Fwd: Re[2]: [linux-dvb] Re: hdtv scanning

david may david.may10 at ntlworld.com
Mon Nov 6 17:42:54 CET 2006


This is a forwarded message
From: david may <david.may10 at ntlworld.com>
To: Manu Abraham <abraham.manu at gmail.com>
Date: Monday, November 6, 2006, 4:40:57 PM
Subject: [linux-dvb] Re: hdtv scanning

===8<==============Original message text===============
Hello Manu,

Monday, November 6, 2006, 12:52:44 PM, you wrote:

> Klaus Schmidinger wrote:
>> Benny Amorsen wrote:
>>>>>>>> "KS" == Klaus Schmidinger <Klaus.Schmidinger at cadsoft.de> writes:
>>> KS> The whole HDTV thing is of no interest to me until there is a DVB
>>> KS> card that can actually replay HDTV in hardware.
>>>
>>> Why would it have to be the DVB card doing it? That seems to be the
>>> job of the graphics card and the CPU.
>> 
>> Well, call me old-fashioned, but I believe that for normal
>> live tv viewing a DVB card should be able to do the job
>> entirely on its own. VDR just tells it which channel to tune
>> to and that's it. It's this "take some old PC, put in a DVB card
>> and have a digital video recorder" thing ;-).
>> 

> Currently H.264 decoding in software is a large overhead in the short
> term (for high bit rate HD streams), but wouldn't be the same in the
> long run, considering the increase in the number of CPU cores. In the
> long run there wouldn't be many cards doing hardware decoding.

> Even if DVB HD FF card were there, would be a bit too expensive as well.


> Manu

the addition of a simple cheap and low power current re-programable chip such as the KiloCore FPGA
might have been a very good thing to add for the future expansion/cards rather than some
'specialized chips (called DSPs)' but thats perhaps OT so ill just mention it in passing interest.

http://www.rapportincorporated.com/
http://www.rapportincorporated.com/kilocore/kc256.html
"Rapport?s initial chip, the KC256, includes 256 processing elements in a 16x16 array,
with a peak of 25 Giga Byte Operations per second (GBops) at 100 MHz while using less than 500 mW.
For even higher performance, multiple KC256 chips can be clustered.

The KC256High performance at low power consumption makes Kilocore? ideal for demanding
applications like advanced security. A KC256 runs the IDEA digital security decryption
algorithm 10 times faster than an ARM7®. And the ARM7 consumes 4 times the power
(120 mW vs. 500 mW), giving the KC256 a 40x power/performance advantage. Compared to
a 1.8 GHz Pentium, the KC256 offers a 500x power/performance advantage. "

http://en.wikipedia.org/wiki/Kilocore
"Kilocore, from Rapport Inc. and IBM, is a high-performance, low-power multicore processor,
with 1025 cores. It contains a single PowerPC processing core, and 1024 8-bit Processing Elements
running at 125 MHz each, which can be dynamically reconfigured, connected by a shared interconnect.
 It allows high performance parallel processing."

 now while the kiloCore about is marketed for so called hand held
 (DVB-h(2) type products, theres no reason why they and the larger
 units couldn't also be used for higher res video etc, it just takes
 the hardware people here and elsewhere to put them in as standard in
 all the prototype boards.
-- 
Best regards,
 david                            mailto:david.may10 at ntlworld.com

===8<===========End of original message text===========



-- 
Best regards,
 david                            mailto:david.may10 at ntlworld.com
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