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Audio and video data transmission method based on drivers of FFmpeg and EMIF

A data transmission method and technology for data transmission, applied in embedded audio and video, involving the field of video, can solve problems such as poor portability and unfavorable secondary development, and achieve the effect of simplifying the transmission process and improving portability

Active Publication Date: 2019-07-19
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned technologies, and provide a method for transmitting audio and video data driven by FFmpeg and EMIF, which is used to solve the technical problems of poor portability and unfavorable secondary development in the prior art

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  • Audio and video data transmission method based on drivers of FFmpeg and EMIF
  • Audio and video data transmission method based on drivers of FFmpeg and EMIF
  • Audio and video data transmission method based on drivers of FFmpeg and EMIF

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and specific embodiment, the technical scheme of the present invention is described in detail:

[0031] refer to figure 1 , realize the embedded audio-video system that the present invention adopts:

[0032] The embedded audio and video system includes a camera, a microphone, a video analog-to-digital conversion module, an audio analog-to-digital conversion module, a digital signal processor DSP and a programmable gate array FPGA. Collect image analog signals and audio analog signals through cameras and microphones, convert them into image digital signals and audio digital signals through video analog-to-digital conversion modules and audio analog-to-digital conversion modules, and compress image digital signals and audio digital signals on DSP and package, and then transmit the packaged audio and video data on the DSP to the FPGA through the EMIF driver.

[0033] refer to figure 2 , the present invention comprises the ...

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Abstract

The invention provides an audio and video data transmission method based on drivers of FFmpeg and EMIF. The method is used for solving the technical problems of poor portability and unfavorable secondary development in the prior art, and includes the following implementation steps: preforming analog-to-digital conversion on an audio analog signal and an image analog signal; compressing the audio digital signal and the image digital signal on DSP; encapsulating audio-compressed data and image-compressed data on the DSP; writing a user space driver of an external memory interface EMIF; and transmitting the encapsulated audio and video data to FPGA based on the user space drivers of the FFmpeg and the EMIF. As the FFmpeg supports a plurality of operating systems, the portability of the methodis strong; the FFmpeg provides rich audio and video processing function interfaces, so that the method is beneficial to secondary development; and by writing the user space driver of the EMIF, the step of a kernel driver of the EMIF by loading the driver into the kernel is omitted.

Description

technical field [0001] The invention belongs to the technical field of embedded audio and video, and relates to an audio and video data transmission method, in particular to an audio and video data transmission method driven by FFmpeg and EMIF user space and realized by an embedded audio and video system, which can be used for video monitoring, Video conferencing and other fields involving video. Background technique [0002] With the development of embedded technology, especially data computing chips such as DSP and FPGA can perform fast and efficient computing on a large amount of data, and the application of audio and video technology in embedded systems is becoming more and more mature. The relationship between DSP and FPGA Audio and video data transmission has become a hot issue. There are currently many methods for audio and video transmission between DSP and FPGA, including transmission through network protocols and transmission through SPI or EMIF interfaces. It is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00H04N19/124H04N19/42G06F13/40G06F13/10
CPCG06F13/102G06F13/4068G10L19/00H04N19/124H04N19/42
Inventor 那彦高兴鹏王金鹏陈建春乜亮王强军
Owner XIDIAN UNIV
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