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Toshiba 47Z3030D Calibration

by Vincent Teoh
30 December 2007

The Toshiba 47Z3030D offers four global picture modes (the settings cannot be saved independently per input) which can only be switched through a button on the remote control. The first three – [Dynamic], [Standard] and [Movie] – are fixed presets. However, altering any value in one of these presets would automatically transfer all the settings within that preset to the [User Settings], erasing any previously stored configuration in the process.

Greyscale Calibration

Out of the box, the [Movie] preset on Toshiba 47Z3030D came closest to the D65 imaging standard widely adopted by film and broadcast studios, although overall it remained a touch too red:

Pre-calibration CCT Pre-calibration RGB Tracking
Pre-calibration [Movie] CCT
Pre-calibration [Movie] RGB Tracking

Despite sporting the most advanced colour management system I have seen on any flat panel television to date, it beggars belief that Toshiba has once again chosen not to offer user-menu-level white balance controls on the 47Z3030D for greyscale calibration (hint: greyscale significantly affects the final colour reproduction). So I had no choice but to venture into the service menu to align the greyscale to D65. It was worth it though, for I achieved an impressive result after a few clicks here and there:

Post-calibration CCT Post-calibration RGB
Post-calibration CCT
Post-calibration RGB Tracking

Colour Calibration

One would have thought that with such a comprehensive colour management system (CMS) on board, it would be a piece of cake to finetune the colours. Unfortunately Toshiba has implemented Wide Colour Gamut (WCG) on the 47Z3030D: the green primary was so far out-of-whack to begin with that it took quite a lot of adjustments to bring it back to Rec. 709 specification:

Pre-calibration CIE with reference to Rec.709 Post-calibration CIE (reference Rec.709)
Pre-calibration CIE chart Post-calibration CIE chart

The good news is that unlike the Pioneer Kuros, tinkering with green primary colour point using the CMS (even to such an extent) did not seem to adversely affect the gamma. The final result was reasonably good; and colour decoding was excellent as I could align the colour decoders for all the primary and secondary colours through the [Brightness] controls under the [Base Colour Adjustment] submenu.

CMS

Benchmark Test Results At A Glance

Stuck pixels 0
Screen uniformity Mild backlight bleed; sides lighter than centre
Overscanning on HDMI
0% in [Exact Scan] mode
Blacker than black Passed
Black level Above average for an LCD TV
Black level retention Stable if [Active Backlight Control] off
Colour chromaticities Above average after calibration
Colour decoding Excellent
Scaling Good
Video mode deinterlacing Best I have seen on an LCD TV to date
Film deinterlacing ([Cinema Mode] on)
Excellent (3:2/ 2:2 passed in 480i/ 576i/ 1080i)
Viewing angle 100°
Motion resolution
600 with [Active Vision M100] on; 300 when off
Digital noise reduction Effective (baseline is improved over 42X3030D)
Sharpness Defeatable edge enhancement
1080p/24 capability (PS3) Accepts the signal, but telecine judder remains unless [Film Stabilization] is engaged
1:1 pixel mapping Yes, in [Exact Scan] mode for 1080 source

 

4 Star Rating: Recommended

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