to four video signals simultaneously.
8. The transmission system according to claim 1, wherein eight of said screens (12) comprise: the vehicle control screen, back row control screen, instrument screen, new line display screen, well accuse screen, vice driving screen, first backseat screen and second backseat screen.
9. A vehicle, characterized in that it comprises a transmission system according to any one of the preceding claims 1 to 8.
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