2007 BET Awards |
Stop Parking Domain Names Powered by WhyPark.com |
|||||
Easy DVR Recording with Analog, Digital, or Satellite Television
Television and video are terms that are sometimes used interchangeably, but differ in their technical meaning. Video is the visual portion of television, whereas television is the combination of video and audio modulated onto a carrier frequency (i.e., a television channel), so that the signal can be delivered to the receiver (TV or computer/PVR with a TV tuner). The DVR resolutions differ from the way in which a video is recorded. Analog television Analog television in NTSC, PAL or SECAM formats, analog cable, or regular VHS tapes use a signal that is fed directly to the electron beam within the television set. There are a number of details on how this is done, but in essence each line in each frame corresponds to a specific fraction of time within the signal. To record an analog signal a few steps are required. A TV tuner card tunes into a particular frequency and then functions as a frame grabber, breaking the lines into individual pixels and quantizing them into a format that a computer can comprehend. Then the series of frames along with the audio (also sampled and quantized) are compressed into a manageable format, like MPEG-2, or WMF, usually in software. Some TV tuner cards like the DVR-250/350 or the TiVo chip deliver an MPEG-2 or other compressed stream directly to the computer, performing both the frame grabbing and compression in hardware. This greatly reduces the load on the CPU allowing an overall cheaper implementation. Digital television Digital television contains audio/visual signals that are broadcast over the air in a digital rather than analog format. Recording digital TV is generally a straightforward capture of the binary MPEG-2 data being received. No expensive hardware is required to quantize and compress the signal (as the television broadcaster has already done this in the studio). The MythTV DVR supports both international DVB signals and American ATSC signals while the TiVo Series 3 supports only the ATSC signals. In the U.S., the FCC attempted to place a road-block before digital DVRs with its "Broadcast flag" regulation. Digital video recorders which had not won prior approval from the FCC for implementing "effective" digital rights management would have been banned from interstate commerce as of July 2005. The regulation was struck down on May 6, 2005. DVD-based PVRs available on the market as of 2006 are not capable of capturing the full range of the visual signal available with high definition television (HDTV). This is largely because HDTV standards were finalized at a later time than the standards for DVDs. However, DVD-based PVRs can still be used (albeit at reduced visual quality) with HDTV since currently available HDTV sets also have standard A/V connections. Satellite or digital cable Recording satellite or digital cable signals on a digital video recorder is more complex than recording analog signals or broadcast digital signals. This is so because the MPEG-2 or MPEG-4 stream is usually encrypted to prevent people from viewing the content without paying for it (usually via subscription). The satellite or cable set-top box does two things. First, it decrypts the signal. Second, it decodes the MPEG stream into an analog, DVI, or HDMI signal for viewing on the television. In order to record cable/satellite digital signals you must get the signal after it is decrypted, but before it is decoded (between steps one and two); this is how DVRs built into set-top boxes work.
Written by David Johnson. Find the latest in http://www.dishnetwork-site.com/dish-network Dish Network as well as http://www.dishnetwork-site.com/dish-network-deals Dish Network Satellite
|
2006 BET Award Winners
MORE ARTICLES: Satellite Television Is Growing In Popularity Every Day Who knew that television would become so important? In the old days of small black and white screens filled with fuzzy characters and sound coming from tiny speakers, only visionaries could imagine the world of satellite and HDTV that was to come. There used to be only three network channels, news was mostly delivered at dinnertime in the early evening and the types of programs were very limited. Moreover, they signed off around midnight! Can you imagine life without 24-hour news channels, around-the-clock updated sports and weather, International headlines and late night comedians that run into the wee hours of the morning? Once upon a time, the Ed Sullivan Show was the pinnacle of entertainment? Of course, it was good, as were the blockbu...
Direct TV Is The Best Satellite Television Provider With The Best Service
Plasma Television Facts
Satellite TV For PC - The Difference Between Satellite Television And Software For Your PC
What is Satellite Television?
Direct TV: Affordable Satellite Television
Why You Should Buy A Plasma Television
How To Choose An Audio Company To Design And Install Your Home Theatre Room Or Theater System
Choosing Between Cable And Satellite Television
Buying The Best Plasma Television
Are You Looking For High-Speed Internet, Cable television, Satellite Television, or Phone Service?
Competition Makes High Definition Digital Satellite Television Services Affordable For All
Choose A Quality Plasma Television From One Of These Two From Pioneer and Panasonic.
Schneider Cine-Digitar Anamorphic 1.33x Lens Brings Professional-quality, Full-screen Cinemascope to Digital Home Theatre
7 Tips For Buying A LCD Television
|
|||||
| Powered by WhyPark.com | Site Map | Home | ||||||