What is Progressive Scan DVD Player?

HD DVD players include digital streaming media players, Blu-ray players and HDTV DVD players.

HD DVD player

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High-definition DVD players include digital streaming media players, Blu-ray players and HDTV DVD players.

What is HD:

High-definition, "High Definition" in English, meaning "high-resolution". Generally speaking, high definition has four meanings: high definition television, high definition equipment, high definition format, and high definition movie.

HDTV:

High-definition television, also called "HDTV", is a high-definition television standard format determined by the American Society of Motion Picture and Television Engineers. Generally speaking, HD refers to HDTV. The definition of television is measured by the number of horizontal scanning lines. Here are several common TV scan formats:

D1 is 480i format, with the same definition as NTSC analog TV, 525 vertical scanning lines, 483 visible vertical scanning lines, 4: 3 or 16: 9, interlaced / 60Hz, line frequency is 15.25KHz.

D2 is 480P format, same specifications as progressive scan DVD, 525 vertical scan lines, 480 visible vertical scan lines, 4: 3 or 16: 9, resolution is 640 × 480, progressive / 60Hz, line frequency is 31.5 KHz.

D3 is a 1080i format, which is a standard digital TV display mode, with 1125 vertical scanning lines, 1080 visible vertical scanning lines, 16: 9, resolution of 1920 × 1080, interlaced / 60Hz, and line frequency of 33.75KHz.

D4 is a 720p format, which is a standard digital TV display mode, with 750 vertical scanning lines, 720 visible vertical scanning lines, 16: 9, resolution of 1280 × 720, progressive / 60Hz, and line frequency of 45KHz.

D5 is a 1080p format, which is a standard digital TV display mode, with 1125 vertical scanning lines, 1080 visible vertical scanning lines, 16: 9, resolution of 1920 × 1080 progressive scanning, professional format.

In addition, there is 576i, which is a standard PAL TV display mode, with 625 vertical scanning lines, 576 visible vertical scanning lines, 4: 3 or 16: 9, interlaced / 50Hz, denoted as 576i or 625i.

HDTV refers to TV standards that support 1080i, 720P and 1080P. Today's large-screen LCD TVs generally support 1080i and 720P, and some commonly known as "Full HD" refer to TVs that support 1080P output. Today's HDTV digital signals support up to 720P.

What is a DVD player:

DVD players now include DVD Video Player for video and DVD Audio Player for audio. Nowadays, it is common for everyone to use DVD Video Player, which is used to play back high-quality DVD movies. The first-generation DVD video players were basically the products of Japanese companies such as Panasonic, Toshiba, Sony, and South Korea's Samsung and LG. Due to copyright protection, most of the initial products adopted area code restriction technology. However, in the subsequent upgrade products, Sony Corporation took the lead in launching the full area code player, which further increased the popularity of the product. Most of the domestic third-generation DVD players, such as Shinco and Aiduo, are all area code products.

As a typical DVD player should include at least two core parts: the decoding chip and the movement. The function of the decoding chip is to decode the signal read by the laser head. Its quality directly affects various functions such as the level of image sharpness and whether the audio processing is 100% digitized.

The DVD movement is responsible for the rotation of the DVD video disc, and the signal reading is completed by the DVD laser head. The DVD player has developed from the first generation to the third generation and even the fourth generation. The structure of the laser head of the key device has also changed a lot, and the single optical head has replaced the dual optical head. In order to be more compatible with CD / VCD discs, the first generation of DVD players adopted dual-optical head reading technology. However, with the continuous updating of the existing technology, the shortcomings of high cost, multiple coils, and complicated mechanical structure of dual-optical heads were gradually exposed As a result, the advantages of a single optical head with a simple optical path structure, a small number of components, a sensitive response, and stable performance have begun to emerge, coupled with better film reading capabilities and stronger compatibility, becoming the mainstream trend of DVD players today.

In terms of function, the function of the DVD player is also very different from other video playback equipment. Because the DVD uses advanced international standard MPEG-2 image compression technology and VBR technology, the DVD can reach a horizontal resolution of more than 500 lines. If you want to enjoy better picture quality of DVD, users are better to buy large screen color TV (29 inches or more) or digital TV to match it, but even with ordinary TV, the image of DVD will be better than VCD or Super VCD Images are sharper and smoother. In terms of audio, DVD players can be compatible with Dolby AC-3, MPEG-2, DTS and other sound playback technologies. In addition to high image and sound quality, DVDs also have a variety of unique features:

Multi-Angle Function You can watch DVD videos from different angles at any time. Players and video discs with multi-angle selection can be viewed from up to four different angles during playback.

Multi-story function (Multi-Story) Allows users to select different story development episodes, and arrange programs according to personal preferences.

Multi-Language This function allows you to select different languages to watch DVDs. It can provide up to eight languages.

Multi-Subbtitle This function allows the user to select one of the language subtitles to watch a DVD. There are at most 32 languages for subtitle selection.

Multi-Aspect Function You can watch movies with an aspect ratio of 16 9 through the TV screen settings. Even ordinary TV sets with an aspect ratio of 4 3 can also watch movies according to the set aspect ratio of the movie. Picture or panorama.

In addition, the DVD player also includes child lock function, hierarchical fast forward, fast rewind, slow playback, and programming functions to meet some basic operation requirements of users. In essence, the function it provides is similar to VCD playback, but its image quality and sound quality have been upgraded to a considerable level.

Today, ordinary DVD players only provide 480i or 480p format output, which cannot match the 1080p resolution display capability of the increasingly popular HD digital TVs.

HD DVD player:

There are many definition products for HD DVD players on the market today, including digital streaming media players, Blu-ray players and HDTV DVD players.

A digital streaming media player is equivalent to a computer without an operating system. It uses software decoding to directly interpret digital audio and video information and output it to a display device. The decoding format is almost unlimited, but it does not have a video disc drive and cannot play ordinary DVDs. Discs, film sources are mainly downloaded from the Internet.

In the strict sense, the source carrier of the Blu-ray player is no longer our common DVD. It has a larger information capacity and may store more audio and video information to achieve higher fidelity. However, the cost is more than ten times higher than that of an ordinary DVD, and it is not yet popular.

In contrast, a DVD player with a double-line function is more in line with the definition of a high-definition DVD player: a universal DVD audio-visual playback device capable of outputting high-definition digital signals with a resolution of 720p or higher. Most people also agree to define a DVD player with a doubled function as a high-definition DVD player.

HD Zoom DVD:

As we all know, the resolution of the signal source is the best display effect for the resolution of the display terminal. The emission pixels of the signal source correspond to the display pixels of the terminal one by one. If a high-resolution display is used, it can only run at a low resolution The picture will be terrible. Now that the TV has developed to the high-definition realm of 1080i, the resolution of 720x480p of the original DVD player naturally cannot keep up, and the HDTV DVD was launched. There are two ways to implement the double-line DVD, one is analog, and the other is digital. Digital double-line DVD is the main character we are going to introduce here.

The analog double-line DVD and color component (component video) output signals require the sampling frequency and accuracy of the digital-to-analog converter to be high enough to obtain satisfactory results. There are fewer commercial products and the price is high.

Digital double-line DVD and HDMI (High Definition Multimedia Interface) reduce the process of digital-to-analog conversion and reduce interference and distortion. As long as it is equipped with a flat-panel TV with HDMI, the best DVD viewing experience can be obtained. At the same time, HDMI is also compatible with DVI (Digital Visual Interface, Digital Video Interface), and can be connected to a PC for use.

HDMI can transmit video and audio signals through a single cable, so connection is fast and easy, and the area around the TV is clean. Moreover, when each connected device supports HDMI, control signals can also be exchanged between them. This means that in the future, several machines can be operated with a single remote control, or several machines can be operated through link control.

Nowadays, there are not many professional double-line DVDs in the market. There are mainly Tianlong, Marantz, OPPO, Philips, Pioneer and other brands, and the prices are generally higher.

But soon EVD will replace DVD