What is MPEG compression standard?
To lower the total number of parameters required to represent the signal while maintaining good quality, compression is needed. The parameters are coded for transmission or storage. The result of compressing digital video is that it becomes available as computer data, ready to be transmitted over existing communication networks. There are several different compression standard around today. MPEG, which standards for moving pictures experts groups, is one of the multimedia video compression standards.
MPEG audio encoding standard:
MPEG Audio Layer1/2: MPEG Audio Layer1/2 is MP1, MP2. It is an earlier audio encoding format and mainly used in VCD, DVD and SVCD.
MPEG Audio Layer 3: MPEG-1 or MPEG-2 Audio Layer III, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage and a digital audio compression standard for the transfer and playback of music on most digital audio players.
MPEG-4 AAC: An audio coding standard for lossy digital audio compression. It has better sound quality than MP3 at similar bit rates.
MP3 PRO: Add SBR technology into MP3 is MP3 PRO but MP3 PRO is not widely used as MP3 by people.
MPEG video encoding standard:
MPEG-1: As the first MPEG compression standard for audio and video, MPEG-1 is commonly limited to about 1.5 Mbit/s. It is commonly used on Video CD and can be used for low-quality video on DVD Video. To meet the low bit requirement, MPEG-1 downsamples the images, as well as uses picture rates of only 24-30 Hz, resulting in a moderate quality.
MPEG-2: MPEG-2 is the transport, video and audio standards for broadcast-quality television. It supports interlacing and high definition. It has been chosen as the important compression scheme for over-the-air digital television ATSC, DVB and ISDB, digital satellite TV services like Dish Network, digital cable television signals, SVCD and DVD Video.
MPEG-4: MPEG-4 uses further coding tools with additional complexity to achieve higher compression factors than MPEG-2. It is developed to meet the needs of network transmission. It utilizes a series of new technology to meet the needs of transmitting the high quality video i a slow broadband connection. MPEG-4 supports Intellectual Property technologies to manage and protect the content like digital rights and management.
MPEG-4 AVC: MPEG-4 AVC (or MPEG-4 Part 10 or H.264). MPEG-4 AVC may be used on HD DVD and Blu-ray Discs, along with VC-1 and MPEG-2.