ATSC Program and System Information Protocol (PSIP). The ATSC Program and System Information Protocol (PSIP) is specified in standards document A/ Once you buy an HDTV it doesn’t take long before you get confused by all the acronyms. We love us some HD, but the days of simply bringing. information in the ATSC PSIP standard, system information and program information. System information allows navi- gation and access to the channels within.

Author: Malabei Kazrat
Country: Armenia
Language: English (Spanish)
Genre: Spiritual
Published (Last): 12 November 2009
Pages: 410
PDF File Size: 1.99 Mb
ePub File Size: 8.44 Mb
ISBN: 894-4-86585-916-2
Downloads: 63455
Price: Free* [*Free Regsitration Required]
Uploader: Samugis

HD What is ATSC, PSIP, QAM, and 8-VSB?

Television stations work the same way, but the frequencies are mapped to channel numbers to make things simple — so for example, pxip 8 in the US is at Retrieved 24 March The Program and System Information Protocol PSIP is the MPEG a video and audio industry group and privately defined program-specific information originally defined by General Instrument for the DigiCipher 2 atsd and later extended for the ATSC digital television system for carrying metadata about each channel in the broadcast MPEG transport stream of a television station and for publishing information about television programs so that viewers wtsc select what to watch by title and description.

Ppsip easiest example to understand is FM Radio. Two revisions largely backwards-compatible with the standard have been made. Originally, broadband just meant more than one frequency was used to send a signal over the same medium — as apposed to baseband which only uses one frequency. PSIP Pro has the capability to import information about the audio and video services directly from the encoding system and insert them automatically into PSIP tables.

QAM This is a term thrown around a lot these days because it’s actually pretty useful to understand. Archived from the original on 25 July Recently operators have been giving out a ” tuning adapter ” which enables one-way CableCARD host devices to work with SDV, but this is all pretty new and Microsoft has yet to even support it — although we fully expect support in Windows 7.

  AN ALARM TO UNCONVERTED SINNERS PDF

This isn’t really a problem when you take two QAM Modulator With the advent of HD bandwidth has become a problem for all content providers, but it helps if you understand how it is managed.

This article includes a list of referencesrelated reading or external linksbut its sources remain unclear because it lacks inline citations. The theory is that none of the streams will need all the bandwidth at the same time. PSIP is a atdc of tables designed to operate within every digital broadcast transport stream. Interestingly, p30 is actually a part of the spec, but most don’t expect it to ever be utilized because With the advent of HD bandwidth has become a problem for all content providers, but it helps if you understand how it is managed.

HD 101: What is ATSC, PSIP, QAM, and 8-VSB?

So in other words as technology evolves we find new ways to send more bits across the same 6MHz channel. One way they do this is by putting multiple HD streams on one channel. American broadcast television Template: There is one station at The cable provider’s STBs don’t have the channel mapping problem because they have access to pspi virtual channel table.

Advanced functions such as recurring events, default event, search event gaps, search event overlap and event over run control are provided to minimize user input.

Program and System Information Protocol – Wikipedia

PSIP is not only the foundation for maintaining the station’s digital TV identity but, also the delivery of a rich variety of television-related data services, including the electronic program guide data, caption service data, content advisories, and support of multiple languages. Now while this isn’t the typical make sure you have your HDTV configured to watch HD post, it will help you understand the different ways HD is delivered.

This is where instead of sending every channel to every house, all the time, only the channels that are being watched are being sent. Each of these channels is like real estate — they aren’t making any more of it — and broadcasters get a license from the FCC to use it with some non-monetary strings attached.

  KYMA PROTOTYPES PDF

Retrieved from ” https: Got a basic HD topic that you’d love for us to explain?

And of course QAM doesn’t evolve overnight, atcs operators have to find new ways to make more efficient use of the bandwidth currently available. What this really means is that everyone gets their own dedicated channel. By using this site, you agree to the Terms of Use and Privacy Policy.

While understanding the ins and outs of either standard is well beyond the scope of any article, you should know that atdc use the same size channels 6MHz and that until a channel goes all digital, it is actually broadcasting on both frequencies simulcasting.

Program and System Information Protocol

Expanding a cable plant’s QAM infrastructure can be very expensive, especially when you move closer to consumer’s homes because you need more equipment. Unfortunately in practice qtsc isn’t the case, and our beautiful HD turns into block city.

So the operators deploy a technology called statistical multiplexing to try to dynamically allocate enough throughput to each stream. PSIP information may be passed through the airchain using pxip protocols or through use of the Programming Metadata Communication Protocol metadata scheme.

Tired of Google’s complicated answers when you asked for a simple explanation? As the digital transition is completed and broadcasters move frequencies — either away from VHF so other services can use it, or are simply moving back to their original channel assignment — most ATSC tuners will require users to rescan in order to update the table.