Comments on: Teclast C700 7-inch portable media player

By: mlb hats wholesale

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By: Arioch

Arioch — Mon, 21 Jun 2010 11:27:37 +0000

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.

By: Garth Douglas

Garth Douglas — Sat, 19 Jun 2010 04:03:59 +0000

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.

By: Arioch

Arioch — Mon, 14 Jun 2010 20:20:57 +0000

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