A detection method of non-standard format 3g-sdi image
A technology of 3G-SDI and detection method, applied in the field of information data transmission, can solve the problem of inability to realize non-standard format 3G-SDI image resolution image frame rate detection, inability to correctly view video and related parameters, and inability to know data Source correctness and other issues, to achieve the effect of low error rate, reduced resolution, and easy realization
Active Publication Date: 2021-10-12
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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In recent years, in order to meet the high-definition and high-resolution video transmission requirements, the SDI signal transmission rate has been increasing, from 270Mbit / s, 1.485Gbit / s, 2.970Gbit / s, etc. For standard SDI video transmission, the acquisition card can be used to output Watch the video and video-related parameters (resolution, frame rate, etc.) on the monitor, but for non-standard format SDI signal transmission display, the capture card on the market cannot correctly watch the video and related parameters
[0003] The Chinese patent, the announcement number is CN109495707A, discloses a "a high-speed video acquisition and transmission system and method". The system includes two parts: a sending end and a receiving end. SDI interface output, the receiving end recovers non-standard format high-speed images through demapping rules after receiving through dual 3G-SDI interfaces. The disadvantage of the above invention is that this method cannot realize the image resolution and image frame of non-standard format 3G-SDI images. Frequent detection, so that it is impossible to know the correctness of the data source at the sending end, and at the same time, it is impossible to know whether there are problems such as frame loss during data transmission
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[0056] figure 1 An image data detection system is provided, including a 3G-SDI sending end, a 3G-SDI receiving end, FPGA and a host computer;
[0057] The 3G-SDI transmitter sends a frame of 2048*2025 black and white images with a total of 4,147,200 bytes. When the SDI output interface of the 3G-SDI transmitter is transmitted in 1080P format, a frame of images is 1920*1080*2=4,147,200 bytes. (Here 2 means one byte each for luma channel and chroma channel). Therefore, one frame of 2048*2025 black and white image can be loaded into one frame of SDI color image for transmission. Considering that the black and white image frame rate of 2048*2025 is 100fps, it needs to use two SDI interfaces to output at the same time.
[0058] At the same time, the 3G-SDI receiving end uses two 3G-SDI input interfaces to receive non-standard 2048*2025@100fps black and white video data, and the 3G-SDI standard selects 1080p@50fps. The standard format HD video image data is 1920*1080@50fps, the i...
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The invention discloses a detection method of a 3G-SDI image in a non-standard format, which realizes the detection of the full resolution and frame frequency of the 3G-SDI image in a non-standard format, thereby realizing the correctness of the data source of the sending end and the data An effective evaluation method is provided for whether there are problems such as frame loss in the transmission process. The method includes the following three detection modes: mode one: full resolution detection of images; mode two: image frame rate detection; mode three: image display effect detection.
Description
technical field [0001] The invention belongs to the technical field of information data transmission, and in particular relates to a detection method of a non-standard format 3G-SDI image. Background technique [0002] The serial digital interface (Serial Digital Interface, SDI) is used to transmit the serial digital video signal (Serial Digital Interface video signal, SDI signal) to realize the digitization of movies and radio and television. In recent years, in order to meet the high-definition and high-resolution video transmission requirements, the SDI signal transmission rate has been increasing, from 270Mbit / s, 1.485Gbit / s, 2.970Gbit / s, etc. For standard SDI video transmission, the acquisition card can be used to output Watch the video and video-related parameters (resolution, frame rate, etc.) on the monitor, but for non-standard format SDI signal transmission display, the capture card on the market cannot correctly watch the video and related parameters. [0003] Th...
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IPC IPC(8): G06T7/00G06T11/60H04N17/00
CPCG06T7/0002G06T11/60H04N17/00
Inventor 边河张海峰张德瑞王华方尧谢庆胜
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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