4K HDR+ Panoramic Sound New ATV is your AV Plaything?

Real 4K decoding output, dual HDR format support, support for panoramic sound, even if force majeure, do you feel 4K machine? In the era of mobile devices being king, I believe that most people nowadays have a different attitude toward TV sets than before, because some people almost have little sense of the TV. Although some people still own televisions, only some people have 4K televisions, and most of them still stay in the 1080p era. From this point of view, in fact, set-top box products, although most of the friends still choose to purchase products advertised as 4K, they are actually of little use. However, 4K TVs are now much cheaper than before and 4K displays are becoming more and more popular. In keeping with this trend, Apple has also introduced new Apple TV 4K products. Perhaps it can be said that as a 4K TV box, Apple TV 4K should be one of the most expensive. The Hong Kong version needs to start at 1388 (about RMB 1173). The key point is that it is not very practical in mainland China. Even so, Cook repeatedly stressed that Apple TV is the future of television, and claimed that 4K HDR is the next generation of video standards. Of course, the slogan "Apple TV is the future of television" may not be practical for us at present. What does "4K HDR" mean to us without considering the future of television? Today, let's talk about the 4K HDR upgrade for Apple TV is not what you want for a small number of users who have already purchased 4K TVs.

Apple TV finally broke into 4K

If you are a fan interested in the concept of AV home theater, Apple TV 4K is enough to meet your expectations for 4K, especially the latest technology that has just been upgraded, and the vast majority of technologies have met the industry's new generation of 4K Ultra High Definition Blu-ray ( Ultra HD Blu-ray) standard. To put it simply, many 4K Blu-ray players that are selling at a price of 45,000 or even 40,000 today are very expensive. Many professional features of Apple TV 4K are also capable and more. AV enthusiasts should all know that a set of qualified real 4K systems, the "true 4K content + true 4K player + true 4K TV" are the most basic conditions. First of all, "true 4K content", in fact, according to the Blu-ray Association released standards, Ultra HD Blu-ray content standards will include 4K resolution of 3840 x 2160 pixels, H.265 encoding, wide color gamut (up to Rec.2020 Standard), high dynamic range (HDR), and high frame rate (60fps) requirements.

For a qualified qualified “true 4K player”, it is necessary to first support hard-to-get 4K HEVC/H.265 video, at least HDMI 2.0 standard interface with 4K resolution transmission bandwidth, and in order to meet the current LAN playback The market demand should be equipped with a Gigabit Ethernet port or USB 3.0/3.1 interface. As for the "True 4K TVs", in addition to the corresponding HDMI 2.0 interface, the display panel resolution should reach 4K, a wide color gamut, and sufficient brightness should be provided to ensure that the latest HDR formats are perfectly supported. In the three "true 4K" requirements, Apple TV 4K is responsible for the "true 4K" player.

True 4K decoded output

Apple officials stated that the new Apple TV 4K is equipped with the A10X Fusion chip, which is the same chip that the iPad Pro uses, and its strong GPU performance has brought a more powerful and immersive 4K HDR viewing experience. Based on the parameter information, Apple TV 4K already supports 2160p resolution output and supports two major HDR high dynamic range formats: Dolby Vision and HDR10. More specifically, in video decoding, Apple TV 4K not only supports H.264/HEVC SDR video for hard solutions 2016p, 60fps, Main/Main 10, but also for 2160p HEVC Dolby Vision (Profile 5)/HDR10 (Main 10 profile). ) The video is not to mention.

At the same time, on the output of the interface, Apple TV 4K also provides an HDMI 2.0a interface that meets 4K transmission, which corresponds to the interface of 4K TV and can output up to 4K@60Hz HDR video, which is four times higher than that of 1080p. The final picture is clearer and sharper. Not only that, Apple TV 4K is also a high-performance 4K video converter that enables 10180p HD content to maintain ultra-high resolution output on 4K TVs, similar to the common multiplier function. Of course, keeping 4K high-resolution output by default may not be desirable for AV enthusiasts.

Because the default is 4K HDR 60Hz output, if the original video supports 24 frames of video capture and the output is upconverted to a 4K HDR 60Hz TV, then the source image conversion will be terrible. After all, the color gamut is enlarged and the brightness range is pulled. Extending, the details are also the result of the conversion multiplier, the frame rate has also been adjusted, in short, after processing is not only the original video, and the picture may be very terrible, the color may even show a bit unnatural.

To tell the truth, there is one more noteworthy detail about Apple TV 4K, and it was this detail that made it fit the "true 4K" standard. That is, compared to the previous generation of Fast Ethernet, Apple TV 4K has been upgraded to a Gigabit Ethernet interface to ensure adequate transmission of 4K video, and can be directly inserted into a Gigabit Ethernet cable to connect home media services to play local area network. 4K video.

Support dual HDR format

Thanks to powerful decoding capabilities and HDMI 2.0a interface, Apple TV 4K also meets the need for HDR format transmission, which is a great boon for home theater enthusiasts. HDR is a technology that comes with 4K. It can make the screen display more effective under the premise of high resolution. In short, the ultimate goal of HDR technology is to enhance color effects, increase moving details, improve contrast, and make the picture more realistic. The dynamic range of the human eye is very wide, and HDR is to make the picture closer to the real effect seen by human eyes. The current mainstream HDR has two formats, HDR 10 and DolbyVision (Dolby Vision), and Apple TV 4K. HDR 10 is relatively common. It only requires that the movie or program content be based on HDR production. Once the HDR effect is played from the beginning, it will be presented according to the established form. During the playback process, no adjustments or changes will be made to the picture. Therefore, the HDR 10 is different. There will be significant differences in device playback.

To put it simply, 5 different 4K TVs play the same HDR 10 content, and the contrast between them looks different. As another extension to the standard HDR, the Dolby Vision technology is different, completely controlling the entire process from the camera to the 4K TV. Not only inserts information in the video to control the playback effect, but also requires the display device, such as with a dedicated chip, to check the display device's optimal output performance, including precise control of the brightness and color space, and then the signal source will be frame by frame based on these display device data. Optimized output not only takes into account the capabilities of the display device, but also preserves the original signal's intent. So playing DolbyVision content on 5 different 4K TVs can also be self-adaptively adjusted to ensure almost consistent display, including color and skin tone.

HDR 10 is open source, and DolbyVision can be seen as a richer, more advanced version of HDR 10. It should be noted that the HDR10 only supports 10-bit color depth, and DolbyVision up to 12-bit, so it is clear that Dolby Vision is more in-depth and more advantageous, even if the display device's peak brightness is limited, it can automatically adjust to render Delicate details of bright and dark areas.

Supports next-generation surround sound

Admittedly, 4K HDR is a new generation video format, but in the last two years, next-generation surround sound audio formats have now become the standard for most new blockbuster movies, especially Dolby Atmos. Apple officials stated that Apple TV 4K can obtain Dolby Atmos panorama support through the upgrade of tvOS software and bring more three-dimensional effects to movies and television programs. Dolby Atmos Dolby Pan sound is one of the most advanced audio technologies in home theater today, helping to provide more stereoscopic surround effects.

Simply put, in addition to the four-way speakers that can make sounds based on the content of the movie, Dolby Panorama sound can also make the speakers set on the head also make sounds, so that the sound effects of the entire space is more powerful and more realistic. Imagine that when you were watching a movie, there were planes flying. At this time, you could feel that the sound of the plane seemed to drift over your head and be there.

Is this the 4K box you want?

For Apple TV 4K, Apple has been promoting online 4K HDR content, claiming that users can watch 4K HDR content on iTunes in a variety of styles, shocking 4K HDR movies, and other popular video platforms such as Amazon, Netflix, and not Allows users to download 4K content.

In fact, aside from the online 4K content that cannot be used in mainland China, for AV enthusiasts, this hardware has been upgraded to Apple TV 4K, which can be regarded as a very good 4K local playback. Device.

Of course, Apple TV 4K has a lot of space to play, which is part of Apple's ecology. But as far as the 4K HDR is upgraded, is this already the 4K box you want?

Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, TV boxes, smart TVs, smart TV software, etc. Answering questions.

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