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A system and method for accurately obtaining uncompressed video and audio data through a graphics card

A technology of audio data and video data, which is applied to TV system components, electrical digital data processing, and color TV components. It can solve problems such as insufficient bandwidth, high bus transmission pressure, and large data bandwidth, and reduce transmission Effects of pressure, improved real-time, and speed

Active Publication Date: 2015-11-18
BEIJING DAYANG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the full HD system (such as 1920*108050p), the total data bandwidth required will be relatively large. At this time, it is generally necessary to select a host that supports higher bandwidth PCI-E specifications (such as PCI-E8X, 16X) To avoid insufficient bandwidth, which will obviously increase the cost of the product
Even if a high-bandwidth bus is used, due to the high pressure of bus transmission, it often becomes the bottleneck of transmission, affecting the real-time transmission of video and audio data

Method used

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  • A system and method for accurately obtaining uncompressed video and audio data through a graphics card
  • A system and method for accurately obtaining uncompressed video and audio data through a graphics card
  • A system and method for accurately obtaining uncompressed video and audio data through a graphics card

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Experimental program
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Embodiment 1

[0022] In this embodiment, a system for accurately obtaining uncompressed video and audio data through a graphics card, the system diagram is as follows figure 1 shown. This embodiment includes: a host computer with memory and multiple buses, a graphics card connected to the host through the bus, and the graphics card connected to the IO card through the DVI interface.

[0023] The DVI described in this embodiment is an acronym for Digital Visual Interface (Digital Visual Interface), which is a digital video interface technology, generally used for direct video signal transmission between a graphics card and a display, and generally does not transmit audio signals.

[0024] In the production of radio and television programs, it is often necessary to use the graphics card to perform some processing such as rendering, aliasing, and adding subtitles on the collected video data, and then the processing results are transmitted to the memory through the data bus in the host, and the...

Embodiment 2

[0031] This embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment regarding the connection mode of the graphics card and the IO card. The IO card described in the present embodiment is connected on the host computer of same computer with described graphics card through PCI-E bus, as figure 1 shown.

[0032] In this embodiment, the graphics card and the IO card on a computer are connected together with a DVI interface, that is to say, the processed video and audio data of the machine is directly output through the IO card of the machine itself.

Embodiment 3

[0034] This embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment regarding the connection mode of the graphics card and the IO card. The IO card described in the present embodiment is connected on the main frame of different computers with the described graphics card through the PCI-E bus, as figure 2 shown.

[0035] In this embodiment, video and audio files enter the IO card of computer 1, are converted into video and audio data, and are stored in the internal memory of computer 1, then accelerated processing is performed by the graphics card on computer 1, and the video and audio data after processing is passed through computer 1 The DVI interface of the graphics card on the computer is transmitted to the DVI interface of the IO card of computer 2, such as figure 2 shown. Such an output mode can reduce the pressure on the IO card on the computer 1 .

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Abstract

The invention relates to a system and a method for accurately obtaining non-compressed video and audio data by a display card. The system comprises a host of a computer and the display card, wherein the host of the computer is provided with a memory and a plurality of buses, the display card is connected with the host by the bus, and the display card is connected with an IO (input / output) card by a DVI (digital visual interface). The method comprises the following steps of directly connecting the display card with the IO card together by the DVI, and defining a protocol of the DVI transmitting various types of video and audio formats, so the common DVI not only can transmit video signals, but also can transmit audio signals. Compared with the prior art, the system and the method have the advantages that the original four paths for transmitting the video and audio data of the data buses in the host are reduced to two paths, so the transmission pressure of the data buses in the host is obviously reduced, and the data buses with relatively low cost can be adopted as the data buses in the host; because the DVI has high transmission speed, the video and audio data can be very conveniently transmitted, the speed of the video and audio transmission is greatly increased, and the transmission real-time performance of the video and audio data is effectively improved.

Description

technical field [0001] The invention relates to a system and method for accurately obtaining uncompressed video and audio data through a graphics card, a method for computer systems and data processing, and a system and method for processing uncompressed video data. Background technique [0002] In broadcasting and television program production, when it comes to video processing, the computer system often uses the graphics processing capability of the computer's internal graphics card to accelerate, so as to reduce the calculation load of the CPU. In a traditional computer system, video and audio signals such as SDI and HDMI are first collected into the computer memory through an IO (input output) card. When the video needs to be processed, the video signal is sent to the graphics card for processing, and then the result is sent back to the memory. If the processed data needs to be broadcast again, the video and audio data needs to be sent to the IO card, and the IO card wil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/262G06F13/38G06F3/14
Inventor 金廷满兰晓明韩光王雨
Owner BEIJING DAYANG TECH DEV