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MPEG4 Questions

rickbbb
10-10-2005, 11:46 AM
What IS MPEG4? Is it a sharper picture than high definition or does it give you more of a better high definition picture?
Can the 811 receiver be upgraded with software added to it to become MPEG4?
I read on these forums that Dish Network AND Directv are coming out with a receiver that is specifically made for MPEG4 soon.Directv will supposedly have their receiver out before Dish Network does.

jergenf
10-10-2005, 12:54 PM
What IS MPEG4? Is it a sharper picture than high definition or does it give you more of a better high definition picture?.
MPEG4 is a newer compression method compared to MPEG2. The resolution will be the same but mpeg4 produces better motion and should have less pixelation during high action scenes. It will be able to compress data by 2+ times over mpeg2. This means it will take about half the bandwidth or half the disk space for DVR owners compared to mpeg2. The actual name for this new compression is H.264 which is MPEG4 Type 10 or simply MPEG4 AVC because in reality MPEG4 can be used to compress many types of data format (so H.264 is only the video codec).

Can the 811 receiver be upgraded with software added to it to become MPEG4?
It requires a new decoder chip therefore a new receiver is required. In order to uncompress mpeg4 via software would require a CPU of extreme speeds perhaps 3-4Ghz for real time decompression. It's much cheaper (perhaps $35) to use a special chip for hardware decoding then make a receiver for $3000.

The replacement receiver for the 811 will be the 411.

jergenf
10-10-2005, 01:27 PM
Additional info on MPEG formats:


MPEG1 Easy to compress and uncompress.
Produces low quality video used for internet streaming video.
MPEG2 Difficult to compress easy to uncompress.
Used for SD/HD digital OTA and satellite broadcasts and DVDs.
MPEG4 Very difficult to compress and complicated to uncompress.
Used for HD-DVD/BluRay Dics and satellite broadcasts.

Formats are downward compatable meaning mpeg4 can
also decode mpeg2, etc.

RSawdey
10-10-2005, 04:22 PM
MPEG4 is a newer compression method compared to MPEG2. The resolution will be the same but mpeg4 produces better motion and should have less pixelation during high action scenes. It will be able to compress data by 2+ times over mpeg2. This means it will take about half the bandwidth or half the disk space for DVR owners compared to mpeg2. The actual name for this new compression is H.264 which is MPEG4 Type 10 or simply MPEG4 AVC because in reality MPEG4 can be used to compress many types of data format (so H.264 is only the video codec).


H.264 is the ITU (International Telecommunications Union) name for MPEG4 part 10, which it adopted as it's own standard. MPEG is the Motion Picture Experts Group.

MPEG4 is about 2x as efficient as MPEG2 in compression, but if you expect better quality then it will require the SAME bandwidth. If it is used to halve the bandwidth, there will be no quality improvement. It's one or the other, or compromising both... but NOT twice the quality in half the bandwidth.

rickbbb
10-10-2005, 06:36 PM
So it's no problem if i stay with my 811 receiver instead of changing to a MPEG4 receiver.Picture quality will be the same,right?

I was talking to a man in the Advance tech department at Dish Network and he said that all their new receivers will have a dvr built into them.
Does that include the MPEG4 receiver that will be coming out?

jergenf
10-11-2005, 06:37 AM
So it's no problem if i stay with my 811 receiver instead of changing to a MPEG4 receiver.Picture quality will be the same,right?
If the channels you have now or desire in the future are encoded in mpeg4 then you will need a new receiver. You would have little choice in this matter. Yes the quality will remain the same.

I was talking to a man in the Advance tech department at Dish Network and he said that all their new receivers will have a dvr built into them.
Does that include the MPEG4 receiver that will be coming out?
The 411 will be a direct replacement for the 811 (no DVR)
The 962 will replace the 942. Not all new receivers will have DVRs but I'm fairly certain that all future receivers will be mpeg4 capable.
November 14th on tech forum (chan 101) they are suppose to release information about future mpeg4 receivers and the 129 satellite.

kokomo
10-12-2005, 11:24 AM
Found this interesting article about MPEG4.
http://www.nextcomwireless.com/r5000/mpeg4.htm

Also received this response from dish:
At this time there has not been any information released on the change to MPEG4 so I would not be able to provide any details on how this will affect the current equipment. However as I have seen in the past with changes DISH Network will more than likely have a solution for this. There should be more information on this change over the next few months.

Natalie Winters

Customer Resolution Specialist

Executive Office of Dish Network

Email [email protected]

jergenf
10-12-2005, 03:23 PM
We all know that future Dishnetwork HD locals will be encoded in mpeg4. But will the price for locals in HD be the same as the analog based LiLs are now?

Maybe this should be a separate thread...?? :confused:

numbskully
10-12-2005, 04:04 PM
MPEG 4 testing has began at the 129 slot and it appears to be major LA networks. ;)

jergenf
10-19-2005, 08:06 AM
If it is used to halve the bandwidth, there will be no quality improvement. It's one or the other, or compromising both... but NOT twice the quality in half the bandwidth.
Just for clarification I didn't state the quality would be better than mpeg2 I said it would be the same. The only added advantage mpeg4 offers is better performance for analyzing frame movement so it should (in theory) produce less pixelation during extended fast motion sequences. This has been a weakness with mpeg2 when compressing HD within the limited broadcast bandwidth of 19.4 Mbits/sec.


The resolution will be the same but mpeg4 produces better motion and should have less pixelation during high action scenes.