Tuesday, October 13, 2015

What is 4K Passthrough?

4K-Passthrough
Q: What is 4K passthrough? I see that newer AV receivers support it, but then I also see only one HDMI input that supports HDCP 2.2. Does this mean that 4K passthrough does not need HDCP 2.2? Doesn’t 4K require HDMI 2.0 and HDCP 2.2? Does that mean not all of the inputs support “true” 4K?

A: You’re not alone; this is a topic of much confusion. 4K passthrough is an AV receiver’s ability to accept a 4K video signal from a source device and pass it through to a 4K display. To pass a copy-protected 4K signal—which will include virtually all commercial 4K/UHD content for the home—the HDMI output of the source device must be connected to an HDMI input on the AVR that supports HDCP 2.2 copy protection. The AVR’s HDMI output is then connected to an HDMI input on the display, which must also support HDCP 2.2. In the example you cite, 4K passthrough would only work with the AVR’s one HDMI input that supports HDCP 2.2.
These days, it’s common for AVRs to have many HDMI inputs, only one or some of which  support HDCP 2.2—if there are any at all. When shopping for an AVR, be sure at least one input supports HDCP 2.2; if it has no such inputs, the signal from any upcoming Ultra HD Blu-ray player or 4K/UHD streaming device will not pass through the AVR and on to the display. This does not apply to the streaming apps within the display itself, which do not send any video signals via HDMI to the AVR. (They might send audio via the display’s optical output or HDMI Audio Return Channel, but that shouldn’t be a problem for HDCP 2.2.)
There are some related issues to consider when shopping for an AVR. For example, HDMI 2.0 can operate at a bitrate of 10.2 or 18 Gbps, and it’s usually not clear which bitrate is implemented in any HDMI 2.0-equipped device. At 10.2 Gbps, the connection can carry 2160p at 60 frames per second with no more than 4:2:0 color subsampling and 8-bit resolution, which is insufficient for high dynamic range (HDR). The lower bitrate can convey up to 12-bit resolution and 4:2:2 color subsampling at 30 and 24 frames per second, which is sufficient for HDR at these lower frame rates. Still, I strongly recommend getting an AVR that operates at the higher HDMI bitrate of 18 Gbps if possible, because that is more future-proof than the lower bitrate.
Another issue is HDR itself, which I believe is critically important for the future of video entertainment. To convey an HDR signal from a source device—say, an Ultra HD Blu-ray player or 4K/UHD streaming device—through an AVR and on to the display, all devices must have HDMI 2.0a connections. The “a” signifies that the connection can convey HDR metadata, which is required for an HDR display to properly reproduce HDR images.
However, keep in mind that just because HDMI 2.0a specifies this capability, that doesn’t mean a hardware manufacturer must implement it, even if the connection is identified as HDMI 2.0a. So be very careful about determining exactly what capabilities are actually implemented in a given product, not just what HDMI version number it uses. The version number represents the set of capabilities that can be implemented, not which ones are actually implemented.

source: avsforum.com

Monday, October 12, 2015

GoldenEar SuperCenter XXL Center Channel Speaker ‘First Look’


GoldenEar SuperCenter XXL Center Channel Speaker ‘First Look’ Highlights

If you are looking for the ultimate in center channel speaker, then your search is over. Consider the new flagship SuperCenter XXL Center Channel speaker from GoldenEar Technology. This amazing speaker continues the GoldenEar Technology legacy created by industry legend Sandy Gross. The SuperCenter XXL is a larger version of the GoldenEar SuperCenter XL Center Channel Speaker and uses the same signature High Velocity Folded Ribbon (HVFR) tweeter that is a core technology of the GoldenEar Technology family of speakers. The SuperCenter XXL contains one folded ribbon tweeter, four 5.25” cast-basket mid/bass drivers, two 6.75” x 8” Quadratic Planar Low-Frequency Radiators, and one 7” x 10” Quadratic Planar Low-Frequency Radiator. With three Quadratic Planar Radiators, the SuperCenter XXL is capable of bass extension down to 33 Hz and can effortlessly anchor the center stage of your home theater.
GoldenEar SuperCenter XXL Center Channel Speaker
GoldenEar SuperCenter XXL Center Channel Speaker Highlights Summary
  • The SuperCenter XXL is a perfect match for a larger home theater utilizing any of the Triton Series Tower Speakers.
  • Bass extension is deep and is the lowest in the SuperCenter series of center channel speakers.
  • The SuperCenter XXL offers exceptional clarity and imaging.
  • Paired with the Triton One Towers, the SuperCenter XXL delivers an immersive soundstage for both movies and multi-channel music.
Introduction to the GoldenEar SuperCenter XXL Center Channel Speaker ‘First Look’
One of the perks about being a reviewer is the chance to audition some amazing gear. I am currently working on a review of the GoldenEar Triton One Tower Speaker System used in a Dolby Atmos and Auro-3D home theater using a Marantz AV-8802 processor. Both reviews will be coming in the near future, but I wanted to provide this first look at the GoldenEar SuperCenter XXL Center Channel speaker. Sandy Gross called me a couple of weeks before the Triton One Towers arrived, and said that he was including something special for me with the review system. The SuperCenter XXL is a brand new speaker and is the big brother to the SuperCenter XL. The SuperCenter XXL is the largest speaker in the SuperCenter series of speakers and it has the lowest bass extension in the lineup. Sandy explained that his new creation would be a wonderful match for the Triton One Towers and he asked if I would include it in the system review. I was delighted to be the first person to get a review sample of this amazing center channel.

GOLDENEAR SUPERCENTER XXL CENTER CHANNEL SPEAKER ‘FIRST LOOK’ SPECIFICATIONS

  • Design: 2-1/2 way Ported (Passive Radiators)
  • Drivers: One – HVFR™ High-Velocity Folded Ribbon Tweeter; Four – 5.25? Cast-Basket Mid/Bass Drivers; Two – 6.75? x 8? Quadratic Planar Low-Frequency Radiators; One – 7? x 10? Quadratic Planar Low-Frequency Radiator
  • MFR: 33 Hz – 35 kHz
  • Efficiency: 91 dB
  • Dimensions: 5.75” H x 35” W x 11” D
  • Weight: 31 Pounds
  • MSRP: $1,249.99 USD
  • GoldenEar
  • SECRETS Tags: GoldenEar, GoldenEar SuperCenter XXL, GoldenEar Center Channel, Triton Series
The SuperCenter XXL contains one High Velocity Folded Ribbon (HVFR) tweeter, four 5.25” cast-basket mid/bass drivers, two 6.75” x 8” Quadratic Planar Low-Frequency Radiators, and one 7” x 10” Quadratic Planar Low-Frequency Radiator. The speaker itself shares the SuperCenter design aesthetic with rounded edges and glossy end-caps. The SuperCenter XXL is a substantial speaker yet its design doesn’t dominate the listening space. Installation is very simple and GoldenEar recommends placing the speaker above or below ear-level with the speaker angled toward the listening position using the adjustable feet that are included with the speaker.
The internal design of the SuperCenter XXL is impressive. There are three separate internal chambers inside the speaker. The first chamber contains two of the 5.25” drivers and the HVFR Tweeter which are coupled to the large 7” x 10” Quadratic Planar Low-Frequency Radiator in the center of the speaker. The two smaller chambers on each side of the speaker contain a special 5.25” driver which is engineered for low frequency response up to 500 Hz. Each of those drivers is coupled to one of the smaller 6.75” x 8” Quadratic Planar Low-Frequency Radiators. One of the biggest pluses that the larger cabinet and extra drivers deliver relative to the SuperCenter XL, is dramatically improved dynamics and impact, especially in the range below 500 Hz.
I expected the SuperCenter XXL to sound pretty amazing and I wasn’t disappointed.
Impressions
GoldenEar SuperCenter XXL Center Channel Speaker
As we all know, the center channel speaker is crucial in helping to recreate the theater experience. So much of the critical dialog in movies comes from the center channel, that the viewing and listening experience hinges on how well we can hear that dialog in the movie. A great example of this is “The Grand Budapest Hotel” which tells the story of a famous hotel and the friendship between its concierge and Zero, the lobby boy. I loved the dialog between F. Murray Abraham and Jude Law in the dining room at the hotel. The SuperCenter XXL reproduced the actors’ dialog with exceptional clarity and easily revealed nuances and emotions in their voices. Instead of just watching the dialog from my sofa, the SuperCenter XXL put me at the table in their conversation. The echo of the cork popping from their champagne bottle reverberated through my listening room as the SuperCenter XXL blended beautifully with the Triton One Towers creating the illusion of being in the cavernous dining hall with them.
Music is also very central to the story of “The Grand Budapest Hotel” and the experience starts right from the music playing on the Blu-ray title menu. I had to stop and think about the last time I even made note of the music on a title menu, and in this case it was so striking that I had to hesitate before playing the movie just to enjoy the experience. The SuperCenter XXL created a totally seamless soundstage across the entire front of my listening room. The music was gorgeous with intricately layered vocal harmonies and the bass vocals sounded especially rich. The music throughout the film sounded no less impressive and the SuperCenter XXL brought the gorgeous balalaika music to life with exquisite bass and vibrant strings that played harmoniously with the Triton Ones.
The biggest takeaway for me with the SuperCenter XXL was its ability to produce sound with such clarity that I forgot that I was listening to a speaker. While I have traditionally listened to my favorite shows like “The Big Bang Theory” in stereo, I found that listening in Dolby Surround with the SuperCenter XXL brought me closer to the characters than ever before since the dialog was focused so clearly in the center of the listening space.
If my initial impressions are any indication, GoldenEar Technology has yet another winner on their hands. The SuperCenter XXL is easily one of the best center channel speakers available today. If you are looking for new speakers or looking to upgrade your GoldenEar Technology speaker system, you should absolutely consider adding the SuperCenter XXL Center channel speaker to your home theater.

source: hometheaterhifi.com

Sunday, October 11, 2015

Japan Display prezintă viitorul monitoarelor: rezoluţie 8K şi frecvenţă ridicată


   Rezoluţia 4K încă nu este norma pentru monitoare sau televizoare, însă deja multe companii aspiră către viitor. Următoarea rezoluţie de înaltă fidelitate va fi 8K, care oferă de patru ori mai mulţi pixeli decât 4K. Japan Display a dezvăluit că a reuşit să realizeze un monitor de 17” cu rezoluţie 8K, care oferă în acelaşi timp o frecvenţă a cadrelor de 120 Hz. Desigur, este vorba despe un simplu concept, un astfel de monitor fiind departe de a ajunge pe birourile utilizatorilor.
   Specificaţiile acestui monitor sunt cu mult peste ceea ce există în acest moment pe piaţă. Deşi încă nu există pe piaţă monitoare 4K cu frecvenţă de 120 Hz, monitorul de la Japan Display reuşeşte să afişeze o rezoluţie mai mare cu imagini mult mai rapide. În acelaşi timp, toţi aceşti pixeli (33 milioane) sunt îngrămădiţi pe un panou cu diagonala de 17”, ceea ce sugerează o densitate de 510 ppi (pixeli per inch), o valoare mai mare decât cea pe care o găsim pe smartphone-urile de top din zilele noastre. În acelaşi timp, acest prototip de display oferă un raport de contrast de 2000:1 şi luminozitate de 500 candele pe metru pătrat, fiind comparabil cu modele de top ale monitoarelor de pe piaţă.
   
   Din păcate însă, este destul de clar că nu vom putea folosi un asemenea monitor prea curând. În acest moment, plăcile video pentru PC pot afişa maxim 5120 x 2880 pixeli, iar majoritatea se opresc la rezoluţia 4K cu frecvenţă a cadrelor de 60 Hz. Pentru a putea scoate semnal 8K la 120 Hz ar fi necesară o soluţie multi-GPU din următoarea generaţie de plăci video şi un nou standard pentru cabluri, care să poată oferi lăţimea de bandă necesară transferului de semnal video. 

source: go4it.ro