基于H.264,MPEG4 MP3等編碼格式的高清編碼器
[Abstract]:The high definition encoder in this paper supports H.264 MPEG4, G.711mp3 video and audio compression algorithm. Its purpose and advantage is that it also has excellent video and audio reducibility in the case of low network bandwidth, which greatly reduces the pressure of network transmission. Users can watch live video through a common player. Can be widely used in banking, security, military, schools and other areas. The research method is to use embedded architecture to realize audio and video coding, real-time network transmission, and client software to decode and play audio and video signals. The embedded system includes hardware and software, so it is necessary to develop embedded software which meets the function requirement on the high-definition coding board developed by oneself. Embedded products can not be separated from the support of hardware. New TMS320DM368 (integrated ARM9/DSP) video processor has been announced using Texas Instruments (TI), and the performance has been improved. The innovation is that it is hardcoded and implemented by the DSP (HDVICP) inside the processor. The application only needs to call some interfaces of the DSP side, which shortens the developer's development cycle. The developed embedded software needs the support of operating system in order to manage system resources, schedule multiple applications, manage file system, etc. The whole embedded Linux includes U-BOOT boot program. Linux kernel, file system, application software part. The practice shows that the developed high-definition encoder achieves the required functions, the compressed and encoded data become very small for transmission over the network, and the quality of the image viewed by the client through VLC is very clear.
【學(xué)位授予單位】:北京郵電大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類號(hào)】:TN762;TP368.1
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