Toshiba is advertising its current C3030D series
(WXGA) and X3030D series
(Full HD) of LCD TV products with the statement “24p compatible
For some time, rumours
have been circulating in various user-oriented TV forums about the actual 24p capabilities of the Toshiba C3030D and X3030D ranges.
Toshiba 42X3030D: Does not perform as the data sheet promises in terms of 24p support
Toshiba explains “24p compatible” in its specifications
for these LCD TV sets as follows:
Almost all films produced in the USA are produced in 24 full pictures (24p) per second. These are later read at a resolution of 1,920 x 1,080 pixels as a rule and then burned onto a HD DVD for example. The fewer conversions made until the image is played back, the better the image quality. The models from the X3030D series are equipped with 1,080p-compatible inputs which can support 24 Hertz signals (24p). If you use a 24p-compatible HD player as a source, no more conversions are needed between the production of the disk and the appearance of the material on the screen. This means that consumers can enjoy judder-free films in the original film quality.
However, yesterday, the Toshiba product manager responsible was forced to admit when asked by PRAD in front of the journalists present at the IFA Preview 2007
press conference in Munich that these TV systems in fact do not feature a continuous 24p support
. In this case, the signal is displayed in 3:2 rhythm, which provokes exactly those side effects that Toshiba has been promising to prevent in its advertising slogans: juddering!
The TV systems include normal 50/60 Hz panels, which are not capable of playing back 24 Hz or multiple signals. As Toshiba was also forced to confirm the 24p input signal is converted to 60 Hz again internally.
With the upcoming Z series
, which Toshiba intends to present at the IFA trade fair, 120 Hz technology
should allow complete 24p support. However, the question as to whether this is realised via DNM implementation or whether the unaltered signal is maintained is also being hotly debated in expert circles.