Comcast cable service is primarily aired in Standard Definition, suitable for 4x3 ratio televisions, typically CRT. Subscribing to Comcast HD unlocks channels aired in High Definition, suitable for 16x9, 16x10, and other widescreen ratio televisions, typically LCD or Plasma. Because of the larger amount of pixels and information, the picture can be seen more clearly, and small details such as type or print can more easily be read. In addition, most HD resolution content contains extra detail on the sides that normal TVs would not display.
The HD channel for Disney Channel on comcast is 244
Disney Jr is not available in HD yet on Comcast
Viewing the high definition (HD) channels provided by cable company Comcast require specific equipment. First, an HD television is needed. Then, an HD set top box from Comcast is needed.
879
Nickelodeon, which is 679 (HD) 40 (non-HD)
259
807
894
The Comcast HD DVR to some is not reliable, many have switched services or started using Tivo, which has been around for a lot longer and is the best.
Comcast Sports Net HD (Hi-Def)
Yes.
Channel 879 on HD