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The principle
The topology and devices used to achieve the excellent sound and picture
quality of the DVD32R were selected after constructing and evaluating many
prototypes. Each prototype under went extensive laboratory, listening and
viewing tests to fine tune and compare the options. The final characteristics
were optimised by cross-referencing with experience built up over endless
hours of testing TAG McLaren's audio products.
High-mass Transport for Low Jitter
The DVD32R is one of the very few DVD players in the world to use a top
loading transport. This approach has been associated for many years with
the very best CD players. It allows a more stable platform for the laser
assembly which eases the demands on the servo control electronics and their
power supplies which in turn improves data integrity and reduces jitter.
These lessons learnt apply even more to the higher density, very fast spinning
DVD.
The DVD32R's drive motor and servo electronics are mounted to a purpose
built aluminium sub-chassis, which has been mass loaded by carefully placed
lead. The resulting assembly weighs almost 1 kg, and is supported on carefully
selected damping isolation bushes for further mechanical decoupling. The
entire drive assembly is in a sub-enclosure for electrical screening which
in turn is rigidly fixed to a solid 3 mm aluminium plate. A servo control
and data recovery printed circuit board (which receives its clock from the
main pcb via a dedicated coaxial link) is attached to the sub-enclosure
as close as possible to the dual wavelength laser assembly, screened by
a metal plate. The data is serialised and sent to the MPEG decoder on the
main pcb. Automatic, Adaptive
Drawer Mechanism
Many hi-end top-loading constructions have manual open/close operation
which seems incompatible and inconvenient with a high cost product. The
DVD32R aluminium diecast drawer door runs on a polished steel bar and
a Teflon glider, driven by an electric motor via a steel wire. The torque
of the motor is progressively adapted by the control software to achieve
perfect and consistent performance over temperature and age.
Convenient Disc Changing in the Dark
When the drawer opens it activates an array of blue LEDs inside the drawer
to assist placing a disc which is beneficial in a home cinema environment.
The light is switched off during play to prevent potential interference.
Precise Clock for best Sound
and Video Quality
Accurate extraction of the disc's audio and video data demands precise
clocks. The low phase noise single frequency master oscillator in the
DVD32R ensures that all video and audio clocks are synchronous to avoid
the undesired effects of 'beating'. All required clock frequencies are
derived from this master clock using a phase locked loop and two voltage
controlled oscillators. The clock signals are transferred across the PCB
using independently buffered and precisely terminated clock traces to
each of the circuits. This prevents decision threshold uncertainty which
would introduce jitter. The result is purer sound and a more precise picture.
The MPEG Decoder from the Experts
MPEG decoding is at the core of a DVD player. TAG McLaren Audio worked
closely with National Semiconductor's field-leading subsidiary Mediamatics,
in finding the best MPEG decoder solution. After long evaluation Pantera-DVD¢â,
the first IC to integrate all back-end functions of a DVD player onto
a single chip, was selected. This unrivalled level of integration, which
includes host processing, a 32-bit RISC processor, MPEG specific hardware,
10-bit video DACs and the NTSC and PAL encoders, provides the DVD32R with
a no-compromise MPEG decoder solution.
Uncompromised Video quality
The video circuitry within the DVD32R uses broadcast quality components
along its entire signal paths. The video outputs are individually buffered
by high speed current-feedback op-amps. Besides two Composite and two
S Video outputs, two sets of Component video outputs are provided, one
using RCA Phono, the other broadcast quality BNC connectors. For best
Component video quality S Video and Composite are switched off, except
when an on-screen graphic is presented by the software.
Crisp On-screen Display (OSD)
The video processing elements include vertical filtering and an anti-flicker
filter to also deliver high quality graphics display. The full-resolution
on-screen display is produced by an integrated digital domain OSD generator,
avoiding any superfluous circuitry in the analog video paths. The result
is uncompromised picture quality.
Test-Pattern generator
The picture from the DVD32R can only be as good as your display device
allows. The DVD32R includes software-driven test-patterns and hardware
test circuitry to assist in calibrating the display device for best brightness,
contrast, colour, tint, sharpness, convergence and geometry setting.
Advanced Digital Waveform Control for
Better Digital Data Transmission
One would expect that a perfect digital signal is a so called square wave
with very fast rise and fall times at the zero crossing points, but this
would require digital interconnects with an infinite bandwidth and would
make it impossible to prevent signal reflections and interference, degrading
the quality of the digital signal and hence the sound. It is important
to keep the signal bandwidth to a minimum, whilst maintaining accurate
transitions of the data edges through the zero crossing point. The DVD32R
incorporates advanced circuitry which reduces rise and fall times whilst
preventing waveform discontinuities, the result is a reduced bandwidth
and less demand on the digital interconnects.
Discrete, independent Digital Audio Drivers for perfect decoupling
The DVD32R uses, for added sonic perfection, two separate, discrete drivers,
tightly controlled in their output impedance to 75 ohms, for each of its
two coaxial digital audio data outputs. This not only ensures complete
isolation between the outputs but also that any reflections occurring
at the receiving end, due to an impedance mismatch, are not re-reflected
back from the DVD32R.
TAGtronic Synchronisation Link T2L
for Reduced Jitter
When the DVD32R and AV32R are used together, the TAGtronic Synch. Link
T2L produces a tighter, cleaner and more controlled sound. T2L allows
the AV32R to fix its clock to provide a low noise, ultra low jitter reference
right next to its audio DACs, where it needs to be for optimum sound quality.
Locking the AV32R's clock requires the DVD32R to synchronise its clocks
to the AV32R, which is done through the TAGtronic Synch. Link. The DVD32R
provides both a T2L input and output connection to permit easy daisy-chaining
of further digital sources with T2L capability, such as the TAG McLaren
CD transport CDT20R.
Massive Power Reserves
Despite its low power consumption the DVD32R uses a large toroidal transformer
as this has the benefit of a very low stray magnetic field, reducing the
possibility of interference with the audio data and video signals. The
transformer is also very quiet, reducing hum to an inaudible level.
Convenience without Penalty: Low Standby
Power
The DVD32R includes a second, smaller transformer to power the remote
control and micro-controller circuitry. This results in very low electrical
consumption (<3W) when the DVD32R is switched to standby whilst allowing
full remote control.
Best Decoupling between Building Blocks
To reduce interference between the processing, digital data and analog
video sections they have separate power supplies, right down to having
eight separate secondary windings on the transformer.
Multi-Layer Printed Circuit Boards for Improved Signal Integrity
The DVD32R's multi-layer printed circuit boards control the complex pattern
of return currents, provide controlled impedances and minimise coupling
better than a conventional circuit board could ever do. The result is
better signal to noise, reflected in crisper pictures and sound.
Mixed Technology Construction-the Best
of both Worlds
Performance is optimised using surface mount components for fast digital
transfer and leaded components for perfect analog signals whilst perfect
manufacturing quality is achieved using a combination of inert-gas reflow
and wave soldering techniques.
The TAGtronic Communication Bus for
System Integration
The DVD32R features the TAGtronic Communication Bus. This allows TAG McLaren
Audio units to work seamlessly together to form an effective, integrated
system. Remote control codes can be transferred over the bus, allowing
system components to be operated out of sight. The DVD32R can even switch
your complete TAG McLaren home cinema system into standby.
Multi-room Expansion
The TAGtronic Bus will allow the system to be extended to offer multi-room
capability in which the output from sources can be controlled and redirected
throughout a home.
TAG McLaren has successfully demonstrated that upgradability is a reality.
The DVD32R follows this tradition:
New Features
All of the DVD32R software is kept in re-programmable, FLASH memory. This
is a significant advantage over players which, for cost reasons, cannot
offer field re-programmability. Software upgrades allow the DVD32R to
support new features and formats, all that is required is to download
upgrades from the TAG McLaren Audio website using a PC and a TAGtronic
Programming cable. DVD-Audio
TAG McLaren is continuously observing the market to look for abilities
to improve their products. One of the most promising new formats is DVD-Audio.
TAG McLaren is working, in close relationship with Mediamatics, on the
hardware and software implementation of this fascinating new format. The
DVD32R is upgradable to DVD-Audio as soon as this standard is fully specified.
The transport is already capable to read DVD-Audio discs but no hardware
or software processing has been added to the DVD32R due to many unspecified
features of the standard (copy protection, high quality digital output
format).
Progressive Scan Video
The DVD32R hardware can be upgraded to progressive scan for NTSC and PAL.
Digital Video Output
Pending copy protection issues and international standardisation, the
DVD32R is hardware upgradable to a digital video output. A suitable TV/projector
will be necessary to accept and process this new digital signal.
¾÷±×·¡ÀÌµå °æ·Î
DVD32RÀº ¾÷±×·¡À̵尡 °¡´ÉÇϸç, Progressive Scan, Digital Video µîÀÇ Çϵå¿þ¾î ¾÷±×·¡À̵带 ¹ÞÀ»
¼ö ÀÖµµ·Ï Â¥¿©Á® ÀÖÀ¸¸ç, ±â´ÉÀûÀÎ Çâ»óÀº TAG McLaren'sÀÇ À¥»çÀÌÆ®¸¦ ÅëÇÏ¿© ¾÷±×·¡ÀÌµå °¡´ÉÇÕ´Ï´Ù. ¶ÇÇÑ Áý¿¡¼ PC¸¦
»ç¿ëÇÏ¿© ½±°í °£ÆíÇÏ°Ô ¼ÒÇÁÆ®¿þ¾î¸¦ ¾÷±×·¡ÀÌµå ¹ÞÀ» ¼öµµ ÀÖ½À´Ï´Ù. ¶ÇÇÑ DVD-Audio³ª SACD µîÀÇ Â÷¼¼´ë À½¾ÇÆ÷¸ËÀ»
Áö¿øÀ» À§ÇÑ IEEE1394 ÀÎÅÍÆäÀ̽º ÀåÂøÀ» À§ÇÑ ¿©À¯°ø°£ ¸¶·ÃµÇ¾î ÀÖ´Ù.
DVD32R ¿É¼Ç
The Progressive Scan Module PSM192
+ DVI
Åױ׸ƶó·»ÀÇ ÇÏÀο£µå ÇÁ·Î±×·¹½Ãºê ¸ðµâ
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The PSM192 de-interlaces all your video
sources! ...why only enhance DVDs?
Progressive Scan or De-interlacing, i.e. the generation of a picture
which is progressively scanned every 1/50s (NTSC: 1/60) from top
to bottom, has recently become popular in the context of the latest
DVD player technology.
Progressive Scan provides significant picture enhancement, but
should not be limited to DVD. Why not use a general purpose Progressive
Scan Module, like the PSM192, instead, to de-interlace all your
video sources? TV, VCR, Laserdisc, video camera, satellite receiver
etc. will all improve, just like your DVD!
Interlacing, i.e. splitting a picture into two fields of half the
line count, which in PAL transmissions are sent 1/50 (NTSC: 1/60)
seconds apart, leads to reduced vertical picture resolution and
flicker. Unfortunately, just 'gluing¡¯ those fields together afterwards
isn't that simple.
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Progressive Scan results in better
vertical picture resolution, reduced motion artefacts and reduced
flicker, making us wonder how we could ever have lived without it.
Two of the very latest Plasma screens from different
manufacturers were therefore pulled into our laboratory for analysis.
The tests were: firstly feed the screens with ¡®standard¡¯ interlaced
video, therefore using the Plasmas' internal Progressive Scan modules
and scalers, secondly feed the screens from the output of the PSM192,
installed in a DVD32R.
Before undertaking this experiment we were sceptical about the outcome,
thinking that Plasma technology should have
progressed nicely, leaving very little else to offer. However, comparing
the picture quality of these two 42" Plasmas left me surprised:
the pictures couldn't be more different, whether interlaced or de-interlaced.
Feeding the very same signal resulted in significantly different pictures,
proving that video technology surely hasn¡¯t reached ¡®Picture Perfect¡¯
yet.
Acknowledging the fact that the picture quality differences between
Plasmas of different manufacturers are still huge, we focussed on
the performance of the Plasmas¡¯ internal de-interlacer compared to
the PSM192 installed in the DVD32R. It wasn¡¯t difficult to see the
differences, Silicon Image¡¯s latest technology in the PSM192 showed
clear gains, resulting in a picture which was crisper, showing sharper
details and reduced motion artefacts.
Should
this really surprise us? Display technologies are expensive, savings
on ultimate picture quality versus screen size are all important
and if you haven¡¯t seen what is possible, you might not even know
what you are missing. In a very competitive market, such as display
technology, adding a six layer, highly integrated and powerful Progressive
Scan Module, such as the PSM192, is commercially just not viable
- not for the display manufacturer!
If you have a DVD32R or DVD32FLR, of
whatever specification, then you can have it upgraded with the Progressive
Scan Module PSM192, improving picture quality of DVDs and all your
Composite and S-Video sources.
The upgrade requires the DVD32R / DVD32FLR
to come back to us, as we will update the chassis and rewire the
DVD32R's multi-layer printed circuit board before installing the
six-layer PSM192 board. All this requires special tools and skills!
The upgrade will take about two working
weeks, not counting shipping times, and is covered by your standard
DVD32R / DVD32FLR¡¯s product warranty.
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[Á¦Ç°»ç¾ç] |
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technical specifications |
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