Can 4K Ultra High Definition Blu-ray follow? Are you ready?

4K ultra high definition is not uncommon nowadays. Many devices such as TVs, projectors, cameras, camcorders, camcorders, monitors, AV receivers, and network streaming media in the consumer and professional electronics fields are keeping pace with the times. Improve the metrics to this standard. In order to catch up with this trend, the Blu-ray of the packaging media immediately joined the 4K family. For a time, the 4K that swept the market was over Full-HD Full HD.
Since the 4K Ultra HD Blu-ray (4K Ultra HD Blu-ray) format was just announced in 2015, the number of discs and models on the market for discs and players is not yet on the market, so the degree of awareness and patronage will naturally not be too high. At the same time, all doubts arising from it must also exist, and no less. For this reason, I would like to share a 4K ultra high-definition Blu-ray with everyone by solving questions and answering questions, which will help us to better choose, use and appreciate it.

4K ultra-high-definition Blu-ray is better than ordinary Blu-ray?
4K Ultra High Definition Blu-ray Format was officially announced by the Blu-ray Disc Association (BDA) Blu-ray Disc Association on May 12, 2015. The official logo and specific parameters were announced at the same time. The 4K Ultra High Definition Blu-ray Disc player was created during the Christmas of 2015. Started to enter the market. Unlike conventional DVDs and ordinary Blu-rays, 4K Ultra High Definition Blu-ray does not have regional codes, which means that because there is no regional playback restriction, 4K Ultra High Definition Blu-ray Discs can be played on any 4K Ultra High Definition Blu-ray Disc player. 4K ultra-high-definition Blu-ray disc capacity has three specifications: the first is a dual-layer 50GB capacity 82Mbit/s; the second is a double 66GB capacity 108Mbit/s; the third is a three-layer 100GB capacity 128Mbit/s, while the ordinary Blu-ray It is single-layer 25GB, double-layer 50GB and three-layer 100GB, and the peak bit rate is only 40Mbit/s. In addition to the clarity (resolution: 3840 × 2160) 4 times that of ordinary full-HD Blu-ray, 4K ultra-high-definition Blu-ray still differs from ordinary Blu-ray in many aspects such as “color, codec, frame rate, and high dynamic characteristics”. Some are significantly better than or advanced to ordinary blue light.
In terms of color, 4K ultra-high-definition blue light refers to the Rec.2020 (or BT.2020) standard with a wider color gamut and 10 bit color depth, instead of the normal Blu-ray Rec.709 and 8 bit color depth, resulting in The hue more natural and realistic picture, a wider variety of colors, and the three-dimensional screen resolution to improve the color transition smoother visual effects.

In the encoding and decoding mode, 4K Ultra High Definition Blu-ray adopts more advanced H.265/HEVC (High Efficiency Video Coding) high-efficiency video coding instead of ordinary Blu-ray H.264/AVC (Advanced Video Coding), which significantly improves The relationship between data transmission rate, coding quality, delay and algorithmic complexity has been optimized to provide the basis for the original reproduction of the source. In terms of frame rate, 4K Ultra High Definition Blu-ray has added 4K/60Hz or 4K/50Hz with a higher frame rate (HFR) than the normal Blu-ray single 24Hz frame rate. This increase in number undoubtedly enables fast moving images. The flicker phenomenon is reduced to a minimum and the screen display is smoother.
In terms of dynamic contrast characteristics, 4K ultra-high-definition blue light adds HDR (High Dynamic Range) high-dynamic-range content display capabilities in addition to the standard dynamic range (SDR) dynamic range, rather than the normal SDR standard dynamic range content of ordinary Blu-ray content. Display ability. This ability to significantly widen the contrast between bright and dark makes the details of the bright and dark parts of the image fully exhibited.


4K ultra high definition Blu-ray how compatible with the disc?

With the development of science and technology, CDs as packaging media continue to introduce new formats. Developers of optical disc formats generally consider future generations to be compatible with their predecessors, and 4K ultra-high-definition Blu-ray will be the same, in order to facilitate the consumer's collection of different historical discs can still be fully enjoyed. Therefore, the 4K Ultra High Definition Blu-ray Disc player can be compatible with current common Blu-ray (including 3D Blu-ray), DVD, SACD, DVD-Audio, the earliest CD, and Redbook CDs. In order to allow users to have better full-spectrum Blu-ray and DVD viewing, 4K Ultra HD Blu-ray can increase the resolution up to 4K.
On the other hand, the 4K ultra high definition Blu-ray player also has the ability to downscale the 4K resolution of ultra-high definition Blu-ray discs to 1080p full HD, so that 4K ultra-high definition Blu-ray discs can be displayed normally on 1080p full HD TVs or monitors. However, in view of the fact that the 4K Ultra High Definition Blu-ray as mentioned above has a lot of differences in parameter specifications from the current general Blu-ray, the version of the HDMI output terminal is also required to be higher, and therefore it is desired to play the 4K Ultra High Definition Blu-ray Disc smoothly and obtain all its excellence. Features, enjoy the genuine new experience it offers in terms of audio and video. It is a must to buy a new 4K ultra high definition Blu-ray player. Today's ordinary Blu-ray players cannot play 4K ultra-high definition Blu-ray discs.

4K Ultra High Definition Blu-ray What are the requirements for display devices?
To make the inherent characteristics of 4K ultra-high-definition Blu-ray perfectly presented, in addition to the necessary 4K ultra-high-definition Blu-ray player, there are certain technical requirements for display devices such as televisions, monitors, or 4K ultra-high-definition Blu-ray outstanding dynamic range and exquisite The color performance cannot be enjoyed by the viewer. For this reason, in order to fully display the visual effects of HDR high dynamics and WCG wide color gamut content contained in 4K Ultra High Definition Blu-ray Disc, the connected TV or monitor must have the ability to generate and display new colors, as well as handle With the ability to display high dynamic content. In 2014, some models such as Sony and Panasonic did not usually have this capability. Only the high-end models introduced in 2015, and some devices that use a new generation of light sources and display methods have such capabilities. It is worth noting that any TV or monitor with a 4K Ultra HD Premium Logo logo can perfectly demonstrate the excellent features provided by 4K Ultra HD Blu-ray.
Broadly speaking, any 4K ultra high-definition TV or monitor can be used for 4K ultra-high-definition Blu-ray discs, including older models with HDMI 1.4 input only, but the user's audiovisual experience is different. When a 4K ultra high definition Blu-ray player is connected to a television or a display via an HDMI interface, the player can determine whether the connected display device has the ability to display 4K ultra-high-definition Blu-ray content, and can perform corresponding processing according to specific circumstances. If the decision is made, the user can get real high-quality enjoyment from the advantages of 4K ultra-high-definition blue light in image and color; if not, it does not matter. The compatibility of ultra-high-definition Blu-ray makes the content still display, and the user can still display the content. Normal viewing, but the visual effect is subject to some restrictions, the picture quality is not so sharp saturated, the color is not so vivid and vivid. However, to say that, even if the display device with the HDMI input interface version 1.4 can be used normally, but the visual effect of updating the display device will be better.

Does 4K Ultra High Definition Blu-ray need to be updated synchronously with the AV receiver?
This depends on the specific configuration of the user's existing system. Let's talk about the AV amplifier, whether the amplifier is suitable, need not be updated, which is somewhat similar to the status of the display device. Although the old AV receiver models with HDMI 1.4 interface can to some extent support the transmission of 4K video, it does not support the ability to handle HDR high dynamic and WCG wide color gamut signals. In other words, users still cannot Enjoy the image and color effects of 4K Ultra High Definition Blu-ray as you wish. Even if the user's existing AV receiver has an HDMI 2.0 interface that can transmit HDMI 2.0 signals, it still cannot transmit HDR signals. The joy is that users can use the firmware of the manufacturer to upgrade and compatible with HDMI 2.0a in the future to support HDR content transmission. However, this also depends on the specific implementation of HDCP (High DefinitionCopy Protection) 2.2 HD content copyright protection. In addition, 4K ultra high definition Blu-ray Disc may use the latest Dolby Atmos, DTS:X surround sound system, or Auro-3D cinema 3D sound effects on the audio content, which requires the receiver to have the ability to process these signals. One of the main reasons for updating the receiver. Otherwise, the 4K ultra high definition Blu-ray player is purchased, and there are also suitable display devices. Without the corresponding AV receiver processing and relaying the 4K ultra-high-definition signal, all preparations will be abandoned before reaching the expected value. effect. As for the HDMI cable for connection, if the original cable is already a high-speed HDMI specification, it does not need to be replaced. If not, it must be purchased again. Only the display device and AV receiver adopt the 2.0a version of the HDMI interface, and the HDR high-dynamic image in the 4K ultra-high-definition Blu-ray disc can be presented smoothly.
4K Ultra High Definition Blu-ray What are the characteristics of the audio?
What are the advantages of 4K Ultra HD Blu-ray and 4K streaming media?
4K Ultra High Definition Blu-ray on the distribution of the CD and player?

I'll tell you tomorrow.

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