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Chapter 1. Basic Concepts > Appendix
Appendix
| Compression Standard | Description |
|---|---|
| MNP 5 | Microcom Network Protocol compression protocol developed by Microcom for modems. Provides 2:1 compression. |
| V.42bis | Data compression protocol for modems. Provides 4:1 compression. |
| H.320 | A family of standards for video adopted by the ITU (International Telecommunications Union). Quality is not as high as proprietary video compression algorithms. Most video codecs employ both proprietary and standard compression algorithms. The proprietary compression is used to transmit to another "like" video unit and the standard algorithm is used when conferencing between differing brands. |
| H.323 | A family of standards for video adopted by the ITU (International Telecommunications Union) for sending video over packet networks. Microsoft Corporation and Intel Corporation adopted the standard in 1996 for sending voice over packet networks. It is installed on Windows® based personal computers and used to packetize and compress voice when callers with PCs make calls from their computers over the Internet. See Chapter 9. |
| MPEG3 | Moving Picture Experts Group 3 is Layer 3 of MPEG1. It is a compression standard for streaming audio. MPEG3 is the compression algorithm used to download audio files from the Internet. For example, some Internet e-commerce sites allow people with compression software to download samples of music so they can decide if they wish to purchase a particular CD. In addition, people with multi-media computers are playing CDs on their computers or on CD burners and distributing copies to friends without paying royalties. |
| MPEG2 | A Moving Picture Experts Group standard approved in 1993 for coding and decoding video images. MPEG2 uses past images to predict future images and color and transmits only the changed image. For example, the first in a series of frames is sent in a compressed form. The ensuing frames send only the changes. A frame is a group of bits representing a portion of a picture, text or audio section. |
