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为了解决现有的移动终端视频实时传输上具有的问题,文中针对H.263以及H.264视频编码方式特点,分别提出了与其相适应的封装方法,减少了实时传输协议包的额外浪费,提高了视频的传输效率。实验测试显示,在帧率和分辨率最低时,H.263以及H.264视频编码方式下的峰值信噪比(PSNR)均在30 dB以上,已满足了视频传输的最低要求,而当帧率在24 Hz时,两种编码方式的PSNR均在40 dB以上,视频传输质量理想。此外,两种编码方式下丢包率最大在10%左右,延时最大在400 ms以内,均达到了视频实时传输的要求。
In order to solve the problems existing in the real-time video transmission of mobile terminals, aiming at the characteristics of H.263 and H.264 video coding methods, a package method is proposed to reduce the extra waste and increase of real-time transmission protocol packets Video transmission efficiency. Experimental tests show that at the lowest frame rate and resolution, the peak signal-to-noise ratio (PSNR) of H.263 and H.264 video coding methods are both above 30 dB, which meets the minimum requirement of video transmission. When the frame At 24 Hz, the PSNR of both encoding modes is above 40 dB, and the video transmission quality is ideal. In addition, the maximum packet loss rate under the two coding modes is about 10% and the maximum delay is within 400 ms, all meeting the requirements of real-time video transmission.