What is MPEG?




MPEG stands for the Motion Picture Experts Group, part of the International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC), which creates and publishes standards for various areas of technology, respectively. MPEG standards address audio and video formats used online, in television broadcasts, and in DVD media.

A number of MPEG standards are in current use, and more are sure to follow. Some well-known standards are explained briefly below.


MPEG-1: This first set of standards was developed for audio and video compression. Layer 3 is a codec within these standards, known simply as MP3, or the popular audio compression format for music.
This video format was used to store movies on CDs, known as Video CD, or VCD. Quality is equal to that of a VHS tape, and compatibility playback on CD/DVD players is high. One drawback of this standard is that it only supports progressive footage, verses the inclusion of interlaced. These terms relate to the way a picture paints itself across a screen. Progressive monitors (including progressive TVs) paint a picture "from top to bottom" progressively in a single, sequential pass. Interlaced displays paint every other line, then fill in the odd lines in a two-pass process.

MPEG-2: This standard improved on MPEG-1 by including the ability to encode interlaced pictures. It is widely used for digital cable, satellite and over the air digital signals. This format is also prevalent for movies distributed on DVD. Television receivers, DVD players and television stations typically incorporate this standard.
MPEG-2 also contains two container formats: the Transport Stream and Program Stream. These relate to the way digital broadcasts are transmitted and formatted to media, respectively.


MPEG-3: The intention was to make this standard compatible with high-definition TV (HDTV), but this became unnecessary when MPEG-2 extensions expanded that standard's ability to encompass HDTV. At that time, this standard was abandoned.


MPEG-4: Borrowing from the first two standards, MPEG-4 extends functionality of audio/video compression by improving format flexibility. It supports 3-D rendered objects, as well as incorporating the copyright protection scheme known as Digital Rights Management (DRM). This standard can be used for broadcast television, online streaming media, applications such as videophone, and distribution on digital media.
The MPEG-4 standard is developed in “parts” associated with some well-known codecs. For example, DivX, Xvid, Nero Digital and Quicktime6™ are a few codecs that use part 2. A different version of Nero Digital (AVC), and Quicktime (version 7) use part 10, as does the x264 codec. Blu-ray discs and some types of HD DVDs also use this flavor.


MPEG continues to develop (non-sequentially numbered) standards, such as MPEG-7 and MPEG-21, dedicated to multimedia content.

Comments

  1. sophiaxo18 August 2017 at 10:42

    This is really in-depth and I didn't really know what it is but I do now! so thank you for sharing!

    Sophia xo // https://sophiaaaxo.com

    ReplyDelete
  2. Official Savana Rae19 August 2017 at 04:24

    Its so complicated thank god you explain it all ..

    ReplyDelete

Post a Comment

Popular posts from this blog

How do Scanners work?

Image
So it's 11:45 p.m. and you're laying alone on your dust ridden bed watching fancy television series (GoT, maybe) and suddenly your phone lines up with a message from a friend who reminds you of a deadline to submit a copy of a very important document, to the administration, that is sitting in your closet dust covered. So you're going to take a picture of it with your phone but you realize your crappy built-in phone camera and the poor lighting from the dingy bare bulb hanging from the ceiling just aren't helping. So decisively you dash to your PC and use your flatbed scanner and as you sit there listening to the whirling of the scanning mechanism and pondering how your life got to this point you find yourself asking how the heck do these things work anyway. Great question, your typical scanner uses something called a charge-coupled device or CCD to determine what's on the page. The main idea here being that the CCD can convert light into an electrical cha...
Read more

What is a proxy server?

Image
A proxy server is a computer that sits between a client and a server to intercept requests. There are several uses of a proxy server, but the most common is to speed network traffic by caching pages or files that are requested often. By doing so, the server can deliver the request quickly, only polling the server when required. In this way, it not only speeds up network traffic, but also relieves server load. Major Internet hubs and Internet Service Providers (ISPs) employ dozens of proxy servers. Filtering or censorship is another use for a proxy server. A company that provides Internet connectivity to its employees might configure such a server to block requests for certain websites. It can also filter content based on configurable criteria to help enforce acceptable use policies. If a proxy server does not require a Web browser to be configured to use the proxy, it’s called a transparent proxy. Otherwise, the Web browser must point to the proxy in order to ...
Read more

What is the Difference Between Gasoline, Diesel Fuel, and Fuel Oil?

Image
Gasoline(Petrol), diesel fuel and fuel oil are all petroleum products. Petroleum is a mixture found in the earth, composed of crude oil and natural gas. While the products that are derived from petroleum power the modern world, raw petroleum is of little use until it is refined. It is the refining process that converts crude oil into gasoline, fuel oil, and diesel fuel. Crude oil is a complex mixture of hydrocarbons that are chained together in different lengths. These chains have different characteristics and properties and form the basis for the individual products created out of raw petroleum. To be able to convert these hydrocarbon chains into gasoline, diesel fuel, fuel oil and other petroleum products, they have to be separated from other chains. Crude oil is separated into these different chains through distillation. During distillation, crude oil is heated in a distillation column. Collection trays are placed at differing heights in the col...
Read more