Compression of Proposed US Spectrum-Compatible HDTV Formats for Digital Transmission at 44 Million Bites Per Second

这项研究将先进的视频压缩技术应用于高清晰度电视信号，以便在44Mb/S设备上传输。这项研究评估了图像压缩技术，特别是离散余弦变换，对向FCC提出的用于HDTV射频传输的频谱兼容双通道方案中所使用的3 MHz“放大通道”的压缩的适用性。主要的工具是使用VAX小型机非实时地对HDTV运动图像进行计算机模拟。通过模拟，可以洞察哪些建议的系统最适合进行数字压缩，并通过MSE和伪像的主题分析了解需要什么比特率才能获得良好的性能。根据最初的发现进行算法更改和发明，并进行额外的模拟以进一步发展知识库。最后一步是使用结果，加上与NTSC兼容的通道的现有压缩知识，以估计可用的设施比特率为44 Mb/S。*

This research applies advanced video compression techniques to High Definition Television (HDTV) signals for transmission over 44 Mb/s facilities. The research assesses the applicability of image compression techniques, especially the Discrete Cosine Transform, to compression of the 3MHz "Augmentation Channel" used in the spectrum-compatible two-channel schemes proposed to the FCC for radio frequency transmission of HDTV. The primary tool is computer simulation of HDTV motion images in non-real time using VAX minicomputers. Simulation allows insight into which proposed systems lend themselves best to digital compression, and learning what bitrates are required to achieve good performance as measured by MSE and subject analysis of artifacts. Algorithmic changes and inventions are made in response to the initial findings, with additional simulations to further develop the knowledge base. A final step is to use the results, plus existing knowledge of compression for the NTSC-compatible channel, to estimate the available facility bitrate of 44 Mb/s.***