Four portions of H.264 (BP, EP, MP, HP) and Profile, Level, Encoder

Brief introduction ~~~~~~~ First, to clarify the fact that the so-called AVC H.264 standard, was developed together with the Joint Video Team (JVT, Joint Video Team) by ITU-T and ISO / IEC composition, to the ITU-T H.264 standard named ( formerly known as in H.26L), and ISO / IEC called MPEG-4 advanced video coding (advanced video coding, AVC) which is positioned to cover the entire video applications, comprising: a wireless application low bit rate, standard definition and high definition television broadcasting applications, streaming video applications on the Internet, high-definition DVD video transmission used in digital cameras and high quality video applications and so on. AVC's three sizes From low to high as follows: Baseline, Main, High. Baseline (lowest Profile) support the level of I / P frame, only support non-interlaced (Progressive) and CAVLC, generally used for low-end applications requiring additional or fault-tolerant, such as video calls, mobile video and other; Main (Main Profile) level to provide I / P / B-frame, non interlaced support (Progressive) and interleaved (interlaced), also provides support for CAVLC and CABAC for mainstream consumer electronics products such as low decoding specification (relatively speaking) the mp4, portable video player device, PSP and Ipod etc; High (high-end Profile, also known as FRExt) levels increased 8x8 intra prediction on the basis of Main, custom quantization, lossless video coding and more YUV format (such as 4: 4: 4), for broadcast and video storage disc (Blu-ray movies), the application of high-definition TV. AVC specifications mainly for compatibility, different specifications can be applied on the same platform level. As Baseline @ L x.x, Main @ L x.x, High @ L x.x stream is in the form of level, the greater the value the greater the stream at different levels, and more resource-consuming. So on stream in terms of High @ L3.0