Table 1 also shows results for the conventional H.264/AVC codec working in IBPBP and modes without rate-distortion optimization.
For the case of IbIbI mode, the encoder is about 3 times slower than the temporal scalable codec working in IZIZ mode.
We compare (i) conventional H.264/AVC codec working in IBPBP or mode, with 2 reference frames, search range of 16 pixels and CAVLC entropy encoder, (ii) the SSWZ codec after three iterations (in IbPbP or IpPpP modes) with similar coding settings, and (iii) conventional coding in IBPBP or modes but with a search range of zero (i.e., zero motion vector coding).
MP3s and other "lossy" audio codecs work by getting rid of data that is considered unimportant.
Note that in practice typically multimedia codecs work well under a packet loss rate of no more than 10−4, so the recovery performance can be measured by the received ratio where the recovery probability goes above 1−10−4, which is called Successful Received Ratio (SRR).
"There is fairly good demand for high-quality video sent over very narrow communication links, and they're among the leaders in supplying codecs that work at very low data rates," said John Harrington, a design engineer at Sandia National Laboratories in Albuquerque, an Energy Department center managed by Lockheed Martin.
The Stanford WZ video codec [4] works at the frame level, uses turbo or low-density parity-check (LDPC) codes in the Slepian-Wolf codec and a feedback channel-based decoder rate control approach.
The MP3 codec was the work of the Moving Picture Experts Group, an international organisation that sets standards for audio and video compression and transmission.
In case you forgot, it already supported about one metric ton of containers and codecs and also works with streaming video sites like Revision3.
With both the next-gen H.265 standards and Google's VP9 codecs already in the works, today's agreement could mean we'll see more competition in the video codec space in the coming months.
