Saturday, May 26, 2012

Guide in Buying HDTV


I wrote this article originally for the HDTVetc magazine for the August 2003 issue, and it was later published on the HDTV Magazine in 2006. Consumers still go through the same struggle at national-chain stores today. I updated the article to include current HD equipment and technologies. Its tutorial substance and analysis are still applicable today, and are intended to help consumers in making the right purchasing decisions. Enjoy the reading.





The following topics are covered in this segment:





H/DTV and NTSC TV Systems, What are they?





The First Effort of the DTV Transition





Quality HDTV, or Quantity DTV, or Both?





Backward Compatibility with Legacy Analog TV for Digital Broadcast





Satellite/Cable, and the DTV Transition





Tuner Integration





The Effect DVD had for DTV





The Rush for Knowledge













You have been hearing about HDTV and decided to start looking for one. A friend of yours reminds you that the general knowledge about buying regular TVs from the CRT analog era is not sufficient to select a digital product today, so you quickly review what you read about widescreen, black bars, digital tuners and resolution, and hope things would clear out at the store.





You get into the typical nationwide consumer electronic store most people go to, and suddenly see several dozens of HDTV demo sets staring back at you. A salesperson is approaching you, the person's face is familiar; the salesperson is the one that sold you the new dishwasher two weeks ago; now the person is selling HDTVs with authority. At that point you start feeling worried, but you hang in there.





Obviously this store is not a quality dedicated A/V retail place. Many consumers make their purchases based on the uninformed advice of untrained staff from typical nationwide consumer electronic chains.





In the near past, a typical store could only have one of those HDTVs actually displaying HD, the only one that had an HD tuner; the rest were showing the same image from a video distribution loop not suitable for HD quality.





Today perhaps the whole store feed is all HD, and the sets that are staring at you show the same picture, but with different colors, contrast, image enhancements, blacks, whites, etc. because no one bothered to set them correctly. So you start wondering why HDTV is not consistently perfect as is being preached, is that what HDTV is about?





The sales person turns toward you and, in the middle of your consumer panic attack, tells you: "trust me, buy this TV, it would look much better at home once connected to an HD tuner". Would you buy a car without test-driving it?





Millions of people went through similar experiences since HDTV was introduced in November 1998. Fortunately, some improvement is gradually seen in the stores, especially in dedicated A/V retail stores, which should take more time to help consumers understand the concepts behind each display technology, and not just quickly sell the HDTV inventory with the red tags, as most national consumer electronic chains do.





Most consumers love red tag savings, and many leave the stores wallet-happy with a product they do not understand. Perhaps many of those do not actually want to understand because the HDTV technology has been introduced with a complexity level they refuse to deal with to just get a TV.





To illustrate the complexity of an HDTV purchase decision you might want to read Is HDTV Complex Enough?





The objective of the article you are reading is to help you make your purchase with more confidence, but first allow me to cover the following basic subjects about HDTV:





H/DTV and NTSC TV Systems, What are they?





You might already know of the US plan to replace our current analog interlaced TV system (NTSC) dated from the 1940's by a digital DTV system, by February 17, 2009. Curiously enough the idea started as "analog" HDTV until General Instruments proposed an all-digital system in 1990.





The DTV standard is composed of 18 digital formats grouped into two levels of quality, as approved by the ATSC (American Television Systems Committee) in 1995:





1) SD: Standard Definition, with 480i/p (i:interlaced, p:progressive) viewable horizontal lines of vertical resolution (rows counted from top to bottom), each line with up to 704 total pixels of horizontal resolution (counted from left to right), and with an aspect ratio (relation of width to height in units) of 4x3 (as regular TV), or widescreen 16x9.





2) HD: High Definition, with 720p and 1080i/p viewable horizontal lines of vertical resolution (rows counted from top to bottom), each line with respectively 1280 (for 720p) or 1920 (for 1080i/p) total pixels of horizontal resolution (counted from left to right), and only in widescreen 16x9 aspect ratio.





Note that, because is not complex enough, the horizontal lines (rows) are expressed as "vertical" resolution (480, 720, 1080), and the vertical columns made of the aligned pixels on the horizontal lines are expressed as "horizontal" resolution (704, 1280, 1920).





DTV was 15 years in the making before it went on the air in November 1998. HDTV is the quality part of DTV, but its implementation is not mandatory, SD is. I will use the term DTV only when addressing the digital TV system in general.





Later in 2000, the Consumer Electronics Association (CEA), allegedly to help confused consumers, created another resolution level in between: ED (enhanced definition).





This promoted the 480p SD format to ED level, leaving only the 480i format in the SD level. It also granted any TV the right to be labeled HDTV if capable to display only 810i lines of vertical resolution within the displayed image, rather than 1080i.





One can argue how much this intervention from the CEA helped consumers more than helped manufacturers getting rid of mediocre sets. But that was back when CRT based DTV sets were the strength of the market; now most DTV sets are fixed pixel displays and their resolution is clearly specified as a pixel count in both directions.





Our current NTSC over-the-air (OTA) TV system is 480i analog interlaced (actually 525i with 480i viewable horizontal lines of vertical resolution). The regular channels of digital satellite and digital cable could be compared to digital SD of broadcast DTV, but they are also transmitting dozens of channels in HDTV.





To facilitate the transition, broadcasters were given one extra channel slot from the FCC for the simultaneous broadcasting of the analog and digital versions of their programming. It is a large investment for TV stations to build a DTV facility with new cameras, production, equipment, etc.





When DTV is fully implemented, broadcasters have to return one of the two channels, analog over-the-air broadcasting will stop, and current analog TVs, VCRs, TiVos with analog tuners would stop "tuning" as well (but they will still work as display devices if fed with a 480i analog signal from a converter, VHS tape, DVD player, etc). This date was originally set for January 2007 but has been extended to February 17, 2009. Once DTV is implemented, the FCC will auction that spectrum of airwaves.





Most OTA terrestrial TV stations are already broadcasting DTV in SD and HD widescreen, and consumers are buying HDTV sets at accelerated pace every year.





The First Effort of the DTV Transition





Just a look back at CEA's 2003 statistics, on the first 5 years of HDTV approximately 6 million DTVs (of which only 300,000 where integrated with DTV tuners) and 400,000 tuner set-top-boxes (STBs), were sold between 1999 and 2003. By the end of 2007, the HDTV count was 8 times fold, and about 50% of households have digital TV sets, according to the CEA.





Back in 1998/9 it was not unusual for first generation HDTV monitors to cost $10,000, and HD STB tuners to cost from $700 to $3,000. It was expensive for early adopters.





By the end of 2007, a huge variety in technologies and TV sets was available for every viewing environment. DTV sets are much better in quality, and sell for a small fraction of the price they sold back in 1998.





Quality HDTV, or Quantity DTV, or Both?





We all love the incredible video quality of HD, however, since HD is not mandated within the DTV plan, it allows a broadcasting station to use the allotted 6 MHz space (for the HD channel), to multicast instead several sub-channels of lower SD quality, as it is actually happening on many stations across the US.





When sharing the same 6MHz total bandwidth, SD sub-channels rob about 2-3 Mbps each from the needed bandwidth of an HD channel that by itself should broadcast at 19.4 Mbps (if the station also multicasts an HD sub-channel). The parallel broadcast forces further compression of the 19.4 Mbps HD signal to a lower bit rate to make room for the SD sub-channel, compromising HD quality.





In many cases, more than one SD sub-channel is multicast together with the HD sub-channel. When the reduced HD bit rate compresses the signal beyond acceptable limits, it renders a lower quality image with noticeable artifacts, especially on fast moving images in sports, which are more evident, and unacceptable, on large screens (more on it later).





It might also be possible that the TV station desires to share some of the bandwidth for data-casting interactive services, or for mobile DTV applications for hand-held portable devices (because there will be no analog broadcasting to those portable devices as well). For more information, check the articles I wrote on the "Mobile DTV" series, where I analyze the potential impact of mobile applications on the quality of an HD channel when robbing from its bandwidth.





We all hope that HD will reign, and HD quality will prevail over the digital-quantity business models, and you have to encourage DTV broadcasters to do so, besides, most consumers bought an HDTV not a SDTV.





Backward Compatibility with Legacy Analog TV for Digital Broadcast





When the DTV broadcast is fully implemented in February 17, 2009, there would be backward compatibility with your current analog equipment, but there is a catch, in order for you to watch DTV terrestrial digital channels on your current analog TV you would need a digital over-the-air STB tuner connected to it. Your current analog TV would display an analog interlaced 480i version of the digital image.





There is no need to rush for the replacement of an analog TV that might be in good working condition if you just want to continue watching similar quality TV, but you would have to buy a STB digital tuner for broadcast DTV.





This applies also to your analog VCR, DVD recorder, TiVo, etc., if you want them to have broadcast tuning independence. A few years ago, DTV STB tuners were relatively expensive, in the $400-$1000 price range, imagine buying a $400 digital tuner for a $30 analog VCR, but they are gradually coming down in price.





The US government has approved a subsidy coupon program to help people purchase DTV tuners to facilitate the analog-to-digital transition so existing analog TV sets can continue to be used for broadcast digital DTV.





For that purpose, Congress approved a fund of $1.5 billion dollars, with an initial allocation of $990 million dollars to subsidize up to two $40 coupons per household. The coupons became available in January 2008 and can be requested by consumers until March 2009, to use them toward the purchase of two DTV tuners.





The two coupons cannot be used together to purchase only one DTV tuner, neither they can be used to buy another type of OTA tuner/DVR STBs, satellite STBs with broadcast DTV tuners into them, or cable STBs.





The tuners offered by this program are expected to cost in the $50-$70 range each; the consumer would have to pay the difference after applying the $40 coupon. According to the plan, the tuners would become available by mid February 2008 through the national chains of Best Buy, Circuit City, etc.





Although the subsidized tuners are designed to tune digital SD and HD channels, they cannot output the tuned signal other than 480i analog resolution to an analog TV. In other words, the subsidized tuners would not perform as typical HD tuners passing resolutions of 480p, 720p, or 1080i to HDTV devices for HD viewing. Their functionality is just to downconvert because their purpose is backward compatibility to analog TVs, but their price is lower than typical ATSC HDTV tuners with variable output resolutions and digital outputs.









Satellite/Cable, and the DTV Transition





If you are a satellite subscriber you already have the satellite STB you need for their digital SD/HD services. Additionally, most satellite boxes also have a terrestrial ATSC tuner if you want to get free local channels using a VHF/UHF antenna. However, DirecTV introduced a new model in late 2007 without antenna input; the local channels would have to be viewed from the satellite feed, a service they have already for most major cities.





If you are a cable subscriber, when the cable company decides to disable the analog feed to your household and supply only the digital feed, you would need a digital-to-analog cable STB to view the digital channels on each analog TV in your house, similar to the approach of the coupon program for broadcast DTV above, but you would have to lease or buy the cable STB, no coupons.





Cable companies were authorized by the FCC in late 2007 to continue their analog feed service for another 5 years (up to 2012) if they prefer, but they are not obliged to do so. Cable STBs do not have DTV digital terrestrial tuners into them so you cannot use their STB connected to a UHF/VHF antenna to receive free local channels.





Cable companies face at least two alternatives on the analog-to-digital transition between 2007 and 2012:





a) If their subscriber base is mostly digital, a cable company might have the incentive to make a large up front investment to acquire enough digital STBs to convert all the remaining analog subscribers as soon as possible to digital tier services, who would have to lease one digital STB for each analog TV. That would release the bandwidth occupied by the analog broadcast channels on the cable feed, which could be used for additional digital channels, and receive an increased revenue if those are premium, VOD, PPV, etc. paid services.





b) If the subscriber's base is mostly analog, a cable company might prefer to keep the existing mix of analog and digital STBs, and maintain the analog tier as long as needed until 2012. Since the cable feed bandwidth allocation for the analog broadcast channels must continue with this alternative, the company would have to postpone the potential growth of digital channels and services, but there will not be a need for an up front large investment for expensive digital STBs because there is no forced conversion. This option seems economical for both the company and the subscriber, because a subscriber would not be forced to lease a digital STB for each analog TVs that might be currently connected to the wall coax without a STB, as many non-primary TVs are in most households.





While the up front investment of a large number of digital STBs could be expensive to a cable company, there could be a partial offset with the potential revenue received from additional digital pay services such as VOD, PPV, or premium channels. Additionally, the number of digital STBs required for a full digital conversion of the cable feed might be further reduced when considering the growing base of integrated HDTVs with CableCARD tuners expected to increase in 2008 and 2009.





However, since the integrated CableCARD tuners within HDTV sets are only unidirectional, there might still be a cable subscriber's base that would still require the bi-directional capabilities of cable HD-STBs for VOD, PPV, and cable supplied programming guide. Each cable company would have to balance those factors until 2012.





Tuner Integration





In 2002 the FCC issued a "mandatory" plan to gradually integrate digital broadcast tuners into DTV monitors and other tuning devices, such HD DVRs. The plan has been already implemented in 2007 for all the sets larger than 13", and all DTVs on sale today are mandated to include digital terrestrial tuners (except for some industrial/professional models). In most cases they also include a cable on-the-clear tuner for non-premium unscrambled channels, or even include a CableCARD tuner for premium channels and services.





As mentioned above, the CableCARD tuners are unidirectional only, and lack the bi-directional features of Video-on-Demand, Impulse Pay-per-View, and cable-company supplied programming guide, for which a separate set-top-box from the cable company would still be needed until integrated TV sets are designed to have bi-directional capabilities on their integrated CableCARD tuners.





Industry analysts commented for years that economies of scale would bring down the price of digital tuners to the level of today's very low price analog NTSC tuners within TVs, but the reality is that STBs for ATSC terrestrial, or for cable, satellite, DVRs, etc. (not the down-converting government-coupon STBs) still have a high price, considering that comparatively, large HDTVs came down from the $5,000-$10,000 in 98/99 to more accessible prices below $1000.





More on this subject is covered further down.





The Effect DVD had for DTV





Most of the 6 million people that bought HDTVs on the first 5 years of the transition (98-03) did so NOT to view HD, but rather to enjoy playing widescreen DVDs at 480p. Even now in 2008, after Hi-Def DVD has been already introduced in early 2006, regular DVDs are still a favorite content for DTV, because they certainly display quite well as progressive 480p, or upscaled to 720p or 1080i/p to the native resolution of the digital set (by either the DVD player or the TV set). The same DVD played on an analog TV would only show the image as a 480i interlaced scanning.





In addition, an HDTV has the capability to show widescreen DVDs in anamorphic format displaying all the original vertical resolution stored on the disc, while 4x3 analog TVs would show the same DVD letterboxing the image between larger top/bottom bars in order to maintain the wider aspect ratio of the movie, and with less vertical resolution for the image itself.


Friday, May 25, 2012

High Definition Stalemate


For those who have not yet settled on which high definition disc to invest in, this article will help bring several issues to light. First of all, the potential video and audio quality remain alike between both formats, HD-DVD and Blu-Ray. The difference lies in the laser that reads the disc; where the former uses the identical red laser used to read DVDs, the latter employs a blue laser that reads only Blu-Ray. Both lasers can decode an identical amount of information, called the bitrate. A bitrate can be labeled as the amount of "bits" decoded per second. Generally, the higher the bitrate the higher the quality of video/audio. So a bitrate of, say, 30mbs (megabytes per second) should be preferable to a meager 10mbs. The average hi-def picture, with its superior clarity and contrast, can maintain a bitrate between 15mbs-35mbs; compare this with an ordinary DVD, which averages 2mbs-7mbs.





With its ability to store and transmit at a higher bitrate, hi-def media easily trumps the quality of DVD. This higher bitrate allows for less compression, and thus can retain most of the clarity from the original master print of a movie; whereas a DVD will look blown-up and fuzzy. But the differences between HD-DVD and Blu-Ray begin with how they can be played. HD-DVD players have the advantage of backward compatibility, as it can playback DVDs. Blu-Ray players cannot, due to their unique laser, which completely isolates it from older generation technology. But the advantages of Blu-Ray lay in its inherent differences.





Blu-Ray players come equipped with Java software, which some believe to allow more interactivity with the user. This gives it the ability to have fancier menus and in-depth bonus options, such as picture-in-picture display. At the moment, bugs and slow performance have hindered some confidence in its support of Java, where Bill Gates complained that it was not user friendly enough to be used in PCs. Counter this with HD-DVD, which uses Microsoft's own HDi Interactive Format. It allows anyone to author simple content, where Java requires a more intimate knowledge of scripting.





If all the information so far sounds redundant, it is. The only thing that can make or break a hi-def entertainment center does not stem from the format at all. In fact, it all depends on what you choose to display it on. Be weary of interlaced televisions. Rather than playing back video at 1080p (progressive), the user gets short-changed with 1080i (interlaced). Progressive scan means that the picture gets scanned upon each frame; this results in a properly displayed picture, like a solid photograph, with no aberrations. Interlacing occurs when no progressive scan exists in the television, and so the picture gets displayed as a series of individual lines rather than as a single, uniform "photograph." In short, the fine edges in a progressively scanned movie may otherwise appear to be jagged, or even fuzzy, on an interlaced display.





The only reason to get invested in the so-called format war would be to avoid a costly personal investment if "your" format ever loses. Blu-Ray may be considered to be the superior technology, as its unique blue laser, while radically different and incapable of DVD playback, allows for exciting future developments. HD-DVD, largely compatible and user-friendly, is considered by some to be a static technology. Lately, however, Toshiba released its plan to market the format as cheaper, practical alternative to Blu-Ray. And, in the event that you still cannot make up your mind, there exists a combo Blu-Ray/HD-DVD/DVD computer drive that sells for less than $300.


Thursday, May 24, 2012

Hot Gadgets: Holiday Must-Haves for 2007


Each summer, consumer electronics gurus peer into their crystal balls to anticipate what hot gadgets will be considered must-haves for the upcoming holiday season. This year, those electronics taking center stage consist of some no-brainers as well as a few surprises. They're fun, they're innovative, and they're sure to be sold out by the end of November. Here's a preview of the hot gadgets that will be in the news and on almost everyone's holiday wish list:





1. Apple iPhone. Steve Jobs has done it again and designed a totally innovative device that's so much more than a mobile phone. With a gorgeous appearance, a bright three-and-a-half inch display, and an intuitive touchscreen user interface, the iPhone is captivating. And that's before you even get to the features, which include an exceptional cell phone with visual voicemail, a digital camera, email functionality, a web browser, an iPod for music, and SMS. The applications, such as Google maps, stocks, weather, notes, and so forth, are just as impressive. As is the $500 price tag. Nonetheless, the iPhone is sure to top many holiday wish lists.





2. i-Sing from Outrageous. Consumer electronics and toy company Outrageous has taken the "American Idol" phenomenon to the logical step with i-Sing, a specialized MP3 player that is, for lack of a better term, a next generation handheld karaoke machine. After buying MP3 downloads, users can load them into the player, then use proprietary software to input the lyrics of the songs - either the original lyrics or those written by the user. Users can then easily remove the original vocals from a song and record their own voices over the melodies while reading a display of the lyrics. With an internal speaker and microphone, as well as a high quality display and earphones, i-Sing can be used to create music that users can then upload to YouTube, MySpace, and other social networking sites. And, at around $129, i-Sing is a sure-fire hit.





3. Nintendo Wii. Although the Nintendo Wii gaming console has been out for almost a year, its scarcity will still make it a hot commodity this holiday season - and for good reason. With its innovative controller and Nunchuk, Wii has taken gaming to the next level. But the Wii is much more than a gaming console. It also offers Web browsing, shopping, photo sharing, news, and much more. Now that the use of the system is ramping up, there are an increasing number of video games available for the Wii - which will also be hot this holiday season.





Each year, several hot gadgets emerge as top sellers for the holiday season. This year, you can bet that the iPhone, i-Sing, and Wii will make the cut.


Wednesday, May 23, 2012

How to Find the Best Home Theater System


Everyone wants a home theater system, but when confronted with the choices in buying one, you can get overwhelmed. No matter where you look for a home theater system, there are varying types of systems and varying prices also. So you are able to get the best theater system your money can buy here are a few tips.

When you are first shopping for a system, they all look the same, or relatively the same, on the outside. But how they work can be a completely different story. To make sure that the one you are looking at works well, try it out! You may not think the store will let you do this, but you would be surprised at the length a company will go to have your business.

If you are looking at using your home theater system as a gaming tool too, then you should take your gaming system to the store to test it out. If it isn't compatible with your gaming system, it is better to know sooner rather than later.

So you have found the best home theater system for your needs and use. The next step is to compare prices. The biggest and most common mistake made when buying a home theater system is finding the perfect system, but not comparing prices before you buy. There is nothing more frustrating then buying a system at one store, then seeing it for less money, sometimes hundreds of dollars, at another store just down the street.

Don't forget the internet when comparing prices either. Many stores offer discounts through the internet, and sometimes the companies that make the systems will have cheaper prices than the wholesaler. Make sure that you keep in mind shipping prices, but you could save money even with the shipping costs. The internet might just be the way to go.


Tuesday, May 22, 2012

How To Choose A Digital Camera


Digital cameras have exploded in popularity in recent years. The convenience that they have brought to the market with the ability to review your pictures instantly and correct any imperfections by retaking the picture and the ability to store, edit, and email them from your own personal computer has fueled this growth.

It is now no longer a matter of if you need a digital camera, but rather which one do I choose?

First decide how you are going to use the camera. If simplicity is your goal, a simple point and shoot digital camera will do. If you wan the flexibility to be able to grow with the camera as you gain experience get a point and shoot that offers manual controls, this way you will have the best of both worlds – infinite options for creativity and the ease of an automatic mode.

The next item on your agenda should be megapixels. To keep it simple, the more megapixels the better the picture will be. So, how many megapixels do you need?
If all you are doing is printing or emailing photos, a 3 or 4 megapixel digital camera will work. If you are going to use it for more professional work and enlarging photos, go with one with 5 or 6 megapixels.

If you want uncompromising clarity go with a 7 megapixel or above. Just remember the higher the megapixels the higher the price!

How much zoom do you need? You have two types of zoom with digital cameras, digital and optical. Optical is the more important because it brings your object closer without losing quality. The digital zoom will bring the object in closer, but you sacrifice the quality of the picture. If all you do is take everyday pics a 1x to 4x optical zoom will do. If you take pics like sporting events, get one with a 5x optical zoom or higher. For really intense professional work choose a 10x or better optical zoom.

Digital cameras have evolved now to the point where you can get a great fully featured camera that will fit comfortably in your shirt pocket so don’t think you have to get a large one to get good quality. If you are using it for more professional use with large optical zoom and such expect to have to buy a larger one however.


Monday, May 21, 2012

Enhance your experience of Home Theater with HDMI cables

A high quality home theater is not only about high-definition televisions and DVD players. It is also about the cables used to transmit programming through these products. A type of cable that is proving to be a winner in excellent quality is the HDMI cable. HDMI stands for High-Definition Multimedia Interface, which is an audio/video connector interface used to transmit uncompressed digital signals.




HDMI provides audio/video cables that will connect electronics such as a HD-DVD player, a personal computer, a set-top box, a video game console or a Blu-ray Disc to a digital television or digital audio device. HDMI cable compatibility was also introduced to the world of digital camera and camcorder.




Why do HDMI cables?




The old adage, "If you're going to do something, do it right!" Any configuration of high-quality home theater is as good as the cables used to transmit digital information. You can have the HD-DVD player, better, more expensive in the world, but low quality cables will undermine the quality of image and sound because the transmission is simply not good enough or powerful enough for your system achieve its maximum potential. With HDMI, you're getting a high transmission quality to your quality system, which maximizes the quality of image and sound as you watch movies, use your computer, a video game, listen to music, or anything else!




Benefits and capabilities of HDMI cable




Regular analog cables convert the digital signal to analog and then send it to the television monitor. The signal is then converted to digital to be displayed, which can cause a loss of quality during the process. With HDMI cables, no conversion is required, so there's no loss of quality. HDMI cables transmit digital signals directly and also in its purest form, eliminating the need for compression.




Another benefit is that HDMI can support large-screen visualization, including plasma panels and LCDs, 625 p, 1125p or even 1440p high speed HDMI cables with 1.3. HDMI cables simplify the process of finding yourself why audio and video signals are transmitted over a single cable. In addition, HDMI cables provide users with an interface that works with any audio/video source. In other words, all your HDMI equipped components can be enhanced with pure image and sound quality. HDMI cables can support digital audio standard, as well as increased and video high definition and 8 channels digital audio. HDMI cables can also support future upgrades with plenty of bandwidth to spare.




Shopping for HDMI cables




HDMI cables come in different compatibilities, but fortunately the high-speed HDMI will support standard systems. If you plan to upgrade in the near future, it is a wise choice to go ahead and buy the high-speed cables or cable 1.3, which can carry 1080p 120 Hz video easily to any HDMI cable can support 8-channel audio, but not all cables will support special features like video Deep Color. With HDTV color depth, Look for a version number on the cables or for other tips on the packaging that the cable will support 30-bit Deep Color or True HD.




You can easily find affordable HDMI cables online. There are electronics stores online that offer all versions of HDMI cables along with other products, including computer cables, iPod accessories, computer fans, video cables, audio cables, chargers, adapters, mobile phone accessories, digital photo accessories and more.




Don't miss out on all your home theater system can offer. HDMI cables can bring you quality images and sound like never before!


Sunday, May 20, 2012

Fun With Digital Voice Recorders


Do you need to have a recording of your telephone conversations for legal, covert or even training purposes? There are many types of digital voice recorders available. Once such recorder has a five hour recording capacity and features a caller ID, which records two way conversations with ease. It also features automatic recording that works only when the telephone is in use.

There are other digital voice recorders that are small and will record up to thirty-five hours and can be used not only with your phone, but your Mp3, FM stereo radio, cell phone or phone recorder. It is voice activated and includes the date, time stamp, flash memory and a/c adaptor, and that feature continuous recording.

Maybe you don’t want to be bothered with purchasing the actual digital voice recorders but still want the benefits of one. There is a Call Recorder Card that records both sides of a conversation, whether it is on a fixed phone or a cell phone. The card contains 250 minutes of recording time, and retrieving your recordings is as simple as can be. You can call the access number listed on the card, or you can log on to a secure server, and retrieve the information over the internet. What an easy way to keep track of sales orders, conference calls, and other important communications that may have otherwise been lost.

Want to record you cell phone calls with a simple push of a button? There are digital voice recorders that can do just that, and they do it with a standard micro cassette, two AA batteries and a telephone handset that gives you easy, hands free operation each and every time.


 

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