[mythtv-users] Hauppauge HD PVR (A bit more info for those starved for it)

Michael T. Dean mtdean at thirdcontact.com
Fri Feb 29 20:17:01 UTC 2008


On 02/29/2008 01:24 PM, Matt S. wrote:
> On Fri, Feb 29, 2008 at 1:18 AM, Michael T. Dean wrote:
>   
>> On 02/28/2008 04:18 PM, Yeechang Lee wrote:
>>     
>>> Agreed. A 9Mbps PBS 1080i stream (4GB/hour) is surely simpler to
>>> process than a 19.2Mbps 1080i stream (7.5-8GB/hour), however. Despite
>>> the stated 25Mbps limit of the hardware encoder, I certainly look
>>> forward to future examples at higher bitrates.
>>>       
>> I look forward to the day when more broadcasters actually use higher
>> bitrates...  Here, only CW and NBC use such a high bitrate.
> Doesn't CBS broadcast in 1080i too?  I thought only Fox and ABC used 720p?

Yep.  Around here, CBS, MyTV, and PBS all do 1080i, but at a bitrate 
closer to 15 Mbps (around 6.5 GiB/hr).  There are noticeable low-bitrate 
effects (such as blockiness) in some parts of shows (especially in 
fast-moving scenes).  Note that some of these could even be fixed at the 
selected bitrate using a better (= more time-consuming = more expensive) 
encoding process.  By using a higher bitrate, some of these encoding 
defects can be eliminated without modifying the encoding process.

Fox and ABC are both doing 720p, but (here, at least) use about 10Mbps 
(about 4 GiB/hr).

Mike


More information about the mythtv-users mailing list