Category: shopping

World widescreen web

Thinking of upgrading your conventional picture-tube TV to a fancy new flat-panel widescreen? But you’re on a budget and don’t want to go overboard? Confused about what size TV to buy? You’ve come to the right place.

The main criterion for choosing a screen size is one that I have not seen described in other TV buying guides: viewing area. The viewing area of a 32″ conventional TV is 492 square inches, whereas the viewing area of a 32″ widescreen TV is a mere 438 square inches! If you’re upgrading from a 32″ conventional TV you’ll want at least a 34″ widescreen to get the same viewing area.

Here’s how I arrived at those figures.

The advertised size of a TV display is the length of the diagonal. If from the diagonal we can determine the height of the display, h, and the width, w, then the viewing area is h×w. Thanks to Pythagoras we know that h2+w2 = 322. But this isn’t enough information to determine the viewing area: we also need the fact that the aspect ratio of most conventional TV displays is 4:3, which means the width of the display is four-thirds the height.

Substituting 4h/3 for w and then simplifying gives us:

h2+(4h/3)2 = 322
h2+16h2/9 = 322
25h2/9 = 322
h = √(9×322/25)
h = 3×32/5 = 19.2

Plugging that into the formula for viewing area (h×w) and recalling that w = 4h/3,

h×4h/3 = 19.2×4×19.2/3 = 491.52 square inches

Knowing that the aspect ratio of widescreen displays is 16:9 and using similar arithmetic gives a result of 438 square inches for a 32″ diagonal.

In fact, the math shows that for a given diagonal, the viewing area of a 16:9 display will always be about 11% less than the viewing area of a 4:3 display.

But wait! It’s not as simple as finding the widescreen TV that has at least the same viewing area as your conventional TV. You should also take into account the kinds of programming you watch.

Do you watch a lot of wide-format movies on your 4:3 TV? If so, you’ve certainly noticed the “letterboxing” needed to fit the wide aspect ratio of the film into the narrow one of the display. You’re not using the entire viewing area; some of it is wasted, as much as 32% of it for very wide format formats such as “CinemaScope.” With a 16:9 TV the need for letterboxing wide-format movies is decreased or eliminated.

Similarly, if you watch a lot of conventional TV programming (sitcoms, newscasts, etc.) on a widescreen TV, you’ll get “reverse letterboxing,” also called pillar boxing, where the black bars appear not on the top and bottom but on the left and right of the image to make the taller aspect ratio fit into a shorter one. Here again you’re wasting some of your viewing area.

So think about the kinds of programming you watch and consult this handy table that shows the true image size (in square inches) for various combinations of TV diagonal size, TV aspect ratio, and programming aspect ratio. Choose a TV that gives you the best image size you can afford for the types of programming you typically watch.

Program aspect ratio
1.33
(4:3)
very common		 1.66
(5:3)
some movies		 1.77
(16:9)
“widescreen”		 1.85
(13:7)
VistaVision		 2.35
(33:14)
CinemaScope
4:3
screens		 20″ 192 154 144 138 109
27″ 350 280 262 252 199
32″ 492 393 369 354 279
36″ 622 498 467 448 353
42″ 847 677 635 610 480
46″ 1016 813 762 732 576
50″ 1200 960 900 865 681
16:9
screens		 20″ 128 160 171 164 129
27″ 234 292 312 299 236
32″ 328 410 438 420 331
36″ 415 519 554 532 419
42″ 565 707 754 724 570
46″ 678 848 904 869 684
50″ 801 1001 1068 1027 808

OMG OMG OMG

The one I’ve been waiting for!

Too excited! Must… maintain… composure… in workplace!

I may be a “recovering Star Wars nerd,” but c’mon, man. Cool is cool.

Score!

Recently I discovered that Sony is planning a new in-dash car stereo with a USB port for reading and playing MP3 files from a thumb drive. I had an earlier such model but it got stolen. I replaced it with a JVC model that I don’t much like. (Among other things, its clock won’t display when the unit is switched off. And when it does show the time, occasionally the time display won’t update itself for many minutes in a row!) For someone with a long daily commute, a good car stereo is indispensable. So I’m interested in Sony’s latest and I have been checking Amazon periodically to see when it’ll be available to order.

While checking just now I discovered that Harry Potter and the Deathly Hallows — the final book in the series — is now available to pre-order. Its just-announced release date is 21 July. Yay! Into the shopping cart. I’m proud to be among the first to pre-order it. Thanks to an automated recommendation I also discovered that Universal Hall Pass — Melissa Kaplan’s post-Splashdown band — has a new EP out. On it she collaborates with former Splashdown bandmate Kasson Crooker — yay! Into the shopping cart.

Today’s run of luck continues…

My Civic duty

My car, the Nimble Imp, is a nine-year-old Honda Civic hatchback. On Thursday it wouldn’t start, so we towed it to a garage. On Friday we learned that it had a dead battery ($100) and a leaky clutch master cylinder ($600) — and that according to Edmunds, it’s worth $767, or $67 more than the cost of the repairs I’m facing.

On Saturday I began car shopping.

Fuel efficiency is my main criterion. I’m intrigued by the Toyota Prius — I’ve driven one and liked it — but the car I’m really after is the new Honda Fit. I have some lingering doubts about the Prius’s hybrid drive — just how long do those batteries last, anyway, and what is their true environmental impact? — whereas the Fit’s gas mileage is almost as good, its price is right, and it doesn’t have a distracting video display in the center of the dashboard. Only the name is a little off-putting. (I like its European name better: “Jazz.”) Yes, it’s tiny. No, I don’t have a problem with that. So I ordered the Consumer Reports price report and started calling Honda dealers to find one where I could test-drive a Fit.

Marin Honda didn’t have any. Neither did Honda of El Cerrito. Nor did the San Francisco, Berkeley, or Oakland Honda dealers. I called Walnut Creek Honda — no luck. I called Concord Honda — no. San Leandro, Burlingame, Hayward, Redwood City — no, no, no, no. At Vacaville Honda (42.7 miles distant) they thought they might have one or two on the lot and promised to check and call me back in five minutes. Mmmmmmmmmmno. I began to feel like I was living in the Cheese Shop sketch.

Glickstein: You do have some Hondas, don’t you?
Element: Certainly sir! This is a Honda shop, sir. We’ve got–
Glickstein: No, no, don’t tell me. I’m keen to guess.
Element: Fair enough.
Glickstein: Element?
Element: Yes.
Glickstein: Ah! Well I’ll buy one of those then.
Element: Oh, I thought you were talking to me, sir. Mr. Element, that’s my name.

It took a not-inconsiderable effort of will to psych myself into buying a car this weekend, but psych myself I did, and for a couple of hours on the phone Saturday morning I persisted in spite of the best efforts of Bay Area Honda salespeople uncharacteristically to prevent me giving them my money. But they finally wore me down, with the result that I authorized the $700 repair of my $767 car. I am “Fit” to be tied.