HD compromises – “near HD” – “HD Lite”
Aug/091
High definition video imposes huge requirements on bandwidth for the video data stream. The requirements are so high that many enthusiasts consider the bandwidth in the BluRay(40mbps) and HD-DVD(28mbps) to be inadequate to get a “decent fidelity” HD video playback. Well this is formally true … in some cases. In practice we’ve lived with the low standard definition(SD) content for more than two generations now. If the technology still struggles with single consumer solutions, what do we do with HD video on the web then? Besides the raw bandwidth there are other solutions improving the odds in our favor a bit.
HD web video
Jul/094
High definition video or HD video as it is known, is digital video with higher resolution than the previous standards (i.e. SD video and DVD). This high resolution is achieved through new video file formats, which allow new codecs, certain performance optimizations (like deblocking) and a lot higher bandwidth(bitrate).
HD resolutions are noted with the number of lines and if it is progressive or interlaced stream. Thus 540p for instance means – resolution 960 x 540 pixels (assuming 16:9 aspect ratio) and progressive stream. Note that interlaced streams are primarily available for compliance with older standards like DVD.