Video signal conversion method and system
A technology of video signal and conversion method, applied in the field of video transmission, can solve the problems of inability to guarantee the signal, the receiver loses synchronization, and is not conducive to clock recovery, and achieves the effect of avoiding the black screen of the display
Active Publication Date: 2018-02-06
华平祥晟(上海)医疗科技有限公司
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Problems solved by technology
[0003] One problem is: the optical fiber transmission of the SDI interface is prone to black screen at the receiving end. Although it will return to normal in an instant, it will greatly affect the user experience.
The NRZI code itself cannot guarantee that the signal does not contain long-connected "0" or long-connected "1", which is not conducive to clock recovery
During transmission, when there is a long string of consecutive bits (maybe thousands of "0"s in a row or thousands of "1s" in a row), it is difficult to determine the end of one bit and the beginning of another. At this time, the receiver It may lose synchronization and cannot detect the correct number of "0"s in the continuous string
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[0037] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
[0038] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the compo...
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The invention provides a video signal conversion method and system. A video signal received by a universal video interface is encoded and transmitted through a private protocol, and is then displayedthrough decoding, a conventional optical fiber transmission method employing an SDI interface is replaced, the problem of black screen of a display due to loss synchronization brought by the SDI interface through the optical fiber transmission is avoided, and the problem that the SDI interface does not support various video resolutions is also avoided.
Description
technical field [0001] The invention relates to the field of video transmission, in particular to a video signal conversion method and system. Background technique [0002] At this stage, lossless video transmission generally adopts DVI, HDMI, SDI and other interfaces. Among them, DVI and HDMI interfaces use special wires, which can normally transmit a distance of about 30 meters, and the application scenarios are limited; SDI interfaces can use coaxial cables or optical fibers. , due to the bulky coaxial cables and low cost performance, more and more applications like to use optical fiber to transmit lossless video. However, although the optical fiber transmission of the SDI interface has good compatibility, there are two common problems. [0003] One problem is: the optical fiber transmission of the SDI interface is prone to black screen at the receiving end. Although it will return to normal in an instant, it will greatly affect the user experience. The reason is: the S...
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IPC IPC(8): H04N7/01
CPCH04N7/01H04N7/0117
Inventor 李小炜陈宵翔汪小光
Owner 华平祥晟(上海)医疗科技有限公司