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Is 720p vs 1080i worth being concerned about? Yes and no. If you're a consumer looking for a new TV, you can happily ignore the 720p vs 1080i debate because every TV which is described as HDTV or HDTV Ready is required to support both formats.
NOTE: You should be aware though that lots of TVs which support 1080i have fewer than 1080 lines and so scale the 1080 signal down. That's not a huge issue as even scaled down 1080i is far ahead of a regular NTSC signal. It is worth bearing in mind that more expensive HDTVs tend to have better scalers than cheaper ones, and this may be an issue.
However, for broadcasters it's a live issue. Should they broadcast 1080 lines of interlaced video or 720 lines of progressive scan? They could just broadcast two signals, one in each format, but that would use up a huge chunk of bandwidth and be hugely expensive for very little gain.
To answer the question, it's important to understand the difference between 720p vs 1080i. A 720p signal is made up of 720 horizontal lines. Each frame is displayed in its entirety on-screen for 1/30th of a second. This is know as progressive scan (hence the 'p')The quality is like watching 30 photographic images a second on TV. A 1080i signal comprises 1080 horizontal lines but all the lines are not displayed on-screen simultaneously. Instead, they are interlaced (hence the 'i'), ie every other lines is displayed for 1/60th of a second and then the alternate lines are displayed for 1/60th of a second. So, the frame rate is still 30 frames per second, but each frame is split into two fields, which your brain then puts together subconsciously.
Most of the time interlacing works fine, but for fast moving images, such as sports like baseball and hockey it can cause problems which manifest themselves as a 'stepping' effect on-screen. Progressive scan signals don't have this problem and so are better suited to sports.
ESPN puts it like this: 'Progressive scan technology produces better images for the fast moving orientation of sports television. Simply put, with 104 mph fastballs in baseball and 120 mph shots on goal in hockey, the line-by-line basis of progressive scan technology better captures the inherent fast action of sports. For ESPN, progressive scan technology makes perfect sense.'
Bottom line? For us, as consumers 720p vs 1080i is not a debate worth worrying about, so you can relax and focus on all the other criteria on your list when you buy your next HDTV.
Since man's advent on the planet, we have always been fascinated by the outdoors. Although the world infrastructure has since changed and there are more buildings and the world looks more like a concrete jungle, the allure of the outdoors has not left man. Weather permitting many individuals and families still find themselves walking jogging, going for picnics, camping and other exciting recreational activities. Because of the time spent outdoors, people now carry their electronic gadgets with them when venturing outdoors. In the last 20 years we have seen the musical devices such as the walkman and Discman become popular and now the iPod has hit the consumer market. With the Discman, one could easily carry their favorite music with them anywhere they went. The iPod comes with a set of quality earphones. As MP3 devices and iPods have evolved, outdoor wireless speakers have also evolved with them. The classic iPod now comes with a capability of adding external speakers meaning that one need not necessarily listen to their music alone.
Wireless speakers have been a welcome addition to the world of outdoor electronics especially iPods. This is because for the iPod, bulky CDs were eliminated and music is transferred digitally from its source, in this case ITunes, directly to the iPod. And with the colossal storage capacity of the iPod, people could now travel outdoors with thousands of tunes in their iPod device. With outdoor speakers, a group of outdoor enthusiasts could enjoy an endless stream of musical playlists in CD-quality fashion wherever they are.
Due to the fact that many people now use computers are multimedia gadgets to watch movies, stream sound and video, attend conference calls, use voice recognition software to dictate writing and the like, computer speakers have not only become an absolute necessity but have become more and more sophisticated.
The major outdoors computer manufacturers are Dell, Compaq, HP, Acer, AIWA, JVC, Creative Labs, Harman Kardon, Bose and Samsung, all of who are also household names when it comes to consumer entertainment electronics. Bose speakers are especially in high demand although because of their high quality, can be a little pricy. Other companies such as Apple also create outdoor wireless speakers for their portable musical gadgets.
For a price of around 0-400, one can get some quality wireless outdoor speakers which promise a rich sound regardless of where one is located. Outdoors speakers have become popular owing to their convenience. They can be easily carried and then deployed out of site where they do not hinder any social activities and all this without compromising the sound quality.
One downside with outdoor speakers is the fact that they are battery powered. This has its own limitations in that in the event that the batteries strength begins to diminish then the quality of sound will also begin to suffer. The length of the musical experience is therefore limited to how long the batteries last. If the outdoor event continues for an extended period then the cost of batteries can be high.
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