A method for simultaneous transmission of hd and 4k HDR video signals and SDI equipment
A 4KHDR, video signal technology, applied in simultaneous/sequential multi-TV signal transmission, by changing the field conversion of the input video signal, digital video signal modification and other directions, can solve the problem of no compatibility, can not meet 4K and HD, TICO can not be simultaneously Taking into account issues such as 4K and HD to achieve upward compatibility
Active Publication Date: 2022-03-04
CHENGDU SOBEY DIGITAL TECH CO LTD
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, TICO has two main disadvantages: First, TICO uses the effective area of the SDI image to transmit encoded data. Both the encoding sending end and the decoding receiving end must use equipment that supports TICO to work normally, and there is no compatibility with standard SDI equipment.
Second, TICO cannot take into account both 4K and HD at the same time. One SDI channel can only have one video system, either 4K or HD, which cannot meet the needs of simultaneous transmission of 4K and HD.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0026] SDI devices send SDI video signals in the following steps:
[0027] SDI video signal generation step S11:
[0028] 4K HDR enhancement part generation steps: use source 4K HDR video signal to generate uncompressed HD SDR video signal and compressed 4K HDR enhancement part; uncompressed HD SDR video signal combined with 4K HDR enhancement part can restore 4K HDR video signal ;
[0029] Data embedding step: embedding the uncompressed HD SDR video signal and 4K HDR enhancement layer coding together into the SDI video signal to be sent;
[0030] Sending step S12: sending the SDI video signal through the HD-SDI channel; the HD-SDI channel is a 1.5G-SDI channel or a 3G-SDI channel.
[0031] Wherein, the SDI video signal generating step is specifically realized through the following steps, as figure 2 Shown:
[0032] 4K HDR enhanced part generation steps:
[0033]Perform wavelet transform DWT on the image of the source 4K HDR video signal, transform once in the horizontal...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for realizing simultaneous transmission of HD and 4K HDR video signals and SDI equipment. The sending device uses the source 4K HDR video signal to generate an uncompressed HD SDR video signal and embeds the compressed and encoded 4K HDR enhancement part into the SDI video signal to be sent; finally sends the SDI video signal through the HD‑SDI channel; the receiving device receives the video signal from SDI video signal of HD-SDI channel; if HD SDR video signal is required, the uncompressed HD SDR video signal is output directly from the SDI video signal; if 4K HDR video signal is required, the 4K HDR enhanced part is decompressed, and finally used The uncompressed HD SDR video signal and 4K HDR enhanced part can be restored to get 4K HDR video signal and then output. The present invention realizes synchronous transmission of 4K and HD video signals in one HD-SDI channel, provides a basis for 4K / HD co-production and co-broadcasting of television stations, and realizes upward compatibility of 1.5G-SDI and 3G-SDI equipment .
Description
technical field [0001] The invention relates to a digital serial interface SDI signal transmission technology, in particular to a method for realizing simultaneous transmission of HD and 4K HDR video signals and SDI equipment. Background technique [0002] In my country's radio and television industry, the high-definition construction of various TV stations has been basically completed. The most used HD signal transmission is HD-SDI, including 1.5G-SDI and 3G-SDI. Each TV station has a large number of 1.5-SDI and 3G-SDI equipment. Digital serial interface SDI equipment is used to transmit serial digital component signals, and cannot directly transmit compressed digital signals. [0003] Such as figure 1 As shown, one frame of HD-SDI contains two digital fields, the total number of rows is 1125, and the total number of columns is 2640. 1080 effective lines per frame. Among them, lines 1124, 1125 and 1-20 are located in the digital vertical blanking area of the first fi...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/04H04N5/765H04N7/01H04N7/08H04N19/30
CPCH04N5/04H04N7/0125H04N7/0127H04N7/0806H04N5/765H04N19/30
Inventor 张金沙王炜查晓辉
Owner CHENGDU SOBEY DIGITAL TECH CO LTD