Panasonic VIERA GT20 vs Panasonic VIERA PX80

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VIERA GT20 compared with VIERA PX80

	PanasonicVIERA GT20	PanasonicVIERA PX80
Overview
Released
Released	2010	2008
Display
Panel
Panel	Plasma	Plasma
Panel detail
Panel detail	UK TX-P42GT20B Full HD NeoPDP plasma with active-shutter 3D. The advertised 600 Hz subfield drive is not native refresh.	UK TH-37PX80B has 1024 × 720 native pixels and TH-42PX80B has 1024 × 768. Accepted 1080p signals are scaled to the panel; Panasonic does not publish a native panel refresh rate in the UK manual.
Resolution
Resolution	1920 × 1080 (Full HD) (better)	1024 × 720 (37″), 1024 × 768 (42″)
HDR formats
HDR formats	None	None
Picture processing
Picture processing	Infinite Black filter with THX mode, ISF calibration controls and 2D-to-3D conversion.	TechRadar names V-Real 3 processing and 100 Hz anti-flicker processing for the exact 42-inch set. Panasonic's UK menus provide colour management, P-NR noise reduction and 3D-COMB for analogue signals; the 100 Hz marketing is not treated as native refresh.
Picture modes
Picture modes	–	Dynamic, Normal, Cinema and Eco; Eco adjusts picture settings for ambient lighting.
Motion handling
Motion handling	Intelligent Frame Creation and 24p Smooth Film are processing modes. AVForums observed artefacts with 50 Hz material on its review unit.	Panasonic lists 1080p/24, /50 and /60 as supported HDMI input signals, not as native panel refresh rates. TechRadar found camera pans stable; FlatpanelsHD observed a faint green phosphor trail while gaming.
Sizes
Sizes
Sizes	42″	37, 42″
Largest size
Largest size	42″	42″
Gaming
HDMI ports
HDMI ports	4 (0 HDMI 2.1 at 4K 120 Hz+)	3 (0 HDMI 2.1 at 4K 120 Hz+)
Variable refresh rate
Variable refresh rate	None	None
HDMI detail
HDMI detail	Four HDMI 1.4 inputs support 3D, Deep Colour and x.v.Colour; HDMI2 supports Audio Return Channel. Two SCART, component, composite and VGA inputs are also provided.	Three HDMI Type A inputs with VIERA Link HDAVI Control 3; HDMI1 accepts DVI-adapter video with separate analogue audio, while HDMI2 and HDMI3 accept digital audio only. Also two RGB SCART inputs, component video and D-sub PC input. The PC scan range is not a native panel refresh specification.
Smart TV and sound
Smart TV platform
Smart TV platform	VIERA CAST	None (no smart platform)
Processor
Processor	–	V-Real 3 (TechRadar)
Speakers
Speakers	20 W	20 W
Wi-Fi
Wi-Fi	Optional wireless LAN adaptor	–
Speaker detail
Speaker detail	Two 120 × 35 mm speakers, 10 W each, 20 W total.	Two 160 × 42 mm, 8-ohm speakers with 10 W + 10 W output at 10% THD.
Audio features
Audio features	Optical PCM and Dolby Digital output, analogue stereo output and a 3.5 mm headphone socket.	Analogue RCA stereo output and 3.5 mm headphone socket.
Software updates
Software updates	–	DVB software updates through broadcast; no internet smart platform.
Casting
Casting	VIERA CAST service portal and DLNA home-network playback; launch-era apps may no longer operate.	–
TV tuners
TV tuners	UK DVB-T/T2 terrestrial and DVB-S/S2 satellite for Freeview HD and Freesat HD, plus PAL I analogue.	UK DVB digital terrestrial tuner with EPG and PAL I analogue UHF reception; SD card slot displays photos.
USB
USB	Two USB 2.0 ports and SD card slot; USB HDD recording and media playback.	–
Ethernet
Ethernet	RJ45 10BASE-T/100BASE-TX for VIERA CAST and DLNA network media.	–
Optical audio out
Optical audio out	Fibre-optic digital audio output.	–
Design and power
Size
Size	Without pedestal: 1029 × 654 × 82 mm, 20.5 kg.	Panasonic TV-only dimensions, width × height × depth: 37-inch 917 × 617 × 95 mm, 22.5 kg; 42-inch 1020 × 679 × 95 mm, 26 kg. With pedestal: 37-inch 917 × 665 × 327 mm, 24.5 kg; 42-inch 1020 × 727 × 327 mm, 28 kg.
Stand
Stand	Included pedestal: 1029 × 693 × 308 mm, 23.5 kg with pedestal.	Pedestal ST-42R4-WG supplied. Wall brackets are optional.
Power use
Power use	Rated 335 W; standby 0.40 W or 32 W with monitor-out recording.	Panasonic average use: 235 W for 37-inch and 255 W for 42-inch. Standby is 0.7 W without monitor-output recording or 20 W with it.
Colours
Colours	–	Black surround with dark lower speaker panel.
In the box
In the box	Pedestal and remote. Contemporary UK reviews conflict on the number of bundled 3D glasses, so no quantity is asserted.	Pedestal ST-42R4-WG, N2QAYB000239 remote, two R6 batteries, two clampers, mains lead, cleaning cloth, instructions and guarantee documents. HDTVTest's reviewer had purchased a UK 42-inch set by 10 March 2008, but the first on-sale month remains unverified.