based on the research on video coding, a software codec based on h . 263 is developed 然后根据对h.263视频源编码算法的研究,对算法实现软件代码化,实现了软件编解码器的研制。
based on the system, i discuss the method of developing net programs with delphi and introduce the software codec in windows and the software interface for codec, audio compression manager and video compression manager to perform real-time audio and video processing . audio captures and video captures based on directshow and video display based on directdraw are introduced . we also discuss the method of synchronization for audio and video and the method of developing own component with delphi 重点讨论了利用delphi开发网络程序的方法:windows环境下用于压缩多媒体数据的音频视频软件压缩解压缩器(codec)及相应的软件接口音频压缩管理器(acm)和视频压缩管理器(vcm);音频采集技术和基于directshow技术的视频采集技术;基于directdraw技术的视频显示技术;多媒体视频会议系统中实现音频和视频同步的方法;利用delphi开发自定义组件的方法,并给出了相应的delphi程序实例。
the paper studies the theory and coding methods of the low bit rate video recommendation h . 263 + detailedly, realizes real-time software codec based on h . 263 + under linux os, furthermore, finishes some negotiable coding options which can observably improve the coding efficiency, such as advanced prediction mode, advanced intra coding mode, deblocking filter mode and modified quantization mode 263+的原理和编码方法做了深入的研究,软件实现了基于h263+标准的视频编译码器在linux操作系统下的实时编解码,并实现了能显著提高编码效率的几种可选编码模式,主要包括先进预测模式、先进帧内编码模式、块边界滤波模式和改进量化模式等。