CN113965711A - 4K video display control device and method based on domestic Haisi platform - Google Patents
4K video display control device and method based on domestic Haisi platform Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0125—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level one of the standards being a high definition standard
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
Abstract
The invention relates to a 4K video display control device and a method based on a localization Haisi platform, the device comprises a Haisi image processing chip, an HDMI video signal interface conversion chip, a display control computer exchange board and a 4K display screen, the HDMI interface conversion chip receives an HDMI video signal and converts the HDMI video signal into an MIPI video signal, the Haisi image processing chip is internally provided with 4K video coding and decoding and display control software, the MIPI video signal is received and converted into the 4K HDMI video signal, the 4K display screen receives and displays 4K HDMI video data of the Haisi image processing chip through the HDMI interface, and the display control computer exchange board is connected with the Haisi image processing chip through a gigabit Ethernet to realize display control and video transmission functions. The design is reasonable, the coding, decoding and display control functions of the 4K HDMI ultra-high definition video suitable for the domestic hardware platform are realized, stronger support is provided for the display control computer, and the method conforms to the major trend of future technical development.
Description
Technical Field
The invention belongs to the technical field of video display control, and particularly relates to a device and a method for controlling 4K video display based on a domestic Haisis platform.
Background
At present, the types and the number of sensors equipped in modern ships are continuously increased along with the displacement and the functional performance, and particularly, the data volume of real-time video transmission is greatly increased by the application of a phased radar array and an ultra-high-definition video sensor. Due to the requirement of rapid response of ships, the requirement of the display terminal on the comprehensive display effect of the video information is higher and higher, and the resolution ratio of the display terminal is also advanced from standard definition (720P), normal definition (1K) and high definition (2K) to ultra-high definition (4K).
In the 2K display era, the single-channel highest bandwidth of the DVI display interface is 1.65 Gbps; when 4K display is achieved, a DVI interface cannot meet the requirement due to bandwidth limitation and is replaced by HDMI, the single-channel bandwidth of the DVI interface is 6Gbps, and the highest support is for 8K display transmission. At present, the requirements of the shipborne equipment on the display effect, video processing and data operation of the display and control computer are increasing, and many projects require 4K high-definition display and support 3840X2160 resolution. Therefore, how to realize the coding, decoding and display control functions of the 4K HDMI ultra high definition video based on the localization hardware platform is a problem which needs to be solved urgently at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a device and a method for controlling the display of a 4K video based on a localization Haisi platform, and realizes the functions of encoding and decoding and display control of the 4K HDMI ultra-high definition video suitable for a localization hardware platform.
The invention solves the technical problems in the prior art by adopting the following technical scheme:
the 4K video display control device comprises a Haisi image processing chip, an HDMI video signal interface conversion chip, a display control computer exchange board and a 4K display screen, wherein the HDMI interface conversion chip receives an HDMI video signal and converts the HDMI video signal into an MIPI video signal, 4K video coding and decoding and display control software is arranged in the Haisi image processing chip, the MIPI video signal is received and converted into the 4K HDMI video signal, the 4K display screen receives and displays 4K HDMI video data of the Haisi image processing chip through an HDMI interface, and the display control computer exchange board is connected with the Haisi image processing chip through a gigabit Ethernet to realize display control and video transmission functions.
And the HDMI video signal interface conversion chip is connected with the Haisi image processing chip through the IIC interface.
Moreover, the Haisi image processing chip adopts a Hi3559AV100 chip, and the HDMI video signal interface conversion chip adopts an LT6911 chip.
A 4K video display control method based on a localization haisi platform, applied to the 4K video display control device based on the localization haisi platform of claim 1, 2 or 3, comprising the following steps:
step 1, a Haesi image processing chip reads a configuration file, initializes variables and initializes LT6911UXC interrupt response functions;
step 2, carrying out video input and output, encoding and decoding and video processing module configuration;
step 3, starting a mouse control thread, a multi-window video control thread and an encoding and decoding test thread;
and step 4, the Haisi image processing chip communicates with the HDMI video signal interface conversion chip, when video is input at the input end, an LT6911UXC interrupt response function is triggered, a register of the response function is read to obtain the resolution of the input video, a user picture is inserted, the obtained HDMI to MIPI input parameters are processed by calling an H264CodecVpssVo function, the decoded stream is processed by a VPSS to generate a 4K HDMI video signal after being decoded by a VDEC, and finally the 4K HDMI video signal is output to a 4K HDMI display screen through VO configuration.
The mouse control thread is used for realizing the function of controlling the display of the video window by the mouse, and comprises the steps of superposing a mouse pointer bmp picture at the appointed position of the video display interface, adjusting the priority of a video layer after the mouse clicks, temporarily storing the display position of the video layer, recovering the display position of the video layer and setting the display area of the video layer in the operation of maximizing the window by double clicking the mouse; and adjusting the priority of the video layer and setting the display area of the video layer after the mouse is dragged.
Moreover, the multi-window video control thread: receiving and analyzing instructions of a display control computer exchange board, realizing the functions of controlling the sizes and positions of different video display windows, and comprising the steps of starting an RTSP service thread, starting an encoding channel to receive an input image, closing the encoding channel, ending an RTSP service process, starting an RTSP client thread, enabling a decoding channel, receiving a code stream sent by a user, setting a display channel, closing the decoding channel and ending the RTSP client thread; starting/ending a video file playing thread; and setting a display area, priority and code rate of a video layer.
And the coding and decoding test thread is used for simultaneously starting two paths of video coding and decoding and displaying functions.
Furthermore, the processing flow of the LT6911UXC interrupt response function is as follows:
enabling external IIC communication;
reading the register to obtain the resolution of the input video;
turning off external IIC communication;
enabling the inserted user picture HI _ MPI _ VI _ EnableUserPic;
calling a video encoding and decoding processing H264CodecVpssVo function;
sixthly, inserting a user picture HI _ MPI _ VI _ DisableUserPic is forbidden.
Moreover, the processing method of the video coding and decoding processing H264CodecVpssVo function is as follows: initializing a VI; initializing a HIMPP SYS and a universal VB buffer; setting the public buffer pool attribute of the general buffer area; configuring VI parameters and starting VI; configuring and starting a decoder VDEC; configuring VPSS parameters and starting VPSS; configuring VO parameters and starting VO; configuring and starting a coder VENC; binding VI with a coder VENC and binding VI with a VPSS; binding a decoder VDEC to a VPSS and binding the VPSS to a VO; and pushing video stream data.
The invention has the advantages and positive effects that:
1. the invention processes the MIPI video signal transmitted by the interface conversion chip LT6911 through the Haisi image processing chip, processes the H.264 video signal transmitted by the exchange board of the display and control computer, displays the 4K HDMI video obtained after the processing through the 4K display screen, realizes the coding and decoding and display control functions of the 4K HDMI ultra-high definition video suitable for the domestic hardware platform, provides stronger support for the display and control computer, and accords with the great trend of the future technical development.
2. The invention can transmit the 4K HDMI video to the display control computer exchange board through the Ethernet by video coding and decoding, and the 4K HDMI video is stored or displayed, thereby realizing the Ethernet 4K HDMI video transmission function.
3. The invention can superpose the MIPI video signal transmitted by the interface conversion chip LT6911 and the video signal transmitted by the Ethernet, realizes the multi-channel video superposition function, can display the decoded video image in the application program window, supports the function of adjusting the size and the position, and meets the requirements of different users.
Drawings
FIG. 1 is a block diagram of a 4K video display control platform according to the present invention;
FIG. 2 is a flow chart of a 4K video display control method according to the present invention;
FIG. 3 is a flow chart of the LT6911UXC interrupt response function of the present invention;
FIG. 4 is a flow chart of the H264CodecVpssVo function of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A4K video display control device based on a domestic Haisi platform is disclosed as shown in figure 1, which comprises a Haisi image processing chip Hi3559AV100, an HDMI video signal interface conversion chip LT6911, a display control computer exchange board and a 4K display screen, wherein the HDMI interface conversion chip LT6911 receives HDMI video signals and converts the HDMI video signals into MIPI video signals, the Haisi image processing chip Hi3559AV100 is connected with the HDMI interface conversion chip LT6911 through an IIC bus and converts the MIPI video signals into HDMI signals, the Haisi image processing chip Hi3559AV100 is connected with the display control computer exchange board through a gigabit Ethernet, on one hand, the HDMI video signals transmitted by the conversion chip LT6911 are encoded to generate H.264 format 4K video signals and transmitted to the display control computer exchange board for storage or display, on the other hand, the H.264 format 4K video transmitted by the display control computer exchange board is decoded to generate HDMI video signals, or the two paths of signals are subjected to superposition processing, the Haisi image processing chip Hi3559AV100 is connected with the 4K display screen through the HDMI interface, and the video signals generated by the Haisi image processing chip Hi3559AV100 are displayed and output through the 4K display screen. 4K video coding and decoding and display control software is arranged in the Haisi image processing chip Hi3559AV100, and the functions of coding and decoding video signals and display control are realized.
The HDMI video signal interface conversion chip LT6911 can convert an input 4K HDMI video signal into an MIPI video signal, and inputs the MIPI video signal into a Hi3559AV100 chip.
The Haesi image processing chip Hi3559AV100 is used as the core of a control implementation control platform, runs under an embedded Linux operating system, and realizes the functions of transmission protocol control, 4K HDMI video input and output, Ethernet transmission and multi-channel video superposition through 4K video coding, decoding and display control software. The 4K video coding and decoding and display control software can collect the 4K HDMI video signal input by the conversion chip LT6911, and after video processing, the 4K HDMI video signal is displayed on a 4K display screen according to a specified position and size, or after being coded, the 4K video signal is converted into Ethernet data according to a specified protocol, and the Ethernet data is transmitted to a display control computer exchange board through the Ethernet for storage or displayed by other display equipment; the 4K video in the H.264 format transmitted by the Ethernet can be decoded and displayed in real time through a 4K display screen; and multi-channel video superposition can be realized as required, the decoded video image can be displayed in a window of a 4K display screen, and size and position adjustment is supported.
The display control computer exchange board realizes the control of the Haisi image processing chip and the video transmission function with the Haisi image processing chip Hi3559AV100 through a gigabit Ethernet.
The invention also provides a method of a 4K video display control device based on a localization Haisi Platform, which is realized by 4K video coding and decoding and display control software installed on a Haisi image processing chip Hi3559AV100, wherein the software is based on a Haisi Media Processing Platform (MPP) and runs in an embedded Linux system, as shown in FIG. 2, and the method comprises the following steps:
step 1, reading a configuration file by a Haesi image processing chip Hi3559AV100, initializing variables, and initializing LT6911UXC interruption;
step 2, carrying out video input and output, encoding and decoding and video processing module configuration;
and 3, starting a mouse control thread, a multi-window video control thread and an encoding and decoding test thread to realize the functions of controlling video encoding and decoding and displaying videos in a superposition manner.
The mouse control thread is mainly used for realizing the function of controlling the display of a video window by a mouse, and comprises the steps of overlapping a mouse pointer bmp picture at a specified position of a video display interface, and adjusting the priority of a video layer after clicking by the mouse; temporarily storing the display position of the video layer, recovering the display position of the video layer, setting the display area of the video layer and the like in the maximized operation of double-clicking the window by the mouse; adjusting the priority of the video layer, setting the display area of the video layer and the like after dragging the mouse.
The multi-window video control thread realizes the functions of controlling the sizes and the positions of different video display windows mainly by receiving and analyzing an instruction of an upper computer (a display control computer exchange board), and comprises the steps of starting an RTSP service thread and starting a coding channel to receive an input image; closing the coding channel and ending the RTSP service process; starting an RTSP client thread, enabling a decoding channel, receiving a code stream sent by a user, and setting a display channel; closing the decoding channel and ending the RTSP client thread; starting/ending a video file playing thread; and setting a video layer display area, priority, code rate and the like.
The coding and decoding test thread is used for simultaneously starting two paths of test programs with video coding, decoding and displaying functions.
Step 4, the Haisi image processing chip Hi3559AV100 communicates with the conversion chip LT6911, when video is input at the input end, the LT6911UXC interrupt response function SigResolutionSwitchHander is triggered, the register of the SigResolutionSwitchHander is read to obtain the resolution of the input video, the inserted user picture (HI _ MPI _ VI _ DisableUserPic) is started, then the obtained HDMI to MIPI input parameters are processed by calling the H264CodecVpssVo function, after being decoded by the VDEC, the decoded stream is processed by the VPSS, such as zooming, noise reduction and the like, and finally, the display information is output through VO configuration and is output to the HDMI 4K display screen.
As shown in fig. 3, the processing flow of the LT6911UXC interrupt response function is:
enabling external IIC communication;
secondly, reading the register to obtain configuration information (reading the register to obtain the resolution of the input video);
turning off external IIC communication;
enabling the inserted user picture HI _ MPI _ VI _ EnableUserPic;
calling a video encoding and decoding processing H264CodecVpssVo function;
sixthly, forbidding inserting of the user picture HI _ MPI _ VI _ DisableUserPic;
the calling of the video codec processing H264 codecvssvo function in the step fifthly configures parameters such as video input and output, codec channels, and the like, as shown in fig. 4, the processing flow is as follows:
1) initialization VI (HDMI input)
2) Initializing a HIMPP SYS and a universal VB buffer;
3) setting the public buffer pool attribute of the general buffer area;
4) configuring VI parameters and starting VI;
5) configuring and starting a decoder VDEC;
6) configuring VPSS parameters and starting VPSS;
7) configuring VO parameters and starting VO;
8) configuring and starting a coder VENC;
9) binding VI with a coder VENC and binding VI with a VPSS;
10) binding a decoder VDEC to a VPSS and binding the VPSS to a VO;
11) and pushing video stream data.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (9)
1. A4K video display control device based on a localization Haisi platform is characterized in that: the image processing device comprises a Haisi image processing chip, an HDMI video signal interface conversion chip, a display control computer exchange board and a 4K display screen, wherein the HDMI interface conversion chip receives an HDMI video signal and converts the HDMI video signal into an MIPI video signal, 4K video coding and decoding and display control software is arranged in the Haisi image processing chip, the MIPI video signal is received and converted into the 4K HDMI video signal, the 4K display screen receives and displays 4K HDMI video data of the Haisi image processing chip through an HDMI interface, and the display control computer exchange board is connected with the Haisi image processing chip through a gigabit Ethernet to realize display control and video transmission functions.
2. The device for controlling display of 4K video based on the localization haisi platform according to claim 1, wherein: the HDMI video signal interface conversion chip is connected with the Haisi image processing chip through the IIC interface.
3. The device for controlling 4K video display based on the localization haisi platform according to claim 1 or the above, wherein: the Haisi image processing chip adopts a Hi3559AV100 chip, and the HDMI video signal interface conversion chip adopts an LT6911 chip.
4. A 4K video display control method based on a localization haisi platform, applied to the 4K video display control device based on the localization haisi platform of claim 1, 2 or 3, characterized in that: the method comprises the following steps:
step 1, a Haesi image processing chip reads a configuration file, initializes variables and initializes LT6911UXC interrupt response functions;
step 2, carrying out video input and output, encoding and decoding and video processing module configuration;
step 3, starting a mouse control thread, a multi-window video control thread and an encoding and decoding test thread;
and step 4, the Haisi image processing chip communicates with the HDMI video signal interface conversion chip, when video is input at the input end, an LT6911UXC interrupt response function is triggered, a register of the response function is read to obtain the resolution of the input video, a user picture is inserted, the obtained HDMI to MIPI input parameters are processed by calling an H264CodecVpssVo function, the decoded stream is processed by a VPSS to generate a 4K HDMI video signal after being decoded by a VDEC, and finally the 4K HDMI video signal is output to a 4K HDMI display screen through VO configuration.
5. The 4K video display control method based on the localization Haisi platform according to claim 4, wherein: the mouse control thread is used for realizing the function of controlling the display of the video window by the mouse, and comprises the steps of overlapping a mouse pointer bmp picture at a designated position of a video display interface, adjusting the priority of a video layer after the mouse clicks, temporarily storing the display position of the video layer, recovering the display position of the video layer and setting a display area of the video layer in the maximized operation of double-clicking the window by the mouse; and adjusting the priority of the video layer and setting the display area of the video layer after the mouse is dragged.
6. The 4K video display control method based on the localization Haisi platform according to claim 4, wherein: the multi-window video control thread: receiving and analyzing instructions of a display control computer exchange board, realizing the functions of controlling the sizes and positions of different video display windows, and comprising the steps of starting an RTSP service thread, starting an encoding channel to receive an input image, closing the encoding channel, ending an RTSP service process, starting an RTSP client thread, enabling a decoding channel, receiving a code stream sent by a user, setting a display channel, closing the decoding channel and ending the RTSP client thread; starting/ending a video file playing thread; and setting a display area, priority and code rate of a video layer.
7. The 4K video display control method based on the localization Haisi platform according to claim 4, wherein: and the coding and decoding test thread is used for simultaneously starting two paths of video coding, decoding and displaying functions.
8. The 4K video display control method based on the localization Haisi platform according to claim 4, wherein: the processing flow of the LT6911UXC interrupt response function is as follows:
enabling external IIC communication;
reading the register to obtain the resolution of the input video;
turning off external IIC communication;
enabling the inserted user picture HI _ MPI _ VI _ EnableUserPic;
calling a video encoding and decoding processing H264CodecVpssVo function;
sixthly, inserting a user picture HI _ MPI _ VI _ DisableUserPic is forbidden.
9. The 4K video display control method based on the localization haisi platform according to claim 8, wherein: the processing method of the H264CodecVpssVo function in the video coding and decoding processing comprises the following steps: initializing a VI; initializing a HIMPP SYS and a universal VB buffer; setting the public buffer pool attribute of the general buffer area; configuring VI parameters and starting VI; configuring and starting a decoder VDEC; configuring VPSS parameters and starting VPSS; configuring VO parameters and starting VO; configuring and starting a coder VENC; binding VI with a coder VENC and binding VI with a VPSS; binding a decoder VDEC to a VPSS and binding the VPSS to a VO; and pushing video stream data.
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