What is H.264 (MPEG-4 AVC)? - Definition from WhatIs.com

Definition

H.264 (MPEG-4 AVC)

Part of the Computing fundamentals glossary:

H.264, also known as MPEG-4 AVC (Advanced Video Coding), is a video compression standard that offers significantly greater compression than its predecessors.

The standard offers up to twice the compression of MPEG-4 ASP (Advanced Simple Profile). In addition to improvements in perceptual quality, the H.264 standard can provide DVD-quality video at under 1 Mbps.

The enhanced compression and perceptual quality of H.264 are obtained by motion estimation, which minimizes temporal redundancies; intra estimation, which minimizes spatial redundancies; transformation of motion estimation and intra estimation into the frequency domain; reduction of compression artifacts; and entropy coding, which assigns a smaller number of bits to frequently encountered symbols and a larger number of bits to infrequently encountered symbols.

This was last updated in September 2005
Contributor(s): Molly Ruggles
Posted by: Margaret Rouse

Related Terms

Definitions

  • theory of relativity

    - Albert Einstein's theory of relativity is actually two separate theories: his special theory of relativity, postulated in the 1905 paper, The Electrodynamics of Moving Bodies and his theory of gene... (WhatIs.com)

  • tilde

    - A tilde (pronounced TILL-duh or TILL-dee) looks like this: ~. It's a special typographic character found on most keyboards that means various things, depending on the context. (WhatIs.com)

  • IFrame (Inline Frame)

    - The IFrame HTML element is often used to insert content from another source, such as an advertisement, into a Web page. Although an IFrame behaves like an inline image, it can be configured with it... (WhatIs.com)

Glossaries

  • Computing fundamentals

    - Terms related to computer fundamentals, including computer hardware definitions and words and phrases about software, operating systems, peripherals and troubleshooting.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question About H.264 (MPEG-4 AVC)Powered by ITKnowledgeExchange.com

Get answers from your peers on your most technical challenges

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.