From what I have seen, comparing a Kinoma video to a Divx video is not fair at all. Kinoma appears to be using Cinepak Mobile for its compression. It is much ligher weight than any of the mpeg (1 included) standards and the full set of the codec has been around since Windows 3.1. There is nothing wrong with Cinepak, and it was a great choice for the 68k POS devices. Until you have a Divx player or comparable mpeg-4 player on PalmOS 5 device (or a Kinoma video player on the PPC), these FPS numbers ARE NOT COMPARABLE! I am also leaving out the bit that your also way above the LCD refresh on most devices, but this is the sake of pure numbers.
For the record, I get about 28-30fps on a 30fps 320x240 Divx 5 at 192kbps(one pass) with 56kbs mp3 audio on a 400mhz Axim. My Framerate is solid at 30 or 24 if I feel like doing a two pass encode.
Now when someone says they are getting 160fps on a Divx playback on thier Plam, I will be very impressed and may trade in my desktop for a Palm at that point
Regarding fluid motion in humans. The trick is keeping an even spacing and not skipping frames. 15fps can pass as motion to most people, however 24 is much better. After about 60fps, the fluidness of motion is harder to percive.
why do sony clie's play mpegs like no other? I saw a 560kbps 480x320 mpg clip on the nx70v and although there was no FPS meter... you could tell that thing was smooth. yes, it has audio
I do know about the DSP chip, which handles must of the decoding, and my question is, why don't PPC oems include DSP chips? some say it's not needed, but playing mp3s still do slow down my ppc sometiems. I mainly play games while listening to mp3s and the mp3 does slow it down... if it had a DSP to handle it, it'd be pretty nice. oh well.
anyway about palm, yes, it plays Cinepek files very well, but the thing is it is VERY easy to decode cinepek, and file sizes are HUGE. Divx is much smaller and much harder to decode....
Zire 71 is using Kinoma, which uses Cinepak Codec, while most PPC fps are stated using .mpeg codec.
From what I know, decoding a Cinepak video is a simpler process than decoding an MPEG video. That's why even the 66 MHz Dragonballs can handle it. There is a tradeoff, though: Cinepak is inferior to MPEG in terms of image quality and compression ratio.
why do sony clie's play mpegs like no other? I saw a 560kbps 480x320 mpg clip on the nx70v and although there was no FPS meter... you could tell that thing was smooth. yes, it has audio
I do know about the DSP chip, which handles must of the decoding, and my question is, why don't PPC oems include DSP chips? some say it's not needed, but playing mp3s still do slow down my ppc sometiems. I mainly play games while listening to mp3s and the mp3 does slow it down... if it had a DSP to handle it, it'd be pretty nice. oh well.
Remember POS has a lot less overhead. Also the jump from 320x240 -> 480x320 is fairly large for an mpeg-1. The higher bitrate was needed to keep it comparable in quality to a ~350kbps 320x240 mpeg-1. BTW, I have never had any video become very jerky on my PPC, unless it was being streamed.
And speaking of the DSP's, that is one of the biggest sore spots I have with POS devices right now. Sony will not release thier sound api for the NX or NZ. Becuase of that, there are apps that can play sound on a Palm POS5 device but not a Sony POS5 device. Also Sony has used different DSP's over time and they do not have all of the same capalbilties. Back when you only had a 33mhz 68k class CPU, that DSP was needed. With 144mhz,200mhz, and 400mhz ARM Class CPUs, it is not needed. Also if you have a DSP, you might be limiting it to one class of compression standards, MP3/ACC/Whatever Sony's one is. Becuase you are on a low power and low memory bandwitdh device, you start to elimiate using programable DSP's such as the EMU10k series used in the SBLive (Creative never made use of those DSPs well but they are a good example). For one I use OGG's for my music, and that was an issue when I was looking at getting a NX60 over an Axim.
If PPC's had DSP's, it would be a pain in the ass (Would early e740 users trying to watch Divx's be a good example?). That means the mp3 player you are using must support that DSP or else it will fall back on the CPU and you would gain nothing. You would be lucky to get MS to include support for that DSP in WMP. Overall, adding adhoc standards is not a road one wants to go down (see the issues with 802.11g that are related due to a non-final standard and people interpeting the current draft differently). Take a look at POS development one day. Yes POS may be easier to code for, but you have adhoc standards (thanks Sony) that you might need to code for too. At least Sony is prevailent enough in POS that the stuff they did is more or less a standard now.
Sorry, but I can't get all jazzed up about reported specs. I prefer firsthand tests. As long as I can get outstanding quality via ultralow bitrate wmv (87K video, 16K audio, 15fps, 40MB per hour of Video) I'm a happy camper.
The following are raw screencaps take from my Audiovox Maestro....
armchair exercises... tilt your head to the right...and...2...and... 3...
Maybe someone should post images rotated the otherway for symmetry.
Otherwise we'll be able to spot the people who follow this thread by the bulging neck muscles on their left side only. :lol:
Linear Mode
