Aug 29, 2009

7,Indeo video 5.10


This encoding scheme is also developed in the laboratory intel architecture, and it inherits the advantages of Indeo video R3.2, the corresponding file format is still AVI, decoding speed is also very fast. Windows ME/2000 comes with the Indeo video 5.1 of the Codec, a lot of games also apply to Indeo video 5.10 to encode their own animated demonstration. In the absence of DivX universal, is almost the most popular AVI encoding, and at the same time as Microsoft and intel support, this coding scheme has been widely adopted.

8,H.264


H.264 is also known as MPEG4-AVC, MPEG series of standards belong to ISO / IEC, in order to formulate the main body of international communications standards: ITU-T, the completion of H.263 (used for video conferencing streaming video standard) after the start of the development of more advanced H.264, and the newly enacted with the ISO / IEC body with hands and set up jointly by the two agencies called JVT (Joint Video Team) of the joint working group to MPEG-4 technology as the basis for more appropriate for video conferencing (Video Conference) use of derivative development, but also because it is jointly developed, and therefore known as the ITU-T in H.264, in the ISO / IEC for MPEG area is called MPEG-4 Part 10 (Part 10, also known as ISO / IEC 14496-10), MPEG-4 Part 10 by another name is MPEG-4 AVC (Advanced Video Coding, Advanced Video Coding), more than one name is an implication that the H. 264 = MPEG-4 Part 10 = ISO / IEC 14496-10 = MPEG-4 AVC.
Fortunately, in the end H.264 Which? Allow us to be MPEG-2, MPEG-4 (MPEG-4 Part 2), H.264 (MPEG-4 AVC, MPEG-4 Part 10) for resolution of the three performance comparison of bandwidth used, regardless of MPEG-2 , MPEG-4, H.264, all three can be up to 1920 × 1080i (non-interlaced) high-definition (High Definition, HD), 24fps (updated 24 pictures per second) and image quality, but the transmission bandwidth MPEG-2 needs 12 ~ 20Mbps, the relative H.264 as long as 7 ~ 8Mbps, while the MPEG-4 are somewhere between the two, more directly, if the bandwidth of the MPEG-2 used as a benchmark of 100%, MPEG - 4 To achieve the same effect only 60% of the bandwidth, H.264 is as low as 40%, or about the original MPEG-2 1 / 2 ~ 1 / 3.
It is worth mentioning that the use of the entropy decoding H.264 standard, there are two: one is content-based Adaptive Variable Length Coding (CAVLC) with a unified variable-length coding (CAVLC) with; the other is content-based self - adapted binary arithmetic coding (CABAC). CAVLC and CABAC adjacent blocks according to the current situation of block codes, in order to achieve better coding efficiency. CABAC compression efficiency than CAVLC, in the case of very quality can save about 20% of the bandwidth, but more complex.
VC-1 is simply a video compression algorithm, there is no WMV in digital rights management, metadata, playlists, and user interface to these elements.

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