TiVo Community Forum Archive 1
READ ONLY ARCHIVES

Welcome to the TiVo Community Forum Archive
This archive covers threads on TiVo Community Forum that have not been posted to from the start until June 30, 2004.  Any thread that has a post made to it between 7/1/04 and 12/31/05, that had not been posted to, will be found in Archive 2.
This is a READ ONLY site.

  Search | ARCHIVE 2 | MAIN SITE

TiVo Community Forum Archive 1 : Powered by vBulletin version 2.2.8 TiVo Community Forum Archive 1 > Main TiVo Forums > DIRECTV Receiver with TiVo
>>> "Easing the Signal Squeeze for Satellite TV" - NY Times <<<

 
Forum Jump:
Search this Thread:
Last Thread   Next Thread
Author
Thread ---> Show Printable Version | Email this Page | Subscribe to this thread Post New Thread    Post A Reply
Dreimiller is offline Old Post 10-04-2001 10:53 PM
Click Here to See the Profile for Dreimiller Visit Dreimiller's homepage! Find more posts by Dreimiller Add Dreimiller to your buddy list Show Printable Version Edit/Delete Message Reply w/Quote
Dreimiller
Member

Registered: Jun 2001
Location: Gales Ferry, CT
Posts: 3

Post "Easing the Signal Squeeze for Satellite TV" - NY Times

Positive news about DirecTV's picture quality and it's improvement in the near future:

Easing the Signal Squeeze for Satellite TV

------------------
-McD-

POST #1 | Report this post to a moderator | IP: Logged

perilous is offline Old Post 10-05-2001 12:09 AM
Click Here to See the Profile for perilous Find more posts by perilous Add perilous to your buddy list Show Printable Version Edit/Delete Message Reply w/Quote
perilous
Member

Registered: Apr 2001
Location: Robbinsville, NJ USA
Posts: 72

Smile

Your link requires a sign-in, etc. that I am not interested in doing. Could you summarize what the article said? Thanks...

POST #2 | Report this post to a moderator | IP: Logged

walters is offline Old Post 10-05-2001 12:20 AM
Click Here to See the Profile for walters Find more posts by walters Add walters to your buddy list Show Printable Version Edit/Delete Message Reply w/Quote
walters
TiVo Forum Special Member

Registered: Dec 2000
Location:
Posts: 2408

Post

http://www.avsforum.com/ubbtivo/Forum5/HTML/005631.html

------------------
Philips DSR6000 DirecTV with <FONT COLOR="#ff3333">T</FONT c><FONT COLOR="#33cc99">i</FONT c><FONT COLOR="#ff9900">V</FONT c><FONT COLOR="#9933ff">o</FONT c>
Vote for new TiVo features

POST #3 | Report this post to a moderator | IP: Logged

Otto is offline Old Post 10-05-2001 01:09 AM
Click Here to See the Profile for Otto Find more posts by Otto Add Otto to your buddy list Show Printable Version Edit/Delete Message Reply w/Quote
Otto

Registered: Mar 2000
Location:
Posts: 1031

Post

Try this link instead.. No reg needed.
http://archives.nytimes.com/2001/10...its/04BEAM.html


------------------
<FONT size="1">All comments made in this post are my opinion and my opinion alone. Deal with it.
Otto, Zen TiVo Master - Moderator - AVS Tivo Forums - Tivo Underground, Tivo Coffee House
"The way of the portable computer user is as a stony path strewn with plugs and sockets, all the wrong size..." -- Terry Pratchett</FONT s>

POST #4 | Report this post to a moderator | IP: Logged

Hoffer is offline Old Post 10-05-2001 01:51 AM
Click Here to See the Profile for Hoffer Find more posts by Hoffer Add Hoffer to your buddy list Show Printable Version Edit/Delete Message Reply w/Quote
Hoffer
Hey Now!!!

Registered: Jun 2001
Location: Twin Cities, MN
Posts: 3397

Post

With the use of less compression, will this dramatically affect the number of hours we can record on our TiVo?

They need to send more data in order to get a better picture. More data means more megabytes to record the same show. More megabytes means less capacity for our TiVos.

I'm all for better quality picture. Especially since my TiVo's space is upgraded. Just thought I'd throw this out there for the masses to chew on.

I'm really looking forward to the new year!!

------------------
Sony 108 Hour DirecTiVo
Philips 92 Hour TiVo

POST #5 | Report this post to a moderator | IP: Logged

Intrepid-NY is offline Old Post 10-05-2001 07:41 AM
Click Here to See the Profile for Intrepid-NY Find more posts by Intrepid-NY Add Intrepid-NY to your buddy list Show Printable Version Edit/Delete Message Reply w/Quote
Intrepid-NY
Senior Member

Registered: Jul 2000
Location: Long Island, NY
Posts: 31

Post

GREAT NEWS! I'm one of those who can see the compression now.

Here is the full story:

Easing the Signal Squeeze for Satellite TV
By ERIC A. TAUB
Copyright 2001 The New York Times Company

ONE of satellite television's oft-heard selling points has been the quality of its digital pictures and sound. But some direct-broadcast satellite subscribers have found that "digital" cannot necessarily be equated with "good."

The country's two direct-broadcast satellite television services, DirecTV and Dish Network, can offer hundreds of channels by digitally compressing their signals, squeezing out extraneous, redundant information. In addition to nationwide channels like HBO and CNN, the satellite services are now offering local broadcast channels in more markets. But the more channels that are offered, the less bandwidth is available for each. Squeeze out too much data, and the signal loses its quality.

"My local channels on DirecTV definitely look softer than the regular networks," said Bob Pitchnick, a business owner in Croydon, Pa. "Football and basketball look the worst." Mike Kopriva, a computer engineer in San Jose, Calif., said: "On DirecTV's Sunday Ticket football games, the ball often disappears along with the fans into a mass of pixels. Soft and muddy is the best way to describe it."

DirecTV, the larger of the two companies, says that its picture quality will soon improve. "To accommodate the many local channels we now offer, we've pushed the limit on bandwidth," said the company's executive vice president, David Baylor. With the imminent launching of a new satellite designed to carry local channels, more space will become available. "You'll see an improvement in DirecTV picture quality by the beginning of 2002," Mr. Baylor said.

Both DirecTV and Dish Network are loath to discuss how they compress their signals or how much compression they apply. Still, the principles governing digital video compression are widely known.

An uncompressed studio-quality standard-definition video image requires 216 million bits per second to be transmitted. By compressing the signal, its bit rate can be reduced from 216 to approximately 6 megabits, allowing five channels to broadcast from one satellite transponder, which can handle 30 megabits of data per second. Each satellite has multiple transponders.

Several compression techniques are used. So-called "loss less" compression assumes that if one of the screen's approximately 300,000 pixels (or picture elements) is a particular color, the odds are the neighboring one will be the same color (if every pixel were a different color, only electronic snow would appear on the screen). So rather than transmitting data that fully describes the color of the neighboring pixel, only instructions designating the difference in color between the two is sent. An instruction describing the difference requires fewer bits than data describing the actual color. This technique recovers the least amount of bandwidth.

A more useful kind of compression, called lossy, eliminates certain picture information that the eye cannot see. For example, edges between black and white surfaces look sharper to the brain than those between green and purple, so the green and purple edges can be safely blurred by eliminating some of the data. Blur the edges too much, or sit too close to the screen, and the lack of detail becomes obvious.

When an object moves in space, data indicating the change in position must be transmitted. Pictures with static imagery, like news shows, require less bandwidth because the television receiver can be instructed to create much of the same image — the background behind the news reader, for example — over a succession of frames. Once the scene changes, many more bits are required to describe the new image. If those bits aren't available because the picture has been granted only a small chunk of bandwidth, the first few frames of the transition will look blotchy.

The worst thing to compress is sports and, particularly, soccer, said Andy Lippman, a senior research scientist at the Massachusetts Institute of Technology and a developer of the MPEG 2 compression standard, which is used by direct-broadcast satellite services. "Men are running quickly and suddenly across a field, and constantly changing directions," requiring more bandwidth to describe those changes.

Channels within one transponder can also "borrow" bits from another channel that does not need them. Called "statistical multiplexing," a sports program can use bandwidth not used by a static talking-heads show on that transponder.

If all the channels within a transponder have a lot of high-bandwidth action, there are no bits to borrow. "If you're running out of bits, the best thing to do is to soften the image before compression, so that fewer bits are needed," Dr. Lippman said. "That's what often happens to sports programming." This results in customer complaints — at least until the beginning of next year.


------------------
Sony Direc<FONT COLOR="red">T</FONT c><FONT COLOR="green">i</FONT c><FONT COLOR="orange">V</FONT c><FONT COLOR="purple">o</FONT c><FONT COLOR="black"> 116 Hours / 2.5-01</FONT c>

POST #6 | Report this post to a moderator | IP: Logged

TWPaulus is offline Old Post 10-05-2001 11:54 AM
Click Here to See the Profile for TWPaulus Find more posts by TWPaulus Add TWPaulus to your buddy list Show Printable Version Edit/Delete Message Reply w/Quote
TWPaulus
TiVo Forum Special Member

Registered: May 1999
Location: San Jose, CA USA
Posts: 2

Post

Sound good. But which do you think will happen better video quality or add more channel to use the extra space. I think it will be both. Some improvement and more channels (channel mean more money)

------------------
Tom Paulus
a TV nut that's hard to crack.
ISPChoce the smiles=http://www.isp-choice.com/smilies/smilies.htm

POST #7 | Report this post to a moderator | IP: Logged

drewba is offline Old Post 10-05-2001 01:32 PM
Click Here to See the Profile for drewba Find more posts by drewba Add drewba to your buddy list Show Printable Version Edit/Delete Message Reply w/Quote
drewba
Member

Registered: Nov 2000
Location: Renton, WA
Posts: 161

Post

quote:
Originally posted by TWPaulus:
Sound good. But which do you think will happen better video quality or add more channel to use the extra space. I think it will be both. Some improvement and more channels (channel mean more money)




While I'd like to say all better quality, I agree with you that it will be both. If there is a noticable improvement to the local channel PQ, I will be satisfied.

POST #8 | Report this post to a moderator | IP: Logged

All times are GMT. The time now is 04:55 PM. Post New Thread    Post A Reply
  Last Thread   Next Thread
>>> "Easing the Signal Squeeze for Satellite TV" - NY Times <<<

TiVo Community Forum Archive 1 : Powered by vBulletin version 2.2.8 TiVo Community Forum Archive 1 > Main TiVo Forums > DIRECTV Receiver with TiVo
Search The Internet
 
Show Printable Version | Email this Page | Subscribe to this thread

Forum Jump:
 
Search this Thread:

Forum Rules:
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is OFF
vB code is ON
Smilies are ON
[IMG] code is ON
 

< Contact Us - TiVo Community Forum Archive 1 >

Powered by: vBulletin Version 2.2.8
Copyright ©2000, 2001, Jelsoft Enterprises Limited.
(C)opyright - All Rights Reserved. No information may be posted elsewhere without written permission.
TiVo® is a registered trademark of TiVo Inc. This site is not affiliated with TiVo Inc.
Page generated in 0.03666711 seconds (87.76% PHP - 12.24% MySQL) with 20 queries.


Spider History Index