High-definition serial digital interface data converting method and device

A digital serial interface and data technology, applied in the field of high-definition digital serial interface data conversion methods and devices, can solve problems such as reducing video quality, and achieve the effects of small delay, rich solutions, and improved system compatibility

Active Publication Date: 2012-11-28
武汉微创光电股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention provides a high-definition digital serial interface data conversion method, which aims to solve the technical problem that the existing technical solution for HD-SDI data after compression and encoding reduces the video quality

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  • High-definition serial digital interface data converting method and device
  • High-definition serial digital interface data converting method and device
  • High-definition serial digital interface data converting method and device

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Embodiment 1

[0050] figure 2 A flow of a high-definition digital serial interface data conversion method provided by the first embodiment of the present invention is shown, and only parts related to the embodiment of the present invention are shown for convenience of description.

[0051] The embodiment of the present invention describes the technical solution of the present invention from the side where parallel 4:2:2 YCbCr video data is converted into parallel 4:2:0 YCbCr video data, including:

[0052] Step S201, writing the upper 8 bits of the luminance Y data in the parallel 4:2:2 YCbCr video data into the high-order luminance cache, and writing the lower 2 bits into the low-order luminance cache;

[0053] Step S202, delete the chroma Cb data of half the number of lines in the YCbCr video data, and write the upper 8 bits of the chroma Cr data into the high-order chroma cache, and write the lower 2-bit data into the low-order chroma buffer, and write The other half of the chroma Cr d...

Embodiment 2

[0064] image 3 A high-definition digital serial interface data conversion method provided by the second embodiment of the present invention is shown, and only parts related to the embodiment of the present invention are shown for convenience of description.

[0065] Step S301, perform line load balancing on the connected high-definition digital serial interface data, and convert it into a pair of high-speed differential digital signals;

[0066] Step S302, performing serial-to-parallel conversion on the differential digital signal to obtain parallel 4:2:2 YCbCr video data, and extracting a clock signal and a corresponding synchronization information status indication therefrom.

[0067] The above three steps are the pre-order steps for realizing data conversion, and the purpose is to obtain parallel 4:2:2 YCbCr video data with invalid data removed. Firstly, the HD-SDI signal transmitted by the high-definition video camera is load-balanced to convert it into a pair of high-sp...

Embodiment 3

[0079] Figure 5 The flow of a high-definition digital serial interface data conversion method provided by the third embodiment of the present invention is shown, and only the parts related to the embodiment of the present invention are shown for convenience of description.

[0080] Embodiments of the invention describe the technical solution of the present invention from the side where parallel 4:2:0 YCbCr video data is converted into parallel 4:2:2 YCbCr video data, including:

[0081] Step S501, write the upper 8 bits of the luminance Y data in the parallel 4:2:0 YCbCr video data into the second high-order luminance buffer, write the lower 2 bits into the second low-order luminance buffer, and write the chrominance Cb data The upper 8 bits of the chroma Cr data are written into the second high-order chroma buffer, and the lower 2 bits are written into the second low-order chroma buffer.

[0082] Need to obtain the YCbCr video data of parallel 4:2:0 before realizing this st...

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Abstract

The invention is suitable for the technical field of security monitoring, and provides a high-definition serial digital interface data converting method and device. The high-definition serial digital interface data converting method comprises the steps of: writing high 2 orders of brightness Y data in video data of parallel 4:2:2 into a high-order brightness cache, low 2 orders into a low-order brightness cache; deleting chroma Cr data of half line numbers in the video data, writing high 8 orders of the chroma Cr data into a high-order chroma cache, low 2 order data into a low-order chroma cache, deleting chroma Cr data in the other half line numbers, writing high 8 orders of the chroma Cb data into the high-order chroma cache, low 2 order data into the low-order chroma cache; and writing prepared 4:2:0 video data in the high-order brightness cache, the low-order brightness cache, the high-order chroma cache and the low-order chroma cache into a storage. According to the invention, high-definition video data is transmitted through a gigabit Ethernet under the premise of no compression of the video data, and the solution of high-definition video transmission is enriched.

Description

technical field [0001] The invention belongs to the technical field of security monitoring, and in particular relates to a high-definition digital serial interface data conversion method and device. Background technique [0002] In the field of security monitoring, with the continuous development of video monitoring technology, the trend of video monitoring system requiring high-definition and digitalization has become more and more obvious. Serial Digital Interface (SDI) is a video interface standard system formulated by the SMPTE organization. Its interface is mainly used to transmit uncompressed digital video signals. It has been widely used in radio and television and other related industries. High-definition Serial Digital Interface (HD-SDI) complies with SMPTE 274M and SMPTE 292M standards, supports video signal transmission rates of 1.485Gb / s and 1.485 / 1.001Gb / s, and can transmit images with a resolution of 1920×1080 HD video images. Compared with other high-definit...

Claims

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Application Information

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IPC IPC(8): H04N7/01H04N5/765
Inventor 杨红杰严诚李竞
Owner 武汉微创光电股份有限公司
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