The DVD has the reputation of being the most popular home entertainment product in existence, even in the era of smartphones and internet viewing.
It didn’t too take long for it to become the principal source of video entertainment in most families when it was released in 1997. In fact, even today, in their houses, a significant number of consumers have two, or perhaps more, devices that can play DVDs.
How much do people indeed know, though, about their DVD player and what it can and can’t do? Find the facts out.
Table of Contents
- What the “DVD” Letters Really Stand For
- What separates DVD from VHS
- Coding DVD zone
- Audio control on a DVD
- Video Links DVD Player
- Using a TV Antenna / Cable Connection DVD Player
- DVD vs DVD Movie Made on a DVD Recorder or PC
- DVD Players and Search Progressive
- How DVD Players Can Play CDs
- What DVD player or CD-only player is best for playing CDs?
- Nice DVDs for Superbit
What the “DVD” Letters Really Stand For
DVD refers to Digital Versatile Disc. DVDs may be used to store video, audio, still images, or data from a computer. Many individuals prefer to a DVD as a digital video disk, although this is not technically accurate.
What separates DVD from VHS
In the following respects, DVD varies from VHS:
For VHS, audio and video information is embedded on a videotape-recorded magnetic imprint read by a spinning head in a VCR. Video and audio knowledge for DVDs are embedded in pits that a laser reads optically.
Ironically, a DVD physically has more than videotape in common with the conventional vinyl record. In actual grooves, which are manually read by a stylus, audio signals on a vinyl record are imprinted.
In addition to the groove vs pit disc construction, the distinction is that an analogue waveform is a signal on a vinyl record and digital bits are the signal on a DVD.
Both the standard 4×3 and anamorphic 16×9 widescreen aspect ratios are provided by DVD.
DVD is capable of delivering twice the resolution of video than VHS, providing a much more comprehensive image and greater colour accuracy. However, while DVD offers a higher resolution than VHS, in the Upscaling DVD Players section of this article, it is not a true high definition format.
Every part of the DVD can be accessed randomly or very easily, while a VHS tape must be quickly forwarded or rewind to reach a particular location on the tape.
Interactive menus and added features are provided on the DVD, such as multiple language tracks, audio commentary, and additional features not included in the VHS format. Closed Captioning and On / Off Subtitling in many languages are also provided on DVD.
Synchronized multiple camera angle viewing is assisted by DVD so that the filmmaker provides the DVD production personnel with the alternative camera angle footage shot during the shooting process (this function is seldom used).
Magnetic fields do not affect DVDs. It is not necessary to delete commercial DVDs.
Coding DVD zone
Regional coding is a contentious method introduced by the MPAA (Motion Picture Association Of America) that, based on feature film release dates and other factors, regulates the distribution of DVDs in world markets.
The Planet is split into several regions for DVDs. Only DVD players that are coded for a particular area will play DVDs.
There are DVD players, however, available that can bypass the framework of Area Code. A DVD player of this kind is known as a Code Free DVD player.
Audio control on a DVD
One of DVD’s benefits is its ability to provide many choices for audio on a disk.
Since the audio on a DVD is digital, either an analogue or digital type can be accessed. DVD players have normal stereo analogue audio outputs that can be paired with stereo audio inputs to any stereo system or stereo TV.
DVD players often have digital audio outputs that can be paired with digital audio inputs to any AV receiver. To use Dolby Digital or DTS 5.1 surround sound audio, you have to use either digital optical or digital coaxial audio connections.
Video Links DVD Player
There are standard RCA composite video, S-video, and Part Video outputs on a bulk of DVD players or devices.
The component video outputs may transfer either a normal interlaced video signal or a progressive video scan signal to a TV on most DVD players (more on that later in this article). For a better link to HDTVs, most DVD players also have DVI or HDMI outputs. Usually, DVD players don’t have antenna/cable outputs.
Using a TV Antenna / Cable Connection DVD Player
Manufacturers didn’t account for one thing: a requirement for players to be able to link on older analogue TVs to a regular antenna/cable input.
You need a little device called an RF Modulator, which is mounted between the DVD player and the TV, to connect a DVD player to a TV that only has an antenna/cable connection.
We also illustrated step-by-step instructions in an article that covers connecting an RF modulator, TV, and DVD player together in the event you still have a TV that only has an antenna or cable link.
DVD vs DVD Movie Made on a DVD Recorder or PC
DVD movies you purchase or rent have different features from DVDs you make on your PC or DVD recorder at home.
DVDs The formats used to film DVDs for consumer use are similar to those used in commercial DVDs, called DVD-Video. The way the video is captured on the DVD is different, though.
To store video and audio content, both homemade and commercial DVDs use pits and bumps that are physically created on the disks, but there is a difference in how pits and bumps are created on commercial DVDs vs home-recorded DVDs.
Commercial DVD movies are created with a stamping system, much like the way vinyl records are made, although the technology is obviously different (vinyl records are stamped with grooves versus pits and bumps stamped on DVD).
DVDs made on a DVD recorder or a PC at home are burned.
DVD Players and Search Progressive
As a result of scanning a series of lines on a screen surface in a format called interlaced scan, normal footage, such as from VHS VCRs, camcorders, and most TV broadcasts, is seen on a screen (such as CRT displays).
Interlace Scan is video lines shown on a TV screen in an alternative fashion. First, all of the odd lines are scanned, then all the even lines. These are classified as fields.
Two fields of video (that is the origin of the term interlaced) compose an interlaced scanned frame. Even though video frames are shown every 30th of a second, the audience only sees half the picture at any given point in time. The viewer interprets the video on the screen as a full image, since the scanning process is so quick.
Progressive scan images are distinct from interlaced scan images in that each line (or row of pixels) is scanned in a sequential order rather than an alternative order to view the image on a screen.
In other words, image lines (or pixel rows) are scanned from the top to the bottom of the frame in numerical order (1,2,3) rather than in alternative order (lines or rows 1,3,5, etc. followed by rows or rows 2,4,6).
By gradually scanning the image on a screen every 60th of a second instead of interlacing alternate lines every 30th of a second, it is possible to create clearer, more detailed images on the screen that are perfectly suited to displaying fine information, such as text, and are therefore less prone to flickering.
You must have a TV that can view progressively scanned images, such as an LCD, Plasma, OLED TV, or LCD and DLP video projector, in order to access a DVD player’s progressive scan feature.
The progressive scan function of a DVD player can be switched off or on. This means that the player can still be used with a TV that can only display scanned interlaced images (such as an older CRT set).
How DVD Players Can Play CDs
While CDs and DVDs share some fundamental similarities, such as disc size, digitally encoded video, audio, and/or still image data stamped (commercial) or burned (home recorded), they are also distinct.
The primary difference is that DVDs and CDs are different in the size of the pits or burned surface. As a result, they each require that a light beam of different wavelengths be sent by the reading laser to read the information on each type of disk.
A DVD player is fitted with one of two things to do this: a laser that has the ability to reliably adjust its focus based on DVD or CD detection, or, more often, a DVD player may have two lasers, one for reading DVDs and one for reading CDs. A Twin-Laser Assembly is also referred to as this.
The other explanation of why CDs can also be played by DVD players is not so much technological as a deliberate marketing technique.
In 1996-1997, when DVD was first released on the market, it was determined that one of the best ways to increase DVD player sales and make them more attractive to customers was to also include the ability to play CDs as well.
As a result, the DVD player simply became a DVD player and a CD player, two units in one.
What DVD player or CD-only player is best for playing CDs?
While certain audio processing circuits are shared, the basic specifications for compatibility with both CDs and DVDs are separately accommodated within the same frame.
As to whether ALL DVD players are better, not all of them are CD players. Unit-by-unit, you could compare them. A great number of DVD players, however, are also really good CD players. This is due to their circuitry for higher-end audio processing.
Also, it is getting harder to find CD-only players because of the success of DVD players. Along with a few carousel-type players, most CD-only players available these days are either mid or high-end single tray units.
Jukebox players for CDs and DVDs were once abundant, but have since fallen by the wayside.
Nice DVDs for Superbit
Superbit DVDs are DVDs that only use the movie and the soundtrack for all the space; there are no extras on the same disk, such as comments or other special features.
The explanation for this is that the Superbit method uses a DVD disc’s entire bit-rate (thus the term Superbit) capacity, improving the DVD format’s efficiency.
There are more depth and variety in colours and fewer problems with edge artefacts and video noise.