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cdtv_admin@cdtv.ca 02/29/2004
2:22 PM
I received a friend’s Hitachi 53FDX20b Projection TV, which I have it hook to satellite.
The pictures am getting are not as crisp as the one am getting on my
Sony KV-32S20. What is wrong with the Hitachi HDTV? Is there something missing.
I have it hook exactly as in the manual.

2:24 PM
The Hitachi 53FDX20b Projection television is user-selectable to operate at either 1080i or 540p in the menu. Best on-screen resolution will be at 1080i. Suggest you check also alignment and focus which are likely to move slightly if the television is moved. It includes very sophisticated automatic and manual software to perform this, which is accessible through the menu. Remember also that any comparison of resolution (crispness) should be when looking at real HDTV material and at similar screen-height distances, 78 in. for the Hitachi and 48 in. for the Sony

9:55 AM
What is the difference between HDSC 1080i/540p HD-and 1080i HDTV/480p EDTV Compatible.
If I am to buy a TV, which one should I buy?

10:04 AM
The label HDSC means High Definition Scan Conversion, a technique in which all incoming formats are converted to the HD format, either 1080 interlaced or 540 progressive, which are the same from the display viewpoint. Thus the display operates in a fixed HD format, a necessity for panel displays such as LCD, DLP and Plasma and a design simplification for CRT displays. As a general comment, using the display as a format converter is unlikely to be as effective as a digital format converter connected to an good HD display.

10:48 AM
actually the standard now are either 1080i or 720p

11:53 AM
konecny@sympatico.ca wrote on 04/03/14

Many wide-screen 'HDTV ready' set advertise 1280x768 or 1024x768 pixel LCD or DLP chips. How can they legally claim to be HDTV which requires 1920x1080 pixels?

12:09 PM
In the FAQ section of this site, the definitions of HDTV are shown. Have a look there and in particular look at:
What are the Minimum Features a TV Must Have to Qualify as a High Definition TV (HDTV)?
The minimum performance attributes for HDTV are:
Picture Quality: vertical display resolution of 720p,resulting in 921,600 pixels per frame, or 1080i or higher delivering a picture of over 2,000,000 pixels.
Aspect Ratio: capable of displaying a 16:9 image at the minimum resolution level. Should your HD set be a 4:3 natural display, the HD signal will be letter-boxed to a 16:9 aspect ratio, and the set manufacturer will identify the number of active scan lines: 540 in progressive or 810 for interlaced formats.
Audio: receives, reproduces, and/or outputs Dolby 5.1 digital audio.
Tuner: receives all ATSC Table 3 formats and displays them in their original format (see chart below).

11:18 PM
Mihai_bota@hotmail.com wrote on 2021/12/16

HDTV set and standards
I am planning to buy a new TV. The one I am looking at (Toshiba 26HF84) has 480i, 480p and 1080i, but no 720p. How do you think will that affect my experience? Obviously in case I do not want to get the HD box from Rogers, but get some HD programs with an antenna. With the exception of City TV is there any other station that broadcast HDTV over the air (in GTA)? Do you know what format are they using?


Comment from Amin..

1. The lack of 720p will only be marginally noticeable on some fast moving scenes, such as sports and perhaps on some movies. The differences on most programming are hard to see.
2. Most broadcasters are using 1080i for HDTV at present. Some others, such as Fox, ABC and ExpressVu use 720p for most programming. Your TV will take care of the conversions and convert all formats to that of the screen.
3. In Toronto and the GTA, CITY TV and Toronto 1 are the only DTV broadcasts currently on-air. CBC will be coming on early in 2005. In many parts of the GTA, you can also receive the US stations from Buffalo/Niagara Falls off-air with an outdoor antenna.

4:55 PM
gailwiebe@sympatico.ca wrote on 2022/01/15

HDTV Limit
Is there a higher resolution than 720p or 1081i for HD televisions and broadcast transmition? Some HD vendors claim they have higher than these resolutions.( for PC use mainly) Will I get better picture quality if I opt for one of these higher than 720p or 1080i HDTVs?

Comment from Admin.

The highest picture resolution specified in the ATSC transmission standard for HDTV is 1920 x 1080 pixels for the so-called 1080i format. In the production studio higher resolutions are used for film production and 1080p is used for HD movie production. HDTV Displays commonly available for consumer use are 1280 x 720 or 1366 x 768 pixels in DLP, plasma and LCD and 1080 x 1920 in LCD and CRT. Higher resolution displays are available for computer and special video uses but their use for ATSC reception would yield but a small increment of quality improvement and some increased visibility of compression artifacts. Some “HD Compatible” displays in the market use 852 x 480 and down-convert everything to this level, with some loss of quality.

7:29 PM
drankine@nbnet.nb.ca wrote on 2021/03/22

I bought a 42 inch Sony Grand Wega KF-42WE620 two months ago. The right side of the screen is totally black and the left hand side is much lighter. In the middle there is a big white spot the size of a softball. When I watch movies, I can still see the white spot in the middle. Is this normal for these type of high definition T.V’s? Cause I have no clue.... PLEASE HELP ME!

Comment from Admin.
You describe some serious problem with the HD television. This television is an LCD rear projection device, using three LCD chips. No, it definitely is not normal and I suggest you contact Sony technical service to have the problem fixed. Sounds as though there is a problem with the optics. This display is capable of very high quality picture reproduction and anything less indicates a problem. Good luck.

10:52 AM
allensusan@rogers.ca wrote on 2021/05/15

HDTV What should I know about the advent of Super HDTV? For example, how will it differ from HDTV? I am about to purchase a high end plasma HDTV - should I wait?

Comment from Admin.

The HDTV that is offered today Over the Air, on Cable and Satellite is based on a scanning system of 1920 x 1080 lines interlaced or 1280 x 720 lines progressive (See FAQ’s on this site for definitions if needed). This represents the current state of technology for consumer applications and is unlikely to change for many years to come. True, there already exist higher definitions for a variety of professional applications, but they are not transmissible to the home and are not receivable on consumer equipments. So you can go ahead and purchase your HDTV equipment with confidence but make sure that it really is delivering HDTV and not something less. The chack list on this site in the Buying HDTV is a useful guide for making the selection.

0:21 AM
uio9992003@hotmail.com wrote on 2021/08/04

LCD TV resolutions
Hi, I've been looking at the LCD TV’s recently, and I noticed that the resolutions seem to be 1280x720 or 1366x768 or 1280x768. If 720p is 1280x720, would I be better off buying the model that has that exact resolution? Is there a reason why I might want the other 2 resolutions?



Comment from Admin.
HDTV resolution is either 1920 x 1080 or 1280 x 720 in a 16:9 aspect ratio. As long as the LCD screen offers 1280 x 720 pixels in the 16:9 aspect ratio, the differences are otherwise inconsequential. As a matter of interest, 1366 x 768 is the XGA computer display format (1024 x 768 in 4:3) rescaled to 16:9. If HDTV is your only interest, there is no reason to go there.

9:00 PM
carmine@295.ca wrote on 2021/12/11

Other than the new Sony XBR & Sharp sets that will play a 1080 progressive signal which is not available from any television network, did any of the previous models reproduce 1080i, or did they just downconvert this signal to 720p? If they produced 1080i how could this be possible without the dot count?

Comment from Admin.
1920 x 1080 chips sets are in production in LCD, DLP and LCOS technologies and finding their way into the top-end consumer displays. LCOS technology is called HD-ILA in JVC products and SRCD in Sony products. Both offer 1920 x 1080 displays. Samsung is offering 1920 x 1080 displays in DLP products. Sharp is offering 1920 x 1080 displays in the large Aquos models. Previous products generally converted all formats to a 1280 x 720 format for display and LCD, LCOS and DLP technologies are all inherently progressive, making a de-interlacer necessary to deal with 1080i transmissions. Only CRT based displays offer interlaced display capability.

8:52 PM
sdockrill@hotmail.com wrote on 2022/01/15

1080p There are TV's now available which display 1080p or as they say in the literature "the full HD experience". Do any HD broadcasters currently send 1080p signals (or plan to in the future)? Do any DVD players (future)?

Comment from Admin.
Yes, there are now displays in LCD, LCOS and DLP available in consumer products that will display 1080 and of necessity with these technologies; it is in a progressive mode, i.e. 1080p. The results are very good, in terms of both spatial and temporal resolution and with good program material can be quite spectacular. Movies at 24fps or in electronic form at 1080p/24 may benefit from the 1080p screen if suitably encoded but broadcasters and programmers are currently using 720p or 1080i originations to the encoder, which will still look very good when decoded onto the new screen.

Recent news from the Consumer Electronics Show indicates that HD DVD players will be available in early 2006 and will have HDMI interfaces capable of 720p or 1080i.

2:12 PM
msheren@telus.net wrote on 2021/05/17

HDTV Sports
I notice when I'm watching fast moving sporting events in hdtv, like hockey and soccer, there is some stutter or hesitation. It is brief and it doesn't affect the audio or the picture quality except that you see slight pausing, split second, for various periods of time. Sometimes it will last just a couple of min. and other times, like right now while I'm watching Soccer in HD on espn2 it continues for the whole game. Sometimes it won't happen at all. Is this because of fairly new technology, is it common and will it be corrected hopefully soon? As far as other HD programs are concerned I never experience that problem. By the way I have a panasonic plasma 37" which I've had for 2 mos.

Comment from Admin

I suspect what you are seeing temporal artifacts brought about by the compression of a scene containing fast motion, common to many sports. For delivery to the viewer, the HD video must be compressed to ensure that it will fit inside the allotted channel and in the process the information considered “least important” is discarded. If the video contains a lot of detailed high-resolution information and much rapid motion, some noticeable information may also have to be discarded as well, resulting in noticeable artifacts. Advances in compression technology are reducing some of these effects, but the old adage “you don’t get something for nothing” applies here as well and compression always results in some loss for the gain in channel efficiencies.

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