Difference between revisions of "Information on Video Codecs"
| Line 1: | Line 1: | ||
| − | X-lite has various video codecs implemented. The implemented codecs of the X-lite 3.0 version are H.263 and H.263+. For example YouTube and Google Video also use this encoding format. The improvement of H.263 has lead to the development of H.263v2 (or H.263+) in 1998 and H.263v3 (or H.263++) in 2000. A significant improvement has lead to the development of H.264 and is also known as MPEG-4 (part 10). This H.264 codec is not available when using X-lite, but is available when using eyebeam 1.5, although some codecs require payment of royalities for their use in a product or program. | + | X-lite has various video codecs implemented. The implemented codecs of the X-lite 3.0 version are H.263 and H.263+. For example YouTube and Google Video also use this encoding format. The improvement of H.263 has lead to the development of H.263v2 (or H.263+) in 1998 and H.263v3 (or H.263++) in 2000. A significant improvement has lead to the development of H.264 and is also known as MPEG-4 (part 10). This H.264 codec is not available when using X-lite, but is available when using eyebeam 1.5, although some codecs require payment of royalities for their use in a product or program. Transfer rates of the H.263 and H.261 are given in the table below. |
| Line 17: | Line 17: | ||
|} | |} | ||
| − | Whether the H.263 codec uses 16 or 256 Kbps | + | Whether the H.263 codec uses 16 or 256 Kbps |
[http://en.wikipedia.org/wiki/H.263 H.263] is a codec designed for videoconferencing using low-bitrate compression. | [http://en.wikipedia.org/wiki/H.263 H.263] is a codec designed for videoconferencing using low-bitrate compression. | ||
With [http://trace.eas.asu.edu/tools/H.263.pdf H.263] the contraints on the bit rate are applied externally and are given by the used terminal or the network. | With [http://trace.eas.asu.edu/tools/H.263.pdf H.263] the contraints on the bit rate are applied externally and are given by the used terminal or the network. | ||
Revision as of 10:09, 23 February 2007
X-lite has various video codecs implemented. The implemented codecs of the X-lite 3.0 version are H.263 and H.263+. For example YouTube and Google Video also use this encoding format. The improvement of H.263 has lead to the development of H.263v2 (or H.263+) in 1998 and H.263v3 (or H.263++) in 2000. A significant improvement has lead to the development of H.264 and is also known as MPEG-4 (part 10). This H.264 codec is not available when using X-lite, but is available when using eyebeam 1.5, although some codecs require payment of royalities for their use in a product or program. Transfer rates of the H.263 and H.261 are given in the table below.
| Codec | Compression method | Transfer rate |
|---|---|---|
| H.263 | Videocodec (DCT) | 16-256 Kbps |
| G.261 | Videocodec (DCT) | 64-256 Kbps |
Whether the H.263 codec uses 16 or 256 Kbps
H.263 is a codec designed for videoconferencing using low-bitrate compression.
With H.263 the contraints on the bit rate are applied externally and are given by the used terminal or the network.
