Teclast C700 7-inch portable media player
Recently many portable media players from China have or are alleged to have the ability to handle 720p or 1080p videos, but the obvious disadvantage for these devices are their small screens that are around 4.3 or 5 inches. Watching HD videos over such tiny displays you are defnitely not satisfied. So have a look at Teclast’s new PMP C700. It gets a 7 inches 1024×600 display, and moreover, it supports 1080p videos. Currently other specs are still not disclosed.
[Source:iMP3]
June 14th, 2010 at 1:20 pm
still bad
600 is more than 480 but stil is less than 720
and that means that playing 720p video would require on the go downsizing, so this would require strong processor, feed it with much work (sucking battery faster than needed) and making quality relatively poor (hi quality downscaling video in reatime would require much more powerful CPU than PMPs can have)
i wanna …x720 Mirasol-based screens
June 18th, 2010 at 9:03 pm
Actually, that’s not true anymore. Hardware upscaling/downscaling comes really cheap now, and is only a fraction of a watt on a power-optimized mobile GPU. Many mobile video chips already have dedicated transistors/silicon to do realtime upconversion/downconversion — just see the iPhone or iPad. In fact, the video is already being rendered to a 3D texture on the iPad; the video “rectangle” smoothly rotates and resizes in an animation, while video is still playing, when you rotate the iPad. That uses far more power.
Seven years ago, in year 2003, I had a Toshiba portable DVD player with 1024×600 resolution, and it had high quality upconversion.
June 21st, 2010 at 4:27 am
low quality downscalign can be done without power soending at all.
You just drop some ines/columns without putting them to screen and here we go.
High quality, like those Lanzos filters in Photoshop, but in 4D, would take a lot of computations, either with specific transistors, or with generic DSP. If you have to do calculations, then you do have it.
I do not doubt that downscaling is possible, it is high-q downscaling that is problematic.
iPad example is nice
It uses 1000 MHz Cortex-A8 CPU, with graphic DSP. I wish to believe this PMP has the same CPU and only 30% of iPad’s price 
))
upconversion is easier than downconversion. 480p DVD has much less data to be worked over, than 720p. Much less details, that you have to put care about.