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Charlotte, NC - OTA - Page 198

post #5911 of 7653
WJZL seems to be starting HD at the first of next week by dropping THIS.........I hope this is a painless transition .
post #5912 of 7653
Channel 46.3 THIS is moving 55.2 June 23.
post #5913 of 7653
For those who are interested..WCCB is now available via Syncbak..if your are in the DMA (key phrase here..IN THE DMA)..you can view our newscasts and select other programs Live or On-Demand on your Android, iOS, or Kindle Fire HD device. Note that we are still tweaking the encode parameters so quality may vary at times.

For more information see: http://www.syncbak.com/
post #5914 of 7653
Quote:
Originally Posted by realoldman View Post

Channel 46.3 THIS is moving 55.2 June 23.
Speculation is they will add the Movies! network on 46.3 to replace This TV.
post #5915 of 7653
Quote:
Originally Posted by tylerSC View Post

Speculation is they will add the Movies! network on 46.3 to replace This TV.

We'll see what happens. The arithmetic suggests they will have to drop another service, or, both current subs, to have an HD service and Fox Movies.
post #5916 of 7653
Isn't 46-1 already in HD?

- Trip
post #5917 of 7653
Quote:
Originally Posted by Trip in VA View Post

Isn't 46-1 already in HD?

- Trip
There are 4 programs on that station currently. Whatever 46.1 is, its questionable as to being HD.I realize it is accused of being 750p
post #5918 of 7653
Quote:
Originally Posted by difuse View Post

There are 4 programs on that station currently. Whatever 46.1 is, its questionable as to being HD.I realize it is accused of being 750p

WJZY-HD, 46-1 (Program 3) is 720p.....at around 9 mb/s..and 2.2 mb/s for the other three. With MH in there too.
Edited by bdfox18doe - 6/18/13 at 2:22pm
post #5919 of 7653
Quote:
Originally Posted by bdfox18doe View Post

WJZY-HD, 46-1 (Program 3) is 720p.....at around 9 mb/s..and 2.2 mb/s for the other three. With MH in there too.
Yes. I seem to have a thing for typing 750 instead of 720. All 4 look OK, but they don't normally have to resolve really fast motion.
As I wrote, we'll see.
post #5920 of 7653
They'll be on the splicer when they go to FOX, which stat-muxes and gives priority to the HD stream (which is encoded @ TOC in LA with high efficiency multipass encoders) ..after setting aside the reserve for MH that is.
post #5921 of 7653
I remember reading where WJZY installed a very good multiplexing system from Harris when they added the additional subchannels. 46.1 used to be 1080i but was changed to 720p. Hopefully when FOX takes over, things will still look good.
post #5922 of 7653
Wonder why no one is picking up COZI TV with all the changes go on? I like there lineup.
post #5923 of 7653
I think FOX is normally broadcast in 720p. I just had a quick look at the Movies! wiki page, and it looks like many of their affiliates have one HD primary channel and one other SD subchannel along with it (three in all). I'd be surprised if they dropped Antenna TV because it's one of the top subnetworks. I wouldn't be surprised if they cut ZUUS on 46.4 or really choked down its bit rate, if that's possible.

My tuner recently added UNC TV on channel 58, but the signal is only occasionally strong enough for me to get a picture.
post #5924 of 7653
Yea FOX and ABC are 720p. CBS and NBC are 1080i. The UNC-TV 58 signal may not be as strong as the other Clt signals. I believe they are near Harrisburg.
post #5925 of 7653
Quote:
Originally Posted by realoldman View Post

Wonder why no one is picking up COZI TV with all the changes go on? I like there lineup.
I would like to see that channel as well. I believe it is syndicated by NBC.
post #5926 of 7653
On the available bandwidth WJZY vs HD picture, I think they do a pretty good job managing it with 3 subchannels. They can do it, in part because they are only sending a 640x480 picture on 46.4, 46.3 & 46.2. It's noticeably smaller than say, what you see on MeTV 18.3 which is 720x480 and the more typical 704x480 on the rest of the Charlotte channels.

IMO, they could drop 46.4 for more bandwidth if they need it. I only noticed this morning that it has apparently changed from "The Country Network, TCN" to "ZUUS Country". (maybe the same network with a new name)
post #5927 of 7653
An excellent explanation there blackcat.

Now, not to add to some of the uniformed speculation that is offered here by others, based on working closely with the FOX lab on the splicer since day one, here is what I suspect you will see:

In the past FOX engineering has believed that ATSC using high efficiency encoders can support 720p with a maximum of 2 SD subchannels and maintain acceptable quality. The network satellite feeds are originated @ TOC in LA using some of the best encoders available, and are on the bird at about 18 mb/s.
If the local affiliate has no subchannels, then the video and audio elementary streams are "spliced" (think film as a rough analogy) into the local signal with local PSIP without any modification.
IF the local has subchannels, the splicer re-quantizes the network feed to fit the data rate needed by the local affiliate. Based on the math and processing power of the splicer, this is limited to a lowest rate of about 12 mb/s or so without introducing considerable artifacts in the HD signal. In the past FOX
has been resistant to do this. At times, in network programming such as House and Bones, I have seen the rate around 9 mb or so..but this is from the encoders in LA, and not altered locally so the quality is excellent. The splicer also gives priority to the network HD and will pull bits from the local subchannels
"if" if feels necessary to maintain network quality in times of high demand programming such as Nascar. This is why MeTv has looked a bit rough during some network periods.

So, when watching a network program, you are seeing the encoders in LA and not the local encoder. When a local break or program is airing, the network feed is spliced out and you are seeing the local encoder. There is no local HD output from FOX here, master control actually switches from an analog proxy.

The "splicer" is a highly modified Cisco DCM, with the 4 receivers and FOX News server takes up a full rack. Time Warner here uses the same basic Cisco DCM for its channels.
post #5928 of 7653
When the musical chairs end and the dust finally settles, I wonder what will become of the (IMO) most useless sub-channel in town, WCCB 18.2. I've read some explanations for its existence, but I still don't get it.
post #5929 of 7653
In reality..there is no 18.2 subchannel. It's created with existing elementary streams already present by telling your receiver to create it via PSIP commands.. which takes virtually no bandwidth.. And at this point in time, there will be no change with it. smile.gif It's just not on my horizon. wink.gif
You can delete it from your channel memory if you like. cool.gif
post #5930 of 7653
Quote:
Originally Posted by bdfox18doe View Post

An excellent explanation there blackcat.

Now, not to add to some of the uniformed speculation that is offered here by others, based on working closely with the FOX lab on the splicer since day one, here is what I suspect you will see:

In the past FOX engineering has believed that ATSC using high efficiency encoders can support 720p with a maximum of 2 SD subchannels and maintain acceptable quality. The network satellite feeds are originated @ TOC in LA using some of the best encoders available, and are on the bird at about 18 mb/s.
If the local affiliate has no subchannels, then the video and audio elementary streams are "spliced" (think film as a rough analogy) into the local signal with local PSIP without any modification.
IF the local has subchannels, the splicer re-quantizes the network feed to fit the data rate needed by the local affiliate. Based on the math and processing power of the splicer, this is limited to a lowest rate of about 12 mb/s or so without introducing considerable artifacts in the HD signal. In the past FOX
has been resistant to do this. At times, in network programming such as House and Bones, I have seen the rate around 9 mb or so..but this is from the encoders in LA, and not altered locally so the quality is excellent. The splicer also gives priority to the network HD and will pull bits from the local subchannels
"if" if feels necessary to maintain network quality in times of high demand programming such as Nascar. This is why MeTv has looked a bit rough during some network periods.

So, when watching a network program, you are seeing the encoders in LA and not the local encoder. When a local break or program is airing, the network feed is spliced out and you are seeing the local encoder. There is no local HD output from FOX here, master control actually switches from an analog proxy.

The "splicer" is a highly modified Cisco DCM, with the 4 receivers and FOX News server takes up a full rack. Time Warner here uses the same basic Cisco DCM for its channels.

Over time, I've read a bit of complaining from viewers watching live sports , the complaints generally concerning stations with more than one subchannel.. The arithmetic suggests to me that WJZY will not be able to support more than 2 subchannels without a noticeable "bit starving" of one or more programs. That because live sports will become an issue.

As always, thanks for the information, Bob.. I 'believe WJZY cannot juggle more than a real HD and two SD programs, but I am interested to see what comes.
post #5931 of 7653
Perhaps they will drop the country music channel and add Movies to 46.3. Just speculation until we see what they do. But I thought it was a given that all FOX O&O stations will carry Movies network.
post #5932 of 7653
With WCCB changing to CW, I wonder if they will change from 720p to 1080i. I believe most CW stations are 1080i, and 46.1 was originally before changing to 720 when they added the subchannels.
post #5933 of 7653
I notice on the schedule listings for July 1 + it does show the networking change for 18 & 46. It doesn't show any changes for THIS or anything else so far. It does show News 46 @ 10pm.
post #5934 of 7653
The CW plus service, airing in markets 100 and up (my wbmm) is a 720p feed
post #5935 of 7653
Quote:
Originally Posted by bdfox18doe View Post

The CW plus service, airing in markets 100 and up (my wbmm) is a 720p feed
I thought it was 1080i so I stand corrected. But I believe WYCW Channel 62 locally broadcasts 1080i.
post #5936 of 7653
Quote:
Originally Posted by tylerSC View Post

I thought it was 1080i so I stand corrected. But I believe WYCW Channel 62 locally broadcasts 1080i.

Yes it is.
post #5937 of 7653
CW provides two different network feeds, one in 1080i for larger markets and one in 720p for smaller markets. There are also a number of larger markets where CW runs in 720p due to bandwidth issues or compatibility reasons with sister stations.

- Trip
post #5938 of 7653
Quote:
Originally Posted by Trip in VA View Post

CW provides two different network feeds, one in 1080i for larger markets and one in 720p for smaller markets. - Trip

Yes, and for various good reasons..CW will not allow the +100 feed feed to be used outside of +100's..even for backup.
post #5939 of 7653
What does +100 mean?
post #5940 of 7653
Quote:
Originally Posted by blackcat6 View Post

What does +100 mean?

Quote:
Originally Posted by bdfox18doe View Post

The CW plus service, airing in markets 100 and up (my wbmm) is a 720p feed
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